JP2024019135A - electric bed - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric bed that can supply electricity to the entire electric bed including the bed body and a wheel chair, by means of a battery installed in the wheel chair, when an external power source is unable to connect due to power failure or the like and unable to use, and that can be workable even in invalidation of the external power source.

SOLUTION: An electric bed of the present invention includes a bed body part and a wheel chair that can be integrated with the bed body part or separated from the bed body part. The bed also includes: a body part control circuit for controlling operation of the bed body part; a wheel chair control circuit for controlling operation of the wheel chair; and a battery that is installed in the wheel chair and that is electrically connected to the body part control circuit and the wheel chair control circuit respectively.

SELECTED DRAWING: Figure 5

COPYRIGHT: (C)2024,JPO&INPIT

Description

The present invention relates to the technical field of medical care equipment, and specifically relates to an electric bed.

With the advancement of an aging society with a declining birthrate, the number of bedridden elderly people requiring care and people with disabilities is increasing, while the number of young people who are responsible for providing care is decreasing, and the increasing burden of care has become a social issue. There is. As one of the means to solve these social issues, nursing care equipment is also becoming more intelligent and multifunctional. In the prior art, a separable bed is usually provided that includes a nursing bed body and a wheelchair portion that can be separated from the bed body. People in need of care, such as elderly people or people with disabilities, who use the above-mentioned detachable beds usually lie on the nursing care bed and use it as a normal bed, and if they need to move, they can be moved in a wheelchair by the caregiver. After moving the wheelchair to the nursing care bed, the wheelchair can be separated from the nursing care bed main body, allowing easy transfer and movement of the person in need of care.

For example, Patent Document 1 and Patent Document 2 both disclose a nursing care bed having a separable wheelchair structure, in which the nursing bed main body portion and the separable wheelchair portion are each electrically powered. It is driven by an actuator. Note that the detachable wheelchair section is individually provided with a wheelchair section battery power source for operating independently after the wheelchair is separated. Similarly, the main body of the nursing care bed is also equipped with a backup battery power source, and if an external power source cannot be connected due to a power outage, etc., the wheelchair can be driven using the battery power provided in the wheelchair. The nursing care bed main body can be driven using a battery power supply provided in the bed main body.

However, with the structure of the nursing bed described above, in case of an emergency such as a power outage where external power cannot be connected, it is necessary to install a battery power source in both the wheelchair part and the nursing bed body, which increases the cost. There is a problem with becoming. In addition, the backup battery of the nursing bed body is generally used only during power outages, and there are few situations in which the backup battery of the nursing bed body is used, and the usage time is not very long, resulting in a waste of equipment resources. Furthermore, the backup battery in the main body of the nursing care bed usually remains unused for a long period of time, so the backup battery itself deteriorates during that time, and there is a high possibility that it will not function as a backup battery when necessary, such as during a power outage.

Therefore, there is a need for an improved technical solution to solve the above-mentioned problems of conventional nursing care beds.

Patent No. 6726874 Patent No. 6722868

In order to solve the above problems, the present invention can supply power to the entire electric bed including the bed body and the wheelchair using the battery installed in the wheelchair when the external power source cannot be connected and used due to power outage etc. To provide an electric bed that can be operated even at times.

An electric bed according to the present invention is an electric bed comprising a bed main body and a wheelchair that can be combined with the bed main body or separated from the bed main body, and includes a main body control for controlling the operation of the bed main body. A wheelchair control circuit for controlling the operation of the wheelchair, and a battery provided in the wheelchair and electrically connected to the main body control circuit and the wheelchair control circuit, respectively.

According to the technical solution of the present invention, the bed main body and/or the wheelchair can be operated using batteries provided in the wheelchair and connected to the main body control circuit and the wheelchair control circuit, respectively. Specifically, when the wheelchair is separated from the bed body, the battery is used to supply power to the bed body as a power source for the bed body, thereby driving the bed body and performing the separation operation. At the same time, after the wheelchair is separated from the bed body, the battery can be used as a power source to supply power to the wheelchair, allowing the wheelchair to change its posture and move. In addition, when the wheelchair and the bed body are combined, or when they are combined, the battery serves as the power supply for the entire electric bed, and can supply power to the bed body and the wheelchair at the same time. Even if there is no electric bed, there will be no situation where the electric bed cannot be moved due to power outages, etc., and the bed body and wheelchair can be freely attached and detached. As a result, in the event of a power outage, it is possible to evacuate from the electric bed using a detachable wheelchair, rather than evacuating by transferring it onto another nursing care device. Additionally, if the bed is equipped with a backup battery, if it is not used for a long period of time, there will be concerns about whether it will be able to be used when needed, but by using the wheelchair battery that is used on a daily basis, the battery will be reliable even in the event of a power outage. It can function as Furthermore, there is no need to attach a backup battery to the bed main body, which can avoid wasting resources and reduce the overall cost of the electric bed.

