Bed device and control method of bed device

Abstract

To provide a bed device whose convenience is further enhanced.SOLUTION: A bed device in one embodiment comprises: a bed frame; and a bottom unit which is provided on the bed frame and has a back bottom and a head bottom. The head bottom is coupled to the back bottom in a rotatable state from a position where is parallel to the back bottom, in a first direction where the head bottom separates from the bed frame with a first axis extending in a width direction of the bed frame as a center, and in a second direction opposite to the first direction.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a bed apparatus and a method for controlling the bed apparatus. [Background technology]

[0002] 2. Description of the Related Art Conventionally, bed apparatuses have been known that are provided with assist functions such as a back-raising function and a knee-raising function so that users such as the elderly and physically disabled can easily change their posture on the bed apparatus.

[0003] For example, Patent Document 1 discloses a reclining bed that includes a lower frame that is installed in a desired location, an upper frame that is supported by the lower frame, and a reclining means for reclining the upper frame to a desired reclining angle. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2005-230377 A Summary of the Invention [Problem to be solved by the invention]

[0005] Even in light of the tilt-up bed disclosed in Patent Document 1, there is still room for various improvements in terms of deformation of the bed apparatus. For example, one of the demands for this type of bed apparatus is to be able to adjust the head of the user to a desired position.

[0006] Therefore, an object of the present invention is to provide a bed apparatus and a method for controlling the bed apparatus that are more convenient. [Means for solving the problem]

[0007] A bed apparatus according to one embodiment includes a bed frame and a bottom unit provided on the bed frame, the bottom unit having a back bottom and a head bottom. The head bottom is connected to the back bottom so as to be rotatable from a position parallel to the back bottom in both a first direction, which is a direction away from the bed frame, and a second direction, which is a direction opposite to the first direction, about a first axis extending in the width direction of the bed frame.

[0008] The bed apparatus may further include a drive mechanism and a control device configured to control the drive mechanism. The back bottom may be provided on the bed frame so as to be rotatable about a second axis extending in the width direction, and the drive mechanism may be configured to rotate the back bottom and the head bottom, respectively.

[0009] When the head bottom is rotated in the second direction and the back bottom is positioned at a position where the head bottom comes into contact with the bed frame, the control device may control the drive mechanism to rotate the back bottom in a direction away from the bed frame and then rotate the head bottom in the second direction.

[0010] When the control device rotates the back bottom in a direction approaching the bed frame when the back bottom rises up relative to the bed frame and the head bottom rotates in the second direction from a position parallel to the back bottom, the control device may control the drive mechanism to rotate the head bottom in the first direction and then rotate the back bottom in a direction approaching the bed frame before the back bottom reaches a position parallel to the bed frame.

[0011] A method for controlling a bed apparatus according to one embodiment is a method for controlling a bed apparatus including a bed frame and a bottom unit having a back bottom and a head bottom and provided on the bed frame.

[0012] The head bottom is connected to the back bottom so as to be rotatable from a position parallel to the back bottom in both a first direction, which is a direction away from the bed frame, and a second direction, which is a direction opposite to the first direction, about a first axis extending in the width direction of the bed frame. The back bottom is provided on the bed frame so as to be rotatable about a second axis extending in the width direction.

[0013] According to one aspect of the embodiment, the control method of the bed device includes, when rotating the head bottom in the second direction, in a state where the back bottom is positioned at a position where the head bottom and the bed frame come into contact, rotating the back bottom in a direction away from the bed frame, and after rotating the back bottom, rotating the head bottom in the second direction.

[0014] According to another aspect of the embodiment, the control method of the bed device includes, when rotating the back bottom in a direction approaching the bed frame while the back bottom is raised relative to the bed frame and the head bottom is rotated in the second direction from a position parallel to the back bottom, rotating the head bottom in the first direction before the back bottom reaches a position parallel to the bed frame, and after rotating the head bottom, rotating the back bottom in a direction approaching the bed frame. Effect of the Invention

[0015] According to the present invention, it is possible to provide a bed apparatus and a method for controlling the bed apparatus that are more convenient. [Brief description of the drawings]

[0016] [Figure 1] FIG. 1 is a schematic perspective view of a bed apparatus according to one embodiment. [Diagram 2] FIG. 2 is a schematic perspective view of a bed apparatus according to one embodiment. [Diagram 3]FIG. 3 is a schematic perspective view of a bed apparatus according to an embodiment. [Figure 4] FIG. 4 is a schematic plan view of the bed apparatus shown in FIG. [Diagram 5] FIG. 5 is a schematic side view of the bed apparatus shown in FIG. [Figure 6] FIG. 6 is a partial enlarged view showing a part of the bottom unit shown in FIG. [Figure 7] FIG. 7 is a partial enlarged view showing a part of the bottom unit shown in FIG. [Figure 8] FIG. 8 is a schematic block diagram of a bed apparatus according to an embodiment. [Figure 9] FIG. 9 is a diagram for explaining the back adjustment mechanism and the head adjustment mechanism. [Figure 10] FIG. 10 is a diagram for explaining the back adjustment mechanism and the head adjustment mechanism. [Figure 11] FIG. 11 is a diagram for explaining the back adjustment mechanism and the head adjustment mechanism. [Figure 12] FIG. 12 is a flowchart showing an example of the back-raising control by the control device. [Figure 13] FIG. 13 is a flowchart showing an example of the back-lowering control by the control device. [Figure 14] FIG. 14 is a diagram for explaining the movement of the back bottom and the head bottom when lowering the back. [Figure 15] FIG. 15 is a flowchart showing an example of head-raising control by the control device. [Figure 16] FIG. 16 is a flowchart showing an example of head-lowering control by the control device. [Figure 17] FIG. 17 is a diagram for explaining the movements of the back bottom and the head bottom when lowering the head. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] A bed apparatus 100 according to an embodiment of the present invention will be described with reference to the drawings. In the following description, the X, Y and Z directions are defined as shown in the figure. The X direction corresponds to the direction from the head side to the foot side of the bed apparatus 100. The Y direction corresponds to the width direction of the bed apparatus 100. The Z direction corresponds to the height direction of the bed apparatus 100. The side indicated by the Z arrow may be called "upper" or "upper side", and the side opposite to the side indicated by the Z arrow may be called "lower" or "lower side".

[0018] Fig. 1 to Fig. 3 are schematic perspective views of a bed apparatus 100 according to this embodiment. Fig. 4 is a schematic plan view of the bed apparatus 100 shown in Fig. 1. Fig. 5 is a schematic side view of the bed apparatus 100 shown in Fig. 2.

