Bed and leg bottom unit

Abstract

To provide a bed that allows the setting of height positions of toes to easily be changed.SOLUTION: The bed includes: main frames extending in a front-rear direction; leg frames vertically movable with respect to the main frames; leg bottoms provided on the leg frames; and driving devices to vertically move the leg frames; setting change parts for changing height positions of the rear ends of the leg bottoms when the leg frames are raised, wherein the leg bottoms have operation openings for operating the setting change parts.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] Embodiments of the present invention relate to a bed and a leg bottom unit.

Background Art

[0002] There is known a bed that can change the height of the toe when the leg bottom is raised by switching the position of a support stay that supports the leg bottom (Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The bed described in Patent Document 1 has a problem that the workability of the switching operation may be reduced because the leg bottom has to be lifted to switch the support stay.

[0005] An object of embodiments of the present invention is to provide a bed and a leg bottom unit that can easily change the setting of the height position of the toe.

Means for Solving the Problems

[0006] A bed according to an embodiment includes a main frame extending in the front-rear direction, a leg frame vertically movable with respect to the main frame, a leg bottom provided on the leg frame, a drive device for vertically moving the leg frame, and a setting change unit for changing the height position of the rear end of the leg bottom when the leg frame is raised, and the leg bottom has an operation opening for operating the setting change unit.

Effects of the Invention

[0007] According to an embodiment of the present invention, a bed that can easily change the setting of the height position of the toes can be provided.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

Best Mode for Carrying Out the Invention

[0009] The bed according to the embodiment of the present invention will be described with reference to FIGS. 1 to 15.

[0010] FIG. 1 is a plan view showing a bed according to the first embodiment of the present invention. FIG. 2 is a plan view showing a state in which the bottom and side frames are removed. FIG. 3 is a side view showing a state in which the leg frame is raised. In FIG. 3, the side frame is removed. FIG. 3(a) shows a state in which the leg frame is lowered. FIG. 3(b) shows a state in which the rear end of the leg bottom is in a low position when the leg frame is raised. FIG. 3(c) shows a state in which the rear end of the leg bottom is in a high position when the leg frame is raised. FIG. 4 is a side view showing a state in which the bottom is raised from the floor surface by the elevating mechanism.

[0011] The bed 10 shown in FIG. 1 is used, for example, in a nursing facility, a hospital, and a private house, and is an electric bed whose height such as a backrest and a knee part can be operated electrically. The back bottom 30, the knee bottom 34, and the leg bottom 36 of the bed 10 can be tilted. In FIG. 1, the left side in FIG. 1 is the head side, and the right side in FIG. 1 is the foot side. In the embodiment, the direction between the head side and the foot side is defined as the front-rear direction. The bed 10 has a base frame 12, a main frame 14, a side frame 16, and a bottom frame 20.

[0012] The base frame 12 is formed, for example, in a frame shape. The base frame 12 has leg portions 12a at its front and rear ends. The main frame 14 is located above the base frame 12. Two main frames 14 are provided spaced apart in the left - right direction (lateral direction) of the bed 10 and extend in the front - rear direction. The main frame 14 is supported by the base frame 12 via, for example, a lifting mechanism 44. As shown in FIG. 4, the main frame 14, the side frames 16, and the bottom member 26 can move vertically with respect to the base frame 12 by the lifting mechanism 44.

[0013] The side frames 16 are provided protruding in the left - right direction from the main frame 14. A fence body (not shown) or the like is attached to the side frames 16. As shown in FIG. 1, two side frames 16 are provided spaced apart in the left - right direction (lateral direction) of the bed 10. The side frames 16 are provided as required.

[0014] The bottom frame 20 is located inside the main frame 14 in the left - right direction and extends in the front - rear direction. That is, the bottom frame 20 is parallel to the main frame 14. Two bottom frames 20 are provided spaced apart in the left - right direction (lateral direction) of the bed 10. The bottom frame 20 supports a plurality of bottom members 26 described later.

[0015] The bottom frame 20 has a back frame 21 that supports the back bottom 30, a waist frame 22 that supports the waist bottom 32, a knee frame 23 that supports the knee bottom 34, and a leg frame 24 that supports the leg bottom 36. The back frame 21, the waist frame 22, the knee frame 23, and the leg frame 24 are provided in two numbers spaced apart in the left - right direction (lateral direction) of the bed 10.

