Abstract: A patient support system comprises a patient support apparatus for patients. The patient support apparatus comprises a base and a patient support surface supported by the base. The patient support apparatus also comprises powered devices that perform one or more predetermined functions on the patient support apparatus. Multiple input devices are employed to control the powered devices. The input devices are designed to enable caregivers to cause operation of the powered devices, as needed, while freeing the caregivers to perform other tasks.

Abstract: A patient transport apparatus comprises a support structure. The support structure comprises a base, a frame, and a patient support surface to support a patient. One or more handle assemblies are coupled to the frame to maneuver the patient transport apparatus. The handle assemblies comprise one or more handles to be manipulated by a user. The handles are capable of being adjusted to facilitate maneuvering of the patient transport apparatus, such as pushing/pulling the patient transport apparatus along a floor surface, lifting the patient transport apparatus over obstacles, loading the patient transport apparatus into an emergency vehicle, and/or unloading the patient transport apparatus from the emergency vehicle.

Abstract: A tipping chair (10) includes a main strut (12),a pivot seat (34) on the main strut (12), a pivot slot (18) defined the main strut (12) and a pivot strut (24) pivotally secured within the pivot slot (18). Pivoting a prop end (28) of the pivot strut (24) out of the pivot slot (18) of the main strut (12) backward toward a bottom end (14)of the main strut (12) causes a seat end (26) of the pivot strut (24) to raise the pivot seat(34) , and the seat end (26) becomes secured to a latch (42) on a brace surface (40) opposed to a seating surface (38) of the pivot seat (34) to postion the chair (10) in a seated.configuration. Reversing the process returns the chair (10) to a flat, stored configuration to be optionally stored as wall art.

Abstract: A platform bed frame includes two frame segments connected by hinge connections, leg assemblies connected to the two frame segments, a rotating hook member pivotally secured to one of the frame segments; and a securing extension attached to the other frame segment, and the rotating hook and extension allow two bed frames to be secured together. Alternately, the frame may include an extension and T-slot to connect two frames. A related improvement is a suspension leg including telescoping sections and a compressible, resilient member controlling movement of the telescoping sections. Another related improvement relates to a frame structure with connected angled supports and slats connected thereto to form the mattress supporting surface.

Abstract: A modular pallet system includes a lower shelf having vertically linkable corner fittings connected to side bars and cross bars arranged in a substantially horizontal plane. The pallet system further includes a plurality of uprights connected to the vertically linkable corner fittings and extending upwards from the lower shelf. At least two of the uprights may be connected together by a horizontal handle spaced apart from the lower shelf. Additionally, the pallet system includes castors connected to vertically linkable corner fittings of the lower shelf and extending downward from the lower shelf.

Abstract: The present invention relates to an apparatus, such as a bed, having a vertically adjustable deck that is selectably raised and lowered in a substantially vertical manner. Two leg frames are pivotally and movably connected to rails supporting the deck through a slot in the bottom of the rails. Support frames having a fixed longitudinal position relative the bed frame rail are connected to a central pivot point of the leg frames, respectively. The support frames each have a cross member supporting a connection lever defining a path. Actuators are pivotally connected to the bed frame and to a movable pivotal connection point along the path. A control arm is provided to determine the location of the actuator end relative the path of the connection lever. Wheel assemblies can be pivotally connected to the second end of the leg frames.

Abstract: An adjustable foldable bed frame comprises an outer assembly having a body section and a leg section. Each section has a substantially rectangular periphery with an opening and is pivotally coupled together by a pair of first coupling members for movement between an open configuration whereby the sections are co-planar, and a closed configuration whereby the sections are parallel with each other. An inner assembly having a body component and a leg component are positioned within the opening of the body section and the leg section, respectively. The body component comprises a torso portion which is independently adjustable from a flat configuration to a plurality of reclined configurations. The leg component comprises a calf portion which is independently adjustable from a flat configuration to a plurality of elevated configurations. A connecting bracket assembly fixedly couples adjacent adjustable foldable bed frames such that adjacent torso and calf portions are adjustable together.

