CN106821636B - Bed - Google Patents

Abstract

The invention provides a bed which can obtain comfortable use feeling without compression of abdomen and the like when a lower half body side lying couch part is in a bending state. The lower body side couch section (40) includes a first portion (41) on which the thigh side is placed and a second portion (42) on which the calf side is placed. The second portion (42) includes a base end portion (42a) connected to the second end portion (41b) of the first portion (41), and a tip end portion (42b) which is an end portion on the opposite side. The lower body side couch portion (40) is deformable to a reference state (PS) in which the couch surface is horizontal and a mountain-shaped folded state (PF) in which a base end portion (42a) of the second portion (42) is a vertex. In the bent state (PF), the front end (42b) of the second portion (42) is positioned below the bed surface in the reference state (PS) and is inclined.

Description

Bed

Technical Field

The present invention relates to a bed in which a lower body side reclining bed portion on which a lower body side of a user is placed is deformable to a bent state.

Background

Conventionally, various proposals have been made in which a bed portion including a lower body side bed portion on which a lower body side of a user is placed and an upper body side bed portion on which an upper body side of the user is placed is supported on a bed frame. Such a bed is suitable as, for example, a nursing bed or a nursing bed because the position and angle of the lower body side bed portion and the upper body side bed portion can be adjusted.

In patent document 1, a first portion on which the thigh of the user is placed and a second portion on which the calf of the user is placed are connected to each other so as to be bendable to the lower half bed. Therefore, the lower body side couch portion of the bed can be deformed into a reference state in which the couch surface is horizontal in a bed side view and a bent state in which the couch portion is folded into a mountain shape with a connecting portion between the first portion and the second portion as an apex. Therefore, in the curved state, the user on the bed portion can lean his or her legs along the mountain-like folded shape of the lower body side bed portion.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open No. 2005-124651

Disclosure of Invention

Problems to be solved by the invention

In patent document 1, the second portion on which the lower leg of the user is placed is always located above the bed surface in the reference state. Therefore, when the lower body side couch portion is in a curved state, the user on the couch portion tends to press the abdomen or the like due to the leg portion, particularly, the lower leg, lifted up by the lower body side couch portion.

The present invention has been made in view of the above circumstances, and a main object thereof is to provide a bed that can provide a comfortable feeling of use without pressure on the abdomen or the like even when the lower body side couch portion is in a curved state.

Means for solving the problems

The present invention provides a bed supported by a bed frame, the bed including a lower body side bed portion on which a lower body side of a user is placed and an upper body side bed portion on which an upper body side of the user is placed, the bed being characterized in that the lower body side bed portion includes a first portion on which a thigh side of the user is placed and a second portion on which a lower leg side of the user is placed, the first portion includes a first end portion connected to the first portion so as to be rotatable about a horizontal axis extending in a bed width direction and a second end portion on the second portion side, the second portion includes a base end portion connected to the second end portion of the first portion so as to be bendable and a front end portion which is an end portion opposite to the base end portion, and the lower body side bed portion is changeable to a bent state in which the lower body side bed portion is horizontal to the bed surface and a mountain-like folded state in which the base end portion of the second portion is an apex In the curved state, the distal end portion is inclined at a position lower than the bed surface in the reference state.

In the bed according to the present invention, it is preferable that the frame has a frame supporting point portion that supports only a portion of the second portion on the base end side of the front end portion, and the second portion is supported by the second end portion of the first portion and the frame supporting point portion in the bent state.

In the bed according to the present invention, it is preferable that the frame supporting portion protrudes upward from the bed frame and supports the second portion from below.

In the bed according to the present invention, preferably, the frame fulcrum portion includes: a horizontal surface portion that supports the second portion of the horizontal state and is horizontal in the reference state; and an inclined surface portion supporting the second portion in an inclined state in the bent state and substantially parallel to the second portion in an inclined state.

In the bed according to the present invention, it is preferable that the frame includes a lower frame provided on a floor surface and an upper frame disposed above the lower frame, and the frame supporting point portion is provided at an end portion of the upper frame on a lower body side of the user.

In the bed according to the present invention, preferably, the length of the upper frame is shorter than the length of the lower frame in the bed length direction.

In the bed according to the present invention, preferably, the bed frame includes a pair of side frames extending in the bed length direction on both sides in the bed width direction,

the pair of side frames are not connected to the end of the lower body of the user and are open.

