Power-Free Bidet Toilet with Built-in Power-Free Bidet System and Operation Method Thereof

Abstract

A power-free bidet toilet includes a built-in power-free bidet system which includes an activation switch configured to activate a buttocks-cleaning operation and a self-cleaning operation, a water supply arrangement configured for supplying the water directly from the external water source for flushing and cleaning, wherein the water supply is initiated when selectively activating to an operation condition and is stopped when selectively deactivating to a standby condition, and a spray assembly configured to be built-in the toilet bowl and equipped with the activation switch to directly supply the water from the external water source by a hydraulic force to perform the buttocks-cleaning operation and the self-cleaning operation when the activation switch is activated to perform the buttocks-cleaning operation.

Description

CROSS REFERENCE OF RELATED APPLICATION

[0001] This application is a nonprovisional application that claims the benefit of priority under 35U.S.C. § 120 to a provisional application, application No. 63 / 726,572, filed Dec. 1, 2024, which is incorporated herewith by reference in its entirety.BACKGROUND OF THE PRESENT INVENTIONFIELD OF INVENTION

[0002] The present invention relates to a toilet, and more particularly to a power-free bidet toilet equipped with a built-in power-free bidet system comprising a nozzle body that is configured to be automatically extended out to an operation condition when a water supply is switched on to spray water for cleaning the user's buttocks as well as self-cleaning the nozzle body, and automatically retracted to a standby condition when the water supply is switched off.DESCRIPTION OF RELATED ARTS

[0003] In the past, cleaning the buttocks after using the toilet with toilet papers, moist wipes, wet cloths and like in a gently wiping manner, which may not remove all residue effectively, leading bacterial built-up, discomfort, itching, and odor. Alternatively, many people prefer rinsing with water manually (hand contact) using handheld sprayers, which can be gentler on the skin and more hygienic, but it increases the risk of spreading bacteria to the hands, especially handwashing is not done thoroughly after wiping.

[0004] A conventional bidet is generally positioned next to a toilet, wherein the user moves toward the bidet after using toilet, which allows the user sitting over the basin and wash the user's buttocks with water from a faucet or a built-in sprayer. In a certain situation, some residue maybe dripped onto the floor when the user moves forward from the toilet to the bidet. Furthermore, a larger space is wasted for allowing both the toilet and the bidet.

[0005] In recent years, the respective functions and features of a toilet and a bidet are integrally combined to a single, all-in-one, bidet toilet for offering space saving, more hygiene, and providing convenience. However, such integrated bidet toilet is electrically controlled and actuated, requiring electrical power supply, that not only is expensive to most users but also has unsolved problems as follows.

[0006] (1) Some users may find the automated cleaning uncomfortable, especially if they are not used to the feeling or the settings of the automatic cleaning system are not customized enough.

[0007] (2) Some users, especially older adults or those not familiar with technology, may feel overwhelmed or have difficulty using or operating the complex system.

[0008] (3) The electrically actuated nozzle itself, if not adequately cleaned or shieled, can accumulate bacteria and residue, causing hygiene issues and requiring frequent manual or chemical maintenance.

[0009] (4) The automatic cleaning function requires electricity and large amounts of water to support so as to increase utility bills, which may not be sustainable or economical in the long run if the cleaning system is not energy efficient.

[0010] (5) The electric integrated bidet toilets with auto-cleaning functions are generally more expensive than regular toilets without the bidet systems, and require higher preventive maintenance costs. Additionally, such complex components may require specialized service, and costs of repairs or part replacements may be significant if professional assistance is required.

[0011] (6) The electric integrated bidet toilets are fully dependent on electricity and the users are not allowed to access the cleaning functions when there is no electric power source provided near the toilet to be located.

[0012] (7) Malfunctions such as clogging, sensor failures, nozzle blockages and other unexpected issues can lead to inconvenient and expensive repairs for the electric integrated bidet toilets with a plurality of components and settings.

[0013] (8) Thoroughly cleaning a toilet can be challenging, particularly in the gaps of hinged connection between the bidet seat and the bowl body. The debris and residue often accumulate in these hard-to-reach areas and cannot be effectively removed without detaching the bidet seat from the bowl body, especially in bolt-on mounting systems, which requires tools. This makes daily cleaning time-consuming and inconvenient.SUMMARY OF THE PRESENT INVENTION

[0014] The present invention is advantageous in that it provides a toilet equipped with a built-in power-free bidet system which comprises a nozzle body that is capable of automatically extending out to an operation condition when a water supply is switched on to spray water for cleaning the user's buttocks as well as self-cleaning the nozzle body.

[0015] Another advantage of the present invention is to provide a built-in power-free bidet system for a toilet, wherein the nozzle body is capable of automatically retracting to a standby condition when the water supply is switched off.

[0016] Another advantageous of the present invention is to provide a built-in power-free bidet system for a toilet which nozzle body can be extended to the operation condition by a hydraulic force when water supply is selectively switched on, and be retracted to the standby condition by a resilient force when the water supply is selectively switched off.

[0017] Another advantage of the present invention is to provide a toilet with a built-in, power-free bidet system for cleaning the buttocks directly from an external water source.

[0018] Another advantage of the present invention is to provide a toilet with a built-in power-free bidet system for removing residue or human waste without manual contact, which improves a sanitary environment.

[0019] Another advantage of the present invention is to provide a toilet with a built-in power-free bidet system that provides a user's buttocks cleaning capability as a combination of a toilet and a bidet to save space without the need for any electrical power.

[0020] Another advantage of the present invention is to provide a toilet with a built-in power-free bidet system for allowing users to clean their buttocks immediately without leaving the toilet after using another bidet for cleaning, which avoids any residue dripping onto the floor and maintains environmental hygiene.

[0021] Another advantage of the present invention is to provide a toilet with a built-in power-free bidet system that enables hands-free cleaning of the buttocks to reduce the risk of bacterial transmission to the hands.

[0022] Another advantage of the present invention is to provide a toilet with a built-in power-free bidet system that offers an energy-efficient water spraying and cleaning operation without requiring any external energy sources, such as electricity, during each use.

[0023] Another advantage of the present invention is to provide a toilet with a built-in power-free bidet system equipped with simple components and mechanisms, such that repair or replacement of parts can be performed without specialized tools or professional assistance, which helps to keep preventive maintenance costs low.

[0024] Another advantage of the present invention is to provide a toilet with a built-in power-free bidet system that does not require complicated or expensive mechanical components or configuration, which allows the manufacturing cost to be kept to a minimum.

[0025] Another advantage of the present invention is to provide a toilet with a built-in power-free bidet system that allows the users to perform buttocks cleaning after each use, even during an electric power outage.

[0026] Another advantage of the present invention is to provide a toilet with a built-in power-free bidet system which is designed for ease of use and energy efficiency, suitable for installation in homes, public restrooms, and even off-grid locations.

[0027] Another advantage of the present invention is to provide a toilet with a built-in power-free bidet system, wherein a nozzle cap attached to a free end of the nozzle body is pushed forward from an inner edge surface of a bowl body by hydraulic force generated directly from an external water source, which causes the nozzle body to extend to a predetermined length.

[0028] Another advantage of the present invention is to provide a toilet with a built-in power-free bidet system, wherein the nozzle cap attached to the free end of the nozzle body is pulled backward by resilient force, which causes the nozzle body to return to a standby condition.

[0029] Another advantage of the present invention is to provide a toilet with a built-in power-free bidet system, wherein the nozzle cap is configured to conceal the nozzle body within a slot cavity when the nozzle body is selectively retracted to the standby condition.

[0030] Another advantage of the present invention is to provide a toilet with a built-in power-free bidet system, wherein, in the standby condition, a cross-sectional profile of an outer surface of the nozzle cap is flush with a profile surface of the inner edge surface of the bowl body, such that a smooth and uniform surface is maintained with the inner edge surface.

[0031] Another advantage of the present invention is to provide a toilet with a built-in power-free bidet system, wherein, in the standby condition, a cross-sectional dimension of the nozzle cap is slightly smaller than a cross-sectional dimension of the slot cavity, allowing the nozzle cap to be inserted into the slot cavity and positioned flush with the profile surface of the inner edge surface of the bowl body.

[0032] Additional advantages and features of the invention will become apparent from the description which follows, and may be realized by means of the instrumentalities and combinations particularly point out in the appended claims.

[0033] According to the present invention, the foregoing and other objects and advantages are attained by a power-free bidet toilet, comprising:

[0034] a toilet bowl comprising a bowl body having a top rim surface and inner edge surface;

[0035] a toilet flushing arrangement configured for flushing a water from an external water source in the bowl body of the toilet bowl;

[0036] a flushing switch located at a hand reachable position for the user sitting on the toilet bowl and configured to activate the toilet flushing arrangement to discharge the water for flushing; and

[0037] a built-in power-free bidet system, comprising:

[0038] an activation switch located at a hand reachable position for the user sitting on the toilet bowl and configured to control a supply of the water from the external water source for a buttocks-cleaning operation and a self-cleaning operation;

[0039] a water supply arrangement arranged between the toilet bowl and the external water source and configured to be controlled by the activation switch to selectively supply the water directly from the external water source for the buttocks-cleaning operation and the self-cleaning operation when the activation switch is switched on and to stop the supply of the water from the external water source when the activation switch is switched off; and

[0040] a spray assembly configured to be built in the toilet bowl and equipped with the activation switch to selectively be activated to an operation condition and spray out the water supplied from the external water source by a hydraulic force produced by the water supplied to the spray assembly to perform the buttocks-cleaning operation and the self-cleaning operation when the activation switch is switched on, and be deactivated to a standby condition to stop spraying out the water when the activation switch is switched off.

[0041] In one embodiment, the spray assembly comprises a nozzle body built in the toilet bowl and configured to be automatically extended out from the inner edge surface of the bowl body to an operation condition and to spray the water for cleaning the user's buttocks by the hydraulic force when the water supply is switched on with the activation switch, and to stop spraying the water and automatically retracted back to the inner edge surface of the toilet bowl to a standby condition by a resilient force when the water supply is switched off with the activation switch.

[0042] In one embodiment, the spray assembly further comprises a nozzle housing configured to be mounted in a predetermined position of the inner edge surface of the bowl body and slidably receive the novel body therein, wherein an inlet end of the nozzle housing is configured to connect with the water supply arrangement and an outlet end of the nozzle housing is configured to allow at least a front portion of the nozzle body, where one or more spray openings formed, to extend out of the nozzle housing in the operation condition, wherein the activation switch is switched on, the hydraulic force is produced by the water flowing into the nozzle housing from the external water source to drive the nozzle body to move to the operation condition that at least the front portion of the nozzle body is extended out of the nozzle housing and the inner edge surface of the bowl body.

[0043] In one embodiment, the resilient force is generated by at least one resilient element received in the nozzle housing and arranged to be smaller than the hydraulic force, such that when the activation switch is switched on, the hydraulic force is larger than the resilient force and drive the nozzle body to slidably move frontward to the operation condition, and that when the activation switch is switch off to stop the water supply from the external water source, the hydraulic force becomes zero and the at least one resilient element applies the resilient force to drive the nozzle body to slidably move backward to retract the nozzle body back to the standby condition.

[0044] In one embodiment, the nozzle housing comprises a first sleeve having a first passage connecting with the water supply arrangement and a second sleeve having a second sleeve communicating with the first passage coaxially and a diameter smaller than that of the first passage, wherein the first passage and the second passage are coaxially aligned to allow the water communication from the first passage to second passage. The nozzle body is slidably disposed in the second sleeve. The spray assembly further comprises a nozzle stopper mounted on the nozzle body and the at least one resilient element is arranged between an inlet end of the second sleeve and the nozzle stopper so as to produce the resilient force against the nozzle stopper to push the nozzle stopper rearward for retracting the nozzle body to the standby condition.

