CN112057262B - Electric bed - Google Patents

Abstract

An electric bed (A) of the present invention is provided with: a bed (200); a drive mechanism (300) that raises and lowers the bed; a control unit (400) that controls the drive mechanism; and a notification unit that notifies notification information based on an instruction from the control unit. The control part enables the informing part to inform the informing information of different modes according to the height of the bed from the floor.

Description

Electric bed

This application is a divisional application of the following patent applications:

application No.: 201680057712.4

Application date: 2016 (10 months and 5 days)

The invention name is as follows: bed device

Technical Field

The present invention relates to a bed apparatus.

This application claims priority based on Japanese application No. 2015-198765, filed in Japan at 10/6/2015, the contents of which are incorporated herein by reference.

Background

For example, patent document 1 discloses an electric bed including a lifting device for lifting a bed frame and a switch for operating the lifting device. Further, patent document 2 discloses an electric bed in which a bed frame can be raised and lowered in stages. Further, patent document 3 discloses an electric bed in which the lifting speed of the bed frame is variable. These bed devices can adjust the height of the bed by operating a switch to raise and lower the bed frame.

Documents of the prior art

Patent literature

Patent document 1: japanese laid-open patent publication No. 2004-159807

Patent document 2: japanese unexamined patent application publication No. 2014-076214

Patent document 3: japanese patent No. 5690033

Problems to be solved by the invention

In these electric beds, a user of the electric bed or a caregiver of the user (hereinafter, referred to as an operator) operates the raising and lowering of the electric bed while visually checking the height of the bed supported by the bed frame from the floor. In this case, the operator often views the bed from above, and sometimes it is difficult to visually confirm the height of the bed. In particular, it is difficult to visually confirm the height of the bed in a dark room or the like. In addition, when the height of the bed cannot be recognized, there is a possibility that an article (e.g., a nursing article) placed around the electric bed may be sandwiched between the bed and the floor.

Disclosure of Invention

The present invention has been made in view of the above circumstances, and an object thereof is to provide a bed device including: it is easy to recognize the change of the bed height.

Means for solving the problems

In order to achieve the above object, the present invention adopts the following aspects.

(1) A bed device according to a first aspect of the present invention includes: a bed; a drive mechanism that raises and lowers the bed; a control unit that controls the drive mechanism; and a notification unit that notifies notification information based on a command from the control unit, wherein the control unit causes the notification unit to notify notification information of different modes according to a height of the bed from a floor.

According to the aspect described in the above (1), the notification unit notifies the notification information of the different modes according to the height of the bed from the floor. Thus, the operator can recognize the notification information and can grasp the bed height without visually confirming the bed height. Therefore, the operator can easily recognize the change in the height of the bed.

(2) In the aspect described in (1) above, the following configuration may be adopted: when the bed is lowered, the control unit temporarily stops the lowering of the bed by the drive mechanism when the height of the bed from the floor becomes a preset temporary stop height.

In the case of the above (2), when the height of the bed from the floor becomes the temporary stop height, the driving mechanism stops the lowering operation. Thereby, the lowering of the bed is temporarily stopped at the temporary stop height. Therefore, the operator who recognizes that the lowering of the bed has stopped can confirm whether or not there is an obstacle or the like between the bed and the floor.

(3) In the aspect described in (2) above, the following configuration may be adopted: the control unit causes the notification unit to notify the notification information only when the height of the bed from the floor is equal to or less than the temporary stop height.

In the case of the above (3), the notification unit notifies the notification information only when the height of the bed floor is equal to or less than the temporary stop height. Thus, the operator can recognize that the height of the bed from the floor is equal to or less than the temporary stop height without visually confirming the height of the bed by recognizing the notification information.

(4) The bed device according to any one of the above (1) to (3), wherein: the notification unit includes a speaker, and the control unit causes the speaker to emit notification information sounds of different patterns as the notification information according to the height of the bed from the floor.

In the case of the above (4), the speaker emits notification information sounds of different patterns depending on the height of the bed from the floor. Thus, the operator can recognize the change in the height of the bed from the floor without visually confirming the height of the bed by recognizing the notification information sound.

(5) In the case of the above (4), the following configuration may be adopted: the notification information sound has a pattern in which a sound emission period, which is a period in which sound is emitted or continuously emitted, and a sound deadening period, which is a period in which sound is not emitted, are alternately repeated, and at least one of the sound emission period and the sound deadening period is set to be shorter as the height of the bed from the floor is lower.

In the case of (5) above, the lower the height of the bed from the floor, the shorter at least one of the sound emission period and the sound deadening period is set. Thus, the operator can intuitively recognize the mode of the notification information sound, and can recognize the change in the height of the bed from the floor without visually confirming the height of the bed.

(6) In the case of the above (4), the notification information sound may be set to: at least one of the sound pressure and the frequency differs depending on the height of the bed from the floor.

In the case of (6) above, the operator can visually recognize the pattern of the notification information sound, and can recognize the change in the height of the bed from the floor without visually recognizing the height of the bed.

(7) In the case of any one of the above (4) to (6), the following configuration may be adopted: when the lowering of the bed is stopped, the control unit causes the speaker to emit a stop sound, which is a sound for notifying that the lowering of the bed is stopped.

In the case of (7) above, when the lowering of the bed stops, a stop sound is emitted from the speaker. Thus, the operator can recognize that the lowering of the bed has stopped without visually checking.

(8) In the case of any one of the above (4) to (7), the following configuration may be adopted: the bed control apparatus further includes a detection unit that detects a change in an environment around the bed, and the control unit changes at least one of a sound pressure of the notification information sound and a frequency of the notification information sound based on an input from the detection unit.

In the case of the above (8), the speaker emits the notification information sound of the sound pressure or frequency corresponding to the change in the environment around the bed device. This can suppress the adverse effect of the notification information sound on the surrounding environment.

(9) In the case of any one of the above (1) to (8), the following configuration may be adopted: the bed is further provided with an operation part for inputting lifting instructions to the operation part, the informing part is provided with a vibration generating part for vibrating the operation part, and the control part enables the vibration generating part to generate different modes of vibration according to the height of the bed from the floor.

