Adjustable Bed Base

This present application claims the priorities of Chinese Patent Application No. 202421437472.9 filed to China National Intellectual Property Administration on Jun. 21, 2024, Chinese Patent Application No. 202421437461.0 filed to China National Intellectual Property Administration on Jun. 21, 2024, and Chinese Patent Application No. 202421437706.X filed to China National Intellectual Property Administration on Jun. 21, 2024, Chinese Patent Application No. 202410806510.1 filed to China National Intellectual Property Administration on Jun. 21, 2024, which are hereby incorporated by reference in their entireties.

The present application relates to the field of bed, in particular, to an adjustable bed base.

As people's quality of life improves, the functional requirements for beds are getting higher and higher. For example, before going to sleep, people generally hope to read, watch TV or use their mobile phones in a semi-reclining or sitting position. In order to offer a more comfortable support for such positions, some adjustable bed bases are designed to have a back board which can rotate upward and impart motion to a leg board to make it rotate as well.

There are many types of linkage structures of the back board and leg board of adjustable bed bases in the prior art, but they all have a common shortcoming: at the initial stage of the back board rotating upward from the angle of zero, a great force is required, such linkage structures directly impart the motion of the back board to the leg board to make it rotate, which also requires a great force. Therefore, in order to provide the double force required at the initial stage, such linkage structures have high requirements on the power of the linear actuator and the strength of its related structures, which greatly increases the cost of the adjustable bed base. In addition, the simplicity and stability of the structure of the existing adjustable bed base still have space for improvement.

The present application provides an adjustable bed base, including:

In one embodiment, the delayed pull-push structure includes an elongated through hole arranged at the first end of the push-pull rod and a first shaft arranged at the second end of the first linkage element, the elongated through hole extends along a length direction of the push-pull rod, and the first shaft is slidably fitted in the elongated through hole.

In one embodiment, the preset angle is 5°-15°.

In one embodiment, the second linkage element includes a first end, a second end and a third end which are not arranged on a same straight line, the first end of the second linkage element is pivotally connected to a second end of the push-pull rod, the second end of the second linkage element is pivotally connected to the stationary bed frame, and the third end of the second linkage element is provided with a roller which is in a rolling cooperation with the leg board frame.

In one embodiment, the back board frame includes a back board frame longitudinal rod, and an end of the back board frame longitudinal rod is pivotally connected to the stationary bed frame; the first linkage element includes a bottom plate and two side plates, the two side plates are respectively connected to two sides of the bottom plate, the bottom plate is fixed to the back board frame longitudinal rod, and two ends of the first shaft are rotatably connected to the two side plates, and the first shaft passes through the elongated through hole and slidably fitted in the elongated through hole.

In one embodiment, the adjustable bed base further includes a second linkage element supporting member, wherein the second linkage element supporting member is disposed on the stationary bed frame, and the second end of the second linkage element is pivotally connected to the second linkage element supporting member by a second shaft.

In one embodiment, the stationary bed frame includes a middle cross rod, a linear actuator installation base is detachably and pivotally connected to the middle cross rod, and the linear actuator is pivotally connected to the linear actuator installation base.

In one embodiment, the leg board frame includes a thigh board frame longitudinal rod and a calf board frame longitudinal rod, a thigh board frame is arranged on the thigh board frame longitudinal rod, a calf board frame is arranged on the calf board frame longitudinal rod, the thigh board frame longitudinal rod and the calf board frame longitudinal rod are pivotally connected to each other, an end of the thigh board frame longitudinal rod, which is closer to the back board frame, is pivotally connected to the stationary bed frame, and an end of the calf board frame longitudinal rod, which is further away from the back board frame, is pivotally connected to the stationary bed frame through a first connecting rod, and the roller is in rolling cooperation with a bottom surface of the thigh board frame longitudinal rod.

In one embodiment, the adjustable bed base includes two linkage mechanisms symmetrically arranged on two sides of the linear actuator, and each linkage mechanism includes one back board frame longitudinal rod, one pull-push rod assembly, one thigh board frame longitudinal rod, one calf board frame longitudinal rod, and one first connecting rod.

In one embodiment, the stationary bed frame includes two stationary bed frame longitudinal rods and two stationary bed frame transverse rods, the two stationary bed frame longitudinal rods and the two stationary bed frame transverse rods are alternatively connected to each other to form a rectangular frame by four piled connecting assemblies.