Abstract: A folding, lightweight, portable, and rugged surgical operating platform apparatus that can be erected quickly under adverse conditions at any location and without tools other than the users hands and without the need to attach any loose pieces to form the unitary platform. As needed, the surgical platform will hold, support, elevate, move, and tilt a stretcher (or litter in military terms) bearing a wounded person and the portable surgical support equipment such as IV poles, surgical instrument trays, armboards, wrist restraints, leg stirrups, light poles, and other equipment that a surgeon needs to treat major injuries and save lives. In the folded position, the platform takes up limited, uniform space for ease of portability by a single individual. Different users have different applications and requirements for how the platform is supported using stationary supporting legs or wheels when rolling capability are required.

Abstract: The present invention relates to a surgical tables and table tops with reduced thickness and improved radiolucency of X-ray radiation. The invention also relates to surgical table arrangement adapted for the improved table tops.

Abstract: The present invention is a collapsible portable field hospital bed that can be transported to remote location and is durable enough to remain at the remote location for subsequent local use. The invention can include a frame having a horizontal support assembly including a proximal end and a distal end hingably connected so that the proximal end and the distal end can be moved from an operational position to a storage position; a vertical support assembly pivotally connected to an angled support assembly and said horizontal support assembly, said angled support assembly pivotally connected to said horizontal support assembly; a stabilizing assembly included in said frame having a first hinge member pivotally attached to a second hinge member, said stabilizing assembly biased in said operational position, said first hinge member cooperating with said second hinge member to prevent said angled support assembly from folding.

Abstract: Embodiments of a height adjustable emergency roll-in cot comprise a cot support frame comprising having a leading end, a trailing end, and a pair of opposing side frame members disposed between the leading and trailing ends, a pair of wheeled front legs slidingly coupled to the cot support frame via a slideable front transverse support member, and a pair of wheeled back legs slidingly coupled to the support frame via a slideable back transverse support member, wherein the slideable front transverse support member, the slideable back transverse support member, or both include a pair of locking pins (90, 92).

Abstract: A therapeutic treatment table comprises a frame and a treatment platform that is mounted on the frame and adapted to support at least a portion of the body of a patient. A preferred treatment table also includes an arm support section which is mounted on the frame. The arm support section comprises an arm support that is moveable by a patient on the table independently of the treatment platform.

Abstract: This invention is directed towards a patient single surface system, PS3, which is a next generation system solution for patient accommodation, diagnosis, treatment, transfer and transport. PS3 provides a single surface for the patient to remain on from the trauma site through diagnosis, treatment and convalescence. Needs addressed by the PS3 system include improved patient treatment through reduction in time to treatment, reduced or eliminated unnecessary patient movement and injury, as well as improved comfort throughout treatment and convalescence. In addition, the PS3 system solves significant economic considerations.

Abstract: A bed with a leg assembly coupled to a support link assembly by a joint, the joint comprising a slot having at least two paths. A support link assembly defining a length that automatically varies as the support link assembly moves relative to the leg assembly.

Abstract: A removable litter support assembly for installation on a interior wall of a transport vehicle. The removable litter support assembly includes a plurality of wall supports and a plurality of straps. Each of the plurality of wall supports are generally oriented vertical and parallel to each other and in a linear orientation and each of the plurality of straps are generally oriented vertical and parallel to each other and in a linear orientation. The linear orientation of the plurality of wall supports being parallel to the linear orientation of the plurality of straps.

Abstract: The present invention is a collapsible portable field hospital bed that can be transported to remote location and is durable enough to remain at the remote location for subsequent local use. The invention can include a frame having a horizontal support assembly including a proximal end and a distal end hingably connected so that the proximal end and the distal end can be moved from an operational position to a storage position; a vertical support assembly pivotally connected to an angled support assembly and said horizontal support assembly, said angled support assembly pivotally connected to said horizontal support assembly; a stabilizing assembly included in said frame having a first hinge member pivotally attached to a second hinge member, said stabilizing assembly biased in said operational position, said first hinge member cooperating with said second hinge member to prevent said angled support assembly from folding.

Abstract: The tactical stretcher and convertible first aid table with detachable IV pole includes a small and lightweight stretcher that is manually lifted with two sets of handles located at distal ends of the stretcher. The stretcher includes a plurality of straps to secure and immobilize a patient lying on the top surface of the stretcher. Two pairs of foldable legs rotate downwardly from a bottom surface to convert the stretcher to a first aid table. The foldable legs are limited to 90 degrees range of rotational movement from a horizontal position to a vertical position. An IV holder accessory is optionally provided, and secures itself to one of the handles. The IV holder includes a telescoping construction in order to adjust the elevation of an IV bag with respect to the stretcher.