In the case of (9) above, the vibration generating unit generates vibrations of different modes depending on the height of the bed from the floor. Thus, even if the operator who operates the operation unit does not visually recognize the height of the bed, the operator can recognize the vibration pattern to recognize the change in the height of the bed from the floor.

(10) In the case of any one of the above (1) to (9), the following configuration may be adopted: the notification unit includes a display unit that displays the notification information and displays warning displays of different modes as notification information according to the height of the bed from the floor.

In the case of (10) above, the display unit displays warnings of different modes according to the height of the bed from the floor. Thus, the operator can recognize the change in the height of the bed from the floor by the display of the recognition display unit.

Effects of the invention

According to the above aspects of the present invention, the control unit causes the notification unit to notify the notification information of the different modes according to the height of the bed from the floor. Therefore, the operator can confirm the height of the bed from the floor without directly seeing the identification notification information, and thus, the operator can easily recognize the change in the height of the bed.

Drawings

Fig. 1 is a side view of a bed device according to a first embodiment of the present invention.

Fig. 2 is a functional block diagram of a driving mechanism, a control mechanism, and an operation unit of the bed device.

Fig. 3 is a front view of the operation section of the bed device.

Fig. 4 is a flowchart showing an overview of a lowering operation of the bed apparatus.

Fig. 5 is a flowchart showing the details of the operation of the bed device when the bed is lowered.

Fig. 6 is an example of a pattern of a buzzer sound emitted from the speaker of the bed device.

Fig. 7 is a functional block diagram of a modification of the drive mechanism, the control mechanism, and the operation unit of the bed device.

Fig. 8 is a plan view of a bed device according to a second embodiment of the present invention.

Fig. 9 is a side view of the bed apparatus.

Fig. 10 is an exploded perspective view of a support stand constituting the bed device.

Fig. 11 is a plan view of the support frame.

Fig. 12 is a side view of the support stand.

Fig. 13 is a side view of the support frame, and is a view showing a state in which the main frame is raised by the raising and lowering mechanism.

Fig. 14 is a front view of an operation unit applied to the bed device according to the embodiment.

Description of the symbols

A bed device

B bed device

FL floor

h height

During U pronunciation

t3 period of sound deadening

11 bed

12 support stand

13 drive mechanism

16 back soleplate (Movable soleplate)

18 leg baseboard (Movable baseboard)

23. 24 rotating shaft

26 Main frame

33 second longitudinal member (longitudinal member)

34 second horizontal component (bearing component)

34a side surface

34b lower surface

43b first connecting part (receiving member)

49 second connecting part (receiving member)

53 connecting rod (bearing component)

57 movable part

120 lifting mechanism

200 bed

300 driving mechanism

400 control mechanism

440 first control unit

441 storage unit

442 Environment detecting part (detecting part)

500 operating part

550 second control part

551 input part

551a falling switch

551b rising switch

552 loudspeaker

553 display unit

554 vibration generating part

Detailed Description

[ first embodiment ]

A first embodiment of a bed device according to the present invention will be described below with reference to fig. 1 to 5. Fig. 1 is a side view of a bed device a according to the present embodiment. The direction H in fig. 1 is a direction in which the head of a user (not shown) on the bed device a is located, and the direction F is a direction in which the feet of the user on the bed device a are located. In the following description, the H direction (head side) is defined as the front direction, the F direction (foot side) is defined as the rear direction, the right side when the user leans upward on the bed 200 described below is defined as the right side, and the left side when the user leans upward on the bed 200 described below is defined as the left side. The bed device a includes a support stand 100, a bed 200, a drive mechanism 300, a control mechanism 400, and an operation unit 500.

The support frame 100 includes a base frame 110, a main frame 111, an elevating mechanism 120, and a plate 130. The base frame 110 is a rectangular member provided on a floor (floor surface, installation surface) FL. The base frame 110 includes leg members 100a at respective ends that contact the floor FL. These leg members 100a are rubber cover members provided to prevent breakage of the floor FL due to concentration of load on the floor FL.

The main frame 111 is a rectangular frame member in a plan view, and directly supports the bed 200. The main frame 111 includes an optional attachment portion 110 a. A pair of optional mounting portions 110a are provided on the left and right sides so as to sandwich the main frame 111, and further, a pair of optional mounting portions 110a are provided at an interval in the front-rear direction. These optional attachment portions 110a are members for fixing a falling prevention fence, not shown.

The lifting mechanism 120 includes: a first link 120a, a second link 120b, and a coupling pin 120 c. The first link 120a is a rod-shaped member connecting between the base frame 110 and the main frame 111. The first link 120a is fixed to the base frame 110, and is slidably fixed to the main frame 111 in the front-rear direction. The second link 120b is a rod-shaped member for connecting the base frame 110 and the main frame 111, and is provided to intersect with the first link 120a, similarly to the first link 120 a. The second link 120b is fixed to the main frame 111 and slidably fixed to the base frame 110 in the front-rear direction.

The coupling pin 120c is coupled to the first link 120a and the second link 120b such that both members can rotate about the crossing position of the first link 120a and the second link 120b, respectively. A pair of such elevating mechanisms 120 is provided on the left and right in the front direction. These lifting mechanisms 120 support the main frame 111 such that the main frame 111 can be lifted and lowered by the first link 120a and the second link 120 b.

The plate 130 is fixed to the main frame 111 and rises upward with respect to the bed surface 200. A pair of plates 130 is provided in the front and rear of the main frame 111, and the plates 130 are erected from both ends of the second vertical member 33 in the front-rear direction.

The support frame 100 having such a structure supports the bed 200 by connecting the main frame 111 and the base frame 110 by the elevating mechanism 120, the main frame 111 directly supports the bed 200, and the base frame 110 is directly provided on the floor FL. The support frame 100 can move up and down the bed 200 supported by the main frame 111 by the lifting mechanism 12. The bed 200 is a flat plate-like member, and is disposed on the support frame 100 as shown in fig. 1. A mattress not shown is provided on the bed 200.

