Linkage device and novel folding sofa bed comprising same

Abstract

The utility model relates to a linkage device and a novel folding sofa bed comprising the linkage device. The novel folding sofa bed comprises the linkage device, a front frame, a middle frame, an outer frame, a front soft bag, an inner soft bag, an outer soft bag, a handrail soft bag and a covering soft bag, the linkage device has the advantages that the linkage device is simple and novel in structure and stable in structure during operation, the sliding rail wheels slide back and forth in the sliding rail pieces with certain operation tracks, operation of the linkage device is easily completed, and operation is easy; and (2) when the sofa bed is retracted to the form of the sofa, the soft bag in front of the tail of the sofa bed is lifted upwards to drive the sliding rail piece and the spring of the middle frame to be retracted, and folding with the soft bag outside the bed head of the sofa and the soft bag inside the bed is completed. The outer soft bag and the inner soft bag can be linked to be used as a sofa backrest when being folded, and the front soft bag can be folded and turned upwards to be used as a sofa cushion, so that the product is multifunctional; (3) the internal frame and the soft package part of the sofa are of an integrated structure, so that the sofa is simplified, the sitting depth is moderate, and the sitting and sleeping feelings are comfortable.

Description

Technical Field

[0001] This utility model relates to the field of sofa furniture manufacturing technology, specifically to a linkage device and a novel folding sofa bed including the linkage device. Background Technology

[0002] Currently, sofa beds are a type of furniture that can function as both a sofa for sitting and a bed, allowing people to lie down and rest. This versatility makes them ideal for modern homes with minimalist designs. They are often used in small apartments to accommodate occasional guests, making a sofa bed essential. In small apartments, sofa beds can be placed in the living room or study, serving as seating; when guests arrive, they can be unfolded into a bed. Sofa beds come in various designs, including folding, pull-out, and flip-up types, saving space and offering multiple uses. The market offers a wide variety of sofa beds, catering to both consumer tastes and cost-saving needs. Currently, some sofa beds on the market have folding mechanisms that cannot effectively create upholstered backrests, requiring detachable upholstery. Opening the sofa bed requires removing the upholstery, making the operation cumbersome. Furthermore, the seat depth is often too deep, and the backrest too upright, which is not ergonomic. Therefore, the design and manufacture of linkage mechanisms for sofa beds are crucial.

[0003] The invention disclosed in application number CN202411258234.6 is achieved through the following technical solution: A horizontally folding sofa bed is disclosed, comprising a fixed base frame, a first linkage assembly, a left frame, a connector, a right frame, and a support member. A limiting member is provided on the fixed base frame. One end of the first linkage assembly is pivotally connected to the fixed base frame. The first linkage assembly has an abutment surface corresponding to the limiting member. The left frame is pivotally connected to the other end of the first linkage assembly. When the left frame is unfolded on the fixed base frame, the abutment surface of the first linkage assembly abuts against the limiting member to prevent rotation of the first linkage assembly. One end of the connector is pivotally connected to one side of the left frame. One side of the right frame is pivotally connected to the other end of the connector. The right frame can be stored above the left frame via the connector or unfolded to one side of the left frame. The support member is pivotally connected to the lower part of the right frame. This application allows the bed frame to be unfolded horizontally for use, allowing the user to choose to lie horizontally while sleeping, maximizing the use of floor space. However, this invention can only be folded in two ways at present, and the headrest part of the sand bed cannot be laid flat. Also, the sofa cushion is laid directly on the folded iron frame, and it cannot be integrated with the iron frame, making the operation more cumbersome.

