Roof extension room for a motor home
By designing a single movable roof panel and foldable side wall panels on the RV roof, combined with a hydraulic cylinder control and locking mechanism, the problems of insufficient usable area and poor sealing of the RV roof extension room are solved, realizing a highly comfortable and multifunctional extension room that meets the needs of upright walking.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- LUOYANG ZONGCHUANG MASCH TECH DEV CO LTD
- Filing Date
- 2025-06-24
- Publication Date
- 2026-05-29
Smart Images

Figure CN224297058U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of RV technology and relates to an extended room on the roof of an RV. Background Technology
[0002] RVs combine the functions of both houses and vehicles. When in motion, RVs should be folded up as much as possible to ensure safety. When parked, RVs should be extended as much as possible to meet living needs. Existing roof-mounted rooms, such as the patent with announcement number CN118478768A, "An Expandable RV Cabin Top Structure," simply raise the roof to increase the interior height, but the overall usable area of the vehicle does not increase, making it impractical. Another example is the patent with announcement number CN107021000B, "A Folding RV Roof Extension Device," which has the following drawbacks: First, the roof panel is divided into two parts, resulting in poor sealing when unfolded or folded, making it prone to leaks during rain. Second, the bottom frame easily traps water or dirt and is difficult to clean. Third, when the roof panel is divided into two parts and folded, the right roof panel and right wall panel cover the top layer. The length of the right roof panel plus the right wall panel is approximately equal to the width of the bottom frame, which limits the length of the right roof panel and right wall panel, resulting in insufficient room height when unfolded. More specifically, according to current regulations, the width of a passenger vehicle is limited to 2.55 meters. Based on the instruction manual's description of "in the front-to-back and left-to-right directions of the RV," the positions of its left and right wall panels are consistent with the left-to-right direction of the RV. Roughly estimating, the total length of the right roof panel plus the right wall panel after folding should not exceed 2.5 meters. However, the room height after unfolding is only about 1.5 meters. The room height is insufficient, requiring users to bend over and lower their heads, resulting in poor comfort. It is only suitable for use when resting in a lying position, thus limiting its applicability. Utility Model Content
[0003] The technical problem to be solved by this utility model is to overcome the existing defects and provide a roof-extended room for a motorhome. The purpose is that the roof of the motorhome has a relatively large area and a good view. A foldable and extendable room is set on the roof. The room has sufficient height to meet the user's needs for rest, entertaining guests, sightseeing and other functions. At the same time, the roof panel of the room is a whole piece without division, which ensures stability and prevents rain leakage.
[0004] To achieve the above objectives, this utility model provides the following technical solution: a roof-extended room for a motorhome, comprising a movable roof panel covering the entire roof; a left upper side panel and a right upper side panel are hinged to the lower edges of the middle sides of the movable roof panel; the lower ends of the left upper side panel and the right upper side panel are hinged to the left lower side panel and the right lower side panel, respectively; the lower ends of the left lower side panel and the right lower side panel are both hinged to the left and right edges of the motorhome roof, for hinged between the roof and the movable roof panel; the two side wall panels, when closed, each occupy half the width of the roof; the lower ends of the front end panel and the rear end panel are both hinged to the upper end of the roof; the two end panels, after being flipped up, stand upright at the front and rear ends of the two unfolded side wall panels, for forming a closed room by the two side wall panels, the roof, the two front end panels, and the movable roof panel; at least one of the end panels is provided with a door.
[0005] As a further optimization, both the lower left and lower right side panels are hinged with hydraulic cylinders; the other end of the hydraulic cylinder is hinged to the roof, and is used to control the expansion or contraction of the two side panels by means of the extension and retraction of the hydraulic cylinder.
[0006] As a further optimization, a locking structure is also included; there are two locking structures, symmetrically distributed on the left and right, the locking structure on the right side includes a fixed page fixed to the end plate at one end and a movable page hinged to the fixed page; the other end of the movable page is provided with two plugs; the two plugs can be inserted into the preset sockets on the upper right side plate and the lower right side plate respectively; correspondingly, the locking structure is also provided at the joint of the upper left side plate and the lower left side plate.
[0007] As a further optimization, a handle is hinged to the active page.
[0008] As a further optimization, the active page is provided with a notch to accommodate the handle bar, which is used to store the handle bar when it is retracted.
[0009] As a further optimization, a side railing assembly is also included; the side railing assembly includes a front side railing and a rear side railing located at the front and rear ends of the room; there are two of each of the front and rear side railings, symmetrically distributed on the left and right sides of the roof; the lower ends of the front and rear side railings are hinged to the edge of the roof, and the upper ends are hinged to the movable roof panel, and they can be folded in the middle so that the front and rear side railings can be unfolded or closed along with the side wall panel.
