Sofa bed with limiting groove

Abstract

The utility model relates to a sofa bed with limiting groove, the limiting component of existing sofa bed is easy to separate. The utility model discloses fixed seat and movable seat, movable seat includes upper frame seat and lower frame seat, and lower frame seat can reciprocate and switch between first use station and second use station, and lower frame seat moves to second use station and is located with upper frame seat through limiting component and is clamped and is limited, and limiting component includes limiting block and limiting groove, and limiting block is located with limiting groove and is clamped and positioned to limit lower frame seat and excessively move forward. Limiting component includes limiting block and the limiting groove that opens to rear, and limiting block is horizontally inserted into limiting groove, and both play the role of forward and backward limiting, ensure that upper frame seat and lower frame seat are forward and backward linkage, also play the role of preventing jumping to lower frame seat, ensure that limiting component can be reliable all the time, and improve use reliability.

Description

Technical Field

[0001] This utility model relates to the field of bedding, specifically to a sofa bed. Background Technology

[0002] The existing sofa bed includes a fixed seat and a movable seat. The fixed seat includes two symmetrically arranged armrests and a backrest located around the perimeter of the armrests. The movable seat includes an upper frame connected to the fixed seat and a lower frame located within the upper frame. The bottom of the upper frame has a cavity for the lower frame to move back and forth. A limiting component is provided between the upper frame and the lower frame to limit the lower frame from moving too far forward relative to the upper frame. The limiting component includes a front block located at the front of the upper frame and a rear block located at the rear of the lower frame. When the lower frame moves forward, it abuts against the front block through the rear block, which limits the lower frame from moving too far forward and drives the upper frame to move forward.

[0003] The lower frame has a vertically retractable seat cushion at its top. When the lower frame moves forward and protrudes from the upper frame, the reclining cushion needs to be raised to align with the top surface of the upper frame, allowing the sofa bed to switch to bed mode. Because the rear wall of the front block and the front wall of the rear block are horizontally abutted and limited, raising the reclining cushion can easily cause the lower frame to bounce, leading to a vertical separation between the front wall of the rear block and the rear wall of the front block. This affects the limiting effect of the limiting components, causing the lower frame to move too far forward and detach from the upper frame, impacting reliability.

[0004] Furthermore, since the upper frame needs to move forward under the pulling action of the lower frame, the force of the lower frame moving forward will be transmitted to the upper frame through the front and rear blocks that are in contact with each other. When the force is too large or the direction of the force is deflected, the front and rear blocks will detach, which will cause the upper frame to be unable to move in conjunction with the lower frame, affecting the reliability of use. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a sofa bed with a limiting groove. The limiting component includes a limiting block and a limiting groove that opens to the rear. The limiting block is inserted horizontally into the limiting groove, which not only serves to limit movement in the front and rear directions, ensuring that the upper frame and the lower frame move in the front and rear directions, but also prevents the lower frame from jumping, ensuring that the limiting component is always reliably connected and improving the reliability of use.

[0006] This utility model is achieved through the following means: a sofa bed with a limiting groove, including a fixed seat and a movable seat. The movable seat includes an upper frame seat and a lower frame seat disposed within the upper frame seat. The lower frame seat can reciprocate between a first use position hidden within the upper frame seat and a second use position exposed in front of the upper frame seat. When the lower frame seat moves to the second use position, it is locked and limited by a limiting component with the upper frame seat. The limiting component includes a limiting block disposed at the rear of the lower frame seat and a limiting groove disposed at the front of the upper frame seat and exposed rearward. The limiting block is locked and positioned by the limiting groove to limit the lower frame seat from moving too far forward. The limiting component includes a limiting block and a rearward-opening limiting groove. The limiting block is inserted horizontally into the limiting groove, and the front wall of the limiting block abuts against the front wall of the limiting groove, which plays a role in front-back limiting and ensures that the upper frame seat and the lower frame seat move forward and backward. The top wall of the limiting block abuts against the top wall of the limiting groove, which plays a role in preventing the lower frame seat from jumping. This ensures that the limiting component is always reliably connected, improves the reliability of use, and ensures that the movable seat can switch freely within a preset range.

[0007] Preferably, the limiting groove includes an end limiting surface that restricts excessive horizontal forward movement of the limiting block, and a top limiting surface and a bottom supporting surface that restrict vertical disengagement of the limiting block, so that the limiting block is engaged and limited by the end limiting surface, the top limiting surface, and the bottom supporting surface. The groove wall of the limiting groove forms an end limiting surface that can abut against the front wall of the limiting block, a top limiting surface that can abut against the top wall of the limiting block, and a bottom supporting surface that can abut against the bottom surface of the limiting block, which limits both the forward movement and vertical jump of the lower frame.