Preferably, in the technical solution of the present invention, the electric bed further includes a power source installed in the bed body and electrically connected to the battery, the body control circuit, and the wheelchair control circuit, respectively.

According to the technical solution of the present invention, the power supply can be connected to an external power supply circuit, and the AC power supply can respectively supply power to the main body control circuit, the wheelchair control circuit, and the battery. As a result, if the wheelchair and the bed body are combined, or if they are combined, it becomes the power supply for the entire electric bed, and the bed body and the wheelchair can be powered at the same time. can be charged. Further, when the wheelchair is separated from the bed body, power can be supplied to the bed body as a power supply for the bed body.

Preferably, in the technical solution of the present invention, the electric bed further includes a power supply mode, which is provided in the main body part or the wheelchair part, and charges the battery and/or drives the wheelchair control circuit by supplying power from the power source; A switching unit is provided for switching to one of battery supply modes in which the main body control circuit is driven by power supply from the battery.

According to the technical proposal of the present invention, there is a power supply mode in which a battery is charged and/or a wheelchair control circuit is driven by power supply from a power supply provided in the bed body, and a power supply mode in which power is supplied from a battery provided in the wheelchair. Therefore, switching between the two types of supply modes can be safely realized by the switching unit without simultaneously performing the battery supply mode for driving the main body control circuit.

Furthermore, in the technical proposal of the present application, when the power supply is supplied with power, the switching unit of the electric bed switches to a power supply mode in which the battery is charged and/or the wheelchair control circuit is driven by the power supply from the power supply. If there is no power supply, the controller switches to a battery supply mode in which the main body control circuit is driven by power supply from the battery.

According to the technical solution of the present invention, the switching unit can automatically switch the power supply mode/battery supply mode depending on whether the power supply is receiving external power supply. When the power supply is receiving power, it can switch to power supply mode to supply power to the electric bed and charge the wheelchair battery. As a result, the battery can be charged periodically to ensure reliable operation even when there is no external power supply such as during a power outage, and deterioration of the battery can be prevented. By automatically switching to battery supply mode when the power supply is not receiving power supply, even if the electric bed experiences an unexpected situation such as a power outage, there will be no sudden shutdown due to loss of external power supply. , able to continue basic operations.

In the technical proposal of the present invention, the electric bed further has a connection part that combines and connects the bed main body and the wheelchair, and the main body control circuit and the wheelchair control circuit are connected to the connection circuit provided in the connection part. Connected via.

According to the technical proposal of the present invention, the connection part and the connection circuit provided in the connection part serve as an intermediate unit on the structure and circuit between the wheelchair and the bed body, and properly connect the wheelchair and the bed body. Connect to.

Preferably, in the technical solution of the present invention, a first diode is connected between the power source of the electric bed and the main body control circuit. The unidirectional conductivity of diodes limits the direction of current flow in the circuit at the power supply end, so if one side of the connection is not connected and accidentally comes into contact with a metal part and short-circuits, it will not cause smoke or smoke. It is possible to prevent the occurrence of dangerous events such as fire.

Furthermore, in the technical solution of the present invention, a switching circuit including a second diode, a third diode and a switch is provided in the switching part of the electric bed, the switching circuit is connected to the battery, and the fixed end of the switch is connected to the power source; The negative electrode of the second diode is connected to the positive electrode of the battery, the positive electrode of the second diode is connected to the first connection end of the switch, the positive electrode of the third diode is connected to the positive electrode of the battery, and the negative electrode of the third diode is connected to the positive electrode of the switch. It is connected to the second connection end.

According to the technical solution of the present invention, when the first connection end/second connection end of the switch is on, they correspond to the battery supply mode/power supply mode, respectively, that is, by simply using the switch, the battery supply mode /Automatic switching of power supply mode is realized. In the battery supply mode/power supply mode, the battery is in a discharging/charging state, respectively, and in the two modes, the current flow at the battery end is in the opposite direction, and the second diode and the second diode installed in the opposite direction 3 diodes limit the current direction in both modes.

