Multifunctional hard rear extension sunken type mobile camping vehicle kitchen and bathroom cabin

Abstract

The application discloses a multifunctional hard rear extension sunken type vehicle-mounted kitchen and bathroom cabin of a traveling camping vehicle, which comprises a camping vehicle body and a main kitchen and bathroom cabin, and a sunken kitchen and bathroom cabin is further arranged in the main kitchen and bathroom cabin; the main kitchen and bathroom cabin is movably arranged in the camping vehicle body and can be horizontally pulled out relative to the camping vehicle body, and the sunken kitchen and bathroom cabin is movably connected in the main kitchen and bathroom cabin and can be pulled out from the bottom of the main kitchen and bathroom cabin. The application realizes bidirectional space expansion of the vehicle-mounted kitchen and bathroom cabin in the horizontal direction and the vertical direction through horizontal backward expansion of the main kitchen and bathroom cabin relative to the camping vehicle body and vertical downward sinking expansion of the sunken kitchen and bathroom cabin relative to the main kitchen and bathroom cabin, the main kitchen and bathroom cabin and the sunken kitchen and bathroom cabin are connected in series to form continuous vertical using space, the problem of insufficient using space of kitchen and bathroom facilities in the limited space of the traveling camping vehicle is effectively solved, the comfort and convenience of kitchen and bathroom operation in the parking state are greatly improved, and meanwhile, the structure is compact and reliable in the storage state, and the vehicle driving performance is not affected.

Description

Technical Field

[0001] This invention relates to a vehicle-mounted kitchen and bathroom cabin, specifically a multi-functional rigid rear-extended sunken type vehicle-mounted kitchen and bathroom cabin for travel and camping, belonging to the technical field of vehicle-mounted equipment for travel and camping. Background Technology

[0002] In modern travel and camping life, on-board kitchen and bathroom facilities are core components to ensure the quality of outdoor life. The size, functionality, and ease of use of the kitchen and bathroom cabin directly affect the camper's living experience.

[0003] In existing technologies, there are designs for expandable structures for vehicle-mounted kitchen and bathroom facilities. For example, a camping RV disclosed in announcement number CN211918501U has a toilet area at the rear of the vehicle, a kitchen area near the toilet, a living area in the middle, and a bedroom area at the front, with a pull-out bed. This RV achieves a compact structure and complete functionality through the rational layout of its various parts, but its kitchen and toilet areas are fixed structures, and the usable space cannot be changed, providing no additional operating space when parked. Another example is a kitchen and bathroom assembly based on an RV disclosed in announcement number CN207747810U, which has a foldable toilet, a foldable stove, and a foldable washbasin on the rear wall of its shell, allowing the space of the kitchen and bathroom assembly to be retractable and expandable. This solution achieves flexible space utilization through the folding of internal functional components, but the size of the shell itself is limited. Kitchen and bathroom facilities still need to occupy the interior space of the vehicle when in use. Furthermore, the folding functional components are cumbersome to operate during unfolding and storage, and cannot fundamentally solve the problem of insufficient space for kitchen and bathroom facilities in vehicles.

[0004] However, existing technologies still have many shortcomings: First, most kitchen and bathroom facilities in existing recreational camping vehicles are fixedly installed inside the vehicle, and the usable space is completely limited by the fixed dimensions of the vehicle. Operators find it difficult to turn around and operate in the cramped kitchen and bathroom space, seriously affecting the comfort of outdoor living. Second, some kitchen and bathroom facilities with expansion functions can only expand in one direction, such as only horizontally pulling out or only vertically raising and lowering, with limited space expansion effect, unable to simultaneously meet the dual needs of horizontal operating space and vertical activity space. Third, existing pull-out kitchen modules mostly use manual pulling methods, and there is a lack of synchronous drive control between the slide rails, which easily leads to jamming and asynchrony during the pulling process, making operation laborious and unreliable. Therefore, there is an urgent need for a multi-functional recreational camping vehicle-mounted kitchen and bathroom cabin that can achieve synchronous expansion in both horizontal and vertical directions, is easy to operate, and is reliably sealed. Summary of the Invention

[0005] The purpose of this invention is to provide a multifunctional rigid rear-extended sunken caravan kitchen and bathroom cabin to solve at least one of the above-mentioned technical problems.

