Bed device and bed device system

Abstract

To provide a bed device and a bed device system capable of erecting the pelvis when raising a user's upper body.SOLUTION: A bed device includes: a frame; a back frame provided movably to the frame whose lower end moves further to a head side with respect to the frame as an angle relative to the frame increases; a waist bottom attaching jig fixed to the frame; a pelvis bottom attaching jig that can be rotatably connected to the waist bottom attaching jig; and a pelvis bottom fixed to the position away from the connection part with the waist bottom attaching jig in the pelvis bottom attaching jig. When the pelvis bottom attaching jig is connected to the waist bottom attaching jig, the back frame comes in contact with the end part on the foot side of the undersurface of the pelvis bottom if the back frame angle is a first angle, and the back frame comes in contact with the end part on the head side of the undersurface of the pelvis bottom if the back frame angle is a second angle.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] Embodiments of the present invention relate to a bed device and a bed device system.

Background Art

[0002] In a bed device used in a medical facility or a nursing facility, etc., there is one that can raise or lower the upper body of a user by changing the angle of a back frame with respect to a frame parallel to the floor surface of the room. When raising the upper body of the user with such a bed device, by raising the pelvis of the user, the pressure on the abdomen can be reduced, and the user can be guided into an appropriate posture.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] An object of embodiments of the present invention is to provide a bed device and a bed device system capable of raising the pelvis when raising the upper body of a user.

Means for Solving the Problems

[0005] The bed device according to an embodiment of the present invention includes a frame, a back frame provided movably with respect to the frame, and the lower end moves toward the head side with respect to the frame as the angle with respect to the frame increases, a lumbar bottom mounting jig fixed to the frame, a pelvic bottom mounting jig rotatably connectable to the lumbar bottom mounting jig, and a pelvic bottom fixed at a position away from the connecting portion of the pelvic bottom mounting jig with the lumbar bottom mounting jig. When the pelvic bottom mounting jig is connected to the lumbar bottom mounting jig, when the back frame angle of the back frame with respect to the frame is a first angle, the back frame contacts the foot-side end of the lower surface of the pelvic bottom, and when the back frame angle is a second angle larger than the first angle, the back frame contacts the head-side end of the lower surface of the pelvic bottom.

[0006] The bed device system according to an embodiment of the present invention includes the bed device, a replacement pelvic bottom mounting jig, and a replacement pelvic bottom fixed at a position away from the connecting portion of the replacement pelvic bottom mounting jig with the lumbar bottom mounting jig. The lumbar bottom mounting jig can release the connection with the pelvic bottom mounting jig and rotatably connect the replacement pelvic bottom mounting jig. The distance between the connecting portion and the replacement pelvic bottom in the replacement pelvic bottom mounting jig is different from the distance between the connecting portion and the pelvic bottom in the pelvic bottom mounting jig.

Advantages of the Invention

[0007] According to an embodiment of the present invention, a bed device and a bed device system capable of standing the pelvis when raising the upper body of a user can be realized.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

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Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

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Figure 12

Figure 13

Figure 14

Figure 15

Figure 16

Embodiment for Carrying Out the Invention

[0009] <First Embodiment> Hereinafter, embodiments of the present invention will be described with reference to the drawings. In this specification, when a user lies on the bed device in the supine position, the direction where the head is located as viewed from the torso is referred to as the "head side", the direction where the feet are located as the "foot side", the direction where the right hand is located as the "right side", the direction where the left hand is located as the "left side", the direction where the floor surface of the room is located as the "lower side", and the direction where the ceiling is located as the "upper side".

[0010] (Configuration) The bed device according to this embodiment will be described. Fig. 1 is a side view showing the bed device according to this embodiment. Note that the drawings are schematic and are emphasized, simplified, or omitted as appropriate. For example, in an actual bed device, a mattress is interposed between each bottom and the user U, but the mattress is omitted from the illustration. The same applies to other drawings described later.

[0011] As shown in Fig. 1, in the bed device 1 according to this embodiment, a frame 10, a back frame 20, a lumbar bottom mounting jig 31, a pelvic bottom mounting jig 32, a back bottom mounting jig 33, a lumbar bottom 41, a pelvic bottom 42, a back bottom 43, and an actuator 50 are provided. Note that the bed device 1 is also provided with a knee bottom mounting jig, a foot bottom mounting jig, a knee bottom, and a foot bottom, but in this embodiment, the illustration and description thereof are omitted.

