JP7804306B2 - Electric bed and electric wires - Google Patents

Description

The present invention relates to an electric bed and an electric wire.

Most electric beds are designed to be easily disassembled and reassembled for ease of transportation, storage, and loading and unloading into homes and buildings. Electric nursing care beds, particularly those used in hospitals and nursing care facilities, are structurally more complex, more expensive, and have a shorter lifespan than regular beds, so they are often rented to end users. Rental companies for electric nursing care beds frequently disassemble and reassemble the beds. Assembly work involves assembling the electric bed and wiring the electrical wires that connect to the electrical equipment.

However, this wiring work requires workers to secure the wires to the cord clips and route them along a specified path to prevent them from getting pinched by the moving mechanism, which places a significant burden on the worker.

The object of the present invention is to provide an electric bed and electrical wires that can reduce the wiring work required during assembly and significantly reduce the burden on workers.

An electric bed according to one embodiment has at least one first component and a second component, which can be assembled and disassembled. The first component has a first electric device and a movable mechanism driven by the first electric device. The second component has a second electric device that is electrically connectable to the first electric device and drives the movable mechanism. A first electric wire is connected to the first electric device, and a second electric wire is connected to the second electric device. At least one location of the first electric wire is fixed to the first component, and at least one location of the second electric wire is fixed to the second component. When the first component and the second component are assembled, a first connector provided on an end of the first electric wire and a second connector provided on an end of the second electric wire are positioned close enough to be connected to each other, and the first and second electric wires are arranged so that they do not break even when the movable mechanism is moved with the first and second connectors connected.

The first connector and the second connector may be configured to be connected to each other simultaneously when the first part and the second part are assembled.

A portion of the first electric wire and/or the second electric wire may be formed from a curled cord.

The first electric wire and/or the second electric wire may be provided with a winding section that automatically winds and stores the electric wire.

The first connector and/or the second connector may have a mechanism to prevent disconnection after connection.

The first connector and the second connector may have a waterproof mechanism to prevent water from entering the interior.

An electric bed according to one embodiment is an electric bed having an electric movable mechanism, and comprises a bed frame on which the movable mechanism is mounted, a control unit mounted on the bed frame and controlling the movable mechanism, and an electric wire for a hand switch connected to the controller, the electric wire being branched, with one branch being fixed at least at one point to the bed frame on one widthwise side of the control unit, and the other branch being fixed at least at one point to the bed frame on the other widthwise side of the control unit.

An electric bed according to one embodiment has at least one first part and a second part, which can be assembled and disassembled. The first part has a first electric device and a movable mechanism driven by the first electric device. The second part has a second electric device that can be electrically connected to the first electric device and drives the movable mechanism. One end of an electric wire is connected to the second electric device, and the second electric device has a disconnection prevention mechanism that prevents the electric wire from being disconnected. After the first part and the second part are assembled, the other end of the electric wire is connected to the first electric device.

The electric wire may be fixed to the second component at at least one point.

A portion of the electric wire may be made of a curled cord.

The electric wire may be provided with a winding section that automatically winds and stores the electric wire.

The electric wire according to one embodiment is connected to an electric device for driving the moving mechanism of an electric bed, and comprises a cord, a first connector provided at one end of the cord for connecting to the electric device, and a second connector provided at the other end of the cord for connecting to the connector of another electric wire, and has a waterproof mechanism to prevent water from entering the interior.

The second connector may have a mechanism to prevent it from coming loose after being connected to a connector for another electric wire.

The present invention provides an electric bed and electrical wires that can reduce the amount of wiring work required during assembly and significantly reduce the burden on workers.

Schematic diagram of an electric bed according to this embodiment. Exploded view of the electric bed in Figure 1 FIG. 4A and 4B are explanatory diagrams of a control unit, in which FIG. 4A shows a state in which the cover is open, and FIG. 4B shows a state in which the cover is closed. 4A and 4B are perspective views of electric wires, in which FIG. 4A shows a state in which motor electric wires and relay electric wires are not connected, and FIG. 4B shows a state in which motor electric wires and relay electric wires are connected. FIG. 10 is an explanatory diagram of a wiring path of an electric wire according to a modified example. 10A and 10B are perspective views of a first motor electric wire according to a modified example, in which FIG. 10A shows a state in which a cover portion is open, and FIG. 10B shows a state in which the cover portion is closed. FIG. 10 is an explanatory diagram of a second relay wire according to a modified example. FIG. 10 is an explanatory diagram of a second relay wire according to a modified example. FIG. 10 is an explanatory diagram of an electric wire according to a modified example.

One embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic diagram of an electric bed 1 according to this embodiment.
FIG. 2 is an exploded view of the electric bed 1 of FIG.
FIG. 3 is an exploded view of the frame portion 10. As shown in FIG.

The electric bed 1 according to one embodiment shown in Figures 1 and 2 is a nursing care bed used, for example, in hospitals and nursing care facilities. The electric bed 1 is formed in a vertically elongated, approximately rectangular shape in a plan view to support the body of a recumbent person.

