JPS61238230A - Digital hemomanometer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application This invention relates to a finger sphygmomanometer, and particularly to a finger sphygmomanometer that can detect when a finger is inserted through a cuff.

(b) Conventional technology Finger sphygmomanometers compress the artery of, for example, the index finger with a cuff, detect pulse wave components generated during the pressure reduction process, and measure blood pressure from changes in the amplitude of the pulse waves. Some conventional finger sphygmomanometers use a water-type cuff, but this cuff itself is exposed and has a roughly cylindrical shape, so the cuff may tear if used for a long period of time. It was unbearable for practical use. Therefore, the inventor of this application:
He developed a finger sphygmomanometer that uses a pneumatic cuff like the sphygmomanometer on his arm, and houses the cuff in a case, making it convenient to carry around.He has already filed a separate application for this device.

(c) Problems to be Solved by the Invention The finger sphygmomanometer of the earlier application is of the air pressurization type, and pressurizes the area around the finger with a cuff. It goes without saying that the finger is much thinner than the arm, and for this reason the cuff used in this finger blood pressure monitor also has a larger capacity than the cuff of a conventional arm-type blood pressure monitor. It is extremely small and has a limited capacity even with an air buffer. If you pressurize an air system that includes such a small-capacity cuff without inserting your finger,
There is a risk that the cuff will quickly inflate and break, or that excessive pressure will be applied to the pressure sensor, destroying it.

Therefore, it is preferable not to apply pressure when a finger is not inserted.

In view of the above, an object of the present invention is to provide a borrowed blood pressure monitor that can prevent pressurization in a state where a finger is not inserted.

(d) Means and Effects for Solving Problems The borrowed blood pressure monitor of the present invention is equipped with a finger detector that detects when a finger is inserted into the cuff, and the output of this finger detector is used to permit pressurization of the cuff. It is used as a signal.

In this borrowed sphygmomanometer, even if an attempt is made to input a pressurization instruction without a finger inserted through the cuff, the finger detector will not output a pressurization permission signal, so pressurization will not be possible.

(E) Examples The present invention will be explained in more detail with reference to Examples below.

FIG. 5 is a perspective view of a cuff storage part of a borrowed blood pressure monitor showing an embodiment of the present invention. In this embodiment of the blood pressure monitor, the cuff storage part is formed separately from the main body, and FIG.
Only the cuff storage part 1 is shown.

The cuff storage section 1 is composed of a rectangular parallelepiped case 2, a cylindrical cuff 3 provided within the case 2, and an index stand 4. Cuff 3 is the finger insertion front end surface 2 of case 2.
a, and an index stand 4 is arranged on the back side, so that air pressure is supplied to the cuff 3 from the main body (not shown) through the air pressure inlet 5 and the inside of the overlay 4. It has become.

Furthermore, a pulse wave sensor 8 is provided on the inner wall of the cuff 3 to optically detect pulse wave components of the artery when a finger is inserted and the artery is compressed.

The above-mentioned cuff 3 is composed of eight air chambers 3a, 3b, . . . , ah that communicate with each other. It is also possible to use an air chamber formed by an air chamber which is rolled into a cylindrical shape.

The index stand 4 is composed of a flat central part 4a and side parts 4b and 4c whose upper surfaces are inclined with respect to the central part 4a,
It is provided on the bottom surface of the case 2 on the back side of the cuff 34, and the height of the central portion 4a is set to be the same height as the lower surface of the cylinder of the cuff 3. Further, a top piece 9 is provided in the central portion 4a. Since the index stand 4 including this upper piece 9 is a characteristic part of this embodiment of the blood pressure monitor, its more specific structure will be described later.

The case 2 of the cuff storage section 1 has a see-through window 6 formed at the back of the top surface so that the interior can be viewed from above, and an arrow mark 7 is marked on the front of the top surface of the case 2. The finger is inserted in the direction of this arrow.

Next, the specific structure of the index stand 4 will be explained with reference to FIGS. 1 to 4.

An L-shaped communication path 11 from the air pressure inlet 5 to the air pressure outlet 10 is formed inside the index stand 4, and a hole opening on the top surface of the index stand 4 is formed at the corner of the L-shape of this communication path 11. 12 is formed, and a microswitch 13 is provided deeper than this hole 12. One end 9a of the above-mentioned upper piece 9 is fixed to the front upper surface of the central part 4a of the index stand 4, and the other contact piece 9b is configured to cover the hole 12 and the microswitch 13.

