JP2012040146A - Operation mechanism of motorized bed - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a conventional problem that, for instance, using a motorized bed, when a condition of a patient suddenly changed into anemia during dialysis, it is required that a posture of the patient must be quickly brought into a low position in the back side and a high position in the foot side, so-called shock posture (high foot posture), so as to quickly recover the blood flow in the upper body, but conventionally it cannot be performed to quickly bring the patient into the shock posture.SOLUTION: In the motorized bed configured to enable adjustment of the backside and the foot side of a person on the bed to high positions, an operation mechanism of the motorized bed wherein an operation switch device 9 including a usual switch part 11a and an emergency switch part 11b set thereon to give a lift drive instruction of the lift drive mechanism via a control means which gives a descending motion instruction to the lift drive mechanism of a back bottom 6a and an ascending motion instruction to the lift drive mechanism of a knee bottom 6c when the emergency switch part ON is proposed.

Description

  The present invention is an operation of an electric bed in which the back bottom and the knee bottom are configured to be rotatable up and down by a lifting drive mechanism, and the back side and the foot side of a patient or the like on the bed can be appropriately adjusted to a high position. It relates to the mechanism.

  As an electric bed for hospitals / facility or home use, the back bottom and knee bottom can be rotated up and down, and the back and foot side of the person on the bed can be adjusted to a high position. Beds are widely used.

  For example, Patent Document 1 describes an electric bed having such a function. In this electric bed, the bottom is divided into a back bottom, a waist bottom, a knee bottom, and a foot bottom, each of which is connected in a turnable manner, and the back bottom and the knee bottom are connected to the bed frame. It is supported so as to be rotatable, and is configured to be movable up and down by an elevating drive mechanism that includes an electric actuator constituted by an electric motor and a screw shaft type telescopic rod. Further, one end side of the support stay is rotatably connected to the lower side of the other end side of the foot bottom, and the other end side of the support stay is rotatably supported by the bed frame, thereby The other end of can be supported above the bed frame. In Patent Document 1, the other end of the support stay can be selectively engaged with and supported by a plurality of engaging portions on the bed frame side to adjust the height of the other end of the foot bottom. It is said.

  In addition, the electric bed which can support the other end side of the foot bottom above the bed frame is well known as described in Patent Document 2 and Patent Document 3.

  In such an electric bed, by pressing an operation button arranged on an operation switch device such as a hand switch, the corresponding switch is turned on, and a lifting operation command is issued to the lifting drive mechanism via the control means, thereby making the back bottom The height of each of the knee bottom and the knee bottom can be adjusted as appropriate, and thus a posture (posture) suitable for the patient on the bed can be taken.

  At this time, from the viewpoint of safety, the control means operates the lifting drive mechanism only when the operation button of the operation switch device is pressed, and when two or more operation buttons are pressed simultaneously, Control is performed so as not to operate it as an erroneous operation.

  By the way, when such a motorized bed is used, for example, when the patient suddenly changes into anemia while performing artificial dialysis or the like, the blood flow is quickly returned to the upper body. Therefore, it is necessary to operate the bottom as soon as possible to change the patient's posture to the so-called shock position (foot side high position) in which the back side is in the low position and the foot side is in the high position. The shock posture is a posture suitable for patients with anemia or hemorrhagic shock by raising the foot side by 15 cm to 30 cm in the supine position. In the electric bed, the foot bottom is at a high position and is substantially horizontal. As a result, not only is the patient's lower leg supported substantially horizontally, but the foot bottom is maintained in a tilted state with the foot side at the lower position, so that the patient's lower leg can be tilted downward as appropriate. It also includes the state that is in progress.

  However, even if the patient's posture is to be changed to the shock posture as soon as possible, in the raising / lowering operation of the back bottom and the knee bottom, if two or more operation buttons are pressed at the same time as described above, it is regarded as an erroneous operation. Therefore, the lowering motion of the back bottom and the raising motion of the knee bottom cannot be performed simultaneously.

  Therefore, for example, when the back bottom is in the raised position and at the same time the knee bottom is in the lowered position, the operator first presses the operation button corresponding to the lowering of one bottom, for example, the back bottom, to the lower limit. After lowering, it was necessary to keep pressing the operation button corresponding to the rise of the knee bottom to raise it to the upper limit.

JP 63-125213 A JP 2007-117182 A JP 2009-207627 A

  The problem to be solved by the present invention is that a conventional electric bed cannot quickly be in a shock position.

