Adjustable bed

Abstract

[Problem] To lower a support table as much as possible, make the height between a base and the ground as low as possible, and make casters as large as possible. [Solution] In an adjustable bed (1) according to the present application, the base of a thigh support table (21) for supporting the thighs of a lying person is inclinably provided on a support table (3), and the base of a shank support table (22) for supporting the shanks of the lying person is provided at the tip of the thigh support table (21) so as to be bendable up and down. When the support table (3) is lowered to the lowest with respect to the base (2) and the thigh support table (21) is tilted, the base of the thigh support table (22) is bent at the end of the thigh support table (21), and when the support table (3) is lowered to the lowest with respect to the base (2) and the thigh support table (21) is tilted, the end of the thigh support table (22) slides along the thigh support tables (50, 57). In this way, the end of the crus support table (22) is lifted above a protruding member (caster portions (10, 11), etc.) protruding from above the support table (3), so as to avoid a collision between the end of the crus support table (22) and the protruding member.

Description

TECHNICAL FIELD

[0001] The present application relates to an adjustable bed in which a support table that is liftable is provided on a base, and a support table that is tiltable is provided on the support table, for supporting the body of a person lying on the bed. BACKGROUND

[0002] A liftable adjustable bed used in hospitals, nursing facilities, home nursing / care, and the like, generally has a support table that is liftable provided on a base, and a support table that is tiltable provided on the support table, for supporting the body of a person lying on the bed (a person lying on the bed in a supine position, a side position, a prone position, and the like), and the support table can be lifted as a whole, or a part of the support table (for example, a position of the back, the thighs, and the lower legs of a person lying on the bed) can be tilted (for example, refer to Patent Literature 1).

[0003] In such a liftable adjustable bed, in order to facilitate the person lying on the bed to get on and off the bed, or to reduce the impact on the body when falling, it is desirable to lower the support table as much as possible, and to lower the height between the support table and the floor as much as possible.

[0004] On the other hand, particularly for adjustable beds used in hospitals and nursing facilities, it is desirable to increase the size of the casters installed on the base, in order to easily step over steps on the floor and to move more easily.

[0005] [Related Art Literature] [Patent Literature 1] Japanese Patent Application Laid-Open No. 2016-19613 SUMMARY [Problems to be Solved by the Invention] However, in the above-described conventional adjustable bed, when the support table is lowered to the maximum to make the height between the support table and the floor as low as possible, and when the size of the casters is as large as possible, and the support table is lowered to the lowest with respect to the base, the upper portion of the caster protrudes from the base.

[0006] In this way, if the support table is lowered to the lowest with respect to the base, there is a part that protrudes upward from the support table, and when the thigh support table is raised and tilted while the support table is lowered to the lowest, the end of the lower leg support table that is linked to the thigh support table can collide with the part that protrudes upward from the support table, which can prevent the lower leg support table from moving smoothly, and can also damage the lower leg support table or the part, and the like.

[0007] [Means for Solving the Problems] Therefore, in the present application according to claim 1, there is provided an adjustable bed including a base, a support table provided liftable on the base, and a support table provided tiltable on the support table for supporting a body of a person lying on the support table, the support table including a thigh support table for supporting thighs of the person lying on the support table, and a lower leg support table for supporting lower legs of the person lying on the support table, wherein a base of the thigh support table is provided freely tiltable on the support table, a base of the lower leg support table is provided freely bendable up and down at a distal end of the thigh support table, such that the base of the lower leg support table is bent at the distal end of the thigh support table as the thigh support table is tilted, and wherein when the support table is lowered to a lowest position with respect to the base and the thigh support table is tilted, a distal end of the lower leg support table is guided along the lower leg support table guide such that the distal end of the lower leg support table is lifted above a protruding member protruding upward from the support table, thereby avoiding collision between the distal end of the lower leg support table and the protruding member.

[0008] Further, in the present application according to claim 2, in the present application according to claim 1, the lower leg support table guide is accommodatively provided in a recess of a lower portion of the lower leg support table, and an upper surface of the lower leg support table supports the lower legs of the person lying on the support table.