[0010] As a further optimization, the lower vertical railings of the front and rear side railings are arranged in a dense pattern, while the upper vertical railings are sparse, in order to form an observation window in the upper part of the front and rear side railings.
[0011] As a further optimization, a front guardrail is also included; the top of the front guardrail is connected to the movable roof by a rope, and its body can be inserted into a pre-set guardrail slot on the roof, so that when the movable roof is raised, the front guardrail rises from the guardrail slot.
[0012] As a further optimization, a rear guardrail is also included; the lower end of the rear guardrail is hinged to the roof, and after it is flipped up, it stands upright at the rear end of the two side rear guardrails, so as to form a closed fence around the four sides by the two side rear guardrails, the rear guardrail and the rear end plate.
[0013] As a further optimization, at least one of the upper left and upper right side panels is provided with a window.
[0014] Compared with the prior art, the beneficial effects of this utility model are: the room height can reach 2.5 meters after the utility model is unfolded, which meets the needs of people to walk upright. It can be used for various purposes such as rest, meeting guests, dining, and sightseeing. It is comfortable and the movable ceiling is a whole piece, which avoids rain leakage and has good sealing performance. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the expanded room after it has been unfolded, according to an embodiment of the present invention.
[0016] Figure 2 for Figure 1 A magnified view of part A;
[0017] Figure 3 for Figure 1 A magnified view of section B;
[0018] Figure 4 This is a schematic diagram of the locking structure according to an embodiment of the present invention;
[0019] Figure 5 This is a structural schematic diagram illustrating the process of retracting the extended room according to an embodiment of the present invention.
[0020] Figure 6 for Figure 5 A schematic diagram of the cross-sectional structure;
[0021] Figure 7 This is a schematic diagram illustrating the working principle of the hydraulic cylinder in an embodiment of this utility model.
[0022] The correspondence between the technical features in the figure and the reference numerals is as follows: movable top plate 1; side wall plate 2; upper left side plate 21; upper right side plate 22; lower left side plate 23; lower right side plate 24; socket 25; window 26; rear end plate 3; door 31; hydraulic cylinder 4; fixed flap 5; movable flap 51; plug 52; handle bar 53; notch 54; front side railing 61; rear side railing 62; observation window 63; front guardrail 64; rope 65; rear guardrail 66; RV 7; guardrail groove 71; passageway 72. Detailed Implementation
[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0024] For examples, please refer to Figure 1-7 This utility model provides a technical solution: a roof-extended room for a motorhome, including a movable roof panel 1 covering the entire roof; a left upper side panel 21 and a right upper side panel 22 are respectively hinged to the lower edges of the middle two sides of the movable roof panel 1; the lower ends of the left upper side panel 21 and the right upper side panel 22 are respectively hinged to the left lower side panel 23 and the right lower side panel 24; the lower ends of the left lower side panel 23 and the right lower side panel 24 are both hinged to the left and right edges of the roof of the motorhome 7, for hinged between the roof and the movable roof panel 1; the two side wall panels 2, when closed, each occupy half the width of the roof; the lower ends of the front end panel and the rear end panel 3 are both hinged to the upper end of the roof; the two end panels, when flipped up, stand upright at the front and rear ends of the two unfolded side wall panels 2, for forming a closed room by the two side wall panels 2, the roof, the two front end panels and the movable roof panel 1; at least one of the end panels is provided with a door 31.
[0025] In use, at least manually, the two end panels are folded inwards and laid flat on the roof. The symmetrical pair of side wall panels 2 are also folded inwards and laid flat on the end panels. The movable top panel 1 covers the pair of side wall panels 2, so that the folded room is laid flat on the roof, minimizing the vehicle height and ensuring driving safety. After parking, the pair of folded side wall panels 2 are first extended to lift the movable top panel 1. Then, the two end panels are erected and joined with the two side wall panels 2 to form the room. A pin mechanism can be installed between the two end panels and the side wall panels 2 as needed to ensure a stable connection. This pin mechanism is existing technology. At this point, since the two side wall panels 2 occupy half the width of the roof when closed, each side wall panel 2, when unfolded, is greater than or equal to the width of the RV 7. According to current regulations, the width of a passenger vehicle is approximately 2.55 meters. Therefore, the height of the side wall panel 2 can reach 2.5 meters, and the room height can reach 2.5 meters, or at least 2 meters or more. The room is high enough to meet the needs of people walking upright. This room can meet various needs such as rest, meeting guests, dining, and sightseeing. In addition, since the movable roof panel 1 is a single piece, it avoids rain leakage and has good sealing performance. More preferably, the movable roof panel 1 has downward-bent folded edges around its perimeter, so that all folded parts below the movable roof panel 1 can be closed together to achieve a sealing effect and prevent rainwater from entering below the movable roof panel 1 when it rains. The roof has a passageway 72 for personnel to enter and exit, which facilitates personnel to enter the roof from inside the RV 7. They can also climb onto the roof via a ladder, which can be flexibly selected according to needs.
