JP2005087289A - Chair for dental treatment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To realize cushioning characteristics according to the body pressure of a patient in a chair for dental treatment. <P>SOLUTION: A plurality of bag bodies 5 are arranged on the respective upper surfaces of a backrest 2, a contour seat 3 and a foot seat 4 so as to cover them. On the upper surfaces of the respective bag bodies 5, a body pressure measuring sensor 6 for measuring the body pressure is arranged. By controlling the internal pressure of the bag bodies 5 on the basis of the measured signals of the body pressure measuring sensor 6, the cushioning characteristics property of the bag bodies 5 are adjusted. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a dental treatment chair for sitting and sleeping on a patient during dental treatment.

  FIG. 4 is an external view of a dental treatment chair disclosed in Patent Document 1 for explaining an example of a conventional dental treatment chair. In the figure, 21 is a base, 22 is a backrest, 23 is a contour seat, 24 is a foot seat, 25 is a neck support, 26 is a lumbar support, and 27 is a knee support.

The dental treatment chair basically includes a base 21, a backrest 22, a contour seat 23, and a foot seat 24, and the back rest 22, the contour seat 23, and the foot seat 24 are raised on the base 21. A mechanism that can adjust the descent or inclination angle is incorporated. In this example, a neck support 25 that supports the patient's cervical vertebra and a lumbar support 26 that supports the lumbar region are provided on the front surface of the backrest 22 so as to be movable in the vertical direction. A knee support 27 for supporting the section is provided to be movable in the front-rear direction. By moving and adjusting the neck support 25, the lumbar support 26, and the knee support 27, the dental treatment chair can be adapted to the patient's body shape.
JP 2002-159540 A

  The dental treatment chair as described with reference to FIG. 4 can move and adjust the neck support 25, the lumbar support 26, and the knee support 27 to suit the patient's body shape. However, the cushioning property at the portion where the patient's body contacts the seat is determined by the material of the seat, and the comfortable cushioning property is not necessarily exhibited. If a material having a high elastic modulus is selected as the cushion material for the seat, the body sinks in a portion where the pressure applied to the seat is large, such as the waist and the head, which is not preferable. If a material with a low elastic modulus is selected, the sheet will feel firm, which is also not preferred. Depending on the pressure distribution that each part of the body applies to the seat, it may be possible to change the elastic modulus partially, but the part where the body applies pressure to the seat varies depending on the patient's physique, and the weight is also individual patient Therefore, a sheet suitable for an individual patient cannot be realized. Furthermore, there is also a problem that the pressure distribution differs depending on the inclination angle of the backrest 22 and the foot seat 24. There is also a problem that the position of the support must be adjusted according to the individual patient's physique.

  The present invention has been made in view of the above-described circumstances, and can provide cushioning properties according to the pressure distribution applied to the seat by the patient. Furthermore, appropriate cushioning properties can be obtained depending on the physique of individual patients. An object of the present invention is to provide a dental treatment chair capable of realizing the above.

  The invention according to claim 1 includes a backrest, a contour seat, and a foot seat, and a plurality of bags are spread on an upper surface of at least one of the backrest, the contour seat, and the foot seat. The dental treatment chair is arranged, wherein the bag body is configured such that a pressure fluid is introduced therein, and a body pressure measurement sensor for measuring body pressure is disposed on the upper surface, It has a control means which controls the internal pressure of a bag based on the measurement signal of the body pressure measurement sensor.

  ADVANTAGE OF THE INVENTION According to this invention, there exists an effect that the dental treatment chair which gave moderate cushioning property according to the patient's weight can be implement | achieved.

  The present invention is arranged so that a plurality of bags are spread on the upper surface of the backrest, contour seat and foot seat, and a body pressure measurement sensor for measuring body pressure is arranged on the upper surface of the bag body, By introducing a pressure fluid into the seat so that the pressure corresponds to the measurement signal of the body pressure measurement sensor, it is possible to give the seat an appropriate cushioning property according to the body pressure, for a single dental treatment. The chair can be made into a seat that fits the body shape of each patient, from adults to children, and can be used for dental treatment with the treatment chair suitable for each patient.

  FIG. 1 is a perspective view of an essential part for explaining an embodiment of a dental treatment chair according to the present invention. In the figure, 1 is a base, 2 is a backrest, 3 is a contour seat, 4 is a foot seat, 5 is a bag, and 6 is a body pressure measurement sensor.