[0009] Further, in the present application according to claim 3, in the present application according to claim 1 or claim 2, the lower leg support table guide is provided in the support table, and the distal end of the lower leg support table is always guided along the lower leg support table guide as the thigh support table is tilted regardless of a lifting state of the support table.

[0010] Further, in the present application according to claim 4, in the present application according to claim 1 or claim 2, the lower leg support table guide is provided in a protruding member which protrudes above the support table when the support table is lowered to a lowest position with respect to the base.

[0011] Further, in the present application according to claim 5, in the present application according to claim 4, a slider is provided in the distal end of the lower leg support table, and the slider is guided along the lower leg support table guide when the protruding member protrudes above the support table according to the lifting state of the support table, and the slider is guided along the support table when the protruding member does not protrude above the support table.

[0012] Further, in the present application according to claim 6, in the present application according to claim 4, the protruding member is a caster portion provided in the base.

[0013] [Technical Effects] Further, the present application has the following effects.

[0014] The adjustable bed of the present application, the support table is provided on the base and can be lifted, the support table is provided on the support table and can be inclined, the support table is provided on the support table and can be connected to the base of the thigh support table for supporting the thighs of the person lying on the bed, the end of the thigh support table is provided on the base of the calf support table for supporting the calves of the person lying on the bed, and the base of the calf support table is flexibly connected to the end of the thigh support table, so that the base of the calf support table is bent at the end of the thigh support table with the inclination of the thigh support table. When the support table is lowered to the lowest position and the thigh support table is inclined, the end of the calf support table slides along the calf support table guide, so that the end of the calf support table is lifted above the protruding part protruding upward from the support table, so that the collision between the end of the calf support table and the protruding part is avoided, and the calf support table can be smoothly moved even in the state that the support table is lowered to the lowest position, and damage due to the collision between the calf support table and the protruding part can be prevented. In this way, the height between the support table and the ground can be minimized, and the size of the caster and the like can be maximized as much as possible.

[0015] In particular, the upper surface of the calf support table can support the calves of the person lying on the bed, and when the support table is lowered to the lowest position relative to the base, the calf support table guide is accommodated in the recess of the calf support table, so that even if the calf support table guide is provided, the height between the base and the ground can be reduced when the support table is lowered to the lowest position.

[0016] In addition, the calf support table guide is provided on the support table regardless of the lifting state of the support table, and the end of the calf support table always slides along the calf support table guide when the thigh support table is inclined, so that regardless of the lifting state of the support table, the calf support table connected thereto can always maintain corresponding movement with the inclination of the thigh support table.

[0017] In addition, the calf support table guide is provided on the protruding part protruding upward from the support table when the support table is lowered to the lowest position relative to the base, and even if the protruding part is changed to a protruding part of different size, the collision between the protruding part and the end of the calf support table can be avoided.

[0018] In addition, the sliding member is provided at the end of the calf support table, and when the protruding part protrudes above the support table according to the lifting state of the support table, the sliding member slides along the calf support table guide, and when the protruding part does not protrude above the support table, the sliding member slides along the support table, so that only by providing a universal sliding member at the end of the calf support table, the collision between the protruding part and the end of the calf support table can be avoided regardless of the lifting state of the support table.

[0019] Furthermore, if the protruding member is a caster portion provided on the base, the size of the caster can be larger so as to facilitate the movement of the adjustable bed. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a plan view (a) and a side view (b) of an adjustable bed according to the present application.

[0021] Figure 2 is a plan view (a) and a side cross-sectional view (b) of a lifting mechanism of an adjustable bed.

[0022] Figure 3 is a plan view (a) and a side cross-sectional view (b) of an upper body tilt mechanism and a lower body tilt mechanism of an adjustable bed.

[0023] Figure 4 is a side enlarged cross-sectional view of an upper body tilt mechanism of an adjustable bed.

[0024] Figure 5 is a side enlarged cross-sectional view of a lower body tilt mechanism of an adjustable bed.

[0025] Figure 6 is an enlarged plan view of a calf rest platform.