[0045] In one embodiment, the nozzle body is configured to have a nozzle passage coaxially connected to the second passage, wherein the water is allowed to flow from the first passage through the second passage to the nozzle passage, wherein a front portion of the nozzle body has one or more spray openings, such that the water in the nozzle passage sprays out of the nozzle body through the one or more spray openings.

[0046] In one embodiment, the resilient element of the spray assembly is embodied as a coil spring configured to retract the nozzle body to the standby condition when the activation switch is switched off.

[0047] In one embodiment, the toilet seat apparatus comprises a bidet seat hingedly arranged on the top rim surface of the toilet bowl and configured to be movable between a raised position and a lowered position relative to the top rim surface of the toilet bowl.

[0048] In one embodiment, the toilet flushing arrangement comprises a reservoir tank having a reservoir cavity therein for storing a predetermined amount of water supplied for flushing, wherein the reservoir tank is configured to receive the water from the external water source and to accommodate a plurality of internal components.

[0049] In one embodiment, the power-free bidet toilet further comprises a toilet seat device configured for providing a barrier between a user and the toilet bowl.

[0050] In one embodiment, the toilet seat device comprises a seat cover and a link assembly configured to hingedly connect the bidet seat to the seat cover and to mount on the top rim surface of the toilet bowl, wherein the link assembly comprises a mechanism configured to enable tool-less detachment of the bidet seat from the top rim surface.

[0051] In one embodiment, the nozzle body is configured to have an outer diameter slightly smaller than an inner diameter of the second sleeve, wherein a water channel is defined between an outer surface of the nozzle body and an inner surface of the second sleeve, which allows water to flow outward along the outer surface of the nozzle body.

[0052] In one embodiment, the link assembly comprises a quick-release attachment mechanism. This quick-release attachment mechanism comprises a pair of mounting members, each having a contact member located on one end of the seat cover hinged to the bidet seat, and a corresponding pair of contact pads disposed on the top rim surface of the bowl body. The contact pads are configured to detachably engage with the corresponding contact elements, enabling the seat cover and the bidet seat to be detached from the bowl body without tools by applying a moderate upward force.

[0053] In one embodiment, the link assembly comprises a frame positioned at a hinge connection between the seat cover and the bidet seat on the top rim surface. The bidet seat comprises two seat holes at one end thereof and the seat cover comprises two cover holes at one end thereof. The frame is configured with an outer pivot hole and an inner pivot hole on each side thereof, all of which are through holes aligned along a pivot axis. The bidet seat is hingedly connected to the seat cover about the pivot axis by a single shaft extending from one end of the frame to the other end of the frame passing through the two cover holes, two seat holes, two outer pivot holes and two inner pivot holes.

[0054] In one embodiment, the bidet seat is configured to hingedly connect to the seat cover about the pivot axis by two separate shafts. Each shaft extends through the corresponding cover hole, seat hole, outer pivot hole and inner pivot hole on each side of the frame.

[0055] In one embodiment, the link assembly further comprises a quick release clamping mechanism. The quick release clamping mechanism comprises a pair of protruding couplers configured to be mounted on the top rim surface of the bowl body, and a pair of locking brackets each having a bracket hole, wherein the pair of locking brackets are positioned within the frame. The pair of protruding couplers are each further configured to detachably extend into a corresponding bracket hole when the frame is mounted on the top rim surface, which enables the seat cover and the bidet seat to be securely attached to the bowl body and enables the seat cover and the bidet seat to be detached from the bowl body by applying a moderate upward force without the need for tools.

[0056] In one embodiment, the foregoing and other objects and advantages are attained by a toilet with built-in a power-free bidet system, which comprises:

[0057] a spray assembly comprising:

[0058] a nozzle housing comprising a first through slot and a second through slot having a diameter smaller than a diameter of the first through slot, comprising:

[0059] a first conduit element having a first water passage, wherein the first conduit element is disposed in the first through slot along a common coaxial axis;

[0060] a second conduit element having a second water passage, wherein the second conduit element is disposed in the second through slot along the common coaxial axis; and

[0061] a coil spring generating a resilient force; and

[0062] a nozzle device comprising:

[0063] a nozzle body configured to extend outwardly to an operation condition and retract backwardly to a standby condition, comprising:

[0064] a spray opening having:

[0065] at least one open mouth configured to be oriented upwardly on the nozzle body;

[0066] a left groove integrally formed on one side of the nozzle body;

[0067] a right groove integrally formed on an opposite side of the left groove;

[0068] a bottom groove integrally formed on a bottom surface of the nozzle body; and

[0069] at least one inner open mouth formed on an end of the second conduit element.

[0070] In one embodiment, the first conduit element has an outer diameter slightly smaller than an inner diameter of the second conduit element. In the standby condition, the first conduit element is configured to be slidably inserted into the second conduit element under the resilient force. In this configuration, the first conduit element and the second conduit element are positioned within the first through slot of the nozzle housing.

[0071] In one embodiment, the first passage has a diameter slightly smaller than a diameter of the second water passage, such that the first passage is configured to be slidably inserted into the second passage in the standby condition.

[0072] In one embodiment, the nozzle body has a nozzle passage aligned along the common axial axis, wherein the first water passage, second passage and nozzle passage are in water communication with each other.

[0073] In one embodiment, the left groove, the right groove and the bottom groove are configured to have at least one recess-shaped channel along a cross-sectional profile of the nozzle body.

[0074] In one embodiment, the nozzle passage is integrally formed to communicate water with at least one open mouth, and the second passage is integrally formed to communicate water with the at least one inner open mouth, wherein the at least one inner open mouth is provided to supply water to the left groove, the right groove and the bottom groove.

[0075] In accordance with another aspect of the invention, the present invention comprises an operation method of the built-in power-free bidet system for the toilet for cleaning buttocks of a user sitting thereon, comprising steps of:

[0076] (a) activating the nozzle body to extend outward from the inner edge surface of the bowl body by the hydraulic force when selectively activated to an operation condition after use;

[0077] (b) spraying water to clean the user's buttock through the one or more spray openings at the at least one spraying mouth of the nozzle body, and simultaneously cleaning the extending nozzle body;

[0078] (c) retracting the nozzle body by the resilient force when selectively deactivated to the standby condition; and

[0079] (d) activating the flushing operation when the buttocks-cleaning is completed.

[0080] In accordance with another aspect of the invention, the present invention comprises another operation method of the built-in power-free bidet system of the toilet for cleaning buttocks while the user sitting thereon, comprising the steps of:

[0081] (a) activating a flushing operation after use;

[0082] (b) activating a nozzle body to extend outward from an inner edge surface of a bowl body by the hydraulic force when selectively activated to an operation condition when the flushing operation is completed;

[0083] (c) spraying water to clean the user's buttocks through the one or more spraying openings at the at least one spraying mouth of the nozzle body, and simultaneously cleaning the extending nozzle body; and

[0084] (d) retracting the nozzle body by the resilient force when selectively deactivated to the standby condition.

[0085] Still further objects and advantages will become apparent from a consideration of the ensuing description and drawings.

[0086] These and other objectives, features, and advantages of the present invention will become apparent from the following detailed description, the accompanying drawings, and the appended claims.BRIEF DESCRIPTION OF THE DRAWINGS

[0087] FIG. 1 is a perspective view of a power-free bidet toilet according to a first preferred embodiment of the present invention.

[0088] FIG. 2A is a top schematic view of a container of a reservoir tank of the power-free bidet toilet according to the above preferred embodiment of the present invention.

[0089] FIG. 2B is a top partial schematic view of the container of the reservoir tank of the power-free bidet toilet according to the above preferred embodiment of the present invention.

[0090] FIG. 3 is a rear schematic view of the container of the reservoir tank of the power-free bidet toilet according to the above preferred embodiment of the present invention.

[0091] FIG. 4 is a partial schematic view of the container of the reservoir tank of the power-free bidet toilet according to the above preferred embodiment of the present invention.

[0092] FIG. 5A is a perspective view of the nozzle device of the spray assembly of the power-free bidet toilet according to the above preferred embodiment of the present invention.

[0093] FIG. 5B is a sectional view of the nozzle device of a spray assembly of the power-free bidet toilet, in the extending state, according to the above preferred embodiment of the present invention.

[0094] FIG. 5C is a sectional view of the nozzle device of a spray assembly of the power-free bidet toilet, in the retracting state, according to the above preferred embodiment of the present invention.

[0095] FIG. 6 is a schematic view of a slot cavity at a bowl body of the power-free bidet toilet according to the above preferred embodiment of the present invention.

[0096] FIG. 7A is a schematic view of a nozzle cap in a standby condition according to the above preferred embodiment of the present invention.

[0097] FIG. 7B is a schematic view of the nozzle cap in an operation condition according to the above preferred embodiment of the present invention.

[0098] FIG. 8 is a schematic view of a nozzle body of the spray assembly in the operation condition according to the above preferred embodiment of the present invention.

[0099] FIG. 9A is a schematic view of a seat cover according to the above preferred embodiment of the present invention.

[0100] FIG. 9B is a partial schematic view of the seat cover before installed according to the above preferred embodiment of the present invention.

[0101] FIG. 10 is a schematic view of the seat cover after installed according to the above preferred embodiment of the present invention.

[0102] FIG. 11 is a schematic view of a water spraying condition according to the above preferred embodiment of the present invention.

[0103] FIG. 12 is a perspective view of a toilet seat device according to an alternative mode of the above preferred embodiment of the present invention.

[0104] FIG. 13A is a perspective view of a frame of a link assembly according to the alternative mode of the first preferred embodiment of the present invention.

[0105] FIG. 13B is a bottom perspective view of the frame of the link assembly according to the alternative mode of the above preferred embodiment of the present invention.

[0106] FIG. 14 is a partial perspective view of the frame of the link assembly according to the alternative mode of the above preferred embodiment of the present invention.

[0107] FIG. 15 is a schematic view of a spray assembly of a power-free bidet toilet according to another preferred embodiment of the present invention.

[0108] FIG. 16 is a schematic view illustrating a nozzle housing and a nozzle device of the spray assembly of the power-free bidet toilet according to the above another preferred embodiment of the present invention.

[0109] FIG. 17 is a partial cross-sectional view of a hollow sleeve of the nozzle housing of the spray assembly of the power-free bidet toilet according to the above another preferred embodiment of the present invention.

[0110] FIG. 18A is a partially cross-sectional view of the nozzle assembly of the spray assembly of the power-free bidet toilet, illustrating in the standby condition, according to the above another preferred embodiment of the present invention.

[0111] FIG. 18B is a partially cross-sectional view of the nozzle assembly of the spray assembly of the power-free bidet toilet, illustrating in the operation condition, according to the above another preferred embodiment of the present invention.

[0112] FIG. 19A an enlarged view illustrating a spray opening of the nozzle device of the spray assembly of the power-free bidet toilet according to the above another preferred embodiment of the present invention.

[0113] FIG. 19B is a cross-sectional view of a nozzle body of the nozzle device of the spray assembly of the power-free bidet toilet according to the above another preferred embodiment of the present invention.

[0114] FIG. 20 is a partial sectional view illustrating water passages of the nozzle device of the power-free bidet toilet according to the above another preferred embodiment of the present invention.

[0115] FIG. 21 is a partial sectional view illustrating the spray opening connected to the water passages of the nozzle device of the power-free bidet toilet according to the above another preferred embodiment of the present invention.

