TWM677151U - sofa bed - Google Patents

Abstract

This invention relates to a sofa bed, which mainly comprises a fixed bed frame and a movable bed frame. A curved track extending from the upper end to the lower end is provided on the movable bed frame, and a lower leg mattress is installed on the curved track. A backrest frame is assembled from the fixed bed frame, and a backrest mattress is installed on the backrest frame. A power unit is provided between the fixed bed frame and the backrest frame. A drive unit is installed between the frame and the movable bed frame; thereby, the back frame is rotated and erected by the power unit, making it convenient for the user to sit up from a lying position. The drive unit also drives the movable bed frame to fold relative to the fixed bed frame, allowing the lower limb mattress to be stored along the curved track to the lower end of the movable bed frame, reducing the area of support for the user's lower limbs and allowing the user's feet to rest on the ground, assisting the user in standing up from a sitting position.

Description

sofa bed

This creation relates to the fields of healthcare and lifestyle mobile technology, and specifically refers to a sofa bed technology that assists users in lying down, getting up, sitting, and standing.

Note that the elderly, those with limb mobility impairments, those with mobility difficulties, or patients often experience inconvenience or slowness in movement, especially when getting up from a lying position or standing up from a sitting position. However, general medical and nursing beds are designed according to the user's treatment needs or lifestyle habits, providing family members with companionship and multiple nursing functions. For example, the "Care Bed" in Announcement No. M653688 includes a hinged first and second bed frame, as well as two retractable rear bed legs. The two retractable rear bed legs extend and retract synchronously to adjust the height of the second bed frame. By utilizing the retractable structure of the bed legs at the foot of the bed, the height of the foot of the bed can be lowered, making it easier for patients to get in and out of bed.

Or, according to announcement No. M657748, "Medical Bed," it mainly consists of a support column fixedly installed on the bed frame. The upper end of the support column bends upward toward the shoulder and back support plate, and a hook is fixedly installed at the upper end of the support column. A hanging ring is hung on the hook, and a handle is installed on the hanging ring. The patient can use the handle to hold onto it to get up. The handle design assists the patient in getting up, making it easier for patients with difficulty getting up to do so.

Or, as in announcement No. I880632, “A convertible bed with an assistive standing structure,” it includes several bed boards with several telescopic rods between them. These telescopic rods control the bed boards to allow a person to sit in a sitting position at the foot of the bed and to lie down when the bed is in a reclining position.

However, the aforementioned patented technologies are not ideal in actual use and have some shortcomings, which are explained in detail below:

1. Although the retractable rear bed legs of patent M653688 can adjust the height of the second bed frame for users to get in and out of bed, the tilted bed frame only allows the user's lower legs to be slightly bent relative to the thighs, and it cannot allow the feet to be firmly on the ground. Therefore, in this posture, the user needs sufficient leg muscle strength, waist strength and balance to stand up steadily from the bent position. This patented technology cannot effectively help users stand up steadily from lying or sitting positions.

2. Patent No. M657748 requires the user to hold the handles with both hands to stand up. Therefore, the user needs to have sufficient arm strength to support the weight of the whole body, which is not ideal for use.

3. Patent I880632 uses telescopic rods to control the bed boards to be in a sitting position at the foot of the bed (Figure 6 of the patent), and then moves the elderly or patients to the bed board to be in a sitting position before controlling them to lie down. Therefore, it can be seen that Patent I880632 does not provide a design that allows users to easily stand up from a sitting or lying position; even if the user does not need to be moved, when the bed board at the foot of the bed is folded down, their feet cannot touch the ground to stand up.

As explained above, the patented designs of beds used for medical and assistive devices are not ideal. In addition to the aforementioned individuals who require assistance with their limbs when lying down, sitting, or standing, even healthy individuals need to maintain good and correct posture when performing a series of limb movements, such as lying down, sitting, and standing. This is because sitting and standing are among the most common activities in daily life. As we age, the muscles of the lower limbs and trunk degenerate, or due to illness, the ability to sit and stand may decline, thus affecting other daily activities. To improve the ability to sit and stand, in addition to strengthening the muscles of the trunk and lower limbs, maintaining good standing posture is very important. If one can master the correct center of gravity transfer techniques, the stability of the movement can be improved, preventing injuries to muscles and bones and reducing the risk of falls. Therefore, the direction that the creator is eager to research and improve is to provide a device or structure that makes it easy for healthy people, the elderly, or patients to get up and get out of bed safely.

