Bed

Abstract

To provide a bed having a bottom with a changeable height at a lower floor position with a simple configuration because the height of the bottom from a floor face can be changed only by switching the posture of a leg seat.SOLUTION: An electric bed 1 comprises a base unit 2 and a bottom 4. The base unit 2 has a pair of support frames 21,21 arranged in parallel with each other. A leg seat 22 to be placed on a floor face is assembled to both the front and back edges of the support frames 21,21. The leg seat 22 is assembled to the support frame 21 to be switchable between a normal posture making the height of the support frame 21 from the floor face larger and a low posture making the height of the support frame 21 from the floor face smaller. An insertion hole 22a into which the support frame 21 is inserted is opened on the leg seat 22. In the insertion hole 22a, a normal posture support part 221a which supports the support frame 21 in the normal posture and a low posture support part 222a which supports the support frame 21 in the low posture are formed.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a bed in which the height of the bottom from the floor surface is adjustable. [Background technology]

[0002] BACKGROUND ART Conventionally, there is known a bed in which the height of a bottom supporting the body of a user from the floor surface can be changed by the driving force of an actuator (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2017-18226 Summary of the Invention [Problem to be solved by the invention]

[0004] In the beds described in the above patent documents, in order to change the height of the bottom when it is in the lowest position (low bed position), it is necessary to significantly change the structure of the frame. For this reason, in the beds according to the prior art, the work of changing the height of the bottom when it is in the low bed position is complicated.

[0005] An object of the present invention is to provide a bed that allows the height of the bottom at the low bed position to be changed with a simple configuration. [Means for solving the problem]

[0006] The bed of the present invention is a bed comprising a base unit placed on the floor surface and a bottom attached above the base unit, wherein the base unit comprises a pair of support frames, and leg seats are attached to both ends of the pair of support frames, and the leg seats are attached to the support frames so as to be switchable between a normal position in which the support frame is higher than the floor surface and a low position in which the support frame is lower than the floor surface, and the leg seats have insertion holes into which the support frames are inserted, and the insertion holes are formed with a normal position support portion that supports the support frame in the normal position and a low position support portion that supports the support frame in the low position.

[0007] With this configuration, the height of the bottom from the floor can be changed simply by switching the position of the leg seat, making it possible to change the height of the bottom at a low floor position with a simple configuration.

[0008] Furthermore, it is preferable that the cross-sectional shape of the support frame perpendicular to the longitudinal direction is rectangular, elliptical, or polygonal, and that the openings of the normal posture support section and the low posture support section are formed in overlapping shapes that are perpendicular to each other.

[0009] With this configuration, the height of the bottom from the floor can be changed simply by switching the insertion point of the support frame between the normal posture support part and the low posture support part, which allows the leg member to be formed compactly and makes it possible to change the height of the bottom at the low floor position with a simple configuration.

[0010] It is also preferable that the low-profile support portion be capable of supporting the support frame in the low profile in any of the profiles obtained by rotating the leg seat 180 degrees.

[0011] According to this configuration, when the leg seat is in a low position, it is possible to make the leg seat extend inward in the left-right direction of the bed.

[0012] Furthermore, a fixing hole is opened in the portion of the upper surface of the support frame that is inserted into the insertion hole, and the leg seat is formed with a first through hole that is opened on the surface facing the fixing hole when the support frame is supported in the normal posture, and a second through hole and a third through hole that are opened on each of the surfaces facing the fixing hole when the support frame is supported in the low posture, and it is preferable that the leg seat be fixed to the support frame by inserting a fixing member into any of the first through hole, the second through hole, and the third through hole and the fixing hole.

[0013] With this configuration, the leg base can be fixed to the support frame by a common fixing method whether the leg base is in the normal position or the low position. [Effects of the Invention]