Preferably, in the technical solution of the present invention, the electric bed turns off some operating functions of the electric bed in the battery supply mode, and/or reduces the efficiency and/or operating angle and/or operation of the operating functions of the electric bed. Limit speed.

According to the technical solution of the present invention, in the battery supply mode, some functions of the electric bed are turned off or limited, leaving only the basic functions of the electric bed to operate, thereby reducing the power consumption speed and allowing the battery supply mode to function. drive time can be extended.

FIG. 2 is a schematic diagram of the structure of the electric bed according to the embodiment of the present invention when the bed main body and the wheelchair are in a combined state. FIG. 2 is a schematic structural diagram of the electric bed according to the embodiment of the present invention when the bed main body and the wheelchair are in a separated state. FIG. 1 is a schematic structural diagram of a wheelchair according to an embodiment of the present invention in a flat state. 1 is a schematic structural diagram of a wheelchair according to an embodiment of the present invention in a seated state; FIG. 1 is a schematic diagram of a circuit structure of an electric bed according to an embodiment of the present invention.

Hereinafter, technical solutions in the embodiments of the present invention will be clearly and completely explained in accordance with the drawings in the embodiments of the present invention, but the described embodiments are only a part of the embodiments of the present invention, and all It is clear that this is not an embodiment of . Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts will fall within the protection scope of the present invention.

Note that the terms used here are used to describe specific embodiments, and do not limit the present invention. Here, unless the context clearly dictates otherwise, the singular forms "one", "one", and "said" also refer to the plural forms. In the description of this application, unless otherwise specified, "plurality" refers to two or more. It should be noted that when the terms "consisting of" and/or "comprising" are used herein, the presence of features, integers, steps, operations, elements and/or parts is specified, but the presence of other features, integers, steps, etc. , operations, elements, parts and/or groups are not excluded.

In order to fully understand the present invention, the detailed structure will be presented below to provide a detailed explanation of the technical solution proposed by the present invention. Preferred embodiments of the present invention will be described in detail below, but in addition to these, the present invention may have other embodiments.

[Structure of electric bed]
Hereinafter, the structure of the electric bed provided by the present invention will be explained. The structure of the electric bed according to the embodiment of the present invention will be described in more detail with reference to the drawings so that those skilled in the art can better understand the connection of the control circuit of the present invention. The present invention is not intended to limit the structure of the electric bed to which the method of the present invention is applied.

(1) Overall structure of electric bed First, FIG. 1 is a schematic structural diagram of a bed main body 1 and a wheelchair 2 in a combined state in an electric bed according to an embodiment of the present invention. FIG. 2 is a schematic structural diagram when the bed main body 1 and the wheelchair 2 of the electric bed according to the embodiment of the present invention are in a separated state.

As shown in Fig. 1, the bed main body 1 and the wheelchair 2 are combined to form a complete electric bed, and when the bed main body 1 and the wheelchair 2 are combined, the center of the electric bed is You can lie down and sleep in the room. In addition, as shown in FIG. 2, the wheelchair 2 can be separated from the bed body 1 from the side of the bed body 1, and after moving the care recipient from the center of the electric bed to the wheelchair 2 side, By separating the wheelchair 2 from the bed body 1, the care recipient can be easily transferred to the wheelchair 2. Furthermore, the electric bed formed by combining the bed body 1 and the wheelchair 2 may be an electric care bed used by a care recipient in, for example, a hospital, a nursing care facility, or a general home. In addition, in Fig. 1, the back side of the electric bed is the bed body 1 and the front side is the wheelchair 2, but conversely, the front side of the electric bed is the bed body 1 and the back side is the wheelchair 2. You can. Alternatively, the central part of the electric bed may be separated in the X-axis direction to form a wheelchair. That is, the structure in which the bed body 1 and the wheelchair 2 are separated is not limited to the form shown in FIG. 1, but may be any other structure.

(2) Structure of Bed Main Body Next, the structure of the bed main body 1 will be explained with reference to FIGS. 1 and 2. As shown in FIGS. 1 and 2, the bed main body 1 includes a frame 11, a bottom 12, and an operating mechanism (not shown).

Among them, the frame 11 is made of, for example, a metal pipe, and has a rectangular shape that is long in the X-axis direction as a whole, and a plurality of wheels for moving the bed main body 1 are provided at the lower end of the frame 11. 13 are provided. Further, a recess 14 is formed in the side of the frame 11 to accommodate a wheelchair main body 21 (described later) of the wheelchair 2.