In one embodiment, each piled connecting assembly includes one corner bed leg, one first connecting element and one second connecting element; the first connecting element is fixed to one end of one stationary bed frame longitudinal rod, the second connecting element is fixed to one end of one stationary bed frame transverse rod, one first connecting element, one second connecting element, which are piled, and one corner bed leg are connected by a first threaded fastener.

In one embodiment, the first threaded fastener is a vertical threaded fastener;

In one embodiment, the first connecting element includes a first groove opening upward, the second connecting element includes a second groove opening upward, the first connecting element and the second connecting element are piled when the first connecting element and the corresponding end of the stationary bed frame longitudinal rod are accommodated in the second groove; the vertical threaded fastener includes a first vertical bolt fixed to one corner bed leg and a first nut, the first vertical bolt passes through a bolt hole of a bottom plate of the second groove, a bolt hole of a bottom plate of the first groove and is screwed and fixed with the first nut; the horizontal threaded fastener includes a second horizontal bolt and a second nut, the second horizontal bolt passes through a bolt hole of a vertical plate of the second groove, which is close to the stationary bed frame longitudinal rod, and a bolt hole of the stationary bed frame longitudinal rod and is screwed and fixed with the second nut.

In one embodiment, the stationary bed frame further includes two middle bed legs, and the two middle bed legs are respectively arranged at midpoints of the two stationary bed frame longitudinal rods.

In one embodiment, a middle cross rod is disposed near the two middle bed legs, the middle cross rod is parallel to the two stationary bed frame transverse rods, and two ends of the middle cross rod are respectively fixed to the two stationary bed frame longitudinal rods.

In one embodiment, the back board frame includes a load-bearing cross rod and a back board frame longitudinal rod, the load-bearing cross rod is pivotally connected to a telescopic end of the linear actuator, a bottom end of the back board frame longitudinal rod is pivotally connected to the stationary bed frame, the back board frame longitudinal rod and the load-bearing cross rod are connected by a third threaded fastener; the adjustable bed base further includes a connecting reinforcing element, the connecting reinforcing element is arranged at an intersection between the back board frame longitudinal rod and the load-bearing cross rod, the connecting reinforcing element includes a first plate and a second plate connected to each other, the first plate is connected to the back board frame longitudinal rod, and the second plate is connected to the load-bearing cross rod.

In one embodiment, the second plate is fitted and attached to the load-bearing cross rod.

In one embodiment, an open side groove is disposed on the first plate, and the first plate is connected to the back board frame longitudinal rod by a pin that passes through both the open side groove and the back board frame longitudinal rod.

In one embodiment, two back board frame longitudinal rods, which are connected to the load-bearing cross rod by two third threaded fasteners, are symmetrically arranged on two sides of the linear actuator, and two connecting reinforcing elements are respectively arranged at two intersections between the two back frame longitudinal rods and the load-bearing cross rod.

Some of the additional aspects and advantages of the present application will be explained in the following description, which can become apparent from the following description or be understood through practice of the present application.

To make the present application clearer and more understandable, detailed descriptions of specific embodiments will be provided below. Clearly, the described embodiments are part of the embodiments of the present application, not all of them. Based on the described embodiments of the present application, all other embodiments that can be obtained by those skilled in the art without inventive effort fall within the scope of the present application.

It should be noted that the drawings provided in the present application are merely illustrative examples of a basic concept of the present application. Therefore, only components relevant to the present application are shown in the drawings, which may be different in number, shape, size and scale in the actual implementation. The actual implementation can involve arbitrary modifications to the number, shape, size and scale of each component, and the arrangements of components may also be more complex. The structures, scales, and sizes illustrated in the drawings are intended to assist those in the art in understanding and reading the content of this specification and are not intended to define the conditions under which the present application can be implemented. Thus, they do not have substantial technical significance. Any modifications to the structure, changes in proportional relationships, or adjustments in size that do not affect the effects and objectives of the present application should still fall within the scope of the technical solutions disclosed by the present application. Additionally, terms such as “left”, “right”, “middle” cited in this specification are for the sake of clarity and are not intended to define the scope of what can be implemented by this application. Changes or adjustments in their relative positions, as long as they do not substantially alter the technical solutions, should also be considered within the scope of what can be implemented by the present application.

