JPS62192162A - Dental theapy chair - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a dental treatment chair, and in particular, an air bag equipped with a compressed air supply/exhaust mechanism is installed between the headrest and the backrest. The present invention relates to a dental treatment chair that stably supports the patient's neck from below with the air bag, thereby providing the patient with a comfortable treatment posture.

[Prior Art] In conventional dental treatment chairs, the support shaft of the safe table extending from the backrest can be freely inserted into and removed from the backrest in order to adapt to the sitting height of the patient, and the position of the safe table can be adjusted. It was formed so that it could be adjusted freely according to the length of the support shaft.

However, when designing a dental treatment chair, the height of the headrest is determined based on the standard sitting height of the patient, so in the case of a patient who sits extremely high, the area from the shoulders to the nape of the neck may be lowered from the backrest. Even if the head was removed and the head was held on a rest table, the area from the shoulders to the nape of the neck was not stabilized, making it difficult to obtain a stable treatment posture.

To solve this problem, the applicant previously disclosed in Japanese Patent Application Laid-Open No. 14855/1987 that the patient's neck is supported between the backrest and the rest table on a support shaft that extends from the backrest and supports the head rest. We proposed a dental treatment chair equipped with a neck pad for treatment.

[Problems to be Solved by the Invention] However, with the conventional neck pad, the position and height of the neck pad must be adjusted each time according to the sitting height of the patient, making it complicated and cumbersome to use. There were some problems.

[Means for Solving the Problems] The present invention has been made in view of the above points, and it automatically adjusts the amount of air supplied to and exhausted from the airbag according to the sitting height of the patient, thereby improving the patient's health. Even when the neck and shoulders are held stably from below and the distance between the backrest and the headrest is increased, the amount of air in the airbag is adjusted and the distance is adjusted to prevent the support shaft from being exposed. By completely filling the chair, it becomes an integrated dental treatment chair from the backrest to the anchorage. That is, (1) in a dental treatment chair in which a support shaft is vertically provided on the proximal end side of the restroom, and the distance between the backrest and the restroom is supported in a telescopic manner,
A spring body wound around the support shaft between the headrest and the backrest, an air bag provided on the outer periphery of the spring body, and a device for supplying and exhausting compressed air to the air bag. and (2) a dental treatment chair in which a support shaft is vertically disposed on the proximal end side of the rest table and the distance between the backrest and the rest table is supported in a telescopic manner. , a spring body wound around the support shaft between the headrest and the backrest, an air bag provided around the outer periphery of the spring body, and a device for supplying and exhausting compressed air to the air bag. a guide cylinder provided in the backrest for inserting and housing the support shaft and/or a detector provided on the support shaft; and a detector that detects the amount of air supplied to and exhausted from the airbag in response to the detector. This dental treatment chair is characterized by being equipped with a control device for automatic adjustment.

[Example] An example of the dental treatment chair of the present invention will be specifically described below based on the drawings.

FIG. 1 is a longitudinal cross-sectional view of the headrest and backrest portion of a dental treatment chair according to an embodiment of the present invention, and FIG. 2 is a longitudinal sectional view of the backrest with a portion of the backrest cut away to expose a portion of the inside of the backrest. FIG. 3 shows a block diagram of the control device 6. FIG.

In FIG. 1, a backrest 1 includes a foam 1a inside and covers the surface with a leather sheet 1b. Inside the backrest 1, a support shaft 4 is slidably inserted into a guide tube 3, and at a base end 4a of the support shaft 4, a rest base 2 is swingably mounted. installed.

The outer 1 of the support shaft 4 between the headrest 2 and the backrest 1
A spring body 5 such as a ring-shaped spring is loosely wound around the circumference. An airbag 7 and an air supply and exhaust lower a for supplying and exhausting compressed air to and from the airbag 7 are provided on the backrest 1 side on the outer circumference of the spring body 5, and the tip of this air supply and exhaust lower a is as follows.
A supply/exhaust flowmeter 15 that measures and integrates the amount of compressed air supplied and exhausted, supply/exhaust valves 14a and 14b that supply and exhaust compressed air, and an air source 17 and an atmosphere opening port, respectively. It is connected.

Further, a guide tube 3 for housing the support shaft 4 of the headrest 2 is disposed inside the backrest 1, and a plurality of light emitting sections 8a and light receiving sections are provided on both sides of the guide tube 3. A photodetector 8 is provided with the portion 8b facing the photodetector 8.

Further, a control device as shown in FIG. 3 detects the position of the support shaft 4 using the photodetector 8 and adjusts the amount of air in the airbag 7 by controlling the opening and closing of the supply and exhaust valves 14a and 14b. 6 is provided.