Abstract: A person-support apparatus comprises a frame, a deck, and an upper body support assembly. The deck is coupled to the frame and configured to support a person. The deck includes a first section and a second section. The first section is configured to pivot between a first angular orientation and a second angular orientation with respect to the frame. The person is in a supine position when the first section is in the first angular orientation and is moved to a sitting position when the first section is moved to the second angular orientation. The upper body support assembly is movably coupled to the frame and includes a torso support. The torso support is configured to support a portion of the person's torso when the person is in a forward-leaning posture in the sitting position.

Abstract: A transport carriage for transport for transport of a patient support and/or an operating table column of an operating table includes a chassis which is connectable with the patient support and/or with the operating table column. The chassis includes a first longitudinal beam and a second longitudinal beam arranged at a distance thereto. The first and second longitudinal beams form a fork-shaped opening. At least one castor which is pivotable about a swiveling axis is arranged at each longitudinal beam forming the fork-shaped opening. The transport carriage includes at least one delimiting unit for delimiting the swiveling movement of at least one of the castors about its swiveling axis. This delimitation can be automatically revoked upon lifting the base of the operating table.

Abstract: A transport carriage for transport of a patient support and/or an operating table column of an operating table includes a chassis which is connectable with the patient support and/or with the operating table column of the operating table. The chassis includes a first longitudinal beam and a second longitudinal beam arranged at a distance thereto. The first and second longitudinal beams form a fork-shaped opening. At least one castor which is pivotable about a swiveling axis is arranged at the longitudinal beams. The transport carriage includes at least one delimiting unit for delimiting the swiveling movement of at least one of the castors about its swiveling axis. The delimiting unit in a disabled first operational state does not delimit the swiveling movement of the at least one castor. In an enabled second operational state, the delimiting unit does delimit the swiveling movement of the castor.

Abstract: A patient lifting apparatus is provided and which is operative to lift an injured person or patient from a lower area to an elevated position where the patient or injured person can be easily and safely transferred to a stretcher or other support device. The patient lifting apparatus includes a pair of side sections that are interconnectable. Each side section includes a lifting device and a lifting bar which is movable up and down. In a connected mode, the two side sections are connected together and the lifting bars include attachments for attaching to a patient support. Once attached to the patient support, the lifting bars via the lifting device are operative to lift the patient support upwardly generally between the two side sections where the patient can be transferred to a stretcher or other structure.

Abstract: An operating table has a movable base which is provided with four casters, wherein the casters are each pivotable via a pivot lever. The pivot levers are connected to one another by a common drive and a linkage.

Abstract: A limb support device that includes a vertical support, a base connected to a lower end of the vertical support and a head portion connected to an upper end of the vertical support. The base includes a set of foldable legs that can be positioned upward, where each leg is substantially parallel to the vertical support, or downward, where each leg is substantially perpendicular to the vertical support so that the vertical support is held upright. The head portion has a generally concave saddle that can hold a limb above the vertical support. The saddle can be pivoted so that it can be positioned at a variable angle with respect to the vertical support. The vertical support itself is adjustable in length.

Abstract: Embodiments of a power and signal distribution assembly for a bed having at least one power input port, at least one controller port, and at least one output port are described. The power input port receives a first DC voltage from a power supply and the power supply receiving an AC voltage and converting it to the first DC voltage. The controller port receives the first DC voltage and outputs at least one power control signal having the first DC voltage. The output port receives signals having the first DC voltage. The power and signal distribution assembly has a first location and the power supply has a second location different from the first location. In other embodiments, the power and signal distribution assembly is located on a frame of a bed and the power supply remote therefrom. Still further, one or more additional controller ports may also be provided.

Abstract: A massage and chiropractic table having a supporting frame and a surface supported on the frame, and having one or more comfort features, including a recess formed in the surface of the table for accommodating a person's anatomical configuration, such as a woman's breasts, a removable recess insert that may be removed and replaced to expose the recess as desired, a neck recess for facilitating supporting a user's neck in a comfortable position, and a head rest that is configured to reduce or eliminate pressure on a user's face when the user is lying face down on the table. The massage table may be foldable and may have a handle so that it may be readily stored and transported, or, according to other embodiments may be stationary.

