JP2022168214A - Bed device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bed device in which a change in the height of a bed can be easily recognized.

SOLUTION: A bed device A includes a bed 200, a drive mechanism 300 for lifting and lowering the bed, a control unit for controlling the drive mechanism, and a notification unit for notifying of notification information based on a command from the control unit. The control unit causes the notification unit to notify of the notification information of different patterns according to the height of the bed from a floor.

SELECTED DRAWING: Figure 1

COPYRIGHT: (C)2023,JPO&INPIT

Description

The present invention relates to a bed device.

For example, Patent Literature 1 discloses an electric bed provided with a lifting device for lifting a bed frame and a switch for operating the lifting device. Further, Patent Literature 2 discloses an electric bed whose bed frame can be raised and lowered step by step. Further, Patent Document 3 discloses an electric bed in which the raising and lowering speed of the bed frame is variable. These bed apparatuses can raise and lower the bed frame and adjust the height of the bed by operating a switch.

JP-A-2004-159807 JP 2014-076214 A Japanese Patent No. 5690033

These electric beds are lifted and lowered by a user of the electric bed or a caregiver of the user (hereinafter referred to as an operator) while visually confirming the height of the bed supported by the bed frame from the floor. At this time, the operator often looks from above, and it may be difficult to visually recognize the height of the bed. In particular, for example, in a dark room, it is difficult to visually recognize the height of the bed. If the height of the bed cannot be recognized, there is a risk that items (for example, nursing care products) placed around the bed device may be caught between the bed and the floor.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and an object of the present invention is to make it easier to recognize changes in the height of a bed.

In order to achieve the above object, in the present invention, as a first invention, a bed, a drive mechanism for raising and lowering the bed, a control unit for controlling the drive mechanism, and a notification based on a command from the control unit and a notification unit for notifying information, wherein the control unit employs means for causing the notification unit to notify different patterns of notification information according to the height of the bed from the floor.

According to this aspect of the invention, the reporting unit reports different patterns of notification information according to the height of the bed from the floor. Thereby, the operator can grasp the height of the bed by recognizing this notification information without visually confirming the height of the bed. Therefore, the operator can easily recognize the change in height of the bed.

As a second invention, in the first invention, the control unit causes the drive mechanism to temporarily stop the descent of the bed when the height of the bed from the floor reaches a preset temporary stop height. adopt the means of letting

In this case, the drive mechanism stops operating when the height of the bed from the floor reaches the temporary stop height. As a result, 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 check whether there is an obstacle between the bed and the floor.

As a third aspect of the invention, in the second aspect of the invention, the control unit employs means for causing the notification unit to notify the notification information only when the bed is equal to or lower than the temporary stop height.

In this case, the notification unit notifies the notification information only when the height of the bed from the floor is equal to or lower than the height of the temporary stop. Accordingly, by recognizing the notification information, 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.

As a fourth invention, in the first to third inventions, the notification unit includes a speaker, and the control unit outputs notification information sounds of different patterns according to the height of the bed from the floor to the speaker. Adopt a means of making the sound pronounce.

In this case, the speaker emits notification information sounds of different patterns according to the height of the bed from the floor. As a result, the operator can recognize the change in the height of the bed from the floor by recognizing the pattern of the notification information sound without visually confirming the height of the bed.

As a fifth invention, in the fourth invention, the notification information sound has a pattern in which a sounding period, which is a period in which the sound continues to sound, and a silent period, which is a period in which the sound does not sound, are alternately repeated, At least one of the sound generation period and the silence period is set to be shorter as the height of the bed from the floor becomes lower.

In this case, as the height of the bed from the floor becomes lower, at least one of the sounding period and the silent period of the notification information sound is set to be shorter. As a result, the operator can intuitively recognize the pattern of notification information sounds, and can recognize changes in the height of the bed from the floor without visually confirming the height of the bed. can.

As a sixth invention, in the fourth or fifth invention, when the lowering of the bed is stopped, the control unit emits a stop sound to the speaker to notify that the lowering of the bed has stopped. adopt the means of letting

In this case, when the lowering of the bed stops, a stop sound is produced from the speaker. Thereby, the operator can recognize that the lowering of the bed has stopped without visually confirming.

As a seventh aspect of the invention, in any one of the fourth to sixth aspects of the invention, further comprising a detection unit for detecting an environmental change around the bed, wherein the control unit, based on an input from the detection unit, A means of changing at least one of the sound pressure of the notification information sound and the frequency of the notification information sound is adopted.

In this case, the speaker emits a notification information sound having a sound pressure or a frequency corresponding to environmental changes around the sleeping apparatus. Therefore, it is possible to prevent the surrounding environment from being disturbed by the notification information sound.

As an eighth invention, in the above-described first to seventh inventions, an operation unit for inputting a lifting instruction is further provided, the notification unit includes a vibration generation unit for vibrating the operation unit, and the control unit includes the above-described A means is adopted in which the vibration generator oscillates different patterns of vibration according to the height of the bed from the floor.

In this case, the vibration generator oscillates different patterns of vibration according to the height of the bed from the floor. Accordingly, by recognizing the vibration pattern, the operator can recognize the change in the height of the bed from the floor without visually confirming the height of the bed.

