CN221813600U - Bedstead, mattress and electric bed - Google Patents

Abstract

A bed frame, a mattress and an electric bed, the bed frame comprises a base (1), a first frame (2), a second frame (3), a third frame (4) and a fourth frame (9). The first frame (2) is used for supporting the buttocks of a human body and is movably connected with the base (1). The second frame (3) is used for supporting the back of the human body and is movably connected with the first end (2 a) of the first frame (2). The third frame (4) is used for supporting the thigh of the human body and is movably connected with the second end (2 b) of the first frame (2). The fourth frame (9) is used for supporting the lower leg of the human body, one end of the fourth frame is hinged with the third frame (4), and the other end of the fourth frame is suspended. The bed frame has a first state and a second state, wherein the tilting angle of the first frame (2) and the third frame (4) in the first state is smaller than that in the second state, and the second end (2 b) of the first frame (2) is tilted in the second state. The bed frame has simple and reliable structure and is more comfortable to use.

Description

Bed frame, mattress and electric bed

Priority information: This application claims priority to the Chinese patent application with application number 202210412159.9 filed on April 19, 2022.

Technical Field

The utility model relates to the technical field of bedding, in particular to a bed frame, a mattress and an electric bed.

Background Art

An electric bed is a bed that can electrically control the height and angle of the head and tail of the bed board. Its bed frame usually includes a back support frame, a hip support frame and a leg support frame, which are used to support the back, hips and legs of the person respectively. The back support frame and the leg support frame can change their angle relative to the hip support frame under the drive of a motor, electric cylinder or other driving device. Users can adjust the angle according to their needs to obtain the best user experience.

Existing electric beds often have the following shortcomings:

1. When the state of the existing electric bed frame changes, the back support frame and the leg support frame rise up, while the hip support frame is usually fixed, and only a few can move forward and backward. In different usage states, the hip support frame always remains in a horizontal state, which is not conducive to improving the comfort of use.

2. When the state of the bed frame of an existing electric bed changes, only the back support frame and the leg support frame change their angles around the fixed connection axis, which can easily cause a clamping feeling. Especially when the angle changes after the user falls asleep, it is easy to wake the user and affect the user's sleep quality.

3. In order to achieve the angle change of each part of the bed frame, the existing electric bed needs to be equipped with multiple driving devices to drive the bed frame to deform. The provision of multiple driving devices leads to high cost of electric beds, which is difficult to reduce and is not conducive to the popularization of electric beds. At the same time, it also increases the complexity of bed frame assembly, especially when installed in a limited installation space, the assembly is more difficult. In addition, it also leads to a large bed board mass and inconvenient transportation.

Therefore, it is necessary to improve the prior art to overcome the above defects in the prior art.

Utility Model Content

The utility model aims to provide a bed frame, a mattress and an electric bed, which are more comfortable to use.

In order to achieve the above-mentioned purpose of the utility model, in the first aspect, the utility model proposes a bed frame, comprising:

Pedestal;

A first frame, used to support the buttocks of a human body, wherein the first frame is movably connected to the base;

A second frame, used for supporting the back of a human body, the second frame being movably connected to the first end of the first frame;

A third frame is used to support the thigh of a human body, and the third frame is movably connected to the second end of the first frame; and

A fourth frame is used to support the lower leg of a human body, one end of the fourth frame is hinged to the third frame, and the other end is suspended;

The bed frame has a first state suitable for a person to lie flat and a second state suitable for a person to sit, the tilting angles of the first frame and the third frame in the first state are smaller than the tilting angles in the second state, and in the second state, the second end of the first frame is tilted;

The bed frame further comprises a linkage mechanism, the linkage mechanism comprises a first connecting rod, the first connecting rod is hinged to the base and the first end of the first frame, and the first frame comprises a connecting shaft movably connected to the base;

When the bed frame switches from the first state to the second state, the connecting shaft moves along an arc trajectory toward the side where the second frame is located, and during the movement, the distance between the first end and the bottom surface of the base first decreases and then increases, and the first connecting rod swings toward the direction where the second frame is located, and the distance between the first end and the bottom surface of the base gradually decreases.

Furthermore, when the bed frame switches from the first state to the second state, the distance between the first frame and the second frame gradually increases.

Further, the first frame is provided with an extension plate portion extending toward the base;

The linkage mechanism includes a second connecting rod, and the second connecting rod is hinged to the extension plate and the base; or,

The base is provided with an arc-shaped arc hole, the connecting shaft is arranged on the extension plate portion and penetrates the arc hole, and the arc hole limits the connecting shaft from moving along the center line of the arc hole.

Further, the linkage mechanism includes a third link hinged to the second frame and the base, a fourth link hinged to the first link and the third link, and a fifth link hinged to the second frame and the fourth link respectively, and the hinge point between the fourth link and the first link and the hinge point between the fourth link and the fifth link are respectively located on both sides of the hinge point between the third link and the fourth link.

