JP3380574B2 - Bed system - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bed system suitable for persons with physical disabilities.

[0002]

2. Description of the Related Art As a bed equipped with this type of defecation mechanism, the present inventor has already proposed the technology described in JP-A-63-168159 or JP-A-63-240859. In each of the above publications, the base laid on the bed is divided into a front base that receives the upper body of the patient and a rear base that receives the lower body, and the front edge of the front base is tilted during defecation, Position the patient by raising the front end of the rear base so that the buttocks are located at the opening between the front base and the rear base, and defecation is performed on the toilet bowl located under this opening. The technique to be performed is disclosed.

[0003]

As a result of further research and study based on the technique described in the above publication, the present inventor has found that the following technical problems still exist.

That is, a more stable posture during defecation provides a psychological sense of stability for a patient of this type to facilitate defecation, but the prior art gives sufficient consideration to this point. Was not done.

In other words, in the prior art, the bed is tilted or divided without considering the position of the patient sleeping on the bed at all. Therefore, depending on the situation, the posture during defecation is not stable, which may cause mental distress to the patient.

In addition, since the patient's buttocks at the opening of the bed are not stable, defecation is often performed in an unnatural posture. Furthermore, the above-mentioned conventional technology does not consider the patient's posture when returning to the bed state after defecation, and there is a concern that the buttocks of the patient after defecation may be sandwiched between the divided beds. Was there.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a bed system with a defecation mechanism that more stably regulates the body position of a patient and allows easy examination of defecation.

Still another object is to reduce the labor of the caregiver or patient by automating the operation during defecation.
Another object of the present invention is to provide a bed system that can regulate the position of the patient on the bed. Another object of the present invention is to provide a bed system capable of keeping the patient's body posture in a comfortable posture.

[0009]

SUMMARY OF THE INVENTION The present invention is directed to a patient's upper body and a front base 1 having a tiltable first anterior portion 11, and a patient's lower body, and a tiltable second body. A rear base 2 having a front portion 21, a toilet seat 7 for supporting a patient's buttocks, and a toilet 8 for receiving patient excrement.
And the toilet seat 7 is located between the rear edge of the front base 1 and the front edge of the rear base 2 when the second front portion 21 of the rear base 2 is tilted. 8 is located below the toilet seat 7, and the second front portion 21 of the rear base 2 is
A bed system with a defecation mechanism is provided in which the rear end of the second front portion 21 can be tilted / tilted while using the front end of the second front portion 21 as a support shaft, and tilted / tilted.

At least one of the front base 1 and the rear base 2 is provided so as to be movable in the front-rear direction, and the front base 1 is moved forward or the rear base 2 is moved rearward so that the toilet seat 7 is installed.
May be provided in an opening formed between the rear edge of the front base 1 and the front edge of the rear base 2 when the second front portion 21 of the rear base 2 is tilted.

Further, the front base 1 may be formed so as to be tiltable downward from a horizontal position. A pair of or a plurality of pairs of rollers 3 and 3 respectively provided near both sides of the front base 1, and a sheet 4 stretched between the rollers 3 and 3 and movable in the left-right direction by rotation of the rollers.
A body position regulating mechanism having a roller driving means 5 for driving the rollers 3 and 3 may be provided.

The toilet bowl 8 may be formed such that the upper surface of the toilet bowl 8 is opened and closed in association with the tilting and tilting of the second front portion 21 of the rear base 2. Further, a transparent window 61 for observing defecation is provided on the side surface of the toilet 8, and an illumination device 6 for irradiating the toilet 8 to the outside or inside of the transparent window 61.
6 and the image pickup device 67 for photographing the inside of the toilet 8 may be arranged.

Further, the toilet 8 has a water supply device 26 for supplying cleaning water for cleaning the inside of the toilet 8, a drainage device 28 for discharging cleaning water or excrement in the toilet 8, and a part for cleaning the local area of the user. It is desirable to provide the ejection device 25 for drying.