[0004] The invention disclosed in application number CN202411247188.X is achieved through the following technical solution: A three-section sofa bed is disclosed, comprising a rear frame, a middle frame, and a front frame. The rear frame has first slide rails on opposite sides. At both ends of the first slide rails are first and second ramps connecting the two ends of the first slide rails. The middle frame has second slide rails on opposite sides. The extension direction of the second slide rails is the same as that of the first slide rails. At both ends of the second slide rails are third and fourth ramps connecting the two ends of the second slide rails. A first guide pulley is provided on the side of the middle frame closest to the third ramp. The first guide pulley is located on the first ramp. The front frame is mounted on the middle frame. A second guide pulley is provided on the side of the front frame closest to the third ramp. The second guide pulley is located on the third ramp. Although this invention allows for the unfolding or folding of a three-section sofa bed, making it easy to operate, if the sofa bed is not integrated with the rear frame when converted into a sofa, the backrest needs to be added separately, making the structure relatively complex.

[0005] The invention disclosed in application number CN202411186185.X is achieved through the following technical solution: a linkage mechanism applied to a three-section sofa bed, comprising a first linkage assembly, a second linkage assembly, a third linkage assembly, and a locking assembly. The first linkage assembly is pivotally connected on one side to the front sofa cushion and on the other side to the fixed base of the sofa frame. The first linkage assembly has a locking hole. The second linkage assembly is pivotally connected at one end to the middle sofa cushion and at the other end to the middle section of the first linkage assembly. The third linkage assembly is pivotally connected on one side to the rear sofa cushion and on the other side to the pivot point between the first linkage assembly and the fixed base. The locking assembly is located on the side of the first linkage assembly near the front sofa cushion. The locking assembly includes a locking rod corresponding to the locking hole. The front sofa cushion unfolds to one side of the middle sofa cushion via the linkage rotation of the first linkage assembly, and the locking assembly prevents the first linkage assembly from rotating again by inserting the locking rod into the locking hole. Although this invention can improve product safety, its linkage mechanism is not yet the most streamlined, and the sofa backrest needs to be added separately, resulting in higher manufacturing costs. Further optimization is possible. Utility Model Content

[0006] To address the above problems, this utility model provides a linkage device and a novel folding sofa bed including the linkage device. The linkage device has a novel and simplified structural design. The linkage device is hidden inside both sides of the sofa bed. The structure is stable during folding operation. Furthermore, the outer frame, middle frame, and front frame of the sofa bed can be directly upholstered. The sofa bed is easy to operate and can effectively solve the problems in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: A linkage device, comprising a front frame fixing member, a first linkage member, a second linkage member, a third linkage member, a fourth linkage member, a slide rail member, an outer frame connecting member, and a wooden frame fixing member. The middle end of the front frame fixing member is fixed to the upper part of the first linkage member, and the rear end is fixed to the upper part of the second linkage member. The front frame fixing member is L-shaped. The first linkage member is F-shaped, with its middle part fixed to a slide rail locking member on the slide rail member, and its rear end fixed to the lower part of the second linkage member. A limit locking member is provided at the front end of the first linkage member for locking the front frame fixing member after extension. The second linkage member is arc-shaped, with its middle part fixed to the slide rail locking member, its lower middle end fixed to the front end of the third linkage member, and its bottom end fixed to the upper middle part of the fourth linkage member. The rear end of the third linkage member is fixed to the outer frame connecting member, and the rear end of the fourth linkage member is fixed to the wooden frame fixing member. The wooden frame fixing component has a limiting locking component, which is used to lock and fix the outer frame connecting component. A spring is fixed to the lower middle end of the second linkage component and the lower middle end of the fourth linkage component. The slide rail component is a grooved slide rail; the slide rail wheel inside the slide rail component rolls back and forth, driving the middle frame to move. The front frame fixing component, the first linkage component, the second linkage component, the third linkage component, the fourth linkage component, the slide rail component, the outer frame connecting component, and the wooden frame fixing component constitute a linkage device.

[0008] As a preferred embodiment of the above technical solution, a linkage device has a front frame, a middle frame, and an outer frame fixed at its front, middle, and rear ends, respectively. The front frame consists of four side panels with several horizontal and vertical fixing members in the middle, fixed inside the four side panels. The front end of the front frame is fixed to the front wooden baffle, and the middle and rear ends are fixed to the front frame fixing members. The front and side ends of the middle frame are fixed to the inside of the slide rails by slide rail locking members, and the rear end is fixed to the front end of the outer frame by bolts. The rear ends of the outer frame are fixed to wooden frame fixing members, which are fixed to the side wooden baffles. The side wooden baffles and the rear wooden baffle are fixed to each other, and a fixing wooden frame is fixed to the front end of the side wooden baffles for fixing the two side wooden baffles. Foot nails are fixed to the left and right bottom of the front wooden baffle, and the foot nails are locked by L-shaped locking members.