The primary purpose of this invention is to provide a sofa bed, particularly one designed to assist the user in lying down, getting up, sitting, and standing.

The main purpose and function of this sofa bed are achieved through the following specific technical means:

It mainly includes a fixed bed frame and a movable bed frame. The movable bed frame is provided with a curved track that extends from the upper end face to the lower end face, and a lower limb mattress is installed on the curved track. The fixed bed frame is assembled with a back frame, and a backrest mattress is installed on the back frame. A power unit is provided between the fixed bed frame and the back frame, and a drive unit is provided between the fixed bed frame and the movable bed frame.

In a preferred embodiment of this creative sofa bed, an armrest is installed on the fixed bed frame, one end of which is mounted on the backrest frame and the other end is mounted on a linkage, which is mounted on the fixed bed frame.

In a preferred embodiment of the creative sofa bed, the drive unit further includes a linear motor mounted on the fixed bed frame and a linear slide rail with a slide seat mounted on the movable bed frame.

In a preferred embodiment of the sofa bed, the hip frame is provided with a connecting piece, on which a first and a second support rod are provided. The first power unit is installed on the fixed bed frame, and its output shaft is connected to the first support rod. The second power unit is installed on the hip frame, and its output shaft is connected to the second support rod. The second support rod is provided with a linkage rod, which is connected to the back frame assembly.

In a preferred embodiment of this creative sofa bed, the first and second power units further employ linear motors.

To more fully and clearly reveal the technical content, creative purpose, and effects achieved in this work, a detailed explanation is provided below, along with the accompanying drawings and figure numbers:

First, please refer to Figures 1-3 and 6 and 8, which are schematic diagrams of the exterior and internal structure and cross-section of this sofa bed. The main components include:

A fixed bed frame (1) has an internal hub consisting of a hip frame (11) and a back frame (12) connected to the hip frame (11). A backrest mattress (2) is installed on the hip frame (11) and the back frame (12). A first power unit (13) is provided between the fixed bed frame (1) and the hip frame (11), and a second power unit (14) is provided between the hip frame (11) and the back frame (12). The first and second power units (13) and (14) respectively drive the hip frame (11) and the back frame (12) to rotate relative to the fixed bed frame (1).

A movable bed frame (3) is provided in relation to the fixed bed frame (1). A curved track (31) is provided on the movable bed frame (3) extending from the upper end face to the lower end face. A movable frame (32) is embedded in the curved track (31). The first end of the movable frame (32) is positioned on the fixed bed frame (1), and a lower limb mattress (4) is installed on the end face. A drive unit (5) is provided between the fixed bed frame (1) and the movable bed frame (3). The drive unit (5) drives the movable bed frame (3) to move and extend relative to the fixed bed frame (1), and allows the movable frame (32) to move within the curved track (31), so that the lower limb mattress (4) is displayed on the upper surface of the movable bed frame (3) or stored on the lower surface.

Please refer to Figures 2, 4 and 5. In one embodiment, an armrest (6) is installed on the fixed bed frame (1). One end of the armrest (6) is mounted on the back frame (12), and the other end is mounted on a link (61). The link (61) is mounted on the fixed bed frame (1). When the back frame (12) is driven to lift or lie flat, the direction of the armrest (6) can be changed by the hinge design to accommodate the user's grip.

Please refer to Figures 6 to 8. In one embodiment, the drive unit (5) further includes a linear motor (51) mounted on the fixed bed frame (1) and is provided with a linear slide rail (52), on which a slide seat (53) is provided, and the slide seat (53) is mounted on the movable bed frame (3).

Please refer to Figures 4-6. In one embodiment, the hip frame (11) is provided with a connecting piece (111), on which first and second support rods (112) and (113) are provided. The first power unit (13) is installed on the fixed bed frame (1), and its output shaft is connected to the first support rod (112). The second power unit (14) is installed on the hip. A frame (11) has its output shaft connected to a second support rod (113), and a linkage rod (114) is provided on the second support rod (113). The linkage rod (114) is connected to the back frame (12). In this way, the first and second power units (13) and (14) respectively drive the hip frame (11) and the back frame (12) to rotate relative to the fixed bed frame (1). In a preferred embodiment, the first and second power units (13) and (14) are further adopted as linear motors.