The bottom 12 is for supporting the body of the care recipient who is lying down, and is installed on the frame 11. As shown in FIG. 2, the bottom 12 is installed in one half of the frame 11 in the transverse direction (Y-axis direction). The bottom 12 includes a bed main body backrest part 121, a bed main body seating part 122, a bed main body shin part 123, and a bed main body leg bottom part 124, which are connected to each other so as to be tiltable (rotatable) by a hinge or the like.

Among them, the bed main body backrest portion 121 is for supporting the head and back of the person requiring care. The bed main body seating portion 122 is for supporting the buttocks and thighs of the care recipient. The bed body shin portion 123 is for supporting the shin of the care recipient. The bed body foot bottom portion 124 is for supporting the feet of the person requiring care. Furthermore, a bendable cushion member (not shown) is attached above the bottom 12.

The actuation mechanism is generally installed under the frame 11 and includes, for example, an actuator and a controller for controlling the actuator. The controller is used to control the actuator to perform an expansion/contraction operation or a rotational operation according to a control signal sent from the remote controller, and the actuator is connected with a pin to the lower side of the bottom 12 and is connected to different parts of the bottom 12. drive to perform a tilting or rotating motion.

The operating mechanism may, for example, raise the bed body backrest 121 from a state in which the bottom 12 is in a flat position (see FIG. 1), or raise the bed body seat portion 122 and the bed in response to a remote control instruction from the care recipient. The connection point with the main body shank portion 123 can be raised, or the entire bottom 12 can be raised. Conversely, the bed main body backrest 121 can be lowered, the connecting portion between the bed main body seating part 122 and the bed main body shin part 123 can be lowered, or the entire bottom 12 can be lowered. Among them, the flat posture means that the bed main body backrest 121, the bed main seat seating section 122, the bed main body shin section 123, and the bed main body leg bottom section 124 are in a substantially horizontal posture (i.e., relative to the horizontal direction (X-axis direction) By setting the bottom 12 in a parallel or substantially parallel position, the entire bottom 12 is in a flat position.

(3) Structure of wheelchair Next, the overall structure of the wheelchair 2 will be explained with reference to FIGS. 1 to 4. First, FIG. 3 is a schematic structural diagram of the wheelchair 2 provided in the embodiment of the present invention in a flat state. FIG. 4 is a schematic structural diagram of the wheelchair 2 according to the embodiment of the present invention in a seated state. Note that in FIG. 4, illustration of the pair of armrests 23 is omitted for convenience of explanation.

The electric bed provided in the embodiment of the present invention includes a wheelchair 2 on which a care recipient can board, and the wheelchair 2 is separated from the bed body 1 to facilitate transfer and movement of the care recipient. We can support you. As shown in FIGS. 2 to 4, the wheelchair 2 provided in the present invention has a wheelchair main body 21, a wheelchair seat 22 supported by the wheelchair main body 21, and a wheelchair seat 22 that changes the posture of the wheelchair seat 22. and an operating mechanism.

The wheelchair main body 21 is formed of, for example, a metal pipe, and functions as the main frame of the wheelchair 2. A pair of front wheels and a pair of rear wheels (an example of the wheels 13) for moving the wheelchair 2 are provided at the lower end of the wheelchair body 21. Each of the pair of front wheels and the pair of rear wheels may be, for example, a swivel caster.

As shown in FIG. 3, a pair of guide posts 231 extending in the vertical direction (Z-axis direction) are attached to both sides of the wheelchair main body 21, respectively. A pair of armrests 23 is attached to each of the pair of guide posts 231 so as to be slidable in the vertical direction, and the armrests 23 are arranged on both sides of the wheelchair seating section 222, respectively. The pair of armrests 23 each have a space between a storage position located below the wheelchair seating part 222 (see FIG. 1) and a use position located above the wheelchair seating part 222 (see FIG. 2). It slides vertically along a pair of guide posts 231. When combining the wheelchair 2 and the bed body 1, the pair of armrests 23 are slid to the storage position, and when the wheelchair 2 is used separated from the bed body 1, the pair of armrests 23 are moved to the usage position. Slide it to .

The wheelchair seat section 22 is for supporting the body of the person in need of care who is seated (or lying down), and is supported by the wheelchair main body section 21 . The wheelchair seat section 22 includes a wheelchair backrest section 221, a wheelchair seat section 222, a wheelchair shank section 223, and a wheelchair leg bottom section 224, which are connected to each other so as to be tiltable (rotatable) by a hinge or a link. Among them, the wheelchair backrest part 221 is for supporting the head and back of the person requiring care. The wheelchair seating section 222 supports the buttocks and thighs of the care recipient, and one end of the wheelchair seating section 222 and the upper end of the wheelchair body section 21 are fixed. The wheelchair shin portion 223 is for supporting the shin of the care recipient. The wheelchair leg bottom portion 224 is for supporting the feet of the care recipient. Furthermore, a bendable cushion member (not shown) is attached to the wheelchair seat portion 22.