[0116] FIG. 22 is another perspective view of the power-free bidet toilet according to the above another preferred embodiment of the present invention.

[0117] FIG. 23A is a schematic view of the power-free bidet toilet, illustrating the nozzle housing and nozzle device embedded into a toilet bowl and the water supply arrangement arranged in the water tank according to the above another preferred embodiment of the present invention.

[0118] FIG. 23B a top schematic view of the power-free bidet toilet, illustrating the nozzle housing and nozzle device embedded into a toilet bowl and the water supply arrangement arranged in the water tank according to the above another preferred embodiment of the present invention.

[0119] FIG. 23C is a partial schematic view illustrating the nozzle housing and nozzle device inserted into the toilet bowl of the power-free bidet toilet according to the above another preferred embodiment of the present invention.

[0120] FIG. 24A is a cross-sectional view of the nozzle housing and nozzle device of the spray assembly of the power-free bidet toilet in standby condition according to the above another preferred embodiment of the present invention.

[0121] FIG. 24B is a cross-sectional view of the nozzle housing and nozzle device of the spray assembly of the power-free bidet toilet in operation condition according to the above another preferred embodiment of the present invention.

[0122] FIG. 25A is a partially sectional schematic view of the power-free bidet toilet in standby condition according to the above another preferred embodiment of the present invention.

[0123] FIG. 25A is a partially sectional schematic view of the power-free bidet toilet in operation condition according to the above another preferred embodiment of the present invention.

[0124] FIG. 26 is a block diagram illustrating an operation method according to the above preferred embodiments of the present invention.

[0125] FIG. 27 is a block diagram illustrating an alternative operation method according to the preferred embodiments of the present invention.DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

[0126] The following description is disclosed to enable any person skilled in the art to make and use the present invention. Preferred embodiments are provided in the following description only as examples and modifications will be apparent to those skilled in the art. The general principles defined in the following description would be applied to other embodiments, alternatives, modifications, equivalents, and applications without departing from the spirit and scope of the present invention.

[0127] In the description of the present invention, unless explicitly stated otherwise and qualified, terms such as “connected,”“attached,” and “fixed” should be construed broadly. For instance, these terms may indicate a permanent connection or a detachable one, or they may refer to a whole unit. They can signify a mechanical linkage, an electrical connection, direct coupling, or indirect interaction through an intermediary medium. Whether these terms imply an internal connection between two elements or an interactive relationship between them will depend on the specific context and the understanding of those skilled in the art.

[0128] Throughout this invention, unless explicitly stated otherwise and qualified, when the first feature is described as being “above” or “below” the second feature, this may entail direct physical contact between the two features. Alternatively, it may signify that the first and second features are not in direct contact but are linked through the involvement of additional features. Additionally, the description of the first feature being “above,”“over,” or “on top of” the second feature includes scenarios where the first feature is positioned directly above or diagonally above the second feature or simply means that the first feature is situated at a higher horizontal level than the second feature. Conversely, when the first feature is referred to as “below,”“under,” or “beneath” the second feature, it encompasses cases where the first feature is directly below or diagonally below the second feature or simply implies that the first feature's horizontal height is less than that of the second feature.

[0129] In this embodiment's description, terms such as “up,”“down,”“right,” and “left” are used to describe orientations or positional relationships. These descriptions are based on the orientations or positions depicted in the drawings and are employed for ease of explanation and simplification of operation. They should not be construed as indications or implications that the device or element being discussed must possess a specific orientation, be constructed in a particular manner, or operate exclusively in a certain orientation. Furthermore, terms such as “first” and “second” are employed solely for the purpose of distinction in the description and do not carry any particular significance.

[0130] Referring to FIG. 1 of the drawings, according to a preferred embodiment of the present, a power-free bidet toilet 1 with built-in power-free bidet system is illustrated, wherein the power-free bidet toilet 1 comprises a toilet flushing arrangement 10, a toilet seat device 2, a toilet bowl 3, and a built-in power-free bidet system 4.

[0131] The toilet bowl 3 comprises a bowl body 30 connected to a waste outlet and configured to receive and discharging a flushing water to the waste outlet 3001. The toilet flushing arrangement 10 is configured for flushing the flushing water from an external water source to the toilet bowl 3. The toilet seat 2 is configured to provide an apparatus for a user to prevent the user from directly contacting the toilet bowl 3 when using the power-free bidet toilet 1, which minimizes a risk of bacterial transmission and maintains a hygienic environment. The power-free bidet toilet 1 further comprises a flushing switch 13 located at a hand reachable position for the user who sits on the toilet bowl 3 and configured to activate toilet flushing arrangement to discharge the water for flushing.

[0132] Referring to FIG. 1 and FIG. 5A, the built-in power free bidet system 4 comprises an activation switch 14 located at a hand reachable position for the user who sits on the toilet bowl 3 and configured to activate a buttocks-cleaning operation and a self-cleaning operation, a water supply arrangement 40 and a spray assembly 50.

[0133] The water supply arrangement 40 is configured for supplying the water directly from the external water source for flushing and cleaning, wherein the water supply is initiated when selectively activating to an operation condition and is stopped when selectively deactivating to a standby condition.

[0134] The spray assembly 50 is configured to be built-in the toilet bowl 3 and equipped with the activation switch 14 to directly supply the water from the external water source by a hydraulic force to perform the buttocks-cleaning operation and the self-cleaning operation when the activation switch 14 is activated to perform the buttocks-cleaning operation.

[0135] According to the preferred embodiment, referring to FIG. 1 and FIG. 2A, the toilet flushing arrangement 10 comprises a reservoir tank 11 for storing a predetermined amount of the flushing water supplied from the external water source and a toilet flush valve assembly 130 installed in the reservoir tank 11 for flushing the flushing water stored in the reservoir tank 11 into the bowl body 30 of the toilet bowl 3. The reservoir tank 11 comprises a container 12 for receiving the water from the external water source through the water supply arrangement 40 to store therein for flushing to the bowl body 30 when the flushing switch 13 is activated and accommodating a plurality of internal components therein. The container 12 comprises a bottom wall 122 and a surrounding wall 123 upwardly extending from the bottom wall 122 to define a receiving cavity 121 therebetween and an opening 120 communicating with outside. The reservoir tank 11 may further comprise a container lid 111 configured to cover the opening 120 of the container 12.

[0136] According to the preferred embodiment, the flushing switch 13 is embodied as a flush handle pivotally mounted on one outer side of the container 12 of the reservoir tank 11 and equipped with the toilet flush valve assembly 130 for being switching by the user to activate a flushing of the flushing water stored in the receiving cavity 121 of the container 12 by means of the toilet flush valve assembly 130 (as shown in FIG. 2A). The activation switch 14 is embodied as an activation switch 14 provided on another outer side of the container 12 of the reservoir tank 11 for being switching by the user sitting on the toilet bowl 3 to activate the buttocks-cleaning operation and the self-cleaning operation of the built-in power-free bidet system 4.

[0137] The flushing switch 13 is provided for controlling a flushing operation to by discharge the flushing water from the receiving cavity 121 into the bowl body 30 for flushing when being selectively activated, and the activation switch 14 is provided for controlling the buttocks-cleaning operation by activating the spray assembly 40 to spray water directly from the external water source for buttocks cleaning when being selectively activated.

[0138] It can be understood that the flushing and activation switches 13, 14 are respectively configured to supply water for flushing and cleaning when being selectively activated, and to stop supplying water when being selectively deactivated.

[0139] Referring to FIG. 1 and FIG. 6, the toilet bowl 3 further comprises a toilet base 300 integrally provided below the bowl body 30 and adapted to be mounted on a ground surface around the waste outlet. The toilet base 300 has a discharge hole 3001 adapted to connect with the waste outlet. The bowl body 30 has a curved surrounding wall 3002 extending upward from the toilet base 300 to a top surface thereof defining an upper buttocks-contour opening 31, a lower bowl outlet 330 communicating with the discharge hole 3001 through the toilet base 300 and a bowl shaped water collection chamber 32 formed between the buttocks-contour opening 31 and the bowl outlet 330. As shown in FIG. 6, the bowl body 30 has an inner edge surface 302 formed along an inner top edge of the surrounding wall 3002 and a top rim surface 303 formed around the buttocks-contour opening 31 and positioned above the inner edge surface 302.

[0140] The bowl outlet 330 provided to communicate to the waste outlet is configured for allowing human waste and residue received from the water collection chamber 32 to reach the waste outlet when flushing.

[0141] Referring to FIG. 1, and FIGS. 9A to 10, the toilet seat 2 comprises a toilet seat device 20 and a seat cover 21 mounted on the bowl body 30 and positioned in front of the container 12 and above to the water collection chamber 32. The toilet seat deice 20 comprises a bidet seat 23 hingedly connected to one end of the seat cover 21 through a link assembly 22 mounted on the top rim surface 303 to form a hinged unit.

[0142] Referring to FIG. 9A to FIG. 10, the link assembly 22 comprises a quick-release attachment mechanism 230 comprising a pair of the mounting members 231 and a pair of contact pads 232. Each mounting member 231 comprises a contact element 2311 fixed on one end thereof. The corresponding pair of contact pads 232 is disposed on the top rim surface 303 in front of the container 12. The opposite end of each mounting member 231 is pivotally connected between the seat cover 21 and the bidet seat 23, allowing for hinged movement.

[0143] It can be understood that the pair of mounting members 231 is respectively hingedly connected along the end of the seat cover 21 at a predetermined interval, such that an interval between the corresponding contact pads 232 disposed on the top rim surface 303 is embodied to be equal to the predetermined interval of the pair of mounting members 231.

[0144] It can be understood that the contact elements 2311 of the pair of mounting members 231 are configured to detachably engage with the corresponding contact pads 232. Such attachment occurs when the seat cover 21 is selectively either closed over the bidet seat 23 on the top rim surface 303, or opened toward the container 12 (with or without the bidet seat 23), as shown in FIG. 1.

[0145] It is appreciated that the corresponding contact pads 232 are configured to allow the contact elements 2311 to be manually detached therefrom simply by applying a moderate upward force, without the need for tools. In other words, the seat cover 21 and the bidet seat 23 can be detached from the top rim surface 303 in a tool-free manner by applying the upward force.

[0146] According to the preferred embodiment of the present invention, the quick-release attachment mechanism 230 can be embodied as one selected from the group consisting of magnetic mounts, adhesive mounts and other types of quick-release attachment mechanisms.

[0147] Referring to FIG. 12 to FIG. 14, and FIG. 22, an alternative mode of the toilet seat device 20 according to the preferred embodiment of the present invention is illustrated. The alternative subject matter of the first alternative mode is the link assembly 22′, which comprises a quick release clamping mechanism 220 comprising a frame 221 for connecting the seat cover 21 to the bidet seat 23. The frame 221 is configured to be positioned at a hinge connection between the seat cover 21 and the bidet seat 23 on the top rim surface 303′ of the bowl body 30′ as shown in FIG. 22.

[0148] As shown in FIG. 13A, the frame 221 is integrally configured with a base wall 2214 extending upward to a top wall 2211 and enclosed by a first body wall 2212, a second body wall 2213, and two outer walls 2215 opposite each other. The first and second body walls 2212, 2213 are longer than the two outer walls 2215.

[0149] The frame 221 has an open cavity 2217 formed within a central portion thereof, beneath the top wall 2211. The open cavity 2217 has a box-shape and defines inner surfaces of the two outer walls 2215 and surfaces of two inner walls 2216 facing each other.

[0150] Each of the two outer walls 2215 has an outer pivot hole 224 formed therein and each of the two inner walls 2216 has an inner pivot hole 2241 formed therein, all of which are through holes aligned along a pivot axis X-X′, as shown in FIG. 12.