[0006] The present invention achieves the above objectives through the following technical solution: a multifunctional rigid rear-extended sunken kitchen and bathroom cabin for camping vehicles, including a camping vehicle body and a main kitchen and bathroom cabin, wherein a sunken kitchen and bathroom cabin is also provided in the main kitchen and bathroom cabin; The main kitchen and bathroom compartment is installed inside the campervan and can be pulled out horizontally relative to the campervan body. The sunken kitchen and bathroom compartment is connected to the main kitchen and bathroom compartment and can be pulled out from the bottom of the main kitchen and bathroom compartment.

[0007] As a further embodiment of the present invention: a rear compartment is provided at the rear of the camper vehicle body, and the main kitchen and bathroom compartment is located in the rear compartment. A telescopic slide rail is provided between the main kitchen and bathroom compartment and the camper vehicle body, and the main kitchen and bathroom compartment is slidably connected to the camper vehicle body through the telescopic slide rail.

[0008] As a further embodiment of the present invention: a sunken kitchen and bathroom compartment is provided between the sunken kitchen and bathroom compartment and the main kitchen and bathroom compartment, and the sunken kitchen and bathroom compartment is slidably connected to the main kitchen and bathroom compartment through the sunken kitchen and bathroom compartment.

[0009] As a further embodiment of the present invention: the main kitchen and bathroom compartment is connected to an upper kitchen and bathroom door, the sunken kitchen and bathroom compartment is connected to a lower kitchen and bathroom door, a door sliding rail is provided between the upper kitchen and bathroom door and the lower kitchen and bathroom door, and the upper kitchen and bathroom door is slidably connected to the lower kitchen and bathroom door through the door sliding rail.

[0010] As a further embodiment of the present invention: the inner sidewalls on both sides of the main kitchen and bathroom compartment are provided with slide rail mounting grooves, and the sliding ends of the two sets of sliding rails are fixedly connected to the outer sidewalls on both sides of the sunken kitchen and bathroom compartment.

[0011] As a further embodiment of the present invention: the telescopic slide rail of the silo body, the slide rail of the silo door, and the sinking and lifting slide rail all adopt a three-section telescopic slide rail structure, and multi-stage telescopic cylinders are installed in the tracks of the telescopic slide rail of the silo body, the slide rail of the silo door, and the sinking and lifting slide rail.

[0012] As a further aspect of the present invention: the multi-stage telescopic cylinder is a pneumatic multi-stage telescopic cylinder, the cylinder body of each multi-stage telescopic cylinder is fixed in the corresponding slide rail, its telescopic end is fixedly connected to the corresponding slide rail movable end, and each multi-stage telescopic cylinder is uniformly controlled by the same pneumatic control system to achieve synchronous telescopic extension and retraction of each slide rail.

[0013] As a further embodiment of the present invention: an upward-opening door is hinged to the top of the outer side of the trunk compartment. The length and height of the main kitchen and bathroom compartment are greater than the length and height of the sunken kitchen and bathroom compartment. The maximum vertical lifting stroke of the sunken kitchen and bathroom compartment is adapted to the ground clearance of the bottom of the trunk compartment. The upward-opening door forms a sunshade structure when it is open.

[0014] As a further embodiment of the present invention: the main kitchen and bathroom compartment has an upper compartment formed inside, and the sunken kitchen and bathroom compartment has a lower compartment formed inside, with the upper compartment and the lower compartment connected vertically.

[0015] As a further aspect of the present invention: when the upper compartment door of the kitchen and bathroom is closed, it precisely fits and seals with the port of the upper compartment; when the lower compartment door of the kitchen and bathroom is closed, it precisely fits and seals with the port of the lower compartment.