The operating mechanism of the wheelchair 2 is a mechanism for changing the posture of the wheelchair seat portion 22 between a flat posture (see FIG. 3) and a seated posture (see FIG. 4), and the operating mechanism is It may also include an actuator and a link mechanism. Note that the flat posture means that the wheelchair backrest portion 221, the wheelchair seat portion 222, the wheelchair shin portion 223, and the wheelchair foot bottom portion 224 are placed in a substantially horizontal posture, thereby making the entire wheelchair seat portion 22 of the wheelchair 2 flat. Become a posture. The sitting posture is a posture in which the person requiring care can sit by tilting or rotating each of the wheelchair backrest portion 221, wheelchair seat portion 222, wheelchair shin portion 223, and wheelchair leg bottom portion 224 with respect to the horizontal direction. .

As shown in FIG. 1, when combining the wheelchair 2 of the electric bed and the bed body part 1, the wheelchair seat part 22 of the wheelchair 2 and the bottom 12 of the bed body part 1 are each in a flat position. , the wheelchair 2 is brought close to the bed body 1 and the wheelchair body 21 is fitted into the recess 14 of the frame 11. At this time, the wheelchair seat portion 22 is located in the half of the frame 11 in the lateral direction. As a result, the wheelchair backrest portion 221, wheelchair seating portion 222, wheelchair shin portion 223, and wheelchair leg bottom portion 224 of the wheelchair 2 are connected to the bed body back portion 121, the bed body seating portion 122, and the bed body shin of the bed body portion 1, respectively. 123 and the bed body foot bottom part 124 adjacent to the electric bed in the transverse direction. In addition, when the wheelchair 2 of the electric bed and the bed main body part 1 are combined, the wheelchair seat part 22 of the wheelchair 2 is controlled by the operating mechanism of the bed main body part 1 or the operating mechanism of the wheelchair 2. , it comes to operate integrally with the bottom 12 of the bed main body part 1.

On the other hand, as shown in FIG. 2, when separating the wheelchair 2 of the electric bed from the bed main body 1, the care recipient is first moved to the wheelchair 2 side, and the care recipient is made to lie down on the wheelchair seat 22. . Thereafter, the wheelchair main body 21 is removed from the recess 14 of the frame 11 of the bed main body 1, and the posture of the wheelchair seat surface 22 is changed from the flat posture to the seated posture.

(Embodiment)
FIG. 5 is a schematic diagram of the circuit structure of the electric bed according to the embodiment of the present invention.

As shown in FIG. 5, the electric bed according to the present invention is an electric bed comprising a bed main body 1 and a wheelchair 2 that can be combined with the bed main body 1 or separated from the bed main body 1. a main body control circuit 10 for controlling the wheelchair 1; a wheelchair control circuit 20 for controlling the operation of the wheelchair 2; and a wheelchair control circuit 20 for controlling the operation of the wheelchair 2; It further includes a battery 3.

According to the technical proposal of the present invention, the bed main body 1 and/or the wheelchair 2 are operated using the battery 3 provided in the wheelchair 2 and electrically connected to the main body control circuit 10 and the wheelchair control circuit 20, respectively. can be done. Specifically, when the wheelchair 2 is separated from the bed main body 1, the bed main body 1 is driven by supplying power to the main body control circuit 10 as a power source for the bed main body 1 using the battery 3. In addition to being able to perform a separation operation, after the wheelchair 2 is separated from the bed body 1, the battery is used to supply power to the wheelchair control circuit 20 as a power source for the wheelchair 2, thereby controlling the posture change and movement of the wheelchair 2. It can be carried out. Furthermore, when the wheelchair 2 and the bed main body 1 are in a combined state, the battery 3 serves as a power source for the entire electric bed, and can simultaneously supply power to the main body control circuit 10 and/or the wheelchair control circuit 20, Even if there is no power supply, the electric bed will not be unable to move due to a power outage or the like, and the bed body 1 and the wheelchair 2 can be freely attached and detached. As a result, in the event of a power outage, the wheelchair 2 can be separated from the bed body 1 and evacuated instead of being transferred onto another nursing care device. In addition, if the bed main body 1 is equipped with a backup battery, if it is not used for a long period of time, it becomes uncertain whether it can actually be used when needed. It can function as a battery. Furthermore, there is no need to attach a backup battery to the bed main body 1, which avoids waste of resources and reduces the overall cost of the electric bed.