Fig. 2 is a functional block diagram of the drive mechanism 300, the control mechanism 400, and the operation unit 500. The driving mechanism 300 is coupled to the first link 120a by a coupling portion not shown to transmit the motion, and is disposed inside the main frame 111. As shown in fig. 2, the driving mechanism 300 includes a motor 330 and a position information detecting unit 331. The motor 330 has a rotating shaft, not shown, that rotates, and generates power for raising and lowering the bed 200. The position information detecting unit 331 detects the rotation amount of the motor 330 as information on the height h of the bed 200 from the floor FL (installation surface of the base frame 110), and inputs the information to the first control unit 440, which will be described later. The drive mechanism 300 is connected to a power supply, not shown, and the bed 200 is raised and lowered by rotating the first link 120a clockwise or counterclockwise in accordance with an instruction from the first controller 440.

The control mechanism 400 is fixed to the support frame 100 and is connected to a power supply, not shown. The control means 400 includes a first control unit 440, a storage unit 441, and an environment detection unit 442. The first control unit 440 controls the motor 330 based on the data acquired from the position information detection unit 331. The first control unit 440 determines the brightness of the room based on the signal input from the environment detection unit 442, and sends an instruction of the volume (sound pressure) of the speaker 552 to the second control unit 550. That is, the first control unit 440 changes the sound pressure of the buzzer sound (notification information sound) based on the input from the environment detection unit 442.

The storage unit 441 is a memory that transmits and receives data to and from the first control unit 440 in response to a request from the first control unit 440. The storage unit 441 also stores, in advance, a maximum floor height, which is the height h of the bed 200 from the floor FL, a temporary stop height, a minimum floor height, which is the height of the lower limit of the bed 200 that can be lowered, a pattern of a buzzer sound, and a program executed by the first control unit 440. The temporary stop height is a height from the floor FL when the lowering of the bed 200 is temporarily stopped, and is predetermined at the time of manufacturing the bed device a. In the present embodiment, the temporary stop height is set to 29cm (290mm), for example. The environment detection unit 442 (detection unit) is an illuminance sensor that detects the brightness in the room in which the bed apparatus a is installed. The environment detection unit 442 outputs a signal of the detected illuminance to the first control unit 440.

Fig. 3 is a front view of the operation unit 500. The operation unit 500 is connected to the control mechanism 400 by a cable not shown. As shown in fig. 2, the operation unit 500 includes a second control unit 550, an input unit 551, a speaker 552, and a display unit 553. The second control unit 550 controls the speaker 552 and the display unit 553 based on the instruction of the first control unit 440 and the signal input from the input unit 551. The first control unit 440 and the second control unit 550 cooperate with each other to function as a control unit in the present invention.

As shown in fig. 3, the input unit 551 includes a down switch 551a, an up switch 551b, and a volume adjustment button, not shown. The lowering switch 551a is a switch operated by the operator to lower the bed 200. The raising switch 551b is a switch operated by the operator to raise the bed 200. Further, the down switch 551a and the up switch 551b are turned on only while the operator keeps pressing. The volume adjustment button is a button for the operator to adjust the volume of the speaker 552. Further, the operator may be configured not to sound a buzzer sound by operating the volume adjustment button.

The speaker 552 emits a buzzer sound based on an instruction of the second control unit 550. The speaker 552 corresponds to the notification unit in the present invention. The display unit 553 is a display that displays information such as the height h of the bed 200 based on the instruction of the second control unit 550.

This bed apparatus a is an electric bed in which the height h of the bed 200 from the floor FL can be adjusted by a user or a caregiver of the user. The raising and lowering operation of the bed 200 by the operator is inputted through the operation unit 500 placed at the hand of the operator. The bed device a performs the raising and lowering operation of the bed 200 based on the input. Fig. 4 is a flowchart showing an overview of the lowering operation of the bed 200. As shown in fig. 4, when the lowering switch 551a is pressed, the lowering of the bed 200 is started (step S1). When the height h of the bed 200 from the floor FL reaches the temporary stop height, the speaker 552 sounds a buzzer (temporary stop sound) to stop the lowering operation of the bed 200 (step S2). Further, when the down switch 551a is pressed again, the bed 200 is lowered again in a state where a buzzer sound (down sound) is emitted (step S3). When the height h of the bed 200 from the floor FL becomes the minimum floor height, the speaker 552 sounds a buzzer (final stop sound) to stop the lowering of the bed 200 (step S4).

Next, the operation of the bed 200 in the bed apparatus a when it is lowered will be described in detail with reference to fig. 5 and 6. Fig. 5 is a flowchart showing the details of the operation when the bed 200 is lowered.

First, it is determined whether or not the down switch 551a is on (step S11). Here, the second control unit 550 determines whether or not the down switch 551a is on. When it is determined that the lowering switch 551a is not turned on, the lowering of the bed 200 is stopped (step S12). When it is determined that the lowering switch is on, it is determined whether the bed height h is higher than the temporary stop height (step S13). Here, the first control unit 440 compares the height h of the bed 200 from the floor FL acquired from the position information detecting unit 331 with the temporary stop height (29cm) stored in the storage unit 441.

When determining that the height h of the bed 200 from the floor FL is higher than the temporary stop height, that is, when determining yes in step S13, the first controller 440 rotates the motor 330 to lower the bed 200 (step S14). Then, it is judged whether or not the height h of the bed 200 from the floor FL is the temporary stop height (step S15). Here, the first control unit 440 compares the height h of the bed 200 from the floor FL acquired from the position information detecting unit 331 with the temporary stop height stored in the storage unit 441. If the height h of the bed 200 from the floor FL is higher than the temporary stop height, that is, if no in step S15, the process returns to step S11 again.

If the height h of the bed 200 from the floor FL is equal to the temporary stop height, that is, if yes is determined in step S15, the first controller 440 stops the operation of the motor 330 to bring the lowering of the bed 200 into the temporary stop state (step S16). Further, the first control unit 440 causes the speaker 552 to emit a buzzer sound (alarm sound) indicating that the bed 200 has reached the temporary stop height (step S17). The order of the operations in step S16 and step S17 may be different, and step S17 may be performed first, and then step S16 may be performed.

