JP2003325590A - Motor-driven bed - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To relieve mental burden and danger on a user of a motor-driven bed, and also to relieve burden on a carer in working. <P>SOLUTION: An operation switch 6 to be operated for adjusting the position of the motor-driven bed includes: a back elevating position adjustment switch 12; a height position adjustment switch 13; a knee position adjustment switch 11; and an adjustment position storage fixed position switch 9. The bed includes: a control part 4; a motor rotation detecting encoder 8 being a motor rotary position detecting means; a minimum/maximum position detecting limit switch 3 being an adjustment position operation limit means; a memory 5 being a motor rotary position storage means; and a reference clock 7 being a switch operation time detecting means. A desired adjustment position is stored, and the adjustment position storage fixed position switch 9 is operated, so that the bed is normally moved to and kept in the desired storage position. Besides, a function is provided to control the operation time of the operation switch, and to change-over validity/invalidity in receiving the operation switch. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a hospital, a welfare facility,
The present invention relates to an electric bed used at home.

[0002]

2. Description of the Related Art Conventionally, electric beds have been able to adjust their back height, height and knee position by operating the operation switches, and operate the back height, height and knee position one by one to the desired adjustment position. Adjustment is performed by continuing to operate the switch.

[0003]

[Problems to be Solved by the Invention] An electric bed adjusts its back height, height and knee position (hereinafter referred to as position adjustment) at the time of sleeping, eating, caring by a caregiver, standing up from bed such as bathing, etc. )is necessary.

In the conventional electric bed, it is difficult to hold the electric bed at the same position every time because the position is adjusted by the operation of the operation switch by the bed user or the caregiver.

For this reason, for example, when the position of the back-raised position is adjusted by the caregiver to have a meal, the cared person may experience discomfort such as pressure on the abdomen due to a slight difference in posture. It was In addition, when the bed user (care recipient) tries to get out of bed alone for bathing etc., the user adjusts the height position while operating the operation switch. There was a danger of.

In a hospital or welfare facility, when it is determined that the bed user cannot safely operate the electric bed due to the medical condition, the electric bed is operated so that the care bed cannot be operated except by the caregiver. The bed user's erroneous operation was avoided by means such as pulling out the power cord from the outlet and operating a key that disables the operation of the operation switch (such as one that locks and unlocks by inserting a pen tip into a small hole).

For this reason, when the caregiver adjusts the position of the electric bed at the time of care, it is necessary to insert / remove the power cord and lock / unlock the operation switch every time.
Further, when there are a plurality of bed users, there is a problem in that it is not easy for a caregiver to operate these bed operations while operating them to use positions suitable for the respective bed users.

[0008] Therefore, an object of the present invention is to reduce the mental burden and danger of the bed user by operating the same in the desired position such as the eating posture and standing up of the electric bed user.

Further, a key lock is provided to prevent erroneous operation of the operation switch of the electric bed user or the caregiver to reduce the risk, and to disable the operation of the power switch and the operation switch of the caregiver performed by the caregiver. The purpose is to eliminate the cancellation and reduce the work load on the caregiver.

[0010]

[Means for Solving the Problems] The above object is to provide an electric bed having a function of adjusting the back-raising, height, and knee-raising position by operating an operation switch to control a motor.
A position adjusting means for storing the position and a means for storing the adjusted position are provided, and by operating one operation switch, the operation is performed up to the stored position and the stored position is held. To be achieved.

Further, it is achieved by providing means for switching the acceptance of the operation switch between valid and invalid by operating the operation switch in a predetermined pattern.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the overall structure of the present invention. In FIG. 1, the motor control unit 4 receives an operation signal input from the operation switch unit 6, outputs a motor control command to the motor drive unit 1, and the motor drive unit 1 outputs the motor 2 (2a, 2
b, 2c) are energized respectively to operate the respective motors 2.

The motor 2 includes a back raising 2a, a height 2b,
It is composed of three knees 2c, and when adjusting the back raising position, the motor 2a is driven and controlled.

The motor control unit 4 receives the pulse signal output from the motor rotation detection encoder 8 and controls the motor rotation speed and position. Motor rotation detection encoder 8
Also, it is composed of three pieces for raising the back 8a, height 8b, and knees 8c.