[0016] The beneficial effects of this invention are as follows: The main kitchen and bathroom compartment is movably installed within the campervan body and can be horizontally pulled out relative to the campervan body, achieving a horizontal rearward expansion of the main kitchen and bathroom compartment. Without changing the original dimensions of the campervan body, the kitchen and bathroom operating space is extended to the outside of the vehicle, effectively increasing the actual usable area of ​​the kitchen and bathroom compartment, providing ample space for cooking and washing while the vehicle is parked. The sunken kitchen and bathroom compartment is movably connected to the main kitchen and bathroom compartment and can be moved out from the bottom of the main kitchen and bathroom compartment, achieving a vertical downward lowering and unfolding of the sunken kitchen and bathroom compartment. This fully utilizes the previously unused vertical space at the bottom of the vehicle, further... The vertical space of the kitchen and bathroom compartment has been expanded. The independent expansion method of horizontal and downward pull-out allows the kitchen and bathroom compartment to maintain a compact volume when stored to meet the needs of vehicle driving, without increasing wind resistance and driving safety hazards. When parked, the simultaneous expansion in both horizontal and vertical directions provides ample three-dimensional kitchen and bathroom operation space. The main kitchen and bathroom compartment and the sunken kitchen and bathroom compartment are connected vertically to form a complete continuous space. The operator can stand and move freely in the continuous space, which completely changes the cramped user experience of the traditional vehicle-mounted kitchen and bathroom compartment and greatly improves the space utilization and user comfort in the limited space of the caravan. Attached Figure Description

[0017] Figure 1 This is an overall structural view of the present invention; Figure 2 This is a structural view of the main kitchen and bathroom compartment on the closed side of the present invention; Figure 3 This is a structural schematic diagram of the main kitchen and bathroom compartment opening side of the present invention; Figure 4 This is a schematic diagram of the internal structure of the main kitchen and bathroom compartment and the sunken kitchen and bathroom compartment of the present invention. Figure 5 This is a schematic diagram of the rear structure of the main kitchen and bathroom compartment and the sunken kitchen and bathroom compartment of the present invention; Figure 6 This is a schematic diagram of the connection structure between the multi-stage telescopic cylinder and the telescopic slide rail of the chamber body according to the present invention.

[0018] In the diagram: 1. Campervan body; 11. Rear cargo compartment; 12. Upward-opening cargo door; 2. Main kitchen and bathroom compartment; 21. Cargo compartment telescopic slide rail; 22. Slide rail mounting slot; 23. Upper compartment; 3. Upper kitchen and bathroom compartment door; 31. Lower kitchen and bathroom compartment door; 32. Door slide rail; 4. Lowered kitchen and bathroom compartment; 41. Lowered lifting slide rail; 42. Lower compartment; 5. Multi-stage telescopic cylinder. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Example 1: As Figures 1 to 6 As shown, a multi-functional rigid rear-extended sunken kitchen and bathroom cabin for a camping vehicle includes a camping vehicle body 1 and a main kitchen and bathroom cabin 2, and a sunken kitchen and bathroom cabin 4 is also provided in the main kitchen and bathroom cabin 2. The main kitchen and bathroom compartment 2 is movable and installed inside the camper vehicle body 1, and the main kitchen and bathroom compartment 2 can be pulled out horizontally relative to the camper vehicle body 1. The sunken kitchen and bathroom compartment 4 is movably connected inside the main kitchen and bathroom compartment 2, and the sunken kitchen and bathroom compartment 4 can be movably pulled out from the bottom of the main kitchen and bathroom compartment 2.

[0021] The main kitchen and bathroom compartment 2 is movable within the campervan body 1 and can be horizontally pulled out relative to the campervan body 1, realizing the horizontal rearward expansion of the main kitchen and bathroom compartment 2 and effectively increasing the usable area of ​​the kitchen and bathroom compartment; the sunken kitchen and bathroom compartment 4 is movably connected to the main kitchen and bathroom compartment 2 and can be moved out from the bottom of the main kitchen and bathroom compartment 2, realizing the vertical downward sinking and unfolding of the sunken kitchen and bathroom compartment 4, further expanding the vertical space; the dual-layer expansion method of horizontal and downward pulling allows the kitchen and bathroom compartment to maintain a compact volume in the storage state to adapt to the vehicle driving needs, and in the parked use state, ample kitchen and bathroom operation space is obtained through independent expansion in two directions, which greatly improves the space utilization and user comfort in the limited space of the campervan.