  The base 1 has a built-in mechanism capable of adjusting the backrest 2, the contour seat 3, the foot seat 4 ascending / descending, or the inclination angle. A body pressure measuring sensor 6 is disposed on the upper surface of each bag body 5. In this embodiment, one body pressure measuring sensor 6 is arranged for each bag body 5. As the body pressure measurement sensor 6, a sensor that can convert body pressure applied to the bag body 5 into a signal, for example, an electrical signal, is used. An appropriate sensor such as a strain detector such as a semiconductor strain gauge that converts pressing force into electric resistance, or a capacitive detector that converts pressing force into electric capacity can be used. A plurality of body pressure measurement sensors 6 may be arranged for one support. In that case, an average value or a maximum value of signal outputs obtained by the plurality of body pressure measurement sensors 6 in each bag body 5, etc. Appropriate calculation processing is performed so that the output signal of the body pressure measurement sensor 6 in the bag body 5 is obtained.

  In this embodiment, the bag body 5 is arranged on the upper surface of all the seats of the backrest 2, the contour seat 3, and the foot seat 4. However, the bag body 5 is not necessarily limited to being provided on all the sheets. The bag body 5 may be provided on any one or two of these sheets. Furthermore, the height of the backrest 2 may be lowered so as not to reach the patient's head, and a headrest may be provided separately. The bag body 5 may also be disposed on the upper surface of the headrest.

  An example of the structure of the bag 5 will be described with reference to FIGS. FIG. 2 is a cross-sectional view of a part of the arrayed bags, and FIG. 3 is an explanatory view with a mechanism for adjusting the pressure of the bags. In the figure, 6 is a body pressure measurement sensor, 7 is a substrate, 8a, 8b, ... are electromagnetic valves, 9a, 9b, ... are connection pipes, 10 is a pressure adjusting device, 11 is a pressure chamber, 12, 13 Is a stop valve, 14 is an electromagnetic valve, 15 is a pressure introducing pipe, 16 is a stop valve drive mechanism, and 17 is a pressure measurement sensor.

  A plurality of the bags 5 are attached to the upper part of the flexible substrate 7 and are configured so that a pressure fluid can be introduced therein. Examples of the material of the bag body 5 include a cloth impregnated with a resin, a resin film and a cloth layered, a sheet having flexibility and airtightness, a natural rubber, a synthetic rubber, and the like. A sheet having elasticity and airtightness is used. As described above, the body pressure measurement sensor 6 is disposed on the upper surface of the bag body 5. The shape is a shape that bulges so that the center rises, but is not limited to this shape, and may be an appropriate shape. Further, as the planar shape, an appropriate shape such as a square, a rectangle, a quadrangle, a polygon, a circle, or an ellipse can be adopted. Moreover, the planar shape of all the bags need not be the same. In order to make it difficult for the internal pressure of the adjacent bag body to be affected by the expansion of each bag body due to the internal pressure, the portion corresponding to the side wall is preferably made of a material that is less likely to be deformed than the upper portion. A gap may be provided between the adjacent bag body 5.

  The inside of the bag body 5 communicates with the pressure adjusting device 10 through a connection pipe 9a attached so as to communicate with a hole formed in the substrate 7, and an electromagnetic valve 8a is interposed in the connection pipe 9a. . The electromagnetic valve 8a is operated by a control device (not shown), and when the pressure adjustment of the bag body 5 is performed, the electromagnetic valve 8a is opened and is closed when the pressure adjustment is completed.

  The pressure adjusting device 10 is provided with a stop valve 12 for performing an operation of introducing a high pressure into the pressure chamber 11 and a stop valve 13 for performing a pressure reducing operation of the pressure chamber 11. A high-pressure fluid from the pressure introduction pipe 15 is introduced to the stop valve 12 side via the electromagnetic valve 14. Therefore, when the electromagnetic valve 14 is opened, the high pressure fluid is introduced into the pressure chamber 11 against the spring force of the stop valve 12, and the internal pressure of the pressure chamber 11 is gradually increased. Further, in a state where the electromagnetic valve 14 is closed, the stop valve 13 is pushed up against the spring force and the stop valve drive mechanism 16 is operated so that the valve of the stop valve 13 is separated from the valve seat, thereby the pressure chamber 11. The internal pressure can be gradually reduced. When the electromagnetic valve 8a is open, the pressure chamber 11 and the inside of the bag body 5 are in communication with each other, so that the internal pressure of the pressure chamber 11 and the internal pressure of the bag body 5 are the same. When the inner diameter of 9a is so small that the flow resistance becomes a problem, a time lag occurs between the rise and fall of the internal pressure of the bag body 5 with respect to the rise and fall of the internal pressure of the pressure chamber 11. Therefore, the control may be performed in consideration of this time lag. If the inner diameter of the connection pipe 9a is increased so that the flow path resistance does not become a problem, the internal pressure of the pressure chamber 11 and the internal pressure of the bag body 5 are the same without a time lag. A pressure measurement sensor 17 is provided so as to convert the internal pressure of the pressure chamber 11 into a signal, for example, an electric signal.