[0019] Figures 6 and 7 are partial enlarged views showing a part of the bottom unit 4 shown in Figure 1. Figure 8 is a schematic block diagram of the bed apparatus 100 according to this embodiment. In Figures 6 and 7, elements that are not related to the bed frame 3 and the bottom unit 4 are appropriately omitted.

[0020] As shown in Figures 1 to 4, the bed device 100 includes a leg frame 1, a base frame 2, a bed frame 3, a bottom unit 4, a drive mechanism 5 (shown in Figure 2), a control device 6 (shown in Figure 4), and an input device 7 (shown in Figure 4).

[0021] The leg frame 1 supports the base frame 2 and the bed frame 3 from below. The leg frame 1 has casters 1a that come into contact with the floor surface, for example, at the four corners of the bed apparatus 100. Note that the leg frame 1 does not necessarily have to have the casters 1a.

[0022] The base frame 2 has a generally rectangular shape that is elongated in the X direction when viewed in the direction opposite to the Z direction. The bed frame 3 is provided on the base frame 2. As shown in Fig. 4, the bed frame 3 has a generally rectangular shape that is elongated in the X direction. In this embodiment, the Y direction corresponds to the width direction of the bed frame 3.

[0023] 4, the bed frame 3 has frame members 31, 33 extending in the X direction, and frame members 35, 37 extending in the Y direction. The bed frame 3 is formed by the frame members 31, 33 and the frame members 35, 37 into a substantially rectangular shape.

[0024] 1 to 3 show a state in which the base frame 2 and the bed frame 3 are closest to the leg frame 1 (floor surface). The base frame 2 and the bed frame 3 can be moved upward from this position by the drive mechanism 5.

[0025] The bottom unit 4 is provided on the bed frame 3. The bottom unit 4 is located, for example, between the frame members 31, 33 of the bed frame 3 in the Y direction. The bottom unit 4 and the frame members 31, 33 of the bed frame 3 define an arrangement surface on which a mattress or the like is arranged. This allows a mattress or the like to be placed on the bottom unit 4.

[0026] The bottom unit 4 has a fixed bottom 11 fixed to the bed frame 3, a waist bottom 12 supporting the waist of the user, a back bottom 13 supporting the back of the user, a head bottom 14 supporting the head of the user, and a leg bottom 15 supporting the legs of the user. Here, the users include not only the elderly and physically disabled, but also able-bodied people. The head bottom 14, back bottom 13, waist bottom 12, fixed bottom 11, and leg bottom 15 are arranged in this order in the X direction.

[0027] 4, the fixed bottom 11 is located approximately in the center in the X direction of the bed apparatus 100. The fixed bottom 11 has frame members 111 and 113 extending in the X direction, and frame members 115 and 117 extending in the Y direction.

[0028] The frame members 115 and 117 are arranged side by side at an interval in the X direction. The frame members 115 and 117 are fixed to the frame members 31 and 33 of the bed frame 3 via the frame members 111 and 113, respectively.

[0029] 6, the fixed bottom 11 further has two connecting members 119a provided on the frame material 115 and two connecting members 119b provided on the frame material 117. The connecting members 119a protrude from the frame material 115 in the direction opposite to the X direction, and the connecting members 119b protrude from the frame material 117 in the X direction.

[0030] 4, the waist bottom 12 has frame members 121, 123 extending in the X direction and frame members 125, 127 extending in the Y direction. The length of the frame members 125, 127 in the Y direction is smaller than the length of the frame members 115, 117 of the fixed bottom 11 in the Y direction. The waist bottom 12 is formed by the frame members 121, 123 and the frame members 125, 127 into a substantially rectangular shape that is elongated in the Y direction.

[0031] 6, the waist bottom 12 further has connecting members 129a, 129b provided at both ends of the frame members 121, 123. The connecting member 129a protrudes from the frame members 125, 127 in the direction opposite to the X-direction, and the connecting member 129b protrudes from the frame members 125, 127 in the X-direction.

[0032] The connecting member 129b is connected to the connecting member 119a of the fixed bottom 11 by a pin member 18 extending in the Y direction. As a result, the waist bottom 12 is connected to the fixed bottom 11 so as to be rotatable around the pin member 18.

[0033] As a result, the hip bottom 12 can rotate about an axis CY1 (shown in FIG. 11) extending in the Y direction relative to the fixed bottom 11. In this embodiment, the axis CY1 corresponds to the second axis. From another perspective, the hip bottom 12 is provided on the bed frame 3 so as to be rotatable about an axis CY2.

[0034] 4, the back bottom 13 has frame members 131, 133 extending in the X direction and frame members 135, 137 extending in the Y direction. The length of the frame members 135, 137 in the Y direction is approximately equal to the length of the frame members 125, 127 of the waist bottom 12 in the Y direction.

[0035] 4, the length in the X direction of the frame materials 131, 133 is greater than the length in the X direction of the frame materials 121, 123 of the waist bottom 12. The back bottom 13 is formed by the frame materials 131, 133 and the frame materials 135, 137 into a substantially rectangular shape that is elongated in the Y direction.

[0036] 6, the back bottom 13 further has connecting members 139a, 139b provided at both ends of the frame members 131, 133. The connecting member 139a protrudes from the frame members 131, 133 in the direction opposite to the X direction, and the connecting member 139b protrudes from the frame members 131, 133 in the X direction.

[0037] The connecting member 139b is connected to the connecting member 129a of the waist bottom 12 by a pin member 18 extending in the Y direction. As a result, the back bottom 13 is connected to the waist bottom 12 so as to be rotatable about the pin member 18.

[0038] As a result, the back bottom 13 can rotate about an axis extending in the Y direction relative to the lumbar bottom 12. From another perspective, the back bottom 13 is provided on the bed frame 3 via the lumbar bottom 12 so as to be rotatable about the axis CY1.

[0039] 4, the head bottom 14 has a substantially U-shaped frame material 141. The length of the head bottom 14 in the Y direction is approximately equal to the lengths of the waist bottom 12 and the back bottom 13 in the Y direction.

[0040] The frame material 141 includes first portions 1411, 1413 extending in the X direction and a second portion 1415 extending in the Y direction. As shown in Fig. 6, the head bottom 14 further has connecting members 143 provided at the ends of the first portions 1411, 1413. The two connecting members 143 protrude from the first portions 1411, 1413 in the X direction.

[0041] The connecting member 143 is connected to the connecting member 139a of the back bottom 13 by a pin member 18 extending in the Y direction. As a result, the head bottom 14 is connected to the back bottom 13 so as to be rotatable around the pin member 18.

[0042] As a result, the head bottom 14 can rotate about an axis CY2 (shown in FIG. 5) extending in the Y direction relative to the back bottom 13. In this embodiment, the axis CY2 corresponds to the first axis. The axes CY1 and CY2 are axes parallel to the Y direction.