The electric bed 1 comprises a frame 10 placed on the floor (not shown), a bottom 20 attached to the top of the frame 10, a headboard 30 and a footboard 31 erected at the front and rear ends of the frame 10, respectively, and a hand switch 2 for operating the movable mechanism (described below). In the following description, the "front-to-back direction" refers to the direction from upper left to lower right in FIG. 1, i.e., the lengthwise direction of the electric bed 1, with the upper left being the front and the lower right being the rear. The "left-to-right direction" refers to the direction from lower left to upper right in FIG. 1, i.e., the widthwise direction of the electric bed 1, with the lower left being the left and the upper right being the right in FIG. 1. Furthermore, the "up-to-down direction" refers to the top-to-bottom direction in FIG. 1, i.e., the vertical direction of the electric bed 1, with up being up and down being down. Axes indicating directions will be shown in the figures as appropriate below.

As shown in Figures 2 and 3, the frame section (bed frame) 10 has a base frame 11, a head frame 12, a center frame 13, and a foot frame 14 attached to the top of the base frame 11, and four fixed legs 15 placed on the floor (not shown) and attached to the four corners of the base frame 11. The fixed legs 15 stand on the floor and support the base frame 11 from below. The base frame 11, head frame 12, center frame 13, and foot frame 14 are made of steel, and their detailed configurations will be described later.

As shown in Figures 1 and 2, the bottom 20 supports a bed mattress (not shown) from below and has multiple bottom elements, such as a back bottom 21, a waist bottom 22, a knee bottom 23, and a leg bottom 24. The angles between the bottom elements 21 to 24 are variable, allowing the bottom 20 to bend. For example, the angles of the back bottom 21, the knee bottom 23, and the leg bottom 24 relative to the waist bottom 22 are variable. The bottom 20 is made of, for example, steel or synthetic resin.

When transporting or storing the electric bed 1, it is disassembled into several main components, including the base frame 11, head frame 12, center frame 13, foot frame 14, back bottom 21, waist bottom 22, knee bottom 23, leg bottom 24, and other components (description omitted). When these separated components are interconnected, the completed electric bed 1 is assembled as shown in Figure 1.

Next, we will explain the base frame 11, head frame 12, center frame 13, and foot frame 14.

As shown in Figure 3, the base frame 11 includes a first base 11A that is placed on the floor (installation surface), an X-link mechanism 11B that serves as a lifting mechanism (movable mechanism), and a first actuator 11C.

The first base 11A has a pair of front and rear bars 110 extending in the front-rear direction and spaced a predetermined distance apart in the left-right direction, and a pair of left and right bars 111 attached to the front and rear of the front and rear bars 110 and connecting the front and rear bars 110. Fixed legs 15 (Figure 2) are attached to the front and rear ends of the front and rear bars 110, respectively, as shown in Figure 1. A guide member 112 is provided on the rear inside of the pair of front and rear bars 110. The guide member 112 supports the connecting bar 115A of the X link mechanism 11B so that it can slide in the front-rear direction relative to the first base 11A.

The X-link mechanism 11B is provided on the first base 11A. The X-link mechanism 11B mainly comprises a pair of first and second links 113 and 114, and multiple connecting bars 115A, 115B, and 115C. Each first link 113 and each second link 114 extends in the front-to-rear direction, and is rotatably connected to each other at approximately the center in the front-to-rear direction by a pin 116. In other words, each pair of first links 113 and second links 114 is connected to each other in an X-shape in side view, with the pin 116 as the axial center. Pairs of first links 113 and second links 114 are provided with a gap between them in the left-to-right direction.

The rear end of each second link 114 is connected to a connecting bar 115A extending in the left-right direction. The connecting bar 115A is supported on the guide member 112 so as to be slidable in the front-rear direction. The front end of each second link 114 is connected to a connecting bar 115B extending in the left-right direction. The rear end of each first link 113 is connected to a connecting bar 115C extending in the left-right direction. The front end of each first link 113 is rotatably connected to the front left-right bar 111.

A support bar 117 is connected to the front-rear bar 110 behind the rear left-right bar 111. A first actuator 11C for driving the X-link mechanism 11B is provided in the center of the support bar 117. The first actuator 11C has a first electric motor 118A and a first rod 118B that is movable forward and backward by the first electric motor 118A. The tip of the first rod 118B is connected to the rear end of the first link 113 via the connecting bar 115C. Therefore, the forward and backward movement of the first rod 118B of the first actuator 11C moves the connecting bar 115C up and down. This drives the X-link mechanism, and the vertical positions of the upper ends of each first link 113 and each second link 114 change in tandem. In this way, each first link 113 and each second link 114 rotates and rises, raising the center frame 13 relative to the base frame 11.

A first motor wire 50 is connected to the first electric motor 118A. Details of the first motor wire 50 will be described later.