Abstract: A trolley for transporting a patient includes a couch for the patient, an extendable and retractable component, and a coupling device on the extendable and retractable component for coupling the trolley to a medical apparatus. The couch and the extendable and retractable component are arranged such that extending or retracting the extendable and retractable component when the trolley is coupled to the medical apparatus (NMR) causes a relative movement of the couch with respect to the medical apparatus.

Abstract: A mobile treatment table including a central support. A first support member is pivotally connected with the central support and operable between a substantially vertical position and a substantially horizontal position. A second support member is pivotally connected with the central support and includes a handle integral therewith. The second support member is operable between a substantially vertical position and a substantially horizontal position. A wheel assembly is operably connected with the second support member and operable between an extended position adjacent a first side of the support member and a retracted position adjacent a second side of the support member.

Abstract: A body support assembly (326A) for supporting the body of a user of a massage device (10) includes a frame (334), a pad assembly (336) and a cover assembly (338). The pad assembly (336) is supported by the frame (334). The cover assembly (338) secures the pad assembly (336) to the frame (334). The cover assembly (338) includes a top cover section (360), a bottom cover section (362), and a section connector (364). The section connector (364) selectively moves between an open configuration and a closed configuration. When the section connector (364) is in the open configuration, the top cover section (360) is not directly connected to the bottom cover section (362). When the section connector (364) is in the closed configuration, the top cover section (360) is directly connected to the bottom cover section (362). The cover assembly (338) can further include a middle cover section (366) that is connected to the top cover section (360) and the bottom cover section (362).

Abstract: A patient lifting apparatus is provided and which is operative to lift an injured person or patient from a lower area to an elevated position where the patient or injured person can be easily and safely transferred to a stretcher or other support device. The patient lifting apparatus includes a pair of side sections that are interconnectable. Each side section includes a lifting device and a lifting bar which is movable up and down. In a connected mode, the two side sections are connected together and the lifting bars include attachments for attaching to a patient support. Once attached to the patient support, the lifting bars via the lifting device are operative to lift the patient support upwardly generally between the two side sections where the patient can be transferred to a stretcher or other structure.

Abstract: A mobile treatment table having a central support operably connected with a wheel assembly. A support member is pivotally connected with the central support and operable between a vertical position and a horizontal position. At least one support leg is disposed at a distal end of the support member and operable between a deployed position substantially orthogonal to the support member and a non-deployed position substantially parallel with the support member. A handle extends from a proximal end of the support member and forms a portion of the support member when the support member is in the horizontal position.

Abstract: A mobile treatment table including a central support. A first support member is pivotally connected with the central support and operable between a substantially vertical position and a substantially horizontal position. A second support member is pivotally connected with the central support and includes a handle integral therewith. The second support member is operable between a substantially vertical position and a substantially horizontal position. A wheel assembly is operably connected with the second support member and operable between an extended position adjacent a first side of the support member and a retracted position adjacent a second side of the support member.

Abstract: A foldable structure for a hospital bed contains two mounts, a bed frame, and a bed plane, each mount including two rotary positioning pieces, wherein each rotary positioning piece has a hole and an arcuate groove to axially connect the each rotary positioning piece with two coupling elements of the bed frame, such that the bed frame rotates relative to the two mounts, the each rotary positioning piece has two orifices corresponding to two ends of the arcuate groove so that a spring pin of each side of the bed frame is inserted into one of the two orifices of the each rotary positioning pieces, hence the spring pin is pushed out of the one of the two orifices of the each rotary positioning pieces, a coupling element in the arcuate groove rotates smoothly relative to a coupling element in the hole, thus retracting or expanding the bed frame easily.

Abstract: A steerable ultra-low patient bed that incorporates a means for maintaining verticality of the caster stem at all height positions of the bed and a means for selectively locking the caster assemblies of the bed in a desired locking position. The means for selectively locking the caster assemblies may be actuated from either end of the bed using a central actuation mechanism. The bed according to the present invention has legs that are pivotally and translatably attached at their upper end to a frame of the bed and caster support members that are longitudinally aligned with the bed pivotally attached to the lower end of each leg. The caster support members each have a single caster assembly attached thereto. The means for maintaining verticality of the caster stem incorporates a constraint means that urges the caster support member in a direction of rotation opposite to that of the leg during adjustment of the height of the bed.