[0022] Furthermore, a rear compartment 11 is provided at the rear of the campervan body 1, and the main kitchen and bathroom compartment 2 is located in the rear compartment 11. A telescopic slide rail 21 is provided between the main kitchen and bathroom compartment 2 and the campervan body 1. The main kitchen and bathroom compartment 2 is slidably connected to the campervan body 1 through the telescopic slide rail 21. The rear compartment 11 at the rear of the campervan body 1 provides dedicated storage space for the main kitchen and bathroom compartment 2, so that the main kitchen and bathroom compartment 2 can be completely contained in the rear compartment 11 when retracted, maintaining a clean appearance when the vehicle is in motion. The telescopic slide rail 21 between the main kitchen and bathroom compartment 2 and the campervan body 1 provides precise guidance and stable support for the horizontal extension and retraction of the main kitchen and bathroom compartment 2, ensuring the smooth movement and accurate positioning of the main kitchen and bathroom compartment 2 during horizontal extension and retraction, and avoiding shaking and jamming during the extension and retraction process.

[0023] Furthermore, a sliding rail 41 is provided between the sunken kitchen and bathroom compartment 4 and the main kitchen and bathroom compartment 2. The sunken kitchen and bathroom compartment 4 is slidably connected to the main kitchen and bathroom compartment 2 through the sliding rail 41. The sliding rail 41 between the sunken kitchen and bathroom compartment 4 and the main kitchen and bathroom compartment 2 provides vertical guidance and reliable load-bearing support for the vertical sinking movement of the sunken kitchen and bathroom compartment 4, ensuring the vertical movement accuracy and attitude stability of the sunken kitchen and bathroom compartment 4 during the descent and unfolding and the rise and retraction process, preventing the sunken kitchen and bathroom compartment 4 from tilting or deviating during the lifting and lowering process, and ensuring smooth and reliable relative movement between the sunken kitchen and bathroom compartment 4 and the main kitchen and bathroom compartment 2.

[0024] Furthermore, the main kitchen and bathroom compartment 2 is connected to the upper kitchen and bathroom door 3, and the sunken kitchen and bathroom compartment 4 is connected to the lower kitchen and bathroom door 31. A door sliding rail 32 is provided between the upper kitchen and bathroom door 3 and the lower kitchen and bathroom door 31. The upper kitchen and bathroom door 3 is slidably connected to the lower kitchen and bathroom door 31 through the door sliding rail 32, realizing the relative sliding opening and closing between the upper kitchen and bathroom door 3 and the lower kitchen and bathroom door 31. This allows the two doors to slide downwards in an overlapping manner, avoiding the problem of traditional swing-out or lift-up doors occupying extra external space when opened. This is especially suitable for travel and camping scenarios with limited space.

[0025] Example 2: In addition to all the technical features included in Example 1, this example also includes: Both inner walls of the main kitchen and bathroom compartment 2 are provided with slide rail mounting grooves 22. Sinking and lifting slide rails 41 are embedded and fixed inside each slide rail mounting groove 22. The sliding ends of the two sets of sinking and lifting slide rails 41 are fixedly connected to the outer walls of both sides of the sunken kitchen and bathroom compartment 4. The slide rail mounting grooves 22 provide embedded installation space for the sinking and lifting slide rails 41, ensuring that the sinking and lifting slide rails 41 are embedded and fixed inside the slide rail mounting grooves 22 without protruding from the inner wall surface of the main kitchen and bathroom compartment 2. This ensures the flatness of the interior wall of the main kitchen and bathroom compartment 2 and prevents the sinking and lifting slide rails 41 from occupying internal space or interfering with the arrangement of other kitchen and bathroom functional components. The sliding ends of the two sets of sinking and lifting slide rails 41 are fixedly connected to the outer walls of both sides of the sunken kitchen and bathroom compartment 4, achieving symmetrical and synchronous support on both sides of the sunken kitchen and bathroom compartment 4, ensuring stable force distribution during the lifting and lowering process.