  In order to solve the above-described problems, in the present invention, the back bottom and the knee bottom are configured to be rotatable up and down by an elevating drive mechanism, and the back side and the foot side of the person on the bed can be adjusted to a high position. In the electric bed, the operation switch device that issues a lifting operation command to the lifting drive mechanism via the control means comprises a normal operation switch section and an emergency operation switch section, and the control means includes the emergency switch There is proposed an electric bed operating mechanism that is configured to issue a lowering operation command to the back bottom elevating drive mechanism and an elevating operation command to the knee bottom elevating drive mechanism when the operation switch unit is ON.

  According to the present invention, in the above-described operation mechanism, the control means proposes an operation mechanism for an electric bed configured to increase the speed of the lift drive mechanism in response to an operation command when the emergency operation switch unit is ON.

  Furthermore, the present invention proposes an operation mechanism for an electric bed in which the emergency operation switch unit is configured to be visually distinguishable from the normal operation switch unit.

  In the operation mechanism of the electric bed according to the present invention, when the emergency operation switch portion of the operation switch device is turned ON, the control means sends a lowering operation command to the back bottom lifting drive mechanism regardless of the current bottom state. In addition to issuing a lifting motion command to the knee bottom lifting drive mechanism to cause the back bottom lowering motion and the knee bottom lifting motion to be performed in parallel, the patient's position on the bottom can be shortened in one operation. Can be a shock position (foot side high position) with the dorsal side in the low position and the foot side in the high position.

  In such a raising / lowering operation of the bottom in an emergency, it is possible to further shorten the time until the shock body position is achieved by operating each raising / lowering drive mechanism at a higher speed.

  If the emergency operation switch unit is configured to be visually distinguishable from the normal operation switch unit, for example, by changing the color or the like, the operator can reliably perform the operation without being lost in an emergency.

FIG. 1 is a side view showing a configuration of an electric bed to which an operation mechanism according to the present invention is applied, together with a bottom rising limit. FIG. 2 is a side view showing an operation of shifting from a normal use state to a use state corresponding to a shock position in an emergency in the electric bed to which the operation mechanism according to the present invention is applied. FIG. 3 is a side view showing a use state corresponding to a shock body position in the electric bed to which the operation mechanism according to the present invention is applied. FIG. 4 is a front view showing an example of the configuration of the front side of the operation switch device constituting the operation mechanism according to the present invention. FIG. 5 is a front view showing another example of the configuration on the front side of the operation switch device constituting the operation mechanism according to the present invention. 6A and 6B show an example of the configuration of the side surface of the operation switch device constituting the operation mechanism according to the present invention. FIG. 6A is a left side view and FIG. 6B is a right side view. FIG. 7 is a flowchart showing the flow of the control operation in the operation mechanism according to the present invention.

Next, embodiments of the present invention will be described with reference to the accompanying drawings.
1 to 3, reference numeral 1 generally indicates an electric bed according to the present invention. The electric bed 1 is provided by a lifting link 4 above a carriage frame portion 3 provided with casters 2. The bed frame 5 is supported so as to be movable up and down, and the bed frame 5 supports a bottom divided into a back bottom 6a, a waist bottom 6b, a knee bottom 6c, and a foot bottom 6d. The waist bottom 6b is fixed to the bed frame 5, and the back bottom 6a and the knee bottom 6c are rotatably connected to the head and foot ends. A foot bottom 6d is rotatably connected to the end of the knee bottom 6c, and one end side of the support stay 7 is rotatably connected to the lower side thereof. The other end side of the support stay 7 is supported by an engaging member (not shown) provided on the bed frame 5, and the other end side of the foot bottom 6 d is configured to be supported above the bed frame 5.

  Further, push-up arms 8a and 8b, which are only partially illustrated, are provided below the back bottom 6a and the knee bottom 6c, respectively, and electric actuators that are components of the lifting drive mechanism are provided at their ends. The tip of (not shown) is connected, and the back bottom 6a and the knee bottom 6c are configured to move up and down through the push-up arms 8a and 8b by the forward and backward movement of the electric actuator. Further, the bed frame 5 supporting the bottom is configured to be movable up and down with respect to the carriage frame portion 3 by a similar lifting drive mechanism.

  Reference numeral 9 denotes an example of an operation switch device related to the lifting operation of the bottom, and this operation switch device 9 is configured as a hand switch. The operation switch device 9 issues a lifting operation command to the lifting drive mechanisms of the back bottom 6a and the knee bottom 6c via a control means (not shown). In addition, as the operation switch device in the present invention, a nurse control panel or the like installed on the footboard side or the like is used in addition to such a hand switch so that the nurse can perform the lifting operation of the bottom conveniently. be able to.

  4 and 5 are enlarged views of the operation switch device 9 schematically shown in FIG. Reference numeral 10 denotes a switch device body. A switch portion 11 and a display portion 12 are configured on the front side of the switch device body 10, and the switch portion 11 includes a normal operation switch portion 11a and an emergency operation switch portion 11b. It is divided into.

