Multifunctional three-folding sofa bed

Abstract

The utility model discloses a multifunctional three-fold sofa bed, relates to the technical field of sofa beds, and comprises a sofa bed body, a sofa backup plate is fixedly installed on the rear side of the top of the sofa bed body, lifting mechanisms are fixedly installed on the two sides of the sofa backup plate, and multifunctional armrest assemblies are fixedly installed on the front faces of the lifting mechanisms. By adopting the structure, the device is provided with the multifunctional handrail assembly, when the device is used, the handrail plate is pulled to drive the connecting plate, so that the base block is separated from the limiting hole, the limiting spring is compressed, the handrail bedplate is rotated to a transverse state, then the pulling plate is loosened, the limiting spring is reset to fix the handrail bedplate, and the driving motor is started to drive the screw rod to rotate; the sliding blocks are driven to slide in the sliding grooves, the handrail bedplate can be adjusted to move up and down, the height of the handrail bedplate can be adjusted, the handrail bedplate can provide a supporting tabletop for the sofa bed body after being turned over, a notebook computer can be conveniently used, a user can read books or eat food, the use functionality of the sofa bed is greatly improved, and the requirements of different scenes of the user are met.

Description

Technical Field

[0001] This utility model belongs to the field of sofa bed technology, and specifically relates to a multifunctional three-fold sofa bed. Background Technology

[0002] A three-fold sofa bed is a highly functional piece of furniture. It consists of a footboard frame, a main seat frame, a back frame, adjustable legs, and fixed legs. The frame features support and webbing with an elastic covering. The back and footboard frames are connected to the main seat frame via casters and springs for adjustable angles. It folds up easily and is compact when folded, taking up nearly half the space of a typical bed, yet offering the same comfort as a real sofa. It can function as a sofa for daily rest and can be unfolded into a bed when needed, providing a sleeping space and meeting the needs of various occasions. Suitable for people of all ages and backgrounds, it is especially ideal for small apartments, effectively saving space and maximizing space utilization.

[0003] Chinese patent CN216602237U discloses a multifunctional three-fold sofa bed, which includes a body. A connecting column is fixedly connected inside the body, and a first support plate is rotatably connected to the connecting column. The first support plate is rotatably connected to a second support plate via a hinge, and the second support plate is rotatably connected to a third support plate via a hinge. Two symmetrical brackets are fixedly connected inside the body, and the third support plate is placed on the brackets. Slide grooves are provided on both sides of the third support plate at the top of the body. This utility model enables the device to store items by setting up a storage box and a door panel, thus achieving the first point of expanding its functions. By setting up a storage box, slide rail, slider, placement plate, card block and limiting post, the user can put the food or other items that need to be eaten or used in advance when using the device, without having to get down to retrieve them. This also avoids the problem of food being placed on the sofa bed and causing mess, thus achieving the second point of expanding its functions.

[0004] While the aforementioned sofas offer some storage functionality, it's clear from practical use that simply adding storage cannot fully meet diverse needs. Their functionality is relatively limited. Currently available sofas have several shortcomings in overall use. For example, when people are lying on the sofa and want to read or use a laptop, the sofa lacks the necessary support structure. This means that using a laptop on the sofa is not possible without a separate laptop stand, which undoubtedly increases the inconvenience and hassle of use. Therefore, such sofas present numerous inconveniences in practical use and urgently need improvement and optimization to enhance their functionality and practicality, better meeting people's needs in different scenarios. Utility Model Content

[0005] In response to the problems mentioned in the background art, the purpose of this utility model is to provide a multifunctional three-fold sofa bed to solve the problem that existing sofas lack auxiliary computer support structures during use, making it impossible to use a laptop or place food on the sofa, etc.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0007] A multifunctional three-fold sofa bed includes a sofa bed body, a sofa back panel fixedly installed on the top rear side of the sofa bed body, lifting mechanisms fixedly installed on both sides of the sofa back panel, and a multifunctional armrest assembly fixedly installed on the front of the lifting mechanism.

[0008] The multifunctional handrail assembly includes a fixed plate, which is fixedly installed on the front of the lifting mechanism. A limiting mechanism is fixedly installed on the front of the fixed plate, and a handrail platform is fixedly installed on the front of the limiting mechanism. A support mechanism is movably installed on the inner front side of the handrail platform, and the handrail platform is L-shaped.