Preferably, in the embodiment of the present invention, the electric bed further includes a power source 4 provided in the bed body 1 and electrically connected to the battery 3, the body control circuit 10, and the wheelchair control circuit 20, respectively.

Specifically, in the embodiment of the present invention, the power source 4 has one end connected to an external power supply circuit, and the other end forms a circuit with the battery 3, the main body control circuit 10, and the wheelchair control circuit 20, respectively, and connects to the external power supply circuit. Electric power can be supplied to the main body control circuit 10, the wheelchair control circuit 20, and the battery 3, respectively, by the AC power supplied from the power supply circuit. As a result, when the wheelchair 2 and the bed body part 1 are combined, or if they are combined, it becomes the power supply for the entire electric bed, and power can be supplied to the bed body part 1 and the wheelchair 2 at the same time, and the wheelchair 2 The battery 3 installed in the battery 3 can be charged. Further, when the wheelchair 2 is separated from the bed main body 1, the power source 4 can supply power to the bed main body 1 as a power supply for the bed main body 1.

Preferably, in the embodiment of the present invention, the electric bed further includes a switching part 5, and the switching part 5 is provided in the bed main body part 1 or the wheelchair 2. In the embodiment shown in FIG. It is installed in wheelchair 2. The switching unit 5 has a power supply mode in which the battery 3 is charged and/or the wheelchair control circuit 20 is driven by the power supply from the power source 4, and a battery supply mode in which the main body control circuit 10 is driven by the power supply from the battery 3. You can switch to any of the modes.

According to the technical proposal of the present invention, there is a power supply mode in which the battery 3 is charged and/or the wheelchair control circuit 20 is driven by power supply from the power supply 4 provided in the bed body 1; Switching between the two types of supply modes can be safely achieved by the switching unit 5 without simultaneously performing the battery supply mode in which the main body control circuit 10 is driven by power supply from the battery 3.

Specifically, the switching unit 5 is not particularly limited, and may be a program, device, or circuit that automatically switches circuits in response to signals such as determination signals and trigger signals, and may be a key, remote controller, etc. It may be a program, circuit, or device that manually triggers a signal, or it may be a combination of a plurality of the above means.

Furthermore, in the embodiment of the present application, when the power supply 4 is supplied with power, the switching unit 5 of the electric bed charges the battery 3 and/or drives the wheelchair control circuit 20 using the power supply from the power supply 4. mode, and if there is no power supplied to the power source 4, the mode is switched to a battery supply mode in which the main body control circuit 10 is driven by power supplied from the battery 3.

According to the mode switching described above, the switching unit 5 can automatically switch the power supply mode/battery supply mode depending on whether the power supply 4 is receiving external power supply. When the power supply 4 is receiving power supply, it is possible to switch to the power supply mode and supply power to the electric bed, and also to charge the battery 3 of the wheelchair and/or drive the wheelchair control circuit 20. As a result, the battery can be charged periodically to ensure reliable operation even when there is no external power supply such as during a power outage, and deterioration of the battery can be prevented. By automatically switching to the battery supply mode when the power supply 4 is not receiving power supply, the main body control circuit 10 can be driven by power supply from the battery 3. As a result, even if an unexpected situation such as a power outage occurs, the electric bed can continue its basic operations without suddenly shutting down due to loss of external power supply.

More preferably, in an embodiment of the invention, the electric bed turns off some operating functions of the electric bed in the battery supply mode, and/or reduces the efficiency and/or operating angle and/or of the operating functions of the electric bed. Limit operating speed.

Specifically, the electric bed can perform all operating functions in the powered mode. On the other hand, in battery supply mode, some functions of the electric bed are restricted in order to reduce power consumption and extend battery run time. For example, in a state where the wheelchair 2 and the bed body part 1 are combined, the operation of reducing the angle between the bed body back part 121 and the wheelchair back part 221 is permitted because it requires less product power, but it requires more power consumption. Do not allow movements that increase the angle that is necessary, and turn off the movement function. For example, in the state where the wheelchair 2 and the bed body part 1 are combined, only a slow movement is allowed as an operation that requires less power consumption to change the angle of the bed body backrest part 121 and the wheelchair backrest part 221. In this way, in the battery supply mode, by turning off some operating functions or limiting the operating functions, it is possible to suppress power consumption and extend the battery drive time.

