JPH0520708U - Constant speed exhaust control device for blood pressure monitor - Google Patents

Abstract

(57) [Summary] [Objective] The present invention aims at shortening the adjustment time by eliminating the hysteresis of the adjustment when adjusting the decompression rate of the sphygmomanometer. . [Structure] A tubular body 1 which is an elastic body and has a cut 3, an adjusting body 5 having a screw-shaped portion, and an intermediate body 6, and the tubular body 1 is threaded through the intermediate body 6 by screwing the adjusting body 5. And press to adjust the size of the void 14 generated in the cut 3. [Effect] The decompression rate of the sphygmomanometer can be easily adjusted in a short time, and the blood pressure can be measured with an excellent decompression characteristic and a small error.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a constant speed exhaust control device for a sphygmomanometer capable of reducing the pressure of the armband at a constant decompression rate and easily adjusting the decompression rate.

[0002]

[Prior Art]

 As a conventional constant speed exhaust valve for a sphygmomanometer, an exhaust valve configured as shown in FIG. 4 is known. In FIG. 4, a cut 23 is formed in a part of the cylindrical portion of the closed end portion 22 of the cylindrical body 21 formed of an elastic member having one end opened and the other end closed. . The large diameter portion 32 of the tubular body 21 is fitted in the hollow portion 33 of the exhaust valve case 24 while ensuring airtightness. A nut 27 is fixed to the convex portion 26 of the exhaust valve case 24, the tip 29 of the adjusting body 25 presses the cylindrical surface 30 of the tubular body 21, and the adjusting body 25 is screwed into the gap 23 to create a gap 34. It can be tightened and the decompression speed can be adjusted.

[0003]

[Problems to be solved by the device]

 However, in such a conventional example, since the tip end of the adjusting body 25 is in direct contact with the cylindrical surface 30 of the tubular body 21, a disadvantage occurs. That is, when the adjusting body 25 is screwed, the cylindrical surface 30 of the tubular body 21 with which the tip 29 of the adjusting body 25 is in contact will be twisted and deformed as the tip 29 rotates. Therefore, there is a drawback that the opening of the gap 34 is slightly changed due to the difference in the rotating direction of the adjusting body 25 and a hysteresis occurs in the adjustment of the decompression rate, which makes adjustment difficult and takes a long time. The object of the present invention is to eliminate such drawbacks of the related art and to adjust the decompression speed of the air inside the armband in a short time, which enables accurate blood pressure measurement with excellent decompression characteristics and less error. It is to provide a compact and high-performance constant-speed exhaust control device.

[0004]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention is connected to the air piping system of a sphygmomanometer so that the open end of the tubular body, which is the exhaust valve body, is located on the low pressure side, and the other end is closed. Is located on the high-pressure side, that is, on the air inflow side at the time of exhaust, and a cut is made in a part of the closed end cylindrical part of the cylindrical body made of an elastic member, and an intermediate body that contacts the cylindrical surface of the cylindrical body Is moved by an adjusting body, and the cylindrical surface of the cylindrical body is pressed by the intermediate body to form a gap at the break.

[0005]

[Action]

 With this configuration, when measuring the actual blood pressure, when the pressure on the arm girdle is high, the above-mentioned back pressure narrows the gap created in the tubular body by the regulator, and as the pressure on the arm girdle decreases, The voids become wider due to the restoring force of the tubular body. In other words, the decompression rate can be kept constant by this subtle change in the void area. Furthermore, since the shape, hardness, and elasticity of the tubular body are determined by design, the decompression rate can be controlled by the set amount of voids generated by the regulator. Further, when adjusting the decompression speed, the tubular body is not directly pressed by the screwing of the body, but the tubular body is pressed through the intermediate body to form a gap, so that the rotation of the body is prevented. It is difficult to transmit to the cylindrical body, and it is possible to deform the cylindrical body without distortion such as twisting.