The head frame 12 includes a second base 12A, an arm mechanism 12B as a raising/lowering mechanism (movable mechanism), and a second actuator 12C.

The second base 12A has a pair of front and rear bars 120 extending in the front-rear direction and spaced a predetermined distance apart in the left-right direction, and a pair of left and right bars 121 located at the front and center of the front and rear bars 120, respectively, and connecting the front and rear bars 120.

The arm mechanism 12B is provided in the center of the left and right bars 121 located on the rear side. The arm mechanism 12B comprises a back-raising arm 122, a shaft 123, and a pair of rollers 124. The back-raising arm 122 extends in the front-to-rear direction and is rotatably provided in the center of the rear left and right bars 121. The shaft 123 is provided at the tip of the back-raising arm 122. Each roller 124 is rotatably provided at both ends of the shaft 123.

The second actuator 12C has a second electric motor 125 and a second rod 126 that is movable forward and backward by the second electric motor 125. The tip of the rod 126 is rotatably attached to the center of the back-raising arm 122. The back-raising arm 122 is rotated and raised or lowered by the forward and backward movement of the rod 126 of the second actuator 12C . The back-raising arm supports the back bottom 21 from below, so the back bottom 21 can be raised or lowered by the second actuator 12C.

A first engagement portion 127 is provided at the rear end of each front and rear bar 120. The first engagement portion 127 is formed in a concave shape that opens toward the rear, and engages to accommodate the front protrusion 134A on the outer surface of each front and rear bar 130. Each front and rear bar 120 is formed with a through-hole 120a that penetrates in the left-right direction.

A second motor wire 51 is connected to the second electric motor 125. Details of the second motor wire 51 will be described later.

The center frame 13 comprises a third base 13A and a control unit 13B.

The third base 13A has a pair of front and rear bars 130 extending in the front-rear direction and spaced a predetermined distance apart in the left-right direction, and a pair of left and right bars 131 located at the rear and center of the front and rear bars 130 and connecting the front and rear bars 130.

A guide member 132 is provided on the inside of the rear of each front-rear bar 130. The guided portion 113A at the rear end of the first link 113 is engaged with the guide member 132 so that it can slide in the front-rear direction. A shaft holding portion 133 is provided on the inside of the front end of each front-rear bar 130. The shaft holding portion 133 has an opening facing downward. The shaft holding portion 133 engages with both ends of the connecting bar 115B, covering them from above.

Each front and rear bar 130 has a front protrusion 134A and a rear protrusion 134B that protrude outward on its outer surface. The front protrusion 134A is a protrusion for attaching the head frame 12 to the center frame 13. The rear protrusion 134B is a protrusion for attaching the foot frame 14 to the center frame 13.

Each front and rear bar 130 is formed with a front through-hole 135A and a rear through-hole 135B that penetrate in the left-right direction. The front through-hole 135A is a hole for fixing the head frame 12 to the center frame 13. The rear through-hole 135B is a hole for fixing the foot frame 14 to the center frame 13.

A leg lifting bar 137 extending rearward from the front left and right bars 131 is connected to the center of the bar. A back-leg link 136 extending forward is connected to the leg lifting bar 137.

The front end of the back/leg interlocking link 136 is configured to be connectable to the back-raising arm 122. When the front end of the back/leg interlocking link 136 engages and connects with the back-raising arm 122, the back/leg interlocking link 136 moves forward and backward in conjunction with the rotation of the back-raising arm 122, causing the back/leg interlocking link 136 and leg-raising bar 137 to rotate.

A roller 138 is rotatably fixed to the tip (rear end) of the leg lifting bar 137. This roller 138 abuts against the underside of the knee bottom 23 and leg bottom 24 near the connection point. Therefore, as the leg lifting bar 137 rotates, the roller 138 pushes up the knee bottom 23 and leg bottom 24 from below, raising and lowering the knee bottom 23 and leg bottom 24.

The rear side of the head frame 12 is connected to the center frame 13. The front and rear bars 120 and 130 are overlapped in side view, and the first engagement portions 127 are engaged with the front protrusions 134A. The knob bolts 40 are passed through the through holes 120a and screwed into the front through holes 135A.

The center frame 13 is connected to the base frame 11. The guide members 132 of the center frame 13 accommodate the guided portions 113A at the rear ends of the first links 113 so that they can slide in the front-to-rear direction, and the shaft holders 133 of each front-to-rear bar 130 engage to cover both ends of the connecting bar 115B from above, thereby connecting the center frame 13 to the base frame 11. When the center frame 13 moves up and down, the guided portions 113A slide within the guide members 132.

Figure 4 is an explanatory diagram of the control unit 13B, where (a) shows the cover 139B in an open state and (b) shows the cover 139B in a closed state.