[0016] The back frame 21 is located on the front end side of the bed 10 and extends in the front-rear direction. The back frame 21 supports the back bottom 30 from the back side. The back frame 21 is tiltable (bendable) with respect to the waist frame 22 by the operation of the first drive device 40a. That is, the front end side of the back frame 21 moves up and down with the rear end side as the rotation fulcrum by the operation of the first drive device 40a.

[0017] The waist frame 22 is located behind the back frame 21 and extends in the front-rear direction. The waist frame 22 supports the waist bottom 32 from the back side. The waist frame 22 is fixed to the main frame 14.

[0018] The knee frame 23 is located behind the waist frame 22 and extends in the front-rear direction. The knee frame 23 supports the knee bottom 34 from the back side. The knee frame 23 is rotatably connected to the waist frame 22 and is also rotatably connected to the leg frame 24.

[0019] The leg frame 24 is located behind the knee frame 23 and extends in the front-rear direction. The leg frame 24 supports the leg bottom 36 from the back side. The leg frame 24 is bendable with respect to the knee frame 23. The leg frame 24 has a mounting portion 24a to which the bottom member 26 is attached, and a hanging portion 24b extending downward from the mounting portion 24a. A stay 51 of the setting change portion 50 described later is attached to the hanging portion 24b.

[0020] As shown in FIG. 3, the leg frame 24 can be switched between two states: a foot-lifting state (the state in FIG. 3(b)) in which the rear end is in a low position, and a foot-lowering state (the state in FIG. 3(c)) in which the rear end is in a high position, by the setting change portion 50.

[0021] As shown in Fig. 3(b), in the foot-lowering state, the rear end of the foot bottom 36 (leg frame 24) is located below the upper surface of the main frame 14. On the other hand, as shown in Fig. 3(c), in the foot-raising state, the rear end of the foot bottom 36 (leg frame 24) is located above the upper surface of the main frame 14. The foot-lowering state, when combined with the back-raising, can allow the user on the bed 10 to assume a relaxed posture. Also, the foot-raising state can reduce the swelling of the legs of the user on the bed 10. The switching operation between the foot-lowering state and the foot-raising state by the setting change unit 50 will be described later.

[0022] The bottom members 26 are fixed on the bottom frame 20, and a plurality of them are provided side by side in the front-rear direction on the main frame 14 and the bottom frame 20. Each bottom member 26 extends in the left-right direction across the bottom frame 20 spaced apart in the left-right direction. As shown in Fig. 1, in this example, 10 bottom members 26 are provided. The upper surface of the bottom member 26 serves as the placement surface for a mattress (not shown), and supports the mattress and the human body on the mattress.

[0023] Each bottom member 26 constitutes a back bottom 30, a waist bottom 32, a knee bottom 34, and a foot bottom 36. The back bottom 30 is constituted by 4 bottom members 26 from the head side (front side). That is, these 4 bottom members 26 are fixed to the back frame 21. The back bottom 30 supports the head to the back of the user lying on the bed 10.

[0024] The waist bottom 32 is located behind the back bottom 30 and is constituted by 1 bottom member 26. That is, this 1 bottom member 26 is fixed to the waist frame 22. The waist bottom 32 supports the waist to the buttocks of the user lying on the bed 10.

[0025] The knee bottom 34 is located behind the waist bottom 32 and is composed of two bottom members 26. That is, these two bottom members 26 are fixed to the knee frame 23. The knee bottom 34 supports the thigh of the user lying on the bed 10.

[0026] The leg bottom 36 is located behind the knee bottom 34 and is composed of three bottom members 26. That is, these three bottom members 26 are fixed to the leg frame 24. The leg bottom 36 supports the lower leg of the user lying on the bed 10.

[0027] Below each bottom member 26, a backrest mechanism 40, a knee lift mechanism 42, a lifting mechanism 44, and a control device 46 are provided. The backrest mechanism 40 is provided below the back bottom 30. The backrest mechanism 40 has, for example, a first driving device 40a composed of an electric cylinder. The backrest mechanism 40 tilts the back frame 21 by the operation of the first driving device 40a.