Further, in the four-bar mechanism formed by the third link, the fourth link, the first link and the base, the distance D between the hinge point of the third link and the fourth link and the hinge point of the third link and the base 1 is the shortest, the distance E between the hinge point between the third link and the base 1 and the hinge point of the first link and the base is the longest, and there is a distance F between the hinge point of the third link and the fourth link and the hinge point of the fourth link and the first link, there is a distance G between the hinge point of the fourth link and the first link and the hinge point of the first link and the base 1, and the sum of the distance F and the distance G is greater than the sum of the distance D and the distance E;

In the four-bar mechanism composed of the second frame, the third link, the fourth link and the fifth link, the distance H between the hinge point between the third link and the second frame and the hinge point between the third link and the fourth link is the shortest, the distance I between the hinge point between the fourth link and the fifth link and the hinge point between the fifth link and the second frame 3 is the longest, the distance J between the hinge point between the fifth link and the second frame 3 and the hinge point between the third link and the second frame is, the distance K between the hinge point between the fourth link and the fifth link and the hinge point between the third link and the fourth link is, and the sum of the lengths of the distance H and the distance I is less than the sum of the lengths of the distance J and the distance K.

Furthermore, the third frame is hinged to the second end of the first frame, and the linkage mechanism includes a sixth connecting rod and a seventh connecting rod, the sixth connecting rod is hinged to the base and the third frame, and the seventh connecting rod is located below the third frame and is hinged to the first frame and the fourth frame.

Furthermore, when the bed frame is in the third state, the angle between the sixth connecting rod and the bottom surface is 75° to 105°.

Furthermore, the bed frame further comprises a linear drive device connected between the base and the second frame, and the linear drive device is electric, hydraulic, pneumatic or manual;

The base, the first frame, the second frame, the third frame and the fourth frame are all movably connected to the linkage mechanism, and when one of the first frame, the second frame, the third frame and the fourth frame is driven to move, the remaining frames move under the drive of the linkage mechanism;

The bed frame further comprises a gas spring, and the gas spring is connected between the first frame and the fourth frame, or the gas spring is connected between the base and the fourth frame.

Furthermore, the bed frame has a third state, which is a zero gravity mode. As the first frame is tilted, the bed frame passes through the first state, the third state and the second state in sequence.

The tilting angle of the second frame in the third state is greater than the tilting angle in the first state and smaller than the tilting angle in the second state;

The tilting angle of the third frame in the second state is smaller than the tilting angle in the third state;

In the first state, the upper surfaces of the first frame, the second frame, the third frame and the fourth frame are flush;

In the second state, the tilting angle of the second end of the first frame is 5° to 10°, the tilting angle of the second frame is 45° to 60°, and the tilting angle of the third frame is 15° to 25°;

In the third state, the tilting angle of the first end or the second end of the first frame is 0° to 3°, the tilting angle of the second frame is 20° to 35°, and the tilting angle of the third frame is 20° to 35°.

Further, in the first state, the upper surfaces of the first frame, the second frame, the third frame and the fourth frame are flush and in a horizontal state;

In the second state, the hinge point between the fourth frame and the third frame is lower than the suspended end of the fourth frame;

In the third state, a hinge point between the fourth frame and the third frame is higher than a suspended end of the fourth frame.

Furthermore, in the first state, the second frame portion is arranged opposite to the base, there is a gap between the second frame and the base in the height direction, and the length of the portion where the second frame and the base are arranged opposite to each other ranges from 8 cm to 15 cm.

Furthermore, when the bed frame is in use, it is placed on an external fixed object and is not fixedly connected to the fixed object; or, when the bed frame is in use, the base is fixedly connected to an external fixed object.

In a second aspect, the utility model provides a mattress, comprising a bed frame as described in any one of the above items.

In a third aspect, the utility model proposes an electric bed, comprising a bed frame as described in any one of the above items or comprising a mattress as described above.

Compared with the prior art, the utility model has the following beneficial effects:

In the utility model, when the bed frame is in the second state, the second end of the first frame is tilted, so that when the back is leaning against the second frame to rest, the first frame will drive the human body to be close to the second frame, making it easier to maintain the human body's leisure posture. At the same time, the tilting directions of the first frame and the third frame are consistent, and the transition between the two is smoother and more natural, making it more comfortable to use.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a schematic structural diagram of a bed frame according to an embodiment of the present invention, in which the bed frame is in a first state.

FIG. 2 is a front view of the bed frame shown in FIG. 1 .

FIG. 3 is a schematic structural diagram of the bed frame shown in FIG. 1 when it is in a second state.

FIG. 4 is a front view of the bed frame shown in FIG. 3 .

FIG. 5 is a schematic structural diagram of the bed frame shown in FIG. 1 when it is in a third state.

FIG. 6 is a front view of the bed frame shown in FIG. 5 .

FIG. 7 is a schematic diagram of the connection of the first frame, the base and the first connecting rod in one embodiment of the present invention.

FIG. 8 is a hinge structure of a first connecting rod and a base in one embodiment of the present invention.

FIG. 9 is an enlarged view of portion I in FIG. 5 .

FIG. 10 is a schematic diagram showing the connection of the first frame, the base and the first connecting rod in another embodiment of the present invention.

FIG. 11 is a schematic structural diagram of the bed frame shown in FIG. 1 when it is in the third state, in which hidden lines are shown by dotted lines.

FIG. 12 is an enlarged view of part II in FIG. 11 .

FIG. 13 is an enlarged view of portion III in FIG. 11 .

FIG. 14 is a schematic diagram of the connection between the first frame, the third frame, the fourth frame and the seventh connecting rod in the present invention.

DETAILED DESCRIPTION

In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. It is understandable that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for ease of description, only some structures related to the present application are shown in the accompanying drawings, rather than all structures. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

The terms "including" and "having" and any variations thereof in this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products or devices.

Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

As shown in FIGS. 1 to 14 , the utility model provides a bed frame, which includes a base 1 , a first frame 2 , a second frame 3 , a third frame 4 and a fourth frame 9 .

The first frame 2 is used to support the buttocks of the human body, the second frame 3 is used to support the back of the human body, the third frame 4 is used to support the thigh of the human body, and the fourth frame 9 is used to support the calf of the human body. When a person lies on the bed, usually his back and head correspond to the position of the first frame 2, the buttocks are located on the first frame 2, the position of the thigh corresponds to the third frame 4, and the calf and foot correspond to the fourth frame 9.

The first frame 2 is movably connected to the base 1 and can move relative to the base 1. Referring to FIG2 , the first frame 2 has two ends along the length direction of the bed frame, namely a first end 2a and a second end 2b, wherein the first end 2a is movably connected to the second frame 3, and the second end 2b is movably connected to the third frame 4. During the deformation process of the bed frame, the base 1 is fixed, and the first frame 2, the second frame 3 and the third frame 4 can move relative to the base 1.

The bed frame has a first state suitable for a person to lie flat and a second state suitable for a person to sit (leisure mode). Referring to Figures 1 to 4, Figures 1 and 2 show the situation when the bed frame is in the first state, and Figures 3 and 4 show the situation when the bed frame is in the second state. In the first state, the tilting angle of the third frame 3 relative to the base 1 is smaller than its tilting angle in the second state. In this way, in the second state, the second frame 3 has a larger inclination angle so that people can lean back to rest or entertain, playing a similar function to a sofa backrest. For the convenience of description and understanding, in this embodiment, the tilting angle of the frame can be understood as the angle between its upper surface and the bottom surface 11 of the base 1 (preferably, when the bed frame is in use, its bottom surface 11 is parallel to or coincides with the horizontal plane), such as the angle A1 and the angle A2 shown in Figures 4 and 6. Of course, in other embodiments, other reference planes can also be selected to describe the tilting angle, such as selecting the horizontal plane as the reference plane.

In the second state, referring to FIG4 , the first frame 2 is arranged to be in an inclined state, and its first end 2a is closer to the base 1 relative to the second end 2b (i.e., the second end 2b is tilted). In this way, the end of the first frame 2 close to the human leg is tilted, so that the buttocks have a tendency to move toward the second frame 3. With the tilted third frame 4, the person can naturally lean against the second frame 3, which is more comfortable and stable. The tilting angle A4 of the first frame 2 is preferably 5 to 10°, and more preferably 7°. As a preferred embodiment, in the second state, the tilting angle A3 of the third frame 4 is greater than the tilting angle A4 of the first frame 2.

As a preferred embodiment, when the bed frame switches from the first state to the second state, the distance between the adjacent ends of the first frame 2 and the second frame 3 gradually increases. Referring to Figures 2 and 4, in the first state, the distance between the adjacent ends of the first frame 2 and the second frame 3 is C1, and in the second state, the distance between the adjacent ends of the first frame 2 and the second frame 3 is C2, and C2 is greater than C1. In this way, when the bed frame changes from the first state to the second state, the first frame 2 and the second frame 3 move away from each other and gradually pull apart in the process of changing the angle, and will not bend the human body like a simple rotation around the axis, causing the human body to feel clamped. The process is smoother and more comfortable, so that when the bed frame changes its posture when the user is asleep, it is not easy to wake up the user, fully ensuring the user's sleep quality.

As a preferred embodiment, the bed frame also has a third state. Referring to Figures 5 and 6, Figures 5 and 6 show schematic diagrams of the bed frame in the third state. The tilting angle A2 of the second frame 3 in the third state is greater than the tilting angle in the first state and less than the tilting angle A1 in the second state. That is to say, in the process of tilting, the bed frame passes through the third state and the second state in sequence from the first state. In this embodiment, the third state is a zero gravity mode. In this mode, the user's head and legs are lifted to a preset angle, so that the pressure of various parts of the body is evenly dispersed, which can effectively reduce the burden on the spine and relieve the blood circulation pressure caused by sitting or standing for a long time.

Furthermore, in the third state, the first frame 2 is configured to be in a horizontal state or a nearly horizontal state. Preferably, in the third state, the tilting angle of the first end 2a or the second end 2b of the first frame 2 is 0° to 3°. In this way, in the zero gravity mode of the third state, the first frame 2 supports the buttocks more stably, conforms to ergonomics, is more comfortable when lying down, is conducive to eliminating fatigue, promotes sleep, and is conducive to falling asleep for people with insomnia or difficulty sleeping.

The first frame 2, the second frame 3, the third frame 4 and the fourth frame 9 are all located above the base 1, so that the human body can be supported by the frames when lying down.

As described above, the first state is a state suitable for a person to lie flat, and at this time, it is similar to an ordinary bed, and the bed body is in a flat state. In a preferred embodiment, in the first state, the upper surfaces of the first frame 2, the second frame 3, the third frame 4 and the fourth frame 9 are flush and in a horizontal state. In other embodiments, the second frame 3 can also be tilted at a certain angle, such as 0 to 5 degrees, as long as it does not affect lying flat.