The back raising, height, and knee raising adjustment position ranges are limited to the shortest and longest positions, and the shortest and longest position detection limit switches 3 installed in the back raising, height, and knee raising motors 2 provide the shortest.・ Detect the longest position. The motor control unit 4 receives this detection signal, and the control unit 4 raises its back, height,
The shortest / longest position of the knee raising adjustment position range is judged, and the control of the motor 2 is stopped.

The limit switch 3 includes a back raising shortest position detecting 3a, a longest position detecting 3b, a height shortest position detecting 3c, a longest position detecting 3d, and a knee raising shortest position detecting 3.
e, and 3f for detecting the longest position.

Further, the motor control unit 4 has a back raising / height /
It has a function of communicating with the memory 5 (EEPROM) for storing the knee position, and the operation speed of the control unit 4 depends on the reference clock 7 (oscillator).

FIG. 2 shows the overall structure of the operation switch 6.

The operation switch 6 is provided with a back-raising adjustment switch 12, a height-adjusting switch 13, and a knee-raising adjustment switch 11. For example, when the back-raising is adjusted in the shortest position direction, the switches are used. When operating 12b and adjusting it in the longest direction, by continuing to operate the switch 12a, the motor 2a rotates and the back raising part moves, and the position can be adjusted. Further, by stopping the operation of the switch 12, the movement of the back raising portion is stopped, and the back raising portion is held at that position. Similarly, the height and knee-raising position can also be set with the switches 13 and 11
The position is adjusted by continuing to operate.

Next, the back raising / height / knee raising adjusting position memory according to the present invention and the operation method up to the memory position will be described.
The back raising adjustment position will be described as an example.

In order to store the desired back-raising adjustment position, first, the operation switch 12b is continuously operated to move it to the shortest position. The control unit 4 reads the signal from the operation switch 12b, rotates the motor 2a in the shortest position direction,
The detection signal from the back-raising shortest position detection limit switch 3a is received to determine the shortest position.

Then, when the fixed position 1 switch 9b and the back raising switch 12a of the operation switch 6 are continuously operated, the control section 4 continues to read the signals of the fixed position 1 switch 9b and the back raising switch 12a, and the back position is raised. Operate the raising.
After moving to the desired adjustment position, the fixed position 1 switch 9b and the switch 12a are stopped. At this time, the control unit 4 always reads the pulse signal output from the back-raising motor rotation detection encoder 8a and grasps the motor rotation speed from the shortest position. At the same time, the control unit 4 writes the motor rotation speed (rotation frequency) data of the desired adjustment position in the memory 5 and stores the desired adjustment position.

The control unit 4 constantly reads the pulse signal of the motor rotation detection encoder 8a to grasp the current back-raising position. The same applies to height and knee lift.

Further, as a storage position adjustment erroneous operation prevention, a function of not starting a desired adjusted position storage operation is provided unless the fixed position 1 switch 9a and the back raising switch 12a are continuously operated for a predetermined time. The control unit 4 can realize time management by the reference clock 7.

As the operation method up to the storage position, by operating only the fixed position 1 switch 9a for a fixed time,
The operation to the stored desired adjustment position is started. Since the control unit 4 always knows the back-raising, height, and knee-raising position, when the signal for starting the operation of the fixed position 1 switch 9a is continuously received for a fixed time, the stored adjusted position data of the memory 5 is read and The position of the motor 2a is calculated by comparing with the position, and the motor 2a is driven to the desired adjustment position and held at the desired adjustment position. At the same time, the height and knees are similarly moved to the desired adjustment position and held at the desired adjustment position.

When the operation is started, even if the operation of the operation switch is stopped, the operation is automatically performed up to the storage position. As a safety function, 11a, 11b of the operation switch 6 during this operation,
When any switch 12a, 12b, 13a, 13b is operated, the operation is immediately stopped.

The operation switch 6 has an LED 10, which is lit by the control unit 4 when normally energized, blinks slowly when the desired storage position is being adjusted, and is automatically operated from a certain position to the desired storage position. Flashes at high speed to notify the operator of the operating status of the electric bed.

