FIELD OF THE INVENTION

The invention generally relates to a bed, and more particular to adjustable bed systems with power-driven lifting assemblies.

BACKGROUND OF THE INVENTION

Sleep is critical for people in every aspect of their lives. Beds are necessary furniture for people to sleep on. A conventional bed usually has a fixed size, such as a king size, a queen size or a full size, which cannot be changed, without body positions adjustable, and also requires professionals to install. Thus, it is beneficial and desirable for people to have a bed system that is capable of adjusting body positions based on user's sleep preference so that the user achieves maximum comfort during sleep. In addition, it is also beneficial and desirable that the bed system can be easily assembled to improve assembly efficiency and increase the user's assembly experience. It is further beneficial and desirable that the size of the bed system can be changeable from one size to another size.

SUMMARY OF THE INVENTION

In one aspect, the invention relates to an adjustable bed system with power-driven lifting assemblies.

In one embodiment, the adjustable bed system includes a pair of side rails transversely spaced, longitudinally aligned and arranged parallel to each other; and a pair of lifting assemblies attached respectively to the pair of side rails for operably adjusting positions of at least one part of a bed. Each lifting assembly comprises a back lifting arm and a leg lifting mechanism; a bracket; and a back lifting actuator and a leg lifting actuator received in the bracket. Each of the back and leg lifting actuators comprises an activation member and a motor member engaged with the activation member for driving the activation member. The activation member of the back lifting actuator is engaged with the back lifting arm for operably adjusting the back lifting arm at desired back positions. The activation member of the leg lifting actuator is engaged to the leg lifting mechanism for operably adjusting the leg lifting mechanism at desired leg positions.

In one embodiment, the adjustable bed system further includes an upper rail and a lower rail being longitudinally spaced and transversely aligned, two ends of the upper rail being detachably connected to the first ends of the pair of side rails and two ends of lower rail being detachably connected to the second ends of the pair of side rails such that the upper rail and the lower rail are parallel to each other, where each of the upper rail and the lower rail has a length L that is adjustable or fixed and defines a size of the bed.

In one embodiment, the activation member comprises a driving shaft having a first portion and a second portion extending from the first portion, the second portion being engaged with the motor member. The activation member of the back lifting actuator is engaged with the back lifting arm through engaging the first portion of the driving shaft with one end portion of the back lifting arm. The activation member of the leg lifting actuator is engaged with the leg lifting mechanism through engaging the first portion of the driving shaft with one end portion of the leg lifting mechanism.

In one embodiment, the driving shaft further has at least one claw protruded from the second portion such that the second portion is engaged with the motor member through the at least one claw.

In one embodiment, the activation member further comprises a shoulder mounted on the first portion of the driving shaft for engaging the first portion of the driving shaft with said one end portion of the back lifting arm or the leg lifting mechanism.

In one embodiment, the motor member comprises a body having an opening formed at one end portion and a motor mounted on the body. The opening is configured for receiving the second portion of the driving shaft of the activation member so as to engage the motor member with the activation member.

In one embodiment, the bracket comprises a base member attached to a respective one of the pair of side rails, a pair of tab members vertically attached to the base member, and a pair of bars transversely attached to top portions of the pair of tab members.

In one embodiment, one of the pair of tab members is attached to the base member and the other of the pair of tab members is attached to the respective side rail such that the pair of tab members is transversely spaced, longitudinally aligned and parallel to each other. The pair of bars is longitudinally spaced and transversely aligned and parallel to each other. Each tab member has two connecting holes defined at two end portions of said tab member, and the pair of bars is positioned between the connecting holes of the pair of tab members.

In one embodiment, each tab member comprises a single tab or a plurality of tabs.

In one embodiment, as assembled, the driving shaft of the activation member is rotatably connected to the pair of tab member through respective connecting holes and a groove formed in another end portion of the body of the motor member receives a respective one of the pair of bars, so that the back lifting actuator and the leg lifting actuator securely attached to the bracket.

In one embodiment, the leg lifting mechanism comprises first, second, third and fourth supporting members, where a first end of the first supporting member is connected to the first portion of the driving shaft of the leg lifting actuator, first ends of the second and third supporting members are connected to a second end of the first supporting member, a first end of the fourth supporting member is connected to a second end of the third supporting member.

In one embodiment, the leg lifting mechanism further comprises an elastic member connected between the second end of the second supporting member and a position of the third supporting member.

In one embodiment, the adjustable bed system further includes a plurality of platforms disposed on the pair of lifting assemblies and coupled with the back lifting arm and the leg lifting mechanism such that positions of at least one or more of the plurality of platforms are adjustable in accordance with operations of the back lifting arm and the leg lifting mechanism.

In one embodiment, the plurality of platforms comprises a seat platform mounted on tops of the brackets of the lifting assemblies; at least one back platform coupled with the back lifting arm, such that the at least one back platform is operably rotatable around its lower edge in a back platform downward rotating direction or a back platform upward rotating direction; and a thigh platform and a leg platform coupled to the leg lifting mechanism, such that the thigh platform is rotatable around its upper edge in a thigh platform downward rotating direction or a thigh platform upward rotating direction, and the leg platform is rotatable around its upper edge in a leg platform downward rotating direction or a leg platform upward rotating direction.

In one embodiment, the adjustable bed system further includes a controller configured to control operations of the back lifting actuator and the leg lifting actuator of each lifting assembly, so as to lift individually or cooperatively the back lifting arm and the leg lifting mechanism in desired positions, thereby adjusting the back platform, the thigh platform, and the leg platform in the desired positions.

These and other aspects of the invention will become apparent from the following description of the preferred embodiment taken in conjunction with the following drawings, although variations and modifications therein may be affected without departing from the spirit and scope of the novel concepts of the disclosure.