[0028] The knee lift mechanism 42 is provided behind the backrest mechanism 40. The knee lift mechanism 42 has, for example, a second driving device 42a composed of an electric cylinder and a connection part 42b connected to the second driving device 42a. The second driving device 42a is a driving device that moves the leg frame 24 up and down. The connection part 42b is composed of a rod-shaped body extending in the left-right direction, and the rear end (bottom side) of the second driving device 42a is connected to the central part. Both the left and right ends of the connection part 42b are connected to the front end of the knee frame 23.

[0029] The knee lift mechanism 42 rotates the connection part 42b by the expansion and contraction of the rod of the second driving device 42a. Thereby, the knee frame 23 moves up and down with the front end as the rotation fulcrum and the rear end. Also, the leg frame 24 is rotatably connected to the knee frame 23. Therefore, the leg frame 24 moves up and down by the operation of the second driving device 42a. That is, as shown in FIGS. 3(a) and (b), when the rod of the second driving device 42a extends, the knee frame 23 and the leg frame 24 bend in a mountain-fold shape.

[0030] The lifting mechanism 44 is provided behind the knee-lifting mechanism 42. The lifting mechanism 44 has a third driving device 44a composed of, for example, an electric cylinder. The lifting mechanism 44 is provided between the base frame 12 and the main frame 14. The lifting mechanism 44 raises and lowers the main frame 14 and the bottom frame 20 by the operation of the third driving device 44a. The lifting mechanism 44 can adjust the height dimension from the floor surface to the bottom member 26.

[0031] The control device 46 is provided behind the lifting mechanism 44. The control device 46 controls the operations of the first to third driving devices 40a, 42a, and 44a. The control device 46 is connected to a remote controller (not shown). The control device 46 operates the first to third driving devices 40a, 42a, and 44a based on a command signal transmitted from the remote controller.

[0032] Next, the setting change unit 50 for realizing the foot-lowering state and the foot-raising state will be described.

[0033] FIG. 5 is a plan view showing an enlarged setting change unit in FIG. 1. FIG. 6 is a cross-sectional view of the setting change unit in FIG. 5 as viewed from the direction of arrow A-A. FIG. 7 is a cross-sectional view of the setting change unit in FIG. 5 as viewed from the direction of arrow B-B.

[0034] The setting change unit 50 is for changing the height position of the rear end 36b of the foot bottom 36 when the leg frame 24 is lifted. The setting change unit 50 is provided below each of the left and right leg frames 24. That is, the bed 10 is provided with two setting change units 50. And the setting change unit 50 has a stay 51, a roller 56, a guide part 58a, a placement part 58b, and a restricting part 59.

[0035] Stay 51 is rotatably provided at the hanging part 24b of the leg frame 24. When the leg frame 24 is lifted, the stay 51 can be switched between a first position where the rear end 36b of the leg bottom 36 is in a low position (foot-lowering state) and a second position where the rear end 36b of the leg bottom 36 is in a high position (foot-lifting state).

[0036] As shown in FIG. 6, the first position is the state of the stay 51 shown by the solid line. On the other hand, the second position is the state of the stay 51 shown by the two-dot chain line. The stay 51 has an extension part 52 whose rear end side serves as a rotation fulcrum 52a and extends forward, and an operation part 53 provided at the tip of the extension part 52 and operated between the first position and the second position.

[0037] As shown in FIG. 5, the operation part 53 is a rod-shaped body extending in the left-right direction. The operation part 53 protrudes outward in the left-right direction from the extension part 52. Further, the operation part 53 connects the extension parts 52 located on the left and right respectively. Thereby, when the operation part 53 is operated, both the left and right extension parts 52 can be simultaneously moved to the first position or the second position.

[0038] The clip 54 is provided at the attachment part 24a of the leg frame 24 at a position corresponding to the operation part 53. As shown in FIG. 6, when the stay 51 is in the first position, the operation part 53 is held by the clip 54. On the other hand, when the stay is in the second position, the operation part 53 is removed from the clip 54.

[0039] Here, the leg bottom 36 has an operation opening 36a for operating the operation part 53 of the setting change part 50. The operation opening 36a penetrates the leg bottom 36 in the vertical direction. In this example, the operation opening 36a is provided between adjacent bottom members 26. Specifically, as shown in FIG. 5, the operation opening 36a is provided between the second bottom member 26 and the third bottom member 26 from the bottom member 26 located at the rearmost end of the leg bottom 36.

