Sofa capable of cleaning bottom

Abstract

The utility model relates to the technical field of furniture sofas, in particular to a bottom cleaning sofa which is characterized by comprising a sofa body, a gap is formed between the bottom of the sofa body and the ground, the gap is provided with a first opening side and a second opening side which are oppositely arranged, and the bottom cleaning sofa further comprises an air blowing module, the dust blower is arranged at the bottom of the sofa body, is positioned on the first opening side and is used for blowing dust from the first opening side to the second opening side; the dust collection module is arranged at the bottom of the sofa body, located on the second opening side and used for adsorbing dust from the first opening side, and the problem that the bottom of the sofa is not easy to clean is solved.

Description

Technical Field

[0001] This utility model relates to the field of furniture and sofa technology, and in particular to a sofa with a bottom cleaning function. Background Technology

[0002] Sofas, as a common type of furniture, can enhance the experience and happiness of life. Currently, sofas come in various shapes and sizes, and with the development of technology, their functions are becoming increasingly diverse, meeting the actual needs of different users.

[0003] A typical sofa structure mainly includes a frame, backrest, seat cushion, and armrests. The backrest is installed at the back of the frame, while the armrests are located on the left and right sides of the frame. In addition, the seat cushion is located at the top of the frame. The combined effect of the seat cushion, backrest, and armrests provides comfortable support for the human body.

[0004] Current sofa structures still have many shortcomings. For example, in some low-profile or floor-standing sofas, the low base results in a small space underneath, making it difficult to clean. This causes dust to accumulate under the sofa, making it difficult for manual cleaning or robot vacuums to access, and creating blind spots that are hard to clean, thus making cleaning work difficult. Therefore, it is necessary to improve the existing technology.

[0005] The above information is provided as background information only to aid in understanding this disclosure and does not constitute an assertion or admission that any of the above content can be used as prior art relative to this disclosure. Utility Model Content

[0006] This invention provides a bottom-cleaning sofa to solve the problem of the difficulty in cleaning the bottom of sofas in the prior art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A bottom-cleaning sofa includes a sofa body with a gap between the bottom of the sofa body and the ground, the gap having a first opening side and a second opening side disposed opposite to each other, and further includes:

[0009] A blower module is disposed at the bottom of the sofa body and located on the first opening side, for blowing dust from the first opening side to the second opening side;

[0010] A dust-collecting module is provided at the bottom of the sofa body and located on the second opening side, for adsorbing dust from the first opening side.

[0011] Preferably, it also includes an air guide component, one side of which is disposed on the blowing module, and the other side of which is vertically and vertically disposed on the dust collection module;

[0012] The air guide assembly includes at least two states:

[0013] In the first state, the air guide assembly is inclined downward from the first opening side to the second opening side, thereby guiding the dust to the dust collection module;

[0014] In the second state, the air guide assembly is flattened and attached to the bottom of the sofa body to prevent dust from entering the sofa body.

[0015] Preferably, the air guide assembly includes:

[0016] The first guide wheel lifting module is mounted on the blower module;

[0017] The second guide wheel lifting module is mounted on the vacuuming module;

[0018] And the air guide layer, with the opposite sides connected to the first guide wheel lifting module and the second guide wheel lifting module respectively.

[0019] Preferably, in the first state, the tilt angle of the air guide assembly is between 10° and 30°.

[0020] Preferably, the blower module includes:

[0021] The first seat is fixedly installed at the bottom of the sofa body. The first seat has a first airflow channel and an air outlet communicating with the first airflow channel is opened on one side.

[0022] A first drive motor is disposed on the first base;

[0023] The first blade is connected to the output shaft of the first drive motor and located in the first guide channel. The first drive motor is used to drive the first blade to rotate so that the first blade generates airflow and blows it out through the air outlet.

[0024] Preferably, both the first base and the air outlet are elongated, with the first base extending from one end of the first opening to the other end, and the air outlet extending from one end of the first base to the other end.

[0025] Preferably, the vacuuming module includes:

[0026] The second seat is fixedly installed at the bottom of the sofa body. The second seat has a second airflow channel and an air intake that communicates with the second airflow channel is opened on one side.