As a ninth invention, in the above first to eighth inventions, the notification unit includes a display unit for displaying notification information, and the warning display of a different pattern according to the height of the bed from the floor is displayed. Adopt a means of displaying it in the department.

In this case, the display unit displays different warning patterns depending on the height of the bed from the floor. Accordingly, the operator can recognize the change in the height of the bed from the floor by recognizing the display on the display unit.

According to the present invention, the control unit causes the notification unit to notify different patterns of notification information according to the height of the bed from the floor. Therefore, by recognizing the notification information, the operator can confirm the height of the bed from the floor without looking at the bed, so that the change in the height of the bed can be easily recognized.

1 is a side view of a bed device according to a first embodiment of the present invention; FIG. It is a functional block diagram of the driving mechanism, the controller, and the operating section of the same bed device. FIG. 4 is a front view of an operation section of the bed device according to the first embodiment of the present invention; 4 is a flow chart showing an outline of a bed lowering operation of the bed apparatus according to the first embodiment of the present invention; 4 is a flow chart showing the details of the operation of the bed apparatus according to the first embodiment of the present invention when the bed is lowered. It is an example of the pattern of the buzzer sound produced by the speaker of the bed apparatus according to the first embodiment of the present invention. FIG. 5 is a functional block diagram of a modification of the drive mechanism, controller, and operation section of the bed apparatus according to the first embodiment of the present invention; FIG. 5 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 couch device shown in FIG. 8; FIG. 9 is an exploded perspective view of a support base that constitutes the bed device shown in FIG. 8; FIG. 11 is a plan view of the support frame shown in FIG. 10; FIG. 11 is a side view of the support cradle shown in FIG. 10; FIG. 11 is a side view of the support frame shown in FIG. 10, showing a state in which the main frame is lifted by the lifting mechanism; FIG. 11 is a front view of an operation unit applied to a bed device according to a second embodiment of the present invention;

[First embodiment]
A first embodiment of a bed device according to the present invention will be described below with reference to FIGS. 1 to 5. FIG. FIG. 1 is a side view of a bed device A according to this embodiment. Note that the H direction in FIG. 1 is the direction in which the head of the user of the bed apparatus A is located, and the F direction is the direction in which the user's feet are located. In the following description, the H direction (head side) is the forward direction, the F direction (foot side) is the rearward direction, and the right side and the left side when lying on your back on a bed 200 described later are defined as left. The bed apparatus A has a support frame 100 , a bed 200 , a drive mechanism 300 , a controller 400 and an operation section 500 .

The support frame 100 includes a base frame 110 , a main frame 111 , an elevating mechanism 120 and a board 130 . The base frame 110 is a rectangular member installed on the floor (installation surface). This base frame 110 has a leg member 10a installed at the end that contacts the floor surface. The leg member 100a is a rubber cover member installed to prevent damage to the floor surface due to concentration of load on the floor surface.

The main frame 111 is a rectangular frame member when viewed from the floor side, and directly supports the bed 200 . The main frame 111 also has an option mounting portion 110a. A pair of option mounting portions 110a are provided on the left and right sides of the main frame 111, and are also spaced apart in the front-rear direction. These option mounting portions 110a are members for fixing a fall prevention rail (not shown).

The lifting mechanism 120 has a first link 120a, a second link 120b, and a connecting pin 120c. 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 fixed to the main frame 111 so as to be slidable in the longitudinal direction. The second link 120b is a rod-shaped member that connects between the base frame 110 and the main frame 111 like the first link 120a, and is installed to cross the first link 120a. The second link 120b is fixed to the main frame 111 and fixed to the base frame 110 so as to be slidable in the longitudinal direction.

The connecting pin 120c connects the first link 120a and the second link 120b so that both members can rotate around the intersection position of the first link 120a and the second link 120b. A pair of such elevating mechanisms 120 are provided on the left and right with respect to the front direction. These elevating mechanisms 120 are members that support the main frame 111 so that the main frame 111 can be raised and lowered by the first link 120a and the second link 120b.

The board 130 is fixed to the support frame 12 and rises above the bed surface 21 . A pair of front and rear boards 130 are provided, and stand up from both ends of the second vertical member 33 in the front-rear direction.

The support frame 100 having such a configuration supports the bed 200 by connecting the main frame 111 that directly supports the bed 200 and the base frame 110 that is directly installed on the floor by the elevating mechanism 120 . Further, the support frame 100 enables the bed 200 supported by the main frame 111 to be raised and lowered by the lifting mechanism 120 . The bed 200 is a flat member, and is arranged on the support base 100 as shown in FIG. A mattress (not shown) is placed on the bed 200 as described above.

FIG. 2 is a functional block diagram of the drive mechanism 300, the controller 400, and the operation section 500. As shown in FIG. The driving mechanism 300 is connected to the first link 120 a by a connecting portion (not shown) so that the movement thereof is transmitted to the first link 120 a, and is installed inside the main frame 111 . The drive mechanism 300 has a motor 330 and a position information detector 331, as shown in FIG. The motor 330 has a rotating shaft (not shown) that rotates, and generates power for raising and lowering the bed 200 . The position information detection unit 331 detects the amount of rotation of the motor 330 as information about the height of the bed 200 from the floor (installation surface of the base frame) from the amount of rotation, and inputs the information to the first control unit 440 described later. Such a drive mechanism 300 is connected to a power source (not shown), and rotates the first link 120a clockwise or counterclockwise according to an instruction from the first controller 440 to move the bed 200 up and down.