In the bed according to the present invention, it is preferable that the ends of the pair of side frames on the upper half side of the user are fixed by a headboard.

In the bed according to the present invention, a foot board is preferably fixed to the front end of the second portion.

Effects of the invention

In the present invention, the lower body side couch portion includes a first portion on which the thigh side of the user is placed and a second portion on which the calf side of the user is placed, the first portion includes a first end portion connected to the frame so as to be rotatable about a horizontal axis extending in the bed width direction and a second end portion on the second portion side, the second portion includes a base end portion connected to the second end portion of the first portion so as to be bendable and a front end portion that is an end portion on the opposite side of the base end portion, and the frame has a frame fulcrum portion that supports only a portion of the second portion on the base side of the front end portion. Such a second part determines its angle of inclination in a side view of the bed by two points, the second end of the first part and the frame fulcrum of the frame. Therefore, the height of the distal end portion of the second portion can be easily set at an arbitrary position.

In the present invention, the lower body side couch portion is deformable in a bed side view into a reference state in which the couch surface is horizontal and a bent state in a mountain-folded shape in which a proximal end portion of the second portion is an apex. Therefore, in the bent state, the user on the bed portion can lean his or her legs along the mountain-like folded shape of the lower body side bed portion.

In the present invention, in the bent state, the second portion is supported by the second end portion of the first portion and the frame fulcrum portion, and the distal end portion is inclined at a position lower than the bed surface in the reference state. Therefore, even when the leg is lifted by the lower body side couch portion, the lower leg can be positioned lower than before. Therefore, the bed of the present invention can reduce the pressure on the abdomen and the like in a bent state as compared with the conventional bed, and can provide a comfortable feeling of use.

Drawings

Fig. 1 is a perspective view showing one embodiment of a bed of the present invention.

Fig. 2 is an exploded perspective view of the bed of fig. 1.

Fig. 3 is a perspective view of the lower frame.

Fig. 4 is a perspective view of the upper frame.

Fig. 5 is a top view of the elevation structure.

Fig. 6 is a sectional view taken along line a-a of fig. 5.

Fig. 7 is a partial sectional view of the lower body side couch portion.

Fig. 8 is a partial sectional view of the upper half-body side couch.

Fig. 9 is a sectional view of the bed with the lower body side couch portion in a reference state.

Fig. 10 is a sectional view of the bed with the lower body side couch portion in a curved state.

Detailed Description

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

Fig. 1 shows a perspective view of a bed 1 according to the present embodiment. As shown in fig. 1, a bed 1 of the present embodiment includes a bed frame 2 provided on a floor surface F (not shown), and a bed portion 3 supported by the bed frame 2 and on which a user is placed. The bed 1 of the present embodiment can adjust the height and angle of the bed portion 3, and is suitable as a nursing bed and a nursing bed, for example.

The bed 1 comprises a headboard 26 at one side in the length direction of the bed. In the present specification, the headboard 26 side of the bed 1 is referred to as the upper half (hereinafter, sometimes simply referred to as "upper half") S1 of the user, and the opposite side to the headboard 26 side of the bed 1 is referred to as the lower half (hereinafter, sometimes simply referred to as "lower half") S2 of the user.

In fig. 2 an exploded perspective view of the bed 1 is shown. As shown in fig. 2, the bed frame 2 of the bed 1 includes, for example, a lower frame 10 provided on a floor F (not shown), and an upper frame 20 disposed above the lower frame 10 and supporting the bed portion 3. The lower frame 10 and the upper frame 20 are preferably connected by a lifting structure 30 that vertically lifts the upper frame 20 relative to the lower frame 10.

A perspective view of the lower frame 10 is shown in fig. 3. As shown in fig. 3, the lower frame 10 includes, for example, at least four, that is, four leg portions 11 in the present embodiment, and a lower frame portion 12 connecting the leg portions 11. The lower frame portion 12 includes, for example, a pair of lower vertical frames 12A extending in the bed longitudinal direction, and a plurality of, i.e., two lower horizontal frames 12B in the present embodiment extending in the bed width direction and connecting the pair of lower vertical frames 12A. The four leg portions 11 are preferably provided at both ends of the pair of lower vertical frames 12A in the bed longitudinal direction.