[0008] Preferably, the end-positioning limiting surface is inclined, with its top edge tilting backward and the middle of the front wall of the limiting block protruding forward. This ensures that the end-positioning limiting surface matches and fits the front wall of the limiting block, thereby increasing the contact area and improving the resistance limiting effect. It also uses the inclined wall surface of the front wall of the limiting block to guide the limiting block into the limiting groove, thus improving assembly convenience.

[0009] Preferably, the top limiting surface and the bottom supporting surface are horizontal, and the distance between the top limiting surface and the bottom supporting surface is greater than the height of the limiting block, so as to ensure that the limiting block can move freely in the limiting groove, prevent jamming, improve the convenience of disassembly and assembly, and also ensure that the limiting block can smoothly disengage from the limiting groove when the lower frame seat is reset to the first use position.

[0010] Preferably, the top and bottom surfaces of the limiting block are both horizontal, which can effectively increase the contact area between the limiting block and the corresponding groove wall, thereby improving the limiting effect, and can also effectively reduce the resistance when the limiting block slides in the limiting groove, ensuring that the upper frame seat and the lower frame seat can move freely back and forth relative to each other.

[0011] Preferably, the middle of the front wall of the limiting block protrudes forward, so that the upper part of the front wall of the limiting block matches and fits against the end-positioned limiting surface. By protruding the middle of the front wall of the limiting block to match and fit against the end-positioned limiting surface, the limiting effect is improved by increasing the contact area.

[0012] Preferably, the upper frame includes a mounting platform at the bottom of the front wall and a limiting member fixed to the mounting platform. The limiting member is fitted and fixed to the mounting platform, forming the limiting groove. The mounting platform is located at the bottom of the front wall of the upper frame, and the limiting block is located at the bottom of the rear wall of the lower frame. This ensures that the limiting block and the limiting groove are on the same horizontal plane, and also ensures that the lower frame can be limited in the front and rear directions by the limiting component after being exposed above the upper frame. The limiting member is fixed to the mounting platform and forms the limiting groove, which facilitates processing and maintenance.

[0013] Preferably, the limiting member includes a vertical portion forming the end limiting surface and a horizontal portion forming the top limiting surface, with the mounting platform located below the horizontal portion forming the bottom supporting surface. The included angle between the horizontal and vertical portions of the limiting member is an obtuse angle, ensuring both that the top limiting surface is horizontally positioned and that the end limiting surface is inclined.

[0014] Preferably, the bottom surface of the vertical part is flat and fits tightly against the mounting platform to limit the deflection of the limiting member. The tight fit between the bottom surface of the vertical part and the mounting platform limits the rotation of the limiting member, ensuring that the top limiting surface formed by the horizontal part always remains horizontal.

[0015] Preferably, the upper frame includes a frame for supporting the seat cushion and a support leg disposed below the front edge of the frame, with the mounting platform disposed on the inner side of the bottom of the support leg. The support leg supports the frame, leaving space below the frame to accommodate the lower frame, facilitating the back-and-forth movement of the lower frame. The mounting platform, disposed inside the support leg, conceals the limiting component and ensures that the limiting groove can be aligned back-and-forth with the corresponding limiting block, facilitating insertion and limiting.

[0016] Preferably, the support leg has a mounting hole in the area above the mounting platform, and the limiting member has a through hole. The fastener passes through the through hole and is screwed and locked to the mounting hole. The limiting member is fixed to the support leg and surrounds the mounting platform to form a limiting groove. This not only facilitates processing, but also uses the structural strength of the support leg to ensure that the contour of the limiting groove remains constant.

[0017] Preferably, the limiting block is fixed to the rear edge of the bottom of the side wall of the lower frame seat by fasteners and is set at the same height as the limiting groove. The front-to-back projection of the limiting block falls into the limiting groove. The limiting block moves with the lower frame seat to the second working position and is forward-engaged in the limiting groove. The limiting block corresponds to the opening of the limiting groove, ensuring that the limiting block can be smoothly inserted into the limiting groove after moving forward with the lower frame seat.

[0018] Preferably, casters are installed under the support legs, allowing the upper frame to move back and forth relative to the fixed seat. The limiting block inserts into the limiting groove and pulls the upper frame forward. The casters not only support the upper frame but also guide its back and forth movement, enabling the sofa bed to switch between different modes.