[0009] As a preferred embodiment of the above technical solution, a synchronous support rod is fixed at the bottom of the first linkage component, which fixes the linkage devices on both sides and increases the stability of the sofa bed.

[0010] This utility model independently develops a linkage device, which is made of iron and consists of a front frame fixing component, a first linkage component, a second linkage component, a third linkage component, a fourth linkage component, a slide rail component, an outer frame connector, and a wooden frame fixing component. The components of the linkage device have novel designs: the front frame fixing component is shaped like a bent L, the first linkage component is F-shaped, the second linkage component is arc-shaped, and the third linkage component is straight. When the front frame fixing component is lifted and folded backward, the first and second linkage components, fixed at their rear ends, are lifted upward. When the first and second linkage components are raised to their highest point, the slide rail component is parallel to the front frame fixing component and the third linkage component. The fourth linkage component, as the main fixing linkage component, plays a role in fixing and linking the entire linkage device. The rear ends of the first, second, and third linkage components are fixed to the front end of the fourth linkage component with bolts. The rear end of the fourth linkage component is fixed with the outer frame connector and the wooden frame fixing component. When the front frame fixing component is extended outward to a 180-degree angle, the limiting locking components on the first linkage component and the wooden frame fixing component play a crucial role, restricting the continued movement of the front frame fixing component and the outer frame connecting component, thus securing the linkage device after it has been unfolded to a certain position. Through the mutual fixing and support between the various linkage components, the linkage device achieves its folding and unfolding functions. The new linkage device has a simple and novel structure, strong stability, and convenient operation, enabling the sofa to be folded into a sofa bed. The sliding rail auxiliary design is a prominent innovation; during operation, the movement of the sliding rail wheels easily completes the transformation from a sofa bed to a sofa, making it easy, convenient, and suitable for all types of people.

[0011] This utility model also provides a novel folding sofa bed, including the aforementioned linkage device, a front soft pad, an inner soft pad, an outer soft pad, an armrest soft pad, and a covering soft pad. The front soft pad is fixed to the outside of the front frame and serves as the seat cushion of the sofa bed. The inner soft pad is fixed to the outside of the middle frame and serves as the inner soft pad for the backrest of the sofa bed. The outer soft pad is fixed to the outside of the outer frame and serves as the outer soft pad for the sofa bed. The armrest soft pad is fixed to the outside of the side wooden panels and serves as armrests when the sofa bed is folded into a sofa. The covering soft pad is fixed to the outside of the front wooden panels and serves as a cover for the front of the sofa bed.

[0012] As a preferred embodiment of the above technical solution, the lower part of the outer soft bag is sewn with a zipper to facilitate the installation and removal of the soft bag cover.

[0013] This utility model independently develops a foldable sofa bed, including the aforementioned linkage device, front upholstery, inner upholstery, outer upholstery, armrest upholstery, and cover upholstery. The front upholstery, inner upholstery, outer upholstery, armrest upholstery, and cover upholstery are made of leather fabric and sponge, sewn together and directly upholstered, achieving an integrated structure between the upholstery and the sofa's internal frame. The designed and manufactured sofa bed easily transforms from a sofa bed to a sofa. When the consumer pulls the bottom of the cover upholstery upwards, the linkage device and its sliding rails fold the outer and inner upholstery, allowing them to be used as a sofa backrest; the front upholstery at the foot of the sofa bed can be folded up and used as a sofa cushion. When the consumer pulls the cover upholstery forward, the sofa extends to the sofa bed form, and the foot of the sofa bed unfolds forward, aligning the front, inner, and outer upholstery in a parallel line, thus transforming it into a sofa bed. It is comfortable to sit on as a sofa and comfortable to sleep on as a sofa bed, conforming to ergonomics.

