JPH0342891Y2 - - Google Patents

Description

[Detailed explanation of the invention] (a) Industrial application field This invention is a finger compression type electronic sphygmomanometer (finger sphygmomanometer) that measures blood pressure by compressing the fingers of the hand to prevent blood flow.
regarding the cuff.

(b) Conventional technology Generally, blood pressure monitors have a cuff wrapped around the upper arm.
Blood pressure was measured by ischemizing the upper arm, but in recent years there has been a finger sphygmomanometer that measures blood pressure by wrapping a cuff around the finger of the hand, for example, the second finger.

This finger sphygmomanometer wraps a cuff around the finger body, supplies pressurized air to the cuff to ischemize the finger body, and uses a photoelectric element to detect pulse waves while exhausting the pressurized air at a very low speed. It is configured to detect the systolic blood pressure and diastolic blood pressure from this pulse wave. Conventionally, various types of cuffs used in this type of finger sphygmomanometer have been devised, as shown in FIGS. 6 and 7. The cuff shown in FIG. 6 is constructed by adhering a cylindrical rubber air bladder b to the inner surface of a cylindrical support tube a. Also, the seventh
In the cuff shown in the figure, an air bag c is formed of a plurality of bag bodies d, and the bag bodies d are formed into a substantially trapezoidal shape and attached to a substrate e, and each bag body d is configured to allow free circulation. . This cuff has a photoelectric element f attached to a bag body d,
As shown in FIG. 8, an air bag c is mounted in a cylindrical shape with the bag body d inside, and the finger g is inserted into the air bag c.

(c) Problems that the invention aims to solve In the conventional cuff shown in Figure 6, the rubber air bladder b is bent at the tip and glued to the support tube a, so uniform products can be produced in large quantities. That was difficult.

Furthermore, in the conventional cuff shown in FIG. 7, when pressurized air is supplied, the inner surface of the bag d expands in an arc shape and presses the finger g, as shown in FIG. Therefore, a slight gap is created at the joint h between each bag body d, and the finger body g cannot be compressed uniformly over the entire circumference.
This was one of the causes of measurement error.

In view of the above, the purpose of this invention is to provide a cuff that can be mass-produced and that can evenly compress the entire finger.

(d) Means and operation for solving the problem This invention is based on a cuff of a finger blood pressure monitor that wraps around a finger body and presses the finger body, in which a flexible pressure contact piece is pressed against the finger body. is formed into a cylindrical shape so that the finger body can be inserted freely, while a flexible bag body is formed with a width smaller than the circumference of this pressure contact piece, and the inside of this bag body is configured as an air chamber. A plurality of bodies are connected in parallel to the outer circumferential surface of the pressure contact piece in the winding direction of the finger body, each air chamber is communicated with the other in a freely circulating manner, and the outer surface of each bag body is formed to be able to freely expand. The outer surface of each bag is in contact with the case, and when pressurized air is supplied to the air chamber, the outer surface of each bag expands and presses the case.
The entire pressing piece contracts in the centripetal direction due to the reaction of this pressing, and is configured to uniformly press the finger body over the entire circumference.

(E) Embodiments Hereinafter, embodiments of this invention will be described based on the drawings.

As shown in FIGS. 1 to 5, reference numeral 1 denotes a cuff of a finger sphygmomanometer 2, which is wrapped around a finger body 3, for example, the second finger of the hand, to compress and stench the second finger. It is.

This cuff 1 is a body case 4 of a blood pressure monitor 2.
It is housed in a cylindrical shape on the side thereof, and is composed of a pressure contact piece 5 and an air bag 6.

The pressing piece 5 is made of a flexible material and is formed into a rectangular flat plate, so that it can be deformed from a flat plate state to a cylindrical state in the longitudinal direction, and is configured to come into pressure contact with the finger body 3.

The air bag 6 is a bag body 7 made of a flexible material such as rubber.
A plurality of, for example eight, are connected. This bag body 7 is formed in the longitudinal direction of the finger body 3,
It is provided across both ends of the pressure contact piece 5, is formed to have a narrower width than the circumferential length of the pressure contact piece 5, and has an air chamber 8 inside. Each of the bags 7 has a trapezoidal cross-section, and includes a bottom surface 7a, sloped portions 7b on both sides, and a top portion 7c, and is attached to the top portion 7c and the outer surface of the pressure contact piece 5.

The bag body 7 is connected at the sides and continues in the winding direction of the finger body 3, and a small gap is formed between the upper end of each slope portion 7b and the top side portion 7c, and each air chamber is 8 is configured to be freely distributed. Further, the bottom surface portion 7a is configured to be able to bulge outward, and each bag body 7 is formed with a pressure contact piece 5 and an air bag 6 in a cylindrical shape on the outside, and is inserted into a cylindrical case 9 to form a main body case 4. It is set in. The bottom surface portion 7a of each bag body 7 is in contact with the inner surface of the cylindrical case 9, and the finger body 3 is inserted into the pressure contact piece 5.

