JPH0450004Y2 - - 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 measure blood pressure by wrapping a cuff around the upper arm to prevent blood flow from the upper arm.
There is a finger sphygmomanometer that measures blood pressure by wrapping a cuff around the finger of the hand, for example, the second finger. This finger blood pressure monitor is
A cuff is wrapped around the finger body, and pressurized air is supplied to the cuff to ischemize the finger body. While this pressurized air is slowly exhausted, a photoelectric element detects the pulse wave. From this pulse wave, the systolic blood pressure and the lowest configured to detect blood pressure.

As shown in FIGS. 5 and 6, the cuff of this finger sphygmomanometer has a plurality of trapezoidal flexible bags b arranged in parallel on a bottom plate a, and an air chamber in which the insides communicate with each other. When the bottom plate a is made into a cylindrical shape, the side surfaces c of each bag body b are in contact with each other, and each surface d is configured to form a polygonal finger insertion hole e.

Moreover, what is shown in FIGS. 7 and 8 is a bag b
The side surface e of the bag is approximately U between the side surface e of the adjacent bag body b and the side surface e of the adjacent bag body b.
It is formed in a letter shape, and when it is made into a cylindrical shape, a gap f is formed between the side surfaces e.

(c) Problems to be solved by the invention In the cuff described above, when pressurized air is supplied, the surface d of the bag body b presses against the finger body. However, in the devices shown in FIGS. 5 and 6, the finger bodies have various thicknesses, so if the fingers are thin, the surface d of the bag body b expands in an arc shape and presses the finger body.
(See Figure 6). That is, of the internal pressure of bag b, side c
Those acting on the surface d cancel each other out, and those acting on the surface d deform the bag body b in the radial direction. Therefore, if the finger body is thick, the internal pressure will directly act on it, but if it is thin, the gap between the finger body and the finger body will be absorbed by the amount of expansion of the bag surface d. Therefore, the compression force of the finger body and the expansion force of the bag body b become the internal pressure, and the pressure within the cuff does not directly correspond to the blood pressure value, making accurate measurement difficult.

In addition, in the case shown in FIGS. 7 and 8, when the finger body is thin, the gap f becomes smaller (see FIG. 8),
Although the expansion force of the bag b does not act, only the upper ends of both side surfaces e are in contact to form the gap f, so each bag b is easily deformed. That is, when the finger body is inserted, the finger body tends to be eccentric with respect to the center of the cuff, causing a problem in that the compressive force applied to the finger body becomes uneven.

In view of the above, this invention provides a cuff for a finger sphygmomanometer that prevents expansion force and deformation by forming a contact surface and a gap between the side surfaces of adjacent bag bodies. It is something.

(d) Means and action for solving the problems This invention consists of a soft fabricated material that can be expanded by pressurization and has a hard and flexible bottom plate and a plurality of bags each having a substantially trapezoidal cross section. The bag is integrally formed at the edge, each bag is formed in the longitudinal direction of the finger body to be narrower than the circumference of the finger body, and the inside thereof is configured as an air chamber, and the plurality of bags are The air chambers are arranged in parallel in the winding direction of the finger body, and the air chambers communicate with each other in a freely flowing manner, and the adjacent side surfaces of each bag body are formed by an inclined flat part and a concave part, and the inclined The flat part is continuously formed on the finger body side surface of the bag body, while the concave part is continuously formed on this sloped flat part and also on the adjacent concave part, so that the sloped part of the adjacent bag body The flat portions are in contact with each other, and a gap is formed at the concave portion.

When the cuff is pressurized with a finger attached to the cuff, the bag body of the cuff tends to expand due to air pressure. At this time, since the sloped flat parts are in contact with the sloped flat parts of the adjacent bags, the surface of the bag moves only in the radial direction at the bottom of the gap,
Eventually, it will put pressure on your fingers.

(e) Embodiment An embodiment of this invention will be described below based on the drawings.

As shown in FIGS. 1 to 4, reference numeral 1 denotes a cuff of a finger blood pressure monitor 2, which wraps around a finger body (not shown), for example, the second finger of the hand, and presses the second finger. be.

The cuff 1 is connected to the side of the main body 3 of the blood pressure monitor 2 via a pipe 4 and is housed in a case 5. Then, the cuff 1 is attached to the bottom plate 6 with a pressure bag 7.
The bottom plate 6 is formed of a slightly hard flexible member, and is configured to be deformable from a flat plate state to an arcuate state.

The pressurized bag 7 is constructed by connecting a plurality of, for example, nine, bags 8 made of a flexible member such as rubber. This bag body 8 is formed in the longitudinal direction of the finger body, is formed narrower than the circumference of the finger body, and has an air chamber 9 inside. The bag body 8 is formed to have a trapezoidal cross-section, has a flat surface portion 8a as the top side, and has side surfaces 8b connected downward from both ends of the surface portion 8a. This side surface 8b consists of a flat portion 8c that slopes slightly outward as it goes downward, and a concave portion 8d that is formed in an almost bow shape. 8d is connected to the flat part 8c at the upper end, and the concave part 8
The lower end of d is connected to the concave surface portion 8d of the adjacent bag body 8. The surface portion 8a serves as a surface in contact with the finger body, while the lower end of the concave portion 8d is formed so as to be able to come into contact with and separate from the bottom plate 6, so that each air chamber 9 can freely circulate.