[0014] A bed having such a configuration makes it possible to change the height of the bottom at the low bed position with a simple configuration. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is a perspective view of an electric bed according to an embodiment of the present invention, with the leg seat in a normal position. [Figure 2] 2 is a perspective view showing the state in which the lifting frame of the electric bed shown in FIG. 1 has been lowered and the bottom, headboard, and footboard have been removed. FIG. [Figure 3] FIG. 1 is a left side view of an electric bed with the leg seat in a normal position. [Figure 4] 1A and 1B are a perspective view showing the leg seat in a normal position and a cross-sectional view showing the leg seat in a normal position assembled to a support frame, respectively. [Figure 5] 1 is a perspective view of an electric bed according to an embodiment of the present invention, with the leg seat in a low position. [Figure 6] 6 is a perspective view showing the state in which the lifting frame of the electric bed shown in FIG. 5 has been lowered and the bottom, headboard, and footboard have been removed. FIG. [Figure 7] FIG. 1 is a left side view of an electric bed with the leg seat in a low position. [Figure 8] 10A and 10B are a perspective view showing the leg seat in a low profile and a cross-sectional view showing the leg seat in a low profile assembled to the support frame, respectively. DETAILED DESCRIPTION OF THE INVENTION

[0016] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In each drawing, the same reference numerals are used to denote the same configuration, and the description thereof will be omitted. Figures 1 and 5 are perspective views showing the configuration of an electric bed 1 according to one embodiment of the bed of the present invention. In this specification, the arrows shown in each drawing indicate the direction of the electric bed 1.

[0017] 1, the electric bed 1 is formed in a generally rectangular shape with the longitudinal direction in the front-to-rear direction in a plan view. The electric bed 1 mainly comprises a base unit 2 placed on the floor, a lifting frame 3 connected to the base unit 2, a bottom 4 that can be raised and lowered between a low-bed position and a high-bed position by driving the lifting frame 3, a headboard 51 attached to the front end of the lifting frame 3, and a footboard 52 attached to the rear end of the lifting frame 3.

[0018] The bottom 4 includes a head bottom 41, a back bottom 42, a seat bottom 43, a knee bottom 44, and a leg bottom 45. The head bottom 41 is positioned to support the user's head, the back bottom 42 is positioned to support the user's back, the seat bottom 43 is positioned to support the user's waist, the knee bottom 44 is positioned to support the user's knees, and the leg bottom 45 is positioned to support the user's legs. A user of the electric bed 1 uses the electric bed 1 by placing a mattress (not shown) on the top surface of the bottom 4 and lying on the mattress with their head at the front and their feet at the back.

[0019] 2 and 6 are perspective views showing the state in which the lifting frame 3 of the electric bed 1 shown in Figs. 1 and 5 has been lowered to the low bed position and the bottom 4, headboard 51, and footboard 52 have been removed. The electric bed 1 is equipped with actuators A1, A2, A3, and A4, and a control box C that controls the driving of these actuators. The actuators A1, A2, A3, and A4 are equipped with telescopic rods and driving units including motors and gear mechanisms for extending and retracting the telescopic rods.

[0020] The base unit 2 is a base that directly or indirectly supports all of the components of the electric bed 1, and is formed in a rectangular shape with its longitudinal direction in the front-to-rear direction in a plan view. As shown in Figures 2 and 6, the base unit 2 has a pair of support frames 21, 21 on the left and right that are arranged parallel to each other with their axial direction in the front-to-rear direction. The support frame 21 has a rectangular cross-sectional shape (longitudinal cross-sectional shape) perpendicular to the longitudinal direction.

[0021] Leg seats 22 to be placed on the floor surface are attached to both front and rear ends of each of the support frames 21, 21. The leg seats 22 are attached to the support frame 21 so as to be switchable between a normal position (leg seat 22H) in which the height of the support frame 21 from the floor surface is large as shown in Figures 1 to 4, and a low position (leg seat 22L) in which the height of the support frame 21 from the floor surface is small as shown in Figures 5 to 8.

[0022] A support pillar 23 is provided in the front and a support pillar 24 is provided in the rear between the support frames 21, 21 in the left-right direction. This connects the support frames 21, 21, and the support frames 21, 21 and the support pillars 23, 24 form the base unit 2 as a strong frame body.

[0023] Furthermore, a support column 25 that is slidable in the front-to-rear direction is bridged in the left-to-right direction between the support frames 21, 21 in the region between the support columns 23 and 24. Rollers (not shown) are attached to both ends of the support column 25. Guide members provided inside the support frames 21, 21 guide the rollers at both ends of the support column 25, allowing the support column 25 to slide in the front-to-rear direction.

[0024] The lifting frame 3 is a generally rectangular frame body having a longitudinal direction in the front-to-rear direction in a plan view. The lifting frame 3 is connected to the base unit 2 so as to be movable up and down by a pair of left and right X-shaped link mechanisms 6. The X-shaped link mechanism 6 is configured by links 61 and 62 of the same length that are connected to each other so as to be rotatable about a shaft 63 that extends in the left-to-right direction at approximately the center.