The controller 400 is fixed to the support frame 100 and connected to a power source (not shown). This controller 400 has a first control section 440 , a storage section 441 and an environment detection section 442 . The first control section 440 controls the motor 330 based on the data acquired from the position information detection section 331 . Also, the first control unit 440 determines the brightness of the room from the signal input from the environment detection unit 442 and transmits an instruction regarding 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 .

Storage unit 441 is a memory that transmits and receives data to and from first control unit 440 in response to a request from first control unit 440 . In addition, the storage unit 441 stores the maximum floor height, which is the maximum height of the bed 200 from the floor, the temporary stop height, the minimum floor height, which is the lower limit height at which the bed 200 can be lowered, and the buzzer sound. patterns and programs executed by the first control unit 440 are stored in advance. The temporary stop height is the height above the floor at which the bed 200 stops moving downward, and is determined in advance when the bed device A is manufactured. In addition, in this embodiment, as an example, the temporary stop height is set to 29 cm (290 mm). The environment detection unit 442 (detection unit) is an illuminance sensor that detects the brightness in the room where the bed device A is installed. Environment detection unit 442 outputs a signal of the detected illuminance to first control unit 440 .

FIG. 3 is a front view of the operation unit 500. FIG. The operation unit 500 is connected to the controller 400 by a cable (not shown). The operation unit 500 includes a second control unit 550, an input unit 551, a speaker 552, and a display unit 553, as shown in FIG. The second control section 550 controls the speaker 552 and the display section 553 based on the instruction from the first control section 440 and the signal input from the input section 551 . In addition, the first control unit 440 and the second control unit 550 function as a control unit in the present invention by cooperating.

The input unit 551, as shown in FIG. 3, has a down switch 551a, an up switch 551b, and a volume control button (not shown). The lowering switch 551a is a switch operated by the operator to lower the bed 200. As shown in FIG. The lift switch 551b is a switch operated by the operator to lift the bed 200 . Note that the down switch 551a and the up switch 551b are ON only while the operator continues to press them. The volume control button is a button for the operator to adjust the volume of the speaker 552 . Also, the operator can set the buzzer so that the buzzer does not sound by operating the volume control button.

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

Such a bed device A is an electric bed in which the height of the bed 200 from the floor can be adjusted by the user or the user's caregiver. An operation for raising and lowering the bed 200 by the operator is input from an operation unit 500 placed at the operator's hand. The bed device A raises and lowers the bed 200 based on this input. Also, FIG. 4 is a flow chart 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 of the bed 200 from the floor reaches the suspension height, a buzzer (pause sound) is sounded from the speaker 552, and the lowering motion of the bed 200 is stopped (step S2). Further, when the lowering switch 551a is pressed again, the bed 200 is lowered again with a buzzer sound (lowering sound) (step S3). When the height of the bed 200 from the floor reaches the minimum floor height, a buzzer (final stop sound) is sounded from the speaker 552, and the descent of the bed 200 is stopped (step S4).

Next, the operation of the bed apparatus A when the bed 200 is lowered will be described in detail with reference to FIGS. 5 and 6. FIG. FIG. 5 is a flow chart showing the details of the operation when the bed 200 is lowered.

First, it is determined whether the lowering switch 551a is ON (step S1). Here, the second control section 550 determines whether or not the lowering switch 551a is ON. If it is determined that the descent switch 551a is not ON, the descent of the bed 200 is stopped (step S12). If it is determined that the lowering switch is ON, it is determined whether the bed height is higher than the temporary stop height (step S13). Here, the first control unit 440 compares the height of the bed 200 from the floor acquired from the position information detection unit 331 with the temporary stop height (29 cm) stored in the storage unit 441 .

If it is determined that the height of the bed 200 from the floor is higher than the suspension height, that is, if the determination in step S13 is YES, the first control unit 440 rotates the motor 330 to lower the bed 200. (step S14). Next, it is determined whether the height of the bed 200 from the floor is the temporary stop height (step S15). Here, the first control unit 440 compares the height of the bed 200 from the floor acquired from the position information detection unit 331 with the temporary stop height stored in the storage unit 441 . If the height of the bed 200 from the floor is higher than the suspension height, that is, if the determination in step S15 is NO, the process returns to step S2.

When the height of the bed 200 from the floor reaches the temporary stop height, that is, when the determination in step S15 becomes YES, the first control unit 440 stops the operation of the motor 330 to stop the lowering of the bed 200. (Step S16). Furthermore, the first control unit 440 causes the speaker 552 to emit a buzzer sound indicating that the bed 200 has reached the temporary stop height (step S17). Note that the operations of steps S16 and S17 may be performed in any order, and step S17 may be performed first and then step S16 may be performed.

Subsequently, it is determined whether or not the descending switch is ON even after the buzzer is sounded (step S18). Here, the first control unit 440 determines whether the lowering switch 551a is ON. If the lowering switch 551a is ON, that is, if the determination in step S18 is YES, the first control unit 440 stops lowering the bed 200 (step S19), and returns to step S18 again. When the bed 200 is lowered from a position higher than the suspension height, the bed 200 continues to be stopped at the suspension height even if the user keeps pressing the lowering switch 551a. That is, even if the operator continues to press the lowering switch 551a, the bed 200 does not lower in step S19.

