Bed with posture-changeable backrest

Abstract

The utility model discloses a bed with a posture-variable backrest, belongs to the technical field of furniture, and aims to overcome the defect of single backrest adjusting mode of the conventional bed. The bed comprises a bed frame and a backrest, the bed frame comprises a bed head, a jacking assembly is arranged on the bed head and connected with the backrest through a connecting rod mechanism, a guide structure is arranged on the bed head and matched with the connecting rod mechanism, and the guide structure comprises an ascending section and a forward inclining section located at the upper end of the ascending section, so that the backrest ascends along the ascending section and inclines forwards along the forward inclining section from top to bottom. According to the bed disclosed by the utility model, the backrest can be independently lifted and also can be inclined, the adjusting modes are diversified, and different leaning requirements of users can be more easily met.

Description

Technical Field

[0001] The utility model belongs to the technical field of furniture and relates to a bed with a backrest that can be adjusted in posture. Background Art

[0002] In existing soft bed designs, backrest adjustment functions are primarily limited to single rotation or lifting movements. Specifically, some soft bed designs allow users to rotate the backrest through mechanical or electric mechanisms to adjust the backrest's tilt angle, thereby meeting different sitting or lying posture requirements to a certain extent. Other soft bed designs focus on backrest lifting functions, providing users with more flexible support options by raising or lowering the backrest height.

[0003] However, while these individual adjustment methods have improved the comfort and practicality of soft beds to a certain extent, they still have significant limitations. Due to the inability to achieve both lift and rotation simultaneously, existing soft beds are unable to adapt to the complex and ever-changing support needs of the human body. For example, when a user wishes to adjust the backrest height and tilt angle simultaneously for optimal support, existing soft bed adjustment mechanisms often fail to meet this requirement, thus limiting the potential for improving the user experience. Summary of the Invention

[0004] The utility model aims to solve the problems existing in the prior art and proposes a bed with a backrest with a variable posture, so as to overcome the defect that the backrest of the prior bed has a single adjustment method.

[0005] The utility model is achieved in this way:

[0006] A bed with a backrest with a variable posture, comprising a bed frame and a backrest, the bed frame including a headboard, a jacking assembly being provided on the headboard, the jacking assembly being connected to the backrest via a connecting rod mechanism, a guide structure being provided on the headboard to cooperate with the connecting rod mechanism, the guide structure comprising a rising section and a forward-leaning section located at the upper end of the rising section, so that the backrest rises along the rising section and tilts forward from top to bottom along the forward-leaning section.

[0007] The headboard features a guide structure that works in conjunction with the connecting rod mechanism to ensure the backrest moves along a predetermined path. The guide structure comprises an ascending section and a forward tilting section. When the lifting assembly is in operation, it pushes the connecting rod mechanism upward along the ascending section, gradually increasing the height of the backrest. When the connecting rod mechanism reaches the top of the ascending section, it automatically shifts into the forward tilting section. The backrest continues to rise while tilting forward from top to bottom along the forward tilting section. This allows the backrest to be raised and lowered independently, as well as tilted, providing a variety of adjustment options to better meet the user's diverse leaning needs.

[0008] Preferably, the headrest is provided with a mounting groove, a fixing frame is arranged in the mounting groove, the jacking assembly is arranged in the fixing frame, and the guide structure is arranged on the inner side wall of the fixing frame. The fixing frame is arranged in the mounting groove, which not only enhances the overall strength of the headrest, but also provides a stable platform for mounting the jacking assembly, thereby ensuring the stability and reliability of the jacking assembly. The headrest is usually made of wood, and the fixing frame can be made of metal. Arranging the guide structure on the fixing frame can slow down the wear of the guide structure, improve the smoothness of the backrest adjustment, reduce the adjustment noise, and prolong the service life of the bed.

[0009] Preferably, the guide structure is a guide groove, and the connecting rod mechanism is provided with a guide column that moves along the guide groove. The guide groove structure is simple and easy to accurately process. When the guide column moves along the guide groove, the guide column and the guide groove can form a relatively close fit, and the entire movement process is very smooth and stable, thereby reducing noise and vibration and improving user comfort.

[0010] Preferably, the backrest is fixed with a fixed plate, the fixed plate has a hinge part, and the hinge part is hinged with the connecting rod mechanism. The fixed plate provides the stability and strength required for hinging with the connecting rod mechanism. The hinge part allows a certain degree of relative rotation between the two, thereby achieving flexible adjustment of the backrest. When the jacking assembly pushes the connecting rod mechanism to move, the connecting rod mechanism drives the fixed plate and the backrest to rotate through the hinge part, thereby achieving the lifting and tilting adjustment of the backrest.