  The normal operation switch portion 11a is provided with three pairs of left and right operation buttons 13L and 13R in the vertical direction. The respective operation buttons 13L and 13R are distinguished from each other by adding subscripts a to c from the top to the bottom in the drawing.

  Between the left and right operation buttons 13L and 13R that form a pair, pictograms 14a, 14b, and 14c that symbolically indicate the up and down movement of the bottom when the corresponding operation buttons 13L and 13R are pressed are provided. The portions of the pictograms 14a, 14b, and 14c are configured as light-transmitting windows, and the operation display is performed by transmitting light from an LED (not shown) provided in the switch device body 10. Yes.

  Here, the bottom lifting operation by pressing the operation buttons 13L and 13R constituting the normal operation switch portion 11a will be described. First, the uppermost operation buttons 13La and 13Ra in the drawing move the back bottom 6a up and down. The next operation buttons 13Lb and 13Rb move the knee bottom 6c up and down. The lowermost operation buttons 13Lc and 13Rc adjust the bed height by moving the bed frame 5 supporting the bottom up and down in parallel. As is clear from the display in the figure, in each operation button 13, the left side in the figure with the subscript L lowers the bottom, and the right side in the figure with the subscript R raises the bottom. It is to perform the operation.

  On the other hand, in the emergency operation switch section 11b, one operation button 16 is arranged on one side, in this case, on the left side in the frame display 15, and on the right side, the bottom up / down operation by the operation button 16 is symbolic. The pictogram 17 displayed on the screen is provided together with the operation explanation 18.

  Here, in this embodiment, the operation button 16 is different from the operation buttons 13L and 13R of the normal operation switch section 11a in order to clearly indicate that the emergency operation switch section 11b is for emergency use. A color, for example, red, is configured so as to be visually identifiable. A mode in which the colors of the operation buttons 16 are changed in this way is indicated by hatching in the drawing.

  On the other hand, in some cases, unlike the above-described embodiment, instead of the operation button 16, as shown in FIG. 5, the inside of the frame display 15 for displaying the emergency operation switch unit 11b is the normal operation switch unit 11a. It can also be visually identifiable in a different color, for example red. As in FIG. 4, a mode in which the inside of the frame display 15 of the emergency operation switch unit 11 b has a color different from that of the normal operation switch unit 11 a is indicated by hatching in the drawing.

  The following briefly describes other components of the operation switch device 9 illustrated as an embodiment. Reference numeral 19 is a power indicator lamp, 20a, 20b, and 20c are indicator lamps for angle limitation, elevation speed switching, and presence / absence of operation sound, respectively, and 21 is a pictogram that symbolically displays operations related to these indicator lights. Reference numeral 20d denotes a battery remaining amount display unit. On the other hand, in FIG. 6 showing the side of the operation switch device 9, reference numeral 22a denotes an operation prohibition setting switch unit for setting the operation prohibition of the lifting operation by the respective switch units 11a and 11b on the front side, and reference numeral 22b cancels the setting. The reference numeral 22c is an operation switch section for the lifting speed, 22d is an operation switch section for switching presence / absence of operation sound, and numeral 23 is a switch rail 10 (not shown) mounted on a side rail (not shown). It is a hook for supporting.

With the above configuration, an example of the flow of the control operation in the operation mechanism of the present invention will be described with reference to the flowchart of FIG.
First, in step S1, whether or not the normal operation switch unit 11a or the emergency operation switch unit 11b is ON, that is, whether any one of the operation buttons 13L, 13R, and 16 of the operation switch device 9 is pressed. If it is determined that no operation button has been pressed, the process returns to step S1 to continue monitoring whether the operation button has been pressed.

  On the other hand, if any one of the operation buttons is pressed, the process proceeds to step S2 to determine whether or not the emergency operation switch unit 11b is ON, that is, the operation button determined to be pressed in step S1. Is determined whether or not the operation button 16 is provided on the emergency operation switch unit 11b.

  When the pressed operation button is not the operation button 16 provided in the emergency operation switch section 11b but any one of the operation buttons 13L and 13R of the normal operation switch section 11a, the normal lifting operation in step S3 Enter mode.

  In step S3 in the normal lifting / lowering operation mode, as described in the explanation of the operation buttons 13L and 13R, the back bottom 6a is raised or lowered, and the knee bottom 6c is raised or lowered according to the pressed operation button. In addition, the entire bottom is raised or lowered. In FIG. 1, two-dot chain lines indicating the back bottom 6a and the knee bottom 6c indicate their upper limit positions.

  At this time, as described above, from the viewpoint of safety, the control means performs control so that the elevation drive mechanism is operated only when the operation buttons 13L and 13R are pressed, and further, any two or more When the operation buttons 13L and 13R are pressed at the same time, control is performed so that the operation buttons 13L and 13R are not operated due to an erroneous operation.