[0027] A second drive motor is disposed on the second base body;

[0028] The second blade is connected to the output shaft of the second drive motor and is located within the second guide channel;

[0029] A dirt collection box is provided on the second base and communicates with the second flow channel. The second drive motor is used to drive the second blade to rotate so that the second blade generates airflow and sucks the dust into the dirt collection box.

[0030] Preferably, both the second seat and the air inlet are elongated, with the second seat extending from one end of the second opening to the other end, and the air inlet extending from one end of the second seat to the other end.

[0031] Preferably, the second base is provided with a pull-out groove, the dirt storage box slides into the pull-out groove, and the dirt storage box is detachably connected to the second base through the pull-out groove.

[0032] Preferably, the gap further includes a third opening side and a fourth opening side located between the first opening side and the second opening side, the third opening side and the fourth opening side being disposed opposite to each other, and a baffle strip being provided at the bottom of the sofa body, the baffle strip contacting the ground and used to cover the third opening side and the fourth opening side.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] The bottom cleaning sofa provided by this utility model uses a blower module to blow dust from the first opening side of the gap to the second opening side. At the same time, the suction module located on the second opening side can absorb the blown dust to clean the bottom of the sofa. In this process, there is no need to manually reach under the sofa to clean it. It can also clean small spaces, thus solving the problem of the bottom of the sofa being difficult to clean.

[0035] This invention has other features and advantages that will be apparent from or will be set forth in detail in the accompanying drawings and the following detailed description, which together serve to explain the particular principles of this invention. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a schematic diagram of the bottom cleaning sofa provided in an embodiment of the present invention;

[0038] Figure 2 This is a structural schematic diagram of the bottom cleaning sofa provided in another embodiment of the present utility model;

[0039] Figure 3 This is a structural schematic diagram of the bottom cleaning sofa provided in another embodiment of the present utility model;

[0040] Figure 4 This is a structural schematic diagram of the bottom cleaning sofa provided in another embodiment of the present utility model;

[0041] Figure 5 This is a schematic diagram of another embodiment of the bottom cleaning sofa provided in this utility model.

[0042] Figure label:

[0043] 1. Sofa body;

[0044] 2. Air blowing module; 21. First base; 211. Air outlet; 212. First airflow channel; 22. First drive motor; 23. First blade;

[0045] 3. Vacuuming module; 31. Second base; 311. Second airflow channel; 312. Air intake; 32. Second drive motor; 33. Second blades; 34. Dirt collection box;

[0046] 4. Air guide assembly; 41. First guide wheel lifting module; 42. Second guide wheel lifting module; 43. Air guide layer; 5. Baffle strip;

[0047] 1001, First opening side; 1002, Second opening side; 1003, Third opening side; 1004, Fourth opening side. Detailed Implementation

[0048] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0049] In the description of this utility model, it should be understood that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be a component that is centrally positioned therein. When a component is considered to be "set" on another component, it can be directly set on the other component or there may be a component that is centrally positioned therein.

[0050] Furthermore, terms such as "long," "short," "inner," and "outer" indicate orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings. They are used only for the convenience of describing this utility model and do not indicate or imply that the device or component referred to must have this specific orientation or operate in a specific orientational configuration. Therefore, they should not be construed as limitations of this utility model.

[0051] The following is in conjunction with the appendix Figures 1-5 The technical solution of this utility model will be further illustrated through specific implementation methods.

[0052] Please refer to Figures 1-3 This utility model provides a bottom-cleaning sofa, including a sofa body 1. The bottom of the sofa body 1 is provided with legs that support the sofa body 1, so that the bottom of the sofa body 1 forms a gap with the ground. At this time, the gap is surrounded by openings. For ease of description, the side of the gap near the rear of the sofa body 1 is defined as the first opening side 1001, and the side opposite to the first opening side 1001 is defined as the second opening side 1002. At the same time, the two opening areas located between the first opening side 1001 and the second opening side 1002 are respectively defined as the third opening side 1003 and the fourth opening side 1004, and the third opening side 1003 and the fourth opening side 1004 are arranged opposite to each other.