[0019] The beneficial effects of this utility model are as follows: The limiting component includes a limiting block and a limiting groove that opens to the rear. The limiting block is inserted horizontally into the limiting groove. The front wall of the limiting block abuts against the front wall of the limiting groove, which plays a role in limiting the front and rear movement of the upper frame seat and the lower frame seat. The top wall of the limiting block abuts against the top wall of the limiting groove, which plays a role in preventing the lower frame seat from jumping. This ensures that the limiting component is always reliably connected, improves the reliability of use, and ensures that the movable seat can be freely switched within a preset range. Attached Figure Description

[0020] Figure 1 This is a cross-sectional view of the sofa bed.

[0021] Figure 2 This is a cross-sectional view of the assembly structure of the limiting component;

[0022] Figure 3 This is a schematic diagram of the assembly structure of the sofa bed;

[0023] In the diagram: 1. Fixed seat, 2. Upper frame seat, 3. Lower frame seat, 4. Limiting block, 5. Limiting groove, 6. End limiting surface, 7. Top limiting surface, 8. Bottom supporting surface, 9. Mounting platform, 10. Limiting component, 11. Support leg, 12. Frame, 13. Roller, 14. Mounting hole. Detailed Implementation

[0024] The essential features of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0025] like Figure 1 and 2The sofa bed shown includes a fixed seat 1 and a movable seat. The movable seat includes an upper frame seat 2 and a lower frame seat 3 disposed within the upper frame seat 2. The lower frame seat 3 can reciprocate between a first working position hidden within the upper frame seat 2 and a second working position exposed in front of the upper frame seat 2. When the lower frame seat 3 moves to the second working position, it is locked and limited by a limiting component. The limiting component includes a limiting block 4 disposed at the rear of the lower frame seat 3 and a limiting groove 5 disposed at the front of the upper frame seat 2 and exposed rearward. The limiting block 4 is locked and positioned by the limiting groove 5 to limit the lower frame seat 3 from moving too far forward. The limiting component includes a limiting block 4 and a limiting groove 5 that opens to the rear. The limiting block 4 is inserted horizontally into the limiting groove 5. The front wall of the limiting block 4 abuts against the front wall of the limiting groove 5, which plays a role in limiting the front and rear movement and ensures that the upper frame seat 2 and the lower frame seat 3 move in the front and rear directions. The top wall of the limiting block 4 abuts against the top wall of the limiting groove 5, which plays a role in preventing the lower frame seat 3 from jumping. This ensures that the limiting component is always reliably connected, improves the reliability of use, and ensures that the movable seat can be freely switched within a preset range.

[0026] In actual operation, the limiting groove 5 includes an end limiting surface 6 that restricts the horizontal excessive forward movement of the limiting block 4, and a top limiting surface 7 and a bottom supporting surface 8 that restrict the vertical disengagement of the limiting block 4, so that the limiting block 4 is locked and limited by the cooperation of the end limiting surface 6, the top limiting surface 7, and the bottom supporting surface 8. The limiting groove 5 has a rearward opening for the limiting block 4 to enter and exit, and the limiting block 4 moves forward with the lower frame 3 and is inserted into the limiting groove 5. By using the end-position limiting surface 6 to abut against the front wall of the limiting block 4, the front-back position between the upper frame seat 2 and the lower frame seat 3 is fixed, which not only prevents the lower frame seat 3 from moving too far forward, but also drives the upper frame seat 2 to move forward when it is not fixedly connected to the fixed seat 1. By using the top-position limiting surface 7 and the supporting limiting surface to abut against the top and bottom surfaces of the limiting block 4 respectively, the lower frame seat 3 is vertically limited, and the supporting limiting surface supports the limiting block 4, ensuring that the lower frame seat 3 moves forward and backward in a horizontal posture. This effectively prevents the lower frame seat 3 from moving too far forward due to the limiting block 4 disengaging from the limiting groove 5, and ensures that the sofa bed can accurately switch between different modes.

[0027] In actual operation, the end-positioned limiting surface 6 is inclined, with its top edge tilting backward. The end-positioned limiting surface 6 and the front wall of the limiting block 4 have the same contour. The middle part of the front wall of the limiting block 4 protrudes forward so that the upper part of the front wall of the limiting block 4 matches and fits with the end-positioned limiting surface 6. This not only improves the limiting reliability by increasing the contact area between the limiting block 4 and the end-positioned limiting surface 6, but also guides the limiting block 4 to slide into the limiting groove 5 by using the inclined front wall of the limiting block 4 to abut against the groove opening of the limiting groove 5.