[0009] The limiting mechanism includes a turntable and limiting holes. The turntable is rotatably connected to the front of the fixed plate. A concave seat is fixedly installed on one side of the front of the turntable. A limiting spring is fixedly connected to the inner side of the concave seat. A base block is fixedly installed on the rear side of the limiting spring. A limiting pin is fixedly installed on the rear side of the base block. The limiting holes are arranged in a ring at equal intervals on the front of the fixed plate. The rear end of the limiting pin is inserted into the inner side of the limiting hole. A connecting plate is fixedly installed on the front of the base block. A handrail plate is fixedly connected to the end of the connecting plate through the concave seat.

[0010] As a preferred technical solution, a soft cushion is fixedly installed on the top of the sofa bed body, and the overall cross-sectional shape of the soft cushion is wavy.

[0011] As a preferred technical solution, a storage drawer is slidably connected to the lower front end of the sofa bed body, and the outer corners of the sofa back panel are all rounded.

[0012] As a preferred technical solution, a handrail block is fixedly installed in the middle of the inner side of the handrail platform. The handrail block is arranged in a narrow ellipse shape and its outer surface corners are also rounded.

[0013] As a preferred technical solution, the support mechanism includes a storage groove, which is opened at the inner front end of the armrest platform. A hinge seat is fixedly installed on the inner side of the storage groove. A sleeve is hinged to the inner side of the hinge seat. A slide rod is slidably connected to the inner side of the sleeve. A hand-tightening bolt is threaded to the lower inner end of the sleeve. Positioning holes are linearly arranged at equal intervals on the inner side of the slide rod. The end of the hand-tightening bolt is inserted into the inner side of the positioning hole.

[0014] As a preferred technical solution, two support plates are fixedly installed in the center of the front of the storage drawer. The top of the support plate is provided with a groove. The bottom of the slide rod can be inserted into the inside of the groove. A cover plate is hinged to the inside of the storage groove, and the cover plate is magnetically connected to the armrest plate through a magnetic sheet.

[0015] As a preferred technical solution, the lifting mechanism includes a slide rail, which is formed on both sides of the front of the sofa back panel. A drive motor is fixedly installed at the bottom of the slide rail, and a lead screw is fixedly installed at the output end of the drive motor. The lead screw is rotatably connected to the inner side of the slide rail, and a slider is threadedly connected to the outer surface of the lead screw. The front of the slider is fixedly connected to the back of the fixed plate.

[0016] In summary, the present invention has the following main advantages:

[0017] First, this device is equipped with a multi-functional armrest assembly. When in use, pulling out the armrest plate moves the connecting plate to disengage the base block from the limiting hole, compressing the limiting spring. After rotating the armrest platform to the horizontal position, the pulling plate is released, and the limiting spring returns to its original position, fixing the armrest platform. The drive motor is started, which drives the lead screw to rotate, and the drive slider slides in the slide groove, adjusting the vertical displacement of the armrest platform. The armrest platform can be height adjusted and can also provide a support platform for the sofa bed body after being flipped over, making it convenient to use a laptop, read a book, or eat, etc., greatly improving the functionality of the sofa bed and meeting the needs of users in different scenarios.

[0018] Secondly, this device is also equipped with a support mechanism. When the armrest platform is horizontal, open the storage slot cover, rotate the sleeve downwards, pull the slide rod into the support plate slot, and twist the hand-tightening bolt to fix the sleeve and slide rod, which helps to support and reinforce the armrest platform, improving its load-bearing capacity. The storage drawer can store items to save space and improve the functionality of the sofa bed. The soft cushion setting further enhances the comfort of the top of the sofa bed, bringing a pleasant experience to the user and making it convenient for use in various scenarios. This support mechanism makes this device perform excellently during use, enhancing its stability and practicality. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a top view of the structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the multifunctional handrail component of this utility model;

[0022] Figure 4 This is a utility model Figure 3 A magnified structural diagram at point A;

[0023] Figure 5 This is a schematic diagram of the support mechanism structure of this utility model.

[0024] Reference numerals: 1. Sofa bed body; 2. Sofa backrest; 3. Lifting mechanism; 31. Slide rail; 32. Drive motor; 33. Lead screw; 34. Slider; 4. Cushion; 5. Storage drawer; 6. Multifunctional armrest assembly; 61. Fixing plate; 62. Limiting mechanism; 621. Turntable; 622. Limiting hole; 623. Concave seat; 624. Limiting spring; 625. Base block; 626. Limiting pin; 627. Connecting plate; 628. Armrest board; 63. Armrest platform; 64. Support mechanism; 641. Storage slot; 642. Hinge seat; 643. Sleeve; 644. Slide rod; 645. Slot; 646. Hand-tightening bolt; 647. Positioning hole; 648. Support plate; 65. Armrest block. Detailed Implementation

[0025] Example

[0026] refer to Figures 1 to 5 This embodiment of a multifunctional three-fold sofa bed includes a sofa bed body 1, a sofa back panel 2 fixedly installed on the top rear side of the sofa bed body 1, a lifting mechanism 3 fixedly installed on both sides of the sofa back panel 2, and a multifunctional armrest assembly 6 fixedly installed on the front of the lifting mechanism 3.