[0151] The bidet seat 23 further comprises two seat wings 233 extending outward from an end portion thereof and are positioned at the hinge connection between the seat cover 21 and the bidet seat 23, wherein each seat wing 233 has a seat hole 2331 formed therein, wherein the two seat holes 2331 are through-holes aligned along the pivot axis X′-X, as shown in FIG. 12.

[0152] The seat cover 21 correspondingly comprises two cover wings 211 extending inward from two end portions thereof respectively and are positioned at the hinge connection between the seat cover 21 and the bidet seat 23, wherein each cover wing 211 has a cover hole 2111, and the two cover holes 2111 are through-holes aligned along the pivot axis X′-X.

[0153] It can be understood that a predetermined distance between the two cover wings 211 is slightly greater than a predetermined distance between outer surfaces of the two seat wings 233, such that the two seat wings 233 can be accommodated between the two cover wings 211.

[0154] Referring to FIG. 12 and FIG. 13B, according to the alternative mode, a length of the frame 221 is slightly smaller than the predetermined distance between the outer surfaces of the two seat wings 233, such that the frame 221 can be accommodated between the two seat wings 233.

[0155] It is worth mentioning that the two cover holes, the two seat holes 2331, the two outer pivot holes 224, and the two inner pivot holes 2241 are aligned along the pivot axis X′-X.

[0156] According to the alternative mode, the bidet seat 23 is hingedly connected to the seat cover 21 about the pivot axis X′-X by a shaft 210 that pivotally extends through the cover hole 2111, the seat hole 2331, the outer pivot hole 224 and the inner pivot hole 2241 on each side of the frame 221, as shown in FIG. 12 and FIG. 13A.

[0157] In the other word, the shaft 210 is an elongated member configured to be extended through a series of aligned holes, which are the cover holes, the seat holes 2331, the outer pivot holes 224 and the inner pivot holes 2241. Specifically, the shaft 210 passes through the cover hole 2111 and the seat hole 2331, then through the outer pivot hole 224 and the inner pivot hole 2241 on one side of the frame 221. Then, the shaft 210 continuously extends through the inner pivot hole 2241 and the outer pivot hole 224 on an opposing side of the frame 2211 and finally passes through the seat hole 2331 and the cover hole 2111.

[0158] Alternatively, it is worth mentioning that the bidet seat 23 can be hingedly connected to the seat cover 21 about the pivot axis X′-X by two separate shafts 210′, each extends along one side of the frame 221. In other words, the two shafts 210′ extend through the cover holes 2111, the seat holes 2331, the outer pivot holes 224, and the inner pivot holes 2241 on the one side and the opposing side of the frame 221 respectively.

[0159] Referring to FIGS. 12 to 14, and 22, the quick-release clamping mechanism 220 is configured to allow a tool-free detachment of the bidet seat 23 from the top rim surface 303′ of the bowl body 30′. The bidet seat 23 is hingedly connected to the seat cover 21 to form a hinged unit. The quick-release clamp mechanism 220 further comprises a pair of protruding couplers 222 and a pair of locking brackets 223 that are detachably engaged with the pair of the protruding couplers 222.

[0160] The pair of the protruding couplers 222 is configured to be mounted within a pair of corresponding mounting channels 3031 formed on the top rim surface 303′ respectively. Each of the protruding couplers 222 extends through the two corresponding mounting channels 3031 from the top rim surface 303′ to an opposite side of the top rim surface 303′. wherein a length of each protruding couplers 222 exceeds a thickness T of the rim, wherein the thickness T is defined between the top rim surface 303′ and the opposite side of the top rim surface 303′ (as shown in FIG. 13A).

[0161] The frame 221 further comprises a pair of receiving chambers 2210 disposed in two opposite sides thereof respectively. Each receiving chamber is defined between the outer wall 2215 and the inner wall 2216 and is configured to accommodate the locking bracket 223 therein. Each locking bracket 223 is positioned on an inner surface of the base wall 2214 of the frame 221. Each locking bracket 223 has a bracket hole 2231 extending from a central hole of the locking bracket 223 to an outer surface of the base wall 2214, passing through a cushion member 2232, which is disposed between the base wall 2214 and the top rim surface 303′, when the frame 221 is mounted on the top rim surface 303′.

[0162] Please note that each protruding coupler 222 is configured to detachably extend into the corresponding bracket hole 2231 of the respective locking bracket 223 when the frame 221 is mounted on the top rim surface 303′.

[0163] When the frame 221 is mounted on the top rim surface 303′ (as shown in FIG. 22), each protruding coupler 222 comprises a securing member 2221 configured to engage and reduce a gap between the top rim surface 303′ and the frame 221 to prevent an axial displacement and unintentional loosening of the frame 221 during use. Accordingly, the bidet seat 23 hinged to the seat cover 21 is configured to be detachably removed from the top rim surface 303′ of the bowl body 30 by applying a moderate upward force without the use of any tool.

[0164] In view of the above described preferred embodiment and its alternative mode, referring to FIG. 1, it is appreciated that debris and residue accumulated in connection gaps between the seat cover 21, the bidet seat 23, and the top rim surface 303 can be thoroughly cleaned after the bidet seat 23 and the seat cover 21 are detached from the top rim surface 303.

[0165] The bidet seat 23 is capable of pivotally flipping downward about the link assembly 22 to a lower position and sit on the top rim surface 303 of the bowl body 30, or pivotally flipping upward about the link assembly 22 to a raised position and rest against the seat cover 21. In other words, the bidet seat 23 is configured to be movable between a raised position and a lowered position relative to the top rim surface 33 of the bowl body 30. Also, the seat cover 21 is capable of pivotally flipping downward about the link assembly 22 to rest on the bidet seat 23 sitting on the bowl body 30 to cover the buttocks-contour opening 31 of the bowl body 30, or pivotally flipping upward about the link assembly 22 to rest against the container 12 of the reservoir tank 11.

[0166] Referring to FIG. 1 to FIG. 4, the water supply arrangement 40 is arranged to supply water directly from the external water source to the receiving cavity 121 of the container 12 for flushing and cleaning. The water supply arrangement 40, which is configured to be connected with the external water source via one or more inlet conduits for delivering water from the external water source, comprises a first hose 41, a second hose 42, a tee adapter 43, and a shut off valve 44.

[0167] The shut off valve 44 is arranged between the conduit and the tee adapter 43 to control a first water flow into the receiving cavity 121 of the container 12 through the first hose 41 for flushing and a second water flow through the second hose 42 for cleaning.

[0168] Preferably, the shut off valve 44 is remained in an open state so that the water is supplied at any time to ensure a predetermined amount of water stored in the receiving cavity 121 while the water is also supplied at any time for cleaning in a standby state.

[0169] As shown in FIG. 2A, toilet flush valve assembly 130 of the toilet flushing arrangement 10 comprises a link element 131, a flapper 132 and an actuator module 133. The actuator module 133 is accommodated in the container 121 and pivotally connected to the flushing switch 13 and configured to actuate the flapper 132 through the link element 131 within the receiving cavity 121. The flapper 132 is opened to deliver the water from the receiving cavity 121 to the water collection chamber 32 through the link element 131 for flushing when the flushing switch 13 selectively triggers the actuation module 133.

[0170] It should be noted that the actuation module 133 can be a mechanical assembly configured to transmit pivoting force from the flushing switch 13 to the flapper 132 through the link element 131 to activate the flushing.

[0171] The container 12 further comprises an inlet valve 134 for controlling the first water flow flowing directly from the external water source into the receiving cavity 121 through the first hose 41 after each actuation of the flushing switch 13, wherein the inlet valve 134 is selectively opened to allow the water from the external water source to flow directly into the receiving cavity 121 after each flushing to refill the container 121 with the flushing water in the receiving cavity 121, and the inlet valve 134 is selectively closed to prevent water from entering once the predetermined amount of water in the receiving cavity 121 has been received and stored in the receiving cavity 121 of the container 12.

[0172] As shown in FIG. 2B, the water supply arrangement 40 further comprises a third hose 45 and an adapter unit 46 arranged in the receiving cavity 121, which is pivotally connected to the activation switch 14 of the built-in power-free bidet system 4, wherein one end of the adapter unit 46 is connected to the second hose 42 and another end of the adapter unit 46 is connected to one end of the third hose 45. As shown in FIG. 4, the water supply arrangement 40 further comprises a gasket ring 451 and a housing stopper 452, wherein an opposite end of the third hose 45 is connected to the gasket ring 451 which is positioned on an outer position of the bottom wall of the container 12.

[0173] The adapter unit 46 is configured to allow the water to flow directly from the external water source through the second hose 42 and the third hose 45 to the first gasket ring 451 when the activation switch 14 is selectively activated to trigger the adapter unit 46 to an operation condition. When the activation switch 14 is selectively deactivated to return the adapter unit 46 to a standby condition, the water is prevented from flowing from the second hose 42 to the gasket ring 451.

[0174] As shown in FIG. 4, in one embodiment, the third hose 45 is configured to extend downward from the adapter unit 46, pass through the gasket ring 451, and subsequently extend to a top rear side of the bowl body 30 through the sleeve stopper 452.

[0175] According to the preferred embodiment, the gasket ring 451 is shaped and sized to fittingly and sealingly cover a through hole that extends from an inner surface to an outer surface of the bottom wall 122 of the container 12. The housing stopper 452 is shaped and sized to fittingly and sealingly cover a slot cavity 301, extending from an outer surface to an inner surface of the top rear side of the bowl body 30, as shown in FIG. 4. Also, both the gasket ring 451 and the housing stopper 452 have through holes that are shaped and sized to receive the third hose 45, such that the third hose 45 is fittingly and sealingly embedded therein.

[0176] Referring to FIG. 5A to FIG. 5C, the spray assembly 50, which is configured to provide water directly from the external water source to perform a sanitary cleaning, comprises a nozzle housing 51 and a nozzle device 52.

[0177] The nozzle housing 51 comprises a first sleeve 511 having a first passage 5110, and a second sleeve 512 having a second passage 5120 having a second diameter smaller than a first diameter of the first passage 5110. The first sleeve 511 is internally connected with the second sleeve 512 to form the nozzle housing 51 while the second passage 5120 is coaxially aligned with the first passage 5110, allowing the water to flow through the first and second passages 5110, 5120. Alternatively, the first sleeve 511 and the second sleeve 512 can be made of plastic material integrally to form an integral tubular body (as shown in FIG. 18A).

[0178] In other embodiment, the second sleeve 512 may also be configured to allow slidably moving within the first sleeve 511, such that a portion of the second sleeve 512 is coaxially and slidably inserted in the first sleeve 511 and the second passage 5120 extends in and aligns with the first passage 5110 for allowing the water continuously flowing through the first passage 5119 and the second passage 5120, even during a sliding movement of the second sleeve 512 relative to the first sleeve 511.