As a preferred embodiment, in the second state, the tilting angle of the second frame 3 is above 45°, preferably 45° to 60°, and the tilting angle of the third frame 4 is below 25°, preferably 15° to 25°. Further preferably, in the second state, the tilting angle of the second frame 3 is 50°, and at this time, the tilting angle of the third frame 4 is 20°. This allows the user to get support at a suitable angle when in a leisure posture, such as reading or watching TV, and is more comfortable.

As a preferred embodiment, in the third state, the tilting angle of the second frame 3 is 20° to 35°, and the tilting angle of the third frame 4 is 20° to 35°. Preferably, in the third state, the tilting angle of the second frame 3 is 25°, and the tilting angle of the third frame 4 is 30°. This allows the user to lie more comfortably in the zero-gravity mode.

When switching from the first state to the third state and then to the second state, the tilting angle of the second frame 3 gradually increases, while the tilting angle of the third frame 4 first increases and then decreases, and the first end 2a of the first frame 2 first tilts, and then the second end 2b tilts. When changing from the lying posture of the zero gravity mode (third state) to the leisure mode (second state), the legs can be automatically put down, and the mode switching is smoother and more natural, and more ergonomic. Preferably, in the third state, the tilting angle of the third frame 4 is the largest, and its tilting angle gradually decreases during the process of switching from the third state to the second state.

In a preferred embodiment, during the state switching process, multiple driving devices (such as motors, electric push rods, electric cylinders, etc.) are set to drive the corresponding frames to achieve movement. For example, one or more electric push rods are set at the first frame 2, the second frame 3 and the third frame 4 to achieve angle and position changes of each frame.

In another preferred embodiment, the bed frame further includes a linkage mechanism and a linear drive device 5. The base 1, the first frame 2, the second frame 3 and the third frame 4 are all movably connected to the linkage mechanism, and the linkage mechanism is used to realize the linkage of the actions between the frames. For example, when the angle of the second frame 3 changes, the angles of the first frame 2, the third frame 3 and the fourth frame 9 also change accordingly under the drive of the linkage mechanism. The linear drive device 5 is used to drive one of the first frame 2, the second frame 3 and the third frame 4 to move, and then drive the other two frames to move through the linkage mechanism to realize the posture change. The linear drive device 5 can realize telescopic movement in the linear direction, and it can be a manual (such as a manual push rod), pneumatic (such as a cylinder), hydraulic (such as a hydraulic cylinder) or electric (such as an electric push rod, an electric cylinder) device. Preferably, the linear drive device 5 is electric, which only needs a power supply to work, is more convenient to use, and has low noise.

Since the linkage mechanism is adopted, only one linear drive device 5 is needed to realize the linkage of each frame. The number of linear drive devices 5 is small, which greatly reduces the overall cost. At the same time, since a suitable position can be selected for installation, the installation is more convenient. In addition, the reduction in the number of linear drive devices 5 can also reduce the weight of the bed frame and even the entire electric bed, making it easier to carry and install.

Referring to Figure 7, the linkage mechanism includes a first connecting rod 60 connected between the base 1 and the first frame 2, and both ends of the first connecting rod 60 are hinged to the base 1 and the first end 2a of the first frame 2 respectively, so that the first connecting rod 60 and the base 1 and the first frame 2 can rotate relative to each other. There is no limit to the hinge method. For example, the hinge method shown in Figure 8 can be adopted. In Figure 8, the base 1 and the first connecting rod 60 are hinged by a bolt 13. Specifically, the bolt 13 has a head 130 with a larger cross-sectional size, an optical axis portion 131 connected to the head 130, and a threaded portion 132 connected to the optical axis portion 131. The optical axis portion 131 is passed through the base 1 and the first connecting rod 60. The optical axis portion 131 is a cylindrical axis so that the base 1 and the first connecting rod 60 can rotate around the axis of the optical axis portion 131. A nut 133 can be provided on the threaded portion 132 to prevent the first connecting rod 60 from disengaging from the base 1. A step or a positioning sleeve 134 can be provided on the optical axis portion 131 to limit the first connecting rod 60.

Referring to Figures 7 and 9, the first frame 2 is provided with an extension plate portion 20 extending toward the base 1 and a connecting shaft 21 provided on the extension plate portion 20, the connecting shaft 21 is used to connect with the base 1, and the connecting shaft 21 is preferably located near the lower end of the extension plate portion 20. When the second frame 3 moves, the connecting shaft 21 of the first frame 2 moves along an arc trajectory. When the bed frame switches from the first state to the second state, the connecting shaft 21 moves toward the direction where the second frame 3 is located (i.e., moves to the left), and during the movement, the distance between the connecting shaft 21 and the bottom surface 11 of the base 1 first decreases and then increases, that is, the connecting shaft 21 moves downward and then upward in the process of moving toward the direction where the second frame 3 is located, and the first connecting rod 60 swings toward the direction where the second frame 3 is located, and preferably, its height gradually decreases. In this way, during the process of the second frame 3 tilting, the first end 2a of the first frame 2 gradually decreases, and its second end 2b first decreases and then increases. Obviously, by changing parameters such as the size of the first connecting rod 60 and the first frame 2 and the curvature of the arc track, the inclination angle of the first frame 2 in the second state and the third state can be changed.

There are many ways to achieve the movement of the connecting shaft 21 along a circular arc trajectory. Two preferred embodiments are described below.

