JPH053294B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Background of the Invention (1) Technical Field The present invention relates to an electronic blood pressure monitor with a clock that displays measurement date and time information. (2) Prior art and its problems In order to display the date and time information at the time of blood pressure measurement in a conventional electronic blood pressure monitor with a clock, for example, the time was always displayed on the display regardless of whether the lid was opened or closed. consumption was not negligible. Therefore, for example, it may be possible to display time information on the display only when the lid is opened, but power is not supplied to the control unit even when the switch related to the start of blood pressure measurement is turned on. Therefore, even from this point of view, it could not be said that it was sufficient, and the degree of power consumption could not be ignored. Purpose of the Invention The present invention has been made in view of the above-mentioned prior art, and its purpose is to display the time while in a standby state until an instruction regarding blood pressure measurement is given.
Moreover, it is an object of the present invention to provide an electronic blood pressure monitor with a clock that requires as little power as possible to be supplied to the main body of the device during that time. Configuration of the Invention An electronic blood pressure monitor with a clock according to the present invention that achieves the above object has the following configuration. That is, a cover that protects the main body of the electronic blood pressure monitor, a timekeeping unit that is constantly supplied with power and that measures the time and generates a pulse signal of a predetermined level having a predetermined length of time at each predetermined period, and a plurality of devices related to blood pressure measurement. a group of switches for giving instructions on the type of switch; a control section that is connected to the pulse signal output terminal of the timekeeping section and the output terminal of each of the switch groups and that controls and executes processing related to blood pressure measurement; and the cover is opened. a display unit to which drive power is supplied when the input signal is input when the cover is open and a signal of the predetermined level is input from at least one of the clock unit and the switch group; and power supply means for supplying drive power to the control section for a period during which the signal is at the predetermined level, and the control section further comprises: when the drive power is supplied to itself by the power supply means, the control section a signal supply means for supplying a signal of a predetermined level to the power supply means; a determination means for determining which output signal from the timekeeping section and the switch group is used to supply power to the power supply means; and a lid determination means. a first processing means that reads the time from the timer and updates the time displayed on the display when the means determines that power has been supplied based on a pulse signal from the timer; and the switch group. a second processing means that performs the corresponding process when it is determined that power has been supplied by one of the power supply means; and when the processing by the first and second processing means is completed, the and signal stopping means for stopping output of a signal at a predetermined level. DETAILED DESCRIPTION AND OPERATIONS OF THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Further, in the present embodiment, an example in which the present invention is applied to, for example, an electronic blood pressure monitor using a battery as a power source will be described. FIG. 1 is a block diagram of blood pressure measurement in this embodiment. In the figure, solid lines represent power supply lines, and broken lines represent control lines, respectively. Reference numeral 1 denotes a battery that serves as a power source for each circuit in the entire block diagram and peripheral devices. 2a
is a switch that determines whether there is a cover etc. on the electronic blood pressure monitor, and when the cover is removed, it turns “ON”.
In this state, power is supplied to the power stabilizing circuit 7, switches 2b and 2c, and the LCD driver 8a and LCD 8b, which will be described later. The switch 2a is located at the rear of the main body of the electronic blood pressure monitor, for example, as shown in FIG. 3a. Third
Figure b shows a state in which the head 2a' of the switch 2a is pushed into the main body 31 by the cover 30 via the button 32, and at this time the switch 2a is in the "OFF" state. Further, FIG. 3c shows the state in which the lid part 30 is removed from the main body 31, and since there is nothing to press the button 32 into at this time, the button 32 will protrude outside due to the restoring force of the head 2a' of the switch 2a. “ON”
become a state. Further, since the switch 2a only needs to determine whether or not the lid 30 is in the open state, the shapes and positions of the lid 30 and the switch 2a are not limited to those shown in this figure. The part may be connected to the main body by a hinge. Further, 2b and 2c are a printer 13 and a switch for starting blood pressure measurement, respectively. 3 is a CPU that controls each circuit and each peripheral device, and 4 is a ROM in which an operating program of a flowchart shown in FIG. 2, which will be described later, is stored. 5 is an RTC which is constantly supplied with power and has the same function as a clock and generates a negative pulse signal having a predetermined time width every minute, for example. Further, 6 is a gate that operates when the switch 2a is turned on. 7 is
This is a power supply stabilizing circuit that supplies stable power to the CPU 3 and various peripheral devices, and is designed to supply power to the various circuits when the signal from the gate 6 is "1". Reference numeral 8a denotes a UCD driver and an LCD for driving a display LCD, and power is supplied to the UCD driver and LCD when the switch 2a is turned "ON", that is, when the cover is removed. 9 stores various measurement value data
It is a RAM, and like the RTC 5 mentioned above, power is always supplied and data is backed up. Reference numeral 10 denotes an A/D converter that converts the Kontokoff sound from the cuff of the blood pressure monitor and analog quantities sent from the pressure sensor into digital quantities and outputs the digital quantities to the CPU 3. Further, 11 is an analog circuit consisting of an amplifier that amplifies the pulse sound from the arm cuff. 12a
-12d are power supply switches that control the power supply to the printer 13, pump 14, A/D converter 10, and analog circuit 11 under the control of the CPU 3. Also, this block diagram shows RTC
5. Control lines of switches 2b and 2c and CPU
The output terminal PO of switch 2a is pulled up to Vdd so that it becomes high level, that is, "1" when switch 2a turns "ON". In the case of the electronic sphygmomanometer configured as described above, there is no need to supply power to the pump 14 when, for example, the blood pressure measurement is finished and the results are printed, and conversely, when processing such as printing, the analog circuit is not required. 11
Also, there is no need to drive or operate the A/D converter 10 or the pump 14, which is a peripheral device. Considering each processing stage in this way, it can be seen that power can be supplied to necessary devices and circuits according to the stage. Table 1 provides a rough summary of these various processing steps. In addition, in Table 1, "X" indicates a state where power is not supplied, and "△" indicates a state where power is sometimes supplied.
