JPH0213570B2 - - Google Patents

Description

[Detailed description of the invention] 【Technical field】

The present invention relates to a cuff band for a blood pressure monitor that is used by being wrapped around the arm of a person being examined.

[Background technology]

A curved plate 1' made of an elastic material and formed into a curved shape is built into the cuff band, and the elasticity of the curved plate 1' allows the cuff band to be fitted onto the arm and temporarily secured. Conventionally, devices that allow one person to easily attach a cuff band to the arm have been used. However, in the case of this conventional cuff band, the shape of the curved plate 1' does not fit all people, such as those with thick arms and those with thin arms. As shown in curved plate 1'
The disadvantage was that the edge of the arm dug into the arm, causing pain to the arm. The reason for this is that the width B' and wall thickness t' of the curved plate 1' are constant throughout as shown in Fig. 10, and the rigidity EI is constant in each cross section of the curved plate 1'. It is. When the curved plate 1' is expanded, a bending moment is generated in the curved plate 1', but the distribution of the bending moment at this time is 0 at both ends of the curved plate 1' in the bending direction, and is maximum at the center. There is.
The curvature κ of the displacement curve from the material axis when subjected to bending moment M is determined by κ = M/EI (EI: stiffness), so when curved plate 1' receives external force,
The bending deformation is large at the center of the curved plate 1', and almost no bending deformation occurs at both ends. Therefore, when the curved plate 1' is expanded, the curved plate 1' opens wide at the center as shown in Fig. 11. The curved plate 1' does not spread out neatly into a circular shape, but remains largely curved at both ends, and in the case of people with thick arms, the ends of the curved plate 1' dig into their arms.

[Purpose of the invention]

The present invention was made in view of the above-mentioned technical background, and its purpose is to make the curved plate spread uniformly when force is applied, so that the cuff can be applied to both thin and thick arms. The purpose is to ensure that the obi fits smoothly.

[Disclosure of the invention]

The cuff band of the blood pressure monitor of the present invention has a built-in curved plate 1 formed into a curved shape by a flexible member and can be wrapped around the arm. It is characterized by being formed so that the rigidity gradually increases from both ends in the bending direction toward the center, and the distribution of the bending moment that occurs when force is applied and the curved plate 1
Since the distribution of rigidity is approximately proportional to the rigidity distribution, even when the curved plate 1 is expanded, the deformation is approximately uniform over the entire length in the curved direction. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The curved plate 1 is made of a flexible synthetic resin material such as polypropylene, and has a curved shape like a cylinder cut along the generatrix. This curved plate 1 is formed so that the wall thickness gradually increases from both ends in the curve direction toward the center, and the stiffness gradually increases.The wall thickness and stiffness are maximum at the center. ing. That is, as shown in FIG. 1, the thickness of each part satisfies t ₁ >t ₂ >t ₃ . Therefore, the rigidity (or second moment of area) is maximum at the center where the largest bending moment occurs when external force is applied, and the curvature of the entire curved plate 1 can be kept almost constant, as shown in Figure 2. The curvature of the curved plate 1 along the curved direction is the same whether it is worn on a thin arm and is not spread out much as shown in Figure 3, or when it is tightly spread out on a thick arm as shown in Figure 3. is almost uniform, and in each case it spreads out in a beautiful arc shape. The above-mentioned curved plate 1 is built into a cuff band A as shown in FIG. 4 to be wrapped around the arm. That is, as shown in FIG. 5, the outer peripheral surface of the curved plate 1 is covered with an outer cloth 2, and the ischemic cuff 3, which is inflated by pumping air, is arranged along the inner peripheral surface of the curved plate 1. is,
The inner peripheral surface of the ischemic cuff 3 is covered with an inner cloth 4, and a Korotkoff sound sensor 6 is housed in a sensor pocket 5 provided between the ischemic cuff 3 and the inner cloth 4. Furthermore, a plug 11 for connecting to the blood pressure monitor main body 10 is connected to the air pipe 8 connected to the pump nozzle 7 provided on the ischemic cuff 3 and the sensor cord 9 connected to the Korotkoff sound sensor 6.
is provided. Therefore, when wrapping the cuff band A around the arm, the elasticity of the curved plate 1 is first used to temporarily wrap it around the arm, and then the cuff band A is attached to the end of the outer fabric 2 and the edge of the inner fabric 4. The cuff band A is fastened to the arm by the planar fasteners 12, 12. The one shown in FIG. 6 is another example of the present invention, in which a plurality of coupling hooks 13 are integrally formed on the outer peripheral surface of the curved plate 1, and the coupling hooks 13 are passed through the hook insertion holes 14 of the outer cloth 2. The connecting hook 13 is made to protrude from the outer surface of the cuff band A, and when the connecting hook 13 is engaged with the blood pressure monitor main body 10, the cuff band A is attached as shown in FIG.
The sphygmomanometer main body 10 can be attached to the sphygmomanometer body 10. Note that when air is supplied to the ischemic cuff 3, the pressure of the air stretches the outer cloth 2, causing the hook insertion hole 14 to expand.
In order to prevent the outer cloth 2 from being pulled and torn by the hook 13, a reinforcing cloth 15 is laminated on the inner surface of the outer cloth 2. What is shown in FIG. 8 is still another example of the present invention,
The width of the curved plate 1 in the direction orthogonal to the curved direction gradually increases from both ends in the curved direction toward the center, and as shown in FIG _.
＜B ₂ . In this embodiment, the rigidity (secondary moment of area) is maximized at the center by changing the width. What is shown in FIG. 9 is still another example of the present invention,
In the curved plate 1 shown in FIG. 8, a slit groove 16 is further cut in the center in the width direction, and the width of the slit groove 16 is made wider on the open end side, so that B ₁ < B ₂ . ing.