In the first embodiment, referring to FIG10 , the linkage mechanism includes a second link 61, and both ends of the second link 61 are respectively hinged to the connecting shaft 21 of the base 1 and the first frame 2. The hinge point 610 between the second link 61 and the first frame 2 is lower than the hinge point 611 between the second link 61 and the base 1, the hinge point 611 is at the same position as the center of the arc trajectory, and the distance between the hinge point 611 and the hinge point 610 is the same as the radius of the arc trajectory, so that when the second link 61 swings, an arc trajectory with high ends and low middle can be formed.

In the second embodiment, referring to Figures 7 and 9, the base 1 is provided with an arc-shaped arc hole 10, and the connecting shaft 21 is inserted into the arc hole 10, and can move along the arc hole 10. Obviously, the shape of the arc hole 10 can limit the moving trajectory of the connecting shaft 21. By controlling the size and shape of the arc hole 10, the connecting shaft 21 can be moved along a preset arc trajectory. In Figure 7, the center line 100 of the arc hole 10 is arc-shaped, and the distances between its two ends and the bottom surface 11 of the base 1 are greater than the distance between the bottom of the center line 100 and the bottom surface 11 of the base 1. When the connecting shaft 21 moves, it moves along the center line 100, and the center line 100 can be regarded as its arc trajectory. The connecting shaft 21 can be slidably matched with the inner wall of the arc hole 10, or a rolling element 22 such as a bearing or a roller can be set on the connecting shaft 21. Through the clearance fit between the rolling element and the arc hole 10, when the connecting shaft 21 moves, sliding can be changed to rolling, thereby reducing wear and extending the service life, while also reducing noise and improving the smoothness of movement. Referring to Figure 9, the rolling element 22 is preferably a bearing.

Preferably, when the bed frame is in the first state, the first connecting rod 60 is in a vertical state, which can provide a stronger supporting effect.

Referring to Figures 11 and 12, in this embodiment, in order to realize the linkage between the second frame 3 and the first frame 2, the linkage mechanism includes a third link 70 whose two ends are respectively hinged to the second frame 3 and the base 1, a fourth link 71 which is hinged to both the first link 60 and the third link 70, and a fifth link 72 whose two ends are respectively hinged to the second frame 3 and the fourth link 71. Among them, the two hinge points 70a and 70b between the third link 70 and the second frame 3 and the base 1 are located on both sides of the hinge point 70c of the third link 70 and the fourth link 71, preferably at both ends of the third link 70. The two hinge points 71a and 71b between the fourth link 71 and the first link 60 and the fifth link 72 are respectively located on both sides of the hinge point 70c of the fourth link 71 and the third link 70, preferably at both ends of the fourth link 71. Further preferably, the hinge point 70c of the third link 70 and the fourth link 71 is located in the middle of the two links.

Obviously, by controlling the distance between each hinge point, the angle and speed of the second frame 3 relative to the first frame 2 during the change of the bed frame state can be controlled. As a preferred embodiment, in the four-bar mechanism composed of the third connecting rod 70, the fourth connecting rod 71, the first connecting rod 60 and the base 1, the distance D between the hinge point 70c and the hinge point 70b is the shortest, the distance E between the hinge point 70b and the hinge point 60a (the hinge point of the first connecting rod 60 and the base 1) is the longest, and the sum of the distance F between the hinge point 70c and the hinge point 71a and the distance G between the hinge point 71a and the hinge point 60a is greater than the sum of the distance D and the distance E. In the four-bar mechanism composed of the second frame 3, the third link 70, the fourth link 71 and the fifth link 72, the distance H between the hinge point 70a and the hinge point 70c is the shortest, the distance I between the hinge point 71b and the hinge point 72a (the hinge point of the fifth link 72 and the second frame 3) is the longest, and the sum of the lengths of the distances H and I is less than the sum of the lengths of the distances J and K, wherein the distance J is the distance between the hinge point 72a and the hinge point 70a, and the distance K is the distance between the hinge point 71b and the hinge point 70c. In this way, when the second frame 3 is linked with the first frame 2, it is more stable and comfortable.

Further, referring to FIG. 11 and FIG. 13, in order to realize the linkage between the third frame 4 and the first frame 2, the linkage mechanism further includes a sixth connecting rod 8, which is hinged to the base 1 and the third frame 4, respectively. Preferably, the hinge points 8a and 8b between the sixth connecting rod 8 and the base 1 and the third frame 4 are respectively located at both ends of the sixth connecting rod 8. The third frame 4 is hinged to the first frame 2 to form a hinge point 4a. In this way, during the movement of the first frame 2, the sixth connecting rod 8 can swing while supporting the third frame 4, thereby realizing the linkage between the third frame 4 and the first frame 2. The sixth connecting rod 8 always swings toward the side where the first frame 2 is located during the tilting of the second frame 3, and it swings from the right side in the vertical direction to the left side in the vertical direction. In conjunction with the movement of the first frame 2, it can be realized that the tilting angle of the third frame 4 increases first and then decreases during the tilting of the second frame 3. Specifically, since the hinge point 4a gradually descends and moves to the left, and the hinge point 8b gradually rises during the movement of the first frame 2 to the side where the third frame 3 is located, the sixth connecting rod 8 can support the third frame 4 to tilt; when the sixth connecting rod 8 passes the vertical position, the hinge point 4a gradually rises, and the hinge point 8b gradually descends, so the sixth connecting rod 8 drives the third frame 4 to gradually flatten (that is, the tilting angle decreases).