“○” indicates a state in which it is constantly supplied.

【table】

[Table] In backup mode, power is supplied to the clock RTC5 and the backup RAM. At this time, the RTC 5 is configured to give an interrupt signal to the CPU 3 every minute, which is the smallest digit of the clock, and this signal is also connected to the gate 6. On the other hand, power is supplied to the RAM 9 in order to hold, ie, back up, data measured in the past. In this mode, other power supplies, such as the CPU 3, may be in the "OFF" state. Next, the time display mode will be explained. The time display mode means a state in which the cover of the electronic blood pressure monitor is removed, and at this time the time is displayed on the LCD 8b, which is the display section of the electronic blood pressure monitor. In this mode, switch 2a is in the “ON” state, and first
Power is supplied to the LCD 8b, LCD driver 8a, gate 6, and switches 2b and 2c, respectively.
At this time, the output of gate 6 is "0", so
No power supply voltage is output from the power supply stabilization circuit 7,
Naturally, power is not being supplied to CPU3. but,
As can be seen from this block diagram, the RTC 5 is operating at this time and outputs a negative pulse signal having a predetermined time length to the CUP 3 and the gate 6 every minute. Upon receiving this pulse signal, the gate 6 sets the level of the output terminal to "1" for at least a time corresponding to the width of the pulse signal (negative level period). Therefore, the power supply stabilizing circuit 7 is configured to control the CPU 3 and the CPU (not shown) at least during the period when the output terminal of the gate 6 is set to "1".
Supplies power to the ICs required for operation 3. CPU
3, when the power is turned on, the CPU 3 immediately sets its output PO to ``0'' while the output signal of the RTC 5 is at the ``0'' level to prevent the power from being turned off, and reads the current time from the RTC 5. , the data is written to the LCD driver 8a, latched, and displayed on the LCD 8b. When the above processing is completed, CPU3 sets the output terminal PO to “1” state.
Turn off the power of CPU3 itself. Furthermore, even when the CPU 3 is powered off, the LUD driver 8a data is latched and continues to be displayed on the LCD 8b. By performing this operation every minute, in the clock display mode, the power is turned on to the CPU 3 for a minute period approximately every minute, and its power consumption becomes extremely small. Therefore, in this mode
CPU3 is marked “△”, RTC5 and RAM
9, the LCD 8b, the LCD driver 8a, and the power supply stabilization circuit 7 only need to be supplied with power. Next, the blood pressure measurement mode will be explained. By operating the switch 2c, power is turned on to the CPU 3 in the same way as in the clock display mode. When the power is turned on, the CPU 3 first sets the output terminal PO to "0" to prevent the power to the CPU 3 from being cut off, and performs the following processing. First, a signal is sent to the power supply switches 12b to 12d to turn on the power to the pump 14, A/D converter 10, and analog circuit 11, respectively. Next, the systolic blood pressure value, diastolic blood pressure value, and pulse rate related to blood pressure measurement are measured respectively and the LCD driver 8a is driven.
The measurement results are displayed on the LCD 8b and stored in the RAM 9. Next, it is determined whether switch 2b has been pressed for a predetermined period of time, and if it has not been pressed, CPU 3
turns off each power supply switch 12a to 12d, then sets the output terminal PO to "1" to turn off the power to the CPU 3 and each peripheral circuit. In addition, in the print mode, in order to output the previously measured value data stored in the RAM 9, the currently measured blood pressure value, pulse rate, etc. to the printer, when it is detected that the switch 2b has been pressed, First, set the output terminal PO to “0” to prevent the power to the CPU3 from being cut off. Next, the power supply switch 12a is turned "ON" to turn on the power to the printer 13. Thereafter, the data stored in RAM 9 is output to the printer. The processing in each mode has been described above, and the flowchart in FIG. 2 shows this as a series of processing operations. This operation will be explained below. Furthermore, in the following explanation, each mode is as described above. In step S1, it is determined whether or not the electronic blood pressure monitor has a cover, and if the cover is present, the electronic blood pressure monitor operates in accordance with the backup mode described above in step S2. Also, if there is no cover, step S3
The time display mode is entered by the signal generated every minute from the RTC 5, and the time is displayed on the LCD 8b. At this time, it is determined whether the switch 2b is "ON" or not (step S4). If it is "ON", the process moves to step S5 and enters the print mode, where the previous measurement data is read from the RAM 9 and output to the printer 13. Next, switch 2 at step S6.