[0043] 6, the head bottom 14 further has plates 1451 and 1453 extending from the second portion 1415 toward the frame material 135 of the back bottom 13. The plates 1451 and 1453 are spaced apart in the Y direction. The plates 1451 and 1453 are approximately parallel to the XZ plane defined by the X and Z directions.

[0044] The plates 1451 and 1453 are rotatably connected to connecting members 139c and 139d provided on the frame material 135 of the back bottom 13 around a rod 19 that is long in the Y direction. The rod 19 is located coaxially in the Y direction with a pin member 18 that connects the connecting member 143 and the connecting member 139a.

[0045] In the example shown in Fig. 6, the second portion 1415 of the frame material 141 of the head bottom 14 is adjacent to the frame material 35 of the bed frame 3. The bed frame 3 may further have a plurality of spacers 39. The frame material 141 of the head bottom 14 is in contact with, for example, spacers 39 (for example, two) provided on the upper surface of the frame material 35 of the bed frame 3. In this way, movement of the head bottom 14 from the position shown in Fig. 6 in the opposite direction in the Z direction is restricted.

[0046] The leg bottom 15 has a thigh bottom 16 that supports the thigh of the user, and a knee bottom 17 that supports the knee or calf of the user. The thigh bottom 16 has frame members 161, 163 extending in the X direction, and frame members 165, 167 extending in the Y direction.

[0047] The lengths 165, 167 of the thigh bottom 16 in the Y direction are approximately equal to the lengths in the Y direction of the waist bottom 12 and the back bottom 13. The thigh bottom 16 is formed by the frame members 161, 163 and the frame members 165, 167 into a generally rectangular shape that is long in the Y direction.

[0048] 7, the thigh bottom 16 further has connecting members 169a, 169b provided at both ends of the frame members 161, 163. The connecting member 169a protrudes from the frame members 161, 163 in the direction opposite to the X-direction, and the connecting member 169b protrudes from the frame members 161, 163 in the X-direction.

[0049] The connecting member 169a is connected to the connecting member 119b of the fixed bottom 11 by a pin member 18 extending in the Y direction. This allows the thigh bottom 16 to be connected to the fixed bottom 11 rotatably around the pin member 18. As a result, the thigh bottom 16 can rotate around an axis extending in the Y direction relative to the fixed bottom 11.

[0050] The knee bottom 17 is located closer to the leg of the bed apparatus 100 than the thigh bottom 16. As shown in Fig. 4, the knee bottom 17 has a substantially U-shaped frame member 171 and frame members 175, 177 extending in the Y direction. The length of the knee bottom 17 in the Y direction is approximately equal to the length of the thigh bottom 16 in the Y direction.

[0051] 7, the frame material 171 includes third portions 1711, 1713 extending in the X direction and a fourth portion 1715 extending in the Y direction. The thigh bottom 16 is formed by the third portions 1711, 1713 and the frame materials 175, 177 into a generally rectangular shape that is elongated in the Y direction.

[0052] The knee bottom 17 further has connecting members 179 provided at the ends of the third portions 1711, 1713. The connecting members 179 protrude from the third portions 1711, 1713 in the opposite X-direction.

[0053] The connecting member 179 is connected to the connecting member 169b of the thigh bottom 16 by a pin member 18 extending in the Y direction. As a result, the knee bottom 17 is connected to the thigh bottom 16 so as to be rotatable around the pin member 18.

[0054] 7, the knee bottom 17 is adjacent to the frame material 37 of the bed frame 3, similar to the head bottom 14. The frame material 171 of the knee bottom 17 is in contact with, for example, spacers 39 (for example, two spacers) provided on the upper surface of the frame material 37 of the bed frame 3.

[0055] Support parts 40 (shown in Figure 4) formed in a lattice pattern using wire or other linear material are provided between the frame materials 115, 117 of the fixed bottom 11, between the frame materials 125, 127 of the waist bottom 12, between the frame materials 135, 137 of the back bottom 13, between the frame materials 165, 167 of the thigh bottom 16, and between the frame materials 175, 177 of the knee bottom 17.

[0056] 1, the head bottom 14, the back bottom 13, the waist bottom 12, the fixed bottom 11, the thigh bottom 16 and the knee bottom 17 are all horizontally aligned. In other words, the bottom unit 4 is parallel to the bed frame 3.

[0057] Here, "parallel" also includes a case where the bottom unit 4 is slightly tilted (by a few degrees) with respect to the bed frame 3. From another perspective, the bottom unit 4 is parallel to the XY plane defined by the X direction and the Y direction.

[0058] In FIG. 2, the hip bottom 12 and the back bottom 13 rise in the Z direction relative to the bed frame 3, and the thigh bottom 16 rises in the Z direction relative to the fixed bottom 11.

[0059] Furthermore, the head bottom 14 is bent in a direction away from the bed frame 3 relative to the back bottom 13 , and the knee bottom 17 is bent in a direction toward the bed frame 3 relative to the thigh bottom 16 .

[0060] In Fig. 3, the waist bottom 12 and the back bottom 13 rise in the Z direction relative to the bed frame 3, and the head bottom 14 bends relative to the back bottom 13 in a direction approaching the bed frame 3. Specifically, the back bottom 13 rises to a specified angle, which will be described later. The leg bottom 15 is parallel to the bed frame 3.

[0061] In the example shown in Fig. 2, the back bottom 13 is raised most relative to the bed frame 3, and the thigh bottom 16 is raised most relative to the bed frame 3. The back bottom 13 and the thigh bottom 16 are deformable between the position shown in Fig. 1 and the position shown in Fig. 2.

[0062] As described above, the head bottom 14 is rotatably connected to the back bottom 13. Specifically, as shown in Fig. 5, the head bottom 14 is rotatable in a first direction D1 about an axis CY2 from a position PP parallel to the back bottom 13, and is rotatable in a second direction D2 about the axis CY2 from a position PP parallel to the back bottom 13. Here, the parallel position PP also includes a case where the head bottom 14 is slightly inclined (by a few degrees) in the first direction D1 or the second direction D2 with respect to the back bottom 13.

[0063] Here, the first direction D1 corresponds to a direction away from the bed frame 3, and the second direction D2 corresponds to a direction opposite to the first direction D1. When viewed in the Y direction, the first direction D1 corresponds to a clockwise direction around the axis CY2, and the second direction D2 corresponds to a counterclockwise direction around the axis CY2.

[0064] In addition, the position where the head bottom 14 is rotated the most in the first direction D1 from the position PP parallel to the back bottom 13 is called the first position P1, and the position where the head bottom 14 is rotated the most in the second direction D2 from the position PP is called the second position P2. The head bottom 14 is deformable between the first position P1 and the second position P2.