[0012] The frame 10 is provided substantially over the entire bed device 1 when viewed from above, and supports the back frame 20, the lumbar bottom attachment jig 31, the pelvic bottom attachment jig 32, the back bottom attachment jig 33, and the actuator 50. The height of the frame 10 from the floor surface may be changeable. Normally, the frame 10 is parallel to the floor surface of the room. The frame 10 may be inclined with respect to the floor surface, but in the present embodiment, the case where the frame 10 is parallel to the floor surface will be described.

[0013] The back frame 20 is movably provided with respect to the frame 10 by the actuator 50. By raising the back frame 20 with respect to the frame 10, the upper body of the user U can be lifted. Hereinafter, the angle of the back frame 20 with respect to the frame 10 will be referred to as the "back frame angle θb". The back frame angle θb is, for example, the angle formed by the upper surface of the frame 10 and the upper surface of the back frame 20. The back frame angle θb can be changed, for example, in the range of 0° to 75°. Hereinafter, the movement in which the back frame angle θb increases will be referred to as "back raising", and the movement in which the back frame angle θb decreases will be referred to as "back lowering".

[0014] The back frame 20 is configured such that as the back frame angle θb increases, the lower end 20a of the back frame 20 moves toward the head side with respect to the frame 10. Thereby, when the back is raised, the pressure on the abdomen of the user U can be reduced.

[0015] The lumbar bottom attachment jig 31 is fixed to the frame 10. A connecting portion 31a capable of rotatably connecting the pelvic bottom attachment jig 32 is provided at the head-side end of the lumbar bottom attachment jig 31.

[0016] The pelvic bottom attachment jig 32 is detachable from other parts of the bed device 1. A connecting portion 32a is provided at one end of the pelvic bottom attachment jig 32. In the example shown in FIG. 1, the connecting portion 32a of the pelvic bottom attachment jig 32 is arranged on the foot side and is rotatably connected to the connecting portion 31a of the lumbar bottom attachment jig 31. The pelvic bottom attachment jig 32 is arranged so as not to interfere with the back frame 20. For example, a pair of pelvic bottom attachment jigs 32 are provided and arranged on both the left and right sides of the back frame 20.

[0017] The back bottom attachment jig 33 is fixed to the back bottom 43. The back bottom 43 is fixed to the back frame 20. Therefore, the back bottom attachment jig 33 is fixed to the back frame 20 via the back bottom 43. A connecting portion 33a capable of connecting the pelvic bottom attachment jig 32 is provided at the foot-side end of the back bottom attachment jig 33. The connecting portion 33a of the back bottom attachment jig 33 may connect the pelvic bottom attachment jig 32 rotatably or fixedly.

[0018] In this way, the lumbar bottom attachment jig 31 is fixed to the frame 10, the back bottom attachment jig 33 is fixed to the back frame 20, and the pelvic bottom attachment jig 32 can be connected to either the lumbar bottom attachment jig 31 or the back bottom attachment jig 33. The behavior of the pelvic bottom attachment jig 32 varies depending on whether it is connected to the lumbar bottom attachment jig 31 or the back bottom attachment jig 33. This will be described later.

[0019] The lumbar bottom 41, the pelvic bottom 42, and the back bottom 43 are all substantially plate-shaped members. Therefore, the upper surface and the lower surface of each bottom are substantially parallel. The lumbar bottom 41 is fixed to the lumbar bottom attachment jig 31. Therefore, the lumbar bottom 41 is fixed to the frame 10 via the lumbar bottom attachment jig 31. The back bottom 43 is fixed to the back frame 20.

[0020] The pelvic bottom 42 is fixed at a position away from the connecting portion 32a with the lumbar bottom attachment jig 31 in the pelvic bottom attachment jig 32. Thereby, when the pelvic bottom attachment jig 32 is connected to the lumbar bottom attachment jig 31, the pelvic bottom 42 is at a position away from the pelvic bottom 42 itself toward the foot side, that is, it can rotate around the connecting portion 32a of the pelvic bottom attachment jig 32. On the other hand, when the pelvic bottom attachment jig 32 is connected to the back bottom attachment jig 33, the pelvic bottom 42 is fixed to the back frame 20.