[0053] Reference Figure 3To clean dust from the floor beneath the sofa, the cleaning sofa also includes a blower module 2 and a vacuum module 3. The blower module 2 has a blowing function, while the vacuum module 3 has a vacuuming function. Specifically, the blower module 2 is located at the bottom of the sofa body 1 and on the first opening side 1001, while the vacuum module 3 is located at the bottom of the sofa body 1 and on the second opening side 1002. The blower module 2 blows air towards the ground to blow dust from the first opening side 1001 to the second opening side 1002. Based on this, the dust from the first opening side 1001 is then absorbed by the vacuum module 3.

[0054] By adopting the above solution, on the one hand, the blowing module 2 blows the dust off the ground, cleaning the floor under the sofa body 1 and greatly reducing the difficulty of cleaning the bottom of the sofa; on the other hand, the vacuuming module 3 collects the dust simultaneously, achieving a good cleaning effect.

[0055] Continue to refer to Figure 3 To remove dust from the ground, the blower module 2 includes a first base 21, a first drive motor 22, and a first blade 23.

[0056] The first seat 21 is fixedly installed at the bottom of the sofa body 1 and is located on the first opening side 1001. At the same time, the first seat 21 has a first airflow channel 212 and an air outlet 211 is provided on the side of the first seat 21 facing the second opening side 1002. The air outlet 211 is connected to the first airflow channel 212.

[0057] Furthermore, the first drive motor 22 is disposed on the first base 21. The first drive motor 22 can be a three-phase asynchronous motor or a servo motor, etc., and the specific motor model that can stably output torque is not limited here. At the same time, the first blade 23 is located in the first guide channel 212, and the output shaft of the first drive motor 22 is fixedly connected to the first blade 23.

[0058] Optionally, in one embodiment, the first blade 23 has a windmill-like structure; in another embodiment, the first blade 23 may also adopt a helical blade structure. The specific structure of the first blade 23 is not limited here. By activating the first drive motor 22, the first blade 23 can rotate, thereby forming airflow within the first guide channel 212. The first guide channel 212 can guide the airflow, causing it to be blown outward through the air outlet 211, generating wind power. It is understood that, to meet the airflow characteristics, a vent can be provided on the first base 21 to satisfy the gas exchange requirements of the first guide channel 212.

[0059] Furthermore, to optimize the cleaning effect, this embodiment also optimizes the air outlet range of the blower module 2. Combined with... Figure 2 As shown, in this embodiment, both the first base 21 and the air outlet 211 are elongated. When installing the first base 21, it is first horizontally positioned and extended from one end of the first opening side 1001 to the other end (equivalent to extending both ends of the first base 21 to the third opening side 1003 and the fourth opening side 1004 respectively). At this time, the air outlet 211 also extends from one end of the first base 21 to the other end. The length of the air outlet 211 is extended, which is equivalent to increasing the coverage area of ​​the air outlet 211.

[0060] Based on this, the first blade 23 in this embodiment adopts a spiral blade structure. In addition, the first guide channel 212 also extends along the length direction of the first base 21, and the first drive motor 22 and the first blade 23 are set in two groups. The two groups of first drive motors 22 and first blades 23 are respectively arranged at both ends of the first guide channel 212. When the two groups of first drive motors 22 and first blades 23 are started, the airflow can be forced into the first guide channel 212 from both ends. Under the guidance of the first guide channel 212, the airflow can be blown out from the air outlet 211.

[0061] Furthermore, to ensure that the airflow can be evenly blown out from the air outlet 211, an air guide pipe is installed inside the first housing 21. The air guide pipe extends along the length of the air outlet 211, and both ends of the air guide pipe are connected to two sets of first drive motors 22 and first blades 23, respectively. At this time, a first guide channel 212 is formed inside the air guide pipe.

[0062] Meanwhile, multiple vent holes are evenly spaced along the length of the air duct. The vent holes are opposite to the air outlet 211. The multiple evenly arranged vent holes can guide the airflow to flow out evenly from the air outlet 211. Because the air outlet 211 has a long length, the airflow effect is significantly improved. The air volume and airflow area are significantly improved, which helps to reduce dead corners and optimize the airflow effect.