[0011] Preferably, the jacking assembly comprises a motor, a telescopic rod and a lifting plate, the motor is in transmission connection with the lifting plate through the telescopic rod to drive the lifting plate to move up and down, and the connecting rod mechanism is hinged on the lifting plate. The motor serves as a power source and converts rotary motion into linear motion through the telescopic rod to drive the lifting plate to move up and down. The lifting plate is a key component connecting the motor and the connecting rod mechanism, and it bears the task of transmitting the driving force of the motor to the connecting rod mechanism. At the same time, the connecting rod mechanism is connected to the lifting plate in a hinged manner, so that when the lifting plate moves up and down, the backrest can be lifted and tilted through the connecting rod mechanism.

[0012] Preferably, the connecting rod mechanism comprises an upper connecting rod, a lower connecting rod and a connecting rod hinged between the upper connecting rod and the lower connecting rod, the upper connecting rod has an offset hole, and the connecting rod is hinged at the offset hole, so that when the guide column moves in the forward tilting section, the hinged position of the connecting rod and the upper connecting rod can move in the offset hole.

[0013] The guide column is installed on the connecting rod, and the ends of the upper connecting rod and the lower connecting rod are hinged on the fixed plate and the lifting plate respectively. When the guide column moves upward in the forward tilting section, the lower connecting rod rotates from the tilted state to the horizontal direction to push the lower end of the fixed plate to move forward.

[0014] The upper and lower connecting rods are hinged to the fixed plate and lifting plate, respectively, serving as a bridge connecting the two. A guide column is mounted on the connecting rod and moves along the guide slot to control the backrest's trajectory. As the guide column moves upward in the forward-tilting section of the guide slot, the connecting rod rotates the upper connecting rod, while simultaneously rotating the lower connecting rod from its tilted position to a horizontal position. This rotation of the lower connecting rod pushes the lower end of the fixed plate forward, thereby adjusting the backrest's tilt.

[0015] The offset hole design allows the hinge point between the connecting rod and the upper link to move within the offset hole. This feature allows the linkage mechanism to maintain a more stable and smooth motion when dealing with the complex movement of the guide column in the guide groove, ensuring smooth reclining of the backrest.

[0016] Preferably, the bed frame has a support platform, and when the backrest is in the lower limit position, the lower end of the backrest abuts against the support platform. The design of the support platform provides a solid support base for the backrest. When the backrest is in the lower limit position, its lower end fits tightly against the support platform. This close contact ensures the stability and reliability of the backrest, and the user does not need to worry about the backrest shaking or tilting during use. When the user is not using the bed, the lower limit position of the backrest is also the normal storage position of the backrest, which is the state that the backrest is in for a long time. The support of the support platform can reduce the force on the connecting rod mechanism and the jacking assembly, reduce the risk of deformation of these internal components, and increase the service life of the bed.

[0017] Preferably, the bed frame includes a bedside, and the support platform is located partially on the bedside and partially on the bedside. This ensures that the backrest is firmly supported when in the lower limit position and allows the backrest to extend toward the edge of the bed, which is conducive to increasing the backrest size and improving leaning comfort.

[0018] Preferably, the front end of the upper end of the headboard is curved. Considering the movement trajectory of the backrest during the tilting and flipping process, the curved headboard design can provide sufficient space for the flipping of the backrest, avoiding collision or friction with the headboard during the flipping process, thereby ensuring that the backrest can smoothly and stably complete the tilting and flipping action.

[0019] Preferably, the backrest has a folded edge extending backwards at one end thereof near the side end of the bed frame, and the folded edge is located outside the side end of the bed head. The folded edge can cover the gap between the backrest and the bed head, thereby improving the overall aesthetics of the bed.

[0020] Preferably, the end of the lifting plate has a positioning rod with a positioning column movably embedded in the lifting section. The lifting section is constrained by the positioning column and the positioning rod to avoid the lifting plate from shaking back and forth during lifting, thereby improving the lifting stability.