[0025] The lower ends of the pair of links 61 are connected to the support column 23 so as to be swingable around an axis extending in the left-right direction. Rollers (not shown) are attached to the upper ends of the pair of links 61. The rollers of the pair of links 61 are guided by guide members 31, 31 attached to the lifting frame 3, so that the upper ends of the pair of links 61 are connected to the lifting frame 3 so as to be slidable in the front-rear direction.

[0026] The lower ends of the pair of links 62 are connected to the support columns 25. The upper ends of the pair of links 62 are connected to the lifting frame 3 so as to be swingable around an axis extending in the left-right direction. A connecting rod 64 is hung between the pair of links 61 at a position above the axis 63.

[0027] A connecting rod 27 is bridged between the support frames 21, 21. The actuator A1 is swingably connected to approximately the center of the connecting rod 27. A bracket 65 extending radially is attached to approximately the center of the connecting rod 27. The tip of the extendable rod of the actuator A1 is swingably connected to the tip of the bracket 65 around an axis extending in the left-right direction.

[0028] As a result, when the telescopic rod of actuator A1 extends, the X-shaped link mechanism 6 extends in the vertical direction and the lifting frame 3 rises, and when the telescopic rod of actuator A1 contracts, the X-shaped link mechanism 6 contracts in the vertical direction and the lifting frame 3 descends.

[0029] Connected to the lifting frame 3 are a head frame 411 constituting the head bottom 41, a back frame 421 constituting the back bottom 42, a knee frame 441 constituting the knee bottom 44, and a leg frame 451 supporting the leg bottom 45. A seat bottom 43 is fixedly attached to the lifting frame 3 between the back bottom 42 and the knee bottom 44.

[0030] The back frame 421 is connected to the lifting frame 3 so as to be swingable about an axis extending in the left-right direction with its rear end as a fulcrum. The drive unit of the actuator A2 is connected to the lifting frame 3 so as to be swingable about an axis extending in the left-right direction. The tip of the telescopic rod of the actuator A2 is connected to the back frame 421 via a link mechanism (not shown).

[0031] As a result, when the telescopic rod of actuator A2 extends, the back frame 421 rotates to stand up and changes its position upward, and the head frame 411 and actuator A3 move upward in conjunction with the change in position of the back frame 421. When the telescopic rod of actuator A2 contracts, the back frame 421 rotates to fall down and changes its position downward, and the head frame 411 and actuator A3 move downward in conjunction with the change in position of the back frame 421.

[0032] 4 and 5, the front end of the back frame 421 and the rear end of the head frame 411 are connected to be swingable around an axis extending in the left-right direction. A back bottom 42 is attached to the back frame 421, and a head bottom 41 is attached to the head frame 411, so that when the telescopic rod of actuator A2 extends, the head bottom 41 and back bottom 42 rise upward in unison, and when the telescopic rod of actuator A2 contracts, the head bottom 41 and back bottom 42 fall downward in unison.

[0033] When the back bottom 42 changes its position downward and becomes horizontal, the front end of the back frame 421 or a link mechanism or the like interferes with the lifting frame 3, and the back bottom 42 cannot change its position further downward. The position of the back bottom 42 at this time is the lower limit of the movable range of the position of the back bottom 42. At this time, the load of the back bottom 42 and the head bottom 41 is supported by the lifting frame 3. The lifting frame 3 corresponds to an example of a support member for the back bottom 42.

[0034] When the telescopic rod of actuator A3 extends, the head frame 411 changes its position upward, and the head bottom 41 rises. When the telescopic rod of actuator A3 contracts, the head frame 411 changes its position downward, and the head bottom 41 approaches flatness with respect to the back bottom 42. That is, actuator A3 changes the angle of the head bottom 41 with respect to the back bottom 42 by its driving.

[0035] The knee frame 441 is connected to the lifting frame 3 so as to be swingable around an axis extending in the left-right direction with its front end as a fulcrum. The rear end of the knee frame 441 is connected to the front end of the leg frame 451 by a hinge so as to be swingable around an axis extending in the left-right direction. The drive unit of the actuator A4 is connected to the lifting frame 3 so as to be swingable around an axis extending in the left-right direction. The tip of the telescopic rod of the actuator A4 is connected to the knee frame 441 via a link mechanism (not shown).