[0063] Please refer to it again. Figure 3 To achieve dust adsorption, the dust collection module 3 includes: a second base 31, a second drive motor 32, a second blade 33, and a dirt collection box 34.

[0064] The second seat 31 is fixedly installed at the bottom of the sofa body 1 and is located on the second opening side 1002. At the same time, the second seat 31 has a second airflow channel 311 and an air intake 312 is provided on the side of the second seat 31 facing the first opening side 1001. The air intake 312 is connected to the second airflow channel 311.

[0065] In addition, the second drive motor 32 is disposed on the second base 31. The second drive motor 32 can be a three-phase asynchronous motor or a servo motor, etc., and the motor model that can stably output torque is not specifically limited here. At the same time, the second blade 33 is fixedly connected to the output shaft of the second drive motor 32. The second blade 33 is located in the second guide channel 311. The second blade 33 can be a wind turbine structure or a spiral blade structure, which is not limited here. In this embodiment, a spiral blade structure is used as an example. In addition, the specific arrangement of the second base 31, the second drive motor 32, the second blade 33 and other components is the same as the arrangement of the first base 21, the first drive motor 22 and the first blade 23 and other components, and will not be described in detail here.

[0066] Based on this, the dirt collection box 34 is set on the second base 31 and located at the air intake 312. The dirt collection box 34 is connected to the second guide channel 311. The second drive motor 32 is used to drive the second blade 33 to rotate so that the second blade 33 forms airflow in the second guide channel 311. The second guide channel 311 can guide the airflow and draw the airflow in from the air intake 312. During this process, the dirt collection box 34 continues to filter the dust. The dust is sucked into the dirt collection box 34 to realize the dust suction function.

[0067] Understandably, in order to meet the airflow pattern, ventilation openings can also be provided on the second seat 31 to meet the air intake requirements.

[0068] Furthermore, to optimize the cleaning effect, this embodiment also optimizes the air outlet range of the blower module 2. Specifically, in this embodiment, both the second base 31 and the air intake 312 are elongated. When installing the second base 31, it is first set horizontally and extended from one end of the second opening side 1002 to the other end (equivalent to extending both ends of the second base 31 to the third opening side 1003 and the fourth opening side 1004 respectively). At this time, the air intake 312 also extends from both ends of the second base 31 to the other end, which is equivalent to extending the area of ​​the air intake 312. On this basis, the second blade 33 adopts a columnar impeller structure, and the second blade 33 also extends from one end of the second base 31 to the other end.

[0069] At this time, by starting the first drive motor 22, the airflow generated by the second blade 33 forms a negative pressure at the air intake 312. Since the air intake 312 has a long length, the adsorption area is significantly increased, and the dust adsorption effect is optimized and improved.

[0070] Furthermore, to facilitate regular cleaning of dust, in one embodiment, the dirt collection box 34 includes a perforated box body, the perforated part of which is used for airflow, and the dirt collection box 34 also includes filter cotton, which is installed on the box body. At this time, the shape of the dirt collection box 34 is adapted to the air intake 312 and covers the air intake 312. At this time, the dust is intercepted by the filter cotton to achieve a highly efficient filtration and adsorption effect.

[0071] In addition, to facilitate regular cleaning of the dirt storage box 34, a pull-out groove (not shown in the figure) can be provided on the second base 31, and the dirt storage box 34 can be slidably fitted into the pull-out groove. At this time, the dirt storage box 34 is installed by sliding it into the pull-out groove; in addition, the dirt storage box 34 is removed from the pull-out groove to achieve the disassembly effect. The dirt storage box 34 is detachably connected to the second base 31 through the pull-out groove. When the dirt storage box 34 is removed, it can be cleaned, which is convenient and quick.

[0072] Reference Figure 4 During the dust cleaning process, there is a possibility that the dust may be stirred up, and there is also a possibility that the dust may be blown into the sofa body 1, causing dust to contaminate other parts.