A position detecting sensor 1 provided near the front base 1 and the rear base 2 for detecting the position of the patient.
3, a central control unit 14 for inputting a signal from the position detection sensor 13, and a front base driving means 53 for moving the front base 1 and tilting / tilting the first front portion 11 thereof.
And a rear base drive means 18 that tilts and tilts the second front portion 21 of the rear base 2, and the central control unit 14 includes:
The signal from the position detection sensor 13 is analyzed to calculate a correction amount, which is used as a drive signal to notify the roller drive means 5 and the front base drive means 53 to regulate the body position of the patient and the front base drive means 53. A driving signal is output to the rear base driving means 18 to move and tilt the front base 1 forward and tilt the rear base 2, and the illumination device 66 and the imaging device 6 are driven.
It is also possible to output an operation signal to 7 and photograph the defecation in the toilet bowl 8.

[0015]

In the above-mentioned means, the front base 1 is moved forward or the rear base 2 is moved backward to tilt the first front portion 11 of the front base 1 and the second front portion 21 of the rear base 2. The second front portion 21 is tilted with the rear end 43 as a spindle. Further, by placing the buttocks on the toilet seat 7 located between the rear edge of the front base 1 and the front edge of the rear base 2, the posture during defecation is reliably regulated. At this time, the toilet 8 is located below the toilet seat 7 and receives the excrement of the patient.

When the second base portion 21 of the rear base 2 is tilted about the front end 42 of the second front portion 21 as a fulcrum when the bowel movement is not performed, a comfortable posture in which the lower half of the body is lifted can be taken. Further, according to the present invention, after the position detecting sensor detects the position of the patient on the base, the centralized control unit calculates the correction amount, and the body position adjusting mechanism regulates the body position of the patient according to the correction amount. Further, according to the present invention, the illumination device illuminates the toilet bowl, and the inside of the toilet bowl is imaged by the imaging device.

[0017]

Embodiments of the present invention will now be described with reference to FIGS. FIG. 1 is a schematic mechanism diagram of a bed system in this embodiment. The upper surface of the bed is the front base 1
And the rear base 2.

First, the structure around the front base 1 will be described. The front base 1 is a first base that can be tilted by a front base drive actuator 15 (front base drive means 53).
It is composed of a front portion 11 and a first rear portion 12 which can be moved forward and rearward by a front base moving motor 20 (front base drive means 53).

The first front portion 11 and the first rear portion 12 of the front base 1 are connected by a support shaft 41, and the movement to the front and rear is performed integrally. Also, the first front portion 11
Is tilted independently of the first rear portion 12 by the front base driving actuator 15 with the support shaft 41 as a fulcrum, and the front edge of the first front portion 11 by a cam mechanism or hydraulic / pneumatic pressure. It is possible to do.

Rollers 3 (3a, 3b) and rollers 3 (3) are provided on both sides of the first rear portion 12 of the front base 1, respectively.
a, 3b) are arranged, and the rollers 3, 3 are given a rotational force by a roller driving motor 5 as a roller driving means. Rollers 3a and 3b on one side and roller 3 on the other side
A sheet 4 is stretched between a and 3b, and the sheet 4 can be moved left and right by rotating the rollers 3 and 3 by the roller driving motor 5. That is, by rotating the rollers 3 and 3, the sheet 4 operates so as to be fed out or rolled up. Here, as shown in FIG. 4, the sheet 4 may have such a width that it can be laid under the waist of a patient in a bed.

Also, the first front portion 11 of the front base 1
With the support shaft 41 as a fulcrum, the front base drive actuator 15 can incline below the horizontal position. Therefore, when the patient's body is displaced toward the rear base 2 side, the body position can be easily returned to the front base 1 side by tilting the first front portion 11.

In the present embodiment, the seat 4 is provided only on the first rear portion 12 because the center of gravity of a human body in a sleeping state is slightly above the buttocks, so that the waist portion, which is the center of gravity of the body, is located. This is because the patient itself can be moved, that is, the body position can be regulated, by moving the seat 4 of the first rear portion 12 on which the user has been riding.

The seat 4 and the driving means for the seat 4 may be provided not only in the first rear portion 12 but also in the first front portion 11, the second front portion 21 and the like. Further, the body position adjusting mechanism according to the present embodiment can be used not only for defecation but also as a means for moving a patient during an examination, a sheet exchange, or the like.

Next, the periphery of the rear base 2 will be described. The rear base 2 includes a rear base drive actuator 18
It is composed of a second front portion 21 that can be tilted by (rear base driving means) and a second rear portion 22 that is separated from the bed body 100 by the tilted state of the second front portion 21. The second front portion 21 and the second rear portion 2 of the rear base 2
2 is connected by a support shaft 43, and the movement to the front and rear is performed integrally. A support shaft 42 is attached to the front end of the second front portion 21.