[0036] As a result, when the telescopic rod of actuator A4 extends, the knee frame 441 rotates to stand up and changes its position upward, and the front end of the leg frame 451 rises in conjunction with the change in position of the knee frame 441. On the other hand, when the telescopic rod of actuator A4 contracts, the knee frame 441 rotates to approach horizontal and changes its position downward, and the front end of the leg frame 451 descends in conjunction with the change in position of the knee frame 441.

[0037] A knee bottom 44 is attached to the knee frame 441, and a leg bottom 45 is attached to the leg frame 451, so that when the telescopic rod of the actuator A4 extends, the knee bottom 44 and the leg bottom 45 rise in a mountain shape with the hinge at the top, and when the telescopic rod of the actuator A4 contracts, the hinge descends and the knee bottom 44 and the leg bottom 45 approach horizontal.

[0038] When the hinges descend and the knee bottoms 44 and leg bottoms 45 change position downwards to become horizontal, the rear end of the knee frame 441, the front end of the leg frame 451, or the hinges interfere with the lifting frame 3, preventing the knee bottoms 44 and leg bottoms 45 from changing position any further downwards. The positions of the knee bottoms 44 and leg bottoms 45 at this time are the lower limit positions of the movable range of the position of the knee bottoms 44 and leg bottoms 45. At this time, the weight of the knee bottoms 44 and leg bottoms 45 is supported by the lifting frame 3. The lifting frame 3 corresponds to an example of a support member for the knee bottoms 44 and leg bottoms 45.

[0039] Hereinafter, the operation of raising the bottom 4 by actuator A1 and the operation of changing the position of the head bottom 41, back bottom 42, knee bottom 44, and leg bottom 45 upward by actuators A2, A3, and A4 will be collectively referred to as the upward operation, and the operation of lowering the bottom 4 by actuator A1 and the operation of changing the position of the head bottom 41, back bottom 42, knee bottom 44, and leg bottom 45 downward by actuators A2, A3, and A4 will be collectively referred to as the downward operation.

[0040] 4(a) and 8(a), the leg seat 22 is a hollow resin member in the shape of a substantially rectangular parallelepiped column. An insertion hole 22a into which an end of the support frame 21 is inserted is opened on one longitudinal side of one surface of the leg seat 22. The leg seat 22 is assembled to the support frame 21 by inserting the end of the support frame 21 into the insertion hole 22a.

[0041] As shown in Figures 4(a) and 8(a), the insertion hole 22a of the leg seat 22 is formed with a normal posture support portion 221a that supports the support frame 21 in a normal posture and a low posture support portion 222a that supports the support frame 21 in a low posture.

[0042] Specifically, the normal-position support portion 221a is formed so that the end of the support frame 21 can be inserted when the leg seat 22 is in an upright position so that the longitudinal direction of the leg seat 22 faces the vertical direction. The low-position support portion 222a is formed so that the end of the support frame 21 can be inserted when the leg seat 22 is in a tilted position so that the longitudinal direction of the leg seat 22 faces the horizontal direction. The openings of the normal-position support portion 221a and the low-position support portion 222a are formed in rectangular shapes that intersect at right angles and overlap each other.

[0043] According to the electric bed 1 of this embodiment, the height of the bottom 4 from the floor surface can be changed simply by switching the position of the leg seat 22. Specifically, the height of the bottom 4 from the floor surface can be changed simply by switching the insertion position of the support frame 21 between the normal position support part 221a and the low position support part 222a. This makes it possible to change the height of the bottom 4 in the low bed position with a simple configuration. Furthermore, by forming the normal position support part 221a and the low position support part 222a to overlap each other, the size of the leg member 22 can be made compact.

[0044] In the electric bed 1 according to this embodiment, the support frame 21 provided in the base unit 2 has a rectangular cross section (longitudinal cross section) perpendicular to the longitudinal direction, but the cross section of the support frame 21 can also be an ellipse or a polygon other than a rectangle. In this case, the openings of the normal posture support section 221a and the low posture support section 222a in the leg seat 22 are formed in shapes that are approximately the same as the cross section of the support frame 21 and that intersect perpendicularly and overlap each other.