[0026] Furthermore, the telescopic slide rail 21, the door slide rail 32, and the lowering and lifting slide rail 41 all adopt a three-section telescopic slide rail structure. Multi-stage telescopic cylinders 5 are installed within the tracks of the telescopic slide rail 21, the door slide rail 32, and the lowering and lifting slide rail 41. The three-section slide rail structure has a compact length when fully retracted to adapt to the space constraints of the storage state, and provides a large telescopic stroke when fully extended to meet the expansion needs of each functional compartment. The multi-stage telescopic cylinders 5 installed within each slide rail serve as a unified power source for the telescopic movement of each slide rail, achieving synchronous drive of the telescopic movement of each slide rail. This avoids response delays and stroke deviations caused by independent drive from multiple power sources, effectively eliminating the risk of slide rail jamming and structural damage.

[0027] Furthermore, the multi-stage telescopic cylinder 5 is a pneumatic multi-stage telescopic cylinder. The cylinder body of each multi-stage telescopic cylinder 5 is fixed in the corresponding slide rail, and its telescopic end is fixedly connected to the corresponding slide rail movable end. Each multi-stage telescopic cylinder 5 is uniformly controlled by the same pneumatic control system to achieve synchronous telescopic movement of each slide rail. The telescopic movement of each slide rail is directly driven by the corresponding multi-stage telescopic cylinder 5. The uniform control by the same pneumatic control system to achieve synchronous telescopic movement of each slide rail eliminates the asynchronous phenomenon caused by air circuit differences or control signal delays, ensuring that the main kitchen and bathroom compartment 2, the upper kitchen and bathroom door 3, the lower kitchen and bathroom door 31, and the sunken kitchen and bathroom compartment 4 have stable postures and consistent movements during expansion and retraction.

[0028] Example 3: In addition to all the technical features included in Example 1, this example also includes: The top of the outer side of the trunk 11 is hinged with an upward-opening door 12. The length and height of the main kitchen and bathroom compartment 2 are greater than those of the sunken kitchen and bathroom compartment 4. The maximum vertical lifting stroke of the sunken kitchen and bathroom compartment 4 is adapted to the ground clearance of the bottom of the trunk 11. When open, the upward-opening door 12 forms a sunshade structure. When open, the upward-opening door 12 flips upward, without occupying extra space behind and to the side of the vehicle, thus avoiding interference with surrounding obstacles. The length and height of the main kitchen and bathroom compartment 2 are greater than those of the sunken kitchen and bathroom compartment 4, so that the sunken kitchen and bathroom compartment 4 can be completely accommodated at the bottom of the main kitchen and bathroom compartment 2 without interference when retracted, ensuring the compactness of the storage state. The maximum vertical lifting stroke of the sunken kitchen and bathroom compartment 4 is adapted to the ground clearance of the bottom of the trunk 11, ensuring that the sunken kitchen and bathroom compartment 4 can be completely lowered to the ground or close to the ground, realizing the convenience of personnel entry and exit and the use of kitchen and bathroom functional components.

[0029] Furthermore, the main kitchen and bathroom compartment 2 has an upper compartment 23 inside, and the sunken kitchen and bathroom compartment 4 has a lower compartment 42 inside. The upper compartment 23 and the lower compartment 42 are connected vertically, allowing people to move freely in the connected space and use the kitchen and bathroom functional components in the upper and lower compartments at the same time. This eliminates the limitation of the partition structure on space utilization, maximizing the utilization efficiency and providing the best user experience for the limited vehicle space.