If a finger is not inserted into the cuff accommodating portion 1 configured as described above, as shown in FIG.
b is not in contact with the button 13a of the microswitch 13, but when a finger is inserted into the cuff 3, the tip of the extended finger pushes the contact piece 9b downward, as shown in FIG.
The contact piece 9b turns on the microswitch 13.

FIG. 6 shows a cuff storage section 21 showing another embodiment of the present invention.
FIG. In this embodiment, the cuff 2 of the case 22 is
A light-emitting element 24 and a light-receiving element 2 are installed on the inner wall farther from the rear end of 3.
5 is provided, and the light from the light emitting element 24 is received by the light receiving element 25. When a finger is inserted into the cuff 23, the tip of the finger blocks light, so that no light is input to the light receiving element 25.

This allows the finger to be detected.

A schematic block diagram of a dental blood pressure monitor employing the above-described finger detector is shown in FIG. In the figure, a pulse wave sensor 32 is attached to the cuff 3, and the pulse wave signal detected by the pulse wave sensor 32 is sent to an MPU (microprocessor unit) 35 via an amplifier 33 and an A/D converter 34. It is becoming more and more popular. Further, a finger detector 36 is provided near the cuff 31, and a signal indicating whether detection is detected by the finger detector 36 is also taken into the MPU 35.

Further, the cuff 31 is connected to a pressure sensor 37 and an air buffer 38, and is also equivalently connected to a slow exhaust valve 39 and a rapid exhaust valve 40.
The air buffer 38 and the cuff 31 are connected to each other through the air buffer 38 and the cuff 31. Further, the cuff pressure detected by the pressure sensor 37 is amplified by an amplifier 43, and is then input to the MPU 35 via the A/D converter 34.

Components other than the cuff 31, pulse wave sensor 32, and finger detector 36 described above are housed in the main body.

When a measurement start key (not shown) is operated, the MPU 35 turns on the pressure pump 41 to pressurize the cuff 31 on the condition that a finger detection signal is manually input from the finger detector 36.
Blood pressure is determined by applying a predetermined algorithm to the output of the pressure sensor 37 and the output of the pulse wave sensor 32 during the depressurization process after pressurization to a predetermined value.

The determined blood pressure values, that is, the systolic blood pressure (SYS) and the diastolic blood pressure (DIA) are output from the MPU 35 and displayed on the display 44.

If the measurement start key is operated without a finger inserted into the cuff 31, the MPU 35 will not receive a finger detection signal from the finger detector 36, so in this case, it will send an ON command to the pressure pump 41. Do not allow pressurization. Then, an instruction to insert a finger is given to the display 44, and a notification sound is emitted from the buzzer 45.

(Effect of the invention) According to this invention, when the finger detector does not detect finger insertion, pressurization is not allowed, so there is no pressurization when the top rice is inserted, and the cuff and pressure Damage to the sensor can be prevented.

[Brief explanation of the drawing]

1 is a plan view of an index stand of a finger sphygmomanometer according to an embodiment of the present invention, FIG. 2 is a front view thereof, and FIG. 3 is a line m--
FIG. 4 is a partial cross-sectional view showing a state in which one piece of the top of the same mounting table is pushed downward by finger insertion. FIG. FIG. 6 is a perspective view of a cuff storage section showing another embodiment of the present invention, and FIG. 7 is a block diagram of a dental blood pressure monitor to which the present invention is applied. 3/31: Cuff, 11: 1 piece on top, 12: Hole,
13: microswitch, 24: light emitting element,
25: Light receiving element, 35: MPU, 36-Finger detector. Patent applicant Tateishi Electric Co., Ltd. Agent
Patent Attorney Shin Nakamura Shigeru 23: η7 Figure 7

Claims (3)

[Claims] (1) A finger sphygmomanometer in which a substantially cylindrical cuff for compressing the finger is provided inside the case, the finger is inserted through the cuff, and the cuff is pressurized and depressurized to measure blood pressure. A finger sphygmomanometer comprising a finger detector for detecting whether the cuff has been pressed, and an output of the finger detector is used as a signal for permission to pressurize the cuff. (2) The finger detector according to claim 1, wherein the finger detector comprises an operating piece on which a finger is placed when the finger is inserted into the cuff, and a microswitch that is turned on by this operating piece. Sphygmomanometer for use. (3) The finger detector detects that when a finger is inserted into the cuff,
The finger sphygmomanometer according to claim 1, which is a photoelectric detector that is subject to changes in photoelectric characteristics.