[0179] The nozzle device 52 comprises a nozzle body 521 which is a tubular body having a nozzle passage 5210 coaxially extended therethrough and an outer diameter equal to or slightly smaller than the second diameter of the second passage 5120 of the second sleeve 512. The nozzle body 521 has an outlet end and an inlet end and is configured to fittingly insert through the second sleeve 5120 until the inlet end thereof is positioned in the first passage 5110, such that the nozzle body 521 is capable slidably and coaxially sliding in the second passage 5120. The nozzle body 521 has one or more spray openings 522 radially formed at a position adjacent to the outlet end of the nozzle body 521 to communicate the nozzle passage 5210 with outside. The nozzle device 52 further comprises a ring-shape nozzle stopper 523, having a diameter smaller than the first passage 5110 and larger than the second passage 5210, secured to the inlet end of the nozzle body 521 and a nozzle cap 524, having a diameter larger than a second sleeve 512, mounted to the outlet end of the nozzle body, such that the water flowing through the first, second and nozzle passages 5110, 5120, 5210 is guided to spray out through the one or more spray openings 522 and the slidable movement of nozzle body 521 in the second passage 5120 is limited to an extending state when the nozzle body 521 is extended out of the second sleeve 512 until the nozzle stopper 523 is stopped by the inlet end of the second sleeve 512, and a retracting state when the nozzle body 521 is in the standby condition that the nozzle body 521 is retracted in the second sleeve 512 until the nozzle cap 524 is stopped by the outlet end of the nozzle housing 511. To enhance the spraying nozzle effect, at least one spraying mouth 5221 is indented in an upper side of the nozzle body 521 and adjacent to the outlet end of the nozzle body 521 and the one or more spray openings 522 is formed at the at least one spraying mouth 5221 for cleaning purposes.

[0180] According to the preferred embodiment, a predetermined length L2 of the nozzle body 521 is longer than a predetermined length L1 of the second sleeve 512, such that at least a portion of the nozzle body 521 near the outlet end and where the one or more spray openings 522 located can be extended out of the second sleeve 512 until the nozzle stopper 523 secured at the inlet end of the nozzle body 521 is stopped by an end stopper wall of the second sleeve 512, as shown in FIG. 5B and FIG. 5C.

[0181] The nozzle body 521 is coaxially aligned and communicated with the first sleeve 511 and the second sleeve 512. The one or more spray openings 522 are in water communication with the nozzle passage 5210, such that the water can flow from the external water source through the first sleeve 511 into the nozzle passage 5210 and spray out through the at least one spraying mouth 5221 of the spray opening 522. As shown in FIG. 5A, according to the preferred embodiment, the at least one spraying mouth 5221 is embodied to have V shape that forms a forward slant spray surface 52211 inclined upwardly and rearwardly and a backward slant spray surface 52212 inclined upwardly and frontwardly, wherein the one or more spray openings are spraying nozzle holes spacedly formed in either or both the forward slant spray surface 52211 and the backward slant spray surface 52212.

[0182] Referring to FIG. 5B and FIG. 5C, the nozzle stopper 523 has an outer diameter larger than the diameter of the second passage 5120 of the second sleeve 512 and slightly smaller than the diameter of the first passage 5110 of the first sleeve 511. In addition, the spray assembly 50 further comprises a resilient element 53, such as a coil spring having an inner diameter larger than the outer diameter of the nozzle body 521 and an outer diameter smaller than the diameter first passage 5110, arranged to produce a resilient force F2 against the nozzle stopper 523 to push the nozzle stopper 523 rearward for retracting the nozzle body 452 to the standby condition. According to the preferred embodiment, the resilient element 53 is arranged within the first passage 5110 and disposed around the nozzle body 521 so as to position between the nozzle stopper 523 and an end of the second sleeve 512 and apply the resilient force F2 against the nozzle stopper 523 to push the nozzle stopper 523 toward the housing stopper 452, as shown in FIG. 5C. Generally, the water pressure supplied from external water source is 40 psi to 60 psi. The resilient force F2 is preferred to be less than the water pressure, that is less than 40 psi.

[0183] As shown in FIG. 5B, when the nozzle stopper 523 is affixed at the inlet end of the nozzle body 52, an outer surface 5231 of the nozzle stopper 523 facing the housing stopper 452 within the first passage 5110 is large enough to generate a hydraulic force F1 formed by the water pressure of the water flowing in from the third hose 45 connected to the housing stopper 452, as shown in FIG. 5B, and exerted on the outer surface 5231 of the nozzle stopper 523 toward the outlet end of the nozzle body 52. Accordingly, when the activation switch 14 is activated to supply water from the external water source to the spray assembly, the hydraulic force F1 will be at least 40-60 psi applying to the nozzle stopper 523 toward the outlet end of the nozzle body 52. Since the hydraulic force F1 is larger than the resilient force F2, the hydraulic force F1 presses the nozzle stopper 523 to move away from the housing stopper 452 in a frontward direction and compress the resilient element 53, and thus drives the a predetermined length of a front portion of the nozzle body 521 slidably moving out of the nozzle housing 51 until the at least spraying mouth 5221 and the one or more spray openings 522 are exposed to outside.

[0184] When activation switch 14 is switched off and the water supplied from the external water source ceases flowing to the spray assembly 50, the water pressure in the first sleeve 511 and in static state and the hydraulic force F1 is zero, the resilient force F2 automatically pushes the nozzle stopper 523 toward the housing stopper 452 and drives the nozzle body 521 to slidably move backwards until the nozzle cap 524 pressing against the second sleeve 512, as shown in FIG. 5C, so to retract the front portion of the nozzle body 521 within the second passage 5120 to conceal the at least one spraying mouth 5221 and the one or more spray openings 522 in the nozzle housing 51.

[0185] It is worth mentioning that the nozzle cap 524 of the nozzle device 52 is detachably fastened, e.g. by screwing, to close the outlet end and the nozzle passage 5210 of the nozzle body 521 and to form a limiting cap to restrict the inward movement of the nozzle body 521 with respect to the nozzle housing 51.

[0186] Accordingly, the nozzle stopper 523 of the nozzle assembly 50 functions as a piston relative to the first sleeve 511 to selectively move in the frontward and backward directions by means of the hydraulic force F1 and the resilient force F2 without the requirement of any electric power. It is appreciated that, while the nozzle stopper 523 working as a piston in response to the hydraulic force F1 and the resilient force F2, the water supplied from the external water source is capable of flowing from the third hose 45 to the one or more spraying openings 522 via the first passage 5110 and the nozzle passage 5210. Further, an annular passage 5121 is preferred to be defined between an outer surface of the nozzle body 521 and an inner surface of the second sleeve 512, forming a ring-shape cavity surrounding the nozzle body 521 in the second passage 5120 of the second sleeve 512 and allowing water to flow from the first passage 5110 into the annular passage 5121, so that the water supplied from the external water source can also flow in the annular passage 5121 to self-cleaning the outer surface and the at least one spraying mouth 5221 of the nozzle body 521.

[0187] It is worth mentioning that, according to the preferred embodiment, the nozzle cap 524 can be unfastened and detached from the nozzle body 521, such that the user may disassemble the spray assembly 50 and clean the nozzle housing 51, the nozzle device 52 and the resilient element 53 from time to time.

[0188] According to the preferred embodiment, please note that a cross-sectional area of the nozzle passage 5210 of the nozzle body 521 is larger than a cross-sectional area of the annular passage 5121, such that the water flow entering the first sleeve 511 which is directly supplied from the external water source through the adapter unit 46 (shown in FIG. 2B) to the nozzle passage 5210 and the annular passage 5121. In other words, a volume of water flowing into the nozzle passage 5210 is arranged to be much greater than a volume of water flowing into the annular passage 5121.

[0189] Referring to FIGS. 1 to 2B, 5A and 6 to 8, more particularly, as mentioned above, the resilient element 53 is embodied as the coil spring, wherein one end of the coil spring 53 is detachably secured to a top surface of the nozzle stopper 523, and the opposite end is fixedly attached to an inner wall of the first sleeve 511 adjacent to the housing stopper 452. The coil spring 53 is adapted to retract the nozzle body 521 to the standby condition when the activation switch 14 is selectively deactivated.

[0190] It should be noted that the selective deactivation of the activation switch 14 stops the activation of the adapter unit 46 to terminate the supply of water from the external water source to the nozzle body 521. In other words, the resilient element 53 is designed to allow the nozzle stopper 523 to be pushed backward toward the housing stopper 452 to the standby condition when the activation switch 14 is selectively deactivated.

[0191] Please be reminded again that since the resilient element 53 is configured to generate the resilient force F2 less than the hydraulic force F1 produced by the direct water from the external water source through the adapter unit 46, when the activation switch 14 is selectively switched to activate the adapter unit 46, the predetermined length of the front portion of the nozzle body 521 is extended out of the second sleeve 512 by the hydraulic force F1.

[0192] Referring to FIG. 4, and FIG. 6 to FIG. 8, corresponding to the spray assembly 50 disclosed above, the slot cavity 301 is preferred to be positioned adjacent to a rear side of the inner edge surface 302 right above the bowl outlet 330. In other words, the slot cavity 301 is embodied as a through hole extending from the inner edge surface 302 to a rear side of the bowl body 30 and shaped and sized to receive the nozzle housing 51 in a fittingly embedded manner, wherein the housing stopper 452 is sized to conceal the slot cavity 301 at the top rear side of the bowl body 30 (as shown in FIG. 4).

[0193] It is worth further mentioning that the nozzle housing 51 is configured to have the nozzle body 521 facing the inner edge surface 302 at one end thereof, and the first sleeve 511 facing the housing stopper 452 at the other end thereof. The first sleeve 511 is connected to the third hose 45 through the housing stopper 452, allowing the water from the external water source to flow through the first passage 5110, the second passage 5120 and the nozzle passage 5210 to spray out through the one or more spray openings 522 of the nozzle body 521.

[0194] Also, the nozzle cap 524 is shaped and sized to conceal the nozzle body 521 within the slot cavity 301 when the nozzle body 521 is selectively retracted to the standby condition. In this standby condition, a cross-sectional profile of an outer surface of the nozzle cap 524 will be flushed with a profile surface of the inner edge surface 302 of the bowl body 30, such that a smooth and uniform surface is maintained with the inner edge surface 302.

[0195] Further, a cross-sectional dimension of the nozzle cap 524 is preferred to be slightly smaller than a cross-sectional dimension of the slot cavity 301, allowing the nozzle cap 524 to be inserted into the slot cavity 301 and positioned flush with the profile surface of the inner edge surface 302 when in the standby condition.

[0196] In the operation condition, at least the front portion of the nozzle body 521 extends out of the slot cavity 301 by the hydraulic force F1 when the activation switch 14 is selectively switched to activate the adapter unit 46 to allow water to flow directly from the external water source to the nozzle body 521, as shown in FIG. 3, FIG. 5A and FIG. 8.

[0197] Furthermore, referring to FIG. 5A to FIG. 11, in the operation condition, the at least one spraying mouth 5221 is oriented upwardly on the extended nozzle body 521 in such a manner that the one or more spray openings 522 are capable of spraying water upwards in a predetermined inclined angle to clean a target area of the buttocks of the user sitting on the bowl body 30 of the toilet bowl 3 for the removal of human waste according to the manufacturer's specification.

[0198] In other words, in the operation condition, the water is primarily distributed to the at least one spraying mouth 5221, while the remaining volume of the water is directed to the annular passage 5121. The remaining water from the annular passage 5121 is utilized to clean and remove any debris and residues on the extended nozzle body 521 through the hydraulic force F1.

[0199] Also, in the standby condition, a predetermined dimension of the spray assembly 50 is smaller than a predetermined dimension of the slot cavity 301, such that the assembly 50 is fully concealed within the slot cavity 301.

[0200] It should be noted that, in the operation condition, the nozzle stopper 523 is coaxially pushed forward within the first passage 5110 of the first sleeve 511 by the hydraulic force F1 when the activation switch 14 is selectively switched to activate the spray assembly 5. In the standby condition, the nozzle stopper 523 is coaxially pushed backward toward the housing stopper 452 by the resilient force F2 generated by the resilient element 53 when the activation switch 14 is selectively switched to deactivate.

[0201] It is worth mentioning that, according to the preferred embodiment of the present invention, the spray assembly 50 may comprise more than one unit within a single bidet toilet to enhance cleanliness, depending on manufacturer's specifications.