On the other hand, if the descent switch 551a is not ON, that is, if the determination in step S18 is NO, the process returns to step S2. In this manner, the operator needs to press the lowering switch 551a again in order to make the height of the bed 200 lower than the temporary stop height. When the operator presses down switch 551a again and a signal is input to second control unit 550, the determination in step S2 becomes YES, and the process proceeds to step S13.

In step S13, if the height of the bed 200 from the floor is equal to or less than the suspension height, that is, if the determination is NO, the buzzer sounds in a buzzer sound pattern corresponding to the height according to the unit interval period t3 in Table 1. is pronounced (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 the pattern of the buzzer sounds produced by the speaker 552 . In FIG. 6, t1 indicates a sounding period (100 ms) during which sound (buzzer sound) continues to be emitted from the speaker 552, and t2 indicates a silent period (50 ms) during which no sound is emitted from the speaker 552. . In other words, in the diagram shown in FIG. 6, the horizontal direction of the paper indicates the time, and the vertical direction of the paper indicates the presence or absence of the buzzer sound. sounds, and when the solid line is located on the lower side of the paper surface, it means that no sound is produced from the speaker 552 . t3 indicates a unit interval period (variable).

One unit of the buzzer sound consists of a sounding period, a silent period, and a sounding period, and this unit U (see FIG. 6) is sounded a plurality of times with a unit interval period t3 to call the operator's attention. Note that the unit interval period t3 of this buzzer sound is set so that the lower the height of the bed 200 from the floor, the shorter the unit interval period t3 according to Table 1 shown below. That is, the pattern of the buzzer sound changes according to the height of the bed 200 from the floor. Note that the output value of the height of the bed 200 from the floor detected by the position information detection unit 331 is in units of centimeters (cm) in which the decimal point is truncated.

Returning to FIG. 5, following step S20, the first control unit 440 controls the motor 330 to start lowering the bed 200 (step S21). Next, the first control unit 440 determines whether the height of the bed 200 from the floor has reached the minimum floor height, which is the lower limit of the height at which the bed 200 can be lowered (step S22). If it is higher than the minimum floor height, that is, if the determination in step S22 is NO, the process returns to step S2. If it is the minimum floor height, that is, if the determination in step S22 is YES, the first control unit 440 stops lowering of the bed 200 (step S23). At this time, when the lowering of the bed 200 is stopped, a long stop buzzer sound (stop sound) may be sounded.

The bed apparatus A of this embodiment includes, as control units, a first control unit 440 and a second control unit 550 that cause the speaker 552 to generate buzzer sounds of different patterns according to the height of the bed 200 from the floor. I have. Thereby, the operator can confirm the change in the height of the bed 200 from the floor without visually confirming the height of the bed.

Further, the couch device A of this embodiment includes a storage unit 441 that stores the temporary stop height. Accordingly, when the height of the bed 200 from the floor reaches the temporary stop height, the first control unit 440 temporarily stops lowering the bed 200 even if the operator continues to press the lowering switch 551a. Therefore, the operator who recognizes that the lowering of the bed 200 has stopped can check whether there is an obstacle between the bed 200 and the floor.

Further, the bed device A of this embodiment includes an environment detection unit 442 . Thereby, the first control unit 440 can set the sound pressure of the buzzer sound produced by the speaker 552 according to the brightness of the room in which the bed device A is installed. Therefore, the buzzer sound is generated at a volume suitable for the surrounding environment and the situation of the user of the bed apparatus A, such as when sleeping. In other words, it is possible to prevent the surrounding environment from being disturbed by the buzzer sound.

[Second embodiment]
A modified example of the support frame, the bed and the driving mechanism of the bed apparatus according to the present invention will be described below as a second embodiment with reference to FIGS. 8 to 14. FIG. In addition, in the bed apparatus B according to the present embodiment, the same reference numerals are used for the parts that are common to the first embodiment, and the description thereof is omitted.

As shown in FIGS. 8 to 14, the bed device B includes a bed 11, a support frame 12, a drive mechanism 13, a board 14, a control section 15, and an operation section 501. FIG. 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 plan view. The bed 11 has a back bottom 16, a waist bottom 17, and a leg bottom 18. These back bottom 16, waist bottom 17, and leg bottom 18 extend from the head side H to the foot side F. They are in order. The leg bottom 18 has a knee bottom 19 and a leg bottom 20, and these knee bottoms 19 and leg bottoms 20 are arranged in this order from the head side H to 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 (knee bottom 19 and leg bottom 20 ) each form part of a bed surface 21 . The back bottom 16 corresponds to the portion supporting the back of the user on the bed surface 21, the waist bottom 17 corresponds to the portion supporting the waist of the user on the bed surface 21, and the leg bottom 18 corresponds to the portion supporting the user's waist on the bed surface 21. It corresponds to the part that supports the legs of the upper user. The knee bottom 19 corresponds to the portion supporting the user's knees and hips on the bed surface 21, and the leg bottom 20 corresponds to the portion supporting the user's knees to the toes on the bed surface 21. - 特許庁The waist bottom 17 is formed to be stretchable in the front-rear direction. Knee bottom 19 and leg bottom 20 are rotatably connected about bending shaft 22 extending in the left-right direction.