[0030] When the upper kitchen and bathroom door 3 is closed, it precisely engages and seals with the port of the upper compartment 23. When the lower kitchen and bathroom door 31 is closed, it precisely engages and seals with the port of the lower compartment 42, ensuring the independent sealing of the two compartments when closed. This effectively prevents external rainwater, dust and insects from entering the compartments and protects the kitchen and bathroom functional components inside the compartments from external environmental corrosion.

[0031] Working principle: Using the campervan body 1 as the installation base, the main kitchen and bathroom compartment 2 is set inside the rear compartment 11 and is slidably connected to the campervan body 1 via the compartment telescopic slide rail 21. The sunken kitchen and bathroom compartment 4 is set at the bottom of the main kitchen and bathroom compartment 2 and is slidably connected to the main kitchen and bathroom compartment 2 via the sunken lifting slide rail 41. When parked, the operator activates the multi-stage telescopic cylinders 5 through the pneumatic control system. The multi-stage telescopic cylinders 5 set in the track of the compartment telescopic slide rail 21 drive the compartment telescopic slide rail 21 to extend, pushing the main kitchen and bathroom compartment 2 to slide backward relative to the campervan body 1 in a horizontal direction and pull it out, so that the main kitchen and bathroom compartment 2 extends horizontally backward from the rear compartment 11 to the outside of the vehicle, and the upper compartment 23 is then fully exposed and can be used by personnel. At the same time, the multi-stage telescopic cylinder 5 set in the track of the sinking and lifting slide rail 41 drives the sinking and lifting slide rail 41 to extend, pushing the sinking kitchen and bathroom compartment 4 to slide and sink downward relative to the main kitchen and bathroom compartment 2 in the vertical direction. The lower compartment 42 extends vertically downward from the bottom of the main kitchen and bathroom compartment 2 until it approaches or touches the ground. The upper compartment 23 and the lower compartment 42 are connected vertically to form a continuous vertical space. After the main kitchen and bathroom compartment 2 and the sunken kitchen and bathroom compartment 4 are expanded simultaneously, the upper kitchen and bathroom door 3 and the lower kitchen and bathroom door 31 are opened relative to each other by sliding the door rails 32, and the operators can enter the connected upper compartment 23 and lower compartment 42 to use the kitchen and bathroom functional components.

[0032] After use, the multi-stage telescopic cylinder 5 reverses its action to drive the telescopic slide rail 21 and the sinking lifting slide rail 41 to retract synchronously. The main kitchen and bathroom compartment 2 retracts horizontally into the rear compartment 11, and the sinking kitchen and bathroom compartment 4 rises vertically to return to the bottom of the main kitchen and bathroom compartment 2. The upper kitchen and bathroom door 3 and the lower kitchen and bathroom door 31 slide and close relative to each other. Each compartment door and the port of the corresponding compartment are precisely fitted and sealed. The entire kitchen and bathroom compartment is completely stored inside the campervan body 1, maintaining the compact appearance of the vehicle while it is in motion.

[0033] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0034] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A multifunctional rigid rear-extended sunken kitchen and bathroom compartment for a camping vehicle, comprising a camping vehicle body (1) and a main kitchen and bathroom compartment (2), characterized in that: The main kitchen and bathroom compartment (2) is also equipped with a sunken kitchen and bathroom compartment (4). The main kitchen and bathroom compartment (2) is movable inside the camper vehicle body (1), and the main kitchen and bathroom compartment (2) can be pulled out horizontally relative to the camper vehicle body (1). The sunken kitchen and bathroom compartment (4) is movably connected inside the main kitchen and bathroom compartment (2), and the sunken kitchen and bathroom compartment (4) can be movably pulled out from the bottom of the main kitchen and bathroom compartment (2).

2. The multifunctional rigid rear-extended sunken camping vehicle kitchen and bathroom cabin according to claim 1, characterized in that: The rear of the camper vehicle body (1) is provided with a trunk compartment (11), and the main kitchen and bathroom compartment (2) is located in the trunk compartment (11). A telescopic slide rail (21) is provided between the main kitchen and bathroom compartment (2) and the camper vehicle body (1). The main kitchen and bathroom compartment (2) is slidably connected to the camper vehicle body (1) through the telescopic slide rail (21).