As shown in, the present application provides an adjustable bed base including a back board frame, a leg board frameand a linear actuator. The back board frameis pivotally connected to a stationary bed frame, and a back board is arranged on the back board frame. The leg board frameis pivotally connected to the stationary bed frame, and a leg board is arranged on the leg board frame. The linear actuatoris configured to drive the back board frameto rotate relative to the stationary bed frame, where an end of the linear actuatoris pivotally connected to the stationary bed frame, and another end of the linear actuatoris pivotally connected to the back board frame. The adjustable bed base of the present application further includes at least one of a pull-push rod assembly, a piled connecting assembly, and a connection reinforcing element.

As shown in, the back board framedrives the leg board frameto move through the pull-push rod assembly. The pull-push rod assembly includes a first linkage element, a pull-push rodand a second linkage element, a first end of the first linkage elementis connected to the back board frame, a second end of the first linkage elementis connected to a first end of the pull-push rodthrough a delayed pull-push structure. The delayed pull-push structure is configured to enable the first linkage elementto drive the pull-push rodto move after the back board framewhich is driven by the linear actuatorto rotate beyond a preset angle, and the second linkage elementrotates after being pulled or pushed by the pull-push rodto drive the leg board frameto move.

As shown in, the delayed pull-push structure includes an elongated through holearranged at the first end of the push-pull rodand a first shaftarranged at the second end of the first linkage element, the elongated through holeextends along a length direction of the push-pull rod, and the first shaftis slidably fitted in the elongated through hole. In some embodiments, the elongated through hole may exchange position with the first shaft, that is, the elongated through hole is arranged on the first linkage element and the first shaft is arranged on the push-pull rod.

At the initial stage of the back board framemoving from the angle of zero, the linear actuatordrives the back board frameand the back board to rotate upward, and the rotation of the back board framedrives the first shafton the first linkage elementto move in the elongated through holefrom the foot side of the bed to the head side of the adjustable bed base. During this period, the pull-push rodwill not be pulled by the first linkage blockand the second linkage elementconnected to the second end of the pull-push rodfails to lift the leg board frame. After the first shaftmoves to the end of the elongated through holecloser to the head side of the adjustable bed base, the linear actuatorcontinues to push the back board frameto drive the back board frameand the back board to rotate upward. During this period, the pull-push rodis pulled by the first linkage elementand then drives the second linkage elementconnected to the second end of the pull-push rodto lift the leg board frame, realizing the linkage between the back board and the leg board. That is to say, at the initial stage when the back board rotates upward from the angle of zero, the linear actuatoronly needs to provide the power to push the back board up, and after the back board is raised to the preset angle, it drives the leg board to rise together, which reduces the power requirement of the linear actuator, and also reduces the strength requirements and rigidity requirements of the pull-push rod, the back board frameand the leg board frame. Therefore, the cost of the linear actuatorand the cost of structures of the adjustable bed base such as the pull-push rod, the back board frameand the leg board framecan be saved. In addition, compared with the prior art, the linear actuatordirectly pushes the back board frame, which is then in movement impartation with the leg board framethrough the pull-push rod assembly, making the structure of the adjustable bed base simpler and more reliable.

In some embodiments, the preset angle can be any angle within a range of 5°-15°. Such a preset angle not only overcomes the defect of large initial lifting force requirement and increased cost, thereby relatively saving the cost of the adjustable bed base but also makes the technical effect of the leg board linkage relationship meet the actual use needs.

As shown in, the second linkage elementincludes a first end, a second end and a third end which are not arranged on a same straight line, the first end of the second linkage element is pivotally connected to a second end of the push-pull rod, the second end of the second linkage elementis pivotally connected to the stationary bed frame, and the third end of the second linkage elementis provided with a rollerwhich is in a rolling cooperation with the leg board frame. Specifically, the second linkage elementcan be an L-shaped block, a triangular block or other special-shaped blocks. The above arrangement makes the linkage relationship of the adjustable bed base simple, stable and reliable.

As shown in, the back board frameincludes a back board frame longitudinal rod, an end of the back board frame longitudinal rodis pivotally connected to the stationary bed frame; the first linkage elementincludes a bottom plate and two side plates, the two side plates are respectively connected to two sides of the bottom plate, the bottom plate is fixed to the back board frame longitudinal rod, and two ends of the first shaftare rotatably connected to the two side plates respectively, and the first shaftpasses through the elongated through holeand is slidably fitted in the elongated through hole.

As shown in, the adjustable bed base further includes a second linkage element supporting member. The second linkage element supporting memberis disposed on the stationary bed frame, and the second end of the second linkage elementis pivotally connected to the second linkage element supporting memberby a second shaft. Specifically, the second linkage block supporting membermay be a square tube, a round tube or a block of other suitable shape.