The lower frame 10 of the present embodiment further includes a slide rail 13 and a link fulcrum portion 14 connected to the lifting structure 30 (shown in fig. 2). The slide rail 13 and the link fulcrum 14 are preferably provided in plural numbers. In the present embodiment, two slide rails 13, that is, four slide rails 13 in total, are provided on each lower vertical frame 12A of the lower frame 10. The link fulcrum portions 14 of the present embodiment are provided adjacent to the slide rails 13 in the same number as the slide rails 13.

Preferably, the lower frame 10 is further provided with a plurality of guide members 15 on the lower vertical frame 12A. The guide member 15 is formed by, for example, bending a narrow tube, and can prevent a user's foot from entering the inside of the lower frame 10.

A perspective view of the upper frame 20 is shown in fig. 4. As shown in fig. 4, the upper frame 20 includes, for example, at least four, that is, four support portions 21 in the present embodiment connected to the lifting mechanism 30 (shown in fig. 2), and an upper frame portion 22 that fixes the support portions 21 so as not to be relatively rotatable.

The support portion 21 includes a lower end portion 21a connected to the lifting structure 30 (shown in fig. 2) and an upper end portion 21b fixed to the upper frame portion 22. The lower end 21A of the support portion 21 is provided with an auxiliary leg 21A that can be placed on the floor F (not shown) as described below.

The upper frame portion 22 includes, for example, a pair of upper vertical frames 22A extending in the bed longitudinal direction, a first upper horizontal frame 22B having a circular cross section and a second upper horizontal frame 22C having a rectangular cross section, which extend in the bed width direction and connect the pair of upper vertical frames 22A. Two first upper horizontal frames 22B and two second upper horizontal frames 22C are provided, respectively, in the present embodiment. The four support portions 21 are preferably provided in two on each of the two first upper horizontal frames 22B.

The upper frame 20 of the present embodiment further includes a plurality of support frames 23 for supporting the bed portion 3 (shown in fig. 2) from below and a plurality of frame fulcrum portions 24 above the upper frame portion 22. The support frame 23 preferably extends in the bed width direction, and an end portion 23a thereof protrudes outward in the bed width direction from the upper vertical frame 22A.

The frame fulcrum portion 24 is preferably provided at an end portion 22Aa of the lower body side S2 of the upper vertical frame 22A so as to protrude upward from the upper vertical frame 22A. The frame supporting point portion 24 of the present embodiment supports the bed portion 3 from below by a horizontal surface portion 24a and an inclined surface portion 24b described below. The horizontal plane portion 24a and the inclined plane portion 24b are preferably connected by a smooth arc surface portion 24 c.

As shown in fig. 2, the length of the upper frame 20 is preferably shorter than the length of the lower frame 10 in the bed length direction. By increasing the length of the lower frame 10, the stability of the bed 1 is improved. Further, by reducing the length of the upper frame 20, interference with the bed portion 3 when the bed portion 3 is movable can be avoided.

The bed frame 2 preferably further includes a pair of side frames 25 extending in the bed length direction on both sides of the upper frame 20 in the bed width direction. The side frame 25 is fixed to, for example, an end 23a of the support frame 23. The end 25a of the upper half side S1, for example, of the pair of side frames 25 is fixed to the headboard 26. On the other hand, the pair of side frames 25 are preferably not connected to the end 25b of the lower body side S2 and are open.

The bed frame 2 preferably further includes a pair of side plates 27 attached to the side frames 25 so that the position in the bed longitudinal direction can be adjusted. The side plate 27 includes, for example, a plurality of mounting rods 27a inserted into a plurality of mounting holes 25c of the side frame 25. In the present embodiment, each side frame 25 has six attachment holes 25c, and each side plate 27 has two attachment rods 27 a. Since the side plate 27 can be selectively inserted into the mounting hole 25c of the mounting rod 27a, the position adjustment in the longitudinal direction of the bed can be easily performed.

The lifting structure 30 of the present embodiment includes: a lift lever 31 that connects the upper frame 20 and the lower frame 10 to each other so as to be movable relative to each other and is swingable about a horizontal shaft extending in the bed width direction; and a lift actuator 37 (shown in fig. 5) that swings the lift lever 31. The lifting structure 30 includes at least four lifting rods 31 in this embodiment. The upper frame 20 and the lower frame 10 are connected by the lifter 31 at least four points, i.e., four points in the present embodiment.