[0028] In actual operation, the top limiting surface 7 and the bottom supporting surface 8 are horizontal planes. The distance between the top limiting surface 7 and the bottom supporting surface 8 is greater than the height of the limiting block 4. The top and bottom surfaces of the limiting block 4 are both horizontal planes, which not only ensures that the limiting block 4 can move smoothly in the limiting groove 5, but also improves the vertical limiting effect by increasing the contact area.

[0029] In actual operation, the fixed seat 1 includes a rear-mounted backrest and armrests on both sides of the backrest. The backrest has a movable cushion. The upper frame seat 2 has a seat cushion on top, and the lower frame seat 3 has a height-adjustable reclining cushion on top. The lower frame seat 3 can move back and forth relative to the upper frame seat 2, thus cooperating with the fixed seat 1 to allow the sofa bed to switch between different modes. Specifically, the upper frame seat 2 and the lower frame seat 3 can switch between corresponding first and second use positions, and the sofa bed can switch between sofa mode, recliner mode, and bed mode.

[0030] When the sofa bed is in sofa mode, the backrest is in an upright position. The upper frame seat 2 and the lower frame seat 3 are both located in the first working position near the backrest. The lower frame seat 3 is hidden inside the upper frame seat 2. The upper frame seat 2 is set close to the backrest for easy sitting and leaning. At this time, the limiting block 4 and the limiting groove 5 are disengaged from each other.

[0031] When the sofa bed is in recliner mode, the backrest is in an upright position, the upper frame seat 2 is located in the first working position close to the backrest, and the lower frame seat 3 is located in the second working position away from the backrest. The lower frame seat 3 moves forward and is exposed outside the upper frame seat 2. At this time, the limiting block 4 moves forward synchronously with the lower frame seat 3 and is inserted into the limiting groove 5, so that the front-to-back position between the lower frame seat 3 and the upper frame seat 2 is fixed, and the upper frame seat 2 is set close to the backrest. The reclining cushion is raised and flush with the seat cushion, and the upper frame seat 2 is close to the backrest, making it convenient for the user to lean back in a reclining position.

[0032] When the sofa bed is in bed mode, the lower frame 3 moves forward and protrudes beyond the upper frame 2. The limiting block 4, which moves forward synchronously with the lower frame 3, inserts into the limiting groove 5 and pulls the upper frame 2 away from the backrest (e.g., ...). Figure 3 As shown), the upper frame seat 2 and the lower frame seat 3 are both located in the second use position away from the backrest, providing space for the backrest to switch to a horizontal position. The reclining cushion is raised and connected to the seat cushion and backrest cushion, making it convenient for the user to lie down.

[0033] In actual operation, the upper frame base 2 includes a mounting platform 9 located at the bottom of the front wall and a limiting member 10 fixed to the mounting platform 9. The limiting member 10 is fitted and fixed to the mounting platform 9 and forms the limiting groove 5. The limiting member 10 is fixed to the inside of the support leg by fasteners and forms the limiting groove 5 with the mounting platform 9. This facilitates disassembly and maintenance, limits the lower frame base 3, and pulls the upper frame base 2 forward.

[0034] In actual operation, the upper frame 2 includes a frame 12 for supporting the seat cushion and a support leg 11 located below the front edge of the frame 12. The mounting platform 9 is located inside the bottom of the support leg 11. The support leg 11 supports the frame 12, providing a hidden space for the lower frame 3, ensuring that the lower frame 3 can be hidden in the first working position. Rollers 13 are installed below the support leg 11, allowing the upper frame 2 to move back and forth relative to the fixed seat 1. The limiting block 4 is inserted into the limiting groove 5 and pulls the upper frame 2 forward.

[0035] In actual operation, the limiting member 10 includes a vertical portion forming the end limiting surface 6 and a horizontal portion forming the top limiting surface 7. The mounting platform 9 is located below the horizontal portion and forms the bottom supporting surface 8. The limiting member 10 is fixed to the inside of the support leg 11, so that the flat bottom surface of the vertical portion fits tightly against the mounting platform 9 to limit the deflection of the limiting member 10 and maintain the groove contour of the limiting groove 5.