[0040] As shown in FIGS. 5 and 6, the operation unit 53 is located below the operation opening 36a in a state where the leg frame 24 is lowered. The operation opening 36a has a dimension that allows the user's hand to be inserted. Thereby, the user can operate the operation unit 53 from the operation opening 36a.

[0041] The user can switch the stay 51 from the first position to the second position by pressing the operation unit 53 downward from the operation opening 36a and removing the operation unit 53 from the clip 54. Also, the user can switch the stay 51 from the second position to the first position by lifting the operation unit 53 from the operation opening 36a and holding the operation unit 53 by the clip 54.

[0042] In this way, the user can easily operate the operation unit 53 without lifting the leg bottom 36. Therefore, it is possible to provide the bed 10 that can easily change the setting of the height position of the toes.

[0043] The roller 56 is located below the stay 51 and is provided on the leg frame 24. Specifically, the roller 56 is provided on the vertical portion 24b of the leg frame 24. The roller 56 protrudes outward in the left - right direction from the vertical portion 24b. The roller 56 moves the leg frame 24 in the front - rear direction when the second drive device 42a operates. The leg frame 24, the leg bottom 36, the stay 51, and the roller 56 constitute a leg bottom unit.

[0044] The support portion 58 is located below the stay 51 and the roller 56 and is provided on the main frame 14. The support portion 58 supports the leg frame 24 via the stay 51 or the roller 56. As shown in FIGS. 6 and 7, the support portion 58 is formed in a U - shaped (C - shaped) manner by a guide portion 58a and a placement portion 58b. The lower stage of the support portion 58 is the guide portion 58a, and the upper stage is the placement portion 58b.

[0045] The guide portion 58a allows the roller 56 to slide. That is, the roller 56 moves back and forth on the guide portion 58a. Specifically, when the second drive device 42a operates when the stay 51 is in the first position, the roller 56 moves back and forth on the guide portion 58a. In this example, the control device 46 is attached to the lower surface of the guide portion 58a.

[0046] The placement portion 58b is provided below the operation portion 53. Specifically, the placement portion 58b is provided below the portion of the operation portion 53 that protrudes outward in the left - right direction from the extension portion 52. The placement portion 58b is the portion on which the operation portion 53 is placed when the stay 51 is in the second position. The operation portion 53 moves back and forth on the placement portion 58b by the operation of the second drive device 42a.

[0047] The restricting portion 59 is located in front of the stay 51 and is provided on the main frame 14. The restricting portion 59 extends in the left - right direction from the main frame 14. The restricting portion 59 is located on the front - end side of the placement portion 58b. The restricting portion 59 restricts the forward movement of the stay 51 when the stay 51 is in the second position. Specifically, when the second drive device 42a operates when the stay 51 is in the second position, the operation portion 53 contacts the restricting portion 59. When the stay 51 is in the second position, by the stay 51 contacting the restricting portion 59, the rear end of the leg frame 24 can be raised to a high position with the operation portion 53 as a fulcrum.

[0048] When the leg frame 24 is raised when the stay 51 is in the first position, the stay 51 avoids the restricting portion 59. That is, the height dimension of the restricting portion 59 is set to a height that does not contact when the leg frame 24 is raised when the stay 51 is in the first position. When the stay 51 is in the first position, by the stay 51 avoiding the restricting portion 59, the rear end of the leg frame 24 can be lowered to a low position with the roller 56 as a fulcrum.

[0049] The bed 10 according to the first embodiment has the configuration as described above. Next, the knee - raising operation of the bed 10 will be described.

[0050] Figure 8 is a cross-sectional view showing the state where the leg frame is lowered. Figure 9 is a cross-sectional view showing the state where the leg frame is raised when the stay of the setting change part is in the first position. Figure 10 is an enlarged cross-sectional view showing the setting change part in FIG. 9. Figure 11 is a cross-sectional view showing the state where the leg frame is raised when the stay of the setting change part is in the second position. Figure 12 is an enlarged cross-sectional view showing the setting change part in FIG. 11.

[0051] First, the case of lowering the rear end 36b of the leg bottom 36 will be described.