[0026] To save manpower and improve automation, both the lower left side panel 23 and the lower right side panel 24 are hinged with hydraulic cylinders 4; the other end of each hydraulic cylinder 4 is hinged to the roof, and is used to control the opening or closing of the two side panel panels 2 through the extension and retraction of the hydraulic cylinder 4. For example... Figure 7 As shown, when the side wall panel 2 is folded down, the hydraulic cylinder 4 extends; when the side wall panel 2 is unfolded and upright, the hydraulic cylinder 4 retracts. It can be seen that multiple hydraulic cylinders 4 are controlled by the control system of the RV 7 and extend and retract synchronously to ensure that a pair of side wall panels 2 unfold or fold synchronously, thereby improving the stability during unfolding or folding.
[0027] Although the side wall panel 2 can remain vertical under the control of the hydraulic cylinder 4, a locking structure is also included to ensure that the side wall panel 2 maintains its vertical posture more reliably. There are two locking structures, symmetrically distributed on the left and right sides. The locking structure on the right side includes a fixed flap 5 fixed to the end plate at one end and a movable flap 51 hinged to the fixed flap 5. The other end of the movable flap 51 has two plugs 52. The two plugs 52 can be inserted into the pre-set sockets 25 on the upper right side panel 22 and the lower right side panel 24, respectively. Correspondingly, the locking structure is also provided at the joint of the upper left side panel 21 and the lower left side panel 23. Therefore, when a pair of plugs 52 are inserted into the sockets 25 on the upper right side panel 22 and the lower right side panel 24, they will not bend, maintaining the vertical posture of the side wall panel 2 and making the room more stable.
[0028] To facilitate the rotation of the movable page 51, a handle 53 is hinged to the movable page 51.
[0029] In order to reduce the space occupied by the handle bar 53 when it is closed and make it flat, the movable page 51 is provided with a notch 54 to accommodate the handle bar 53, so that the handle bar 53 can be stored in the notch 54 when it is closed.
[0030] To improve the safety of the exterior of the room and prevent people from accidentally falling off the roof, a side guardrail assembly is also included. The side guardrail assembly includes a front side guardrail 61 and a rear side guardrail 62 located at the front and rear ends of the room. There are two of each of the front side guardrail 61 and rear side guardrail 62, which are symmetrically distributed on the left and right sides of the roof. The lower ends of the front side guardrail 61 and rear side guardrail 62 are hinged to the edge of the roof, and the upper ends are hinged to the movable roof panel 1. They can be folded in the middle so that the front side guardrail 61 and rear side guardrail 62 can be unfolded or closed along with the side wall panel 2.
[0031] To avoid obstructing the view and facilitate sightseeing, the lower vertical bars of the front side railing 61 and the rear side railing 62 are arranged in a dense pattern, while the upper vertical bars are sparse, forming observation windows 63 on the upper parts of the front side railing 61 and the rear side railing 62. There are at least two sparse vertical bars on the upper part of each side railing to ensure that it can be opened or closed with the side wall panel 2. Similarly, to improve the breadth of the view, at least one of the upper left side panel 21 and the upper right side panel 22 has a window 26.
[0032] To further enhance the safety of the front of the roof, a front guardrail 64 is also included. The top of the front guardrail 64 is connected to the movable roof via a rope 65, and its body can be inserted into a pre-set guardrail slot 71 on the roof. When the movable roof is raised, the front guardrail 64 rises from the guardrail slot 71. It can be seen that the top of the front guardrail 64 is suspended by the rope 65, while its lower end still has a portion inserted into the guardrail slot 71, thus providing protection.
[0033] To improve safety at the rear of the vehicle roof, a rear guardrail 66 is also included. The lower end of the rear guardrail 66 is hinged to the roof, and after being flipped up, it stands upright at the rear of the two side rear guardrails 62, forming a closed fence around the vehicle by the two side rear guardrails 62, the rear guardrail 66, and the rear panel 3. The connection between the rear guardrail 66 and the two side guardrails can be achieved using a pin mechanism or a binding method as described in the prior art, whichever is appropriate to the requirements.