The bed surface 21 is an orthogonal plane perpendicular to the vertical direction in a standard state before the bed 11 is deformed (eg, rotated with undulation) by the driving mechanism 13 such as raising the back or raising the knees. The bed surface 21 is formed in a rectangular shape that is 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 the front-rear direction, and the lateral direction of the bed surface 21 is the left-right direction. A mattress (not shown) is placed on the bed surface 21 .

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

The base frame 25 is installed on the installation surface S 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 with an interval in the left-right direction.
The first horizontal member 29 is laid over a pair of left and right first vertical members 28 and connects the first vertical members 28 in the left-right direction. A pair of first horizontal members 29 are provided with an interval in the front-rear direction. The first transverse member 29 is immovably fixed to the first longitudinal member 28 .

The ends of the first vertical member 28 in the front-rear direction protrude further outward in the front-rear direction than the first horizontal member 29, and each of these ends is fitted with a leg member 30 for installation. In the illustrated example, a rubber cover is used as the leg member 30, but it is also possible to use casters instead of the rubber cover.

The main frame 26 directly supports the bed 11. - 特許庁The main frame 26 includes a frame portion 31 that supports the bed 11 from below, and an option mounting portion 32 that projects laterally from the frame portion 31 and is arranged below the bed 11 .
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 the second vertical members 33 are provided with an interval in the left-right direction.
The second horizontal member 34 spans the pair of left and right second vertical members 33 and connects the two second vertical members 33 in the left-right direction. A plurality of second horizontal members 34, five in the illustrated example, are provided at intervals in the front-rear direction. The second horizontal member 34 is immovably fixed to the second vertical member 33 . An end portion of the second vertical member 33 in the front-rear direction protrudes in the front-rear direction more than the second horizontal member 34 positioned outermost in the front-rear direction among the plurality of second horizontal members 34 .

A pair of left and right option mounting portions 32 are provided with the frame portion 31 interposed therebetween, and a pair of left and right option mounting portions 32 are provided with a space therebetween in the front-rear direction. Each option mounting 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 option receiver 36 attached to both the protruding members 35 so as to be slidable in the left-right direction. there is The option receiver 36 protrudes laterally from the bed 11. - 特許庁A fall prevention rail (not shown) is attached to and detached from the option receiver 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 this embodiment, each of the pair of second vertical members 33 is divided into a head-side member 33a and a foot-side member 33b along the front-rear direction. A head-side frame 37 is formed by connecting the pair of left and right head-side members 33a with two of the plurality of second horizontal members 34 positioned on the head side H. A pair of left and right foot-side members 33b are connected by three second horizontal members 34 located on the foot side F of the plurality of second horizontal members 34, thereby forming a foot-side frame 38. As shown in FIG. A pair of left and right option mounting portions 32 are arranged on each of the head side frame 37 and the foot side frame 38 .

The head-side frame 37 is provided with a retractable frame 39 to which the back bottom 16 is fixed, and a first rotating member 43 that rotates the retractable frame 39 (back bottom 16) around the first rotating shaft 23. ing. Both the retort frame 39 and the first rotating member 43 are formed in an inverted U shape opening toward the head side H in plan view.
The retractor frame 39 includes a pair of bottom support portions 40 that are spaced apart in the left-right direction, and a connecting shaft 41 that connects end portions of the bottom support portions 40 on the foot side F in the front-rear direction. Left-right ends of the connecting shaft 41 protrude from the bottom support portion 40 in the left-right direction.

As shown in FIGS. 10 and 11 , the retractor frame 39 is connected to the main frame 26 via a retractor link 42 . A pair of the retracing links 42 are provided on both sides of the retracing frame 39 in the left-right direction. The left-right end of the connecting shaft 41 is rotatably connected to the foot-side F end of each retractor link 42 . The head-side H end of each retractor link 42 is rotatably connected to the main frame 26 via the first rotating shaft 23 . The first rotating shaft 23 rotatably connects the retractor link 42 to the main frame 26 .

As shown in FIGS. 9 to 11, the first rotating member 43 includes a pair of left and right first push-up arm portions 43a extending in the front-rear direction along the lower surface of the back bottom 16, and a pair of left and right first push-up arm portions 43a. and a first connecting portion 43b (receiving member) that connects 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. As shown in FIG. The left-right end of the first connecting portion 43b protrudes in the left-right direction from the first push-up arm portion 43a and is rotatably connected to the second vertical member 33. As shown in FIG. The head-side H end of the first push-up arm 43a abuts the lower surface of the bottom support 40 in a slidable manner.

In the head-side frame 37, the head-side H end of the first push-up arm 43a slides against the bottom surface of the bottom support 40 by rotating the first rotating member 43 upward. , the first rotating member 43 pushes up the retort frame 39 . Then, the retracing link 42 rotates about the first rotating shaft 23 and the retracing frame 39 rotates about the connecting shaft 41 . As a result, as shown in FIG. 9, while the entire back bottom 16 moves toward the head side H, the back bottom 16 rotates up and down around the first rotation shaft 23, and the back bottom 16 inclines with respect to the horizontal plane. This is a so-called back-raised state.