[0052] As shown in FIG. 8, when the rod of the second drive device 42a is contracted, the knee bottom 34 and the leg bottom 36 are in a horizontal state. When lowering the rear end 36b of the leg bottom 36, the operation part 53 is held by the clip 54 and the stay 51 is set to the first position. In this case, when the stay 51 is in the second position, the operation part 53 is lifted from the operation opening 36a of the leg bottom 36 and the operation part 53 is held by the clip 54.

[0053] Then, when the user operates the remote control to extend the rod of the second drive device 42a, the connecting part 42b rotates in the direction of arrow C in FIG. 9. As a result, the connecting part between the knee frame 23 and the leg frame 24 moves upward, and the roller 56 moves forward on the guide part 58a. In this case, the front end (operation part 53) of the stay 51 passes above the restricting part 59. Thereby, the rear end 36b of the leg bottom 36 can be positioned below the upper surface of the main frame 14, and the knee frame 23 and the leg frame 24 can be bent in a mountain-fold shape.

[0054] After that, when the user operates the remote control to contract the rod of the second drive device 42a, the connecting part 42b rotates in the direction opposite to the direction of arrow C in FIG. 9. Thereby, the knee bottom 34 and the leg bottom 36 can be returned to the horizontal state.

[0055] Next, the case where the rear end 36b of the leg bottom 36 is positioned at a high position will be described.

[0056] When the rear end 36b of the leg bottom 36 is positioned at a high position, when the knee bottom 34 and the leg bottom 36 are in a horizontal state (the state in FIG. 8), the operation unit 53 is removed from the clip 54 and the stay 51 is set to the second position. In this case, the operation unit 53 can be pushed down through the operation opening 36a of the leg bottom 36 to remove the operation unit 53 from the clip 54. In this way, for example, without lifting the leg bottom 36, the operation unit 53 can be easily operated through the operation opening 36a to switch the stay 51 between the first position and the second position.

[0057] Then, when the user operates the remote control to extend the rod of the second drive device 42a, the connecting portion 42b rotates in the direction of arrow C in FIG. 11. As a result, the connecting portion between the knee frame 23 and the leg frame 24 moves upward, and the roller 56 moves forward on the guide portion 58a until the operation unit 53 contacts the restricting portion 59.

[0058] When the operation unit 53 contacts the restricting portion 59, the forward movement of the operation unit 53 is restricted. As a result, the stay 51 lifts the leg frame 24 upward with the operation unit 53 as a fulcrum. As a result, the rear end 36b of the leg bottom 36 can be positioned above the upper surface of the main frame 14, and the knee frame 23 and the leg frame 24 can be bent in a mountain-fold shape.

[0059] Thereafter, when the user operates the remote control to contract the rod of the second drive device 42a, the connecting portion 42b rotates in the direction opposite to the direction of arrow C in FIG. 11. As a result, the knee bottom 34 and the leg bottom 36 can be returned to the horizontal state.

[0060] As described above, the bed 10 has an operation opening 36a in the leg bottom 36 for operating the operation part 53 of the setting change part 50. Therefore, the operation part 53 can be easily operated through the operation opening 36a to set the rear end 36b of the leg bottom 36 to a low position or a high position. Further, the leg bottom unit can be removed from the bed 10, and maintenance of the leg bottom unit can be easily performed.

[0061] Next, the bed according to the second embodiment of the present invention will be described with reference to FIGS. 13 to 15. In the second embodiment, the configuration for switching the stay between the first position and the second position is different from that of the first embodiment. In the second embodiment, the same reference numerals are given to the same components as those in the above-described first embodiment, and the description thereof will be omitted.

[0062] FIG. 13 is a plan view showing an enlarged operation opening of the bed according to the second embodiment of the present invention. FIG. 14 is a cross-sectional view of the setting change part in FIG. 13 as viewed from the direction of arrow D-D. FIG. 15 is a cross-sectional view showing the case where the stay of the setting change part in FIG. 14 is in the second position.

[0063] The setting change part 70 changes the height position of the rear end 36b of the leg bottom 36 when the leg frame 24 is lifted. The setting change part 70 includes a stay 71, a long hole 75, an operation part 77, a roller 56, a guide part 58a, a placement part 58b, and a regulation part 59. Further, the leg frame 24, the leg bottom 36, the stay 71, and the roller 56 constitute a leg bottom unit.