[0026] Figure 7 is a side enlarged cross-sectional view corresponding to Figure 6 .

[0027] Figure 8 is a side enlarged cross-sectional view of a calf rest platform guide mounted on a support platform.

[0028] Figure 9 is a side enlarged cross-sectional view (a), (b) and an enlarged plan view (c) of a calf rest guide mounted on a caster portion.

[0029] REFERENCE NUMERALS: 1 adjustable bed 2 base 3 support platform 4 rest platform 5 lifting mechanism 6 upper body tilt mechanism 7 lower body tilt mechanism 8, 9 base frame 10, 11 caster portion 12, 13 connecting frame 14, 15 support platform frame 16 bed tail plate 17 bed head plate 18 connecting frame 19 hip rest platform 20 upper body support platform 21 thigh rest platform 22 calf rest platform 23 base side moving frame 24 support platform side moving frame 25, 26 cross bar 27 actuator 28 protector 29 support frame 30, 31 support arm 32 movable member 33, 34 roller 35 support frame 36 support member 37 actuator 38 protector 39 support frame 40, 41 support arm 42 movable member 43, 44 roller 45 support frame 46 support member 47 actuator 48 protector 49 bed 50 calf support table guide 51 inclined surface 52 plane 53 sliding member 54 recess 55 support frame 56 support surface 57 calf support table guide 58 sliding member 59 plane 60 inclined surface 61 upper end surface DETAILED DESCRIPTION Hereinafter, a specific structure of an adjustable bed according to the present application will be described with reference to the accompanying drawings.

[0030] As shown in Figures 1 to 3 , the adjustable bed 1 includes a base 2, a support table 3 detachably (assemblable, separable) provided at an upper portion of the base 2, and a support table 4 detachably (assemblable, separable) provided at an upper portion of the support table 3 for supporting a body of a person lying down. Between the base 2 and the support table 3, a lifting mechanism 5 is provided for lifting the support table 3 (the support table 4) as a whole with respect to the base 2. Further, between the support table 3 and the support table 4, an upper body tilting mechanism 6 is provided for partially tilting a portion (an upper body side) of the support table 4 with respect to the support table 3, and a lower body tilting mechanism 7 is provided for partially tilting a portion (a lower body side) of the support table 4 with respect to the support table 3. Here, for convenience, a right side (in Figure 1 ) of a person lying on the adjustable bed 1 is described as a front side, and a head side (in Figure 1 ) is described as a rear side.

[0031] The base 2 includes a pair of left and right base frames 8, 9 extending in a front-rear direction, connecting frames 12, 13 extending in a left-right direction, and caster portions 10, 11, wherein the base 2 is movable by the caster portions 10, 11, the caster portions 10, 11 are respectively installed at lower portions of front and rear ends of the base frames 8, 9, the caster portions 10, 11 are composed of casters and portions covering upper portions of the casters, and the connecting frames 12, 13 are installed (fixed) at front and rear portions between the left and right base frames 8, 9.

[0032] The support table 3 includes a pair of left and right support frames 14, 15 extending in the front-rear direction, a board (bed foot board 16, bed head board 17) detachably installed between the front end and the rear end of the support frames 14, 15, and a connecting frame 18 extending in the left-right direction installed (fixed) between the middle portions of the left and right support frames 14, 15. The connecting frame 18 is curved at the middle portion to avoid interference (collision) with the upper body tilting mechanism 6.

[0033] The support table 4 includes a hip support table 19 for mainly supporting the load of the hips of the person lying on the back (supporting the hips of the person lying on the back from below), an upper body support table 20 for mainly supporting the load of the upper body (above the hips) of the person lying on the back (supporting the upper body of the person lying on the back from below), and a lower body support table for mainly supporting the load of the lower body (below the hips) of the person lying on the back (supporting the lower body of the person lying on the back from below). The lower body support table further includes a thigh support table 21 for mainly supporting the load of the thighs of the person lying on the back (supporting the thighs of the person lying on the back from below) and a calf support table 22 for mainly supporting the load of the calves of the person lying on the back (supporting the calves of the person lying on the back from below).