[0065] In the following description, the action of rotating the back bottom 13 in a direction away from the bed frame 3 as shown in Fig. 2 is referred to as "back raising," and the action of rotating the back bottom 13 in a direction toward the bed frame 3 is referred to as "back lowering." In addition, the action of rotating the head bottom 14 in a first direction D1 around the axis CY2 is referred to as "head raising," and the action of rotating the head bottom 14 in a second direction D2 around the axis CY2 is referred to as "head lowering."

[0066] Next, the drive mechanism 5 will be described.

[0067] The drive mechanism 5 supports the bottom unit 4 and deforms the bottom unit 4 into various shapes. As shown in Fig. 5, the drive mechanism 5 includes a back-raising arm 51, a leg-raising arm 53, and a pair of links 55, 57 as elements for supporting the bottom unit 4.

[0068] The back-raising arm 51 supports the underside of the back bottom 13. The leg-raising arm 53 supports the underside of the thigh bottom 16. A pair of links 55, 57 support the knee bottom 17 rotatably.

[0069] 4, the drive mechanism 5 further includes a lifting mechanism 61, a back adjustment mechanism 63, a leg adjustment mechanism 65, and a head adjustment mechanism 67. The lifting mechanism 61 has a lifting motor M1, the back adjustment mechanism 63 has a back motor M3, the leg adjustment mechanism 65 has a leg motor M5, and the head adjustment mechanism 67 has a leg motor M5. The lifting motor M1, the back motor M3, the leg motor M5, and the leg motor M5 are examples of power sources of the drive mechanism 5.

[0070] The lift motor M1, back motor M3, leg motor M5, and head motor M7 include sensors S1, S3, S5, and S7 (shown in FIG. 8). The sensors S1, S3, S5, and S7 detect, for example, the protrusion amount (stroke) of a rod described below. The sensors S1, S3, S5, and S7 are, for example, Hall sensors, but are not limited to this example.

[0071] The lifting mechanism 61 is configured to be able to lift and lower the base frame 2 and the bed frame 3 relative to the leg frame 1. The back adjustment mechanism 63 is configured to be able to rotate the back bottom 13 relative to the bed frame 3.

[0072] The leg adjustment mechanism 65 is configured to be able to rotate the thigh bottom 16 relative to the bed frame 3. The head adjustment mechanism 67 is configured to be able to rotate the head bottom 14 relative to the back bottom 13. The bed apparatus 100 is capable of transforming the bottom unit 4 into various shapes by these drive mechanisms 5.

[0073] The control device 6 is configured to be able to control the drive mechanism 5 in response to a command input from the input device 7. In the example shown in Fig. 4, the control device 6 is located on the back side of the fixed bottom 11, but is not limited to this example.

[0074] The control device 6 includes, for example, a processor, a memory, etc. The control device 6 is communicatively connected to the lift motor M1, the back motor M3, the leg motor M5, and the leg motor M6 of the drive mechanism 5 via, for example, a cord (not shown), as shown in Fig. 8. However, these elements may be connected wirelessly.

[0075] The control device 6 executes the computer programs read into the memory, and acquires various information (data) required for the execution of these programs from the sensors S1, S3, S5, and S7. The control device 6 performs predetermined calculation processing according to the acquired information, thereby performing deformation of the bottom unit 4 in the bed apparatus 100, etc. In addition, the control device 6 stores in advance judgment values, stop conditions, etc., which will be explained using the flowcharts in Fig. 12 and subsequent figures.

[0076] As shown in Fig. 8, the control device 6 is communicatively connected to the input device 7 via, for example, a cord 7a (shown in Fig. 4). However, this connection may be wireless. The input device 7 is, for example, a remote controller.

[0077] The input device 7 has, for example, a plurality of buttons. The plurality of buttons includes at least one button for inputting a command for transforming the bottom unit 4, at least one button for inputting a command for raising and lowering the base frame 2 and the bed frame 3, etc.

[0078] Buttons for inputting commands to transform the bottom unit 4 include, for example, a back-raising button 71 corresponding to raising the back, a back-lowering button 73 corresponding to lowering the back, a head-raising button 75 corresponding to raising the head, and a head-lowering button 77 corresponding to lowering the head.

[0079] The input device 7 may further include a display unit (e.g., a display). The display unit displays, for example, the state of the bed apparatus 100. The state of the bed apparatus 100 includes angle information of the back bottom 13, the head bottom 14, and the thigh bottom 16. The input device 7 may be defined as including other elements in addition to the above components.

[0080] Next, the back adjustment mechanism 63 and the head adjustment mechanism 67 of the drive mechanism 5 will be described.

[0081] 9 to 11 are diagrams for explaining the back adjustment mechanism 63 and the head adjustment mechanism 67. Fig. 10 and Fig. 11 show the bed apparatus 100 viewed in the Y direction. In these diagrams, elements that are not related to the back adjustment mechanism 63 and the head adjustment mechanism 67 are omitted as appropriate. In Fig. 9 and Fig. 10, the bottom unit 4 (lumbar bottom 12, back bottom 13, and head bottom 14) is parallel to the bed frame 3.

[0082] First, the back adjustment mechanism 63 will be described.

[0083] 9, the back-raising arm 51 has a back-raising shaft 511 extending in the Y direction, and long support members 513, 515 connected to the back-raising shaft 511. The back-raising shaft 511 is rotatably connected to brackets 1151, 1153 extending from the frame material 115 of the fixed bottom 11. Specifically, the back-raising shaft 511 is connected to the brackets 1151, 1153 rotatably about an axis extending in the Y direction.

[0084] Rails 1301 and 1303 are provided on the back surface of the back bottom 13. The rails 1301 and 1303 extend along the X direction and are positioned so as to sandwich the support members 513 and 515. Rollers R1 (shown in FIG. 10) are provided on the outer surfaces of the support members 513 and 515, respectively. For example, two rollers R1 are provided.

[0085] The roller R1 is located inside the rails 1301 and 1303. The back bottom 13 is supported by the rails 1301 and 1303 and the roller R1 so as to be slidable relative to the support members 513 and 515.

[0086] The back motor M3 is provided with a cylindrical cylinder 631 and a rod 633 housed in the cylinder 631. The amount of protrusion of the rod 633 from the cylinder 631 changes with the operation of the back motor M3.

[0087] The back motor M3 is rotatably connected to a bracket 1171 provided on the frame material 117 of the fixed bottom 11. The tip of the rod 633 is rotatably connected to a bracket 517 provided on the back-raising shaft 511.