By the rear base driving actuator 18, the second front portion 21 is tilted and tilted independently of the second rear portion 22 with the support shaft 43 as a fulcrum, and the support shaft 42 is moved. As a fulcrum, the second front portion 21
The second rear portion 22 and the second rear portion 22 can be tilted and tilted together.

That is, as shown in FIG. 6, a support tool 70 is provided near the support shaft 42 and the support shaft 43, and the support tool 70 has inwardly bent claws 70a, 70 at both ends.
b. By moving the support tool 70 back and forth, a support shaft that can be separated from the bed body 100 can be selected.

That is, when the support tool 70 is located on the front side, the support shaft 43 is fixed by the claw 70b so that the front end side of the second front portion 21 can be tilted, and the support tool 70 is rearward. When it is located on the side, the support shaft 42 is fixed by the claws 70a, and the rear end side of the second front portion 21 can be tilted. The support tool 70 is formed to be movable in the front-rear direction by a support tool moving motor 71.

When the support shaft 42 is fixed and the rear end side of the second front portion 21 is tilted as shown in FIG. 3, the second rear portion 22 ascends in conjunction with the second front portion 21. Here, an actuator for directly supporting the second rear portion may be provided so that the rear base 2 can be tilted more stably with the support shaft 42 as a fulcrum.

At the front edge of the rear base 2, a sheet-shaped toilet seat 7 having an opening shape shown in FIG. 5 is provided in a direction substantially perpendicular to the rear base 2. The toilet seat 7 is usually held in a state of being wound by the roller 50,
The second front portion 21 is extended as it is tilted. The toilet seat 7 may be formed of a synthetic resin board having a certain degree of flexibility, instead of a windable sheet shape. In this case, it is advisable to form a slit for storing the board at the position of the roller 50 so that the board can move forward and backward.

A cover 6 made of synthetic resin is provided around the toilet seat 7 to protect the privacy of the patient and prevent the buttocks of the patient from being directly exposed to the outside air. The toilet seat 7 may be formed so as to be movable on both sides.

A stopper 23 is provided near the rear edge of the front base 1 so as to extend and contract toward the rear base 2.
At the time of defecation, the stopper 23 projects and the lower end of the toilet seat 7 (the front end in FIG. 2) is locked to prevent the toilet seat 7 from bending downward.

A toilet bowl 8 is arranged below the second front portion 21 of the rear base 2. The upper surface of the toilet bowl 8 is covered by a lid 24 that can be opened and closed, and when used as a bed, the lid 24 is pressed by the lower portion of the second front portion 21 of the rear base 2 as shown in FIG. Toilet bowl 8
The inner space is formed so as to be almost sealed.

The lid 24 has, for example, a spring-type spring structure centered around the shaft 63, and as shown in FIG. 2, the second front portion 21 of the rear base 2 is lifted during defecation. Along with that, the tip has a structure that opens upward. In the opened state, the inner surface of the lid body 24 is positioned so as to face the local area of the patient, and droplets of urine or the like are prevented from scattering into the mechanism of the bed.

A nozzle 25 is disposed in the toilet bowl 8 as a jetting device which also serves as a jet of dry air and a jet of water, so that the local area of the patient after defecation can be washed and dried. ing. Further, the nozzle 25 is normally housed in the wall of the toilet bowl 8 and is formed so as to extend into the toilet bowl 8 during operation.

A transparent window 61 is provided in a part of the toilet 8 so that the inside of the toilet 8 can be observed from the outside.
Outside the room, there is a TV camera lighting 66 (lighting device) and a TV.
A camera 67 (imaging device) is arranged. The TV camera illumination 66 may be arranged inside the toilet bowl 8. Further, as the TV camera 67, an image pickup device using a CCD or the like is preferable from the viewpoint of space utility. In addition to the case where the TV camera 67 is directly installed in the vicinity of the transparent window 61, the light receiving end of the optical fiber is provided in the vicinity of
The V camera 67 may be located at a remote location.

A flush nozzle 26, which is a water supply device for cleaning the toilet 8, is provided on the inner surface of the toilet 8. And
The defecation flushed with the flush water from the flush nozzle 26 is discharged from the drain pipe 27 at the lower part of the toilet 8 through a drain pump 28 as a drain device.