The control unit 13B is attached to the front left and right bars 131. The control unit 13B has a control box 139 and a control board (not shown). The control box 139 has a generally rectangular parallelepiped shape and includes a main body 139A and a cover 139B. An opening 139c is formed in a portion of the main body 139A, and a control board (not shown) and multiple sockets (connectors) (not shown) are provided inside the main body 139A. The front end and left and right sides of the opening 139c of the main body 139A are provided with concave and convex portions 139D. Main connectors 52B and 53B (described below) are inserted into the sockets (not shown), and cords 52A and 53A (described below) are inserted into the recesses of the concave and convex portions 139D. Two engaging holes 139e are formed at the front end of the main body 139A, below the concave and convex portions 139D, penetrating the front end.

The cover 139B is configured to cover the opening 139c of the main body 139A and is rotatably attached to the main body 139A. Two engaging claws 139F are provided at the end of the cover 139B. The cover 139B is configured to close the opening 139c by rotating it to cover the opening 139c and engaging each engaging claw 139F with each engaging hole 139e. When the cover 139B closes the opening 139c, notches 139g are formed in the front end and left and right sides of the cover 139B, preventing the cover 139B from pinching the cords 52A and 53A. The cover 139B and the concave-convex portion 139D prevent the first relay wire 52 and the second relay wire 53 from coming loose from the control unit 13B. Therefore, the cover 139B and the concave-convex portion 139D function as a loosening prevention mechanism.

The first relay wire 52, second relay wire 53, and hand switch wire 54 (Figure 3) are connected to the control unit 13B. The configuration of these wires will be described later.

As shown in Figure 3, the foot frame 14 has a pair of front and rear bars 140 extending in the front-rear direction and spaced a predetermined distance apart in the left-right direction, and a left-right bar 141 located approximately in the center of the front and rear bars 140 and connecting the front and rear bars 140.

A second engagement portion 142 is provided at the front end of each front-rear bar 140. The second engagement portion 142 is formed in a concave shape that opens forward, and engages to accommodate the rear protrusion 134B on the outer surface of each front-rear bar 130. Each front-rear bar 140 has a through-hole 143 that penetrates in the left-right direction.

The front side of the foot frame 14 is connected to the center frame 13. The front and rear bars 130 and 140 overlap in side view, and the second engagement portions 142 engage with the rear protrusions 134B. The knob bolts 41 are inserted through the through holes 143 and threaded into the rear through holes 135B.

Next, the first motor wire 50, second motor wire 51, first relay wire 52, second relay wire 53, and hand switch wire 54 will be described with reference to Figures 3 to 5.

Figure 5 is a perspective view of each electric wire 50, 51, 52, 53. (a) shows the motor electric wires 50, 51 and relay electric wires 52, 53 in a state where they are not connected to each other, and (b) shows the motor electric wires 50, 51 and relay electric wires 52, 53 in a state where they are connected to each other.

As shown in FIG. 5, the first motor wire 50 includes a cord 50A, a main connector 50B, and a female relay connector 50C. The main connector 50B is connected to one end of the cord 50A, and the relay connector 50C is connected to the other end of the cord 50A. The main connector 50B is connected to the first electric motor 118A. The female relay connector 50C is connected to a male relay connector 52C (described below). The female relay connector 50C includes a main body 50D and a cover 50E. The main body 50D has a rectangular parallelepiped shape with an opening 50f. The cover 50E is rotatable relative to the main body 50D, and when rotated, it can be positioned so that a portion of it covers a portion of the opening 50f, as shown in FIG. 5(b), or is spaced apart from the opening 50f and does not cover it, as shown in FIG. 5(a).

The first relay wire 52 includes a cord 52A, a main connector 52B, and a male relay connector 52C. The main connector 52B is connected to one end of the cord 52A, and the relay connector 52C is connected to the other end of the cord 52A. The main connector 52B is connected to the control unit 13B (see Figure 4). The male relay connector 52C is inserted into and connected to the opening 50f of the female relay connector 50C. With the male relay connector 52C and the female relay connector 50C connected, the cover 50E is rotated so that the opening 50f and the end face of the male relay connector 52C facing the main connector 52B are covered by the end wall that constitutes the cover 50E. This prevents the male relay connector 52C from coming loose from the female relay connector 50C. The cover 50E functions as a loosening prevention mechanism.

The second motor electric wire 51 has the same configuration as the first motor electric wire 50. That is, the second motor electric wire 51 includes a cord 51A, a main connector 51B, and a female relay connector 51C. The main connector 51B is connected to the second electric motor 125. The female relay connector 51C is connected to the male relay connector 53C, which will be described later. The female relay connector 51C includes a main body 51D and a cover 51E. The main body 51D is shaped like a rectangular parallelepiped and has an opening 51f.

The second relay wire 53 has the same configuration as the first relay wire 52. That is, the second relay wire 53 includes a cord 53A, a main connector 53B, and a male relay connector 53C. The main connector 53B is connected to the control unit 13B (see Figure 4). The male relay connector 53C is inserted into and connected to the opening 51f of the female relay connector 51C. The cover 51E prevents the male relay connector 53C from coming loose from the female relay connector 51C. The cover 51E functions as a loosening prevention mechanism.