[0088] The support members 513, 515 are parallel to the X direction in Fig. 10. When the rod 633 is sent out from the cylinder 631 by the back motor M3 at the position shown in Fig. 10, the back-raising shaft 511 rotates via the bracket 517. As a result, the support members 513, 515 rotate around the back-raising shaft 511 and rise up, as shown in Fig. 11.

[0089] As described above, the back bottom 13 is supported by the back-raising arm 51. When the position of the back-raising arm 51 changes from the position shown in Fig. 10 to the position shown in Fig. 11, the back bottom 13 rises up relative to the bed frame 3 while rotating around the axis CY1 via the waist bottom 12.

[0090] The leg adjustment mechanism 65 is configured, for example, in the same manner as the back adjustment mechanism 63. The leg motor M5 is provided with a cylindrical cylinder and a rod housed in the cylinder, neither of which is shown.

[0091] The amount of protrusion of the rod from the cylinder changes with the operation of the leg motor M5. When the leg motor M5 sends the rod out of the cylinder, the position of the knee lifting arm 53 changes, and the thigh bottom 16 rises up relative to the bed frame 3 while rotating around an axis extending in the Y direction via the waist bottom 12. At this time, the knee bottom 17 bends relative to the thigh bottom 16.

[0092] Next, the head adjustment mechanism 67 will be described.

[0093] The head motor M7 is provided with a cylindrical cylinder 671 and a rod 673 housed in the cylinder 671. The amount of projection of the rod 673 from the cylinder 671 changes with the operation of the head motor M7.

[0094] The head motor M7 is rotatably connected to a bracket 1371 provided on the frame material 137 of the back bottom 13. The tip of the rod 673 is rotatably connected to a bracket 147 provided on the second portion 1415 of the frame material 141 of the head bottom 14.

[0095] In Fig. 10, the head bottom 14 is located at position PP. As shown in Fig. 11, when the rod 673 is sent out from the cylinder 671 by the head motor M7 at position PP, the head bottom 14 rotates in the first direction D1 via the bracket 147. When the protruding amount of the rod 673 becomes the largest, the head bottom 14 is deformed to the first position P1.

[0096] When the rod 673 is returned to the cylinder 671 by the head motor M7 at the position PP, the head bottom 14 rotates in the second direction D2 via the bracket 147. When the protruding amount of the rod 673 becomes the smallest, the head bottom 14 deforms to the second position P2. That is, when the protruding amount of the rod 673 is increased, the head bottom 14 rotates in the first direction D1, and when the protruding amount of the rod 673 is decreased, the head bottom 14 rotates in the second direction D2.

[0097] The angle at which the head bottom 14 can be rotated from the position PP in the first direction D1 is smaller than the angle at which the head bottom 14 can be rotated from the position PP in the second direction D2. The angle at which the head bottom 14 can be rotated from the position PP in the first direction D1 is, for example, a maximum of 45 degrees, and the angle at which the head bottom 14 can be rotated from the position PP in the second direction D2 is, for example, a maximum of 15 degrees, but is not limited to these angles.

[0098] Next, a method for controlling the bed apparatus 100 by the control device 6 will be described. The operations shown in the flowcharts in Fig. 12 and subsequent figures are executed by the control device 6 controlling the back adjustment mechanism 63 and the head adjustment mechanism 67. The user can adjust the back bottom 13 and the head bottom 14 to desired positions by operating the input device 7.

[0099] [Back Raising] FIG. 12 is a flow chart showing an example of the back-raising control by the control device 6. In FIG.

[0100] First, when the user presses the back-raising button 71, the control device 6 checks the position of the back bottom 13 (step S101). Specifically, the control device 6 causes the sensor S3 (shown in FIG. 8) of the back adjustment mechanism 63 to acquire the protruding amount of the rod 633 of the back motor M3.

[0101] This allows the control device 6 to confirm the position of the back bottom 13 based on the acquired protrusion amount. Here, the position of the back bottom 13 corresponds to, for example, the angle of the back bottom 13 with respect to the bed frame 3 centered on the axis CY1.

[0102] Next, the control device 6 determines whether or not the back can be raised (step S102). The control device 6 determines whether or not the back can be raised by, for example, comparing the acquired protrusion amount of the rod 633 of the back motor M3 with a determination value.

[0103] The determination value in step S102 is, for example, the amount of protrusion of the rod 633 at the most elevated position (shown in FIG. 2) of the back bottom 13 relative to the bed frame 3. Specifically, the determination value in step S102 corresponds to the maximum amount of protrusion of the rod 633. However, the determination value in step S102 may be determined as a predetermined range including the maximum amount of protrusion of the rod 633, for example.

[0104] For example, the control device 6 determines that the back can be raised when the protruding amount of the rod 633 is smaller than the judgment value, and determines that the back cannot be raised when the protruding amount of the rod 633 is the judgment value.

[0105] When the control device 6 determines that the back cannot be raised (step S102 No), the control device 6 does not raise the back. When the control device 6 determines that the back can be raised (step S102 Yes), the control device 6 controls the back motor M3 to increase the protruding amount of the rod 633. This causes the bed apparatus 100 to raise the back (step S103).

[0106] Next, the control device 6 judges whether or not a stop condition is satisfied (step S104). The stop condition is, for example, when the protrusion amount of the rod 633 reaches a maximum value, when the pressing of the back-raising button 71 is stopped, when the stop button is pressed, etc.

[0107] When the stop condition is not met (step S104: No), the control device 6 continues the back-raising (step S103). When the stop condition is met (step S104: Yes), the control device 6 stops the back-raising (step S105).

[0108] [Lower back] FIG. 13 is a flow chart showing an example of the back-lowering control by the control device 6. In FIG.

[0109] First, when the back lowering button 73 is pressed by a user, the control device 6 checks the position of the back bottom 13 (step S201). This step S201 is performed in the same manner as step S101 shown in FIG.

[0110] Next, the control device 6 checks the position of the head bottom 14 (step S202). Specifically, the control device 6 causes the sensor S7 (shown in FIG. 8) of the head adjustment mechanism 67 to acquire the protrusion amount of the rod 673 of the head motor M7.

[0111] This allows the control device 6 to confirm the position of the head bottom 14 based on the acquired protrusion amount. Here, the position of the head bottom 14 corresponds to, for example, the angle of the head bottom 14 with respect to the back bottom 13 centered on the axis CY2. Note that step S202 may be executed before step S201.

[0112] Next, the control device 6 judges whether the back can be lowered (step S203). The control device 6 judges whether the back can be lowered by, for example, comparing the acquired protrusion amount of the rod 633 of the back motor M3 with a judgment value.