Further, an exhaust port 29 is provided on the side wall of the toilet bowl 8 so that the air in the toilet bowl 8 can be exhausted to the outside by an unillustrated exhaust fan. The air exhausted from the exhaust port 29 may be discharged to the outside through an exhaust pipe or a drain pipe, or may be returned to the room through a deodorizing device.

FIG. 4 is a schematic plan view of the bed system of this embodiment. As shown in the figure, the front end 1 and the side end of the front base 1 and the rear end and the side end of the rear base 2 are
Position detection sensors 13a and 13b including infrared sensors or ultrasonic sensors are provided so that the position of the patient on the base can be detected. As the position detection sensor, a plurality of pressure-sensitive sensors may be provided on the surface of the front base 1, and the weight distribution of the patient on the front base 1 may be measured to detect the position of the patient.

An operation panel 30 is provided on one side of the bed so that it can be operated by a doctor or a nurse. Also, assuming that the patient himself can operate,
A remote control 31 is provided, and a defecation request button 32
Then, defecation by the present system is possible only by operating the two buttons of the defecation end button 33.

Further, for a seriously ill patient in whom the remote control 31 is difficult to operate, the position detecting sensor 13 may measure the specific movement of the patient's head to activate the system. Alternatively, a pneumatic pressure sensitive switch may be provided to activate the system by allowing the patient to blow a specific number of breaths into a tube in communication with the pneumatic switch.

In this embodiment, the front base 1 and the rear base 2 are provided with mats on their upper portions, and the mats are covered with the sheets. However, the surface of the base itself may be formed as a mat. .

Next, the control system of this embodiment will be described. In this embodiment, the central control unit 1 is provided under the operation panel 30.
Have four. Although not shown, the centralized control unit 14 includes a memory for storing control parameters and the like, a CPU,
It is composed of a computer system having a bus connecting these and I / O, etc., and as shown in FIG. 7, each actuator, motor, etc. are analyzed and arithmetically processed by signals from the position detection sensor 13, remote controller 31 or operation panel 30. It has the function of operating and controlling the.

Here, the control procedure in the centralized control unit 14 will be described with reference to FIG. First, when the defecation request button 32 of the remote controller 31 is pressed, the detection signals from the position detection sensors 13a and 13b are sequentially input to the centralized control unit 14 (step 801). The centralized control unit 14 analyzes and arithmetically processes the detection signal to calculate the position correction amount of the patient on the bed. This correction amount (horizontal position correction amount) is first converted into a control amount of the roller driving motor 5 (802).

Based on this, the centralized controller 14 outputs a drive signal to the roller driving motor 5 to drive the roller driving motor 5 by a predetermined amount (803). As a result, the patient who was located to the left of the trained position is seat 4
Along with this, the patient who has been moved to the right by a predetermined amount is moved to the left together with the seat 4 by a predetermined amount.

Next, the centralized control unit 14 determines whether or not the front and rear positions of the patient need to be corrected (804). In this step 804, it is determined that the front base needs to be tilted only when the patient is positioned rearward. This is because when the patient is located closer to the front, position regulation may be performed when the front base is tilted in step 809 described later. That is, when the patient is located closer to the rear, the front base 1 is tilted downward from the horizontal position so that the patient can easily position the position (805). If the patient is in the proper position in the front-rear direction or is positioned near the front, the process proceeds to step 807.

Then, the centralized control unit 14 judges whether or not the position regulation of the patient is completed (806). If the position of the patient is still positioned to the left or right or behind the proper position, the process returns to step 802, and if the patient is in the proper position or is located only toward the rear, step 8
Move to 07.

The central control unit 14 is the front base moving motor 2
0 to drive the front base 1 forward by a predetermined amount (80
7) After that, the rear base driving actuator 18 is driven to raise (tilt) the second front portion 21 of the rear base 2 as shown in FIG. 2 (808). At this time, in this embodiment, the toilet seat 7 is also tilted in association with the second front portion 21 of the rear base 2 and enters under the buttocks of the patient.

