Sturdy sofa bed frame

Abstract

The utility model belongs to sofa bed technical field, concretely relates to stable sofa bed frame, including fixed frame, the rear end of fixed frame is hinged with backrest support, front backrest support and translation frame in proper order to the front, be provided with translation guide rail on fixed frame, translation frame is butt joint with translation guide rail through pulley assembly, and pulley assembly includes pulley and support plate of fixed pulley pivot that are symmetrically set on the upper and lower sides of translation guide rail, and support plate is fixedly connected with translation frame. The utility model provides the sofa bed telescopic bed frame of stable support structure, high durability, can promote product use experience.

Description

Technical Field

[0001] This utility model relates to the field of sofa bed technology, and more specifically, to a stable sofa bed frame. Background Technology

[0002] With the deepening of urbanization, people's housing pressure is increasing day by day. People often need to find a way to properly arrange their living environment in a limited space. And the bed is one of the essential household items in people's home life. However, beds usually take up a large area and tend to occupy too much space in the living room.

[0003] Therefore, in small apartments, a sofa bed is essential to accommodate occasional guests. Typically, a sofa bed can be placed in the living room or study, serving as seating; when guests arrive, it can be unfolded and made into a bed. In typical three-bedroom, two-living-room apartments, a sofa bed can also help the homeowner accommodate occasional visits from multiple guests, in addition to the guest bedroom. Choosing a suitable sofa bed requires some consideration. It must fulfill both sitting and reclining functions, be sturdy, durable, and aesthetically pleasing, and its materials and craftsmanship should be guaranteed.

[0004] A typical telescopic structure for a sofa bed is shown in patent document CN202322757948.9, entitled "An Electric Telescopic Device for a Sofa Bed and a Sofa Bed". It includes a base frame, a movable frame, and a transmission assembly. The base frame has slide rails at both ends. The transmission assembly includes a motor and push rods. The motor is fixed to the movable frame. One end of the push rod is connected to the motor, and the other end is connected to the movable frame. The movable frame has two connecting rods, each with a sliding block below it. The sliding blocks cooperate with the slide rails. The base frame has two limiting members, corresponding to the two sides of the connecting rods. The sofa bed includes the electric telescopic device described above, as well as a bed frame body, with the base frame fixed to the bed frame body. By providing limiting members, the position of the movable frame on both sides is limited, effectively preventing displacement of the movable frame during daily use or when the frame is subjected to uneven stress.

[0005] However, when people sit on the sofa bed, the structure relies mainly on the transmission mechanism to provide vertical support. Even with limiting components on both sides, these components cannot provide load-bearing capacity. The bed frame still deforms when people sit down and are subjected to force, resulting in creaking noises, tilting of the bed frame, and even damage to the transmission mechanism and slide rails. Utility Model Content

[0006] To address the issues of insufficient support in the telescopic structure of current sofa beds, which easily deforms under stress during use, causing creaking noises from collisions between components and overall tilting of the bed frame, we provide a stable sofa bed frame.

[0007] A stable sofa bed frame includes a fixed frame, a backrest support, a front backrest support, and a sliding frame that are hinged forward at the rear end of the fixed frame. A sliding guide rail is provided on the fixed frame. The sliding frame is connected to the sliding guide rail through a pulley assembly. The pulley assembly includes pulleys symmetrically arranged on the upper and lower sides of the sliding guide rail and a support plate that fixes the pulley shaft. The support plate is fixedly connected to the sliding frame.

[0008] Furthermore, a recessed frame is provided in the middle of the front back support, and the thickness of the recessed frame is equal to the distance between the bottom of the translation frame and the fixed frame.

[0009] Furthermore, a soft limiting stop is provided at the rear end of the translation guide rail corresponding to the pulley.

[0010] Furthermore, the pulley assembly is installed at the rear end of the translation frame, and a support roller is connected to the lower front end of the translation frame. The bottom of the support roller is on the same horizontal plane as the bottom of the fixed frame.

[0011] Furthermore, both ends of the fixed frame are provided with translation guide rails. The width of the translation frame is less than the distance between the two translation guide rails. The left and right ends of the translation frame are respectively connected to the inner side of the translation guide rails through pulley assemblies.

[0012] Furthermore, a linear driver is driven to be arranged in front and behind the middle of the translation frame, and the linear driver is fixedly installed on the fixed frame.

[0013] Furthermore, the side of the fixed frame is provided with a control button that is electrically connected to the linear actuator.

[0014] The advantages of this utility model are: 1. The retractable translation frame uses symmetrical pulley assemblies and other structures for vertical support, resulting in high durability and strong stability.

[0015] 2. The telescopic linkage mechanism is simple and can quickly switch between sofa and bed modes, making it easy to use. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A structural diagram of a sturdy sofa bed frame; Figure 2A schematic diagram of the structure of a stable sofa bed frame after the telescopic cushion frame has been extended; Figure 3 A top view showing the sofa and bed positions of a sturdy sofa bed frame; Figure 4 This is a structural detail diagram of the pulley assembly.

[0018] Attached image labels: 1. Fixed frame; 101. Translation guide rail; 2. Rear back support bracket; 3. Front back support bracket; 301. Recessed frame body; 4. Translation frame; 5. Pulley assembly; 501. Pulley; 502. Pulley shaft; 503. Support plate; 6. Limit stop plate; 7. Support roller; 8. Linear actuator; 9. Control button. Detailed Implementation

[0019] To address the issues of insufficient support in the telescopic structure of current sofa beds, which easily deforms under stress during use, causing creaking noises from collisions between components and overall tilting of the bed frame, we provide a stable sofa bed frame.