As shown in FIG. 3, the first motor wire 50 has a stretchable curled cord 50G as part of the cord 50A. The cord 50A is fixed at least at one point to the base frame 11. In this embodiment, the cord 50A is fixed at least at one point to the rear of the front-rear bar 110 of the base frame 11 by a cord clip (not shown).

The cord 51A of the second motor electric wire 51 is fixed at least at one point to the head frame 12. In this embodiment, the cord 51A is fixed at least at one point to the outer surface (top, bottom, or side) of the front-to-rear bar 120 of the head frame 12 by a cord clip (not shown). This positions the cord 51A so that it extends from the second electric motor 125 to the front-to-rear bar 120 and extends rearward along the front-to-rear bar 120.

The cord 52A of the first relay wire 52 is fixed at least at one point to the center frame 13. In this embodiment, the cord 52A is fixed at least at one point to the outer surface (top, bottom, or side) of the front and rear bar 130 of the center frame 13 by a cord clip (not shown). This positions the cord 52A so that it extends from the control unit 13B to the front and rear bar 130 and extends rearward along the front and rear bar 130.

The cord 53A of the second relay wire 53 is fixed at least at one point to the center frame 13. In this embodiment, the cord 53A is fixed at least at one point to the outer surface (top, bottom, or side) of the front and rear bar 130 of the center frame 13 by a cord clip (not shown). This positions the cord 53A so that it extends from the control unit 13B to the front and rear bar 130 and extends forward along the front and rear bar 130.

When the base frame 11, head frame 12, center frame 13, and foot frame 14 are assembled, the female relay connector 50C of the first motor electric wire 50 and the male relay connector 52C of the first relay electric wire 52 are positioned in close proximity to each other so that they can be connected to each other, and the female relay connector 51C of the second motor electric wire 51 and the male relay connector 53C of the second relay electric wire 53 are positioned in close proximity to each other so that they can be connected to each other.

The first motor wire 50, second motor wire 51, first relay wire 52, and second relay wire 53 are secured to each frame with cord clips so that, even when the movable mechanism (X-link mechanism 11B and arm mechanism 12B) is moved while they are connected to one another, they will not be pinched or pulled too hard, causing wire breakage.

The hand switch electric wire 54 comprises a cord 54A, a main connector (not shown), and two relay connectors (not shown). The main connector (not shown) is connected to one end of the cord 54A. The cord 54A has a single wire extending from the main connector (not shown) and two branch wires branching off from the single wire. The two relay connectors (not shown) are connected to the ends of the two branch wires. One of the branch wires is fixed at least in one location to the front-rear bar 130 of the center frame 13 on one widthwise side relative to the control unit 13B. The other branch wire is fixed at least in one location to the front-rear bar 130 of the center frame 13 on the other widthwise side relative to the control unit 13B. A hand switch 2 can be connected to each relay connector of the hand switch electric wire 54.

The base frame 11 and head frame 12 correspond to the first part. The center frame 13 corresponds to the second part. The first electric motor 118A corresponds to the first electric device. The second electric motor 125 corresponds to the first electric device. The control unit 13B corresponds to the second electric device. The first motor wire 50 and the second motor wire 51 correspond to the first electric wires. The first relay wire 52 and the second relay wire 53 correspond to the second electric wires. The female relay connector 50C and the female relay connector 51C correspond to the first connector. The male relay connector 52C and the male relay connector 53C correspond to the second connector. The frame unit 10 corresponds to the bed frame.

As described above, with the electric bed 1, the first motor wire 50 is fixed at least at one point to the rear of the front-rear bar 110 of the base frame 11, and the first relay wire 52 is fixed at least at one point to the outer surface of the front-rear bar 130 of the center frame 13. When the base frame 11 and the center frame 13 are assembled, the female relay connector 50C provided at the end of the first motor wire 50 and the male relay connector 52C provided at the end of the first relay wire 52 are positioned close enough to be connected to each other, and the first motor wire 50 and the first relay wire 52 are positioned so that they will not break even if the X-link mechanism 11B (movable mechanism) is moved with the female relay connector 50C and male relay connector 52C connected.

As a result, when assembling the electric bed 1, there is no need to refer to instructions or the like, secure the electric wires to the frame with cord clips, or route them along a predetermined path, to prevent them from getting pinched by the moving mechanism. In other words, the electric bed 1 prevents incorrect wiring and reduces the amount of wiring work, simplifying the assembly work of the electric bed 1 and significantly reducing the burden on the worker.