  On the other hand, when it determines with the operation button 16 provided in the emergency operation switch part 11b having been pressed in step S2, it transfers to step S4 of an emergency raising / lowering operation mode.

  In step S4, the control means issues a lowering operation command to the raising / lowering driving mechanism of the back bottom 6a, and issues an raising operation command to the raising / lowering driving mechanism of the knee bottom 6c, regardless of the current bottom state. The downward movement of 6a and the upward movement of the knee bottom 6c are performed in parallel. For example, when the current bottom state is the solid line state of FIG. 2, the back bottom 6a is lowered as indicated by the solid line arrow, and the knee bottom 6c is raised as indicated by the solid line arrow.

  As described above, in the present invention, the patient's posture on the bottom can be changed in a short time by only one operation of pressing the operation button 16 of the emergency operation switch section 11b, and the shock position with the back side being low and the foot side being high. (High on the foot side). If the push operation of the operation button 16 is stopped before the back bottom 6a reaches the lower limit or before the knee bottom 6c reaches the upper limit, the raising / lowering operations of the back bottom 6a and the knee bottom 6c are stopped at that time. By such an operation, the positions of the back bottom 6a and the knee bottom 6c in the shock body position can be adjusted.

  In the normal lifting operation mode in step S3 or the emergency lifting operation mode in step S4, when any operation button is not pressed, the process proceeds to step S1 to monitor the operation of the operation button. continue.

  In the control flow described above, whether or not any two or more operation buttons are pressed at the same time is determined in step S3 of the normal lifting operation mode. As an example of the above, it is possible to perform the process prior to step S1, and to move to step S1 only when any one of the operation buttons is pressed.

  That is, in this case, the operation button 16 of the emergency operation switch unit 11b can be included in an operation button that considers simultaneous pressing as an erroneous operation to perform control.

  However, the position of the operation button 16 of the emergency operation switch unit 11b is far from the position of the other operation buttons 13L and 13R of the normal operation switch unit 11a, and it is difficult to press simultaneously. The emergency operation switch unit 11b or its operation button 16 can be clearly identified visually from the normal operation switch unit 11a or its operation buttons 13L and 13R. From this point of view, it can be excluded from the determination of simultaneous pressing as in the control flow described above.

  In the present invention, as described above, the emergency operation switch portion 11b is turned ON, so that the lowering action of the back bottom 6a and the raising action of the knee bottom 6c are performed in parallel. In time, the patient's position on the bottom can be changed to the shock position (the foot side high position) where the dorsal side is low and the foot side is high. In the ascending operation of the knee bottom 6c, as shown in () in FIG. 7, the time required to reach the shock body position can be further shortened by increasing the speed of each elevating drive mechanism.

  Furthermore, if the emergency operation switch unit 11b is configured to be visually distinguishable from the normal operation switch unit 11a, for example, by changing the color, the operator can reliably operate in an emergency without hesitation. Can do.

DESCRIPTION OF SYMBOLS 1 Electric bed 2 Caster 3 Carriage frame part 4 Lifting link 5 Bed frame 6 Bottom 6a Back bottom 6b Waist bottom 6c Knee bottom 6d Foot bottom 7 Support stay 8a, 8b Push-up arm 9 Operation switch device (hand switch)
DESCRIPTION OF SYMBOLS 10 Switch body 11 Switch part 11a Normal operation switch part 11b Emergency operation switch part 12 Display part 13L, 13R (subscript a-c) Operation button 14a, 14b, 14c Pictogram 15 Frame display 16 Operation button 17 Pictogram 18 Explanation of operation 19 Power indicator lamps 20a, 20b, 20c Indicator lamp 20d Battery level indicator 21 Pictograms 22a, 22b, 22c, 22d Operation switch 23 Hook

Claims (3)

In an electric bed in which the back bottom and the knee bottom are configured to be rotatable up and down by a lift drive mechanism so that the back side and the foot side of the person on the bed can be adjusted to a high position, the lifting and lowering is performed via a control means. The operation switch device that issues an elevation operation command to the drive mechanism includes a normal operation switch unit and an emergency operation switch unit, and the control means drives the back bottom to move up and down when the emergency operation switch unit is ON. An operation mechanism for an electric bed, characterized in that a lowering operation command is issued to the mechanism and an ascending operation command is issued to the knee bottom lifting drive mechanism. 2. The operation mechanism for an electric bed according to claim 1, wherein the control means is configured to increase the speed of the elevating drive mechanism in response to an operation command when the emergency operation switch unit is ON. The operation mechanism for an electric bed according to claim 1, wherein the emergency operation switch unit is configured to be visually distinguishable from the normal operation switch unit.

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