The retractor frame 39 in the back-raised state is supported by a retractor stay 44 extending in the front-rear direction. The retracing stay 44 is provided between the retracing frame 39 and the second lateral member 34 positioned closest to the head side H among the plurality of second lateral members 34 . The leg-side F end of the retracing stay 44 is rotatably connected to the retracing frame 39 , and the head-side H end of the retracing stay 44 is rotatably connected to the second horizontal member 34 . there is The retracing stay 44 supports the retracing frame 39 in a back-raised state from obliquely downward on the head side H.

As shown in FIGS. 10 and 11, the foot-side frame 38 includes a fixing member 45 to which the leg bottom 18 is fixed via the second rotation shaft 24, and a fixing member 45 that rotates the leg bottom 18 around the second rotation shaft 24. A second rotating member 46 for rotating is provided.
The fixing member 45 is provided on the second horizontal member 34 positioned closest to the head side H among the plurality of second horizontal members 34 forming the leg-side frame 38 . The fixing member 45 protrudes from the second horizontal member 34 toward the foot side F. The head-side H end of the leg bottom 18 is rotatably fixed to the fixing member 45 via the second rotating shaft 24 .

The second rotating member 46 is connected to the second vertical member 33 so as to be rotatable around the push-up shaft 47 . A pair of push-up shafts 47 are provided on both sides of the second rotating member 46 in the left-right direction. Both push-up shafts 47 are arranged coaxially with each other.

The second rotating member 46 is formed in an inverted U shape opening on the foot side F in a plan view. The second rotating 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 18, and a second connecting portion that connects the pair of left and right second push-up arm portions 48 in the left-right direction. 49 (receiving member). The second connecting portion 49 connects the ends on the head side H of the pair of left and right second push-up arm portions 48 . The head-side H end of the second push-up arm 48 is connected to the second vertical member 33 via a push-up shaft 47 . The foot-side F end of the second push-up arm 48 slidably contacts the lower surface of the knee bottom 19 .

In the foot-side frame 38, the second rotating member 46 rotates upward, so that the foot-side F end of the second push-up arm 48 slides on the lower surface of the knee bottom 19, The second rotating member 46 pushes up the knee bottom 19 . Then, as shown in FIG. 9 , the knee bottom 19 rotates about the first rotation shaft 23 , and the end of the knee bottom 19 on the foot side F rises, while the leg bottom 20 moves relative to the bending axis 22 . The bed surface 21 rotates around, and the portion corresponding to the knee on the bed surface 21 bends upward to form a so-called leg-raised state.

The leg bottom 20 is provided with a toe lifting stay 50 . The toe lifting stay 50 holds the leg bottom 18 in the toe lifting state. The leg bottom 18 in the toe-up state is formed by turning the leg bottom 20 upward around the bending shaft 22 after the leg bottom 18 is in the leg-up state. The toe raising stay 50 extends in the front-rear direction along the lower surface of the leg bottom 20 . The foot side F end of the toe lifting stay 50 is rotatably connected to the foot bottom 20 . The head-side H end of the toe lifting stay 50 is a free end.
In the toe lifting stay 50, when the leg bottom 18 is in the toe lifting state, the toe lifting stay 50 as a whole rotates downward and is tilted diagonally downward from the leg bottom 20 toward the head side H. , and the head-side H end of the toe raising stay 50 is locked to the second vertical member 33 .

Here, the head-side H end of the waist bottom 17 is fixed to the retractor frame 39 , and the foot-side F end of the waist bottom 17 is fixed to the fixing member 45 . When the back bottom 16 rotates up and down, the end of the head side H of the waist bottom 17 rises and falls together with the back bottom 16, and the waist bottom 17 as a whole protrudes downward while extending in the front-rear direction. curved into.

In the support frame 12, the first rotating member 43 and the second rotating member 46 rotate the back bottom 16 and the leg bottom 18 from the above-described standard state, so that the bed 11 moves to the position shown by the two-dot chain line in FIG. A typical usage state in which the back is raised and the legs are raised (knees are raised) as shown in . When the bed 11 is changed from the standard state to the use state, the user can be effectively prevented from slipping with respect to the bed device B by raising the legs prior to raising the back.

As shown in FIGS. 10 , 12 and 13 , the elevating mechanism 27 elevates the main frame 26 with respect to the base frame 25 . The lifting mechanism 27 employs a so-called X-link structure. The lifting mechanism 27 includes a first link 51, a second link 52, and a connecting rod 53 (receiving member).
A pair of the first link 51 and the second link 52 are provided with an interval 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 connecting pin 54 . It is

Four connecting rods 53 are provided. Each connecting rod 53 connects both ends of the pair of left and right first links 51 in the front-rear direction and both ends of the pair of left and right second links 52 in the front-rear direction.
Of the four connecting rods 53, the connecting rod 53 that connects the head-side H end of the first link 51 is rotatably connected to the first vertical member 28 and connects the head-side H end of the second link 52. A connecting rod 53 connecting the parts is rotatably connected to the second vertical member 33 . Of the four connecting rods 53, the connecting rod 53 that connects the end of the first link 51 on the foot side F is mounted on an upper guide portion 55 provided on the second vertical member 33, and is attached to the foot of the second link 52. A connecting rod 53 that connects the ends of side F is attached to a lower guide portion 56 provided on the first vertical member 28 . The upper guide portion 55 and the lower guide portion 56 each support the connecting rod 53 so as to be slidable along the front-rear direction.