[0027] The multi-functional handrail assembly 6 includes a fixing plate 61, which is fixedly installed on the front of the lifting mechanism 3. A limiting mechanism 62 is fixedly installed on the front of the fixing plate 61. A handrail platform 63 is fixedly installed on the front of the limiting mechanism 62. A support mechanism 64 is movably installed on the inner side of the front end of the handrail platform 63. The handrail platform 63 is L-shaped.

[0028] The limiting mechanism 62 includes a turntable 621 and limiting holes 622. The turntable 621 is rotatably connected to the front of the fixed plate 61. A concave seat 623 is fixedly installed on one side of the front of the turntable 621. A limiting spring 624 is fixedly connected to the inner side of the concave seat 623. A base block 625 is fixedly installed on the rear side of the limiting spring 624. A limiting pin 626 is fixedly installed on the rear side of the base block 625. The limiting holes 622 are evenly spaced and arranged in a ring on the front of the fixed plate 61. The rear end of the limiting pin 626 is inserted into the inner side of the limiting hole 622. A connecting plate 627 is fixedly installed on the front of the base block 625. An armrest plate 628 is fixedly connected to the end of the connecting plate 627 through the concave seat 623. Lifting mechanisms are provided on both sides of the sofa back panel 2 on the rear top of the sofa bed body 1. 3. The multi-functional armrest assembly 6 is installed on the front, which enhances the overall functionality and practicality. The fixing plate 61 in the multi-functional armrest assembly 6 provides stable support for the limiting mechanism 62 and the armrest platform 63. The turntable 621 of the limiting mechanism 62 can rotate flexibly. The limiting spring 624 in the concave seat 623, together with the base block 625 and the limiting pin 626, can effectively limit and fix the armrest platform 63, making it easy to adjust the angle and position. The armrest platform 63 is L-shaped and has a support mechanism 64 on the inner side of the front end, which further enhances stability and practicality. The overall design not only meets the basic functions of the sofa, but also provides more convenience for users in different scenarios, such as using it as a support table for using a laptop or reading, thus improving space utilization and user comfort.

[0029] refer to Figures 1-2A cushion 4 is fixedly installed on the top of the sofa bed body 1. The overall cross-sectional shape of the cushion 4 is wavy. A storage drawer 5 is slidably connected to the lower front of the sofa bed body 1. The outer corners of the sofa backrest 2 are all rounded. An armrest block 65 is fixedly installed in the middle of the inner side of the armrest platform 63. The armrest block 65 is a long and narrow oval shape, and its outer surface corners are also rounded. The wavy cross-sectional shape of the cushion 4 on the top of the sofa bed body 1 not only increases comfort but also provides a certain massage effect, allowing the user to rest more comfortably. Relax, the storage drawer 5 at the bottom front is convenient for storing items, saving indoor space and making the room more tidy and organized. The outer corners of the sofa back panel 2 are rounded to avoid potential collision injuries from sharp edges and improve safety. The armrest block 65 in the middle of the inner side of the armrest panel 63 is a long and narrow oval shape with rounded outer corners, which conforms to ergonomic design, is comfortable to grip, and also ensures safety during use and prevents accidental scratches. The overall design focuses on practicality while fully considering the user's comfort and safety needs.