[0006]

Embodiments] Embodiments of the present invention will be described below with reference to the drawings. 1 is a sectional view of an embodiment of the present invention, and FIG. 2 is a perspective view of a cylindrical body, an intermediate body, and an adjusting body in the embodiment of the present invention. FIG. 3 is a perspective view of an intermediate body according to another embodiment of the present invention. In FIGS. 1 and 2, the tubular body 1 having one end open and the other end closed is made of an elastic material such as rubber having elasticity. The closed end 2 is provided with a cut 3 in the radial direction. The large diameter portion 12 of the tubular body 1 is fitted in the hollow portion 13 of the exhaust valve case 4 while ensuring airtightness. The exhaust valve case 4 has a hollow cylindrical shape, and a convex portion 17 for accommodating the adjusting body 5 and the intermediate body 6 is provided on the cylindrical surface. A nut 7 is embedded and fixed in the convex portion 17, and the adjusting body 5 can be screwed with the nut 7 and can be advanced. Further, the plastic thin plate-shaped intermediate body 6 is fitted in the guide hole 8 penetrating the side surface of the exhaust valve case 4 at the lower portion of the convex portion 17 so that the intermediate body 6 can be smoothly moved. Further, the tip end 9 of the intermediate body 6 is configured to press the cylindrical surface 10 having a diameter larger than the outer shape of the end portion 2 of the tubular body 1, and the intermediate body 6 is moved by screwing the adjusting body 5 into it. A void 14 can be created in the cut 3 depending on the amount of screwing of the adjusting body 5. An O-ring 11 is provided on the upper part of the adjusting body 5 to ensure airtightness in the adjusting portion. The exhaust control device thus configured is connected to the air piping system of the sphygmomanometer so that the low pressure side has the open end 15 and the high pressure side has the closed end 16. In addition, although the shape of the intermediate body is a thin plate in the above-mentioned embodiment, the intermediate body is not limited to the above-mentioned shape, and may be a sphere, a cylindrical pin, or an adjusting body as shown in FIG. The same can be carried out with a pin or the like having a small rotational contact resistance with.

[0007]

[Effect of the device]

 As is clear from the above description, the cylindrical body is not directly pressed by the rotating adjustment body, but is pressed by the sliding intermediate body, which is unnecessary for the cylindrical body. Deformation such as twisting no longer occurs. For this reason, the void condition does not change depending on the direction of rotation of the adjuster, and the decompression rate can be adjusted without hysteresis. Further, by separating the adjusting body and the intermediate body, the degree of freedom in processing the surface shape pushing the cylindrical body is increased. In other words, it became possible to easily create a large area and irregular shape compared to the limited area and shape obtained only by processing the tip of the conventional adjustment body. For this reason, it becomes possible to press the tubular body in a more favorable state, and it is also effective in improving the pressure reduction characteristics. As described above, the adjustment is easy and good characteristics can be obtained, so that the time required for adjustment can be greatly shortened, and it is necessary to measure blood pressure from systolic blood pressure to diastolic blood pressure. Since a decompression rate of 4 mmHg / sec was easily obtained, it had the effect of enabling accurate blood pressure measurement.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is an oblique view showing a tubular body, an intermediate body, and an adjusting body according to an embodiment of the present invention.

FIG. 3 is a perspective view of an intermediate body according to another embodiment of the present invention.

FIG. 4 is a cross-sectional view showing a conventional example.

[Explanation of symbols]

 1 21 Cylindrical body 3 23 Break 4 24 Exhaust valve case 5 25 Regulator 6 Intermediate 7 7 Nut 14 34 Void

Claims (1)

[Scope of utility model registration request] 1. An exhaust device connected to an air piping system of a sphygmomanometer to reduce the pressure in the armband at a constant decompression rate when measuring blood pressure, and the end portion side having a cylindrical opening is located on the low pressure side. , And the closed end side is located on the high-pressure side in the air piping path, and the tubular body is composed of an elastic member provided with a notch in the radial direction of the closed end, and a cylinder of the tubular body. A constant velocity exhaust control device for a sphygmomanometer, characterized in that it comprises an adjusting body for pressing a surface, and that the gap of the cut can be adjusted by pressing the adjusting body on a cylindrical surface of a cylindrical body. For a sphygmomanometer characterized in that by disposing a separate intermediate body between the adjusting body and the cylindrical surface of the cylindrical body, the cylindrical surface of the cylindrical body is pressed through the intermediate body. Constant speed exhaust control device.