[0045] Furthermore, the low-profile support portion 222a of the leg seat 22 can support the support frame 21 in a low profile in any of the positions in which the leg seat 22 is rotated 180 degrees. Specifically, since the low-profile support portion 222a is formed in the center of the leg seat 22, the low-profile support portion 222a is positioned at the same height regardless of which side of the leg seat 22 is placed on the floor (whether the second through-hole 222b or the third through-hole 222c, which will be described later, is positioned on the upper side). Therefore, as shown in FIG. 6, when the leg seat 22 is in a low profile, the leg seat 22 can be extended inward in the left-right direction of the electric bed 1.

[0046] 4(b) and 8(b), a fixing hole 21a with a female thread formed therein is opened in a portion that is inserted into the insertion hole 22a on the upper surface of the support frame 21. A first through hole 221b is opened in the leg seat 22 on a surface that faces the fixing hole 21a when the support frame 21 is supported in the normal position. A second through hole 222b and a third through hole 222c are opened in each of the surfaces (two side surfaces) of the leg seat 22 that face the fixing hole 21a when the support frame 21 is supported in the low position.

[0047] When the leg seat 22 is in the normal position, as shown in Fig. 4(b), the fixing screw S, which is a fixing member, is inserted into the first through-hole 221b and the fixing hole 21a (the fixing screw S is screwed into the fixing hole 21a), thereby fixing the leg seat 22 to the support frame 21. As a result, the electric bed 1 is in the normal position, as shown in Fig. 3, in which the height of the bottom 4 (the height of the support frame 21) is high when the bottom 4 is in the low bed position.

[0048] On the other hand, when the leg seat 22 is in a low position, as shown in Fig. 8(b), the fixing screw S is inserted into the upper side of either the second through-hole 222b or the third through-hole 222c and the fixing hole 21a (the fixing screw S is screwed into the fixing hole 21a), thereby fixing the leg seat 22 to the support frame 21. As a result, as shown in Fig. 7, the electric bed 1 is in a low position where the height of the bottom 4 (the height of the support frame 21) is small when the bottom 4 is in the low bed position.

[0049] Thus, according to this embodiment, whether the leg base 22 is in the normal position or the low position (more specifically, in either case where the leg base 22 is used in the low position), it can be fixed to the support frame 22 using a common fixing method. [Explanation of symbols]

[0050] 1 Electric bed (bed) 2 Base unit 3 Lifting frame 4 Bottom 6 X-link mechanism 21 Support frame 21a Fixing hole 22 Leg seat 22a Insertion hole 22H Leg seat (normal posture) 22L Leg seat (low posture) 23 Support column 24 Support column 25 Support column 27 Connecting rod 31,31 guide member 41 head bottom 42 Back bottom 43 Seat bottom 44 Knee Bottom 45 Leg Bottom 51 Headboard 52 Footboard 61,62 Link 63 Axis 64 Connecting rod 65 Bracket 221a Normal position support part 221b First through hole 222a Low position support part 222b Second through hole 222c Third through hole 411 Head frame 421 Back frame 441 Knee frame 451 Leg frame A1, A2, A3, A4 actuators C Control box S Fixing screw (fixing member)

Claims

1. a base unit placed on the floor; a bottom attached above the base unit, The base unit includes a pair of support frames; Leg seats are attached to both ends of the pair of support frames, The leg seat is assembled to the support frame so as to be switchable between a normal posture in which the height of the support frame from the floor surface is large and a low posture in which the height of the support frame from the floor surface is small, The leg seat has an insertion hole into which the support frame is inserted, The bed is formed in the insertion hole with a normal posture support portion that supports the support frame in the normal posture and a low posture support portion that supports the support frame in the low posture.

2. The support frame has a cross section perpendicular to the longitudinal direction that is rectangular, elliptical, or polygonal, The bed according to claim 1 , wherein the openings of the normal-profile support section and the low-profile support section are formed in shapes that are perpendicular to each other and overlap each other.

3. 3. The bed according to claim 2, wherein the low-profile support portion is capable of supporting the support frame in the low profile in any of the profiles obtained by rotating the leg seat by 180 degrees.

4. a fixing hole is opened in a portion of the upper surface of the support frame that is inserted into the insertion hole; The leg seat is formed with a first through hole that opens on a surface facing the fixing hole when the support frame is supported in the normal posture, and a second through hole and a third through hole that open on each of the surfaces facing the fixing hole when the support frame is supported in the low posture, The bed of claim 3, wherein the leg seat is fixed to the support frame by inserting a fixing member into any one of the first through hole, the second through hole, and the third through hole and the fixing hole.

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