A top view of the lifting structure 30 is shown in fig. 5. As shown in fig. 5, the pair of lift rods 31 arranged in the bed width direction are fixed by a rod connecting shaft 33, for example, so as not to be relatively rotatable. The lever connecting shaft 33 of the present embodiment includes a first lever connecting shaft 33A disposed on the upper body side S1 and a second lever connecting shaft 33B disposed on the lower body side S2. The first lever connecting shaft 33A and the second lever connecting shaft 33B are respectively provided with a first lift arm 34. Each first lift arm 34 is connected to a connecting rod 35 extending in the longitudinal direction of the bed in a revolute pair manner.

The first lever connecting shaft 33A of the present embodiment is further provided with a second lift arm 36. The second lift arm 36 is connected to, for example, a lift actuator 37 that swings the lift lever 31, and rotates the first lever connecting shaft 33A. Therefore, the lift actuator 37 can rotate the first rod connecting shaft 33A via the second lift arm 36, and the first rod connecting shaft 33A can rotate the second rod connecting shaft 33B via the first lift arm 34 and the connecting rod 35. Thus, the four lifter bars 31 fixed to the first and second bar connecting shafts 33A and 33B can swing in substantially the same motion.

The cross-sectional view of line a-a of figure 5 is shown in figure 6. As shown in fig. 6, the lift lever 31 of the lift structure 30 of the present embodiment includes a first connecting portion 31a connected to the upper frame 20 side and a second connecting portion 31b connected to the lower frame 10 side. The lift lever 31 preferably further includes a third connecting portion 31c connected to a lift link 32 described below between the first connecting portion 31a and the second connecting portion 31 b.

The first connecting portion 31a of the lifter 31 of the present embodiment is connected to the support portion 21 of the upper frame 20 via a rod connecting shaft 33 in a revolute pair manner. The second connecting portion 31b is connected to the slide rail 13 of the lower frame 10 as a rotary slide pair slidable in the horizontal direction. Since the lifting structure 30 can lift and lower the upper frame 20 according to the swing of the lifting rod 31, the height of the upper frame 20 can be easily adjusted according to the use state of the bed 1.

The elevation structure 30 preferably further includes an elevation link 32 connecting the lower frame 10 and the elevation bar 31 and swingable about a horizontal shaft extending in the bed width direction. Such a lifting link 32 is preferably provided for each lifting lever 31.

The lifter link 32 of the present embodiment includes a first link end 32a connected to the lifter bar 31 and a second link end 32b connected to the lower frame 10 side. The first link end 32a is connected to the third link portion 31c of the lifter 31, for example, in a revolute pair manner. The second link end 32b is connected to the link fulcrum portion 14 of the lower frame 10, for example, in a revolute pair manner.

A length L1 between the first link end 32a and the second link end 32b of the lift link 32 is equal to a length L2 between the first connecting portion 31a and the third connecting portion 31c of the lift link 31. Such a lifting link 32 can lift the first connection portion 31a of the lifting lever 31 in the vertical direction.

One end 37a of the lift actuator 37 of the present embodiment is connected to the second lift arm 36 of the first rod connecting shaft 33A, and the other end 37b of the lift actuator 37 is connected to the upper frame 20. The lift actuator 37 is preferably an electric cylinder that can be changed to any length, for example. In the present embodiment, one lift actuator 37 lifts and lowers the upper frame 20 in the vertical direction with respect to the lower frame 10.

Although the description is omitted, the lifting lever 31 and the lifting link 32 of the lifting structure 30 on the second lever connecting shaft 33B side have the same configuration as the lifting structure 30 on the first lever connecting shaft 33A side except for the second lifting arm 36 and the lifting actuator 37.

As shown in fig. 1, the bed portion 3 of the present embodiment includes a lower body side bed portion 40 on which the lower body side of the user is placed, and an upper body side bed portion 50 on which the upper body side of the user is placed. The bed portion 3 preferably further includes a center bed portion 60 on which the buttocks of the user are placed between the lower half-body side bed portion 40 and the upper half-body side bed portion 50.

The lower half-body side bed portion 40, the upper half-body side bed portion 50, and the center bed portion 70 are provided with a cushion material (not shown) such as urethane foam, for example. Such a cushion material preferably continues from the lower body side couch portion 40 to the upper body side couch portion 50. In addition, it is preferable that at least the cushioning material of the upper half-body side S1 is fixed to the upper half-body side couch portion 50.

Fig. 7 shows a partial sectional view of the lower body side couch portion 40. As shown in fig. 7, the lower body side couch portion 40 of the present embodiment includes a first portion 41 on which the upper body side S1 on the thigh side of the user is placed, and a second portion 42 on which the lower body side S2 on the lower leg side of the user is placed. The first section 41 is preferably shorter in length in the length direction of the bed than the second section 42.