[0073] To address the aforementioned issues, the cleaning sofa also includes an air guide component 4. One side of the air guide component 4 is disposed on the blowing module 2, and the other side is height-adjustable and disposed on the vacuuming module 3. Specifically, in one embodiment, the other side is height-adjustable and disposed on the vacuuming module 3; in another embodiment, one side of the air guide component 4 is height-adjustable and disposed on the blowing module 2, and the other side is height-adjustable and disposed on the vacuuming module 3. Based on the above configuration, the air guide component 4 adjusts the size of the air duct by changing its height, thereby compressing and guiding the airflow generated by the blowing module 2 to achieve a guiding effect and reduce the possibility of turbulence.

[0074] Specifically, in this embodiment, the air guiding assembly 4 includes a first guide wheel lifting module 41, a second guide wheel lifting module 42, and an air guiding layer 43. The first guide wheel lifting module 41 and the second guide wheel lifting module 42 have the same structure. Taking the first guide wheel lifting module 41 as an example, it can adopt a synchronous belt linear module structure, or it can adopt a cylinder module or a lead screw module, etc., as linear module structures. The specific structure of the linear module is existing technology and will not be described in detail here.

[0075] During installation, simply set the first guide wheel lifting module 41 and the second guide wheel lifting module 42 vertically. The first guide wheel lifting module 41 is installed on the blower module 2, and the second guide wheel lifting module 42 is installed on the vacuuming module 3. At this time, one side of the air guide layer 43 is connected to the first guide wheel lifting module 41, and the opposite side is connected to the second guide wheel lifting module 42. Under the combined action of the first guide wheel lifting module 41 and the second guide wheel lifting module 42, the height and tilt of the air guide layer 43 can be adjusted.

[0076] Meanwhile, the air guide layer 43 can be made of an airtight non-woven fabric structure. Preferably, an elastic band can be sewn at one end of the air guide layer 43 to allow the air guide layer 43 to stretch and deform, thereby facilitating subsequent airflow guidance. Based on the above settings, the air guide assembly 4 includes at least two states:

[0077] In the first state, refer to Figure 3 The air guide assembly 4 is inclined downwards from the first opening side 1001 to the second opening side 1002, serving as a progressively compressed air duct to guide dust to the dust collection module 3; in the second state, refer to Figure 4 The air guide component 4 is flattened and attached to the bottom of the sofa body 1 to block dust from entering the sofa body 1, thereby reducing dust flying and preventing dust from entering the bottom of the sofa body 1.

[0078] Preferably, in the first state, the tilt angle of the air guide component 4 is between 10° and 30°. For example, the specific angle of the air guide component 4 can be 10°, 15°, or 30°. When the tilt angle of the air guide component 4 is less than 10°, the air guide angle is usually too small, resulting in an insignificant air guiding effect. When the tilt angle of the air guide component 4 is greater than 30°, the air guide angle is too large, leading to obstruction and loss of airflow. Therefore, when the tilt angle of the air guide component 4 is between 10° and 30°, the air guiding effect is better. It should be explained that the specific tilt angle of the air guide component 4 should be related to the height of the gap and can be adjusted according to different situations of the sofa body 1. There is no limitation on its specific tilt angle.

[0079] Furthermore, referring to Figure 5 In another embodiment, in order to reduce dust from drifting out from the third opening side 1003 and the fourth opening side 1004 of the gap, a baffle 5 is fixedly installed on the bottom of the sofa body 1. There are two sets of baffles 5. The two sets of baffles 5 are in contact with the ground at the same time and respectively cover the third opening side 1003 and the fourth opening side 1004.

[0080] Based on the above settings, the baffle 5 can block the third opening side 1003 and the fourth opening side 1004 to reduce the possibility of dust drifting out from the third opening side 1003 and the fourth opening side 1004. At the same time, it can also guide the airflow, reduce the possibility of airflow turbulence, and further optimize and improve the dust removal effect.

[0081] This utility model addresses the problem of difficult-to-clean bottom surfaces of sofas by modifying the sofa bottom and using a synchronous blowing and suction principle to provide a sofa that automatically cleans the bottom space, creating a clean and comfortable home environment for users.