[0113] The determination value in step S203 is, for example, the protrusion amount of the rod 633 at a position (shown in FIG. 1) where the back bottom 13 is parallel to the bed frame 3. Specifically, the determination value in step S203 corresponds to the minimum value of the protrusion amount of the rod 633. However, the determination value in step S203 may be determined as a predetermined range including the minimum value of the protrusion amount of the rod 633, for example.

[0114] For example, the control device 6 determines that the back can be lowered when the protruding amount of the rod 633 is greater than the judgment value, and determines that the back cannot be lowered when the protruding amount of the rod 633 is equal to the judgment value. Here, being able to lower the back corresponds to a state in which the back bottom 13 is raised up relative to the bed frame 3.

[0115] When the control device 6 determines that the back can not be lowered (step S203 No), the control device 6 does not execute the back lowering. When the control device 6 determines that the back can be lowered (step S203 Yes), the control device 6 controls the back motor M3 to reduce the protruding amount of the rod. This causes the back to be lowered in the bed apparatus 100 (step S204).

[0116] Next, the control device 6 judges whether or not a stop condition is satisfied (step S205). The stop condition is, for example, when the pressing of the back lowering button 73 is stopped, when the stop button is pressed, and the like.

[0117] When the stop condition is satisfied (Yes in step S205), the control device 6 stops the lowering of the back (step S211). When the stop condition is not satisfied (No in step S205), the control device 6 determines whether the back bottom 13 has reached a specified angle (step S206).

[0118] The control device 6 determines whether the back bottom 13 has reached a specified angle by, for example, comparing the protruding amount of the rod 633 of the back motor M3 acquired from the sensor S3 with a determination value.

[0119] The determination in step S206 is performed before the back bottom 13 reaches a position parallel to the bed frame 3. The specified angle is an angle at which the frame material 35 of the bed frame 3 and the head bottom 14 do not come into contact with each other when the head bottom 14 is located at the second position P2, for example.

[0120] In one example, the specified angle is less than half the angle of the back bottom 13 relative to the bed frame 3 when the back bottom 13 is at the most elevated position. At the specified angle, the back bottom 13 is elevated about 5 degrees relative to the bed frame 3 around the axis CY1, for example, but is not limited to this angle.

[0121] When the control device 6 determines that the back bottom 13 has not reached the specified angle (step S206 No), the control device 6 continues lowering the back (step S204). When the control device 6 determines that the back bottom 13 has reached the specified angle (step S206 Yes), the control device 6 determines whether the head bottom 14 has rotated from the position PP in the second direction D2 (step S207).

[0122] The control device 6 judges whether the head bottom 14 has rotated in the second direction D2 from the position PP by, for example, comparing the protruding amount of the rod 673 of the head motor M7 acquired in step S202 with a judgment value. The judgment value in step S206 is, for example, the protruding amount of the rod 673 at the position PP of the head bottom 14.

[0123] For example, when the amount of protrusion of the rod 673 is smaller than a judgment value, the control device 6 determines that the head bottom 14 has rotated from position PP in the second direction D2, and when the amount of protrusion of the rod 673 is equal to or greater than the judgment value, the control device 6 determines that the head bottom 14 has not rotated from position PP in the second direction D2.

[0124] When the control device 6 determines that the head bottom 14 has not rotated from the position PP in the second direction D2 (step S207 No), the back motor M3 reduces the protruding amount of the rod 633. This causes the back of the bed apparatus 100 to lower (step S209).

[0125] When the control device 6 determines that the head bottom 14 has rotated from the position PP in the second direction D2 (Yes in step S207), it causes the head motor M7 to increase the protruding amount of the rod 673 and executes head lifting (step S208).

[0126] In step S208, the control device 6 causes the head motor M7 to increase the protruding amount of the rod 673, for example, until the head bottom 14 reaches position PP. When the head bottom 14 reaches position PP, the control device 6 stops the head motor M7. Then, the control device 6 causes the back motor M3 to decrease the protruding amount of the rod 633. This causes the back lowering of the bed apparatus 100 to be performed again (step S209).

[0127] Next, the control device 6 determines whether or not a stop condition is satisfied (step S210). The stop condition is, for example, when the protruding amount of the rod 633 becomes a minimum value, when the pressing of the back-lowering button 73 is stopped, when the stop button is pressed, etc.

[0128] When the stop condition is not met (step S210: No), the control device 6 continues the back lowering (step S209). When the stop condition is met (step S210: Yes), the control device 6 stops the back lowering (step S211).

[0129] Fig. 14 is a diagram for explaining the movement of the back bottom 13 and the head bottom 14 during the back lowering. The back bottom 13 reaches a specified angle through step S204. In the example shown in Fig. 14, the head bottom 14 rotates from the position PP in the second direction D2 (for example, the second position P2).

[0130] If the back bottom 13 is further rotated from this position in a direction approaching the bed frame 3, the frame material 141 of the head bottom 14 comes into contact with the spacer 39 of the bed frame 3. Further rotating the back bottom 13 from this state may cause damage to the bed apparatus 100.

[0131] As described using the flowchart shown in FIG. 13, when the head bottom 14 is rotated from the position PP in the second direction D2, the head lifting is executed through steps S207 and S208.

[0132] The control device 6 causes the head motor M7 to increase the protruding amount of the rod 673, for example, until the head bottom 14 reaches position PP. This makes it possible to prevent the frame material 141 of the head bottom 14 from coming into contact with the spacer 39 of the bed frame 3 before the back bottom 13 reaches a position parallel to the bed frame 3. After that, through step S209, the back can be lowered to a position parallel to the bed frame 3.

[0133] As shown in FIG. 14, when the back bottom 13 reaches a specified angle, a gap G1 is formed between the head bottom 14 and the spacer 39 of the frame material 35 at the second position P2.

[0134] A distance H1 in the Z direction between the frame material 141 of the head bottom 14 and the spacer 39 at the second position P2 is, for example, greater than the length in the Z direction of the frame material 141 of the head bottom 14. When the frame material 141 of the head bottom 14 is cylindrical, the length in the Z direction corresponds to the diameter of the frame material 141. When the spacer 39 is not provided, the distance H1 corresponds to the distance between the frame material 141 of the head bottom 14 and the frame material 35.

[0135] [Head up] FIG. 15 is a flowchart showing an example of head-raising control by the control device 6.

[0136] First, when the user presses the head lift button 75, the control device 6 checks the position of the head bottom 14 (step S301). This step S301 is performed in the same manner as step S202 shown in FIG.

[0137] Next, the control device 6 determines whether or not the head can be raised (step S302). The control device 6 determines whether or not the head can be raised, for example, by comparing the acquired protrusion amount of the rod 673 of the head motor M7 with a determination value.