The fixed position 2 switch 9a is also the same as the fixed position 1 switch 9b, and in this example, it is possible to store two different desired adjusted positions.

In addition, even if the power is cut off at the time of power failure or when the power cord is unplugged from the outlet, the memory 5
Holds the memory location data, the memory location data will not be changed or deleted. When the power is cut off, the control unit 4 blinks the LED 10 at high speed and at low speed to notify the operator that the power has been cut off. At the same time, the control unit 4 has a safety function of not accepting the fixed position switch 9 even if the operator operates the fixed position switch 9 based on the data in the internal register to determine that the power is cut off.

When such a power interruption occurs, the switches 11, 12, and 13 of the operation switch 6 are operated to operate the back raising, height, and knee raising portions to the shortest positions, respectively. The control unit 4 detects the signals of the shortest position detection limit switches 3a, 3c, and 3e for the back raising, height, and knee raising portions, respectively, to grasp the back raising, height, and current knee raising position. After this operation is carried out, the signal reception of the fixed position switch 9 is started.

The present invention can also be implemented in a backup system using a battery or the like, and an absolute position detection function motor (absolute encoder) system.

Next, another embodiment of the function of switching the acceptance of the operation switch between valid and invalid will be described.

Switch 1 for adjusting the back of operation switch 6
2a, 12b and the fixed position 1 switch 9b are simultaneously operated for a fixed time, the control unit 4 reads the switch signal, and the operation switches 9, 11, 12,
Disable the reception of 13. At the same time, the control unit 4
D10 is turned on and turned on at a high speed to notify the operator that the operation switch reception is disabled. When canceling the invalid state, the back raising adjustment switch 12a,
When the switch 12b and the fixed position 1 switch are simultaneously operated for a predetermined time, the control unit 4 reads the switch signal and validates the acceptance of the operation switches 9, 11, 12, and 13.

With the above construction, the mental burden and danger of the bed user and the work burden of the caregiver are reduced.

[0035]

[Effects of the Invention] By providing back-up / height / knee-raising adjustment position storage means and operation switch acceptance / non-effective switching means, the mental burden on the bed user and the risk are reduced, and the work of the caregiver. The burden can be reduced.

[Brief description of drawings]

FIG. 1 is an overall configuration of electric components of an electric bed.

FIG. 2 is an overall configuration of an operation switch.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Motor drive part, 2a ... Back raising motor, 2b ... Height motor, 2c ... Knee raising motor, 3a ... Back raising shortest position detection limit switch, 3b ... Back raising longest position detection limit switch, 3c … Shortest position detection limit switch for height, 3d… Longest position detection limit switch for height, 3e… Shortest position detection limit switch for knee lift, 3
f ... Longest position detection limit switch for knee raising, 4 ... Control unit, 5 ... Memory, 6 ... Operation switch, 7 ... Reference clock, 8a ... Back raising motor rotation detection encoder, 8b ...
Motor rotation detection encoder for height, 8c ... Motor rotation detection encoder for knee lift, 9a ... Fixed position 2 switch, 9b
... fixed position 1 switch, 10 ... LED, 11a ... longest position direction operation adjustment switch for knees, 11b ... shortest position direction operation adjustment switch for knees, 12a ... longest position direction operation adjustment switch for back raising, 12b ... shortest direction for raising back Position / direction operation adjustment switch, 13a ... Longest position / direction operation adjustment switch for height, 13b ... Shortest position / direction operation adjustment switch for height.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Takashi Suzuki             800 Tomita, Ohira-cho, Shimotsuga-gun, Tochigi             Hitachi Home and Life Solutions             Tochigi Office F-term (reference) 4C040 AA05 BB06 DD04 DD05 EE05                       EE08 GG14

Claims (2)

[Claims] 1. A means for performing position adjustment for storing a position in an electric bed having a function of adjusting a back-raising, height, and knee-raising position by operating an operation switch to control a motor, And means for storing the adjusted position,
An electric bed that operates to a memorized position and holds it at the memorized position by operating one operating switch. 2. The electric bed according to claim 1, further comprising means for operating the operation switch in a predetermined pattern so as to enable / disable the acceptance of the operation switch.