[0034] The hip support table 19 is horizontally fixed to the upper portion of the substantially central portion of the support table 3 (support table frames 14, 15).

[0035] The upper body support table 20 is tiltable with respect to the support table 3 or the hip support table 19 by being freely pivotable upward and downward at the front end thereof installed to the upper portion of the rear side (rear side of the hip support table 19) of the support table 3 (support table frames 14, 15). The upper body support table 20 is supported on the support table 3 (support table frames 14, 15) by a support mechanism described later and is tiltable upward and downward with respect to the support table frames 14, 15 while being movable forward and rearward along the support table frames 14, 15. In addition, the upper body support table 20 further includes a back support table for mainly supporting the load of the back (spine) below the shoulder (scapula) of the person lying on the back (supporting the back (spine) below the shoulder (scapula) of the person lying on the back from below) and a shoulder support table for mainly supporting the load of the shoulder and the head above the shoulder (scapula) of the person lying on the back (supporting the shoulder and the head above the shoulder (scapula) of the person lying on the back from below).

[0036] The rear end of the thigh portion support table 21 of the lower body support table is freely pivotable up and down and is installed on the upper portion of the front side of the hip portion support table 19 of the support table 3 (support table frames 14, 15). Thus, the thigh portion support table 21 can be tilted with respect to the support table 3 and the hip portion support table 19. In addition, the rear end of the lower leg portion support table 22 of the lower body support table is freely pivotable up and down and is installed on the front end of the thigh portion support table 21. Thus, the lower leg portion support table 22 can be tilted with the thigh portion support table 21 with respect to the support table 3 and the hip portion support table 19, and the lower leg portion support table 22 can also be tilted (freely bent) with respect to the thigh portion support table 21. In addition, the rear end of the lower leg portion support table 22 moves with the front end of the thigh portion support table 21, and the front end of the lower leg portion support table 22 moves along the upper surface of the support table 3 (support table frames 14, 15).

[0037] The lifting mechanism 5 includes a base side moving frame 23 extending along the inner side left-right direction between the middle portions of the base frames 8, 9, which is installed on the base frames 8, 9 so as to be movable forward and backward, and a support table side moving frame 24 extending along the inner side left-right direction between the middle portions of the support table frames 14, 15, which is installed on the support table frames 14, 15 so as to be movable forward and backward. The base side moving frame 23 and the support table side moving frame 24 of the lifting mechanism 5 are supported on the base frames 8, 9 and the support table frames 14, 15, respectively, by a support mechanism described later. The support table side moving frame 24 is bent at the middle portion so as to avoid interference (collision) with the lower body tilting mechanism 7.

[0038] The lifting mechanism 5 includes a pair of left-right cross bars 25, 26, in which the lower ends of the cross bars 25, 26 are spaced left and right and are installed on the connecting frame 13 of the rear side of the base 2 and the base side moving frame 23 so as to be rotatable up and down, and the upper ends of the cross bars 25, 26 are spaced left and right and are installed on the connecting frame 18 of the rear side of the support table 3 and the support table side moving frame 24 so as to be rotatable up and down. The cross bars 25, 26 are connected to each other at the middle portions so as to be rotatable up and down.

[0039] In addition, the lifting mechanism 5 further includes an actuator 27, which is installed between the middle portion of the connecting frame 12 of the front side of the base 2 and the middle portion of the support table side moving frame 24 so as to be rotatable up and down. The actuator 27 includes a motor and a rod, in which the motor end side (base side) is installed on the connecting frame 12 so as to be rotatable up and down, and the rod end side (tip side) is installed on the support table side moving frame 24 so as to be rotatable up and down. The lifting mechanism 5 further includes a protector 28, which is provided below the actuator 27 for protecting the actuator 27 from below (for preventing a force from below from being directly applied to the actuator 27 above). The protector 28 extends horizontally forward and is installed to the lower portion of the connecting frame 12.

[0040] The lifting mechanism 5 can raise and lower the support platform 3 (support platform 4) relative to the base 2 via the rod of the telescopic actuator 27. In addition, the lifting mechanism 5 is only required to raise and lower the support platform 3 (support platform 4) relative to the base 2, and is not limited to the structure described above.