The bag body 8 is continuous at the lower end of the concave surface portion 8d, and continues in the winding direction of the finger body. When the bottom plate 6 is wound into a cylindrical shape, as shown in FIG. 2, the adjacent surface portions 8a are continuous to form a polygonal finger insertion hole. Further, as shown in FIG. 3, the flat portion 8c of the side surface 8 is in full contact with the adjacent flat portion 8c, while the adjacent concave portions 8d are triangular to form a gap 10. The pressure of pressurized air acts on the lower side of this gap 10, that is, the lower part of the concave surface portion 8d, and the surface portion 8a moves in the centripetal direction (inward in FIG. 2).

Although not shown, the cuff 1 is equipped with a photoelectric element such as a light emitting diode or a photodiode, and is configured to detect a pulse wave. On the other hand, the blood pressure monitor main body 3 is provided with a display section 11 and various switches 12, as well as a pressure pump and other internal components.
It is equipped with a CPU, etc., and is configured to detect and display blood pressure values.

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

First, as shown in FIG. 1, the cuff 1 is wound from a flat plate to a cylindrical shape as shown in FIG.
Connect to.

In this state, the bottom plate 6 has a cylindrical shape, the pressurized bag 7 has a polygonal shape with each bag body 8, and the surface portion 8a
are continuous, while adjacent flat portions 8c are in contact with each other, and concave portions 8d form a gap 10.

Thereafter, when the finger body is inserted into the pressurized bag 7 and the switch 12 is operated, pressurized air is supplied to each air chamber 9, and the surface portion 8a presses the finger body.
At this time, the pressure P also acts on the lower side of the gap 10 in the centripetal direction, so if the finger body is thin, the surface portion 8a moves inward and presses the finger body. Therefore, the expansion force of the bag body 8 does not act, and at the same time, the flat part 8c contacts the bag body 8 to uniformly press the finger body without deforming the bag body 8.

Thereafter, while exhausting the pressurized air at a slow speed, a pulse wave is detected and the blood pressure value is displayed on the display unit 11.

The finger blood pressure monitor to which the cuff of this invention is applied is
It is not limited to the examples.

(f) Effect of the invention As described above, according to the cuff of the finger blood pressure monitor of this invention, the side surfaces of the bag body are formed by a flat part and a concave part, and the flat parts of adjacent bag bodies are brought into contact with each other. Since a gap is formed in the concave surface part, the gap is pressed in the centripetal direction and the bag surface moves, so even in the case of a thin finger, no expansion force is generated and accurate measurement can be performed.

Further, since the flat parts are in contact with each other, the bag body is not deformed, and the finger body is not eccentric with respect to the center of the cuff, so that the finger body can be compressed uniformly over the entire circumference.

[Brief explanation of the drawing]

1 to 4 show an embodiment of this invention, in which FIG. 1 is a perspective view of a flat cuff, FIG. 2 is a front view of a cylindrical cuff, and FIG. Figure 2A
FIG. 4 is a perspective view of a finger sphygmomanometer, FIGS. 5 to 8 show conventional examples, FIG. 5 is a perspective view of a flat cuff, and FIG. 6 is a perspective view of a finger sphygmomanometer. FIG. 7 is a perspective view of another flat cuff, and FIG. 8 is a front view of the cuff. 1... Cuff, 2... Finger blood pressure monitor, 6... Bottom plate,
7... Pressure bag, 8... Bag body, 8a... Surface portion, 8
b...Side surface, 8c...Flat part, 8d...Concave part,
9...Air chamber.

Claims (1)

[Scope of Claim for Utility Model Registration] A cuff of a finger blood pressure monitor that is wrapped around a finger body and presses the finger body has a hard flexible bottom plate and a plurality of bag bodies that are approximately trapezoidal in cross section. A soft pressurized bag that can be inflated by pressure is integrally formed at the edge thereof, and each bag is formed in the longitudinal direction of the finger body to have a narrower width than the circumference of the finger body, so that the inside is filled with air. The plurality of air chambers are connected in parallel in the winding direction of the finger, and the air chambers are in communication with each other in a freely circulating manner, and the adjacent side surfaces of each of the air chambers are inclined. The slanted flat part is formed continuously on the finger body side surface of the bag,
The bag is characterized in that a concave part is formed continuously on this inclined flat part and also in an adjacent concave part, and the inclined flat parts of adjacent bags are in contact with each other, and a gap is formed in the concave part. finger blood pressure cuff.