Subsequently, it is determined whether or not the down switch is turned on even after the buzzer sound is sounded (step S18). Here, the first control unit 440 determines whether the down switch 551a is turned on. When the lowering switch 551a is turned on, that is, when it is determined yes in step S18, the first controller 440 stops the lowering of the bed 200 (step S19), and the process returns to step S18 again. When the bed 200 descends from a position higher than the temporary stop height, the bed 200 continues to stop at the temporary stop height even if the user continues to press the descending switch 551 a. That is, even if the operator keeps pressing the lowering switch 551a, the bed 200 does not lower in step S19.

On the other hand, when the down switch 551a is not turned on, that is, when the determination in step S18 is no, the process returns to step S11 again. In this way, the operator needs to release the bed 200 temporarily and then hold the down switch 551a again in order to lower the height h below the temporary stop height. When the operator presses down the down switch 551a again to input a signal to the second controller 550, the determination at step S11 is yes, and the process proceeds to step S13.

In step S13, when the height h of the bed 200 from the floor FL is equal to or less than the temporary stop height, that is, when it is determined as no, a buzzer sound is generated in a buzzer sound pattern corresponding to the height h of the bed 200 from the floor FL in accordance with the unit interval period t3 of table 1 (step S20). At this time, the first control unit 440 changes the sound pressure of the buzzer sound based on the input from the environment detection unit 442.

Fig. 6 shows an example of a pattern of a buzzer sound (alarm sound pattern) emitted from the speaker 552. In fig. 6, t1 indicates a sound emission period (100ms) during which the sound (buzzer) from the speaker 552 continues to be emitted, and t2 indicates a sound deadening period (50ms) during which the sound from the speaker 552 does not emit. That is, the diagram shown in fig. 6 indicates the forward direction at the time indicated by the right side of the drawing sheet, and indicates the presence or absence of a buzzer sound in the up-down direction of the drawing sheet, and at a predetermined time, the sound from the speaker 552 sounds when the solid line is positioned on the upper side of the drawing sheet, and the sound from the speaker 552 does not sound when the solid line is positioned on the lower side of the drawing sheet. t3 denotes a cell interval period (variable).

The buzzer sounds one unit, i.e., a sound emission period t1+ a sound deadening period t2+ a sound emission period t1, and the unit U is sounded a plurality of times during a unit interval period t3 (see fig. 6), thereby calling the attention of the operator. Further, the cell interval time t3 of this buzzer sound is set as shown in table 1 below: the lower the height h of the bed 200 from the floor FL, the shorter the unit interval period t 3. As described above, in the present embodiment, the unit interval period t3, which is a period in which no sound is generated, is set to be shorter as the height h of the bed 200 from the floor FL is lower, and functions as a sound deadening period according to the present invention. Therefore, when the bed 200 is lowered, the unit interval time t3 that functions as the sound deadening period is gradually shortened while the period (2 × t1+ t2) of one unit U that functions as the sound emission period is kept constant.

As described above, the pattern of the buzzer sound changes according to the height h of the bed 200 from the floor FL. The output value of the height h of the bed 200 from the floor FL detected by the position information detecting unit 331 is in units of centimeters (cm) rounded off at or below a decimal point.

[ Table 1]

Height h	Unit interval period t3[ ms]
		Temporary stopping height of 28cm	470
27～26cm	440
		25～24cm	410
23～22cm	380
		21～20cm	350
19～18cm	320
		17～16cm	290
15cm	260

Returning to fig. 5, following step S20, the first controller 440 controls the motor 330 to start lowering the bed 200 (step S21). Then, the first control unit 440 determines whether or not the height h of the bed 200 from the floor FL is the lowest floor height which is the lower limit of the height that can be lowered (step S22). If the floor height is higher than the minimum floor height, that is, if the determination in step S22 is no, the process returns to step S11. If the floor height is the lowest, that is, if yes is determined in step S22, the first controller 440 stops lowering the bed 200 (step S23). At this time, a stop buzzer sound (stop sound) may be sounded as a long sound while stopping the lowering of the bed 200.

The bed device a of the present embodiment includes, as the control unit, the first control unit 440 and the second control unit 550 that cause the speaker 552 to emit different patterns of beeps according to the height h of the bed 200 from the floor FL. Thus, the operator can check the change in the height h of the bed 200 from the floor FL without visually checking the height h of the bed 200.

The bed device a of the present embodiment includes a storage unit 441 that stores the temporary stop height. Thus, when the height h of the bed 200 from the floor FL reaches the temporary stop height, the first control unit 440 temporarily stops the lowering of the bed 200 even if the operator keeps pressing the lowering switch 551 a. Therefore, the operator who recognizes that the lowering of the bed 200 has stopped can confirm whether or not there is an obstacle or the like between the bed 200 and the floor FL.

The bed device a of the present embodiment includes an environment detection unit 442. Thus, the first control unit 440 can set the sound pressure of the buzzer sound emitted from the speaker 552 according to the brightness of the room in which the bed apparatus a is installed. Therefore, a buzzer sound having a magnitude suitable for the surrounding environment such as at bedtime or the condition of the user of the bed device a can be generated. Namely, the interference of the buzzer sound with the surrounding environment can be suppressed.

[ second embodiment ]

With reference to fig. 8 to 14, a modified example of the support base, the bed, and the drive mechanism of the bed device according to the present invention will be described as a second embodiment. In the bed device B according to the present embodiment, the same reference numerals are used for the portions common to the first embodiment, and redundant description is omitted.

As shown in fig. 8 to 14, the bed device B includes a bed 11, a support frame 12, a drive mechanism 14, a plate 14, a control unit 15, and an operation unit 501. The bed device B is a so-called electric bed using electric power as a power source.

The bed 11 is longer in the front-rear direction than in the left-right direction in a plan view. The bed 11 includes a back floor 16, a waist floor 17, and a leg floor 18, and the back floor 16, the waist floor 17, and the leg floor 18 are arranged in this order from the head side H toward the foot side F. The leg bottom plate 18 includes a knee bottom plate 19 and a foot bottom plate 20, and these knee bottom plate 19 and foot bottom plate 20 are arranged in this order from the head side H toward the foot side F.