[0014] This utility model has the following beneficial effects:

[0015] 1. The new linkage device features a simple and novel structure, concealed within the sides of the sofa bed. It offers strong structural stability during folding and is easy to operate. A key innovation is the auxiliary design of the sliding rail components. During operation, the linkage device operates effortlessly by having the sliding wheels move back and forth along the designated tracks.

[0016] 2. The outer, middle, and front frames of the sofa bed can be directly upholstered. When the outer and inner upholstery are folded, they can be used together as a sofa backrest. The front upholstery at the foot of the sofa bed can be folded up and used as a sofa cushion. When the sofa bed is returned to its sofa position, the foot of the bed rises, and the springs and slides of the middle frame retract, folding the outer upholstery at the headboard and the inner upholstery in the middle of the bed. This achieves a multi-functional transformation from a sofa for sitting to a sofa bed for lying down.

[0017] 3. The sofa features an integrated internal frame and upholstery structure. Common sofas on the market have separate upholstery and frame, requiring the upholstery to be removed before the bed mechanism can be folded, which is cumbersome, results in a deeper seat, and a more upright backrest, which is not comfortable for the human body. The integrated internal frame and upholstery structure easily converts the sofa into a sofa bed, saving time and effort. It provides a comfortable sitting and sleeping position, conforming to ergonomic principles. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 These are front and back structural views of a linkage device according to this utility model;

[0020] Figure 2This is a structural diagram of a linkage device of this utility model after it is installed on a side wooden baffle.

[0021] Figure 3 This utility model relates to a linkage device installed on the internal structure of a sofa bed (right view).

[0022] Figure 4 This is a left view of a linkage device installed on the internal structure of a sofa bed according to this utility model;

[0023] Figure 5 This is a partially enlarged view of the spring component in a linkage device according to this utility model;

[0024] Figure 6 This is a partial enlarged view of the slide rail and slide rail wheel in a linkage device of this utility model;

[0025] Figure 7 This utility model discloses a linkage device and a novel folding sofa bed containing the linkage device, which is folded into a sofa internal structure diagram.

[0026] Figure 8 This is a diagram of a linkage device and the internal structure of a novel folding sofa including the linkage device after it is extended into a sofa bed.

[0027] Figure 9 This is a schematic diagram of the internal structure of a linkage device and a novel folding sofa bed including the linkage device.

[0028] Figure 10 This is a partial enlarged view of a linkage device and the foot nails of a novel folding sofa bed including the linkage device according to this utility model.

[0029] Figure 11 This is a partial enlarged view of a linkage device and a novel folding sofa bed bottom zipper including the linkage device according to this utility model;

[0030] Figure 12 This is a diagram showing the rear structure of a new type of folding sofa bed including a linkage device and the linkage device.

[0031] Figure 13 This is a diagram showing the rear structure of a new type of folding sofa bed including a linkage device and the linkage device.

[0032] Figure 14 This is a perspective view of a linkage device and a novel folding sofa bed including the linkage device.

[0033] In the diagram, 1-front frame fixing component, 2-first linkage component, 3-second linkage component, 4-third linkage component, 5-fourth linkage component, 6-slide rail component, 7-outer frame connector, 8-wooden frame fixing component, 9-limiting locking component, 10-spring, 11-front frame, 12-middle frame, 13-outer frame, 14-front wooden baffle, 15-side wooden baffle, 16-rear wooden baffle, 17-fixed wooden frame, 18-foot nail, 21-front soft padding, 22-inner soft padding, 23-outer soft padding, 24-armrest soft padding, 25-covering soft padding, 11-1-four-sided frame, 11-2-horizontal fixing component, 11-3-vertical fixing component, 13-1-bolt, 18-1-L-shaped locking component, 23-1-zipper, 201-synchronous support rod, 601-slide rail locking component, 602-slide rail wheel. Detailed Implementation

[0034] This specific embodiment is merely an explanation of the present invention and is not intended to limit it. Any modifications made by those skilled in the art after reading this specification, as long as they fall within the scope of the claims, will be protected by patent law.