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0021] It should be noted that the terms such as "inner", "middle" and "one" used in this specification are only for clarity of description and are not intended to limit the scope of implementation of this utility model. Any changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered as part of the scope of implementation of this utility model, as stated above.

[0022] In the description of this utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," and "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "connected," and "joined" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood through specific circumstances.

[0023] like Figures 1 to 4 As shown, this embodiment provides a stable sofa bed frame, including a fixed frame 1, a backrest support 2, a front backrest support 3, and a sliding frame 4 that are sequentially hinged forward at the rear end of the fixed frame 1. A sliding guide rail 101 is provided on the fixed frame 1, and the sliding frame 4 is connected to the sliding guide rail 101 through a pulley assembly 5. The pulley assembly 5 includes pulleys 501 symmetrically arranged on the upper and lower sides of the sliding guide rail 101 and a support plate 503 that fixes the pulley shaft 502. The support plate 503 is fixedly connected to the sliding frame 4.

[0024] Because the translation frame 4 is supported and guided by symmetrical pulleys 501, its stability is strong. This prevents the translation frame 4 from deforming under pressure and colliding with the fixed frame 1 or other structures, thus avoiding noise and tilting. Furthermore, the translation guide rail 101 can be made directly from metal square tubing, which is stronger and less prone to deformation under stress compared to traditional pulley track structures.

[0025] A recessed frame 301 is provided in the middle of the front back support 3. The thickness of the recessed frame 301 is equal to the distance between the bottom of the translation frame 4 and the fixed frame 1. The recessed frame 301 contacts the ground when the front back support 3 is unfolded, providing stable support.

[0026] The rear end of the translation guide rail 101 is provided with a soft limiting baffle 6 corresponding to the pulley 501. The limiting baffle 6 can prevent the front end of the translation frame 4 from being hit and moving inward excessively, causing structural damage and improving the reliability of the equipment.

[0027] The pulley assembly 5 is installed at the rear end of the translation frame 4, and a support roller 7 is connected to the lower front end of the translation frame 4. The bottom of the support roller 7 is on the same horizontal plane as the bottom of the fixed frame 1. The support roller 7 and the pulley assembly 5 work together to improve the load-bearing capacity of the translation frame 4 and prevent the front end of the translation frame 4 from tilting downwards under force, thereby reducing the operating load of the linear actuator 8.

[0028] The fixed frame 1 has translational guide rails 101 at both its left and right ends. The width of the translational frame 4 is smaller than the distance between the two translational guide rails 101. The left and right ends of the translational frame 4 are respectively connected to the inner side of the translational guide rails 101 via pulley assemblies 5. The inner translational frame 4 is clamped in the fixed frame 1, further improving the structural stability.

[0029] The translation frame 4 is driven by a linear actuator 8 arranged at the front and rear, which is fixedly mounted on the fixed frame 1. The linear actuator 8 can use a power device such as a linear push rod or a linear slide to enable the translation frame 4 to extend and retract automatically.

[0030] The fixed frame 1 has a control button 9 electrically connected to the linear actuator 8 on its side. In this embodiment, the control button 9 includes an extend and retract button, which allows the user to control the bed frame to extend and retract between sofa and bed modes.

[0031] The above description is a further detailed explanation of the present utility model in conjunction with specific preferred embodiments. It should not be assumed that the specific implementation of the present utility model is limited to these descriptions. All equivalent changes and modifications made within the scope of this application should still fall within the scope of the present utility model.

Claims

1. A stable sofa bed frame, characterized in that, The system includes a fixed frame, a rear backrest bracket, a front backrest bracket, and a sliding frame that are hinged forward at the rear end of the fixed frame. A sliding guide rail is provided on the fixed frame. The sliding frame is connected to the sliding guide rail via a pulley assembly. The pulley assembly includes pulleys symmetrically arranged on the upper and lower sides of the sliding guide rail and a support plate that fixes the pulley shaft. The support plate is fixedly connected to the sliding frame.

2. The stable sofa bed frame according to claim 1, characterized in that, A recessed frame is provided in the middle of the front back support, and the thickness of the recessed frame is equal to the distance between the bottom of the translation frame and the fixed frame.

3. The stable sofa bed frame according to claim 1, characterized in that, The rear end of the translation guide rail is equipped with a soft limiting stop corresponding to the pulley.

4. The stable sofa bed frame according to claim 1, characterized in that, The pulley assembly is installed at the rear end of the translation frame, and a support roller is connected to the lower front end of the translation frame. The bottom of the support roller is on the same horizontal plane as the bottom of the fixed frame.

5. The stable sofa bed frame according to claim 1, characterized in that, The fixed frame is provided with translation guide rails at both ends. The width of the translation frame is less than the distance between the two translation guide rails. The left and right ends of the translation frame are respectively connected to the inner side of the translation guide rails through pulley assemblies.

6. The stable sofa bed frame according to claim 1, characterized in that, The translation frame is driven by a linear driver that is positioned at the front and rear of the lower middle section. The linear driver is fixedly mounted on the fixed frame.

7. The stable sofa bed frame according to claim 6, characterized in that, The side of the fixed frame is provided with a control button that is electrically connected to the linear actuator.

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