Before actually operating this creative sofa bed, let's explain the process of human body movement. The movement from sitting to standing requires first moving the body forward, adjusting the hips to the halfway point of the seat, bringing both legs back so the ankles are behind the knees, putting the thigh muscles in a more effective position. Lean forward, shifting the center of gravity forward, and then stand up diagonally forward, maintaining stability throughout the process. The principle behind the standing movement of this creative sofa bed is:

1. The institution elevates a person from a lying position to a sitting position by pushing them up from behind the backrest of the mattress;

2. The leg support mattress retracts under the bed, allowing the person to easily get out of bed.

Please refer to Figures 1 through 12. The following details the actual process of performing the above actions:

The first and second power units (13), (14) and drive unit (5) of this creative sofa bed are connected to a controller [not shown in the figure]. The controller can be wired, wireless or installed on the sofa bed, and the operation of the sofa bed is controlled through the controller. First, as shown in Figures 1 to 2 and 10, when used as a bed, the slide (53) of the drive unit (5) is mounted on the movable bed frame (3) at one end of the linear slide rail (52) away from the linear motor (51). At this time, the fixed bed frame (1) and the movable bed frame (3) are relatively far apart. At the same time, the output shafts of the first and second power units (13) and (14) are retracted so that the back frame (12) and the hip frame (11) are in a horizontal state, allowing the user to lie on the backrest mattress (2) and the lower limb mattress (4).

Please refer to Figures 3 to 6 and 11. When used as a sofa, the first and second power units (13) and (14) are operated synchronously by the controller. When the output shaft of the first power unit (13) pushes the first support rod (112), it drives the connecting plate (111) to rotate the hip frame (11) upward. At the same time, the second support rod (113) on the connecting plate (111) is connected to the second power unit (14) and drives the back frame (12) to rotate through the linkage rod (114), so that the hip frame (11) and the back frame (12) rotate and move synchronously, so that the backrest mattress (2) stands up and helps the user sit up.

Please refer to Figures 7-9 and 12. When the user wants to stand up, the controller operates the drive unit (5) to move the slide (53) on the linear slide rail (52) from the end away from the linear motor (51) towards the linear motor (51), thereby moving the movable bed frame (3) towards the fixed bed frame (1). When the movable bed frame (3) shortens its overall length, since the first end of the movable frame (32) is positioned on the fixed bed frame (1), the movable frame (32) moves the lower limb mattress (4) within the curved track (31) and towards the lower end of the movable bed frame (3). The curved track (31) is stored [as shown in Figures 8-9]; at this time, please refer to Figure 12, so that the user's legs can hang down and touch the ground. Because the lower limb mattress (4) is perfectly stored at the bottom, there is enough space for the legs to hang down, allowing the user to adopt a stable posture with both feet pulled back and the ankles on the back of the knees. The backrest mattress (2) of this creation is designed with two areas: the hip frame (11) and the back frame (12). When the user stands up from a sitting position, the hip frame (11) helps to support the hips upward and, together with the user's thigh muscles, effectively helps the user stand up in the correct posture.

However, the foregoing embodiments or diagrams are not intended to limit the product structure or usage of this invention. Any appropriate changes or modifications made by those skilled in the art should be considered as not departing from the patent scope of this invention.

As can be seen from the above, the features of this invention have the following advantages and effects compared to conventional structures, as explained below:

1. This creative sofa bed can be used as a bed, sofa chair, or medical assistive bed, effectively helping able-bodied people, the elderly, or people with physical disabilities to get up and exercise with the correct posture while sitting or lying down.

2. This creative sofa bed can save space by reducing its size.

3. This sofa bed uses a power unit to drive the back frame to rotate and stand up, making it easy for users to get up from a lying position to a sitting position. The drive unit also drives the movable bed frame to fold down relative to the fixed bed frame, allowing the lower limb mattress to be stored along the curved track to the lower end of the movable bed frame. This reduces the area of support for the user's lower limbs, allowing the user's feet (bottom) to be firmly on the ground. It helps the user to easily get up from a sitting position by using the support of the calves and the strength of the thigh muscles.