[0064] The stay 71 is rotatably provided on the leg frame 24, and can be switched between a first position where the rear end 36b of the leg bottom 36 is in a low position when the leg frame 24 is lifted, and a second position where the rear end 36b of the leg bottom 36 is in a high position when the leg frame 24 is lifted. The stay 71 has an extension part 72 whose rear end serves as a rotation fulcrum 72a, and a tip part 73 provided at the tip of the extension part 72.

[0065] The tip portion 73 corresponds to the operation portion 53 according to the first embodiment. However, the tip portion 73 is not a portion operated by the user. The tip portion 73 protrudes, for example, outward in the left - right direction of the extension portion 72. The tip portion 73 is placed on the placement portion 58b when the stay 71 is in the second position. Also, the tip portion 73 contacts the restricting portion 59 when the stay 71 is in the second position.

[0066] When the stay 71 is in the first position, by avoiding the restricting portion 59 with the tip portion 73, the rear end 36b of the leg bottom 36 can be set to a low position. On the other hand, when the stay 71 is in the second position, by contacting the restricting portion 59 with the tip portion 73, the rear end 36b of the leg bottom 36 can be set to a high position.

[0067] The long hole 75 is provided in the leg frame 24 and extends in the front - rear direction below the stay 71. Specifically, the long hole 75 penetrates in the thickness direction (left - right direction) of the vertical portion 24b of the leg frame 24 and extends in the front - rear direction.

[0068] The operation portion 77 is slidable in the front - rear direction within the long hole 75. The operation portion 77 operates the stay 71 to the first position and the second position. The operation portion 77 is a rod - shaped body extending in the left - right direction. The operation portion 77 connects the long holes 75 located on the left and right respectively. Thereby, when the operation portion 77 is operated, the stays 71 on both the left and right can be simultaneously moved to the first position or the second position.

[0069] Here, the leg bottom 36 has an operation opening 78 for operating the operation portion 77 of the setting change portion 70. The operation opening 78 penetrates the leg bottom 36 in the up - down direction. In this example, the operation opening 78 is provided between adjacent bottom members 26. Specifically, as shown in FIG. 13, the operation opening 78 is provided between the bottom member 26 located at the rearmost end of the leg bottom 36 and the second bottom member 26.

[0070] The operation unit 77 is located below the operation opening 78 in a state where the leg frame 24 is lowered. The operation opening 78 has dimensions that allow the user's hand to be inserted. The dimension of the operation opening 78 in the front-rear direction is longer than that of the long hole 75, for example. In other words, the long hole 75 is formed within the operation opening 78 in a plan view seen from above. As a result, the user can operate the operation unit 77 from the operation opening 78.

[0071] Specifically, the user can move the operation unit 77 from the operation opening 78 to the front end of the long hole 75 to switch the stay 71 from the second position to the first position. Also, the user can move the operation unit 77 from the operation opening 78 to the rear end of the long hole 75 to switch the stay 71 from the first position to the second position.

[0072] In this case, when the operation unit 77 is located at the front end of the long hole 75, the stay 71 is pushed up by the operation unit 77 to be in the first position. Also, when the operation unit 77 is located at the rear end of the long hole 75, the stay 71 is in a non-contact state with the operation unit 77 and the tip portion 73 is placed on the placement portion 58b to be in the second position. And when the leg frame 24 is lifted when the stay 71 is in the first position, the stay 71 avoids the restricting portion 59.

[0073] Also in the setting change unit 70 according to the second embodiment configured as described above, similar to the setting change unit 50 according to the first embodiment, the user can easily operate the operation unit 77 without lifting the leg bottom 36. Therefore, it is possible to provide the bed 10 that can easily change the setting of the height position of the toes.

[0074] In the above-described embodiments, the case where each bottom is constituted by a plurality of bottom members 26 has been described as an example. However, the aspect of the present invention is not limited to this, and for example, each bottom may be constituted by a single plate-like member. And an operation opening penetrating in the vertical direction may be formed in this single plate-like member.

[0075] In the above-described first embodiment, the case where the operating unit 53 is placed on the placement portion 58b and the operating unit 53 contacts the restricting unit 59 when the stay 51 is in the second position has been described as an example. However, aspects of the present invention are not limited to this. For example, the extending portion 52 may be placed on the placement portion 58b and the extending portion 52 may contact the restricting unit 59.