Further, one of the finger bodies 7 is connected to a pipe 10 for supply and exhaust, two recesses 5a are formed in the pressure contact piece 5, and an element case 11 is provided in the recess 5a. This device case 11 houses photoelectric devices 12 such as light emitting diodes and photodiodes. Each photoelectric element 12 is arranged in an element case 1.
Light is emitted or enters through the first detection window 11a, and pulse waves are detected.

In addition to the cuff 1, the blood pressure monitor body case 4 includes a printed circuit board 13, a display board 14, a pressure pump 15,
A battery 16 and an air buffer 17 are housed, and a power switch 18, a start switch 19, etc. are also provided. The cuff 1 is connected to an air buffer 17 via a pipe 10, and pressurized air is supplied from a pressure pump 15. Further, the photoelectric element 12 is connected to a printed circuit board 13, and is configured to display the systolic blood pressure and diastolic blood pressure on the display board 14.

Next, the operation of the cuff 1 will be explained.

First, as shown in FIG. 1, the cuff 1 is made from a flat plate into a cylindrical shape with the air bag 6 facing outside, and is inserted into a case 9 and attached to the main case 4, as shown in FIG. In this state, the bottom surface 7a of each bag body 7 is in contact with the case 9, and the inside of the pressure contact piece 5 serves as an insertion hole for the finger body 3.

Subsequently, after connecting the pipe 10 to the air buffer 17 and inserting the finger body 3 into the pressure contact piece 5, the start switch 19 is operated to supply pressurized air from the pressure pump 15 to each air chamber 8. Due to this supply, the bottom surface 7a of each bag body 7 expands from a large arc shown in FIG. 4 to a small arc shown in FIG. 3. Apply pressure to prevent bleeding. At this time, the pressing piece 5 contracts over the entire circumference, and uniformly presses the finger body 3 over the entire circumference.

Thereafter, while the pressurized air is gradually exhausted at a slow speed, a pulse wave is detected by the photoelectric element 12, and the systolic blood pressure and diastolic blood pressure are measured from the pulse wave and displayed on the display board 14.

In this embodiment, the bag body 7 is formed into an inverted trapezoidal shape, but it may also be formed into a square or arc shape.

Furthermore, the finger blood pressure monitor 2 to which this cuff 1 is applied is as follows:
The present invention is not limited to the embodiments, and a manual pump or the like may be used.

(f) Effect of the invention As described above, according to the cuff of the finger blood pressure monitor of this invention, a plurality of bags are arranged in parallel on the outside of the pressure contact piece and attached to the case, and the finger is inserted into the pressure contact piece. While inserting the body, pressurized air is supplied to the bag body to contract the pressure-welding piece and press the finger body, so the pressure-welding piece contracts over the entire finger body, so the finger body is completely compressed. Since pressure is applied uniformly over the circumference, blood pressure can be measured accurately.

Moreover, since the bag is composed of a plurality of bags, it is easy to process the bag into a cylindrical shape, so mass production can be easily performed.

[Brief explanation of the drawing]

1 to 5 show an embodiment of this invention, in which FIG. 1 is a perspective view of the cuff in a flat state, FIG. 2 is a partially omitted perspective view of a finger sphygmomanometer, and FIG. The figure is a perspective view of the cuff in a cylindrical state, FIG. 4 is a front view of the cuff before pressurization, FIG. 5 is a front view of the same after pressurization, and FIGS. 6 to 9 are: 6 is a perspective view of a cuff, FIG. 7 is a perspective view of another cuff in a flat state, and FIG. 8 is a front view of the cuff in FIG. 7 before pressurization in a cylindrical state. FIG. 9 is a front view of the same after pressurization. 1: Cuff, 2: Finger blood pressure monitor, 3: Finger body, 4: Main body case, 5: Pressure contact piece, 6: Air bag, 7: Bag body,
8: Air chamber, 9: Cylindrical case.

Claims (1)

[Claims for Utility Model Registration] In a cuff for a finger blood pressure monitor that wraps around a finger body and presses the finger body, a flexible pressure contact piece that is pressed against the finger body is formed in a cylindrical shape, and the finger body is pressed against the finger body. is configured so that it can be inserted freely,
A flexible bag body is formed with a width smaller than the circumferential length of the pressure-welding piece, and an air chamber is formed inside the bag body, and a plurality of flexible bags are formed on the outer peripheral surface of the pressure-welding piece in the winding direction of the finger body. The air chambers are connected in parallel, and the air chambers are communicated with each other so that they can freely circulate, and the outer surface of each bag body is formed to be able to expand freely, and the outer surface of each bag body is in contact with the case, and the bag body and the pressure contact piece are provided. A cuff for a finger blood pressure monitor, characterized in that pressurized air is supplied to the air chamber.