[0030] refer to Figures 1-5 The support mechanism 64 includes a storage slot 641, which is located on the inner front end of the armrest platform 63. A hinge seat 642 is fixedly installed on the inner side of the storage slot 641. A sleeve 643 is hinged to the inner side of the hinge seat 642. A slide rod 644 is slidably connected to the inner side of the sleeve 643. A hand-tightening bolt 646 is threaded to the lower inner end of the sleeve 643. Positioning holes 647 are linearly arranged at equal intervals on the inner side of the slide rod 644. The end of the hand-tightening bolt 646 is inserted into the inner side of the positioning hole 647. Two support plates 648 are fixedly installed in the center of the front of the storage drawer 5. A groove 645 is opened on the top of the support plate 648. The bottom of the slide rod 644 can be inserted into the inner side of the groove 645. A cover plate is hinged to the inner side of the storage slot 641, and the cover plate is magnetically connected to the armrest platform 63 through a magnetic sheet. The storage slot 641 at the front provides storage space for the support mechanism 64, saving space when not in use and making the sofa bed neater and more aesthetically pleasing. The hinge seat 642 facilitates the rotation and angle adjustment of the sleeve 643. The sliding connection design of the sleeve 643 with the slide rod 644 and the internal support rod allows for flexible length adjustment to meet different needs. The hand-tightening bolt 646, in conjunction with the positioning hole 647, can quickly fix the length of the slide rod 644, making operation simple. When support is needed, the bottom of the slide rod 644 can be inserted into the slot 645 at the top of the support plate 648, providing stable support for the armrest platform 63 and enhancing its load-bearing capacity. The cover plate hinged to the inside of the storage slot 641 is magnetically connected to the armrest platform 63 via a magnetic sheet, fitting tightly when closed to prevent dust from entering the storage slot 641 and also enhancing the overall aesthetics of the sofa bed.

[0031] refer to Figures 1-2The lifting mechanism 3 includes a slide 31, which is located on both sides of the front of the sofa backrest 2. A drive motor 32 is fixedly installed at the bottom of the slide 31, and a lead screw 33 is fixedly installed at the output end of the drive motor 32. The lead screw 33 is rotatably connected to the inner side of the slide 31, and a slider 34 is threadedly connected to the outer surface of the lead screw 33. The front of the slider 34 is fixedly connected to the back of the fixed plate 61. The slide 31 on both sides of the front of the sofa backrest 2 provides a stable track for the lifting operation. The drive motor 32 at the bottom of the slide 31 provides power for the lifting. The lead screw 33 at the output end is rotatably connected to the inner side of the slide 31 and threadedly connected to the slider 34, making the lifting process smooth and precise. The drive motor 32 drives the lead screw 33 to rotate, thereby driving the slider 34 to move up and down in the slide 31, which in turn drives the fixed plate 61 and the multi-functional armrest assembly 6 to adjust the height. This design can meet the needs of different users, allowing them to adjust the height of the armrest 628 according to their personal habits and usage scenarios, improving the comfort and flexibility of the sofa bed and bringing a better user experience.

[0032] Operating principle and advantages: By setting up the multi-functional armrest assembly 6, this device can exhibit excellent performance during actual use. During use, by pulling out the armrest plate 628, the connecting plate 627 is moved forward. As the connecting plate 627 moves forward, the base block 625 is pulled forward and disengaged from the limiting hole 622. During this process, the limiting spring 624 is in a compressed state. Then, the armrest platform 63 is rotated towards the inside of the sofa bed body 1. At this time, the armrest platform 63 is in a horizontal position. Then, the pull plate is released, and the limiting spring 624 will quickly return to its original position, causing the base block 625 to push the limiting pin 626 into the limiting hole 622. This allows the armrest platform in the horizontal position to be adjusted. The plate 63 is securely fixed. In addition, by starting the drive motor 32, the lead screw 33 can be driven to rotate. After the lead screw 33 rotates, the slider 34 can be driven to slide smoothly inside the slide groove 31. By adjusting the sliding of the slider 34, the armrest platform 63 can be moved up and down. In this way, the armrest platform 63 of this device can not only be height adjusted, but also provide a stable support surface when it is on the sofa bed body 1 by flipping the armrest platform 63. Whether it is using a laptop for office work, reading, eating, etc., it becomes extremely convenient. This design can further improve the functionality of this sofa bed and meet the diverse needs of users in different scenarios.

[0033] By setting up the support mechanism 64, the device performs better during use. When the armrest platform 63 is in a horizontal position, open the cover plate inside the storage slot 641. At this time, rotate the sleeve 643 on the hinge seat 642 so that it faces downward. Then, pull the slide rod 644 downward and insert the lower end of the slide rod 644 into the slot 645 on the support plate 648. Next, turn the hand-tightening bolt 646 so that the end of the hand-tightening bolt 646 is inserted into the inside of the positioning hole 647. Through this operation, the sleeve 643 and the slide rod 644 can be effectively fixed. By fixing the sleeve 643 and the slide rod 644, the device can be effectively fixed. The sliding rod 644 can assist in supporting and reinforcing the armrest platform 63, giving the armrest platform 63 excellent stability. This improves the load-bearing capacity of the armrest platform 63, ensuring that it can safely and reliably bear the weight of various items during use. In addition, the storage drawer 5 can be used to store items, thereby saving indoor space and further improving the functionality of this sofa bed. Furthermore, the use of the soft cushion 4 can further improve the comfort of the top of the sofa bed body 1, bringing a more pleasant user experience and facilitating the use of this device in various scenarios.