[0021] (Operation) Figs. 2 to 5 are side views showing the operation of the bed device according to the present embodiment. Fig. 2 shows the case where the back frame angle θb is 0°, Fig. 3 shows the case where the back frame angle θb is 45°, Fig. 4 shows the case where the back frame angle θb is 60°, and Fig. 5 shows the case where the back frame angle θb is 75°. Fig. 6 is a diagram showing the positional relationship between the back frame and the lumbar bottom when the back frame angle changes in the present embodiment. Fig. 7 is a graph showing the relationship between the back frame angle and the pelvic bottom angle, with the back frame angle on the horizontal axis and the pelvic bottom angle on the vertical axis. In addition, in Figs. 2 to 5, the back bottom attachment jig 33 and the actuator 50 are not shown.

[0022] Hereinafter, the angle of the pelvic bottom 42 with respect to the frame 10 is defined as the "pelvic bottom angle θp". The pelvic bottom angle θp is, for example, the angle formed by the upper surface of the frame 10 and the lower surface 42a of the pelvic bottom 42.

[0023] First, the case where the connecting portion 32a of the pelvic bottom attachment jig 32 and the connecting portion 31a of the lumbar bottom attachment jig 31 are connected will be described. In this case, the pelvic bottom attachment jig 32 is rotatable with respect to the lumbar bottom attachment jig 31.

[0024] As shown in FIG. 2, when the back frame angle θb is 0°, the entire lower surface 42a of the pelvic bottom 42 is in contact with the upper surface 20b of the back frame 20. Therefore, the pelvic bottom angle θp is also 0°. As a result, the user U can take a normal supine position. At this time, the buttocks of the user U are supported by the lumbar bottom 41 via the mattress, the pelvis is supported by the pelvic bottom 42 via the mattress, and the back and head are supported by the back bottom 43 via the mattress.

[0025] As shown in FIGS. 3 and 6, when the actuator 50 operates, a back-lifting operation is performed. That is, the back frame 20 rises with respect to the frame 10, and the lower end 20a of the back frame 20 moves toward the head side. At this time, the upper surface 20b of the back frame 20 abuts against the end portion 42b on the foot side of the lower surface 42a of the pelvic bottom 42 and pushes up the end portion 42b.

[0026] Since the pelvic bottom 42 is rotatable about the connecting portion 32a of the pelvic bottom mounting jig 32 located on the foot side of the pelvic bottom 42, the end portion 42b on the foot side of the lower surface 42a of the pelvic bottom 42 is closer to the rotation center than the end portion 42c on the head side of the lower surface 42a. Therefore, when the end portion 42b on the foot side is pushed up by the back frame 20, the end portion 42c on the head side is pushed up higher than the end portion 42b on the foot side. As a result, the pelvic bottom angle θp becomes larger than the back frame angle θb.

[0027] Therefore, when the back frame angle θb is in the first angle range, for example, an angle range greater than 0° and less than 60°, the end portion 42b on the foot side of the lower surface 42a of the pelvic bottom 42 is in contact with the upper surface 20b of the back frame 20, and the pelvic bottom angle θp formed by the lower surface 42a of the pelvic bottom 42 and the upper surface of the frame 10 is larger than the back frame angle θb. FIG. 3 shows a case where the back frame angle θb is a first angle within the first angle range, for example, 45°.

[0028] As shown in FIGS. 4 and 6, when the back frame 20 further rises with respect to the frame 10 and the lower end 20a of the back frame 20 further moves toward the head side, and when the back frame angle θb becomes a third angle, which is the boundary between the first angle range and the second angle range, for example, 60°, the upper surface 20b of the back frame 20 abuts against the entire lower surface 42a of the pelvic bottom 42, and the pelvic bottom angle θp becomes equal to the back frame angle θb.