Furthermore, with regard to the second motor electric wire 51 and the second relay electric wire 53, when the head frame 12 and the center frame 13 are assembled, the female relay connector 51C provided at the end of the second motor electric wire 51 and the male relay connector 53C provided at the end of the second relay electric wire 53 are positioned in such close proximity that they can be connected to each other. Even if the arm mechanism 12B (movable mechanism) is moved with the female relay connector 51C and the male relay connector 53C connected, the second motor electric wire 51 and the second relay electric wire 53 will not be broken. Therefore, the second motor electric wire 51 and the second relay electric wire 53 also achieve the same effects as the first motor electric wire 50 and the first relay electric wire 52.

A portion of the first motor electric wire 50 is composed of a curled cord 50G. This prevents the first motor electric wire 50 from sagging and touching the floor. Even if the first motor electric wire 50 is pulled by the drive of the X-link mechanism 11B (movable mechanism), the curled cord 50G stretches, preventing the first motor electric wire 50 from breaking.

The cover portion 50E of the first motor electric wire 50 is configured to rotate to cover the end face of the male relay connector 52C when the male relay connector 52C and female relay connector 50C are connected. This prevents a user from accidentally getting caught on the electric wire and causing the male relay connector 52C to come loose from the female relay connector 50C. This prevents the first motor electric wire 50 from becoming disconnected from the first relay electric wire 52, causing the electric bed 1 to stop moving.

The cord 54A has a single wire extending from a main connector (not shown) and two branch wires branching off from the single wire. One of the branch wires is fixed at least in one location to the front-to-rear bar 130 of the center frame 13 on one widthwise side relative to the control unit 13B. The other branch wire is fixed at least in one location to the front-to-rear bar 130 of the center frame 13 on the other widthwise side relative to the control unit 13B.

This allows the hand switch 2 to be placed on the side desired by the user. Because the branch line is fixed to the center frame 13, there is no need to route the branch line after assembling the electric bed 1. This simplifies the assembly work of the electric bed 1 and reduces the burden on the worker.

Note that the present invention is not limited to the above-described examples. Those skilled in the art will be able to make various additions and modifications within the scope of the present invention.

Figure 6 is an explanatory diagram of the wiring paths of the electric wires 50, 51, 52, and 53 in the modified example. The hand switch electric wire 54 is not shown in Figure 6.

The wiring paths of the first motor electric wire 50, the second motor electric wire 51, the first relay electric wire 52, and the second relay electric wire 53 may be as shown in FIG. 6. That is, the cord 50A of the first motor electric wire 50 is fixed at least at one point to the first rod 118B by a cord clip (not shown) and is arranged along the first rod 118B. The cord 52A of the first relay electric wire 52 extends rearward from the control unit 13B and is fixed to the rear left and right bars 131.

The second relay electric wire 53 is arranged along a first stay 61 provided on the center frame 13. The first stay 61 is fixed to a support portion that supports the control portion 13B, and is composed of a portion extending forward, a portion extending diagonally upward from the end of the first stay 61, and a portion extending forward from the end. A cord 53A of the second relay electric wire 53 extends from the control portion 13B and extends along the first stay 61 to near its front end. The second motor electric wire 51 is arranged along a second stay 60 provided on the head frame 12. The second stay 60 is fixed to the rear left and right bars 121, and is composed of a portion extending forward, a portion extending diagonally downward from the end of the first stay 61, and a portion extending forward from the end to the vicinity of the second electric motor 125. The cord 51A of the second motor electric wire 51 extends from the second electric motor 125 and extends along the second stay 60 to near the rear end thereof.

As in the above embodiment, when the base frame 11, head frame 12, center frame 13, and foot frame 14 are assembled, the female relay connector 50C of the first motor electric wire 50 and the male relay connector 52C of the first relay electric wire 52 are positioned so that they can be connected to each other, and the female relay connector 51C of the second motor electric wire 51 and the male relay connector 53C of the second relay electric wire 53 are positioned so that they can be connected to each other. Even when the X-link mechanism 11B (movable mechanism) is moved with the female relay connector 50C and the male relay connector 52C connected, no disconnections occur in the first motor electric wire 50 and the first relay electric wire 52. And even when the arm mechanism 12B (movable mechanism) is moved with the female relay connector 51C and the male relay connector 53C connected, no disconnections occur in the second motor electric wire 51 and the second relay electric wire 53. Therefore, this modified example can achieve the same effects as the electric bed 1 of the above embodiment.

Furthermore, when the base frame 11, head frame 12, center frame 13, and foot frame 14 are assembled, the female relay connector 50C of the first motor electric wire 50 and the male relay connector 52C of the first relay electric wire 52 may be configured to be connected to each other simultaneously, and the female relay connector 51C of the second motor electric wire 51 and the male relay connector 53C of the second relay electric wire 53 may be configured to be connected to each other simultaneously.

Figure 7 is a perspective view of a modified first motor wire 50, where (a) shows the cover portion 50E in an open state and (b) shows the cover portion 50E in a closed state.