[0034] The main body 1 of this sofa bed is based on existing technology, specifically a push-pull folding bed. It consists of a fixed frame, a movable bed board, guide rails, a support structure, and a locking device. Its operating principle is to achieve the extension and retraction function of the bed body by means of the guide rails. When used normally as a sofa, the movable bed board is tucked inside the fixed frame, without occupying extra space. When it needs to be used as a bed, the movable bed board is pulled outward, and the movable bed board slides smoothly out along the guide rails, increasing the overall length of the bed. At the same time, the support structure provides support after the movable bed board is fully extended, ensuring the stability of the bed during use. When it is time to return to the sofa state, the support structure is released, the movable bed board is pushed back into the fixed frame along the guide rails, and then the locking device fixes the movable bed board in the initial position, completing the folding operation. Since this is existing technology, it will not be described in detail here.

Claims

1. A multifunctional three-fold sofa bed, comprising a sofa bed body, characterized in that: A sofa back panel is fixedly installed on the top rear side of the sofa bed body, and lifting mechanisms are fixedly installed on both sides of the sofa back panel. A multi-functional armrest assembly is fixedly installed on the front of the lifting mechanism. The multifunctional handrail assembly includes a fixed plate, which is fixedly installed on the front of the lifting mechanism. A limiting mechanism is fixedly installed on the front of the fixed plate, and a handrail platform is fixedly installed on the front of the limiting mechanism. A support mechanism is movably installed on the inner front side of the handrail platform, and the handrail platform is L-shaped. The limiting mechanism includes a turntable and limiting holes. The turntable is rotatably connected to the front of the fixed plate. A concave seat is fixedly installed on one side of the front of the turntable. A limiting spring is fixedly connected to the inner side of the concave seat. A base block is fixedly installed on the rear side of the limiting spring. A limiting pin is fixedly installed on the rear side of the base block. The limiting holes are arranged in a ring at equal intervals on the front of the fixed plate. The rear end of the limiting pin is inserted into the inner side of the limiting hole. A connecting plate is fixedly installed on the front of the base block. A handrail plate is fixedly connected to the end of the connecting plate through the concave seat.

2. The multifunctional three-fold sofa bed according to claim 1, characterized in that: A soft cushion is fixedly installed on the top of the sofa bed body, and the overall cross-sectional shape of the soft cushion is wavy.

3. The multifunctional three-fold sofa bed according to claim 1, characterized in that: The sofa bed body has a storage drawer that slides to the lower front end, and the outer corners of the sofa back panel are all rounded.

4. A multifunctional three-fold sofa bed according to claim 1, characterized in that: The handrail block is fixedly installed in the middle of the inner side of the handrail platform. The handrail block is set in a narrow oval shape and its outer surface corners are also set in an arc shape.

5. A multifunctional three-fold sofa bed according to claim 3, characterized in that: The support mechanism includes a storage slot, which is located at the inner front end of the armrest platform. A hinge seat is fixedly installed on the inner side of the storage slot. A sleeve is hinged to the inner side of the hinge seat. A slide rod is slidably connected to the inner side of the sleeve. A hand-tightening bolt is threaded to the lower inner end of the sleeve. Positioning holes are linearly arranged at equal intervals on the inner side of the slide rod. The end of the hand-tightening bolt is inserted into the inner side of the positioning hole.

6. A multifunctional three-fold sofa bed according to claim 5, characterized in that: Two support plates are fixedly installed in the center of the front of the storage drawer. The top of the support plate has a groove. The bottom of the slide rod can be inserted into the inside of the groove. The inside of the storage groove is hinged with a cover plate, and the cover plate is magnetically connected to the armrest plate through a magnetic sheet.

7. A multifunctional three-fold sofa bed according to claim 1, characterized in that: The lifting mechanism includes a slide rail, which is opened on both sides of the front of the sofa back panel. A drive motor is fixedly installed at the bottom of the slide rail, and a lead screw is fixedly installed at the output end of the drive motor. The lead screw is rotatably connected to the inner side of the slide rail, and a slider is threadedly connected to the outer surface of the lead screw. The front of the slider is fixedly connected to the back of the fixed plate.

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