[0082] Therefore, the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A bottom-cleaning sofa, comprising a sofa body (1), wherein the bottom of the sofa body (1) has a gap with the ground, characterized in that, The gap has a first opening side (1001) and a second opening side (1002) disposed opposite to each other, and further includes: A blower module (2) is disposed at the bottom of the sofa body (1) and located on the first opening side (1001) for blowing dust from the first opening side (1001) to the second opening side (1002). And a dust collection module (3) is disposed at the bottom of the sofa body (1) and located on the second opening side (1002) for adsorbing dust from the first opening side (1001).

2. The bottom-cleaning sofa according to claim 1, characterized in that, It also includes an air guide assembly (4), one side of which is disposed on the blowing module (2), and the other side of which is vertically and vertically disposed on the dust collection module (3); The air guide assembly (4) includes at least two states: In the first state, the air guide assembly (4) is inclined downward from the first opening side (1001) to the second opening side (1002), thereby guiding the dust to the dust collection module (3); In the second state, the air guide assembly (4) is flattened and attached to the bottom of the sofa body (1) to prevent dust from entering the sofa body (1).

3. The bottom-cleaning sofa according to claim 2, characterized in that, The air guide assembly (4) includes: The first guide wheel lifting module (41) is mounted on the blower module (2); The second guide wheel lifting module (42) is mounted on the vacuuming module (3); And the air guide layer (43), which is connected to the first guide wheel lifting module (41) and the second guide wheel lifting module (42) on opposite sides respectively.

4. The bottom-cleaning sofa according to claim 2, characterized in that, In the first state, the tilt angle of the air guide assembly (4) is between 10° and 30°.

5. The bottom-cleaning sofa according to any one of claims 1 to 4, characterized in that, The blower module (2) includes: The first seat (21) is fixedly installed at the bottom of the sofa body (1). The first seat (21) has a first airflow channel (212) and an air outlet (211) communicating with the first airflow channel (212) is opened on one side. A first drive motor (22) is disposed on the first base (21); The first blade (23) is connected to the output shaft of the first drive motor (22) and located in the first guide channel (212). The first drive motor (22) is used to drive the first blade (23) to rotate so that the first blade (23) generates airflow and blows it out through the air outlet (211).

6. The bottom-cleaning sofa according to claim 5, characterized in that, The first seat (21) and the air outlet (211) are both elongated. The first seat (21) extends from one end of the first opening side (1001) to the other end, and the air outlet (211) extends from one end of the first seat (21) to the other end.

7. The bottom-cleaning sofa according to any one of claims 1 to 4, characterized in that, The vacuum module (3) includes: The second seat (31) is fixedly installed at the bottom of the sofa body (1). The second seat (31) has a second airflow channel (311) inside and an air intake (312) communicating with the second airflow channel (311) is opened on one side. The second drive motor (32) is disposed on the second base (31); The second blade (33) is connected to the output shaft of the second drive motor (32) and is located in the second guide channel (311); The second base (31) and the second guide channel (311) are provided. The second drive motor (32) is used to drive the second blade (33) to rotate so that the second blade (33) generates airflow and sucks the dust into the dirt collection box (34).

8. The bottom-cleaning sofa according to claim 7, characterized in that, The second seat (31) and the air inlet (312) are both elongated. The second seat (31) extends from one end of the second opening side (1002) to the other end, and the air inlet (312) extends from one end of the second seat (31) to the other end.

9. The bottom-cleaning sofa according to claim 7, characterized in that, The second seat (31) is provided with a pull-out groove, the dirt storage box (34) slides and fits in the pull-out groove, and the dirt storage box (34) is detachably connected to the second seat (31) through the pull-out groove.

10. The bottom-cleaning sofa according to claim 7, characterized in that, The gap also includes a third opening side (1003) and a fourth opening side (1004) located between the first opening side (1001) and the second opening side (1002). The third opening side (1003) and the fourth opening side (1004) are arranged opposite to each other. A baffle (5) is provided at the bottom of the sofa body (1). The baffle (5) contacts the ground and is used to cover the third opening side (1003) and the fourth opening side (1004).

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