The upper surface of the back bottom 16, the upper surface of the waist bottom 17, and the upper surfaces of the leg bottoms 18 (the knee bottom 19 and the foot bottom 20) form part of a bed surface 21. Back bottom plate 16 corresponds to a portion of bed surface 21 that supports the back of the user, waist bottom plate 17 corresponds to a portion of bed surface 21 that supports the waist of the user, and leg bottom plates 18 correspond to portions of bed surface 21 that support the legs of the user. The knee bottom plate 19 corresponds to a part of the bed surface 21 from the knee to the waist for supporting the user, and the foot bottom plate 20 corresponds to a part of the bed surface 21 from the knee to the toe for supporting the user. The lumbar base 17 is formed to be extendable and retractable in the front-rear direction. The knee bottom plate 19 and the foot bottom plate 20 are connected to each other so as to be rotatable around a bending shaft 22 extending in the left-right direction.

In a standard state before the bed 11 is deformed (for example, rotated with rolling) by lifting the back or the knees by the drive mechanism 13, the bed surface 21 has an orthogonal surface orthogonal to the up-down direction. The bed surface 21 is formed in a rectangular shape longer in the front-rear direction than in the left-right direction in plan view. The longitudinal direction of the bed surface 21 (bed 11) is defined as the front-rear direction, and the width direction of the bed surface 21 is defined as the left-right direction. A mattress not shown is disposed on bed surface 21.

The support frame 12 supports the bed 11 and receives loads of the bed 11 and a user on the bed 11. In the present embodiment, the support frame 12 supports the back floor 16 and the leg floor 18 (movable floor) so as to be rotatable about the rotation shafts 23 and 24 extending in the left-right direction, and the bed apparatus B is a so-called movable backrest bed. The support frame 12 includes a base frame 25, a main frame 26, and an elevating mechanism 27.

The base frame 25 is provided on the floor FL, and has a rectangular shape in plan view. As shown in fig. 10, the base frame 25 includes a first vertical member 28 extending in the front-rear direction and a first horizontal member 29 extending in the left-right direction.

A pair of first vertical members 28 are provided at intervals in the left-right direction.

A first horizontal member 29 is provided between a pair of left and right first vertical members 28, and the two first vertical members 28 are connected in the left-right direction. A pair of first cross members 29 are provided at intervals in the front-rear direction. The first transverse member 29 is fixed so as not to be movable relative to the first longitudinal member 28.

The first vertical members 28 have front-rear direction end portions projecting outward in the front-rear direction from the first horizontal members 29, and leg members 30 for installation are attached to these end portions. Further, although a rubber cover is used as the leg member 30 in the illustrated example, a caster may be used instead of the rubber cover.

The main frame 26 directly supports the bed 11. The main frame 26 includes a frame portion 31 and an optional attachment portion 32, the frame portion 31 supports the bed 11 from below, and the optional attachment portion 32 is disposed below the bed 11 while protruding in the left-right direction from the frame portion 31.

The frame portion 31 has a rectangular shape in plan view. The frame portion 31 includes a second vertical member 33 (vertical member) extending in the front-rear direction and a second horizontal member 34 (receiving member) extending in the left-right direction.

A pair of second vertical members 33 are provided at a spacing in the left-right direction.

A second horizontal member 34 is provided between the pair of left and right second vertical members 33, and the two second vertical members 33 are connected in the left-right direction. A plurality of second cross members 34, five in the illustrated example, are provided at intervals in the front-rear direction. The second horizontal member 34 is fixed so as not to move relative to the second vertical member 33. The end portions of the second vertical members 33 in the front-rear direction protrude in the front-rear direction beyond the second horizontal members 34 located on the outermost sides in the front-rear direction among the plurality of second horizontal members 34.

A pair of left and right optional mounting portions 32 is provided so as to sandwich the frame portion 31, and a pair of left and right optional mounting portions 32 is further provided at a distance in the front-rear direction. Each optional attachment portion 32 includes a pair of front and rear protruding members 35 extending in the left-right direction from the second vertical member 33, and an optional receiver 36 attached to the protruding members 35 so as to be slidable in the left-right direction. The optional receiving member 36 protrudes in the right-left direction from the bed 11. A falling prevention fence, not shown, is attached to and detached from the optional receiving member 36.

The main frame 26 is divided into a head-side frame 37 and a foot-side frame 38 along the front-rear direction. In the present embodiment, the pair of second vertical members 33 are divided into the head-side member 33a and the foot-side member 33b in the front-rear direction. The head member 37 is formed by connecting the pair of left and right head members 33a by two of the plurality of second cross members 34 positioned on the head side H. The foot side frame 38 is formed by connecting the pair of left and right foot side members 33b by three second cross members 34 positioned on the foot side F among the plurality of second cross members 34. A pair of left and right optional attachment portions 32 are disposed on the head-side frame 37 and the foot-side frame 38, respectively.

The head-side frame 37 is provided with a traction frame 39 and a first rotating member 43, the back chassis 16 is fixed to the traction frame 39, and the first rotating member 43 rotates the traction frame 39 (back chassis 16) about the first rotating shaft 23. Both the traction frame 39 and the first turning member 43 are formed in an inverted U shape that opens toward the head side H in a plan view.

The traction frame 39 includes a pair of floor support portions 40 provided at a distance in the left-right direction and a connection shaft 41, and the connection shaft 41 connects the end portions of the front-rear direction foot sides F of the floor support portions 40. The end portion of the coupling shaft 41 in the left-right direction protrudes in the left-right direction from the floor support portion 40.

As shown in fig. 10 and 11, the traction frame 39 is connected to the main frame 26 via a traction link 42. A pair of traction links 42 are provided across the traction frame in the left-right direction. The end portions of the coupling shafts 41 in the left-right direction are rotatably coupled to the end portions of the leg sides F of the traction links 42. The end portion of the head side H of each traction link 42 is rotatably connected to the main frame 26 via the first rotating shaft 23. The first rotating shaft 23 is rotatably connected to the main frame 26 by a traction link 42.