[0202] According to the preferred embodiment of the present invention, an operation of buttock cleaning and cleaning nozzle body 521 is driven by the hydraulic force F1, which offers an energy-friendly water spraying and cleaning operation without any external energy sources, such as electricity. The buttock cleaning and cleaning nozzle body 521 can be operated as usual in the event of a power outage. The power-free bidet toilet 1 equipped with the built-in power-free bidet system of the present invention is configured with simple components and mechanisms, allowing repairs or part replacements to be performed without specialized tools or professional assistance, which helps to keep preventive maintenance costs low, avoiding complicated or costly mechanical components or configuration, which allows the manufacturing cost to remain low. The power-free bidet toilet 1 is designed for ease of use and energy efficiency, making it suitable for installation in homes, public restrooms, and off-grid locations.

[0203] Referring to FIG. 26, according to the preferred embodiment of the present invention, an operation method of a built-in power-free bidet system for a power-free bidet toilet 1 for cleaning buttocks of a user sitting thereon, comprising steps of:

[0204] (a) activating the nozzle body 521 to extend outward from the inner edge surface 302 of the bowl body 30 by the hydraulic force F1 when selectively activated to the operation condition after use;

[0205] (b) spraying water to clean the user's buttock through the one or more spray openings 522 at the at least one spraying mouth 5221 of the nozzle body 521, and simultaneously cleaning the extending nozzle body 521;

[0206] (c) retracting the nozzle body 521 by the resilient force F2 when selectively deactivated to the standby condition; and

[0207] (d) activating the flushing operation when the buttocks-cleaning is completed.

[0208] Referring to FIG. 27, an alternative operation method of the built-in power-free bidet system of the toilet for cleaning buttocks while the user sitting thereon is illustrated, wherein the alternative operation method comprises steps of:

[0209] (a) activating the flushing operation after use;

[0210] (b) activating the nozzle body 521 to extend outward from the inner edge surface 302 of the bowl body 30 by the hydraulic force F1 when selectively activated to the operation condition when the flushing operation is completed;

[0211] (c) spraying water to clean the user's buttocks through the one or more spraying openings 522 at the at least one spraying mouth 5221 of the nozzle body 521, and simultaneously cleaning the extending nozzle body 521; and

[0212] (d) retracting the nozzle body 521 by the resilient force F2 when selectively deactivated to the standby condition.

[0213] Referring FIGS. 15 to 25B of the drawings, a power-free bidet toilet with built-in power-free bidet system according to another preferred embodiment of the present invention is illustrated, wherein an alternative mode of the water supply arrangement 40 and the spray assembly 50 of the power-free bidet toilet is disclosed according to the inventive concept of the present invention.

[0214] According to the another preferred embodiment, the power-free bidet toilet 1′ also comprises the toilet flushing arrangement 10′, the toilet seat device 2′, the toilet bowl 3′, and the built-in power-free bidet system 4′. The built-in power-free bidet system 4′ also comprises the water supply arrangement 40′ and the spray assembly 50′, as shown in FIG. 15.

[0215] The toilet bowl 3′ also comprises the bowl body 30′ connected to the waste outlet 3001′ and configured to receive and discharging the flushing water to the waste outlet 3001′. Referring to FIG. 22 and FIG. 25A, the toilet flushing arrangement 10 also comprises a reservoir tank 11′ for storing a predetermined amount of the flushing water supplied from the external water source. Alternatively, the toilet bowl 3′ and the reservoir tank 11′ are construction integrally to form a one body configuration, and that the water supply arrangement 40′ is configured to be arranged in the receiving cavity 121′ of the container 12′ of the reservoir tank 11′ such that the spray assembly 50′ is arranged to extend from the bottom of the container 12′ to the inner edge surface 302′ of the bowl body 30′ of the toilet bowl 3′, as shown in FIGS. 23A-23C and FIGS. 25A-25B.

[0216] Referring to FIG. 15 and FIG. 23A, the water supply arrangement 40′ is arranged to supply water directly from the external water source to the receiving cavity 121′ of the container 12′ for flushing and cleaning. The water supply arrangement 40′, which is configured to be connected with the external water source via one or more inlet conduits for delivering water from the external water source, comprises a first hose 41′, a second hose 42′, a third hose 45′, an adapter unit 46′, and a water transfer connector 48′. The second hose 42′ is configured to directly receive the water from the external water source and deliver the water through the third hose 45′ to the spray assembly 50′ when the activation switch 14′ is selectively switched to activate the adapter unit 46′ to an open state. In the open state, the water directly flows from the external water source into one end of the adapter unit 46′, continues into one end of the water transfer connector 48′, and is then directed from another end of the water transfer connector 48′ to the spray assembly 50′.

[0217] According to the another preferred embodiment, the second hose 42′ is provided with a joint connector 47′ to penetrate a thickness T′ of a bottom wall of the container 12′. The joint connector 47′ has a through slot471′ shaped and sized to receive the second hose 42′ in a manner that allows the second hose 42′ to be fittingly and sealingly embedded therewithin.

[0218] The joint connector 47′ comprises two gasket rings, namely a lower gasket ring 451′ and an upper gasket ring 4511′, which are respectively arranged on a bottom surface and a top surface of the bottom wall of the container 12′. The lower and upper gasket rings 451′, 4511 are leak-proof sealing elements, wherein each of the lower and upper gasket rings 451′, 4511 is shaped and sized to fittingly and sealingly accommodate the joint connector 47′ therein.

[0219] Referring to FIG. 15 to FIG. 18B, the spray assembly 50′ also comprises a nozzle housing 51′ and a nozzle device 52′, wherein the nozzle device 52′ comprises a nozzle body 521′. Like the above preferred embodiment, the spray assembly 50′ is configured to be built-in the toilet bowl 3′ and equipped with the activation switch 14′ to directly supply the water from the external water source by a hydraulic force to perform the buttocks-cleaning operation and the self-cleaning operation when the activation switch 14′ is activated to perform the buttocks-cleaning operation.

[0220] The nozzle housing 51′ comprises a hollow sleeve 510′, which is integrally formed to have a first sleeve 511′ having a first passage 5110′ and a second sleeve 512′ and a second passage 5120′ coaxially aligned and communicated with the first passage 5110′ allowing the water to flow through the first and second passages 5110, 5120. The second passage 5120′ has a second diameter smaller than a first diameter of the first passage 5110′, such that a circular shoulder is defined at the junction position between the first sleeve 511′ and the second sleeve 512′ to form a housing stopper 513′.

[0221] According to the another preferred embodiment, the nozzle housing 51′ further comprises an inlet plug 513′ to be connected to the another end of the water transfer connector 48′ at one end thereof and connected to the nozzle device 52′ at the other end thereof. The inlet plug 513′ comprises a base 5131′ and an inlet mouth 5130′ extending from the base 5131′ for connecting to the water transfer connector 48′, as shown in FIG. 15 and FIG. 16, wherein the base 5131′ is integrally configured to have a through passage communicating with a water channel 5132′ of the inlet mouth 5130′ for delivering the water from the external water source.

[0222] Referring to FIG. 18A to FIG. 21, the nozzle device 52′ also comprises the nozzle body 521′ which is a tubular body having a nozzle passage 5210′ coaxially extended therethrough and an outer diameter equal to or slightly smaller than the second diameter of the second passage 5120′ of the second sleeve 512′. The nozzle body 521′ has an enlarged outlet end 5211′ and an inlet end 5212′ and is configured to fittingly insert through the second sleeve 5120′ until the inlet end 5212′ thereof is positioned in the first passage 5110′, such that the nozzle body 521′ is capable coaxially sliding in the second passage 5120′ while the nozzle stopper 523′ is coaxially sliding in the first passage 5110′.

[0223] The nozzle body 521′ further comprises an enlarged nozzle cap 524′ connected to the outlet end 5211 thereof and a ring-shape nozzle stopper 523′. As shown in FIG. 19A, the nozzle body 521′ has one or more spray openings 522′ radially formed at a position adjacent to the outlet end 5211′ of the nozzle body 521′ to communicate the nozzle passage 5210 with outside. To enhance the spraying nozzle effect, at least one spraying mouth 5221′ is indented in an upper side of the nozzle body 521′ and adjacent to the outlet end 5211′ of the nozzle body 521 and the one or more spray openings 522 is formed at the at least one spraying mouth 5221 for cleaning purposes.

[0224] According to the another preferred embodiment, the ring-shape nozzle stopper 523′ of the nozzle body 521′, which has a diameter smaller than the first passage 5110′ and larger than the second passage 5210′, is secured to the inlet end 5212′ of the nozzle body 521′. The nozzle cap 524′ have a diameter larger than a second sleeve 512′, mounted to the outlet end 5211′ of the nozzle body 521′, such that the water flowing through the first, second and nozzle passages 5110′, 5120′, 5210′ is guided to spray out through the one or more spray openings 522′ and the slidable movement of nozzle body 521′ in the second passage 5120′ is limited to an extending state when the nozzle body 521′ is extended out of the second sleeve 512′ until the nozzle stopper 523′ is stopped by the housing stopper 513′ of the hollow sleeve 510′, as shown in FIG. 18B, and a retracting state when the nozzle body 521′ is in a standby condition that the nozzle body 521′ is retracted in the second sleeve 512′ until the nozzle cap 524′ is stopped by the front end of the nozzle housing 511′, as shown in FIG. 18A.

[0225] Similar to the above preferred embodiment, referring to FIG. 18B and FIG. 24B, the predetermined length L2 of the nozzle body 521′ is longer than a predetermined length L1′ of the second sleeve 512′, such that at least a portion of the nozzle body 521′ near the outlet end 5211′ and where the one or more spray openings 522′ located can be extended out of the second sleeve 512′ until the nozzle stopper 523′ secured at the inlet end 5212′ of the nozzle body 521′ is stopped by an end stopper wall of the second sleeve 512 (i.e. the housing stopper 513′).

[0226] Referring to FIG. 22 to FIG. 23C and FIG. 25A to FIG. 25B, the bowl body 30′ of the toilet bowl 3′ has a water collection chamber 32′ formed below the support base 33′ configured to be enclosed therewithin. According to the another preferred embodiment, the support base 33′ is integrally extended into the container 12′ at a bottom portion of the container 12′ to form a toilet base 34′ through a nozzle channel 341′, wherein the nozzle channel 341′ is defined as a communicating channel between the water collection chamber 32′ and the container 12′.

[0227] In order to securely and protectively build in the nozzle device 51′ in the toilet bowl 3′, a nozzle channel 341′ is formed in the toilet base 34′ extending from the bottom of the container 12′ of the reservoir tank 11′ to the rear side of the inner edge surface 302′ to accommodate the nozzle device 51′ of the nozzle assembly 50′ therein. In addition, as shown in FIG. 18A and FIG. 18B, the nozzle housing 511′ further comprises a first coupling member 525′ for securely connecting the base 5131′ of the inlet plug 513′ to a rear end of the nozzle channel 341′ and a second coupling member 526′ for securely connecting the outlet end 5211′ to a front end of the nozzle channel 341′, such that the nozzle housing 511′ is securely mount in the nozzle channel 341′ while the nozzle body 521′ is capable of sliding in the first and second passages 5110′, 5120′ so as to rigidly mount the nozzle device 51′ in the toilet base 34′ of the toilet bowl 30′, preventing any displacement between the inlet plug 511′, the nozzle body 521′ and the nozzle channel 341′ when the water is directly supplied from the external water source to the nozzle body 521′.