[0029] As shown in FIGS. 5 and 6, when the back frame 20 further rises with respect to the frame 10 and the lower end 20a of the back frame 20 further moves toward the head side, the upper surface 20b of the back frame 20 abuts against the head-side end portion 42c of the lower surface 42a of the pelvic bottom 42 and pushes up the end portion 42c.

[0030] As described above, since the pelvic bottom 42 rotates about the connecting portion 32a located on the foot side with respect to the pelvic bottom 42, the head-side end portion 42c of the lower surface 42a of the pelvic bottom 42 is farther from the rotation center than the foot-side end portion 42b. For this reason, when the head-side end portion 42c is pushed up by the back frame 20, the foot-side end portion 42b moves away from the back frame 20, and the pelvic bottom angle θp becomes smaller than the back frame angle θb.

[0031] For this reason, when the back frame angle θb is in the second angle range greater than the third angle and less than 90°, the head-side end portion 42c of the lower surface 42a of the pelvic bottom 42 contacts the upper surface 20b of the back frame 20, and the pelvic bottom angle θp is smaller than the back frame angle θb. FIG. 5 shows a case where the back frame angle θb is a first angle, for example, 75°, within the second angle range.

[0032] As shown by the solid line in Fig. 7, in the above-mentioned back-lifting operation, when the back frame angle θb is 0°, the pelvic bottom angle θp is also 0°. When the back frame angle θb is within the first angle range, the pelvic bottom angle θp becomes larger than the back frame angle θb. When the back frame angle θb reaches a certain angle, for example, 60°, the pelvic bottom angle θp becomes equal to the back frame angle θb. When the back frame angle θb is within the second angle range, the pelvic bottom angle θp becomes smaller than the back frame angle θb. On the other hand, the back bottom 43 is fixed to the back frame 20. In this way, when the back frame 20 rises from the horizontal state, the pelvic bottom 42 stands up ahead of the back bottom 43 and then is overtaken by the back bottom 43, and the angle becomes closer to the horizontal than the back bottom 43.

[0033] Therefore, the user U is pushed by the pelvis against the pelvic bottom 42 and stands up at an early stage of the back-lifting operation, and the pelvis is guided into a standing posture. On the other hand, after the back frame 20 rises to a certain angle, the angle of the pelvic bottom 42 becomes an angle intermediate between the lumbar bottom 41 and the back bottom 43, and the user U can take a natural sitting position with the upper body resting on the pelvic bottom 42 and the back bottom 43. Note that the angle of the lumbar bottom 41 with respect to the frame 10 is, for example, always 0°.

[0034] In this embodiment, as an example, when the back frame angle θb is 45°, the difference between the pelvic bottom angle θp and the back frame angle θb is the largest. When the back frame angle θb is 60°, the bed device 1 is set so that the pelvic bottom angle θp and the back frame angle θb are equal. According to the subjective evaluation, when the bed device 1 is set in this way, the displacement of the user U's waist position in the foot direction is most suppressed, and the need for the caregiver to correct the position of the user U is minimized.

[0035] In addition, in the back-lowering operation, it is an operation that reverses the above-mentioned back-lifting operation. As a result, the user U can shift from the sitting position to the supine position with the pelvis supported by the pelvic bottom 42. When the back frame angle θb returns to 0°, the pelvic bottom angle θp also returns to 0°, and the user U can take a natural supine position.

[0036] Next, the operation when the function of the above-described pelvic bottom is not used will be described. FIGS. 8(a) and 8(b) are side views showing the operation when the function of the pelvic bottom is not used in the bed device according to the present embodiment.

[0037] As shown in FIG. 8(a), the connection between the pelvic bottom attachment jig 32 and the lumbar bottom attachment jig 31 is released, and the pelvic bottom attachment jig 32 is connected to the back bottom attachment jig 33. Specifically, the connection portion 32a of the pelvic bottom attachment jig 32 is detached from the connection portion 31a of the lumbar bottom attachment jig 31 and connected to the connection portion 33a of the back bottom attachment jig 33. At this time, the connection portion 32a of the pelvic bottom attachment jig 32 is located on the head side of the pelvic bottom 42.