[0034] The advantages of this embodiment are that the room height can reach 2.5 meters after unfolding, which meets the needs of people to walk upright. It can be used for various purposes such as rest, meeting guests, dining, and sightseeing, and is very comfortable. In addition, the movable roof panel 1 is a whole piece, which avoids rain leakage and has good sealing performance.
[0035] Parts not detailed in this embodiment are all prior art. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A rooftop extension room for a motorhome; characterized in that: Includes a movable roof panel (1) covering the entire roof of the vehicle; a left upper side panel (21) and a right upper side panel (22) are respectively hinged to the lower edges of the middle two sides of the movable roof panel (1); the lower ends of the left upper side panel (21) and the right upper side panel (22) are respectively hinged to the left lower side panel (23) and the right lower side panel (24); the lower ends of the left lower side panel (23) and the right lower side panel (24) are respectively hinged to the left and right edges of the roof of the RV (7), for hinged between the roof and the movable roof panel (1); the two side panel panels (2) occupy half the width of the roof when closed; The lower ends of the front end plate and the rear end plate (3) are both hinged to the upper end of the vehicle roof; the two end plates are flipped up and then erected at the front and rear ends of the two unfolded side wall plates (2) respectively, for forming a closed room by the two side wall plates (2), the vehicle roof, the two front end plates and the movable top plate (1); at least one of the end plates is provided with a door (31).
2. The rooftop extension room of a motorhome according to claim 1, characterized in that: Both the lower left side panel (23) and the lower right side panel (24) are hinged with hydraulic cylinders (4); the other end of the hydraulic cylinder (4) is hinged to the roof of the vehicle and is used to control the two side wall panels (2) to open or close by extending and retracting the hydraulic cylinder (4).
3. The rooftop extension room of a motorhome according to claim 1, characterized in that: It also includes a locking structure; there are two locking structures, symmetrically distributed on the left and right. The locking structure on the right side includes a fixed page (5) fixed at one end to the end plate and a movable page (51) hinged to the fixed page (5); the other end of the movable page (51) is provided with two plugs (52); the two plugs (52) can be inserted into the preset sockets (25) on the upper right side plate (22) and the lower right side plate (24) respectively; correspondingly, the locking structure is also provided at the joint of the upper left side plate (21) and the lower left side plate (23).
4. The rooftop extension room of a motorhome according to claim 3, characterized in that: A handle (53) is hinged to the active page (51).
5. The rooftop extension room of a motorhome according to claim 4, characterized in that: The active page (51) is provided with a notch (54) for accommodating the handle (53), which is used to store the handle (53) in the notch (54) when it is retracted.
6. The rooftop extension room of a motorhome according to claim 1, characterized in that: It also includes a side guardrail assembly; the side guardrail assembly includes a front side guardrail (61) and a rear side guardrail (62) located at the front and rear ends of the room; there are two of each of the front side guardrail (61) and the rear side guardrail (62), which are symmetrically distributed on the left and right sides of the roof; The lower ends of the front side guardrail (61) and the rear side guardrail (62) are hinged to the side edge of the roof, and the upper ends are hinged to the movable roof plate (1). They can be folded in the middle so that the front side guardrail (61) and the rear side guardrail (62) can be unfolded or closed along with the side wall plate (2).
7. The rooftop extension room of a motorhome according to claim 6, characterized in that: The lower vertical railings of the front side railing (61) and the rear side railing (62) are arranged in a dense pattern, while the upper vertical railings are sparse, in order to form an observation window (63) on the upper part of the front side railing (61) and the rear side railing (62).
8. The rooftop extension room of a motorhome according to claim 1, characterized in that: It also includes a front guardrail (64); the top of the front guardrail (64) is connected to the movable roof plate (1) by a rope (65), and its body can be inserted into the guardrail groove (71) preset on the roof, so that when the movable roof plate (1) is raised, the front guardrail (64) rises from the guardrail groove (71).
9. The rooftop extension room of a motorhome according to claim 7, characterized in that: It also includes a rear guardrail (66); the lower end of the rear guardrail (66) is hinged to the roof of the vehicle, and after it is flipped up, it stands upright at the rear end of the two side rear guardrails (62) to form a fence that is closed on all sides by the two side rear guardrails (62), the rear guardrail (66) and the rear plate (3).
10. The rooftop extension room of a motorhome according to claim 1, characterized in that: At least one of the upper left side panel (21) and the upper right side panel (22) has a window (26).