As shown in fig. 9 to 11, the first rotating member 43 includes a pair of left and right first push-up arm portions 43a extending in the left-right direction along the lower surface of the back floor 16, and a first connecting portion 43b (receiving member) connecting the pair of left and right first push-up arm portions 43a in the left-right direction. The first connecting portion 43b connects the end portion of the first push-up arm portion 43a on the foot side F. The first connecting portion 43b has a left-right end projecting in the left-right direction from the first upward-pushing arm portion 43a and is rotatably connected to the second vertical member 33. The end of the first push-up arm portion 43a on the head side H slidably abuts against the lower surface of the floor support portion 40.

In the head-side frame 37, the first pivoting member 43 pivots upward, so that the end portion of the first push-up arm portion 43a on the head side H slides on the lower surface of the floor support portion 40, and the first pivoting member 43 pushes up the pull-up frame 39. In this way, the traction link 42 rotates about the first rotating shaft 23, and the traction frame 39 rotates about the connecting shaft 41. As a result, as shown in fig. 9, the back floor 16 moves toward the head side H as a whole, the back floor 16 swings around the first rotation axis 23, and the back floor 16 is in a so-called back raised state inclined with respect to the horizontal plane.

The towing frame 39 in the back-lifted state is supported by a towing stay 44 extending in the front-rear direction. A traction stay 44 is provided between the traction frame 39 and the second cross member 34 located on the most head side H among the plurality of second cross members 34. The end of the leg side F of the pulling stay 44 is rotatably connected to the pulling frame 39, and the end of the head side H of the pulling stay 44 is rotatably connected to the second cross member 34. The traction stay 44 supports the traction frame 39 in the back-raised state obliquely from the head side H downward.

As shown in fig. 10 and 11, the foot side frame 38 is provided with a fixing member 45 and a second pivot member 46, the fixing member 45 fixes the leg bottom plate 18 via the second pivot shaft 24, and the second pivot member 46 pivots the leg bottom plate 18 about the second pivot shaft 24.

The fixing member 45 is provided on the second cross member 34 located closest to the head side H among the plurality of second cross members 34 constituting the foot side frame 38. The fixing member 45 protrudes from the second cross member 34 toward the foot side F. The end portion of the leg base plate 18 on the head side H is rotatably fixed to the fixing member 45 via the second rotating shaft 24.

The second rotating member 46 is rotatably coupled to the second vertical member 33 about a push-up shaft 47. A pair of push-up shafts 47 are provided sandwiching the second rotating member 46 in the left-right direction. The two push-up shafts 47 are arranged coaxially with each other.

The second turning member 46 is formed in an inverted U shape that opens toward the foot side F in plan view. The second pivoting member 46 includes a pair of left and right second push-up arm portions 48 extending in the front-rear direction along the lower surface of the leg bottom plate 18, and a second coupling portion 49 (receiving member) that couples the pair of left and right second push-up arm portions 48 in the left-right direction. The second coupling portion 49 couples the end portions of the second push-up arm portion 48 on the head side H to each other. The end of the second push-up arm portion 48 on the head side H is connected to the second vertical member 33 via a push-up shaft 47. The end of the second push-up arm portion 48 on the foot side F slidably abuts against the lower surface of the knee bottom plate 19.

In the foot side frame 38, the second pivot member 46 pivots upward, whereby the foot side F end of the second push-up arm portion 48 slides on the lower surface of the knee bottom plate 19, and the second pivot member 46 pushes up the knee bottom plate 19. As a result, as shown in fig. 9, the knee bottom plate 19 rotates about the first rotation axis 23, the end portion of the foot side F of the knee bottom plate 19 rises, while the foot bottom plate 20 relatively rotates about the bending axis 22, and the portion of the bed surface 21 corresponding to the knee is folded so as to protrude upward, so-called a leg-lifted state.

Further, a toe-raising stay 50 is provided on the foot floor 20. The toe-lifting stay 50 holds the leg bottom plate 18 in a toe-lifted state. The leg bottom plate 18 in the toe-up state rotates the foot bottom plate 20 upward about the bending shaft 22 after the leg bottom plate 18 becomes the leg-up state. The toe-lifting stays 50 extend in the front-rear direction along the lower surface of the foot sole 20. The toe-raising stay 50 is rotatably connected to the foot base plate 20 at the end of the foot side F. The tip-lifting stay 50 has the tip of the cephalad side H as a free end.

In the toe-raising stay 50, when the leg bottom plate 18 is in the toe-up state, the entire toe-raising stay 50 is turned downward and extends obliquely downward from the leg bottom plate 20 toward the head side H, and the end of the toe-raising stay 50 on the head side H is locked to the second vertical member 33.

Here, the end portion of the lumbar base plate 17 on the head side H is fixed to the traction frame 39, and the end portion of the lumbar base plate 17 on the foot side F is fixed to the fixing member 45. When the back floor 16 is raised and lowered, the end portion of the lumbar floor 17 on the head side H is raised and lowered together with the back floor 16, and the lumbar floor 17 is curved so as to extend in the front-rear direction and project downward as a whole.

In the support frame 12, the back bottom plate 16 and the leg bottom plate 18 are rotated from the standard state by the first rotating member 43 and the second rotating member 46, and the bed 11 is in a typical use state of back lifting and leg lifting (knee lifting) as shown by a two-dot chain line in fig. 9. When the bed 11 is changed from the standard state to the use state, the user can be effectively prevented from being dislocated with respect to the bed device B by performing the leg lifting before the back lifting.

As shown in fig. 10, 12, and 13, the lifting mechanism 27 lifts and lowers the main frame 26 relative to the base frame 25. The elevating mechanism 27 adopts a so-called X link structure. The lift mechanism 27 includes a first link 51, a second link 52, and a connecting rod 53 (receiving member).

A pair of first link 51 and second link 52 are provided at a distance in the left-right direction. Both the first link 51 and the second link 52 extend in the front-rear direction, and the center portions in the front-rear direction of the first link 51 and the second link 52 are rotatably connected to each other via a connection pin 54.

Four connecting rods 53 are provided. Each of the connecting rods 53 connects both end portions in the front-rear direction of each of the pair of left and right first links 51 and both end portions in the front-rear direction of each of the pair of left and right second links 52.