[0038] As a result, as shown in FIG. 8(b), since the pelvic bottom attachment jig 32 moves according to the back frame 20, the pelvic bottom 42 is fixed to the back frame 20. That is, as shown by the broken line in FIG. 7, the pelvic bottom angle θp always becomes equal to the back frame angle θb, and the pelvic bottom 42 moves in the same manner as the back bottom 43. As a result, the operation in which the above-described pelvic bottom 42 stands up ahead of the back bottom 43 can be stopped.

[0039] (Effect) As described above, according to the present embodiment, in the bed device 1 in which the angle of the back frame 20 with respect to the frame 10 (back frame angle θb) can be changed, as the back frame angle θb increases, the lower end 20a of the back frame 20 is configured to move to the head side, the pelvic bottom 42 is rotatable about a connection portion 32a located on the foot side of the pelvic bottom 42, and when the pelvic bottom attachment jig 32 is connected to the lumbar bottom attachment jig 31, when the back frame angle θb is a first angle greater than 0°, the foot-side end portion 42b of the lower surface 42a of the pelvic bottom 42 contacts the upper surface 20b of the back frame 20, and when the back frame angle θb is a second angle greater than the first angle and less than 90°, the head-side end portion 42c of the lower surface 42a of the pelvic bottom 42 contacts the upper surface 20b of the back frame 20.

[0040] Accordingly, when the back frame angle θb is an angle within the first angle range, the pelvic bottom angle θp becomes larger than the back frame angle θb, and when the back frame angle θb is an angle within the second angle range, the pelvic bottom angle θp becomes smaller than the back frame angle θb. As a result, in the back raising operation, in the first angle range, the pelvic bottom 42 rises prior to the back bottom 43, enabling the pelvis of the user U to be raised, and in the second angle range, the angle of the pelvic bottom 42 becomes an angle intermediate between the back bottom 43 and the lumbar bottom 41, allowing the user U to assume a natural sitting position.

[0041] On the other hand, in the back lowering operation, since the upper body can be laid down while supporting the pelvis of the user U, the collapse of the posture of the user U can be suppressed. And when the back frame 20 is returned to the horizontal state, the pelvic bottom 42 also becomes horizontal, so that the supine user U is not given a sense of discomfort.

[0042] Also, in the present embodiment, the pelvic bottom attachment jig 32 can be connected to both the lumbar bottom attachment jig 31 and the back bottom attachment jig 33. If the pelvic bottom attachment jig 32 is connected to the lumbar bottom attachment jig 31, the operation of setting the above-described pelvic bottom 42 at an angle different from that of the back bottom 43 becomes possible. On the other hand, if the pelvic bottom attachment jig 32 is connected to the back bottom attachment jig 33, the same operation as that of the back bottom 43 can be made for the pelvic bottom 42. Thus, the function can be switched according to the state and preference of the user U.

[0043] <First Modification of the First Embodiment> FIG. 9 is a side view showing the pelvic bottom of the bed device according to this modification. As shown in FIG. 9, in the pelvic bottom 62 of this modification, a heater 52 is incorporated. By the heater 52, it is possible to warm the pelvis of the user U and the sacrum located above and behind the pelvis through the mattress. By warming the sacrum, effects of adjusting the autonomic nerves of the user U and improving sleep can be expected. The configurations, operations, and effects other than those described above in this modification are the same as those in the first embodiment.

[0044] <Second Modification of the First Embodiment> FIG. 10 is a side view showing the pelvic bottom of the bed device according to this modification. As shown in FIG. 10, in the pelvic bottom 72 of this modification, a sensor 53 is incorporated. The sensor 53 detects the getting in and out of the user U from the bed. The sensor 53 is, for example, a load sensor. According to this modification, by the sensor 53 detecting whether the user U is on the bed device 1 and outputting the detection result by an electrical signal or the like, it is possible to record the getting in and out of the user U from the bed and notify a caregiver who is at a place away from the getting in and out of the user U.

[0045] Note that the sensor 53 is not limited to a load sensor, and it may be a sensor that detects the heart rate and respiratory rate of the user U. In this case, the sensor 53 detects the getting in and out of the user U and can measure the heart rate and respiratory rate when the user U is in bed. The configurations, operations, and effects other than those described above in this modification are the same as those in the first embodiment.