Next, the centralized controller 14 outputs an actuation signal to the front base drive actuator 15 to raise (tilt) the front base 1 as shown in FIG. 2 (809).
At this time, according to the present embodiment, since the position of the patient has been corrected in advance by the body position adjusting mechanism as described above, the buttocks are accurately positioned with respect to the toilet seat 7.
In addition, when the patient is positioned near the front, the upper half of the patient gradually slides down as the front base 1 is tilted, and the buttocks are positioned with respect to the toilet seat 7.

When defecation is completed in this state and the patient presses the defecation end button 33 of the remote controller 31 (810), the TV camera illumination 66 is turned on (811) and the TV camera 67 is activated (812), TV camera 67 for defecation in the toilet 8
To shoot. By observing this photographed image on an external TV monitor or the like (not shown), it is possible to recognize the health condition of the patient, for example, the digestive power of the internal organs.

Further, the TV camera 67 may be an infrared temperature detection camera to detect the temperature distribution of defecation and the like. Furthermore, in order to perform a detailed inspection, an opening / closing door may be provided in a part of the window portion or the wall portion of the toilet bowl 8 to directly collect defecation.

When the inspection is completed, the central control unit 14 injects hot water from the nozzle 25 to the local area of the patient to wash it, and then sends hot air to dry it (813, 81).
4). Here, the warm air sent out is discharged to the outside from the exhaust port 29 by an air blower (not shown).

Further, pressure water is discharged from the water washing nozzle 26 into the toilet 8 and the drainage pump 28 is operated to wash the inside of the toilet 8 (915). Next, after the front base driving actuator 15 is controlled to return the front base 1 to the original horizontal state (916), the rear base driving actuator 18 is controlled to control the second front of the rear base 2. The portion 21 is lowered (917), the front base moving motor 20 is controlled to move the front base 1 backward (918), and the bed state shown in FIG. 1 is returned.

The second front portion 21 of the rear base 2
The lid 24 of the toilet 8 is completely closed by the downward movement of the air, and the air in the toilet 8 is exhausted from the exhaust port 29,
The odor after defecation does not diffuse into the hospital room.

The interior of the toilet 8 may be cleaned after the lid 24 is closed. At this time, prior to the water supply from the cleaning nozzle 26, the cleaning water may be jetted from the nozzle 25 to surely clean the back surface of the lid 24 and the like.

According to this embodiment, since the front base and the rear base are divided into the front part and the rear part, respectively, the rear part of the front base is placed in the horizontal position during the urination. Can be held. Therefore, the patient can reliably stabilize his / her posture during stool use, and the buttocks do not slip into the opening of the toilet bowl, and the buttock is sandwiched between the front base and the rear base after the stool is finished. Nor.

In this embodiment, when the position of the patient is corrected toward the front, the first front portion 11 of the front base 1 is tilted from the horizontal position, but the support shaft 4 of the second front portion 21 is tilted.
The second front portion 21 and the second rear portion 22 of the rear base 2 may be tilted and raised about the fulcrum 2 so that the patient can easily move forward.

Further, the front base 1 may be formed so that only the first front portion 11 can be tilted and tilted with the rear end of the front base as a fulcrum, instead of being tilted and tilted. In this case, the first
The relative angle between the first front portion 11 and the first rear portion 12 can be varied with the support shaft 41 as a center in a state in which the rear end of the rear portion 12 is tilted or tilted. The front base may be formed into an integral plate shape without being divided into a front part and a rear part, and the front base may be tilted and tilted with the rear end of the front base as a fulcrum.

[0058]

According to the present invention, it is possible to perform defecation with the patient's body position being reliably regulated. In addition, the operation during defecation can be automated, and the labor of the patient and the caregiver can be reduced. Further, according to the present invention, the body position of the patient on the base (bed) can be accurately regulated. Further, according to the present invention, it is possible to easily recognize the defecation state of the patient. Further, according to the present invention, the posture of the patient can be maintained in a comfortable posture.

[Brief description of drawings]

FIG. 1 is a schematic mechanical view of a bed system according to an embodiment of the present invention, showing a normal bed state.

FIG. 2 is a schematic mechanical view showing the bed system of the embodiment, and is a view showing a bed state at the time of toilet.

FIG. 3 is a schematic view showing another mode of the embodiment at a normal time.

FIG. 4 is a plan view of the bed system.

FIG. 5 is a plan view of the bed system at the time of urination.

FIG. 6 is a view showing a state of a support shaft and a support tool in a second front portion.