Preferably, in the embodiment of the present application, the electric bed further includes a connecting part 6 that connects the bed main body part 1 and the wheelchair 2, and the main body part control circuit 10 and the wheelchair control circuit 20 are connected to the connecting part 6. They are connected via a connection circuit 60 provided.

According to the above embodiment, the connection part 6 and the connection circuit 60 provided in the connection part 6 serve as an intermediate unit in the structure and circuit between the wheelchair 2 and the bed body part 1. Properly connect between.

Normally, the wheelchair 2 and the bed main body 1 can be directly attached or connected, and the main body control circuit 10 and the wheelchair control circuit 20 provided in the bed main body 1 and the wheelchair 2, respectively, Electrical connection can be made between the part 1 and the wheelchair 2 through structures such as contacts, pins, cables, etc.

In addition, the connection part 6 in this embodiment may be a cable connector structure which connects between the bed main body part 1 and the wheelchair 2 similarly. For example, when the wheelchair 2 and the bed main body part 1 are combined, if the remaining battery 3 of the wheelchair 2 is low and the wheelchair 2 cannot be changed from a sitting position to a flat position, the connecting part 6 having a cable connector structure is connected to the bed. If the main body part 1 and the wheelchair 2 can be connected, the wheelchair 2 can be operated by supplying power from the power supply 4 to which an external power supply is supplied, and the wheelchair 2 can be placed in a flat position. As a result, even if a situation occurs where the wheelchair 2 cannot be combined with the bed main body part 1 due to a dead battery, the wheelchair 2 can be connected to the bed main body part 1 by connecting with the connecting part 6 which has a cable connector structure. Can be combined. On the other hand, if there is no external power supply to the power source 4 of the bed body 1 due to a power outage or the like and the wheelchair 2 cannot be separated from the bed body 1, the bed body 1 and the wheelchair 2 can be connected to each other using the connection part 6, which has a cable connector structure. If it is possible to connect between the two, the battery 3 of the wheelchair 2 will be used to supply power to the main body control circuit 10, the bed main body 1 will be operated, the wheelchair 2 will be separated, and the wheelchair 2 will be able to move the person in need of care. They can be evacuated. That is, even if an emergency situation such as a power outage occurs, the entire electric bed can be easily powered and operated using the battery 3 of the wheelchair 2.

Preferably, in the embodiment of the present invention, the first diode _D1 is connected between the power source 4 of the electric bed and the main body control circuit 10, and the positive electrode of the first diode _D1 is connected to the power source 4 side. The negative electrode is connected to the main body control circuit 10, the wheelchair control circuit 20, and the battery 3 side. The unidirectional conductivity of the diode limits the direction of current flow in the circuit at the power supply end, so even if one of the connections 6 is not connected and accidentally comes into contact with a metal part and short-circuits, smoke will not be generated. It is possible to prevent the occurrence of dangerous events such as fire and fire.

Furthermore, in the embodiment of the present invention, the switching unit 5 of the electric bed is provided with a switching circuit 50 including a second diode D ₂ , a third diode D ₃ and a switch K, the switching circuit 50 is connected to the battery 3, and the switch The fixed end of K is connected to the power supply 4, the negative pole of the second diode _D2 is connected to the positive pole of the battery 3, the positive pole of the second diode _D2 is connected to the first connection end of the switch K, and the third diode D The positive electrode of the third diode _D3 is connected to the positive electrode of the battery 3, and the negative electrode of the third diode _D3 is connected to the second connection end of the switch K.

According to the above circuit structure of the present invention, when the first connection end/second connection end of the switch K is on, they correspond to the battery supply mode/power supply mode, respectively. Automatic switching between battery supply mode/power supply mode is realized.

In FIG. 5, the switch K is shown as a single-pole double-throw switch, but in actual use, there is no particular limitation, and other elements such as a switch tube, chips, or circuits may be used to control the battery supply mode/power supply. An automatic supply mode switching function may also be implemented.

Specifically, in the power supply mode, the battery 3 is in a charging state, and a charging circuit of power source 4 - first diode D ₁ - second diode D ₂ - battery 3 positive electrode is formed, and at this time, current flows from battery 3 flows to the positive electrode of In the battery supply mode, the battery 3 is in a discharge state, and a discharge circuit of the battery 3 - third diode D ₃ - main body control circuit 10 and/or battery 3 positive electrode - wheelchair control circuit 20 is formed, and at this time, the current is It flows out from the positive electrode of battery 3. From the above, in the two types of supply modes, the current flow direction of the battery 3 is opposite, and the second diode D ₂ and third diode D ₃ provided in the opposite direction limit the current direction in the two types of supply modes. can do.