[0046] <Second Embodiment> FIG. 11(a) is a side view showing the pelvic bottom attachment jig and the pelvic bottom of the bed device system according to this embodiment, and FIG. 11(b) is a side view showing the replacement pelvic bottom attachment jig and the replacement pelvic bottom. FIG. 12 is a diagram showing the operation of the bed device system according to this embodiment.

[0047] (Configuration) As shown in FIGS. 11(a) and (b), in the bed device system according to the present embodiment, a bed device 1 (see FIG. 1) according to the first embodiment, a replacement pelvic bottom attachment jig 132, and a replacement pelvic bottom 142 are provided. The replacement pelvic bottom 142 is fixed at a position away from the connecting portion 132a in the replacement pelvic bottom attachment jig 132. The connecting portion 132a can be connected to the lumbar bottom attachment jig 31 of the bed device 1.

[0048] And the distance D2 between the connecting portion 132a in the replacement pelvic bottom attachment jig 132 and the replacement pelvic bottom 142 is different from the distance D1 between the connecting portion 32a in the pelvic bottom attachment jig 32 of the bed device 1 and the pelvic bottom 42. For example, the distance D2 is shorter than the distance D1.

[0049] (Operation) In the bed device system according to the present embodiment, the pelvic bottom attachment jig and the pelvic bottom attached to the bed device 1 can be exchanged between a set consisting of the original pelvic bottom attachment jig 32 and the pelvic bottom 42 and a set consisting of the replacement pelvic bottom attachment jig 132 and the replacement pelvic bottom 142. A plurality of sets of the replacement pelvic bottom attachment jig and the replacement pelvic bottom may be provided. In this case, it is preferable that the distance between the connecting portion in the pelvic bottom attachment jig and the pelvic bottom is different between the sets.

[0050] As shown in FIG. 12, since the distance D2 in the set consisting of the replacement pelvic bottom attachment jig 132 and the replacement pelvic bottom 142 is shorter than the distance D1 in the set consisting of the original pelvic bottom attachment jig 32 and the pelvic bottom 42, the rotation radius of the replacement pelvic bottom 142 is small. Therefore, when the back frame angle θb is the first angle, the pelvic bottom angle θp becomes larger.

[0051] In this way, by preparing a plurality of sets with different turning radii and connecting any one of the sets to the hip bottom attachment jig 31, it is possible to select the mode of change of the pelvic bottom angle θp. Thereby, the posture of the user U can be supported according to the physique and physical condition of the user U. The configurations, operations, and effects other than those described above in the present embodiment are the same as those in the first embodiment.

[0052] Note that, as described in the first and second modification examples of the first embodiment, a heater or a sensor may be incorporated in a part of the set including the replacement pelvic bottom attachment jig 132 and the replacement pelvic bottom 142 prepared in the present embodiment.

[0053] <Specific Example> Hereinafter, a specific example of the first embodiment will be described. FIG. 13 is a perspective view showing a bed device according to this specific example. FIG. 14 is a side view showing a bed device according to this specific example. FIGS. 15(a) to (c) and FIGS. 16(a) to (c) are side views showing the operation of the bed device according to this specific example.

[0054] As shown in FIGS. 13 to 16(c), in the bed device 201 according to this specific example, the back frame 20 is disposed inside the frame 10 in the left-right direction, and a pair of hip bottom attachment jigs 31, pelvic bottom attachment jigs 32, and back bottom attachment jigs 33 are disposed outside the frame 10, respectively. Further, the hip bottom 41, pelvic bottom 42, and back bottom 43 are disposed over the entire length of the bed device 201 in the left-right direction. Thereby, the back frame 20 can move without interfering with the pelvic bottom attachment jig 32 or the like and can abut against the pelvic bottom 42.

[0055] In the bed device 201, a knee bottom 44 and a foot bottom 45 are provided. The knee bottom 44 is connected to the waist bottom 41 so as to be rotatable. The foot bottom 45 is connected to the knee bottom 44 so as to be rotatable. Further, in the bed device 201, a headboard 56 is provided on the head side, and a footboard 57 is provided on the foot side. The configurations, operations, and effects other than those described above in this specific example are the same as those in the first embodiment.