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

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

The bottom drive mechanism 58 includes a first drive mechanism 58 a that rotates the back bottom 16 and a second drive mechanism 58 b that rotates the leg bottom 18 .
The first drive mechanism 58a is arranged in a portion of the support frame 12 located on the head side H along the front-rear direction. The first drive mechanism 58a rotates the first rotating member 43 upward by extending in the front-rear direction. The first drive mechanism 58a is provided between the second horizontal member 34 positioned closest to the head side H among the plurality of second horizontal members 34 and the first connecting portion 43b. The first drive mechanism 58a is connected to the second horizontal member 34 and the first connecting portion 43b via mounting members 60 projecting from the second horizontal member 34 and the first connecting portion 43b, respectively. The first drive mechanism 58a is rotatably connected to the mounting member 60. As shown in FIG.

The second drive mechanism 58b is arranged at the central portion of the support frame 12 in the front-rear direction. The second drive mechanism 58b rotates the second rotating member 46 upward by extending in the front-rear direction. The second drive mechanism 58b includes a second horizontal member 34 positioned closest to the head side H among the plurality of second horizontal members 34 provided on the foot-side frame 38, and a second connecting portion between the second rotating member 46 and the second horizontal member 34. 49 and are provided between. The second drive mechanism 58b is connected to the second horizontal member 34 and the second connecting portion 49 via mounting members 60 projecting from the second horizontal member 34 and the second connecting portion 49, respectively. The second drive mechanism 58b is rotatably connected to the mounting member 60. As shown in FIG.

The link drive mechanism 59 is arranged in a portion of the support frame 12 located on the foot side F along the front-rear direction. The link drive mechanism 59 rotates the first link 51 upward by extending in the front-rear direction. The link drive mechanism 59 is provided between the first link 51 and, among the plurality of connecting rods 53 , the connecting rod 53 that connects the foot-side F end of the first link 51 . The link drive mechanism 59 is connected to the connecting rod 53 via an attachment member 60 projecting from the connecting rod 53 . The link drive mechanism 59 is connected to the first link 51 via the conversion mechanism 61 . The conversion mechanism 61 converts the telescopic motion of the link drive mechanism 59 into the rotational motion of the first link 51 . The link drive mechanism 59 is rotatably connected to the mounting member 60 and the conversion mechanism 61 .

As shown in FIGS. 8 to 13 , the board 14 is fixed to the support frame 12 and stands above the bed surface 21 . A pair of front and rear boards 14 are provided, and stand up from both ends of the second vertical member 33 in the front-rear direction.
The controller 15 controls the drive mechanism 13 . The controller 15 is electrically connected to the drive mechanism 13 . A power cord C and an operation unit (not shown) are electrically connected to the control unit 15 . The control unit 15 is supplied with power from the outside through the power cord C, and receives instructions from the outside through the operation unit. The control unit 15 controls the drive mechanism 13 based on instructions from the operation unit 501 shown in FIG.

14 is a front view of the operation unit 501 applied to the bed device B. FIG. 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. Further, as shown in FIG. 14, the input unit 551 includes, in addition to the lowering switch 551a and the raising switch 551b, the leg lowering switch 551c, the leg raising switch 551d, the back lowering switch 551e, the back raising switch 551f, and the interlocking (back/leg switch). Lowering) switch 551g and interlocking (back/legs raising) switch 551h are provided.

The leg lowering switch 551c is a switch for moving the knee bottom 19 and the leg bottom 20 from the leg raised state in a direction horizontal to the floor surface. The leg-up switch 551d is operated when moving the knee bottom 19 and the leg bottom 20 to the leg-up state. The back-lowering switch 551e is operated when the back bottom 16 is moved from the back-up state to the horizontal direction to the floor surface. The back raising switch 551f is operated when the back bottom 16 is moved to the back raising state. The back/leg lowering switch 551g is operated when the back bottom 16 and the knee bottom 19 are interlocked and moved from the back raised state and the leg raised state to a state horizontal to the floor surface. The back/leg raising switch 551h is operated when moving the back bottom 16 and the knee bottom 19 in conjunction to move to the back raised state and the leg raised state.

It should be noted that the present invention is not limited to the above-described embodiments, and for example, the following modifications are conceivable.
(1) In the above embodiment, the speaker 552 emits a buzzing sound with a pattern as shown in FIG. 6, but the present invention is not limited to this. The speaker 552 may be configured to notify information by voice. If information is notified by voice, the operator can more easily recognize the height of the bed 200 from the floor.

(2) The first control unit 440 may cause the display unit 553 to display different patterns of notification information according to the height of the bed 200 from the floor. Also, the display unit 553 may have an LED light or the like, and may light up in different patterns according to the height of the bed 200 from the floor. In this case, the display section 553 can function as the notification section in the present invention.

(3) FIG. 7 is a functional block diagram of a modified example of the drive mechanism 300, the controller 400, and the operation unit 500. FIG. As shown in FIG. 7, the operation unit 500 further includes a vibration generator 554, and the first control unit 440 and the second control unit 550 operate the vibration generators in different patterns according to the height of the bed 200 from the floor. 554 may be oscillated. Equipping the operation unit 500 with the vibration generating unit 554 enables the operator to recognize the change in the height of the bed 200 from the floor by the vibration pattern of the operation unit 500 at hand. In this case, the vibration generator 554 can function as the notification unit of the present invention.
Furthermore, it is also possible to employ a configuration including at least one of the speaker 552, the display unit 553, and the vibration generating unit 554 as the notification unit.