The first portion 41 includes: a first end portion 41a connected to the upper frame 20 via a lower body side bracket 43 so as to be rotatable about a horizontal axis extending in the bed width direction; and a second end portion 41b on the second portion 42 side.

As shown in fig. 2, in the present embodiment, a pair of lower body side brackets 43 arranged apart in the bed width direction are fixed so as to be relatively non-rotatable by a lower body side connecting shaft 44 extending in the bed width direction. The lower body side connecting shaft 44 is preferably further provided with a lower body side arm 45 extending in a direction orthogonal to the lower body side bracket 43.

As shown in fig. 7, the lower body side arm 45 is connected to, for example, a lower body side actuator 46, and rotates the lower body side connecting shaft 44. The lower body side actuator 46 of the present embodiment has one end 46a connected to the lower body side arm 45 and the other end 46b connected to the upper frame 20. The lower body side actuator 46 is preferably an electric cylinder that can be changed to an arbitrary length, for example. In the present embodiment, one lower body side actuator 46 tilts the first portion 41 with respect to the upper frame 20.

The second portion 42 includes: a base end portion 42a connected to the second end portion 41b of the first portion 41 in a bendable manner; and a distal end portion 42b opposite to the proximal end portion 42 a. The second portion 42 is supported from below by the frame supporting point 24 of the upper frame 20 only on the base end portion 42a side of the distal end portion 42 b. Such a second portion 42 determines its tilt angle in the bed side view by two points of the second end portion 41b of the first portion 41 and the frame fulcrum portion 24. Therefore, the height of the front end portion 42b of the second portion 42 can be easily set at an arbitrary position.

The second portion 42 tilts in the opposite direction to the first portion 41 in accordance with the tilting of the first portion 41. Therefore, the inclined surface portion 24b of the frame fulcrum portion 24 is most preferably a surface substantially parallel to the second portion 42 after tilting. That is, the frame fulcrum portion 24 includes: a horizontal surface portion 24a that supports the second portion 42 in a horizontal state and is horizontal; and an inclined surface portion 24b that supports the inclined second portion 42 and is substantially parallel to the inclined second portion 42.

A foot pedal 47 is fixed to the front end 42b of the second portion 42 in this embodiment. Therefore, the pedal plate 47 tilts in association with the tilting of the second portion 42. Therefore, even in a state where the second section 42 is inclined, bedding (not shown) and a user can be prevented from falling down.

As shown in fig. 1, the upper half-body side couch portion 50 of the present embodiment includes a third portion 51 on which the head side of the user is placed, and a fourth portion 52 on which the back of the user is placed. The third section 51 is preferably shorter in length in the length direction of the bed than the fourth section 52. The third portion 51 is connected to the fourth portion 52 in a tiltable manner, for example, by a pair of head links 53. The fourth section 52 is connected to the frame 2 in a tiltable manner, for example, by an upper body side bar 54 (shown in fig. 8).

A partial cross-sectional view of the upper half-body side couch portion 50 is shown in fig. 8. As shown in fig. 8, each head link 53 of the present embodiment includes a first head link 53A and a second head link 53B. The first head link 53A is disposed at a position farther than the second head link 53B with respect to the third portion 51. First head link 53A is preferably longer than second head link 53B. Each head link 53 is a revolute pair in which each connecting portion is rotatable about a horizontal axis extending in the bed width direction. Such a head link 53 constitutes a trapezoidal link structure, and enables the third section 51 to tilt relative to the fourth section 52.

First head link 53A is preferably integrally formed with head arm 55. The head arm 55 is connected to an upper body side link 57 via a rod 56, for example. One end 56a of the lever 56 is connected to the head arm 55 in a revolute pair manner, and the other end 56b of the lever 56 is connected to the upper-body link 57 in a revolute pair manner. The other end 56b of the lever 56 limits its range of motion, for example, by means of a long hole 52a provided in the fourth portion 52. Such a rod 56 is preferably disposed along the fourth portion 52.

The upper half link 57 is configured to have a substantially "く" shape, for example, by connecting a first upper half link 57A and a second upper half link 57B. The first upper half link 57A is connected to the rod 56 in a revolute pair manner, and is connected to the long hole 52a of the fourth portion 52 in a revolute sliding pair manner. The second upper half link 57B is connected to the fourth section 52 in a revolute pair.