The stationary bed frameincludes a middle cross rod, and a linear actuator installation baseis detachably and pivotally connected to the middle cross rod. The linear actuatoris pivotally connected to the linear actuator installation base. Therefore, the linear actuator installation basecan be detached from the middle cross barduring transportation, which is convenient for storage and packaging, thereby making the overall packaging volume of the adjustable bed base smaller and more convenient.

As shown in, the leg board frame includes a thigh board frame longitudinal rodand a calf board frame longitudinal rod, a thigh board frame is arranged on the thigh board frame longitudinal rod, a calf board frame is arranged on the calf board frame longitudinal rod, the thigh board frame longitudinal rodand the calf board frame longitudinal rodare pivotally connected to each other, an end of the thigh board frame longitudinal rod, which is closer to the back board frame, is pivotally connected to the stationary bed frame, and an end of the calf board frame longitudinal rod, which is further away from the back board frame, is pivotally connected to the stationary bed framethrough a first connecting rod, and the rolleris in rolling cooperation with a bottom surface of the thigh board frame longitudinal rod.

After the back board framerotates beyond the preset angle, the linear actuatorcontinues to push up the back board frame, driving the backboard frameand the back board to rotate upward, and the pull-push rodis pulled by the first linkage element, and the pull-push roddrives the second linkage elementto rotate around its second end, and the roller(s)arranged at the third end of the second linkage elementmoves upward with the rotation, pushing the thigh board frame longitudinal rodto rotate around the pivot corresponding to the stationary bed frame, and the thigh board frame longitudinal rodthen drives the calf board frame longitudinal rodto rotate, so as to realize the lifting of the leg board frame.

The adjustable bed base includes two linkage mechanisms symmetrically arranged on two sides of the linear actuator. Each linkage mechanism includes one back board frame longitudinal rod, one pull-push rod assembly, one thigh board frame longitudinal rod, one calf board frame longitudinal rod, and one first connecting rod. The above arrangements make the symmetry, balance, stability and mechanical properties of the adjustable bed base better. Under the premise of relatively saving the cost of the adjustable bed base, the lifting movements or lowering movements of the back board and leg board is uniform, flexible, stable and reliable.

As shown in, the stationary bed frameincludes two stationary bed frame longitudinal rodsand two stationary bed frame transverse rods, the two stationary bed frame longitudinal rodsand the two stationary bed frame transverse rodsare alternatively connected to each other to form a rectangular frame by four piled connecting assemblies.

Each piled connecting assemblyincludes one corner bed leg, one first connecting elementand one second connecting element. The first connecting elementis fixed to one end of one stationary bed frame longitudinal rod, the second connecting elementis fixed to one end of one stationary bed frame transverse rod, one first connecting element, one second connecting element, which are piled, and one corner bed legare connected by a first threaded fastener.

Since the first connection elementis disposed on the frame longitudinal rodand the second connection elementis disposed on the frame transverse rod, it is only necessary to use the first threaded fastener to screw the first connection element, the second connection elementand the four corner bed legs, so the connection structure has relatively few parts, and the disassembly and assembly are relatively simple and convenient. In addition, since the first connection elementand the second connection elementare piled, the contact area is relatively larger, and the connection stability will be relatively better.

As shown in, the first threaded fastener is a vertical threaded fastener. The second connecting element is connected to the stationary bed frame longitudinal rod by a horizontal threaded fastener, or the first connecting element is connected to the stationary bed frame transverse rod by a horizontal threaded fastener. Such arrangements allow the connection to be firmly limited in both vertical and horizontal directions, with better integrity, and the connection is more firm, stable and reliable.

The first connecting elementincludes a first groove opening upward, the second connecting elementincludes a second groove opening upward. The first connecting element and the second connecting element are piled when the first connecting element and the corresponding end of one stationary bed frame longitudinal rodare accommodated in the second groove. The vertical threaded fastener includes a first vertical boltfixed to one corner bed legand a first nut, the first vertical boltpasses through a bolt hole of a bottom plateof the second groove, a bolt hole in a bottom plateof the first groove and is screwed and fixed with the first nut. The horizontal threaded fastener includes a second horizontal boltand a second nut, the second horizontal boltpasses through a bolt hole of a vertical plateof the second groove, which is close to the stationary bed frame longitudinal rod, and a bolt hole of the stationary bed frame longitudinal rodand is screwed and fixed with the second nut. The above arrangements allow the stationary bed frame longitudinal rod, the stationary bed frame transverse rodand the corner bed legsto have a larger contact area when connected, making the connection firmer, more stable and more reliable. The vertical threaded fastener is fixed to the corner bed leg to further reduce the number of separate parts; thus the modular characteristics are more obvious, and the disassembly and assembly are simpler and more convenient.