  The pressure adjustment operation will be described. When adjusting the internal pressure of the bag body 5, a control device (not shown) controls the electromagnetic valve 8a so that the electromagnetic valve 8a is opened. The control device compares the output signal of the body pressure measurement sensor 6 based on the body pressure of the patient with the output signal of the pressure measurement sensor 17 based on the internal pressure of the pressure chamber 11, and the output signal of the pressure measurement sensor 17 is the body pressure. When the output signal is smaller than the output signal of the measurement sensor 6, the internal pressure of the bag 5 is gradually increased by controlling the electromagnetic valve 14 to be opened. When the output signal of the pressure measurement sensor 17 and the output signal of the body pressure measurement sensor 6 are the same, the electromagnetic valve 14 is controlled to be closed, and the internal pressure of the bag body 5 is a value corresponding to the body pressure. It can be. When the output signal of the pressure measurement sensor 17 is larger than the output signal of the body pressure measurement sensor 6, the control device operates the stop valve drive mechanism 16 with the electromagnetic valve 14 closed, and communicates the pressure chamber 11 to the atmosphere. The internal pressure of the bag body 5 is gradually reduced. When the output signal of the pressure measurement sensor 17 and the output signal of the body pressure measurement sensor 6 become the same, the operation of the stop valve drive mechanism 16 is stopped, and the internal pressure of the bag body 5 is set to a value corresponding to the body pressure. can do.

  In the above description, the description is for one bag body 5, but by connecting the connection pipe 9 b to the other bag body 5 and further connecting the connection pipe (not shown) with the other bag body 5, The pressure of the bag body 5 can be adjusted. Of course, the pressure adjusting device described above may be provided for each bag body 5. This increases the cost but has the advantage of shortening the adjustment time. The bag bodies 5 may be grouped, for example, grouped for each sheet, and a pressure adjusting device may be provided for each group.

  In the pressure adjustment operation described above, with respect to the output signal of the pressure measurement sensor 17, the output signal of the body pressure measurement sensor 6 is set to the target value, and the output signal of the pressure measurement sensor 17 is the same value as the output signal of the body pressure measurement sensor 6. However, a value obtained by multiplying the output signal of the body pressure measurement sensor 6 by a predetermined ratio may be set as the target value. In that case, when the above-mentioned ratio is made larger than 1, the cushioning property of the bag can be made hard, and when the above-mentioned ratio is made smaller than 1, the cushioning property of the bag can be made softer. it can. Of course, by setting this ratio to a different ratio for each seat or for each appropriate region, cushioning properties corresponding to the body part of the patient can be provided. Furthermore, the pressure adjustment mechanism is not limited to the above-described one, and any mechanism that can control the internal pressure of the support based on the output signal of the body pressure measurement sensor may be used.

  In addition, as the pressure fluid introduced into the support, a gas such as air or a liquid such as oil or water can be used.

  The adjustment of the internal pressure of the bag body described above is preferably performed every time the angle of the seat of the chair is changed. Further, in long-term treatment, the target value can be changed every predetermined time, for example, about every 10 minutes. For example, by changing the target value so as to be softened, the patient's fatigue can be reduced. It can be reduced. Thus, the cushioning property can be changed at appropriate time intervals, and the burden on the patient's body can be reduced and the patient's tension can be eased.

  In the chair for dental treatment, the cushioning property can be adjusted according to the body pressure of the patient, so that it is effective for use in dental treatment.

It is a principal part perspective view for demonstrating the 1st Example of the chair for dental treatment of this invention. It is sectional drawing of a part of arrayed bag. It is explanatory drawing which attached | subjected the mechanism for adjusting the pressure of a bag body. It is a principal part perspective view for demonstrating an example of the conventional chair for dental treatment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Base, 2 ... Backrest, 3 ... Contour seat, 4 ... Foot seat, 5 ... Bag body, 6 ... Body pressure measuring sensor, 7 ... Substrate, 8a, 8b, ... Electromagnetic valve, 9a, 9b ,..., Connecting pipe, 10, pressure adjusting device, 11, pressure chamber, 12, 13, stop valve, 14, electromagnetic valve, 15, pressure introducing pipe, 16, stop valve driving mechanism, 17, pressure measurement sensor.

Claims (1)

  A dental treatment chair having a backrest, a contour seat, and a foot seat, and arranged so as to spread a plurality of bags on an upper surface of at least one of the backrest, the contour seat, and the foot seat. The bag body is configured such that a pressure fluid is introduced into the bag body, and a body pressure measurement sensor for measuring body pressure is disposed on an upper surface of the bag body. A dental treatment chair comprising control means for controlling based on a measurement signal of a measurement sensor.

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