[0041] The upper body tilting mechanism 6 includes a support frame 29 extending laterally to the left and right and curving downwards towards the front in the middle, and support arms 30 and 31 extending upwards and forwards. The support frame 29 is installed between the rear middle portions of the support platform frames 14 and 15, and the support arms 30 and 31 are spaced apart on the left and right sides of the middle portion of the support frame 29. The upper body tilting mechanism 6 also includes a movable member 32 extending in the front-rear direction. The base (front end) of the movable member 32 is rotatably supported between the left and right support arms 30 and 31, and left and right rollers 33 and 34 are rotatably mounted at the end (rear end) of the movable member 32. The left and right rollers 33 and 34 are adjacent to the lower part of the upper body support platform 20 so that they can roll along the upper body support platform 20. The movable member 32 is supported at the ends of the left and right support arms 30 and 31 by the support mechanism described later.

[0042] The upper body tilting mechanism 6 includes a support frame 35 and a support member 36. The support frame 35 is installed between the rear ends of the support platform frames 14 and 15 and extends in the left and right direction. The support member 36 is installed in the middle of the support frame 35 and extends downward.

[0043] Furthermore, the upper body tilting mechanism 6 includes a brake 37, and the actuator 37 is rotatably mounted between the lower front part of the support member 36 and the lower middle part of the movable member 32. The actuator 37 includes a motor and a rod, with the motor end (base side) rotatably mounted on the support member 36 and the rod end (end side) rotatably mounted on the movable member 32. Below the actuator 37 of the upper body tilting mechanism 6, a protective member 38 is provided for protecting the actuator 37 from below (preventing forces from below from being directly applied to the actuator 37 above). The base of the protective member 38 is bent forward and upward in the lower front part of the support member 36, and its end is attached to the middle rear part of the support frame 29.

[0044] Then, as Figure 4 As shown, the upper body tilting mechanism 6 can raise and lower the upper body support platform 20 relative to the support platform 3 via the rod of the telescopic actuator 37. The upper body tilting mechanism 6 is not limited to the above structure; it can be used as long as the upper body support platform 20 can be raised and lowered relative to the support platform 3.

[0045] The lower body tilting mechanism 7 includes a support frame 39 extending in the left-right direction and support arms 40 and 41 extending upward and forward. The support frame 39 is installed between the front sides of the middle portion of the support platform frames 14 and 15, and the support arms 40 and 41 are installed at intervals in the middle portion of the support frame 39. The lower body tilting mechanism 7 also includes a movable member 42 extending in the front-back direction. The base (rear end) of the movable member 42 is rotatably supported vertically between the left and right support arms 40 and 41, and left and right rollers 43 and 44 are rotatably mounted at the end (front end) of the movable member 42. The left and right rollers 43 and 44 are adjacent to the lower part of the thigh support platform 21 so that they can roll along the thigh support platform 21. The movable member 42 is supported at the support arms 40 and 41 by the support mechanism described later.

[0046] The lower body tilting mechanism 7 includes a support frame 45 and a support member 46. The support frame 45 is installed between the rear sides of the middle part of the support platform frames 14 and 15 and extends in the left and right direction. The support member 46 is installed in the middle part of the support frame 45 and extends downward.

[0047] Furthermore, the lower body tilting mechanism 7 includes an actuator 47, which is rotatably mounted between the lower front portion of the support member 46 and the lower rear portion of the movable member 42. The actuator 47 includes a motor and a rod, with the motor end (base side) rotatably mounted on the support member 46 and the rod end (end side) rotatably mounted on the movable member 42. Below the actuator 47 of the lower body tilting mechanism 7, a protective member 48 is provided for protecting the actuator 47 from below (preventing forces from below from being directly applied to the actuator 47 above). The base of the protective member 48 branches left and right at the upper front side and bends, and is mounted on the lower front portion of the support member 46, with its forked ends spaced left and right at the middle rear portion of the support frame 39.

