Abstract: A knockdown bed is formed of a first bed frame and a second bed frame. The first bed frame includes a top side, a bottom side, and an insertion member. The insertion member has an insertion end, a fixed end connected with the bottom side, two lateral sides, and two abutment surfaces connected with the two lateral sides. The two abutment surfaces gradually approach each other from the fixed end to the insertion end. The second bed frame includes a top side, a bottom side, and a slot member adjacent to the first bed frame. The slot member is formed of two sidewalls, two abutment walls connected with the two sidewalls, and a slot, into which the insertion member can be inserted to interconnect the first and second bed frames. In this way, the knockdown bed can be easily assembled and structurally firm.

Abstract: A synchronous loudspeaking system comprises a first Bluetooth receiver, a first processor, a first speaker, a second Bluetooth receiver, a second processor and a second speaker. The first Bluetooth receiver receives a first signal. The first processor electrically connects to the first Bluetooth receiver. The first speaker has a first input terminal electrically connected to the first processor, and a first output terminal. The second Bluetooth receiver optionally receives a second signal. The second processor electrically connects to the second Bluetooth receiver. The second speaker has a second input terminal electrically connected to the second processor and optionally connected to the first output terminal, and a second output terminal. The two speakers sound synchronously when the second input terminal and the first output terminal is electrically connected.

Abstract: A stereophonic device for a bed disposed adjacent to at least a wave reflecting object is provided. The bed has an upper side and a lower side. The stereophonic device includes a loudspeaker disposed on the lower side of the bed. The loudspeaker is adapted to generate direct sound waves radially propagating therefrom. A part of the direct sound waves propagate through the bed toward the upper side of the bed, and another part of the direct sound waves propagate toward the wave reflecting object, reflected by the wave reflecting object and becoming a reflected sound waves. The reflected sound waves then propagate toward the upper side of the bed and demonstrate stereophonic sound along with the direct sound waves propagating theretoward.

Abstract: An electric bed is formed of a bedstead having an immovable base and a movable base pivotably connected with the immovable base, a drive mounted to the bedstead for driving the movable base to pivot relative to the immovable base, and an air bag mounted to the first or second surface and provided with a hole and a sounder mounted into the hole. The immovable base has a first surface facing the movable base. The movable base has a second surface facing the immovable base. The movable base is pivotable between a lying position and an uplift position relative to the immovable base. If a foreign object or the user's body is jammed between the immovable base and the movable base, the air bag will be squeezed to make the sounder sound for warning.

Abstract: A knockdown bed is formed of a first bed frame and a second bed frame. The first bed frame includes a top side, a bottom side, and an insertion member. The insertion member has an insertion end, a fixed end connected with the bottom side, two lateral sides, and two abutment surfaces connected with the two lateral sides. The two abutment surfaces gradually approach each other from the fixed end to the insertion end. The second bed frame includes a top side, a bottom side, and a slot member adjacent to the first bed frame. The slot member is formed of two sidewalls, two abutment walls connected with the two sidewalls, and a slot, into which the insertion member can be inserted to interconnect the first and second bed frames. In this way, the knockdown bed can be easily assembled and structurally firm.

Abstract: The present invention provides an air massage device for a bed. The air massage device includes at least one air wave generator disposed on the bed. The air wave generator includes a shell, a permanent magnet disposed in the shell, a coil electromagnet movably disposed in the shell and a membrane attached to the coil electromagnet. When the coil electromagnet is powered by an alternating current, the coil electromagnet moves reciprocatingly relative to the permanent magnet along with the membrane so that the membrane generates an air wave which is adapted to massage people on the bed.

Abstract: An electric folding bed includes a base having a load-bearing element for supporting hips of a user and at least a track extending along a head-to-foot axis of the bed, a telescopic actuator having a body pivotally attached to the base and a telescoping element linearly moveable relative to the body along the head-to-foot axis substantially, a connecting unit pivotally connected with the telescoping element, a backboard fastened to the connecting unit for the user to lean thereon, at least a supporting element pivotally attached to the base and the connecting unit, and at least a moving element disposed to the track and pivotally attached to the connecting unit. The telescoping element drives the connecting unit and the backboard to swing up and displace away from the load-bearing element. Therefore, the electric folding bed can avoid user's uncomfort and injury when the user sits up.

Abstract: A voice-controlled vibration electric bed includes a bed base formed of a base support frame and movable frames, a power supply unit mounted at the bed base, a driver electrically connected to the power supply unit for driving the movable frames to move relative to the base support frame, a microcomputer-based control device electrically connected to the power supply unit and the driver, microphones installed in the bed base and electrically connected to the microcomputer, and a vibration device installed in the bed base and electrically connected to the power supply unit and also electrically connected to the control device either directly or indirectly such that the microcomputer matches the sound picked up by the microphones with a predetermined frequency range and controls the vibration device to vibrate subject to the matching result.