As shown in, the stationary bed framefurther includes two middle bed legs, and the two middle bed legsare respectively arranged at midpoints of the two stationary bed frame longitudinal rods. After adopting the above structure, the stationary bed frameof the adjustable bed base can be longer with stability. That is, as the length of the adjustable bed base increases, the support of the stationary bed frame will be stronger, and the mechanical properties of the whole bed will be better with the two middle bed legssupporting the middle of the adjustable bed base.

In some embodiments, a middle cross rodis disposed near the two middle bed legs, the middle cross rodis parallel to the two stationary bed frame transverse rods, and two ends of the middle cross rodare respectively fixed to the two stationary bed frame longitudinal rods. Specifically, each middle bed legis connected to a third connecting elementfixed to the stationary bed frame longitudinal barthrough a third threaded fastener, thus the middle bed legcan be connected to the stationary bed frame longitudinal bar. The two ends of the middle cross rodare fixed with two fourth connecting elements, and the fourth connecting elementsare respectively connected to the two stationary bed frame longitudinal rodsthrough the two fourth threaded fasteners respectively.

Such arrangements not only strengthen the support of the adjustable bed base from the two middle bed legs in the middle of the stationary bed frame length but also makes the connection structure more stable. In addition, the connection between the middle cross rod and the stationary bed frame longitudinal rods and the connection between the stationary bed frame longitudinal rods and the middle bed legs are divided into separate connection structures, which can also leave installation space for the electric drive arranged in the middle of the stationary bed frame.

In some embodiments, as shown in, the back board frameincludes a load-bearing cross rodand a back board frame longitudinal rod, the load-bearing cross rodis pivotally connected to a telescopic end of the linear actuator, a bottom end of the back board frame longitudinal rodis pivotally connected to the stationary bed frame, the back board frame longitudinal rodand the load-bearing cross rodare connected by a third threaded fastener. The adjustable bed base further includes a connecting reinforcing element, the connecting reinforcing elementis arranged at an intersection between the back board frame longitudinal rodand the load-bearing cross rod. The connecting reinforcing elementincludes a first plateand a second plateconnected to each other, the first plateis connected to the back board frame longitudinal rod, and the second plateis connected to the load-bearing cross rod.

Since the connecting reinforcing elementis arranged at an intersection between the back board frame longitudinal rodand the load-bearing cross rod, during the process in which the linear actuatordrives the load-bearing cross rodand the load-bearing cross roddrives the back board frame longitudinal rodto rotate, most of the load impartation can be borne by the connecting reinforcing elementat the intersection of the load-bearing cross rodand the back panel frame longitudinal rod, and the third threaded fastenerplays a role almost only in fixing the load-bearing cross rodand the back board frame longitudinal rodas a whole. In this way, the load-bearing cross rodand the back board frame longitudinal rodat the intersection will not be easily deformed, and a possible gap between the load-bearing cross rodand the back board frame longitudinal rodat the intersection will not be formed easily, and the rotation process of the back board framewill not generate noise easily. At the same time, the firmness, stability and mechanical properties of the connection at the intersection, i.e. the connection, between the load-bearing cross rodand the back board frame longitudinal rodare greatly improved.

As shown in, the second plateis fitted and attached to the load-bearing cross rod. Specifically, the load-bearing cross baris adapted to the shape of the second plate. The load-bearing cross barcan be a rectangular tube, and the second plateshould be a flat plate to fit with the load-bearing cross bar; or the load-bearing cross barcan also be a circular tube, and the second plateshould be a plate with an arc to fit the load-bearing cross bar. The second plateis fitted and fixedly connected to the load-bearing cross bar, which can make the load-bearing area larger and less prone to deformation. The attachment method can be multi-point welding, multi-point screw connection, etc.

As shown in, an open side grooveis disposed on the first plate, and the first plateis connected to the back board frame longitudinal rodby a pivotthat passes through both the open side grooveand the back board frame longitudinal rod. The above arrangements allow the back board frame longitudinal rodto be detachable from the load-bearing cross bar, which is convenient for storage and transportation.