[0048] Then, as Figure 5 As shown, the lower body tilting mechanism 7 can raise and lower the lower body support platform (thigh support platform 21 and calf support platform 22) relative to the support platform 3 via the rod of the telescopic actuator 47. Furthermore, the lower body tilting mechanism 7 is not limited to the above structure; it can be configured as long as the lower body support platform (thigh support platform 21 and calf support platform 22) can be raised and lowered relative to the support platform 3. Alternatively, the actuator 47 can be omitted, and the actuator 37 and movable member 42 of the upper body tilting mechanism 6 can be interlocked together.

[0049] Among the lower body support tables (thigh support table 21 and lower leg support table 22), the base of the thigh support table 21 is tiltable provided on the support table 3, and the base of the lower leg support table 22 is up-and-down bendable provided on the end of the thigh support table 21, so that, when the lower body tilting mechanism 7 is driven, the base of the lower leg support table 22 bends at the base of the thigh support table 21 as the thigh support table 21 tilts. At this time, the end of the lower leg support table 22 is in a free state, and slides along the support table 3 (support table frames 14, 15) and the like by its own weight.

[0050] Therefore, as shown in Figure 6 and Figure 7 When the support table 3 and the support table 4 are lowered to the lowest position with respect to the base 2 to reduce the height (height difference) between the floor 49 and the upper surface of the support table 4, if a protruding member (for example, the caster portion 10, 11) protrudes above the upper surface of the support table 3, the end of the lower leg support table 22 and the protruding member collide with each other, the lower leg support table 22 cannot move smoothly, and the lower leg support table 22 and the protruding member and the like can be damaged.

[0051] Therefore, in the adjustable bed 1 described above, in order to lift the end of the lower leg support table 22 above the protruding member (for example, the caster portion 10, 11) protruding from the base 2 in the state where the support table 3 and the support table 4 are lowest with respect to the base 2, a lower leg support table guide 50 is further provided.

[0052] The lower leg support table guide 50 is installed on the upper surfaces of the left and right support table frames 14, 15 of the support table 3. The lower leg support table guide 50 is formed with an inclined surface 51 that is low in front and high in back at the front end, and a flat surface 52 having the same height at the back.

[0053] The end of the lower leg support table 22 is provided with a slide 53 that slides along the upper surfaces of the support table frames 14, 15 when the thigh support table 21 is raised and tilted, as shown in Figure 8 The slide 53 slides along the inclined surface 51 of the lower leg support table guide 50, so that the end of the lower leg support table 22 is lifted above the protruding member (in this case, the caster portion 10) protruding upward from the base 2, to avoid collision of the lower leg support table 22 with the protruding member (caster portion 10), and then the slide 53 slides along the flat surface 52 of the lower leg support table guide 50 at the same height. When the thigh support table 21 is lowered and flattened, the operation performed is the reverse of that when the thigh support table 21 is raised and tilted. Note that the slide 53 can be a molded product of resin or rubber, as long as it can smoothly move the end of the lower leg support table 22 when the thigh support table 21 tilts, and is not limited to a wheel.

[0054] The upper portion of the lower leg support guide 50 can be accommodated in the recess 54 provided in the lower portion of the lower leg support table 22, and the recess 54 can support the lower leg of the person lying on the upper surface in the state where the support table 3 and the support table 4 are lowered to the lowest position with respect to the base 2. The lower leg support table 22 includes a support frame 55 in the shape of a rectangular frame, and a support surface 56 having flexibility in the shape of a net, which is installed on the upper portion of the support frame 55, and the lower portion of the support surface 56 forms the recess 54. The recess 54 of the lower leg support table 22 can also accommodate the upper portion of the protruding member (here, the caster portion 10, 11) protruding upward from the upper surface of the support table 3 in the state where the support table 3 and the support table 4 are lowered to the lowest position with respect to the base 2. As described above, in the adjustable bed 1, the lower leg support guide 50 and the protruding member (here, the caster portion 10) are accommodated in the recess 54 of the lower leg support table 22 in the state where the support table 3 is lowered to the lowest position with respect to the base 2, so that the height between the support table 4 and the floor 49 can be reduced when the support table 3 is lowered to the lowest position, and the person lying on the adjustable bed 1 can more easily get on and off the adjustable bed 1, and the impact on the body when falling can be reduced.