[0138] The determination value in step S302 is, for example, the protrusion amount of the rod 673 at the first position P1 of the head bottom 14. Specifically, the determination value in step S302 corresponds to the maximum protrusion amount of the rod 673. However, the determination value in step S302 may be determined as a predetermined range including the maximum protrusion amount of the rod 673, for example.

[0139] For example, the control device 6 determines that head lifting is possible when the protruding amount of the rod 673 is smaller than the judgment value, and determines that head lifting is not possible when the protruding amount of the rod 673 is the judgment value.

[0140] When the control device 6 determines that the head raising is not possible (step S302 No), the control device 6 does not perform the head raising. When the control device 6 determines that the head raising is possible (step S302 Yes), the control device 6 causes the head motor M7 to increase the protruding amount of the rod 673. This causes the head raising in the bed apparatus 100 to be performed (step S303).

[0141] Next, the control device 6 judges whether or not a stop condition is satisfied (step S304). The stop condition is, for example, when the protrusion amount of the rod 673 reaches a maximum value, when the pressing of the head raising button 75 is stopped, when the stop button is pressed, etc.

[0142] When the stop condition is not satisfied (step S304: No), the control device 6 continues the head-lifting (step S303). When the stop condition is satisfied (step S304: Yes), the control device 6 stops the head-lifting (step S305).

[0143] [Bow] FIG. 16 is a flow chart showing an example of head-lowering control by the control device 6.

[0144] First, the control device 6 checks the position of the back bottom 13 (step S401). This step S402 is performed in the same manner as step S101 shown in FIG.

[0145] Next, the control device 6 determines whether the back bottom 13 is in an appropriate position to rotate the head bottom 14 in the second direction D2 (step S402). The control device 6 determines whether the back bottom 13 is in an appropriate position, for example, by comparing the acquired protrusion amount of the rod 633 of the back motor M3 with a judgment value.

[0146] The judgment value in step S402 is, for example, the protruding amount of the rod 633 at a specified angle, as described with reference to Fig. 13. The protruding amount of the rod 633 being equal to or less than the judgment value includes not only a state in which the back bottom 13 is parallel to the bed frame 3, but also a state in which the back bottom 13 is in a position where the head bottom 14 comes into contact with the bed frame 3 when the head bottom 14 is rotated in the second direction D2 to the second position P2.

[0147] For example, when the amount of protrusion of the rod 633 is greater than a judgment value, the control device 6 judges that the position is appropriate, and when the amount of protrusion of the rod 633 is equal to or less than the judgment value, the control device 6 judges that the position is not appropriate.

[0148] When the control device 6 determines that the back bottom 13 is in the appropriate position (Yes in step S402), it causes the head motor M7 to reduce the protruding amount of the rod 673. This causes the head lowering in the bed apparatus 100 to be performed (step S404).

[0149] When the control device 6 determines that the back bottom 13 is not in an appropriate position (No in step S402), it causes the back motor M3 to increase the protruding amount of the rod 633, thereby performing back raising (step S403).

[0150] The control device 6 causes the back motor M3 to increase the protruding amount of the rod 633 until the back bottom 13 reaches the specified angle described with reference to Fig. 13. However, the specified angle for the head lowering may be different from the specified angle for the back lowering. When the back bottom 13 reaches the specified angle, the control device 6 stops the back motor M3.

[0151] Next, the control device 6 controls the head motor M7 to reduce the amount of protrusion of the rod 673. This causes the head lowering of the bed apparatus 100 to be performed (step S404). Next, the control device 6 determines whether or not a stop condition is met (step S405). The stop condition is, for example, when the amount of protrusion of the rod 673 becomes a minimum value, when the pressing of the head lowering button 77 is stopped, when the stop button is pressed, etc.

[0152] If the stop condition is not met (step S405: No), the control device 6 continues the head lowering (step S404). If the stop condition is met (step S405: Yes), the control device 6 stops the head lowering (step S406).

[0153] 17 is a diagram for explaining the movement of the back bottom 13 and the head bottom 14 in the head lowering. For example, the back bottom 13 reaches a specified angle from a position parallel to the bed frame 3 through step S403.

[0154] As shown in FIG. 17, when the back bottom 13 reaches a specified angle, a gap G2 is formed between the head bottom 14 and the spacer 39 of the frame material 35 at the position PP.

[0155] The distance H2 in the Z direction between the frame material 141 of the head bottom 14 and the spacer 39 at the position PP is greater than the distance H1 described with reference to Fig. 14. The distance H2 is a distance at which the head bottom 14 and the spacer 39 do not come into contact with each other when the head bottom 14 is rotated to the second position P2.

[0156] The head bottom 14 is rotated in the second direction D2 through step S404. As shown in Fig. 17, the head bottom 14 forms a gap between itself and the frame material 35 at the second position P2. This gap corresponds to the gap G1 described with reference to Fig. 14.

[0157] The specified angle may be determined so that the head bottom 14 comes into contact with the spacer 39 when the head bottom 14 is rotated to the second position P2. In this case, the gap G1 is not formed. This allows the head bottom 14 to be supported by the bed frame 3, making it possible to stabilize the head bottom 14.

[0158] The bed apparatus 100 configured as above can further improve the convenience as described below. Specifically, the head bottom 14 of the bed apparatus 100 is connected to the back bottom 13 so as to be rotatable in both the first direction D1 and the second direction D2 from a position PP parallel to the back bottom 13.

[0159] This allows a wider range of motion for the bottom unit 4 compared to a case where the head bottom 14 can be rotated only in one of the first direction D1 or the second direction D2 from the position PP parallel to the back bottom 13. As a result, the user can adjust the head bottom 14 to a desired position, further improving the convenience of the bed apparatus 100.

[0160] Such deformation of the head bottom 14 can be useful in assisting the user's movements. For example, by rotating the head bottom 14 from the position PP in the first direction D1, the head bottom 14 is inclined forward of the back bottom 13, and the user can easily take a position for reading or watching television. In addition, by rotating the head bottom 14 from the position PP in the second direction D2, the user can easily secure the airway. Furthermore, by rotating the head bottom 14 from the position PP in the second direction D2 or from the position PP in the first direction D1, a stretching effect can be given to the user's neck and surrounding areas.

[0161] Next, assume that when the head bottom 14 is rotated in the second direction D2, the back bottom 13 is positioned at a position where the head bottom 14 comes into contact with the bed frame 3, and the head bottom 14 is rotated in the second direction D2.

[0162] In such a case, the control device 6 of the bed device 100 controls the back adjustment mechanism 63 and the head adjustment mechanism 67 to rotate the back bottom 13 in a direction away from the bed frame 3, and then to rotate the head bottom 14 in the second direction D2.