Abstract: An isolation system with imaging or radiation therapy capability is disclosed. At least one containment barrier (14, 15, 16, 17) defines an isolation region (10). An imaging or therapy system (20) is disposed outside of the isolation region. The containment barrier includes a substantially hollow tubular extension (24, 42, 44, 124, 224, 324) protruding away from the isolation region (10). The substantially hollow tubular extension surrounds an interior volume (26) that is in fluid communication with the isolation region and is in fluid isolation from the imaging or therapy system. The substantially hollow tubular extension is made at least partially of a material providing operative communication between the imaging or therapy system and the interior volume of the substantially hollow tubular extension.

Abstract: A mattress frame that occupies a small volume and can be used by a recipient without having to assemble the frame. The frame has four connected sides and is made of foam. The frame is rectangular in shape and has two longer sides and two shorter sides. The two shorter sides are folded in a U shape so that a bow-tie-shaped frame results. The bow-tie-shaped frame is rolled and packaged in a container. The frame can be rolled to form a spiral or an M-shape. A recipient of the rolled frame removes the frame from its packaging and the frame expands to its intended shape.

Abstract: A bed occupancy state detection method includes detecting loads applied to a head side right portion, a head side left portion, a foot side right portion, and a foot side left portion of a bed platform by first to fourth load detecters, respectively, judging whether or not a prescribed judgment formula is satisfied based on load values outputted from the first to fourth load detecters, and notifying information on a bed occupancy state of an object in cases where it is judged that a judgment formula is satisfied from a judgment result at the judgment.

Abstract: A massage table assembly includes a tabletop with a top side, a bottom side, a first end, a second end, a first lateral edge and a second lateral edge. The tabletop has a primary aperture therein extending into the top side nearer to the first end than the second end. The primary aperture is elongated. Each of a plurality of insets is individually positionable in the primary aperture. The insets each have a pair of openings therein configured to receive breasts of a person lying face down on the tabletop. The openings extend into an upper surface and outwardly of a lower surface of each of the insets. Each of the insets has pairs of openings has different sizes with respect to other ones of the insets. A plurality of legs is attached to and extends downwardly from the bottom side.

Abstract: A bed with a leg assembly coupled to a support link assembly by a joint, the joint comprising a slot having at least two paths. A support link assembly defining a length that automatically varies as the support link assembly moves relative to the leg assembly.

Abstract: An emergency response treatment bed system. The emergency response beds may include a frame having a pair of opposing tubular stainless steel side supports and a pair of opposing tubular stainless steel end supports. The side supports and end supports are affixed each to the other by corner fixtures. A plurality of collapsible support legs are affixed to the frame. The support legs have an upper end and a lower end, and are adapted to support the frame above a selected substrate. A support deck is coupled to the frame. The support deck is adapted to support a patient body, and is provided with a liquid impervious, molded thermoplastic contaminant resistant cleanable surface. The support deck also has, above at least some of the support legs, a cutout portion defined by edgewalls, to provide access through the support deck to the support legs, so that multiple beds may be stacked one above the other, using support inserts between vertically adjacent support legs.

Abstract: A module bedding system comprises a universal base having removable mattress supporting panels, a headrest adjustable module and a footrest adjustable module. The universal base may be used with the removable panels in place to support a conventional non-adjustable mattress or the removable panels may be removed and the adjustable modules substituted to enable the base to support either a headrest adjustable mattress or a headrest and footrest adjustable mattress.

Abstract: This invention is directed towards a patient single surface system, PS3, which is a next generation system solution for patient accommodation, diagnosis, treatment, transfer and transport. PS3 provides a single surface for the patient to remain on from the trauma site through diagnosis, treatment and convalescence. Needs addressed by the PS3 system include improved patient treatment through reduction in time to treatment, reduced or eliminated unnecessary patient movement and injury, as well as improved comfort throughout treatment and convalescence. In addition, the PS3 system solves significant economic considerations.

Abstract: A transport cart for attaching to a patient care apparatus having a locking system that converts the forward caster of the transport cart from an omni-directional pivotable caster to a fixed directional device by restraining its pivoting about a vertical axis. The forward caster is located at about the center of the footprint of the combined transport cart/patient care apparatus and the fixed directional movement of the forward caster provides stability in moving the combined apparatus. The locking mechanism may be internal to the caster or may have a pair of pivotable lock arms that contact the patient care apparatus as the two are brought together and the pivotable lock arms pivot to a locked position where they sandwich the caster therebetween to restrain its ability to pivot. The locking mechanism automatically or manually releases the forward caster to again freely pivot when the transport cart/patient care apparatus are separated.