Obviously, by controlling the distance between each hinge point, the angle and speed of the third frame 4 relative to the first frame 2 during the state change of the bed frame can be controlled. As a preferred embodiment, the base 1 is provided with a protrusion 14 protruding toward the side where the first frame 2 is located, and the hinge point 8a is located on the protrusion 14, which is located on the right side of the arc hole 10 and is higher than the center of the arc trajectory. When the bed frame is in the third state, the angle A7 between the sixth connecting rod 8 and the bottom surface 11 is 75° to 105°. Further preferably, when the bed frame is in the third state, the sixth connecting rod 8 is in a vertical state, at which time the tilting angle of the third frame 4 is the largest, and during the tilting process of the third frame 4, the angle change rate is preferably greater than the angle change rate when it is flat, that is, the third frame 4 can be quickly tilted first and then slowly laid flat, which is more comfortable to use.

One end of the fourth frame 9 is hinged to the third frame 4, and the other end is suspended.

As a preferred embodiment, referring to Fig. 1 and Fig. 2, in the first state, the upper surfaces of the first frame 2, the second frame 3, the third frame 4 and the fourth frame 9 are flush and in a horizontal state, so that people can lie flat on the electric bed. In the second state, referring to Fig. 3 and Fig. 4, the height of the hinge point 9a between the fourth frame 9 and the third frame 4 is lower than the height of the suspended end 9b of the fourth frame 9, so that when people are in a leisure sitting state, both the thigh and the calf can be naturally lifted, and the knee bending degree is small. As a preferred embodiment, in this state, the angle A5 between the fourth frame 9 and the third frame 4 is less than 180°. In the third state, referring to Fig. 6, the height of the hinge point 9a is higher than the height of the suspended end 9b, and the angle A6 between the fourth frame 9 and the third frame 4 is less than the angle A5 between the two in the second state, so that when people rest in zero gravity mode, the knee bending degree is greater, which is more suitable for relieving stress and promoting sleep. With such arrangement, the height of the suspended end 9b of the fourth frame 9 does not change much when switching between the third state and the second state (preferably, the height change is less than 5 cm, and further preferably, the height of the suspended end 9b remains unchanged in the two states), and the height is more constant, which can reduce the increase in the overall center of gravity during the state change and make the operation smoother. In addition, the distance between the bed frame and external fixed objects (such as bed boards) can be reduced, reducing the risk of objects or human bodies entering between the two.

In order to realize linkage between the fourth frame 9 and the third frame 4, as shown in FIG. 11 and FIG. 14, the linkage mechanism further includes a seventh connecting rod 80 whose two ends are respectively hinged to the extension plate portion 20 and the fourth frame 9, and the seventh connecting rod 80 is located below the third frame 4, and the hinge point 80a between the seventh connecting rod 80 and the extension plate portion 20 is located between the connection shaft 21 and the hinge point 4a, that is, the height of the hinge point 80a is higher than the connection shaft 21 and lower than the hinge point 4a. During the movement of the first frame 2 and the third frame 4, the fourth frame 9 can rotate relative to the third frame 4 driven by the seventh connecting rod 80, thereby changing the tilt angle.

Obviously, by controlling the distance between each hinge point, the angle and speed of the fourth frame 9 relative to the third frame 4 during the state change of the bed frame can be controlled. As a preferred embodiment, the four-bar mechanism composed of the first frame 2, the third frame 4, the fourth frame 9 and the seventh connecting rod 80 is a parallelogram connecting rod mechanism, and the distance M between the hinge point 80b (the hinge point between the seventh connecting rod 80 and the fourth frame 9) and the hinge point 9a (the hinge point between the third frame 4 and the fourth frame 9) is the same as the distance P between the hinge point 4a and the hinge point 80a, and the distance N between the hinge point 80a and the hinge point 80b is the same as the distance O between the hinge point 9a and the hinge point 4a. Of course, it is not limited to a parallelogram mechanism, and the length between each hinge point can be adjusted as needed so that the fourth frame 9 can reach the required position in each state of the bed frame.

As a preferred embodiment, the linear drive device 5 is an electric push rod, which is connected between the second frame 3 and the base 1. Specifically, referring to FIG5 , the second frame 3 includes a first crossbar 30 and two side bars 31 connected to the first crossbar 30 on both sides, the base 1 includes a second crossbar 12 arranged in parallel with the first crossbar 30, and the linear drive device 5 includes a body 50 and a telescopic rod 51 connected to the body 50, the telescopic rod 51 can perform telescopic movement relative to the body 50, the bottom of the body 50 is hinged to the second crossbar 12, and the end of the telescopic rod 51 is hinged to the first crossbar 30. When the telescopic rod 51 is extended, it can drive the second frame 3 to tilt up and gradually increase the distance between it and the first frame 2. Since the second frame 3 needs to bear the back and needs to tilt up at a larger angle, therefore, the linear drive device 5 is arranged between the second frame 3 and the base 1, which can more directly promote the movement of the second frame 3 and work more reliably.