[0163] By performing the head lowering procedure in this manner, the burden on the user's neck and surrounding areas can be reduced compared to when the head bottom 14 is rotated in the second direction D2 from a position in which the back bottom 13 is parallel to the bed frame 3.

[0164] For example, when sleeping, by rotating the head bottom 14 from the position PP in the second direction D2 after lifting the back, the airway can be easily secured and the user's breathing can be promoted. As a result, the occurrence of snoring by the user can be suppressed. In this case, by reducing the elevation of the back bottom 13 relative to the bed frame 3 (reducing the specified angle), the user's sleep is less likely to be disturbed even when the back is lifted.

[0165] Next, assume that the back bottom 13 rises up relative to the bed frame 3 and the head bottom 14 rotates from a position PP parallel to the back bottom 13 in the second direction D2, and then the back bottom 13 is rotated in a direction approaching the bed frame 3.

[0166] In such a case, when the back bottom 13 reaches a specified angle before the back bottom 13 reaches a position parallel to the bed frame 3, the control device 6 of the bed apparatus 100 controls the back adjustment mechanism 63 and the head adjustment mechanism 67 to rotate the head bottom 14 in the first direction D1 and then rotate the back bottom 13 in a direction approaching the bed frame 3. With this procedure, the back is lowered to lower the center of gravity of the user and then the head is raised, thereby reducing the burden on the user's neck and surrounding areas.

[0167] Furthermore, when the back adjustment mechanism 63 and the head adjustment mechanism 67 are not controlled by the control device 6 as described above, the user needs to check the position of the head bottom 14 before lowering the back in order to avoid contact between the bed frame 3 and the head bottom 14. When the head bottom 14 has rotated from the position PP in the second direction D2, the user needs to rotate the head bottom 14 in the first direction D1.

[0168] In contrast, in this embodiment, when the back bottom 13 reaches a specified angle before the back bottom 13 reaches a position parallel to the bed frame 3, the control device 6 goes through steps S207 and S208 (shown in Figure 13) to rotate the head bottom 14 in the first direction D1 and then executes back lowering.

[0169] That is, the user can lower the back regardless of the position of the head bottom 14. In other words, the user does not need to check the position of the head bottom 14 in advance or rotate the head bottom 14 in the first direction D1, improving the convenience of the bed apparatus 100. In addition, various other preferable effects can be obtained from this embodiment.

[0170] In this embodiment, the back bottom 13 and the head bottom 14 are respectively controlled by the back adjustment mechanism 63 and the head adjustment mechanism 67. This allows the head bottom 14 to be adjusted to a position desired by the user according to the position of the back bottom 13.

[0171] In the flowcharts shown in Figures 12, 13, 15 and 16, an example has been described in which the protrusion amount of the rod 633 of the back motor M3 and the protrusion amount of the rod 673 of the head motor M7 are used as the judgment value, but the angle of the back bottom 13 relative to the bed frame 3 and the angle of the head bottom 14 relative to the back bottom 13 may also be used as the judgment value, or other criteria may also be applied.

[0172] The scope of the present invention is not limited to the configurations disclosed in the present embodiment, and the present invention can be implemented by modifying the configurations disclosed in the present embodiment in various ways. [Explanation of symbols]

[0173] 100...bed device, 1...leg frame, 2...base frame, 3...bed frame, 4...bottom unit, 5...drive mechanism, 6...control device, 7...input device, 11...fixed bottom, 12...waist bottom, 13...back bottom, 14...head bottom, 63...back adjustment mechanism, 67...head adjustment mechanism.

Claims

1. Bed frame and A bottom unit is provided on the bed frame and has a back bottom and a head bottom, The head bottom is connected to the back bottom so as to be rotatable from a position parallel to the back bottom in both a first direction in which the head bottom is a direction away from the bed frame and a second direction in which the head bottom is a direction opposite to the first direction, about a first axis extending in the width direction of the bed frame. Bed equipment.

2. A drive mechanism; A control device configured to be able to control the drive mechanism, The back bottom is provided on the bed frame so as to be rotatable around a second axis extending in the width direction, The drive mechanism is configured to be able to rotate the back bottom and the head bottom, When the head bottom is rotated in the second direction and the back bottom is positioned at a position where the head bottom contacts the bed frame, the control device controls the drive mechanism to rotate the back bottom in a direction away from the bed frame and then rotate the head bottom in the second direction when the head bottom is rotated in the second direction. The bed apparatus according to claim 1.

3. A drive mechanism; A control device configured to be able to control the drive mechanism, The back bottom is provided on the bed frame so as to be rotatable around a second axis extending in the width direction, The drive mechanism is configured to be able to rotate the back bottom and the head bottom, When the back bottom is rotated in a direction approaching the bed frame in a state in which the back bottom rises up relative to the bed frame and the head bottom is rotated in the second direction from a position parallel to the back bottom, the control device controls the drive mechanism to rotate the head bottom in the first direction and then rotate the back bottom in a direction approaching the bed frame before the back bottom reaches a position parallel to the bed frame. The bed apparatus according to claim 1.

4. A method for controlling a bed apparatus including a bed frame and a bottom unit having a back bottom and a head bottom and provided on the bed frame, comprising: The head bottom is connected to the back bottom so as to be rotatable from a position parallel to the back bottom in both a first direction in which the head bottom is a direction away from the bed frame and a second direction in which the head bottom is a direction opposite to the first direction, about a first axis extending in the width direction of the bed frame; The back bottom is provided on the bed frame so as to be rotatable around a second axis extending in the width direction, The method for controlling the bed apparatus includes: When the head bottom is rotated in the second direction, in a state where the back bottom is located at a position where the head bottom and the bed frame come into contact with each other, when the head bottom is rotated in the second direction, the back bottom is rotated in a direction away from the bed frame, and rotating the head bottom in the second direction after rotating the back bottom. A method for controlling a bed apparatus.

5. A method for controlling a bed apparatus including a bed frame and a bottom unit having a back bottom and a head bottom and provided on the bed frame, comprising: The head bottom is connected to the back bottom so as to be rotatable from a position parallel to the back bottom in both a first direction in which the head bottom is a direction away from the bed frame and a second direction in which the head bottom is a direction opposite to the first direction, about a first axis extending in the width direction of the bed frame; The back bottom is provided on the bed frame so as to be rotatable around a second axis extending in the width direction, The method for controlling the bed apparatus includes: When the back bottom is rotated in a direction approaching the bed frame in a state in which the back bottom rises up relative to the bed frame and the head bottom is rotated in the second direction from a position parallel to the back bottom, the head bottom is rotated in the first direction before the back bottom reaches a position parallel to the bed frame, After rotating the head bottom, rotating the back bottom in a direction approaching the bed frame. A method for controlling a bed apparatus.

Images