【Effect of the invention】

As described above, the flexible curved plate built into the cuff band is formed so that its rigidity gradually increases from both ends in the bending direction toward the center. This can be used to temporarily secure the cuff band around the arm, making it easier to attach the cuff band to the arm.Moreover, the ratio of the bending moment generated when force is applied to the rigidity of the curved plate is reduced. The length of the curved plate can be made almost uniform over the entire length of the curved plate, so that even when the cuff band with a built-in curved plate is wrapped around a thin arm, it can be wrapped around a thick arm and the cuff band is widened. Also, the curved plate has a nearly uniform curvature over the entire length in the curved direction, and the cuff band fits smoothly whether it is worn on a thick arm or a thin arm, making it comfortable to wear. There is an advantage.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of a curved plate according to an embodiment of the present invention, Fig. 2 is a perspective view showing the above curved plate in a state with a small diameter, and Fig. 3 is a state of the same above curved plate in a large diameter state. FIG. 4 is a perspective view of a cuff band incorporating the above curved plate, FIG. 5 is a sectional view of the same cuff band, FIG. 6 is a perspective view showing another example of the present invention, and FIG. The figure is a sectional view of the same as above, FIGS. 8a and 8b are a perspective view and a developed view of a curved plate in still another example of the present invention, and FIGS. 9a and b are perspective views and developed views of a curved plate in still another example of the present invention. Developed view, Figure 10 is a perspective view of the conventional curved plate, Figure 11 is a perspective view of the same curved plate as above when it is unfolded, and Figure 12 is an explanatory view of the same curved plate as above wrapped around the arm. 1 is a curved plate.

Claims (1)

[Scope of Claims] 1. In a cuff band for a blood pressure monitor that incorporates a curved plate formed into a curved shape by a flexible member and can be worn around the arm, the curved plate is attached to both ends in the curved direction. A cuff band for a blood pressure monitor characterized by being formed so that its rigidity gradually increases toward the center. 2. The cuff band for a blood pressure monitor according to claim 1, wherein the thickness of the curved plate is gradually increased from both ends in the curved direction toward the center. 3. The cuff band of a blood pressure monitor according to claim 1, wherein the width of the curved plate in the direction orthogonal to the curved direction is gradually widened from both ends in the curved direction toward the center. .