It is understandable that, since the bed frame can be deformed as a whole under the drive of the linkage mechanism, when the bed frame is in use, its base 1 can be directly placed on a fixed object such as a bed board or the ground, without being fixed to the fixed object. On the one hand, its installation is more convenient, and on the other hand, even if there are people or objects between the second frame 3, the third frame 4, and the fourth frame 9 and the fixed object, the bed frame will not pinch people or objects during the deformation process, and the safety is higher. Of course, in order to make the bed frame more stable as a whole, the base 1 can also be fixedly connected to a fixed object.

As a preferred embodiment, referring to FIG. 2 , in the first state, the second frame 3 is spaced apart from the base 1 in the height direction, and most of it is suspended outside the base 1, and only a part is arranged opposite to the base 1. Preferably, the length L1 of the part of the second frame 3 arranged opposite to the base 1 ranges from 8 cm to 15 cm, and more preferably 11.5 cm. Since the second frame 3 is arranged roughly parallel to the base 1 in the first state, and most of the second frame 3 is located outside the base 1, a shear structure will not be formed between the second frame 3 and the base 1. When the second frame 3 is laid flat, it is not easy to clamp and injure people or objects between it and the base 1, which is safer. In particular, when the bed frame is wrapped with a flexible material to form a mattress, fingers will not enter between the part of the second frame 3 and the base 1 that is arranged opposite to each other, which is safer.

As a preferred embodiment, the number of linkage mechanisms is two or more groups, which are arranged at intervals along the width direction of the bed frame to provide stronger support performance. The linkage mechanisms shown in the drawings of this application are two groups, and are symmetrically arranged on both sides of the bed frame. It can be understood that the number of linkage mechanisms can also be one group if the strength and rigidity allow.

As a preferred embodiment, a gas spring is arranged between the first frame 2 and the fourth frame 9 or between the base 1 and the fourth frame 9. The two ends of the gas spring are respectively hinged to the first frame 2 (or the base 1) and the fourth frame 9, which can play a role of buffering and supporting during the movement of the fourth frame 9, thereby making the overall movement of the bed frame smoother during deformation and more comfortable to use.

It can be understood that the specific shapes and structures of the first frame 2, the second frame 3 and the fourth frame 9 are not limited. For example, each frame can include two side rods 31 located on both sides. To increase the strength, a reinforcing rod similar to the above-mentioned first cross rod 30 can be connected between the two side rods 31 of each frame, or a support plate can be connected to the surface of the two side rods 31, which can enhance the strength and rigidity while making it easier to support the human body.

The utility model also proposes a mattress, which includes the bed frame described above, and the mattress also includes a flexible material covering the outside of the bed frame and/or a flexible pad arranged on the surface of the bed frame, so that a person lying on the mattress is more comfortable. The flexible material is elastic and can be deformed accordingly when the bed frame is deformed.

The utility model also provides an electric bed, which comprises the bed frame or mattress mentioned above.

Furthermore, the electric bed also includes a bed board, and the bed frame or mattress can be directly placed on the bed board without being fixedly connected to the bed board, or the bed frame or mattress is fixed to the bed board through the base 1.

The above are only specific implementations of the present invention, and any improvements made based on the concept of the present invention are considered to be within the protection scope of the present invention.

Claims (14)

1. A bed frame, comprising:

A base (1);

The first frame (2) is used for supporting the buttocks of a human body, and the first frame (2) is movably connected with the base (1);

the second frame (3) is used for supporting the back of a human body, and the second frame (3) is movably connected with the first end (2 a) of the first frame (2);

The third frame (4) is used for supporting the thigh of the human body, and the third frame (4) is movably connected with the second end (2 b) of the first frame (2); and

A fourth frame (9) for supporting the lower leg of the human body, wherein one end of the fourth frame (9) is hinged with the third frame (4), and the other end is suspended;

The bed frame has a first state suitable for a person to lie on and a second state suitable for a person to sit on, the first frame (2) and the third frame (4) having a lower tilt angle in the first state than in the second state, and in the second state the second end (2 b) of the first frame (2) is tilted;

The bed frame further comprises a linkage mechanism, the linkage mechanism comprises a first connecting rod (60), the first connecting rod (60) is hinged with the base (1) and the first end (2 a) of the first frame (2), and the first frame (2) comprises a connecting shaft (21) movably connected with the base (1);

When the bed frame is switched from the first state to the second state, the connecting shaft (21) moves towards the side where the second frame (3) is located along the arc track, the distance between the connecting shaft and the bottom surface (11) of the base (1) is firstly reduced and then increased in the moving process, the first connecting rod (60) swings towards the direction where the second frame (3) is located, and the distance between the first end (2 a) and the bottom surface (11) of the base (1) is gradually reduced.

2. The bedframe as in claim 1, characterized in that the distance between the first frame (2) and the second frame (3) gradually increases during the switching of the bedframe from the first state to the second state.

3. The bed frame according to claim 1, characterized in that the first frame (2) is provided with an extension plate portion (20) extending towards the base (1);

The linkage mechanism comprises a second connecting rod (61), and the second connecting rod (61) is hinged with the extension plate part (20) and the base (1); or alternatively

The base (1) is provided with an arc-shaped hole (10), the connecting shaft (21) is arranged on the extension plate portion (20) and penetrates through the arc-shaped hole (10), and the arc-shaped hole (10) limits the connecting shaft (21) to move along the central line (100) of the arc-shaped hole (10).