While the cover portion 50E of the first motor electric wire 50 functions as a disconnection prevention mechanism, the cover portion 50E may also function as a waterproof mechanism that prevents water from entering the main body portion 50D. In this case, as shown in FIG. 7(a), an oblong hole 50g is formed in the cover portion 50E, and a protrusion 50H provided on the main body portion 50D is inserted into the oblong hole 50g. The cover portion 50E is rotated to cover the opening 50f, and the cover portion 50E is slid toward the cord 50A, causing the sealing member 50J provided on the cover portion 50E to seal the opening 50f (FIG. 7(b)). This prevents water from entering the main body portion 50D when the electric bed 1 is disassembled and cleaned. Alternatively, a rectangular ring-shaped packing may be fitted to the opening 50f of the main body 50D, and when the male relay connector 52C is inserted into the main body 50D, the packing may be configured to fit tightly against the male relay connector 52C, preventing water from entering the main body 50D. This prevents water from entering the main body 50D even when the female relay connector 50C and male relay connector 52C are connected.

The main connector 50B of the first motor electric wire 50 may be configured to have both a disconnection prevention mechanism and a waterproof mechanism. The main connector 51B of the second motor electric wire 51 may be configured to have a disconnection prevention mechanism and/or a waterproof mechanism. The main connector 52B of the first relay electric wire 52 and the main connector 53B of the second relay electric wire 53 may be configured to have a waterproof mechanism.

The first motor electric wire 50 has a stretchable curled cord 50G as part of the cord 50A. However, for example, as shown in FIG. 8, the cord 53A of the second relay electric wire 53 may have a curled cord 53D. Similarly, the second motor electric wire 51 and the first relay electric wire 52 may have curled cords.

As shown in FIG. 9 , the cord 53A of the second relay electric wire 53 may have a winding section 53E that automatically winds and stores the cord 53A instead of the curled cord 53D. This prevents the second relay electric wire 53 from sagging and prevents the user from getting caught on the cord 53A. Furthermore, even if the second relay electric wire 53 is pulled by driving the arm mechanism 12B (movable mechanism), the cord 53A inside the winding section 53E is pulled out, preventing the second relay electric wire 53 from being damaged or broken. Similarly, the first motor electric wire 50, the second motor electric wire 51, and the first relay electric wire 52 may each have a winding section.

As shown in Fig. 10, the second motor electric wire 51 and the second relay electric wire 53 may be configured as a single electric wire 151. The electric wire 151 includes a cord and two main connectors connected to both ends of the cord. One of the main connectors is connected to the control unit 13B of the center frame 13 before assembly. At least one point of the cord of the electric wire 151 may be fixed to the front and rear bars 130 of the center frame 13. The remaining portions of the electric wire 151 are bundled. Then, when the head frame 12 and the center frame 13 are assembled, the other main connector is connected to the second electric motor 125.

This configuration prevents the worker from inserting the main connector of the electrical wire 151 into the wrong socket on the control unit 13B. This simplifies the assembly work of the electric bed 1 and reduces the burden on the worker.

In this modified example, the cord of the electric wire 151 is fixed at least at one point to the front and rear bar 130 of the main frame 13, but it does not have to be fixed to the front and rear bar 130. A portion of the electric wire 151 may be configured as a curled cord, or the electric wire 151 may be provided with a winding section that automatically winds and stores the cord.

The cord 50A of the first motor electric wire 50 may be passed through the inside of the base frame 11, the cord 50A of the second motor electric wire 51 may be passed through the inside of the head frame 12, the cord 50A of the first relay electric wire 52 may be passed through the inside of the center frame 13, and the cord 50A of the second relay electric wire 53 may be passed through the inside of the center frame 13.

In the above description, the first and second motor wires 50, 51 have female relay connectors 50C, 51C, and the first and second relay wires 52, 53 have male relay connectors 52C, 53C. However, the first and second motor wires 50, 51 may have male relay connectors 52C, 53C, and the first and second relay wires 52, 53 may have female relay connectors 50C, 51C. While the cover 50E is provided on the first motor wire 50 as a waterproofing mechanism, a cover with a waterproofing mechanism may also be provided on the first relay wire 52. Furthermore, caps may be inserted into the multiple sockets (connectors) on the main body 139A of the control unit 13B when the electric bed 1 is disassembled for cleaning. The caps may be detachably attached to the cover 139B, or may be provided as separate components. This prevents water from entering the sockets during cleaning.