[0056] Each of the foregoing embodiments and modifications thereof is an example embodying the present invention, and the present invention is not limited to these embodiments and modifications. For example, in each of the foregoing embodiments and modifications, those in which some components or steps are added, deleted, or changed are also included in the present invention. Further, each of the foregoing embodiments and modifications can be implemented in combination with each other.

[0057] The present invention includes the following aspects.

[0058] (Appendix 1) A frame, a back frame movably provided with respect to the frame, the lower end of which moves toward the head side with respect to the frame as the angle with respect to the frame increases, a waist bottom attachment jig fixed to the frame, a pelvis bottom attachment jig rotatably connectable to the waist bottom attachment jig, a pelvis bottom fixed at a position away from the connecting portion of the pelvis bottom attachment jig with the waist bottom attachment jig, comprising when the pelvis bottom attachment jig is connected to the waist bottom attachment jig, when the back frame angle of the back frame with respect to the frame is a first angle, the back frame contacts the end on the foot side of the lower surface of the pelvis bottom, a bed device in which when the back frame angle is a second angle greater than the first angle, the back frame contacts the end on the head side of the lower surface of the pelvis bottom.

[0059] (Appendix 2) When the back frame angle is the first angle, the pelvic bottom angle formed by the lower surface of the pelvic bottom and the upper surface of the frame is larger than the back frame angle. The bed device according to Supplementary Note 1, wherein when the back frame angle is the second angle, the pelvic bottom angle is smaller than the back frame angle.

[0060] (Supplementary Note 3) The bed device according to Supplementary Note 1 or 2, wherein the first angle is larger than 0 degrees and the second angle is smaller than 90 degrees.

[0061] (Supplementary Note 4) The bed device according to any one of Supplementary Notes 1 to 3, wherein when the back frame angle is 0 degrees, the entire lower surface of the pelvic bottom contacts the upper surface of the back frame.

[0062] (Supplementary Note 5) The bed device according to any one of Supplementary Notes 1 to 4, wherein when the back frame angle is a third angle that is larger than the first angle and smaller than the second angle, the back frame contacts the entire lower surface of the pelvic bottom.

[0063] (Supplementary Note 6) Further comprising a back bottom mounting jig fixed to the back frame. The bed device according to any one of Supplementary Notes 1 to 5, wherein the pelvic bottom mounting jig can be disconnected from the lumbar bottom mounting jig and connected to the back bottom mounting jig.

[0064] (Supplementary Note 7) The bed device according to Supplementary Note 6, wherein when the pelvic bottom mounting jig is connected to the back bottom mounting jig, the pelvic bottom mounting jig is fixed to the back frame.

[0065] (Supplementary Note 8) The bed device according to any one of Supplementary Notes 1 to 7, wherein the pelvic bottom has a heater.

[0066] (Supplementary Note 9) The pelvic bottom has a sensor for detecting the user's getting in and out of bed, and the bed device according to any one of Appendices 1 to 8.

[0067] (Appendix 10) A back bottom fixed to the back frame, A back bottom mounting jig fixed to the back bottom, A hip bottom fixed to the hip bottom mounting jig, The bed device according to any one of Appendices 1 to 9, further comprising

[0068] (Appendix 11) The bed device according to any one of Appendices 1 to 10, A replacement pelvic bottom mounting jig, A replacement pelvic bottom fixed at a position away from the connecting portion with the hip bottom mounting jig in the replacement pelvic bottom mounting jig, Comprising The hip bottom mounting jig can release the connection with the pelvic bottom mounting jig and can be rotatably connected to the replacement pelvic bottom mounting jig, The distance between the connecting portion and the replacement pelvic bottom in the replacement pelvic bottom mounting jig is different from the distance between the connecting portion and the pelvic bottom in the pelvic bottom mounting jig, and the bed device system.

[0069] (Appendix 12) A frame, A back frame movably provided with respect to the frame, A pelvic bottom, Comprising When the back frame angle of the back frame with respect to the frame is a first angle, the pelvic bottom angle of the pelvic bottom with respect to the frame is larger than the back frame angle, When the back frame angle is a second angle larger than the first angle, the pelvic bottom angle is smaller than the back frame angle, and the bed device.