Note that in this specification, the reference to "embodiment" indicates that the specific feature, structure, function, or characteristic described in conjunction with this embodiment is included in at least one embodiment of the present invention. .

Therefore, the terms "in an embodiment" in various descriptions of this specification do not necessarily all refer to the same embodiment of the present invention. Additionally, the particular features, structures, functions, or characteristics may be combined in any suitable form in one or more embodiments.

In addition, although the technical solution of the present invention has been described in conjunction with the drawings, those skilled in the art will easily understand that the protection scope of the present invention is not limited to these specific embodiments. Without departing from the principle of the present invention, a person skilled in the art can make equivalent changes or substitutions to the relevant technical features, and any technical solutions after these changes or substitutions will not be covered by the protection of the present invention. Included in the range. It should be noted that the protection scope of the present invention also includes arbitrary combinations of two or more claims from among the plurality of claims stated in the scope of claims as of the filing of this application, within the scope of technical contradiction. For example, when a dependent form claim stated in the scope of claims as of the filing of the present application is made into a multiple claim or multiple multi-claim so as to cite all of the superordinate claims to the extent not technically contradictory, the multiple A claim or a combination of all claims included in multiple claims also falls within the protection scope of the present invention.

1 Bed body part 10 Body part control circuit 11 Frame 12 Bottom 121 Bed body backrest part 122 Bed body seating part 123 Bed body shin part 124 Bed body leg bottom part 13 Wheel 14 Recessed part 2 Wheelchair 20 Wheelchair control circuit 21 Wheelchair body part 22 Wheelchair Seat section 221 Wheelchair backrest section 222 Wheelchair seating section 223 Wheelchair shin section 224 Wheelchair leg bottom section 23 Armrest 231 Guide post 3 Battery 4 Power source 5 Switching section 50 Switching circuit 6 Connection section 60 Connection circuit D ₁ First diode D ₂ Second diode D ₃ 3rd diode K switch

Claims (9)

An electric bed comprising a bed main body and a wheelchair that can be separated from the bed main body, a main body control circuit for controlling the operation of the bed main body, and a wheelchair control circuit for controlling the operation of the wheelchair. and a battery provided in the wheelchair and electrically connected to the main body control circuit and the wheelchair control circuit, respectively. The electric bed according to claim 1, further comprising a power source provided in the bed body and electrically connected to the battery, the body control circuit, and the wheelchair control circuit, respectively. a power supply mode that is provided on the bed main body or the wheelchair and charges the battery and/or drives the wheelchair control circuit by supplying power from a power source; The electric bed according to claim 2, further comprising a switching unit for switching to one of the battery supply modes for driving the electric bed. The switching unit switches to a power supply mode in which the battery is charged and/or the wheelchair control circuit is driven by the power supply from the power supply when the power supply is supplied with power, and the switching unit is configured to switch to a power supply mode in which the battery is charged and/or the wheelchair control circuit is driven by the power supply from the power supply, and the switching unit is configured to switch to a power supply mode in which the battery is charged and/or the wheelchair control circuit is driven by the power supply from the power supply, and when the power supply is not supplied with power. 4. The electric bed according to claim 3, wherein the electric bed is switched to a battery supply mode in which the main body control circuit is driven by power supply from the battery. The electric bed according to any one of claims 1 to 3, further comprising a connection part that combines and connects the bed main body part and the wheelchair. The electric bed according to claim 5, wherein the main body control circuit and the wheelchair control circuit are connected via a connection circuit provided in the connection part. The electric bed according to claim 4, wherein a first diode is connected between the power source and the main body control circuit. A switching circuit including a second diode, a third diode, and a switch is provided in the switching section, the switching circuit is connected to the battery, a fixed end of the switch is connected to the power source, and a negative electrode of the second diode is connected to the battery. The second diode is connected to the positive electrode of the battery, the positive electrode of the second diode is connected to the first connection end of the switch, the positive electrode of the third diode is connected to the positive electrode of the battery, and the negative electrode of the third diode is connected to the switch. The electric bed according to claim 7, wherein the electric bed is connected to the second connecting end of the electric bed. Claim characterized in that, in the battery supply mode, some operating functions of the electric bed are turned off and/or the efficiency and/or operating angle and/or operating speed of the operating functions of the electric bed are limited. 4. The electric bed described in 4.