[0021] The bed provided by the utility model has a linkage mechanism which is lifted along the lifting section, so that the height of the backrest is gradually increased. When the linkage mechanism reaches the top end of the lifting section, it will automatically turn into the forward-inclination section, and at this time, the backrest will be inclined forward from top to bottom along the forward-inclination section while continuing to be lifted. In this way, the backrest can be lifted alone or inclined, and the adjustment mode is various, so that the different leaning needs of users can be more easily met. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a first angle structure schematic view of the bed;

[0023] Figure 2 It is a partial explosion structure schematic view of the bed;

[0024] Figure 3 It is a partial structure schematic view of the bed;

[0025] Figure 4 It is a second angle structure schematic view of the bed;

[0026] Figure 5 It is a structure schematic view of the jacking assembly, the fixing frame and the linkage mechanism;

[0027] Figure 6 It is an explosion structure schematic view of the jacking assembly, the fixing frame and the linkage mechanism;

[0028] Figure 7 It is a partial structure schematic view of the fixing frame;

[0029] Figure 8 It is a structure schematic view of the linkage mechanism;

[0030] Figure 9 It is a structure schematic view of the upper linkage;

[0031] Figure 10 It is a structure schematic view of the jacking assembly with the positioning rod and the fixing frame and the linkage mechanism;

[0032] Figure 11 It is a partial structure schematic view of the bed with the positioning rod.

[0033] Explanation of the accompanying drawings: 100, head of the bed; 110, support platform; 120, mounting groove; 200, lifting assembly; 210, motor; 220, lifting rod; 230, lifting plate; 231, positioning rod; 232, positioning column; 300, connecting rod mechanism; 310, upper connecting rod; 311, offset hole; 320, lower connecting rod; 330, connecting rod; 340, guide column; 400, fixing frame; 410, guide groove; 411, rising section; 412, forward tilting section; 500, backrest; 510, fixing plate; 511, hinged part; 520, folding edge; 600, bed side. DETAILED DESCRIPTION

[0034] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings to make the technical solution of the present invention easier to understand and grasp. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0035] This embodiment provides a bed with a backrest 500 having a variable posture, such as Figure 1-9 As shown, it includes a bed frame and a backrest 500, the bed frame includes a headboard 100, and a lifting component 200 is provided on the headboard 100. The lifting component 200 and the backrest 500 are connected by a connecting rod mechanism 300. The headboard 100 is provided with a guide structure to cooperate with the connecting rod mechanism 300, and the guide structure includes a rising section 411 and a forward-leaning section 412 located at the upper end of the rising section 411, so that the backrest 500 rises along the rising section 411 and tilts forward from top to bottom along the forward-leaning section 412.

[0036] The guide structure cooperates with the connecting rod mechanism 300 to ensure that the backrest 500 can move along a predetermined path. The guide structure includes an ascending section 411 and a forward tilting section 412. When the jacking assembly 200 is working, it pushes the connecting rod mechanism 300 to rise along the ascending section 411, so that the height of the backrest 500 gradually increases. When the connecting rod mechanism 300 reaches the top of the ascending section 411, it will automatically turn into the forward tilting section 412. At this time, the backrest 500 will continue to rise while tilting forward from top to bottom along the forward tilting section 412. In this way, the backrest 500 can be raised and lowered individually, and the backrest 500 can be tilted. The adjustment methods are diverse, making it easier to meet the different leaning needs of users.

[0037] The headboard 100 of this embodiment is provided with two backrests 500. Figure 1 One of the backrests 500 is in the lower limit position, and the other backrest 500 is in the tilted position.

[0038] like Figure 2 、 3As shown in Figures 5 and 6, a mounting groove 120 is provided on the headboard 100, a fixing frame 400 is provided in the mounting groove 120, the lifting assembly 200 is installed in the fixing frame 400, and the guide structure is located on the inner wall of the fixing frame 400. The fixing frame 400 is provided in the mounting groove 120. This structure not only enhances the overall strength of the headboard 100, but also provides a stable platform for installing the lifting assembly 200, thereby ensuring the stability and reliability of the lifting assembly 200. The headboard 100 is usually made of wood, and the fixing frame 400 can be made of metal. Arranging the guide structure on the fixing frame 400 can reduce the wear of the guide structure, improve the smoothness of the adjustment of the backrest 500, reduce the adjustment noise, and increase the service life of the bed. In other optional embodiments, the guide structure can also be directly arranged on the inner wall of the mounting groove 120.

[0039] like Figure 5-7 As shown, the guide structure is a guide groove 410, and the connecting rod mechanism 300 is provided with a guide post 340 that moves along the guide groove 410. The guide groove 410 has a simple structure and is easy to accurately machine. When the guide post 340 moves along the guide groove 410, a relatively tight fit can be formed between the guide post 340 and the guide groove 410, and the entire movement process is very smooth and stable, thereby reducing noise and vibration and improving user comfort.