[0076] Similarly, in the second embodiment, the case where the tip portion 73 is placed on the placement portion 58b and the tip portion 73 contacts the restricting unit 59 has been described as an example. However, the extending portion 72 may be placed on the placement portion 58b and the extending portion 72 may contact the restricting unit 59.

[0077] The embodiment may include the following configuration. (Configuration 1) A main frame extending in the front-rear direction, A leg frame that can move up and down with respect to the main frame, A leg bottom provided on the leg frame, A driving device for moving the leg frame up and down, A setting change unit for changing the height position of the rear end of the leg bottom when the leg frame is raised, Comprising, The leg bottom has an operation opening for operating the setting change unit, and is characterized as a bed. (Configuration 2) The leg bottom has a plurality of bottom members arranged in the front-rear direction, The operation opening is provided between the adjacent bottom members, and is characterized as the bed according to Configuration 1. [[ID=?]](Configuration 3) [[ID=?]] The setting change unit, Is rotatably provided on the leg frame, and has a stay that can be switched between a first position where the rear end of the leg bottom is in a low position when the leg frame is raised and a second position where the rear end of the leg bottom is in a high position when the leg frame is raised, The stay, The rear end side serves as a rotation fulcrum, and has an extending portion extending forward, It should be noted that there seems to be an error in the tag numbering in the original text. The tag is mislabeled as [[ID=?]] in the translation, and the subsequent tags are also affected. Please check and correct the original text for accurate translation and consistent tagging.An operation part which is provided on the tip side of the extension part and operates between the first position and the second position; and has The operation part is located below the operation opening in a state where the leg frame is lowered, and the bed according to Configuration 1 or 2, characterized in that. (Configuration 4) The setting change part is located below the stay and includes a roller provided on the leg frame, a guide part on which the roller can slide, a placement part on which the operation part is placed when the stay is in the second position, and a restricting part that restricts the forward movement of the stay when the stay is in the second position, and has When the leg frame is raised when the stay is in the first position, the bed according to Configuration 3, characterized in that the stay avoids the restricting part. (Configuration 5) The setting change part is rotatably provided on the leg frame, and has a first position where the rear end of the leg bottom is at a low position when the leg frame is raised, and a second position where the rear end of the leg bottom is at a high position when the leg frame is raised, and a stay that can be switched between the first position and the second position, a long hole provided on the leg frame and extending in the front-rear direction below the stay, is slidable in the front-rear direction in the long hole, and an operation part that operates the stay between the first position and the second position, and has The operation part is located below the operation opening in a state where the leg frame is lowered, and the bed according to Configuration 1 or 2, characterized in that. (Configuration 6) The setting change part is located below the stay and includes a roller provided on the leg frame, a guide part on which the roller can slide, a placement part on which the tip of the stay is placed when the stay is in the second position, a restricting part that restricts forward movement of the stay when the stay is in the second position; and has the stay when the operation part is located at the front end of the long hole, is pushed up by the operation part to reach the first position; when the operation part is located at the rear end of the long hole, is in a non-contact state with the operation part and the tip part reaches the second position where it is placed on the placing part; the bed according to Configuration 5, characterized in that when the leg frame is lifted when the stay is in the first position, the stay avoids the restricting part. (Configuration 7) a vertically movable leg frame, a leg bottom provided on the leg frame, a stay rotatably provided on the leg frame, and includes the stay has a first position where the rear end of the leg bottom is lowered when the leg frame is lifted, and a second position where the rear end of the leg bottom is raised when the leg frame is lifted, and is switchable therebetween, the leg bottom is characterized by having an operation opening for operating the stay between the first position and the second position. (Configuration 8) the leg bottom has a plurality of bottom members arranged in the front-rear direction, the leg bottom unit according to Configuration 7, characterized in that the operation opening is provided between adjacent bottom members. (Configuration 9) the leg bottom unit according to Configuration 7 or 8, characterized in that a roller slidable in a guide provided on the main frame of the bed is provided on the leg frame.

[0078] The foregoing embodiments are examples embodying the present invention, and the present invention is not limited to these embodiments. For example, in the foregoing embodiments, those obtained by adding, deleting, or changing some components are also included in the present invention.