[0036] In actual operation, the support leg 11 has a mounting hole 14 in the area above the mounting platform 9. The limiting member 10 has a through hole, through which a fastener passes and is screwed and locked to the mounting hole 14. Specifically, the limiting block 4 is fixed to the rear edge of the bottom side wall of the lower frame 3 by a fastener and is set at the same height as the limiting groove 5. The front-to-back projection of the limiting block 4 falls into the limiting groove 5. The limiting block 4 moves with the lower frame 3 to the second working position and is forward-locked in the limiting groove 5. The limiting groove 5 and the limiting block 4 are aligned front-to-back and set at the same height to ensure that the limiting block 4 can be smoothly inserted into the limiting groove 5 and achieve positioning and linkage when it moves forward with the lower frame 3.

Claims

1. A sofa bed with a limiting groove, comprising a fixed seat (1) and a movable seat, the movable seat comprising an upper frame seat (2) and a lower frame seat (3) disposed within the upper frame seat (2), the lower frame seat (3) being reciprocally movable between a first working position hidden within the upper frame seat (2) and a second working position exposed in front of the upper frame seat (2), characterized in that, The lower frame seat (3) moves to the second working position and is locked and limited by the limiting component with the upper frame seat (2). The limiting component includes a limiting block (4) located at the rear of the lower frame seat (3) and a limiting groove (5) located at the front of the upper frame seat (2) and exposed to the rear. The limiting block (4) is locked and positioned by the limiting groove (5) to limit the lower frame seat (3) from moving too far forward.

2. A sofa bed with a limiting groove according to claim 1, characterized in that, The limiting groove (5) includes an end limiting surface (6) that restricts the horizontal excessive forward movement of the limiting block (4), a top limiting surface (7) and a bottom supporting surface (8) that restrict the vertical disengagement of the limiting block (4), so that the limiting block (4) is locked and limited by the cooperation of the end limiting surface (6), the top limiting surface (7) and the bottom supporting surface (8).

3. A sofa bed with a limiting groove according to claim 2, characterized in that, The end limiting surface (6) is inclined, and the top edge of the end limiting surface (6) is inclined backward; or, the top limiting surface (7) and the bottom supporting surface (8) are horizontal, and the distance between the top limiting surface (7) and the bottom supporting surface (8) is greater than the height of the limiting block (4).

4. A sofa bed with a limiting groove according to claim 2, characterized in that, The top and bottom surfaces of the limiting block (4) are both horizontal; or, the middle of the front wall of the limiting block (4) protrudes forward so that the upper part of the front wall of the limiting block (4) matches and fits the end-positioned limiting surface (6).

5. A sofa bed with a limiting groove according to any one of claims 2-4, characterized in that, The upper frame base (2) includes a mounting platform (9) located at the bottom of the front wall and a limiting member (10) fixedly connected to the mounting platform (9). The limiting member (10) is attached to the mounting platform (9) and forms the limiting groove (5).

6. A sofa bed with a limiting groove according to claim 5, characterized in that, The limiting member (10) includes a vertical portion forming the end limiting surface (6) and a horizontal portion forming the top limiting surface (7), and the mounting platform (9) is located in the area below the horizontal portion to form the bottom supporting surface (8).

7. A sofa bed with a limiting groove according to claim 6, characterized in that, The bottom surface of the vertical part is flat and fits tightly against the mounting platform (9) to limit the deflection of the limiting member (10).

8. A sofa bed with a limiting groove according to claim 5, characterized in that, The upper frame (2) includes a frame (12) for supporting the seat cushion and a support leg (11) disposed below the front edge of the frame (12), and the mounting platform (9) is disposed on the inner side of the bottom of the support leg.

9. A sofa bed with a limiting groove according to claim 8, characterized in that, The support leg (11) has a mounting hole (14) in the area above the mounting platform (9). The limiting member (10) has a through hole. The fastener passes through the through hole and is screwed and locked to the mounting hole (14). Alternatively, the limiting block (4) is fixed to the rear edge of the bottom side wall of the lower frame (3) by a fastener and is set at the same height as the limiting groove (5). The front and rear projection of the limiting block (4) falls into the limiting groove (5). The limiting block (4) moves with the lower frame (3) to the second working position and is locked in the limiting groove (5).

10. A sofa bed with a limiting groove according to claim 8, characterized in that, The support leg (11) is equipped with a roller (13) below it. The upper frame seat (2) can move back and forth relative to the fixed seat (1). The limiting block (4) is inserted into the limiting groove (5) and pulls the upper frame seat (2) forward.

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