[0040] like Figure 5 、 6 As shown, a fixed plate 510 is fixed to the backrest 500. The fixed plate 510 has a hinge portion 511, which is hinged to the connecting rod mechanism 300. The fixed plate 510 provides the stability and strength required for the hinge connection with the connecting rod mechanism 300. The hinge portion 511 allows a certain degree of relative rotation between the two, thereby achieving flexible adjustment of the backrest 500. When the jacking assembly 200 pushes the connecting rod mechanism 300 to move, the connecting rod mechanism 300 drives the fixed plate 510 and the backrest 500 to rotate through the hinge portion 511, thereby achieving the lifting and tilting adjustment of the backrest 500.

[0041] like Figure 5 、 6As shown, the lifting assembly 200 includes a motor 210, a lifting rod 220 and a lifting plate 230. The motor 210 is connected to the lifting plate 230 through the lifting rod 220 to drive the lifting plate 230 to move up and down, and the connecting rod mechanism 300 is hinged on the lifting plate 230. The motor 210 serves as a power source, and converts the rotational motion into linear motion through the lifting rod 220, thereby driving the lifting plate 230 to move up and down. The lifting plate 230 is a key component connecting the motor 210 and the connecting rod mechanism 300. It is responsible for transmitting the driving force of the motor 210 to the connecting rod mechanism 300. At the same time, the connecting rod mechanism 300 is connected to the lifting plate 230 in a hinged manner, so that when the lifting plate 230 moves up and down, the backrest 500 can be driven to be lifted and tilted through the connecting rod mechanism 300. In other optional embodiments, a positioning structure can be further provided on the lifting plate to improve the lifting stability. Specifically, as shown in FIG. Figure 10 、 11 As shown, the end of the lifting plate 230 has a positioning rod 231, and the positioning rod 231 has a positioning column 232 that is movably embedded in the rising section 411. The positioning column 232 moves along the rising section 411. The rising section 411 constrains the lifting plate 230 through the positioning column 232 and the positioning rod 231, preventing the lifting plate 230 from rocking back and forth during the lifting process and improving the lifting stability.

[0042] like Figure 5 、 6 As shown in Figures 8 and 9, the connecting rod mechanism 300 includes an upper connecting rod 310, a lower connecting rod 320 and a connecting rod 330 hinged between the upper connecting rod 310 and the lower connecting rod 320, the upper connecting rod 310 has an offset hole 311, and the connecting rod 330 is hinged at the offset hole 311 so that when the guide column 340 moves in the forward tilting section 412, the hinge position of the connecting rod 330 and the upper connecting rod 310 can move in the offset hole 311; the guide column 340 is installed on the connecting rod 330, and the two ends of the upper connecting rod 310 and the lower connecting rod 320 are hinged on the fixed plate 510 and the lifting plate 230 respectively, and when the guide column 340 moves upward in the forward tilting section 412, the lower connecting rod 320 rotates from the inclined state to the horizontal direction to push the lower end of the fixed plate 510 to move forward.

[0043] The upper connecting rod 310 and the lower connecting rod 320 are hinged to the fixed plate 510 and the lifting plate 230, respectively, serving as a bridge connecting the two. A guide post 340 is mounted on the connecting rod 330 and moves along the guide slot 410 to control the motion trajectory of the backrest 500. When the guide post 340 moves upward in the forward-leaning section 412 of the guide slot 410, the connecting rod 330 drives the upper connecting rod 310 to rotate, while the lower connecting rod 320 also rotates from its tilted position to the horizontal direction. During this process, the rotation of the lower connecting rod 320 pushes the lower end of the fixed plate 510 forward, thereby adjusting the forward tilt of the backrest 500.

[0044] Due to the design of the offset hole 311, the hinged position of the connecting rod 330 and the upper connecting rod 310 can move within the offset hole 311. This feature allows the linkage mechanism 300 to maintain a more stable and smooth motion state when dealing with the complex movement of the guide column 340 in the guide groove 410, ensuring smooth tilting of the backrest 500.

[0045] like Figure 1 、 4 As shown, the bed frame is provided with a support platform 110, and when the backrest 500 is in the lower limit position, the lower end of the backrest 500 abuts against the support platform 110. The design of the support platform 110 provides a solid support base for the backrest 500. When the backrest 500 is in the lower limit position, its lower end fits tightly against the support platform 110. This close contact ensures the stability and reliability of the backrest 500, and the user does not need to worry about the backrest 500 shaking or tilting during use. When the user is not using the bed, the lower limit position of the backrest 500 is also the normal storage position of the backrest 500, which is the state in which the backrest 500 is for a relatively long time. The support of the support platform 110 can reduce the force on the connecting rod mechanism 300 and the lifting assembly 200, reduce the risk of deformation of these internal components, and increase the service life of the bed.