Of the four connecting rods 53, the connecting rod 53 connecting the end portion on the head side H of the first link 51 is rotatably connected to the first vertical member 28, and the connecting rod 53 connecting the end portion on the head side H of the second link 52 is rotatably connected to the second vertical member 33. Of the four connecting rods 53, the connecting rod 53 connecting the end portions of the foot sides F of the first links 51 is attached to the upper guide portion 55 provided on the second vertical member 33, and the connecting rod 53 connecting the end portions of the foot sides F of the second links 52 is attached to the lower guide portion 56 provided on the first vertical member 28. The upper guide portion 55 and the lower guide portion 56 support the connecting rod 53 slidably in the front-rear direction.

In the lifting mechanism 27, when the first link 51 is rotated upward, the second link 52 is also rotated upward in conjunction therewith. At this time, while the end portion of the foot side F of the first link 51 and the end portion of the foot side F of the second link 52 are guided to the head side H by the upper guide portion 55 or the lower guide portion 56, the first link 51 and the second link 52 rotate, and the main frame 26 is raised with respect to the base frame 25.

As shown in fig. 10 and 11, the driving mechanism 13 is attached to the support frame 12 and moves the movable portion 57 that is at least a part of the bed 11 and the support frame 12. The drive mechanism 13 is a direct drive actuator that extends and contracts in the front-rear direction, and moves the movable section 57 by extending and contracting in the front-rear direction. The drive mechanism 13 includes a floor drive mechanism 58 and a link drive mechanism 59, the floor drive mechanism 58 rotates the back floor 16 or the leg floor 18 (movable floor) as the movable portion 57, and the link drive mechanism 59 rotates the first link 51 or the second link 52 (link) as the movable portion 57.

The floor drive mechanism 58 includes a first drive mechanism 58a for rotating the back floor 16 and a second drive mechanism 58b for rotating the leg floor 18.

The first drive mechanism 58a is disposed in a portion of the support frame 12 located on the head side H in the front-rear direction. The first driving mechanism 58a extends in the front-rear direction, and thereby rotates the first rotating member 43 upward. The first drive mechanism 58a is provided between the second cross member 34 located closest to the head side H among the plurality of second cross members 34 and the first connecting portion 43 b. The first drive mechanism 58a is coupled to the second cross member 34 and the first coupling portion 43b via mounting members 60 that project from the second cross member 34 and the first coupling portion 43b, respectively. The first drive mechanism 58a is rotatably coupled to the mounting member 60.

The second driving mechanism 58b is disposed at the center in the front-rear direction of the support frame 12. The second driving mechanism 58b rotates the second rotating member 46 upward by extending in the front-rear direction. The second drive mechanism 58b is provided between the second cross member 34 positioned closest to the head side H among the plurality of second cross members 34 provided on the foot side frame 38 and the second coupling portion 49 of the second pivot member 46. The second drive mechanism 58b is coupled to the second cross member 34 and the second coupling portion 49 via mounting members 60 protruding from the second cross member 34 and the second coupling portion 49, respectively. The second drive mechanism 58b is rotatably coupled to the mounting member 60.

The link drive mechanism 59 is disposed in a portion of the support frame 12 located on the leg side F in the front-rear direction. The link drive mechanism 59 extends in the front-rear direction, and thereby rotates the first link 51 upward. The link driving mechanism 59 is provided between the first link 51 and the connecting rod 53 connecting the end portions of the leg sides F of the first link 51 among the plurality of connecting rods 53. The link driving mechanism 59 is connected to the connecting rod 53 via a mounting member 60 protruding from the connecting rod 53. The link drive mechanism 59 is coupled to the first link 51 via a conversion mechanism 61. The conversion mechanism 61 converts the telescopic motion of the link driving mechanism 59 into the rotational motion of the first link 51. The link drive mechanism 59 is rotatably coupled to the mounting member 60 and the conversion mechanism 61.

As shown in fig. 8 to 13, the plate 14 is fixed to the support frame 12 and rises upward with respect to the bed surface 21. There are a pair of front and rear plates 14, and the pair of plates 14 stands from both end portions of the second longitudinal member 33 in the front-rear direction.

The control unit 15 controls the drive mechanism 13. The control unit 15 is electrically connected to the drive mechanism 13. The power supply line C and an operation unit 501 described later are electrically connected to the control unit 15. The control unit 15 is supplied with power from the outside via the power line C, and inputs an instruction from the outside via the operation unit 501. That is, the control unit 15 controls the drive mechanism 13 based on an instruction from the operation unit 501 as shown in fig. 14.

Fig. 14 is a front view of the operation unit 501 applied to the bed device B. The operation unit 501 includes a second control unit 550, an input unit 551, a speaker 552, and a display unit 553 as in the first embodiment. As shown in fig. 14, the input unit 551 includes, in addition to the down switch 551a and the up switch 551b, a leg-down switch 551c, a leg-up switch 551d, a back-down switch 551e, a back-up switch 551f, an interlock (back/leg-down) switch 551g, and an interlock (back/leg-up) switch 551 h.

The leg falling switch 551c is a switch for moving the knee bottom plate 19 and the foot bottom plate 20 from the leg-raised state to the direction horizontal to the floor FL. When the knee bottom plate 19 and the foot bottom plate 20 are moved to the leg-up state, the leg-up switch 551d is operated. When the back floor 16 is moved from the back raised state in the direction horizontal to the floor FL, the back drop switch 551e is operated. When the back base plate 16 is moved to the back raised state, the back lift switch 551f is operated. When the back floor 16 and the knee floor 19 are moved from the back raised state and the leg raised state in conjunction with the state where the floor FL is horizontal, the back/leg fall switch 551g is operated. When the back bottom plate 16 and the knee bottom plate 19 are moved in a linked manner to move to the back raised state and the leg raised state, the back/leg raising switch 551h is operated.

The present invention is not limited to the above embodiments, and for example, the following modifications are also conceivable.

(1) In the above embodiments, the speaker 552 emits a buzzer sound in a pattern as shown in fig. 6, but the present invention is not limited to this. The speaker 552 may also perform information notification by sound. If the information notification is made by voice, the operator can more easily recognize the height h of the bed 200 from the floor FL.