3. The multifunctional rigid rear-extended sunken camping vehicle kitchen and bathroom cabin according to claim 2, characterized in that: A sinking lifting slide rail (41) is provided between the sunken kitchen and bathroom compartment (4) and the main kitchen and bathroom compartment (2), and the sunken kitchen and bathroom compartment (4) is slidably connected to the main kitchen and bathroom compartment (2) through the sinking lifting slide rail (41).

4. The multifunctional rigid rear-extended sunken camping vehicle kitchen and bathroom cabin according to claim 3, characterized in that: The main kitchen and bathroom compartment (2) is connected to the upper kitchen and bathroom compartment door (3), and the sunken kitchen and bathroom compartment (4) is connected to the lower kitchen and bathroom compartment door (31). A compartment door slide rail (32) is provided between the upper kitchen and bathroom compartment door (3) and the lower kitchen and bathroom compartment door (31). The upper kitchen and bathroom compartment door (3) is slidably connected to the lower kitchen and bathroom compartment door (31) through the compartment door slide rail (32).

5. The multifunctional rigid rear-extended sunken camping vehicle-mounted kitchen and bathroom cabin according to claim 4, characterized in that: The inner sidewalls of both sides of the main kitchen and bathroom compartment (2) are provided with slide rail mounting grooves (22), and the slide rail mounting grooves (22) are all fitted with and fixedly installed with sinking lifting slide rails (41). The sliding ends of the two sets of sinking lifting slide rails (41) are respectively fixedly connected to the outer sidewalls of both sides of the sinking kitchen and bathroom compartment (4).

6. The multifunctional rigid rear-extended sunken camping vehicle kitchen and bathroom cabin according to claim 4, characterized in that: The telescopic slide rail (21), the door slide rail (32), and the sinking and lifting slide rail (41) all adopt a three-section telescopic slide rail structure. The telescopic slide rail (21), the door slide rail (32), and the sinking and lifting slide rail (41) are all equipped with multi-stage telescopic cylinders (5).

7. The multifunctional rigid rear-extended sunken camping vehicle kitchen and bathroom cabin according to claim 6, characterized in that: The multi-stage telescopic cylinder (5) is a pneumatic multi-stage telescopic cylinder. The cylinder body of each multi-stage telescopic cylinder (5) is fixed in the corresponding slide rail, and its telescopic end is fixedly connected to the corresponding slide rail movable end. Each multi-stage telescopic cylinder (5) is uniformly controlled by the same pneumatic control system to realize the synchronous telescopic extension and retraction of each slide rail.

8. The multifunctional rigid rear-extended sunken camping vehicle kitchen and bathroom cabin according to claim 4, characterized in that: The top of the rear compartment (11) is hinged to an upward-opening door (12). The length and height of the main kitchen and bathroom compartment (2) are greater than the length and height of the sunken kitchen and bathroom compartment (4). The maximum vertical lifting stroke of the sunken kitchen and bathroom compartment (4) is adapted to the ground height of the bottom of the rear compartment (11). The upward-opening door (12) forms a sunshade structure when it is open.

9. The multifunctional rigid rear-extended sunken camping vehicle kitchen and bathroom cabin according to claim 4, characterized in that: The main kitchen and bathroom compartment (2) has an upper compartment (23) inside, and the sunken kitchen and bathroom compartment (4) has a lower compartment (42) inside. The upper compartment (23) and the lower compartment (42) are connected vertically.

10. The multifunctional rigid rear-extended sunken camping vehicle kitchen and bathroom cabin according to claim 9, characterized in that: When the upper kitchen and bathroom door (3) is closed, it is precisely fitted and sealed with the port of the upper compartment (23). When the lower kitchen and bathroom door (31) is closed, it is precisely fitted and sealed with the port of the lower compartment (42).

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