[0046] Furthermore, the bed frame includes a bedside 600, and the support platform 110 is partially located on the bedhead 100 and partially located on the bedside 600. This ensures that the backrest 500 is firmly supported when in the lower limit position and allows the backrest 500 to extend toward the edge of the bed, thereby increasing the size of the backrest 500 and improving leaning comfort.

[0047] like Figure 2 、 3 As shown, the front end of the upper end of the headboard 100 is curved. Considering the movement trajectory of the backrest 500 during the tilting and flipping process, the curved headboard 100 design can provide sufficient space for the flipping of the backrest 500, avoiding collision or friction with the headboard 100 during the flipping process, thereby ensuring that the backrest 500 can complete the tilting and flipping movement smoothly and steadily.

[0048] like Figure 1 、 4 As shown, the backrest 500 has a folded edge 520 extending backward at one end near the side of the bed frame, and the folded edge 520 is located outside the side of the headboard 100. The folded edge 520 can cover the gap between the backrest 500 and the headboard 100, thereby improving the overall aesthetics of the bed.

Claims

1. A bed with a backrest with a variable posture, comprising a bed frame and a backrest (500), wherein the bed frame includes a headboard (100), characterized in that: The bed head (100) is provided with a lifting assembly (200), the lifting assembly (200) and the backrest (500) are connected via a connecting rod mechanism (300), the bed head (100) is provided with a guide structure cooperating with the connecting rod mechanism (300), the guide structure comprising a rising section (411) and a forward tilting section (412) located at the upper end of the rising section (411), so that the backrest (500) rises along the rising section (411) and tilts forward from top to bottom along the forward tilting section (412).

2. A bed with a variable backrest posture according to claim 1, characterized in that: The bed head (100) is provided with a mounting groove (120), a fixing frame (400) is provided in the mounting groove, the lifting assembly (200) is installed in the fixing frame (400), and the guide structure is located on the inner side wall of the fixing frame (400).

3. The bed with a variable backrest posture according to claim 2, characterized in that: The guide structure is a guide groove (410), and a guide column (340) is provided on the connecting rod mechanism (300) and moves along the guide groove (410).

4. The bed with a variable backrest posture according to claim 3, characterized in that: A fixing plate (510) is fixed on the backrest (500), and a hinge portion (511) is provided on the fixing plate (510), and the hinge portion (511) is hinged to the connecting rod mechanism (300).

5. The bed with a variable backrest posture according to claim 4, characterized in that: The lifting assembly (200) comprises a motor (210), a lifting rod (220) and a lifting plate (230); the motor (210) is connected to the lifting plate (230) via the lifting rod (220) to drive the lifting plate (230) to move up and down; and the connecting rod mechanism (300) is hinged on the lifting plate (230).

6. The bed with a variable backrest posture according to claim 5, characterized in that: The connecting rod mechanism comprises an upper connecting rod (310), a lower connecting rod (320), and a connecting rod (330) hinged between the upper connecting rod (310) and the lower connecting rod (320), wherein the upper connecting rod (310) is provided with an offset hole (311), and the connecting rod (330) is hinged at the offset hole (311), so that when the guide column moves in the forward tilting section, the hinged position of the connecting rod (330) and the upper connecting rod (310) can move within the offset hole (311); The guide column (340) is installed on the connecting rod (330), and the ends of the upper connecting rod (310) and the lower connecting rod (320) are hinged on the fixed plate (510) and the lifting plate (230) respectively. When the guide column (340) moves upward in the forward tilting section (412), the lower connecting rod (320) rotates from the tilted state to the horizontal direction to push the lower end of the fixed plate (510) to move forward.

7. The bed with a variable backrest posture according to claim 5, characterized in that: The end of the lifting plate (230) is provided with a positioning rod (231), and the positioning rod (231) is provided with a positioning column (232) which is movably embedded in the ascending section (411).

8. The bed with a variable backrest posture according to claim 1, characterized in that: The bed frame is provided with a support platform (110), and when the backrest (500) is at the lower limit position, the lower end of the backrest (500) abuts against the support platform (110).

9. The bed with a variable backrest posture according to claim 8, characterized in that: The bed frame includes a bed side (600), and the support platform (110) is partially located on the bed head (100) and partially located on the bed side (600).

10. The bed with a variable backrest posture according to claim 1, characterized in that: The front end portion of the upper end portion of the bed head (100) is arc-shaped; An end portion of the backrest (500) close to the side end of the bed frame has a folded edge (520) extending backwards, and the folded edge (520) is located outside the side end of the bed head (100).

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