[0228] Referring to FIGS. 15, 18, 20 and 24, it is worth mentioning that the first passage 5110′, the second passage 5120′ and the nozzle passage 5210′ are aligned along a common coaxial axis and are in water communication with each other. Furthermore, the first passage 5110′ is in water communication with the nozzle passage 5210′ via an inlet opening 5230′ formed in the nozzle stopper 523′ along the common coaxial axis so that, in the operation condition as shown in FIG. 18B, the water entering the first passage 5110′ channel 5112′ of the inlet mouth 5110′ is guided to flow into the nozzle passage 5210′ via the inlet opening 523′ for spraying out through the one or more spray openings 522′, and that, in the standby condition as shown in FIG. 18A, the nozzle stopper 523′ is sealingly pressed against base 5131′ of the of the inlet plug 513′ along the common coaxial axis, the water supply to the nozzle passage 5210′ is further shut off by the inlet plug 513.

[0229] The water channel 5132′ of the inlet plug 513′ is configured for the water to directly supplied from the external water source to the nozzle body 521′, through which the water enters the first passage 5110′ and deliver to the inlet opening 5230′ of the nozzle body 5210′ for spraying and cleaning through a series of water passages due to the hydraulic force produced by the water pressure of the water supply, when the activation switch 14′ is selectively switched to activate the nozzle device 52′ of the nozzle assembly 50′ to the operation condition state.

[0230] Like the above preferred embodiment, referring to FIG. 18A and FIG. 18B, the nozzle device 52′ comprises the at least one resilient element 53′, embodied as a coil spring, received in the nozzle housing 511′ for generating the resilient force F2′. The resilient force F2′ generated by the at least one resilient element 53′ is arranged to be smaller than the hydraulic force F1′, such that when the activation switch 14′ is switched on, the hydraulic force F1′ is larger than the resilient force F2′ and drive the nozzle body 512′ to slidably move frontward to the operation condition, and that when the activation switch 14′ is switch off to stop the water supply from the external water source, the hydraulic force F1′ becomes zero and the at least one resilient element 53′ applies the resilient force F2′ to drive the nozzle body 512′ to slidably move backward to retract the nozzle body 512′ back to the standby condition.

[0231] According to the another preferred embodiment, the resilient element 53′ is configured to be sleeved on the nozzle body 321′ and disposed at least within the second passage 5120′, wherein the resilient element 53′ is extended along first and second passages 5110′, 5120′ during the standby condition as shown in FIG. 14A and is compressed by the nozzle stopper 523′ to be within the second passage 5120′ during the operation condition as shown in FIG. 24B. Therefore, when the activation switch 14′ is switched off to shut off the water supply, that releases the water pressure in the nozzle housing 511′ and thus the hydraulic force F1′ applied to the nozzle stopper 523′, the compressed resilient element 53′ produces the resilient force F2′ to push the nozzle stopper 523′ rearwards and drive the nozzle body 521′ back to its standby condition as shown in FIG. 24A.

[0232] It is appreciated that, according to the another preferred embodiment, as shown in FIG. 25A and FIG. 25B, both the nozzle channel 341′ and the nozzle device 52′ are inclinedly arranged in such a manner that the nozzle device 52′ is extended frontwards and downwards. It facilitates nozzle body 521′ to extend out downward to the operation condition since the gravity adding a downward force to the hydraulic force F1′ and compress the resilient element 53′ to reserve the resilient force F2′ to be used for retracting the nozzle body 521′ once the water supply is shut down by the activation switch 14′.

[0233] As shown in FIG. 24, the resilient force F2′ is slightly less than the hydraulic force F1′, such that, in the operation condition, the hydraulic force F1′ drives the nozzle stopper 523′ forward relative to the housing stopper 513′ to extend out the predetermined length of the front portion of the nozzle body 521′ when the water is supplied directly from the external water source.

[0234] Referring to FIG. 16, FIG. 18B, FIG. 24A, and FIG. 24B, corresponding to the nozzle cap 524′ of the nozzle body 521′, according to the another preferred embodiment, positioned at the outlet end 5211′ thereof, the nozzle housing 511′ comprises a cap station 5241′, opposing to the nozzle cap 524′, provided at the front end of the second sleeve 512′ in such a manner that, in the standby condition, the nozzle cap 524′ rests against the cap station 5241′ as shown in FIG. 24A.

[0235] Preferably, a cross-sectional profile of the nozzle cap 524′ is matching with a cross-sectional profile of the cap station 5241′, and a cross-sectional dimension of the nozzle cap 524′ is slightly smaller than a cross-sectional dimension of the cap station 5241′, such that the cap station 5241′ is adapted to receive the nozzle cap 524′ in the standby condition.

[0236] Referring to FIG. 24A and FIG. 24B, it is worth mentioning that a length L4 between the nozzle cap 524′ and the cap station 5241′ can be slightly smaller than a distance L3 between the nozzle stopper 523′ and the housing stopper 513′, such that a sliding distance between the housing stopper 513′ and the nozzle stopper 523′ exceeds a moving distance required for the nozzle cap 524′ to reach the cap station 5241′, which can prevent the nozzle cap 524′ from stopping before contacting the cap station 5241′.

[0237] Referring to FIG. 19A, to enhance the spraying nozzle effect, according to the another preferred embodiment, the one or more spray openings 522′ are also formed at the at least one spraying mouth 5221′ indented in an upper side of the nozzle body 521′ and adjacent to the outlet end 5211′ of the nozzle body 521′ for cleaning purposes. Similarly, the at least one spraying mouth 5221 is embodied to have V shape that forms the forward slant spray surface 52211′ inclined upwardly and rearwardly and a backward slant spray surface 52212′ inclined upwardly and frontwardly, wherein the one or more spray openings are spraying nozzle holes spacedly formed in either or both the forward slant spray surface 52211′ and the backward slant spray surface 52212′.

[0238] Referring to FIG. 16 and FIG. 19B, the nozzle body 521′ further has at least one self-cleaning channel 5222′ adapted to clean the nozzle body 521′ while spraying out the water to clean the buttocks of the user. The nozzle passage 5210′ is integrally formed to communicate with the at least one spraying mouth 5221′ located on the top surface of the nozzle body 521′ near the nozzle cap 524′.

[0239] It is worth mentioning that the water can be sprayed with a moderate and comfortable force generated by the general water pressure 40 psi to 60 psi of the external water source. By configuring the shape and size of each of the one or more spray openings 522′, the spraying pressure of the spraying water can be adjusted according to the manufacture specification.

[0240] In particular, as shown in FIG. 19B and FIG. 21, the self-cleaning channel 5222′ includes a left groove 5222A integrally formed on one side of the nozzle body 521′, a right groove 5222B integrally formed on the opposite side, and a bottom grove 5222C integrally formed on a bottom side of the nozzle body 521′. The left groove 5222A and the right groove 5222B are respectively located at two sides of the at least one spraying mouth 5221′, and the bottom groove 5222C is located at an opposite side of the at least one spraying mouth 5221′.

[0241] The left groove 5222A, the right groove 5222B and the bottom groove 5222C are at least one recess-shaped channel formed along a cross-sectional profile of the nozzle body 521′, wherein the at least one recess-shaped channel are configured to directly accommodate water flowing therealong to clean the nozzle body 521′. The bottom groove 5222C is formed at a position below a mounting station 5243′ for mounting the nozzle cap 524′ through a mounting slot 5242′, as shown in FIG. 19B.

[0242] Referring to FIG. 20 and FIG. 21, furthermore, at least one inner spray mouth 5223′ is with one or more rinsing openings 52231′ formed thereat is provided at a rear end of the second conduit element 513′ of the nozzle body 521′, which is integrally formed and configured to be in water communication with the second passage 5131. Further, the one or more rinsing openings 52231′ at the at least one inner spray mouth 5223′ are formed to communicate with the left groove 5222A, the right groove 5222B and the bottom groove 5222C, allowing water from the external water source to directly flow into the left groove 5222A, the right groove 5222B and the bottom groove 5222C therethrough.

[0243] In the operation condition, the nozzle passage 5210′ supplies water from the external water source to the at least one spray mouth 5221′. Simultaneously, the water is also directed from the second passage 5131 through the one or more rinsing openings 52231′ at the at least one inner spray mouth 5223′ into the left groove 5222A, the right groove 5222B and the bottom groove 5222C. In such manner, in the operation condition, the nozzle body 521′ is rinsed by the water supplied from the left groove 5222A, the right groove 5222B and the bottom groove 5222C when the water is being sprayed toward the buttocks.

[0244] As shown in FIG. 23B, FIG. 23C and FIG. 25A, according to the another preferred embodiment, the inner edge surface 302′ of the bowl body 30′ is embodied as a concave edge surface of a circular surrounding wall curvedly extending from a bottom wall of a support base 33′, wherein a first portion of the inner edge surface 302′ is positioned below the support base 33′ of the bowl body 30′ and a second portion of the inner edge surface 302′ extends into a bottom portion of the reservoir tank 11′.

[0245] Referring to FIG. 23B, furthermore, the support base 33′ comprises a holding element 3321′ formed to conceal a space between the container 12′ and the support base 33′ at one end of the nozzle channel 341′ within the container 12′. The holding element 3321′ is shaped and sized to fittingly and sealingly hide the space between the container 12′ and the support base 33′ for preventing water contained in the container 12′ from flowing to the nozzle channel 341′.

[0246] The holding element 3321′ can be configured with a central through-channel 33211′ shaped and sized to fittingly and sealingly accommodate the nozzle device 52′ embedded within the central through-channel 33211′.

[0247] Referring to FIG. 20, FIG. 23B and FIG. 23C, the nozzle device 52′ is provided with the inlet plug 511′ disposed on an outer surface of the holding element 3321′ within the container 12′, and the nozzle device 52′ is accommodated in the holding element 3321′, wherein the inlet plug 511′ is connected to the water transfer connector 48′. In other words, the entire nozzle body 521′ is received within the nozzle channel 341′ through the holding element 3321′ in the standby condition.

[0248] It is worth mentioning that the nozzle channel 341′ has a channel cavity 3411′ at the other end thereof, wherein the channel cavity 3411′ is defined between the inner edge surface 302′ and the support rim 331′, wherein the nozzle body 521′ is configured to be received within the channel cavity 3411′. The nozzle channel 341′ extends from the container 12′ to the channel cavity 3411′ positioned on the support rim 331′ below the inner edge surface 302′.

[0249] In the operation condition, the front portion of the nozzle body 521′ extends outwardly from the channel cavity 3411′ by the hydraulic force F1′ when the activation switch 14′ is selectively switched to activate.

[0250] It is appreciated that the nozzle cap 524′ is shaped and sized to conceal the nozzle body 521′ within the channel cavity 3411′ when the nozzle body 521′ is selectively pulled back to the standby condition. In this standby condition, a cross-sectional profile of an outer surface of the nozzle cap 524′ is flushed with a profile surface of the inner edge surface 302′ of the bowl body 30′, such that a smooth and uniform surface is maintained with the inner edge surface 302′.

[0251] Also, a cross-sectional dimension of the nozzle cap 524′ may be slightly smaller than a cross-sectional dimension of the channel cavity 3411′, such that the nozzle cap 524′ can be inserted into the channel cavity 3411′ and positioned flush with the profile surface of the support rim 331′ when in the standby condition.

[0252] Referring to FIG. 23A to FIG. 24B, in the operation condition, the nozzle body 521′ extends outwardly from the channel cavity 3411′ by the hydraulic force F1′, which is directly produced by the external water source and delivered sequentially through the second hose 42′, the third hose 45′, the water transfer connector 48′, the inlet plug 511′, and subsequently through the nozzle device 52′ when the activation switch 14′ is selectively switched to activate the nozzle device 52′ to the operation condition.