[0055] Since the above-described lower leg support guide 50 is provided on the upper portion of the support table frame 14, 15 of the support table 3, the slider 53 at the end of the lower leg support table 22 always slides along the lower leg support guide 50 at the time of tilting of the upper leg support table 21 regardless of the lifting state of the support table 3, but is not limited thereto, and the lower leg support guide 50 can also be provided on the above-described protruding member (here, the caster portion 10).

[0056] For example, as Figure 9As shown, the lower leg support platform guide 57 is installed on the front side of the caster portion 10 at the front end of the base frame 8, 9 of the base 2, and a slide 58 that is longer in the lateral direction than the slide 53 is installed at the end of the lower leg support platform 22. According to the lifting state of the support platform 3, when the protruding member protrudes from the upper surface of the support platform 3, and the thigh support platform 21 is tilted, the slide 58 at the end of the lower leg support platform 22 slides along the flat surface 59 of the lower leg support platform guide 57, and then the slide 58 slides along the inclined surface 60 of the lower leg support platform guide 57, whereby the end of the lower leg support platform 22 is lifted above the caster portion 10 that protrudes upward from the base 2 to avoid collision between the lower leg support platform 22 and the caster portion 10, and then the slide 58 slides along the upper end surface 61 of the caster portion 10 at the same height. On the other hand, when the protruding member does not protrude above the upper surface of the support platform 3 (when the support platform 3 is raised to a degree that the protruding member does not protrude above the support platform 3), and the thigh support platform 21 is tilted, the slide 58 at the end of the lower leg support platform 22 slides at the same height along the upper surface of the support platform frame 14, 15. When the thigh support platform 21 is lowered to be flat, the operations performed are the reverse of those when the thigh support platform 21 is raised and tilted. When the lower leg support platform guide 57 is provided on the protruding member in this way, the lower leg support platform 22 does not come into contact with the lower leg support platform guide 57, and the end of the lower leg support platform 22 does not move up and down relative to the support platform frame 14 and 15, except when the support platform 3 is located near the lowest position. Furthermore, instead of providing the slide 58 that is longer in the lateral direction at the end of the lower leg support platform 22 to slide along either the lower leg support platform guide 57 or the support platform frame 14, 15, it is also possible to provide a slide that slides along the lower leg support platform guide 57 and a slide that slides along the support platform frame 14, 15, respectively, at the end of the lower leg support platform 22.

[0057] As described above, in the adjustable bed 1, the base of the thigh support platform 21 for supporting the thighs of a person lying on the back is freely liftable and lowerable on the support platform 3, and the base of the lower leg support platform 22 for supporting the lower legs of the person lying on the back is freely bendable up and down at the end of the thigh support platform 21, so that the base of the lower leg support platform 22 bends at the end of the thigh support platform 21 with tilting of the thigh support platform 21, and when the support platform 3 is lowered to the lowest position relative to the base 2 and the thigh support platform 21 is tilted, the end of the lower leg support platform 22 slides along the lower leg support platform guide 50, 57, which lifts the end of the lower leg support platform 22 above the protruding member such as the caster portion 10, 11 that protrudes upward from the support platform 3 to avoid collision between the end of the lower leg support platform 22 and the protruding member.

[0058] In the adjustable bed 1 having the above-described structure, even in the state in which the support table 3 is lowered to the lowest with respect to the base 2, the lower leg portion support table 22 can be smoothly moved, and damage due to collision between the lower leg portion support table 22 and the protruding member can be prevented.

[0059] In the above-described adjustable bed 1, by lowering the support table 3 to the lowest, the height between the support table 4 and the floor 49 can be made as low as possible, the adjustable bed 1 can be easily adjusted up and down, and the caster portions 10, 11 and the like can be made as large as possible, and the adjustable bed 1 can be easily moved.

[0060] Further, in the adjustable bed 1, the lower leg portion support table guide 50, 57 can be accommodated in the recess 54 provided in the lower portion of the lower leg portion support table 22, and the upper surface of the lower leg portion support table 22 supports the lower leg of the person lying on the back.