The upper half link 57 is pressed by the upper half arm 58, for example. The upper body side arm 58 includes a first end side arm 58a, a second end side arm 58b, and a central portion 58c located between the first end side arm 58a and the second end side arm 58 b. The center portion 58c of the upper body side arm 58 is connected to the upper frame 20, for example, in a rotationally sliding pair manner. The upper body side arm 58 preferably has one end side arm 58a pressing the upper body side link 57 and the other end side arm 58b connected to the upper body side actuator 59. Such upper half-body arm 58 can be linked with the upper half-body bar 54 to tilt the fourth portion 52 relative to the upper frame 20.

One end 59a of the upper half-body actuator 59 of the present embodiment is connected to the other-end side arm 58b of the upper half-body arm 58, and the other end 59b of the upper half-body actuator 59 is connected to the upper frame 20. The upper half-body actuator 59 is preferably an electric cylinder that can be changed to an arbitrary length, for example. In the present embodiment, one upper half-body actuator 59 tilts the third section 51 and the fourth section 52 relative to the upper frame 20.

As shown in fig. 1, the center bed portion 60 is preferably fixed to the frame 2 so as not to be movable relative to the frame 2.

Next, the operation of the second section 42 when the lower body side couch portion 40 of the bed 1 of the present embodiment is tilted will be described. Fig. 9 shows a sectional view of the bed 1 in which the lower body side couch portion 40 is in the reference state PS. As shown in fig. 9, in the present embodiment, in the bed side view, the lower body side actuator 46 is in the shortest state in the reference state (hereinafter, sometimes simply referred to as "reference state") PS in which the bed surface of the lower body side bed portion 40 is parallel to the floor surface F, that is, in the horizontal state.

In the bed-side view, in the reference state PS, the first section 41 is in a horizontal state in which the bed surface is parallel to the floor surface F. At this time, the second end 41b of the first portion 41 is substantially the same height as the first end 41 a.

In the reference state PS, in the second section 42 of the lower half-body bed 40, the proximal end portion 42a of the second section 42 is supported by the second end portion 41b of the first section 41. In the second portion 42, only a portion of the second portion 42 on the base end portion 42a side of the tip end portion 42b is supported by the horizontal plane portion 24a of the frame supporting point portion 24 of the upper frame 20. The second section 42 is also in a horizontal state in which the bed surface is parallel to the floor surface F, and the front end 42b of the second section 42 is at the same height as the base end 42 a.

Fig. 10 shows a sectional view of the bed 1 in which the lower body side couch portion 40 is in a curved state PF. As shown in fig. 10, in the present embodiment, the lower body side actuator 46 is in the longest state in the bed side view in the bending state PF in which the bed surface of the lower body side bed portion 40 is inclined to the maximum extent (hereinafter, sometimes simply referred to as the "bending state"). In the curved state PF, the lower body side couch portion 40 has a mountain-like folded shape having the second end portion 41b of the first portion 41 and the base end portion 42a of the second portion 42 as vertexes. Therefore, in the bent state PF, the user on the bed portion 3 can lean his or her legs along the mountain-like folded shape of the lower body side bed portion 40.

In the bed side view, in the bent state PF, the first section 41 is in an inclined state in which the bed surface is inclined with respect to the floor surface F. At this time, the second end 41b of the first portion 41 is located above the first end 41 a.

In the flexed state PF, in the second section 42 of the lower half-body side bed 40, the base end portion 42a of the second section 42 is supported by the second end portion 41b of the first section 41, as in the reference state PS. In the second portion 42, only a portion of the second portion 42 on the base end portion 42a side of the tip end portion 42b is supported by the inclined surface portion 24b of the frame supporting point portion 24 of the upper frame 20.

In the second section 42, the bed surface is inclined in a direction opposite to the first section 41 with respect to the floor surface F, and the distal end 42b of the second section 42 is located below the proximal end 42 a. At this time, the front end 42b of the second section 42 is inclined below the bed surface in the reference state PS. Therefore, even when the leg of the user is raised by the lower body side couch portion 40, the lower leg can be positioned lower than before. Therefore, the bed 1 of the present embodiment reduces the pressure on the abdomen and the like in the bent state PF compared to the conventional bed, and can provide a comfortable feeling of use.