[0035] like Figures 1-6As shown, a linkage device includes a front frame fixing member 1, a first linkage member 2, a second linkage member 3, a third linkage member 4, a fourth linkage member 5, a slide rail member 6, an outer frame connector 7, and a wooden frame fixing member 8. The middle end of the front frame fixing member 1 is fixed to the upper part of the first linkage member 2, and the rear end is fixed to the upper part of the second linkage member 2. The front frame fixing member 1 is L-shaped. The first linkage member 2 is F-shaped, with its middle part fixed to the slide rail locking member 601 on the slide rail member 6, and its rear end fixed to the lower part of the second linkage member 3. A limiting locking member 9 is provided at the front end of the first linkage member 2 to lock and fix the front frame fixing member 1 after it is extended. The second linkage member 3 is arc-shaped, with its middle part fixed to the slide rail locking member 601, its lower middle end fixed to the front end of the third linkage member 4, and its bottom end fixed to the upper middle part of the fourth linkage member 5. The rear end of the third linkage member 4 is fixed to the outer frame connector 7, and the rear end of the fourth linkage member 4 is fixed to the wooden frame fixing member 8. The wooden frame fixing component 8 has a limiting locking component 601, which is used to lock and fix the outer frame connecting component 7. A spring 10 is fixed to the lower middle end of the second linkage component 3 and the lower middle end of the fourth linkage component 5. The slide rail component 6 is a grooved slide rail; the slide rail wheel 602 inside the slide rail component 6 rolls back and forth, driving the middle frame 12 to move. A synchronous support rod 201 is fixed to the bottom of the first linkage component 2, fixing the left and right linkage devices and increasing the stability of the sofa bed. The front frame fixing component 1, the first linkage component 2, the second linkage component 3, the third linkage component 4, the fourth linkage component 5, the slide rail component 6, the outer frame connecting component 7, and the wooden frame fixing component 8 constitute a linkage device.

[0036] like Figures 7-9 As shown, a linkage device has a front frame 11, a middle frame 12, and an outer frame 13 fixed at its front, middle, and rear ends, respectively. The front frame 11 is fixed inside the four-sided frame 11-1 by several horizontal fixing members 11-2 and vertical fixing members 11-3 in the middle. The front end of the front frame 11 is fixed to the front wooden baffle 14, and the middle and rear ends are fixed to the front frame fixing member 1. The front and side ends of the middle frame 12 are fixed to the inside of the slide rail member 6 by slide rail locking members 601, and the rear end is fixed to the front end of the outer frame 13 by bolts 13-1. The rear ends of the outer frame 13 are fixed to the wooden frame fixing member 8, and the wooden frame fixing member 8 is fixed to the side wooden baffle 15. The side wooden baffle 15 and the rear wooden baffle 16 are fixed to each other, and a fixing wooden frame 17 is fixed to the front end of the side wooden baffle 15 for fixing the two side wooden baffles 15. The front wooden baffle 14 is fixed with foot nails 18 at its left and right bottom, and the foot nails 18 are locked by L-shaped locking pieces 18-1.

[0037] like Figures 11-14As shown, a novel folding sofa bed includes the aforementioned linkage device, a front upholstery 21, an inner upholstery 22, an outer upholstery 23, an armrest upholstery 24, and a covering upholstery 25. The front upholstery 21 is fixed to the outside of the front frame 11 and serves as the seat cushion of the sofa bed. The inner upholstery 22 is fixed to the outside of the middle frame 12 and serves as the inner upholstery of the sofa bed's backrest. The outer upholstery 23 is fixed to the outside of the outer frame 13 and serves as the outer upholstery of the sofa bed. The armrest upholstery 24 is fixed to the outside of the wooden partition 15 on side d and serves as an armrest when the sofa bed is folded into a sofa. The covering upholstery 25 is fixed to the outside of the front wooden partition 14 and serves as a cover for the front of the sofa bed. A zipper 23-1 is sewn onto the lower part of the outer upholstery 13.