4. The bed frame according to claim 1, characterized in that the linkage comprises a third link (70) hinged to the second frame (3) and the base (1), a fourth link (71) hinged to the first link (60) and the third link (70), and a fifth link (72) hinged to the second frame (3) and the fourth link (71), respectively, the hinge point between the fourth link (71) and the first link (60) and the hinge point between the fourth link (71) and the fifth link (72) being located on both sides of the hinge point between the third link (70) and the fourth link (71), respectively.

5. The bed frame according to claim 4, characterized in that in a four-bar mechanism consisting of the third link (70), the fourth link (71), the first link (60) and the base (1), a distance D between a hinge point (70 c) of the third link (70) and the fourth link (71) and a hinge point (70 b) between the third link (70) and the base (1) is shortest, a distance E between a hinge point (70 b) between the third link (70) and the base (1) and a hinge point (60 a) of the first link (60) and the base (1) is longest, and a distance F between a hinge point (70 c) of the third link (70) and the fourth link (71) and a hinge point (71 a) of the first link (60) and a distance G between a hinge point (71) of the fourth link (71) and the first link (60) and a distance G between a and the base (60) and a distance G and a between a and the hinge point (60) and the distance G and the base (1) are great;

In a four-bar mechanism comprising the second frame (3), the third link (70), the fourth link (71) and the fifth link (72), a distance H between a hinge point (70 a) between the third link (70) and the second frame (3) and a hinge point (70 c) between the third link (70) and the fourth link (71) is shortest, a distance I between a hinge point (71 b) between the fourth link (71) and the fifth link (72) and a hinge point (72 a) between the fifth link (72) and the second frame (3) is longest, A distance J is arranged between a hinge point (72 a) of the fifth connecting rod (72) and the second frame (3) and a hinge point (70 a) between the third connecting rod (70) and the second frame (3), a distance K is arranged between a hinge point (71 b) of the fourth connecting rod (71) and the fifth connecting rod (72) and a hinge point (70 c) of the third connecting rod (70) and the fourth connecting rod (71), and the sum of the lengths of the distance H and the distance I is smaller than the sum of the lengths of the distance J and the distance K.

6. The bed frame according to claim 4, characterized in that the third frame (4) is hinged to the second end (2 b) of the first frame (2), the linkage comprises a sixth link (8) and a seventh link (80), the sixth link (8) being hinged to the base (1) and to the third frame (4), the seventh link (80) being located below the third frame (4) and being hinged to the first frame (2) and to the fourth frame (9).

7. The bed frame according to claim 6, characterized in that the angle between the sixth link (8) and the bottom surface (11) is 75-105 ° when the bed frame is in the third state.

8. The bedframe as in any of claims 1 to 7, further comprising a linear driving device (5) connected between the base (1) and the second frame (3), the linear driving device (5) being electric, hydraulic, pneumatic or manual;

The base (1), the first frame (2), the second frame (3), the third frame (4) and the fourth frame (9) are all movably connected with the linkage mechanism, and when one of the first frame (2), the second frame (3), the third frame (4) and the fourth frame (9) is driven to move, the other frames move under the driving of the linkage mechanism;

The bed frame further comprises a gas spring connected between the first frame (2) and the fourth frame (9) or between the base (1) and the fourth frame (9).

9. The bedframe of any of claims 1 to 7, further comprising a third state, said third state being a zero gravity mode, said bedframe passing through the first state, the third state and the second state in sequence as said first frame (2) is tilted;

The tilting angle of the second frame (3) in the third state is larger than the tilting angle of the second frame in the first state and smaller than the tilting angle of the second frame in the second state;

the tilting angle of the third frame (4) in the second state is smaller than that in the third state;

In the first state, upper surfaces of the first frame (2), the second frame (3), the third frame (4) and the fourth frame (9) are flush;

In the second state, the tilting angle of the second end (2 b) of the first frame (2) is 5-10 degrees, the tilting angle of the second frame (3) is 45-60 degrees, and the tilting angle of the third frame (4) is 15-25 degrees;

In the third state, the tilting angle of the first end (2 a) or the second end (2 b) of the first frame (2) is 0-3 degrees, the tilting angle of the second frame (3) is 20-35 degrees, and the tilting angle of the third frame (4) is 20-35 degrees.

10. The bed frame of claim 9 wherein the frame comprises a frame body,

In the first state, the upper surfaces of the first frame (2), the second frame (3), the third frame (4) and the fourth frame (9) are flush and in a horizontal state;

In the second state, the hinge point of the fourth frame (9) and the third frame (4) is lower than the suspension end (9 b) of the fourth frame (9);

In the third state, the hinge point of the fourth frame (9) and the third frame (4) is higher than the suspension end (9 b) of the fourth frame (9).

11. The bed frame according to any one of claims 1 to 7, characterized in that in the first state, the second frame (3) portion is disposed opposite to the base (1), the second frame (3) and the base (1) are spaced apart in the height direction, and the length of the portion where the second frame (3) and the base (1) are disposed opposite is in the range of 8cm to 15cm.

12. The bed frame according to any one of claims 1 to 7, wherein the bed frame, in use, is placed on an external fixture and is not fixedly connected to the fixture; or when the bed frame is used, the base (1) is fixedly connected with an external fixture.

13. Mattress, characterized in that it comprises a frame according to any of claims 1 to 12.

14. An electric bed comprising a bed frame according to any one of claims 1 to 12 or a mattress according to claim 13.