Explanation of Reference Numerals

[0079] 10 Bed 12 Base Frame 12a Leg 14 Main Frame 16 Side Frame 20 Bottom Frame 21 Back Frame 22 Lumbar Frame 23 Knee Frame 24 Leg Frame 24a Mounting Port 24b Hanging Port 26 Bottom Member 30 Back Bottom 32 Lumbar Bottom 34 Knee Bottom 36 Leg Bottom 36a Operation Opening 36b Rear End 40 Backrest Mechanism 40a First Driving Device 42 Knee Lifting Mechanism 42a Second Driving Device 42b Connection Port 44 Lifting Mechanism 44a Third Driving Device 46 Control Device 50 Setting Change Unit 51 Stay 52 Extension Port 52a Rotation Fulcrum 53 Operation Unit 54 Clip 56 Roller 58 Support Unit 58a Guide 58b Mounting Port 59 Regulation Unit 70 Setting Change Unit 71 Stay 72 Extension Port 72a pivot point 73 tip 75 slot 77 operation part 78 operation opening

Claims

1. A main frame extending in the front-rear direction, a leg frame vertically movable relative to the main frame, a leg bottom provided on the leg frame, a driving device for vertically moving the leg frame, a setting change unit for changing the height position of the rear end of the leg bottom when the leg frame is raised, comprising, the leg bottom having an operation opening for operating the setting change unit, characterized in that it is a bed.

2. The leg bottom has a plurality of bottom members arranged in the front-rear direction, the operation opening is provided between the adjacent bottom members, characterized in that it is the bed according to Claim 1.

3. The setting change unit, is rotatably provided on the leg frame, and has a stay that can be switched between a first position where the rear end of the leg bottom is at a low position when the leg frame is raised and a second position where the rear end of the leg bottom is at a high position when the leg frame is raised, the stay, has an extension portion with the rear end side as a rotation fulcrum and extending forward, and an operation portion provided at the tip side of the extension portion for operating between the first position and the second position, having, the operation portion is located below the operation opening in a state where the leg frame is lowered, characterized in that it is the bed according to Claim 1 or 2.

4. The setting change unit, is located below the stay and has a roller provided on the leg frame, a guide portion on which the roller can slide, a placement portion on which the operation portion is placed when the stay is in the second position, a restricting portion for restricting the forward movement of the stay when the stay is in the second position, having, when the leg frame is raised when the stay is in the first position, the stay avoids the restricting portion, characterized in that it is the bed according to Claim 3.

5. The setting change unit, is rotatably provided on the leg frame, and has a stay that can be switched between a first position where the rear end of the leg bottom is at a low position when the leg frame is raised and a second position where the rear end of the leg bottom is at a high position when the leg frame is raised, a long hole provided on the leg frame and extending in the front-rear direction below the stay, and an operation portion that can slide in the front-rear direction in the long hole for operating the stay between the first position and the second position, having, The bed according to claim 1 or 2, wherein the operation unit is located below the operation opening in a state where the leg frame is lowered.

6. The setting change unit is located below the stay and includes a roller provided on the leg frame, a guide portion on which the roller is slidable, a placement portion on which the tip of the stay is placed when the stay is in the second position, and a restricting portion that restricts forward movement of the stay when the stay is in the second position. It has The stay is pushed up by the operation unit and reaches the first position when the operation unit is located at the front end of the long hole, becomes non-contact with the operation unit and reaches the second position where the tip is placed on the placement portion when the operation unit is located at the rear end of the long hole, The bed according to claim 5, wherein when the leg frame is raised while the stay is in the first position, the stay avoids the restricting portion.

7. A leg frame that can move up and down, a leg bottom provided on the leg frame, and a stay rotatably provided on the leg frame. It is provided with The stay has a first position for lowering the rear end of the leg bottom when the leg frame is raised, and a second position for raising the rear end of the leg bottom when the leg frame is raised, and can be switched between them, The leg bottom is a leg bottom unit characterized by having an operation opening for operating the stay between the first position and the second position.

8. The leg bottom has a plurality of bottom members arranged in the front-rear direction, The leg bottom unit according to claim 7, wherein the operation opening is provided between adjacent bottom members.

9. The leg bottom unit according to claim 7 or 8, wherein the leg frame is provided with a roller slidable in a guide portion provided on the main frame of the bed.

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