Claims

1. A linkage characterized by: The utility model relates to a sofa bed linkage device, including front frame fixing piece (1), first linkage (2), second linkage (3), third linkage (4), fourth linkage (5), slide rail piece (6), outer frame connecting piece (7), wood frame fixing piece (8), the upper portion of first linkage (2) is fixed with the middle end of front frame fixing piece (1), and the upper portion is fixed with second linkage (3) rear end, front frame fixing piece (1) is bent L shape, first linkage (2) is F shape, and the slide rail locking piece (601) on the middle portion of first linkage (2) is fixed with slide rail piece (6), and the lower portion of second linkage (3) is fixed with rear end, and the upper front end of first linkage (2) is limited and is fixed with limiting piece (9), and the limiting piece (9) is used to spread the fixed location of front frame fixing piece (1), second linkage (3) is arc shape, and the middle portion of second linkage (3) is fixed with slide rail locking piece (601), and the front end of third linkage (4) is fixed with middle lower end, and the middle upper portion of fourth linkage (5) is fixed with bottom end, third linkage (4) rear end is fixed with outer frame connecting piece (7), and fourth linkage (5) rear end is fixed with wood frame fixing piece (8), the upper limiting piece (9) of wood frame fixing piece (8) is fixed with limiting piece (9), and the limiting piece (9) is used to the fixed location of outer frame connecting piece (7), the middle lower end of second linkage (3) is fixed with the middle bottom end of fourth linkage (5) spring (10), and slide rail piece (6) is the slide rail with recess, and through the front and rear rolling of slide rail wheel (602) in slide rail piece (6), middle frame (12) can be moved, the inside bottom of first linkage (2) is fixed with a synchronous support rod (201), and the linkage device of left and right sides is fixed, and the stability of sofa bed is increased, front frame fixing piece (1), first linkage (2), second linkage (3), third linkage (4), fourth linkage (5), slide rail piece (6), outer frame connecting piece (7), wood frame fixing piece (8) constitute a linkage device.

2. The linkage of claim 1 wherein: The front end, the middle end and the rear end of the linkage device are respectively fixed with a front frame (11), a middle frame (12) and an outer frame (13); the front frame (11) is internally fixed with a plurality of horizontal fixing members (11-2) and vertical fixing members (11-3) in the four-side frame (11-1); the front end of the front frame (11) is fixed with a front wooden baffle (14), and the middle and rear ends are fixed with a front frame fixing member (1); the front and side ends of the middle frame (12) are fixed in the inner side of the slide rail member (6) through slide rail locking members (601), and the rear end is fixed with the front end of the outer frame (13) through bolts (13-1); the rear ends of the outer frame (13) are fixed on wooden frame fixing members (8), and the wooden frame fixing members (8) are fixed on side wooden baffles (15); the side wooden baffles (15) and rear wooden baffles (16) are fixed with each other, the front end of the side wooden baffle (15) is fixed with a fixed wooden frame (17) for fixing the side wooden baffles (15); the left and right bottoms of the front wooden baffle (14) are fixed with foot nails (18), and the foot nails (18) are locked through L-shaped locking members (18-1).

3. A new type of folding sofa bed, characterized by: The linkage device comprises a front soft bag (21), an inner soft bag (22), an outer soft bag (23), an armrest soft bag (24) and a covering soft bag (25); the front soft bag (21) is fixed outside the front frame (11) and used as a cushion of the sofa bed; the inner soft bag (22) is fixed outside the middle frame (12) and used as an inner soft bag of the backrest of the sofa bed; the outer soft bag (23) is fixed outside the outer frame (13) and used as an outer soft bag of the sofa bed; the armrest soft bag (24) is fixed outside the side wooden baffle (15) and used as an armrest when the sofa bed is folded into a sofa; the covering soft bag (25) is fixed outside the front wooden baffle (14) and used for covering the front part of the sofa bed; and a zipper (23-1) is sewn on the lower part of the outer soft bag (23).

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