In conclusion, this invention embodiment can indeed achieve the expected use effect, and the specific structure disclosed therein has not only never been seen in similar products, but has also never been disclosed before the application. It fully complies with the provisions and requirements of the Patent Law. Therefore, I hereby file an application for an invention patent and earnestly request your kind consideration and permission to grant the patent. I would be truly grateful for your assistance.

1: Fixed Bed Frame 11: Hip Frame 111: Connecting Plate 112: First Support Rod 113: Second Support Rod 114: Linkage Rod 12: Backrest Frame 13: First Power Unit 14: Second Power Unit 2: Backrest Mattress 3: Movable Bed Frame 31: Curved Track 32: Movable Frame 4: Lower Limb Mattress 5: Drive Unit 51: Linear Motor 52: Linear Slide Rail 53: Slide Seat 6: Armrests 61: Linkage Rod

Figure 1: Schematic diagram of the exterior of this creation. Figure 2: Schematic diagram of the sofa bed with the outer shell disassembled, revealing the internal structure. Figure 3: Schematic diagram of the backrest mattress in the upright position. Figure 4: Schematic diagram of the hip and back frames in upright position (first illustration). Figure 5: Schematic diagram of the hip and back frames in upright position (second illustration). Figure 6: Cross-sectional view of the hip and back frames in upright position. Figure 7: Schematic diagram of the movement of the movable bed frame driven by the drive unit. Figure 8: Cross-sectional view of the movable bed frame moved by the drive unit and the lower limb mattress stowed. Figure 9: Schematic diagram of the sofa chair with the backrest mattress upright and the lower limb mattress stowed. Figure 10: Schematic diagram of the user lying flat on the sofa bed. Figure 11: Schematic diagram of the user sitting upright. Figure 12: A diagram illustrating the user's posture when standing after the lower limb mattress is folded up.

1: Fixed bed frame

11: Hip Frame

113: Second support pole

114: Linkage rod

12: Back Frame

13: First Power Unit

3: Movable bed frame

31: Curved Track

32: Movable Frame

4: Lower Limb Mattress

5: Drive Unit

6: Handrails

61: Linkage

Claims (5)

A sofa bed mainly comprises: a fixed bed frame, an internal assembly of a hip frame and a back frame connected to the hip frame, and a backrest mattress mounted on the hip frame and the back frame; a first power unit is provided between the fixed bed frame and the hip frame, and a second power unit is provided between the hip frame and the back frame; the first and second power units respectively drive the hip frame and the back frame to rotate relative to the fixed bed frame. A movable bed frame is designed in relation to a fixed bed frame. The movable bed frame has a curved track that extends from the upper end to the lower end. A movable frame is embedded in the curved track, and the first end of the movable frame is positioned on the fixed bed frame. A lower limb mattress is installed on the end face of the movable frame. A drive unit is provided between the fixed bed frame and the movable bed frame. The drive unit drives the movable bed frame to move and extend relative to the fixed bed frame, and allows the movable frame to move within the curved track, so that the lower limb mattress is displayed on the upper end face of the movable bed frame or stored on the lower end face. The sofa bed as described in claim 1, wherein an armrest is installed on the fixed bed frame, one end of the armrest is mounted on the backrest frame and the other end is mounted on a linkage, the linkage being mounted on the fixed bed frame. The sofa bed as described in claim 1 or 2, wherein the drive unit further includes a linear motor mounted on the fixed bed frame and is provided with a linear slide rail on which a slide seat is provided, the slide seat being mounted on the movable bed frame. As described in claim 3, the sofa bed has a connecting piece on the hip frame, and a first and a second support rod on the connecting piece. The first power unit is installed on the fixed bed frame, and its output shaft is connected to the first support rod. The second power unit is installed on the hip frame, and its output shaft is connected to the second support rod. The second support rod has a linkage rod, which is connected to the back frame assembly. The sofa bed as described in claim 1, wherein the first and second power units are further employing linear motors.