[0061] In the adjustable bed 1 having the above-described structure, in the state in which the support table 3 is lowered to the lowest with respect to the base 2, the lower leg portion support table guide 50, 57 is accommodated in the recess 54 of the lower leg portion support table 22, and therefore, even when the lower leg portion support table guide 50, 57 is provided, the height between the support table 4 and the floor 49 can be reduced when the support table 3 is lowered to the lowest.

[0062] Further, in the adjustable bed 1, the lower leg portion support table guide 50 is provided on the support table 3, and the tip end of the lower leg portion support table 22 always slides along the lower leg portion support table guide 50 regardless of the lifting state of the support table 3.

[0063] In the adjustable bed 1 having the above-described structure, the movement of the lower leg portion support table 22, which is interlocked with the inclination of the upper leg portion support table 21, can be made consistent regardless of the lifting state of the support table 3.

[0064] Further, in the adjustable bed 1, the lower leg portion support table guide 57 is provided on the protruding member which protrudes upward from the support table 3 in the state in which the support table 3 is lowered to the lowest with respect to the base 2.

[0065] In the adjustable bed 1 having the above-described structure, even when the protruding member such as the caster portions 10, 11 is changed to a protruding member of a different size, collision between the tip end of the lower leg portion support table 22 and the protruding member can be avoided.

[0066] Further, the tip end of the lower leg portion support table 22 is provided with a slide 58 which slides along the lower leg portion support table guide 57 when the protruding member protrudes upward from the support table 3, and slides along the support table 3 (the support table frames 14, 15) when the protruding member does not protrude upward from the support table 3, according to the lifting state of the support table 3.

[0067] In the adjustable bed 1 having the above structure, only the general slide 58 is provided at the tip of the lower leg support table 22, and regardless of the lifting state of the support table 3, collision between the protruding member and the tip of the lower leg support table 22 can be avoided.

[0068] Further, the protruding member of the adjustable bed 1 is the caster portion 10, 11 on the base 2.

[0069] In the adjustable bed 1 having the above structure, the size of the caster portion 10, 11 can be larger so that the adjustable bed 1 is more easily moved.

Claims

1. An adjustable bed, comprising: A base, a support platform that can be raised and lowered on the base, and a support platform that can be tilted on the support platform, for supporting the body of a person lying horizontally; The support platform includes: a thigh support platform for supporting the thighs of a person lying horizontally; and a calf support platform for supporting the calf of a person lying horizontally. The base of the thigh support platform is freely tilted and set on the support platform, and the base of the calf support platform is freely bent up and down and set at the end of the thigh support platform, so that the base of the calf support platform bends at the end of the thigh support platform as the thigh support platform tilts. The feature is that when the support platform is lowered to its lowest position relative to the base and the thigh support platform is tilted, the end of the calf support platform slides along the calf support platform guide, thereby raising the end of the calf support platform above the protruding part protruding upward from the support platform, thereby avoiding collision between the end of the calf support platform and the protruding part.

2. The adjustable bed according to claim 1, wherein, The lower leg support guide is accommodated in a recess in the lower part of the lower leg support, and the upper surface of the lower leg support can support the lower leg of the person lying horizontally.

3. The adjustable bed according to claim 1 or 2, wherein, The lower leg support guide is installed on the support platform, and regardless of the lifting or lowering state of the support platform, when the thigh support platform is tilted, the end of the lower leg support always slides along the lower leg support guide.

4. The adjustable bed according to claim 1 or 2, wherein, The lower leg support guide is located on the protruding part, which protrudes above the support when the support is lowered to its lowest position relative to the base.

5. The adjustable bed according to claim 4, wherein, The slider is located at the end of the lower leg support platform. When the protruding part protrudes above the support platform according to the lifting state of the support platform, the slider slides along the lower leg support platform guide. When the protruding part does not protrude above the support platform, the slider slides along the support platform.

6. The adjustable bed according to claim 4, wherein, The protruding part is the caster section located on the base.

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