FIG. 7 is a block diagram showing a control system of this embodiment.

FIG. 8 is a flowchart showing a control procedure in the centralized control unit.

9 is a flowchart showing the continuation of FIG.

[Explanation of symbols]

1 ... front base 2 rear base 3 roller 4 seat 5 roller driving means 6 cover 7 toilet seat 8 toilet 11 first front portion 12 first Rear parts 13, 13a, 13b ··· Position detection sensor 14 · · Centralized control unit 15 · · Front base drive means (front base drive actuator) 18 · · Rear base drive actuator (rear base drive means) 20..Motor for moving front base (front base driving means) 21. Second front part 22. Second rear part 23. Stopper 24. Lid 25. Nozzle 26. Wash nozzle 27. -Drainage pipe 28-Drainage pump 29-Exhaust port 30-Operation panel 31-Remote control 32-Defecation request button 33-Defecation end buttons 41-43-Support shaft 53-Rear base drive means 61 ..Transparent window 66..Lighting device 67 .. Image apparatus 70 ... support 70a, 70b ... pawl 71 ... support moving motor

Continuation of front page (56) Reference JP-A-63-240859 (JP, A) JP-A-61-119264 (JP, A) JP-A-63-51859 (JP, A) JP-A-1-49557 (JP , A) JP 58-143751 (JP, A) JP-B 2-3-31979 (JP, B2) JP-B 60-55135 (JP, B2) JP-B 2-26492 (JP, Y2) (58) Fields surveyed (Int.Cl. ⁷ , DB name) A61G 7/02

Claims (4)

(57) [Claims] 1. A position detecting sensor for detecting a position of a patient on a base, a centralized control unit for inputting a signal from the position detecting sensor, a body position regulating mechanism for regulating a patient's body position, and a patient's upper body. First front part that can be tilted while receiving
And a front base having a minute portion, wherein the centralized control unit analyzes a signal from the position detection sensor to calculate a correction amount and outputs a drive signal to the body position adjusting mechanism to adjust the patient's body position. The posture adjusting mechanism tilts and tilts the first front portion.
And a front base drive means for moving the front base to the front and the rear with the first front portion.
A bed system characterized by being configured with an active first rear portion . 2. A front base for receiving the upper half of the patient and having a tiltable first front part, a back base for receiving the lower half of the patient and having a tiltable second front part, and a patient. A toilet seat for supporting the buttocks of the patient, a toilet for receiving excrement of the patient, a position detection sensor provided near the front base and the rear base for detecting the position of the patient, and a signal from the position detection sensor. Centralized control unit for input, front base drive means for moving the front base and tilting / tilting the first front part thereof, and rear base for tilting / tilting the second front part of the rear base. Driving means, a pair or a plurality of pairs of rollers respectively provided near both sides of the front base, a sheet stretched between the rollers and movable in the left-right direction by rotation of the rollers, and a roller for driving the rollers Driver , And a posture regulating mechanism including a, the centralized control unit analyzes signals from said position detecting sensor and calculating the correction amount, the roller drive means and the front base drive means as a drive signal Notify the patient's position and output a drive signal to the front base drive means and the rear base drive means to perform forward movement and tilting of the front base, and tilting of the rear base. A bed system characterized by outputting an operation signal to an illuminating device for irradiating and an image pickup device for photographing the inside of a toilet bowl to photograph defecation in the toilet bowl. 3. An anterior pedestal having a first anterior portion that is capable of receiving and tilting the upper half of the patient's body and a first posterior portion that is near the waist of the patient; A rear base having a front portion, a toilet seat for supporting the buttocks of the patient, and a toilet bowl for receiving the excrement of the patient, and when the second front portion of the rear base is tilted, the toilet seat is the front base. The toilet bowl is located between the rear edge and the front edge of the rear base, the toilet is located below the toilet seat, and the second front portion of the rear base supports the rear end of the second front portion. Bed system that can be tilted and tilted as well as tilted and tilted around the front end of the second front part as a spindle. 4. At least one of the front base and the rear base is provided so as to be movable in the front-rear direction, and the toilet seat is configured such that the front base moves to the front or the rear base moves to the rear. The bed system according to claim 3 , wherein the bed system is provided in an opening formed between a rear edge of the front base and a front edge of the rear base when the second front portion of the base is tilted. .