As shown in fig. 9 and 10, the lower body side couch portion 40 of the present embodiment is deformable to the reference state PS and the flexed state PF in the bedside view. At this time, the footrest 47 tilts with the tilting of the second portion 42 of the lower body side couch portion 40, so that bedding (not shown) on the lower body side couch portion 40, a user, and the like can be prevented from falling. Further, since the end 25b of the lower body side S2 of the pair of side frames 25 of the bed frame 2 is open, there is no possibility that bedding, a user, or the like is caught between the second section 42 and the bed frame 2 when the frame is deformed from the bent state PF to the reference state PS.

The lower body side couch portion 40 may be set to the intermediate state PC between the reference state PS and the flexed state PF. In the intermediate state PC, similarly to the reference state PS and the bending state PF, in the second section 42 of the lower half-body side couch portion 40, the base end portion 42a of the second section 42 is supported by the second end portion 41b of the first section 41. In the second portion 42, only a portion of the second portion 42 on the base end portion 42a side of the tip end portion 42b is supported by the arc surface portion 24c of the frame fulcrum portion 24 of the upper frame 20.

While the above description has been made in detail with respect to the particularly preferred embodiment of the present invention, the present invention is not limited to the above embodiment, and can be implemented by being modified into various embodiments.

In the above-described embodiment, the second portion 42 is supported from below by the frame fulcrum portion 24, but for example, if the support portion of the second portion 42 is located closer to the base end portion 42a than the tip end portion 42b, the second portion 42 may be supported from the side surface side. Such a bearing is preferably supported as a rotary sliding pair.

In the above-described embodiment, the horizontal plane portion 24a and the inclined plane portion 24b of the frame fulcrum portion 24 are connected by the arc surface portion 24c, but may be connected by a plurality of inclined plane portions having different angles, for example. This is effective particularly when the tilt angle of the lower body side couch portion 40 is adjusted in stages.

In the above-described embodiment, the bed frame 2 is raised and lowered by the raising and lowering mechanism 30, but the lower body side couch portion 40 may be applied to a bed 1 without the raising and lowering mechanism 30, for example.

Description of the reference numerals

2 bedstead

40 lower half body side lying couch part

41 first part

41b second end portion

42 second part

Base end portion of 42a

42b front end portion

50 upper half body side lying couch part

Claims (7)

1. A bed, wherein a bed part is supported by a bed frame, the bed part comprises a lower body side bed part for placing the lower body side of a user and an upper body side bed part for placing the upper body side of the user,

the bed is characterized in that,

the lower body side couch portion includes a first portion on which the thigh side of the user is placed and a second portion on which the calf side of the user is placed,

the first section includes a first end portion connected to the bed frame so as to be rotatable about a horizontal axis extending in a bed width direction, and a second end portion on the second section side,

the second portion includes a base end portion connected to the second end portion of the first portion in a bendable manner, and a tip end portion which is an end portion on the opposite side of the base end portion,

the lower body side couch portion is deformable in a bed side view into a reference state in which the lower body side couch portion is horizontal to the couch surface and a bent state in a mountain-folded shape in which the base end portion of the second portion is an apex,

in the bent state, the distal end portion of the second section is inclined at a position lower than the bed surface in the reference state,

the frame has a frame supporting portion for supporting only a portion of the second portion closer to the base end than the front end,

in the bent state, the second portion is supported by the second end portion of the first portion and the frame fulcrum portion,

the frame fulcrum portion includes: a horizontal surface portion that supports the second portion of the horizontal state and is horizontal in the reference state; and an inclined surface portion supporting the second portion in an inclined state in the bent state and substantially parallel to the second portion in an inclined state.

2. The bed of claim 1,

the frame supporting portion protrudes upward from the frame and supports the second portion from below.

3. The bed according to claim 1 or 2,

the bed frame comprises a lower frame arranged on the ground and an upper frame arranged on the upper side of the lower frame,

the frame fulcrum portion is provided at an end portion of the upper frame on the lower body side of the user.

4. The bed of claim 3,

the length of the upper frame is shorter than the length of the lower frame in the bed length direction.

5. The bed of claim 1,

the frame includes a pair of side frames extending in the bed length direction on both sides in the bed width direction,

the pair of side frames are not connected to the end of the lower body of the user and are open.

6. The bed of claim 5,

the user's upper body side ends of the pair of side frames are fixed by a headboard.

7. The bed of claim 1,

a foot board is fixed to the front end of the second portion.

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