Description of reference numerals

[0070] 1 Bed device 10 Frame 20 Back Frame 20a Lower End 20b Upper Surface 31 Hip Bottom Mounting Fixture 31a Connecting Portion 32 Pelvic Bottom Mounting Fixture 32a Connecting Portion 33 Back Bottom Mounting Fixture 33a Connecting Portion 41 Hip Bottom 42 Pelvic Bottom 42a Lower Surface 42b Lower Surface 42b Foot Side End 42c Head Side End 43 Back Bottom 44 Knee Bottom 45 Foot Bottom 50 Actuator 52 Heater 53 Sensor 56 Head Board 57 Foot Board 62 Pelvic Bottom 72 Pelvic Bottom 132 Replacement Pelvic Bottom Mounting Fixture 132a Connecting Portion 142 Replacement Pelvic Bottom 201 Bed Device D1, D2 Distance U User θb Back Frame Angle θp Pelvic Bottom Angle

Claims

1. A frame, a back frame movably provided with respect to the frame, the lower end of which moves cephalad with respect to the frame as the angle with respect to the frame increases, a lumbar bottom mounting jig fixed to the frame, a pelvic bottom mounting jig rotatably connectable to the lumbar bottom mounting jig, a pelvic bottom fixed at a position away from the connecting portion of the pelvic bottom mounting jig with the lumbar bottom mounting jig, comprising: when the pelvic bottom mounting jig is connected to the lumbar bottom mounting jig, when the back frame angle of the back frame with respect to the frame is a first angle, the back frame contacts the caudal end of the lower surface of the pelvic bottom, a bed device in which when the back frame angle is a second angle greater than the first angle, the back frame contacts the cephalad end of the lower surface of the pelvic bottom.

2. When the back frame angle is the first angle, the pelvic bottom angle formed by the lower surface of the pelvic bottom and the upper surface of the frame is greater than the back frame angle, The bed device according to claim 1, wherein when the back frame angle is the second angle, the pelvic bottom angle is smaller than the back frame angle.

3. The bed device according to claim 1, wherein the first angle is greater than 0 degrees and the second angle is smaller than 90 degrees.

4. The bed device according to claim 1, wherein when the back frame angle is 0 degrees, the entire lower surface of the pelvic bottom contacts the upper surface of the back frame.

5. The bed device according to claim 1, wherein when the back frame angle is a third angle greater than the first angle and smaller than the second angle, the back frame contacts the entire lower surface of the pelvic bottom.

6. further comprising a back bottom mounting jig fixed to the back frame, The bed device according to claim 1, wherein the pelvic bottom mounting jig can be disconnected from the lumbar bottom mounting jig and connected to the back bottom mounting jig.

7. The bed device according to claim 6, wherein when the pelvic bottom mounting jig is connected to the back bottom mounting jig, the pelvic bottom mounting jig is fixed to the back frame.

8. The bed device according to claim 1, wherein the pelvic bottom has a heater.

9. The bed device according to claim 1, wherein the pelvic bottom has a sensor for detecting the user's getting in and out of bed.

10. a back bottom fixed to the back frame, The back bottom mounting jig fixed to the back bottom, The waist bottom fixed to the waist bottom mounting jig, The bed device according to claim 1, further comprising.

11. The bed device according to any one of claims 1 to 10, A replacement pelvic bottom mounting jig, A replacement pelvic bottom fixed at a position away from the connecting portion of the replacement pelvic bottom mounting jig with the waist bottom mounting jig, Comprising, The waist bottom mounting jig can release the connection with the pelvic bottom mounting jig and can be rotatably connected to the replacement pelvic bottom mounting jig, A bed device system in which the distance between the connecting portion and the replacement pelvic bottom in the replacement pelvic bottom mounting jig is different from the distance between the connecting portion and the pelvic bottom in the pelvic bottom mounting jig.

12. A frame, A back frame movably provided with respect to the frame, A pelvic bottom, Comprising, When the back frame angle of the back frame with respect to the frame is the first angle, the pelvic bottom angle of the pelvic bottom with respect to the frame is larger than the back frame angle, A bed device in which when the back frame angle is a second angle larger than the first angle, the pelvic bottom angle is smaller than the back frame angle.

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