Abstract: A collapsible hydraulically operated ambulance cot having a support frame, a wheeled base, a support mechanism disposed therebetween, and a lift system for hydraulically moving the upper frame relative to the lower frame is disclosed. The lift system permits a single attendant to raise the cot from a lowered position to a raised position, and an infinite number of positions therebetween, and to raise the wheeled base relative to the support frame to situate the cot onto an elevated surface such as the transport deck of an ambulance. A manual override is also provided to conserve battery power and as a back-up in no-power situations. It is to be appreciated that the above described manual override mode may be used when raising or lowering the cot without power assist, dropping the undercarriage when unloading from a vehicle, and lifting the undercarriage when loading into a vehicle.

Abstract: A portable self-contained bed-on-demand system is presented which includes a portable collapsible self-contained storage bed and support assembly and a portable self-contained peripheral support system, or headwall, adapted to the bed that supplies medical-grade power, ventilation, and an oxygen treatment system. The bed-on-demand system duplicates, in a self-contained package usable outside a hospital environment, the critical facilities provided to a patient in a traditional hospital room.

Abstract: A transport cart for attaching to a patient care apparatus having a locking system that converts the forward caster of the transport cart from an omni-directional pivotable caster to a fixed directional device by restraining its pivoting about a vertical axis. The forward caster is located at about the center of the footprint of the combined transport cart/patient care apparatus and the fixed directional movement of the forward caster provides stability in moving the combined apparatus. The locking mechanism may be internal to the caster or may have a pair of pivotable lock arms that contact the patient care apparatus as the two are brought together and the pivotable lock arms pivot to a locked position where they sandwich the caster therebetween to restrain its ability to pivot. The locking mechanism automatically or manually releases the forward caster to again freely pivot when the transport cart/patient care apparatus are separated.

Abstract: A patient handling device, such as a bed, stretcher, cot, or the like, includes a motor for driving one or more wheels to assist in the movement of the device. At least one proximity sensor is positioned on the device in order to detect the presence of one or more objects that may lie in the path of the device when it moves. A controller on the device determines the distance between itself and the object and automatically controls the speed of the device in a manner designed to reduce the likelihood of a collision and/or to mitigate the impact of a collision. The automatic speed control of the device may follow one or more predetermined profiles that correlate certain parameters, such as a distance to the object or relative velocity, with a maximum acceptable speed of the device.

Abstract: A trolley is provided and includes at least one driven wheel and non-driven wheels. The at least one drive wheel may be moved to a position clear of the ground or to a position in which it contacts the ground with the adjacent non-driven wheels being raised off the ground. Movement between these two positions is effected by pivoting a sub-frame to which the driven wheel and the non-driven wheels are connected. During this movement, the region of the trolley above the driven wheel is first lowered and then raised slightly such that the end elevation of the support for a patient remains the same.

Abstract: A patient support including a traction device for powered movement of the patient support.

Abstract: A support platform having a stowed configuration and a deployed configuration on a floor. The support platform is related to stretcher devices that are used for transporting, confining, or conducting medical procedures on medical patients in medical emergencies. The support platform typically includes a work surface that has a geometric extent. A base that typically includes a plurality of frame members is provided, and the frame members are disposed across the geometric extent of, and proximal to, the work surface in the stowed configuration. The frame members are typically disposed on the floor in the deployed configuration. There is a foldable bracing system engaged with the work surface and engaged with the base. At least a portion of the foldable bracing system is disposed substantially inside at least a portion of the plurality of frame members in the stowed configuration.

Abstract: A portable and foldable bed is disclosed, in which a support strength of a rotation support leg is enhanced by installing a triangle support plate at an engaged portion between a rotation pole of a rotation support leg and a connection bar, and a fixing plate with a width twice the width of a bed frame is provided in a bed frame engagement unit of a fixing support leg, and a closer contact unit is provided between the fixing plate and the fixing support leg for thereby obtaining a stable engagement of the same, and a foldable spring is disposed between a lower horizontal bar of a center support par and an outer frame of a bed frame, so a folding operation can be easily performed during a folding operation of a bed.