It is determined whether c is "ON" or not, and when it is "OFF", the process returns to step S1. When the switch 2c is "ON", the process moves to step S7 and enters the blood pressure measurement mode, where the systolic blood pressure, diastolic blood pressure, pulse rate, etc. are measured, and the measured data is displayed on the UCD 8b via the LCD driver 8a, along with the time. Store it in RAM9 (step S8).
Next, in step S9, the state of switch 2c is detected, and if it is "ON", the subsequent processing is executed again in step S7, and if it is "OFF", the state of switch 2c is
In S10, the state of switch 2b is detected. When the switch 2b is "ON", the measurement data measured in step S7 is output to the printer 13, and when it is "OFF", the operation of detecting the states of the switches 2b and 2c is repeated for a predetermined period of time in step S12. , 2c are "OFF", the process returns to step S1. As described above, according to this embodiment, only by opening the lid, power is supplied only to the display section. In that state, that is, in the standby state for blood pressure measurement or printout, power is supplied to the control unit only for a short period of time every minute, or only when an instruction to start blood pressure measurement or printout is given. Ru. When the control unit determines that power has been supplied to itself by the pulse signal that occurs every minute, it simply updates the display time and restarts the power supply until the next pulse signal is generated. Becomes cut off. Furthermore, if it is determined that power has been supplied to itself due to an instruction to start blood pressure measurement or to print out, it performs the corresponding process and cuts off power supply to itself again. As described above, in this embodiment, the time is displayed when in the waiting state for inputting various instructions related to blood pressure measurement, but power is not always supplied during the waiting state. Therefore, power consumption can be extremely reduced. Furthermore, power is automatically supplied to each peripheral device, which has the effect of saving time and effort. Further, in this embodiment, an example in which a battery is used as a power source has been described, but the present invention is not limited to this. For example, when applied to a household AC power source, the power consumption can be extremely reduced. Furthermore, in this embodiment, the pulse signal every minute
Although it is assumed that power is supplied to the CPU, for example, if the measurement information is fine with an accuracy of one hour, the pulse signal may be generated every hour, or it may be set to something else. . Effects of the Invention As explained above, according to the present invention, the time can be displayed in the standby state until an instruction related to blood pressure measurement is given, and the power supplied to the main body of the device can be minimized during that time. It will be done.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an electronic blood pressure monitor according to this embodiment, and FIG. 2 is an operational flowchart according to this embodiment. FIG. 3a is a cross-sectional view of the blood pressure monitor of this embodiment,
Figures 3b and 3c are diagrams showing the relationship between the lid and the switch. In the figure, 1...Battery, 2a-2c...Switch,
3...CPU, 4...ROM, 5...RTC, 6...
Gate, 7...Power stabilization circuit, 8a...LCD
Driver, 8b...LCD, 9...RAM, 10...
...A/D converter, 11...Analog circuit, 12a
~12d...Power supply switch, 13...Printer, 14...Pump, 30...Lid, 31...Sphygmomanometer body.

Claims (1)

[Scope of Claims] 1. A cover that protects the main body of an electronic blood pressure monitor; A timekeeping section that is constantly supplied with power, keeps time, and generates a pulse signal of a predetermined level having a predetermined length of time at each predetermined cycle; a group of switches that give a plurality of types of instructions related to blood pressure measurement; a control section that is connected to the pulse signal output terminal of the previous timer and the output terminal of each of the switch groups and that controls and executes processing related to blood pressure measurement; a display unit to which driving power is supplied when the cover is released; and when the cover is released and a signal of the predetermined level is input from at least one of the timer unit and the switch group; , power supply means for supplying drive power to the control section at least for a period during which the input signal is at the predetermined level, and the control section further includes: drive power supplied to itself by the power supply means. a signal supply means for supplying a signal of the predetermined level to the power supply means; and a judgment for determining which output signal from the clock unit and the switch group is used to supply power to itself. and first processing means for reading the time from the timer and updating the time displayed on the display when the determining means determines that power has been supplied based on the pulse signal from the timer. and a second processing means that performs a corresponding process when it is determined that power has been supplied by one of the switch groups, and when the processing by the first and second processing means is completed, the An electronic blood pressure monitor with a clock, comprising: signal stopping means for stopping output of the signal at the predetermined level to the power supply means.