(4) In the above embodiment, when the bed 200 is lowered, the buzzer sound is generated only when the height of the bed 200 from the floor is equal to or lower than the height of the temporary stop. However, the present invention is limited to this. not. A buzzer sound may be generated whenever the bed 200 is lowered. Also, when the bed 200 is raised, a buzzer may be generated.

(5) In the above embodiment, the environment detection unit 442 is an illuminance sensor, and the first control unit 440 changes the sound pressure of the buzzer based on the input from the environment detection unit 442. is not limited to this. The environment detection unit 442 may be a sound sensor such as a microphone. As the environment detection unit 442, it is possible to appropriately employ a detection unit that detects changes in the surrounding environment. For example, it is possible to adopt a clock as the environment detection unit 442 and change the volume pattern of the buzzer sound according to the time, such as lowering the sound pressure of the buzzer sound at night, for example.
Also, the first control unit 440 may change the frequency of the buzzer sound based on the signal from the environment detection unit 442 . In this case, for example, the frequency of the buzzer sound may be set switchably between 2.7 kHz and 1.2 kHz.

(6) Moreover, although the environment detection unit 442 is provided in the controller 400, the present invention is not limited to this. The environment detection unit 442 may be provided in the operation unit 500 . Moreover, the environment detection unit 442 may be provided in the support frame 100 .

(7) In the above embodiment, by changing the unit interval period t3 according to the height of the bed 200 from the floor, different patterns of buzzer sounds are generated from the speaker 552, but the present invention is limited to this. can't For example, by changing the sound pressure of the buzzer sound and the frequency of the buzzer sound according to the height of the bed 200 from the floor, different patterns of buzzer sounds may be emitted from the speaker 552 .

(8) In addition, in the above embodiment, the buzzer sounds simultaneously with the lowering motion of the bed 200, but the present invention is not limited to this. The buzzer may sound before the bed 200 is lowered. Assuming that the buzzer sound precedes the lowering motion, the buzzer sound is generated earlier than the motion of the bed 200, so that the operator can anticipate the motion of the bed 200 and operate it safely. Furthermore, a configuration may be adopted in which a buzzer sounds not only when the bed 200 is lowered, but also when the bed 200 is raised.

(9) Further, assuming that the rotation speed of the motor 330 is variable, the first control unit 440 reduces the rotation speed of the motor 330 when the height of the bed 200 from the floor becomes equal to or lower than the temporary stop height. It is also possible to slow down the descent speed of .

(10) In the above embodiment, the lower the height of the bed 200 from the floor, the shorter the unit interval period t3. However, the present invention is not limited to this. At least one of the sound generation period t1 and the sound silence period t2 may be shortened as the height of the bed 200 from the floor is lowered.

A bed device 120 lifting mechanism 200 bed 300 drive mechanism 400 controller 440 first control unit 441 storage unit 442 environment detection unit (detection unit)
500 Operation unit 550 Second control unit 551 Input unit 551a Down switch 551b Up switch 552 Speaker 553 Display unit 554 Vibration generator B Bed device 11 Bed 12 Support frame 13 Drive mechanism 16 Back bottom (movable bottom)
18 leg bottom (movable bottom)
23, 24 Rotating shaft 26 Main frame 33 Second vertical member (vertical member)
34 Second horizontal member (receiving member)
34a side surface 34b lower surface 43b first connecting portion (receiving member)
49 Second connecting portion (receiving member)
53 connecting rod (receiving member)
57 moving parts

Claims (5)

a bed comprising a plurality of bottoms including a back bottom, a waist bottom, a leg bottom and a knee bottom;
a plurality of first frames provided with a first mounting portion to which an option can be attached and supporting the plurality of bottoms;
a second frame supporting the plurality of first frames;
a drive mechanism for moving the bed;
a control unit connected to the drive mechanism;
a notification unit connected to the control unit;
with
When the bed is lowered, the notification unit emits a plurality of patterns of buzzer sounds with different sounding periods based on the height of the bed from the floor,
The electric bed, wherein the upper surface of the first mounting portion is lower than the upper surface of the first frame. The first frame includes a first rotating member for raising the back of the back bottom and a second rotating member for raising the knee of the knee bottom,
In plan view, the first rotating member, the connecting rod including the curved portion, and the second rotating member are arranged in this order from the back bottom side toward the leg bottom side. Motorized bed as described. The plurality of patterns include a first pattern including a first sounding period, a second pattern including a second sounding period shorter than the first sounding period and different from the first pattern, and a shorter sounding period than the second sounding period. 3. The electric bed according to claim 1 or 2, further comprising a third pattern including a third sounding period and different from any of the first and second patterns. When the bed descends and reaches a first height, the bed temporarily stops descending, and the notification unit emits a buzzer sound of the first pattern,
4. The electric bed according to claim 3, wherein said notification unit sequentially emits buzzer sounds of said second pattern and said third pattern while said bed descends again. 5. The motorized bed of claim 4, wherein the bed is lowered when the height of the bed from the floor is greater than the first height while a lowering switch is depressed.

Images