[0253] In the standby condition, the nozzle body 521′ is driven to move rearward by the resilient force F2′, which drives the nozzle cap 524′ to align flushing with the surface of the inner edge surface 302′ when the activation switch 14′ is selectively switched to deactivate the nozzle device 52′ to the standby condition.

[0254] One skilled in the art will understand that the embodiment of the present invention as shown in the drawings and described above is exemplary only and not intended to be limiting.

[0255] It will thus be seen that the objects of the present invention have been fully and effectively accomplished. The embodiments have been shown and described for the purposes of illustrating the functional and structural principles of the present invention and is subject to change without departure from such principles. Therefore, this invention includes all modifications encompassed within the spirit and scope of the following claims.

Claims

1. A power-free bidet toilet, comprising:a toilet bowl comprising a bowl body having a top rim surface and inner edge surface;a toilet flushing arrangement configured for flushing a water from an external water source in the bowl body of the toilet bowl;a flushing switch located at a hand reachable position for the user and configured to activate the toilet flushing arrangement to discharge the water for flushing; anda built-in power-free bidet system, comprising:an activation switch located at a hand reachable position for the user sitting on the toilet bowl and configured to control a supply of the water from the external water source for a buttocks-cleaning operation and a self-cleaning operation;a water supply arrangement arranged between the toilet bowl and the external water source and configured to be controlled by the activation switch to selectively supply the water directly from the external water source for the buttocks-cleaning operation and the self-cleaning operation when the activation switch is switched on and to stop the supply of the water from the external water source when the activation switch is switched off; anda spray assembly configured to be built in the toilet bowl and equipped with the activation switch to selectively be activated to an operation condition and spray out the water supplied from the external water source by a hydraulic force produced by the water supplied to the spray assembly to perform the buttocks-cleaning operation and the self-cleaning operation when the activation switch is switched on, and be deactivated to a standby condition to stop spraying out the water when the activation switch is switched off.

2. The power-free bidet toilet, as recited in claim 1, wherein the spray assembly comprises a nozzle body being built in the toilet bowl and configured to be automatically extended out from the inner edge surface of the bowl body to an operation condition and to spray the water for cleaning the buttocks of the user by the hydraulic force when the water supply is switched on with the activation switch, and to stop spraying the water and automatically retracted back to the inner edge surface of the toilet bowl to a standby condition by a resilient force when the water supply is switched off with the activation switch.

3. The power-free bidet toilet, as recited in claim 2, wherein the spray assembly further comprises a nozzle housing configured to be mounted in a predetermined position of the inner edge surface of the bowl body and slidably receive the novel body therein, wherein an inlet end of the nozzle housing is configured to connect with the water supply arrangement and an outlet end of the nozzle housing is configured to allow at least a front portion of the nozzle body, where one or more spray openings formed, to extend out of the nozzle housing in the operation condition, wherein the activation switch is switched on, the hydraulic force is produced by the water flowing into the nozzle housing from the external water source to drive the nozzle body to move to the operation condition that at least the front portion of the nozzle body is extended out of the nozzle housing and the inner edge surface of the bowl body.

4. The power-free bidet toilet, as recited in claim 3, wherein the spray assembly further comprises at least one resilient element received in the nozzle housing, wherein the resilient force is generated by the at least one resilient element and arranged to be smaller than the hydraulic force, such that when the activation switch is switched on, the hydraulic force is larger than the resilient force and drive the nozzle body to slidably move frontward to the operation condition, and that when the activation switch is switch off to stop the water supply from the external water source, the hydraulic force becomes zero and the at least one resilient element applies the resilient force to drive the nozzle body to slidably move backward to retract the nozzle body back to the standby condition.

5. The power-free bidet toilet, as recited in claim 4, wherein the nozzle housing comprises a first sleeve having a first passage connecting with the water supply arrangement and a second sleeve having a second sleeve communicating with the first passage coaxially and a diameter smaller than that of the first passage, wherein the nozzle body is slidably disposed in the second sleeve, wherein the spray assembly further comprises a nozzle stopper mounted on the nozzle body and the at least one resilient element is arranged to produce the resilient force against the nozzle stopper to push the nozzle stopper rearward for retracting the nozzle body to the standby condition.

6. The power-free bidet toilet, as recited in claim 5, wherein the nozzle body is configured to have a nozzle passage coaxially connected to the second passage, wherein the water is allowed to flow from the first passage through the second passage to the nozzle passage, wherein the front portion of the nozzle body has one or more spray openings for the water in the nozzle body to spray out.

7. The power-free bidet toilet, as recited in claim 6, wherein the nozzle body has at least one spraying mouth formed at an upper side of the front portion thereof, wherein the one or more spray openings are formed at a slant surface of the at least one spraying mouth for spraying the water from the nozzle passage upwardly and inclinedly toward a target area of the buttocks of the user sitting on the bowl body.

8. The power-free bidet toilet, as recited in claim 1, further comprising a toilet seat device, which comprises a bidet seat, a seat cover and a link assembly, wherein the bidet seat is hingedly arranged on the top rim surface of the toilet bowl and configured to be movable between a raised position and a lowered position relative to the top rim surface of the toilet bowl, and the link assembly is configured to hingedly connect the bidet seat to the seat cover and to mount on the top rim surface of the bowl body, such that the bidet seat is detachable from the top rim surface by an upward force without using any tool.

9. The power-free bidet toilet, as recited in claim 8, wherein the link assembly comprises a quick-release attachment mechanism which comprises a pair of mounting members, each having a contact member located on one end of the seat cover hinged to the bidet seat, and a corresponding pair of contact pads disposed on the top rim surface of the bowl body, wherein the contact pads are configured to detachably engage with the corresponding contact elements, enabling the seat cover and the bidet seat to be detached from the bowl body merely by applying the upward force.

10. The power-free bidet toilet, as recited in claim 8, wherein the link assembly comprises a frame positioned at a hinge connection between the seat cover and the bidet seat on the top rim surface, wherein the bidet seat comprises two seat holes at one end thereof and the seat cover comprises two cover holes at one end thereof and the frame is configured with an outer pivot hole and an inner pivot hole on each side thereof, wherein the bidet seat is hingedly connected to the seat cover about the pivot axis by a single shaft extending from one end of the frame to the other end of the frame passing through the two cover holes, two seat holes, two outer pivot holes and two inner pivot holes.

11. The power-free bidet toilet, as recited in claim 10, wherein the link assembly further comprises a quick-release clamping mechanism, which comprises a pair of protruding couplers configured to be mounted on the top rim surface of the bowl body, and a pair of locking brackets each having a bracket hole, wherein the pair of locking brackets are positioned within the frame and the pair of protruding couplers are each further configured to detachably extend into a corresponding bracket hole when the frame is mounted on the top rim surface, enabling the seat cover and the bidet seat to be securely attached to the bowl body and the seat cover and the bidet seat to be detached from the bowl body by applying an upward force without the need for any tool.

12. The power-free bidet toilet, as recited in claim 2, further comprising a toilet seat device, which comprises a bidet seat, a seat cover and a link assembly, wherein the bidet seat is hingedly arranged on the top rim surface of the toilet bowl and configured to be movable between a raised position and a lowered position relative to the top rim surface of the toilet bowl, and the link assembly is configured to hingedly connect the bidet seat to the seat cover and to mount on the top rim surface of the bowl body, such that the bidet seat is detachable from the top rim surface by an upward force without using any tool.

13. The power-free bidet toilet, as recited in claim 12, wherein the link assembly comprises a quick-release attachment mechanism which comprises a pair of mounting members, each having a contact member located on one end of the seat cover hinged to the bidet seat, and a corresponding pair of contact pads disposed on the top rim surface of the bowl body, wherein the contact pads are configured to detachably engage with the corresponding contact elements, enabling the seat cover and the bidet seat to be detached from the bowl body merely by applying the upward force.

14. The power-free bidet toilet, as recited in claim 12, wherein the link assembly comprises a frame positioned at a hinge connection between the seat cover and the bidet seat on the top rim surface, wherein the bidet seat comprises two seat holes at one end thereof and the seat cover comprises two cover holes at one end thereof and the frame is configured with an outer pivot hole and an inner pivot hole on each side thereof, wherein the bidet seat is hingedly connected to the seat cover about the pivot axis by a single shaft extending from one end of the frame to the other end of the frame passing through the two cover holes, two seat holes, two outer pivot holes and two inner pivot holes.

15. The power-free bidet toilet, as recited in claim 14, wherein the link assembly further comprises a quick-release clamping mechanism, which comprises a pair of protruding couplers configured to be mounted on the top rim surface of the bowl body, and a pair of locking brackets each having a bracket hole, wherein the pair of locking brackets are positioned within the frame and the pair of protruding couplers are each further configured to detachably extend into a corresponding bracket hole when the frame is mounted on the top rim surface, enabling the seat cover and the bidet seat to be securely attached to the bowl body and the seat cover and the bidet seat to be detached from the bowl body by applying an upward force without the need for any tool.

16. The power-free bidet toilet, as recited in claim 7, further comprising a toilet seat device, which comprises a bidet seat, a seat cover and a link assembly, wherein the bidet seat is hingedly arranged on the top rim surface of the toilet bowl and configured to be movable between a raised position and a lowered position relative to the top rim surface of the toilet bowl, and the link assembly is configured to hingedly connect the bidet seat to the seat cover and to mount on the top rim surface of the bowl body, such that the bidet seat is detachable from the top rim surface by an upward force without using any tool.

17. The power-free bidet toilet, as recited in claim 16, wherein the link assembly comprises a quick-release attachment mechanism which comprises a pair of mounting members, each having a contact member located on one end of the seat cover hinged to the bidet seat, and a corresponding pair of contact pads disposed on the top rim surface of the bowl body, wherein the contact pads are configured to detachably engage with the corresponding contact elements, enabling the seat cover and the bidet seat to be detached from the bowl body merely by applying the upward force.

18. The power-free bidet toilet, as recited in claim 16, wherein the link assembly comprises a frame positioned at a hinge connection between the seat cover and the bidet seat on the top rim surface, wherein the bidet seat comprises two seat holes at one end thereof and the seat cover comprises two cover holes at one end thereof and the frame is configured with an outer pivot hole and an inner pivot hole on each side thereof, wherein the bidet seat is hingedly connected to the seat cover about the pivot axis by a single shaft extending from one end of the frame to the other end of the frame passing through the two cover holes, two seat holes, two outer pivot holes and two inner pivot holes.

19. The power-free bidet toilet, as recited in claim 18, wherein the link assembly further comprises a quick-release clamping mechanism, which comprises a pair of protruding couplers configured to be mounted on the top rim surface of the bowl body, and a pair of locking brackets each having a bracket hole, wherein the pair of locking brackets are positioned within the frame and the pair of protruding couplers are each further configured to detachably extend into a corresponding bracket hole when the frame is mounted on the top rim surface, enabling the seat cover and the bidet seat to be securely attached to the bowl body and the seat cover and the bidet seat to be detached from the bowl body by applying an upward force without the need for any tool.

20. An operation method of a built-in power-free bidet system for a power-free bidet toilet for cleaning buttocks of a user sitting on a toilet bowl of the power-free bidet toilet, comprising steps of:(a) activating a nozzle body to extend outward from an inner edge surface of a bowl body of the toilet bowl by a hydraulic force when selectively activated to an operation condition after use;(b) spraying water to clean the buttocks of the user through one or more spray openings at least one spraying mouth of the nozzle body, and simultaneously cleaning the nozzle body; and(c) retracting the nozzle body by a resilient force when selectively deactivated to a standby condition.

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