(2) The first control unit 440 may display the notification information of different modes on the display unit 553 according to the height h of the bed 200 from the floor FL. The display portion 553 may have an LED lamp or the like and emit light in different patterns (on/off intervals, colors, combinations thereof, or the like) according to the height h of the bed 200 from the floor FL. In this case, the display portion 553 can function as the notification portion in the present invention.

(3) Fig. 7 is a functional block diagram of a modification of the drive mechanism 300, the control mechanism 400, and the operation unit 500. As shown in fig. 7, the operation unit 500 may further include a vibration generating unit 554, and the first and second control units 440 and 550 may vibrate the vibration generating unit 554 in different modes according to the height h of the bed 200 from the floor FL. If the operation unit 500 includes the vibration generating unit 554, the operator can recognize the change in the height h of the bed 200 from the floor FL by the vibration pattern of the operation unit 500 at hand. In this case, the vibration generating portion 554 can function as a notification portion in the present invention.

Further, a configuration including at least one of the speaker 552, the display unit 553, and the vibration generating unit 554 as the notification unit can be employed.

(4) In each of the above embodiments, the buzzer sound is generated only when the height h of the bed 200 from the floor FL is equal to or less than the temporary stop height during the lowering operation of the bed 200, but the present invention is not limited to this. A buzzer sound may be generated inevitably when the bed 200 is lowered. Further, a buzzer sound may be generated even when the bed 200 is lifted.

(5) In the above embodiments, the environment detection unit 442 is an illuminance sensor, and the first control unit 440 changes the sound pressure of the buzzer sound based on the input from the environment detection unit 442, but the present invention is not limited to this. The environment detection unit 442 may be an acoustic sensor such as a microphone. The environment detection unit 442 can be appropriately a detection unit that detects a change in the surrounding environment. For example, a timepiece can be used as the environment detection unit 442, and the volume pattern of the buzzer sound is changed according to time, for example, by reducing the sound pressure of the buzzer sound at night.

The first control unit 440 may change the frequency of the buzzer sound based on a signal from the environment detection unit 442. In this case, for example, the frequency as the buzzer sound may be set so as to be switchable between 2.7kHz and 1.2 kHz.

(6) Further, the control means 400 includes the environment detection unit 442, but the present invention is not limited to this. The operation unit 500 may include the environment detection unit 442. The support stand 100 may include the environment detection unit 442.

(7) In the above embodiment, the buzzer sounds in different patterns are emitted from the speaker 552 by changing the unit interval time t3 according to the height h of the bed 200 from the floor FL, but the present invention is not limited to this. For example, different patterns of the buzzer sounds may be emitted from the speaker 552 by changing at least one of the sound pressure of the buzzer sounds and the frequency of the buzzer sounds according to the height h of the bed 200 from the floor FL. In this case, the operator can visually recognize the mode of the notification information sound, and can recognize the change in the height h of the bed 200 from the floor FL without visually recognizing the height h of the bed 200.

(8) In the above embodiment, the buzzer sound is sounded simultaneously with the lowering operation of the bed 200, but the present invention is not limited to this. The buzzer may be sounded before the lowering operation of the bed 200. If the buzzer is sounded before the lowering operation, the operator can operate the bed 200 safely in anticipation of the operation. Further, in addition to the lowering operation of the bed 200, a buzzer sound may be sounded during the raising operation.

(9) When the rotation speed of the motor 330 is variable, if the height h of the bed 200 from the floor FL is equal to or less than the temporary stop height, the first control unit 440 decreases the rotation speed of the motor 330 to delay the lowering speed of the bed 200.

(10) In each of the above embodiments, the unit interval period t3 is shorter as the height h of the bed 200 from the floor FL is lower, but the present invention is not limited to this. For example, the unit interval period t3 may be constant, but the lower the height h of the bed 200 from the floor FL, the shorter the period of one unit U (2 × t1+ t 2). Further, the sound emission period t1 and the sound deadening period t2 may be alternately repeated without the unit interval period t3, and at least one of the sound emission period t1 and the sound deadening period t2 may be set to be shorter as the height h of the bed 200 from the floor FL is lower. In the case of such a configuration, the sound emission period t1 functions as the sound emission period of the present invention, and the silence period t2 functions as the silence period of the present invention.

Industrial applicability

According to the bed device according to one aspect of the present invention, the control unit causes the notification unit to notify notification information of different modes according to the height of the bed from the floor FL. Therefore, the operator can confirm the height of the bed from the floor FL without seeing the bed by recognizing the notification information, and thus can easily recognize the change in the height of the bed.

Claims (2)

1. An electric bed is characterized by comprising:

a bed, which is provided with a bottom plate,

a main frame supporting the base plate;

a lifting mechanism supporting the main frame;

a drive mechanism that raises and lowers the bed;

a control unit connected to the drive mechanism; and

a notification section connected to the control section,

the notification unit generates a buzzer sound in a mode in which a sound emission period is gradually shortened based on a height of the bed from a floor when the bed is lowered,

when the bed is lowered and reaches a temporary stop height, the lowering of the bed is temporarily stopped, the notification unit generates a buzzer sound indicating that the bed reaches the temporary stop height,

while the bed is lowered again, the notification unit continues to emit the buzzing sound including a sound emission period during which the bed is emitted, a sound deadening period during which the bed is not emitted after the sound emission period, and a sound emission period during which the bed is emitted after the sound deadening period, wherein the sound emission period is gradually shortened.

2. An electric bed is characterized by comprising:

a bed having a plurality of bottom panels including a back panel, a waist panel, and a leg panel;

a main frame supporting the plurality of bottom plates;

a lifting mechanism supporting the main frame;

a drive mechanism that raises and lowers the bed;

a control unit connected to the drive mechanism; and

a notification section connected to the control section,

when the height of the bed from the floor reaches a preset temporary stop height, the notification part sends out a buzzing sound indicating that the bed reaches the temporary stop height,

the notification unit continues to generate beeps including a sound generation period during which the bed is lowered again, a sound deadening period during which the bed is not sounded after the sound generation period, and a sound generation period during which the bed is sounded after the sound deadening period,

the sound emission period, the sound deadening period, and the sound emission period are defined as a unit, the unit is sounded a plurality of times during a unit interval, and the unit interval period or the unit period is gradually shortened.

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