1: Electric bed, 2: Hand switch, 10 Frame section (bed frame), 11: Base frame (first part), 11B: X-link mechanism, 12: Head frame (first part), 12B: Arm mechanism, 13: Center frame (second part), 13B: Control section (second electrical device), 50: First motor wire (first wire), 51: Second motor wire (first wire), 50C, 51C: Female relay connector (first Connector), 50E, 51E: Cover, 52: First relay wire (second wire), 53: Second relay wire (second wire), 52C, 53C: Male relay connector (second connector), 50G, 53D: Curled cord, 53E: Winding part, 54: Hand switch wire, 118A: First electric motor (first electrical device), 125: Second electric motor (first electrical device), 139B: Cover, 139D: Concave/convex part, 151: Wire

Claims (14)

An electric bed having at least one first part and a second part, which can be in an assembled state in which they are connected to each other, and in a disassembled state in which they are separated from each other,
the first component includes a first electric device and a movable mechanism driven by the first electric device;
the second component has a second electrical device electrically connectable to the first electrical device for driving the movable mechanism;
In the decomposed state, the following (1), (2), (3), (4), (5), and (6):
(1) One end of a first electric wire is connected to the first electric device, and the other end of the first electric wire has a first connector;
(2) One end of a second electric wire is connected to the second electric device, and the other end of the second electric wire has a second connector;
(3) The first electric wire is arranged on the first component in a first arrangement and is fixed to the first component at at least one location;
(4) The second electric wire is arranged on the second component in a second arrangement and is fixed to the second component at at least one point;
(5) the first connector and the second connector are separated from each other;
(6) The first arrangement and the second arrangement are selected so that the first connector and the second connector are positioned in a proximity to each other so as to be connectable to each other in the assembled state, and so that even if the movable mechanism is moved in a state in which the first connector and the second connector are connected, breakage of the first electric wire and the second electric wire does not occur,
the first component is a base frame having a lifting mechanism as the movable mechanism and an actuator for the lifting mechanism as the first electric device , and/or a first frame provided on an upper portion of the base frame and having a raising/lowering mechanism for raising the back as the movable mechanism and an actuator for the raising/lowering mechanism as the first electric device ,
the second component is a second frame provided on an upper portion of the base frame and having a control unit for the lifting mechanism and the raising/lowering mechanism as the second electric device ;
Electric bed. The electric bed of claim 1, wherein the first connector and the second connector are configured to be connected to each other simultaneously when the first and second components are assembled. An electric bed according to claim 1 or claim 2, wherein a portion of the first electric wire and/or the second electric wire is formed from a curled cord. An electric bed according to claim 1 or claim 2, wherein the first electric wire and/or the second electric wire is provided with a winding section that automatically winds and stores the electric wire. An electric bed according to any one of claims 1 to 4, wherein the first connector and/or the second connector has a disconnection prevention mechanism that prevents disconnection after connection. An electric bed according to any one of claims 1 to 5, wherein the first connector and the second connector have a waterproof mechanism that prevents water from entering the interior. An electric bed having at least one first part and a second part, which can be in an assembled state in which they are connected to each other, and in a disassembled state in which they are separated from each other,
the first component includes a first electric device and a movable mechanism driven by the first electric device;
the second component has a second electric device electrically connectable to the first electric device and configured to control the actuation of the movable mechanism;
In the decomposed state, the following (1) and (2):
(1) One end of an electric wire is connected to the second electric device, the electric wire is arranged in a predetermined position on the second part, and at least one point of the electric wire is fixed to the second part;
(2) The predetermined arrangement is selected so that the other end of the electric wire can be connected to the first electric device in the assembled state;
the first component is a base frame having a lifting mechanism as the movable mechanism and an actuator for the lifting mechanism as the first electric device , and/or a first frame provided on an upper portion of the base frame and having a raising/lowering mechanism for raising the back as the movable mechanism and an actuator for the raising/lowering mechanism as the first electric device ,
the second component is a second frame provided on an upper portion of the base frame and having a control unit for the lifting mechanism and the raising/lowering mechanism as the second electric device ;
Electric bed. The electric bed according to claim 7, wherein the second electrical device has a mechanism for preventing the electrical wires from coming loose. 9. The electric bed according to claim 7 , wherein a part of the electric wire is formed of a curled cord. 9. The electric bed according to claim 7 , wherein the electric wire is provided with a winding section that automatically winds and stores the electric wire. The first component includes a pair of front-rear bars extending in the front-rear direction of the electric bed and arranged at a predetermined interval in the left-right direction, and a left-right bar connecting the pair of front-rear bars,
The electric bed according to claim 1 , wherein the first electric wire is arranged along one of the pair of front and rear bars. The second component includes a pair of front-rear bars extending in the front-rear direction of the electric bed and arranged at a predetermined interval in the left-right direction, and a left-right bar connecting the pair of front-rear bars,
The electric bed according to claim 1 , wherein the second electric wire is arranged along one of the pair of front and rear bars. The first component includes a pair of front-rear bars extending in the front-rear direction of the electric bed and arranged at a predetermined interval in the left-right direction, a left-right bar connecting the pair of front-rear bars, and a stay extending in the front-rear direction and fixed to the left-right bars,
The electric bed according to claim 1 , wherein the first electric wire is arranged along the stay. The second component includes a pair of front-rear bars extending in the front-rear direction of the electric bed and arranged at a predetermined interval in the left-right direction, a left-right bar connecting the pair of front-rear bars, and a stay extending in the front-rear direction and fixed to the left-right bars,
The electric bed according to claim 1 , wherein the second electric wire is arranged along the stay.