When a patient sits on a dental treatment chair, the head rest 2 is retracted according to the patient's sitting height and adjusted to the position of the patient's head. The position of the Menji Anto stand is detected by the number (current, etc.) that responds to the light of the photodetector 8 disposed at 3 or the change t (voltage, etc.) when receiving the light, and the air The compressed air to be supplied to or exhausted from the air bag 7 is adjusted by opening and closing the air supply valve 14a and the exhaust valve 14b according to operation commands from the control device 6 that calculates, compares, and operates the amount of air to be supplied to the air bag 7. . At this time, the amount of air supplied and exhausted is measured and integrated by the supply and exhaust flow meter 15, and is fed back to the control device ff6 to return it to the air bag 7.
The amount of air is maintained at a predetermined amount for one moment.

The control device 6 includes a photodetector 8 that detects the amount of movement of the support shaft 4 based on the number of lights on the light receiving portion 8b housed in the guide tube 3 or an electric signal at the time of blinking, and a photodetector 8 that detects the amount of movement of the support shaft 4 based on the amount of movement. The standard setter 11 calculates and amplifies the amount of air necessary to inflate the airbag 7 to obtain a reference value, and compares this reference value with the Wt calculated air amount (comparison value) supplied to the airbag 7. a comparator 12 that instructs either the air supply operation device 13a or the exhaust operation device 13b to operate either the air supply valve 14a or the exhaust valve 14b; It is comprised of a supply/exhaust flowmeter 15 that measures and integrates the amount of air that has been added, and a converter 16 that calculates and amplifies this integrated amount of air.

In other words, when the position of the support shaft 4 of the safety pad 2 is adjusted and the position of the safety pad 2 is detected by the photodetector 8, this detected value determines the amount of air that should be supplied to the airbag 7. is converted to a reference value by the reference setter 11 that calculates and amplifies the air, and this reference value is calculated as the cumulative air amount (
The amount of air supplied to the airbag 7 is adjusted based on the position of the support shaft 4 of the headrest 2 by feedback control.

For example, if the reference value>comparison value (the amount of air supplied to the air bag 7 is small), the comparator 12 tells the air supply operator 13a to open the air supply valve 14a (exhaust valve is commanded to close), and compressed air is supplied to the airbag 7. Also, the air supplied at this time is measured by a supply/exhaust flow meter 15, and a converter 16 that calculates and amplifies this measured value (supply air flow meter: addition, exhaust flow meter: two subtractions)
After being reconverted into a comparison value by .

In addition, when the reference value is smaller than the comparison value (the amount of air in the airbag 7 is greater than or equal to the reference value), the exhaust valve 14b is opened from the comparator 12 to the exhaust operation device 13b (the air supply valve 14
a is commanded to close (m), and the compressed air in the air bag 7 is exhausted.The amount of air exhausted at this time is measured by the supply/exhaust flowmeter 15, and this measured value is sent to the converter. After being reconverted into a comparison value by 16, it is input again to the comparator 12, and feedback control is performed so that it follows the reference value in the same manner as described above.

In this way, by adjusting the position of the support shaft 4 of the headrest 2 to the sitting height of the patient, it is possible to automatically and stably hold the patient's neck and shoulders.

[Effects of the Invention] As described above in detail in the examples and the like, the dental treatment chair of the present invention can adjust the amount of air supplied to the air bag according to the sitting height of the patient. By stably holding the patient from below and placing the patient in a comfortable position, the operator can perform stable and accurate treatment.

In addition, even when the distance between the backrest and the headrest is increased, the airbag inflates and completely fills the gap, so the support shaft is not exposed and the backrest is moved away from the headrest. The entire structure can be seen as a continuous, integrated piece, making it an excellent dental treatment chair in terms of design.

Furthermore, in models equipped with a control system π, the appropriate amount of air can be automatically supplied to and exhausted from the air bag according to the height of the patient's sitting height, making it possible to easily adjust the headrest and create a stable dental treatment chair. It is what it is.

As described above, the present invention exhibits novel and excellent effects.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view of the headrest and backrest portion of a dental treatment chair according to an embodiment of the present invention, and FIG. 2 is a longitudinal sectional view of the backrest with a portion of the backrest cut away to expose a portion of the inside of the backrest. FIG. 3 is a front view of the Shinaba Cress l~ and the Antodai, and FIG. 3 shows a block diagram of the control device. 1. Backrest 2: Headrest 3 Guide tube 4: Support shaft 5, Spring body 6. Control device 7: Air bag 7a: Air supply/exhaust port 8: Photodetector, 8a: Light emitting part 8b: Light receiving part 9: Neck part 10: Shoulder part 11・Reference setting device 12: Comparator 13a: Air supply operation device 13b = Exhaust operation device 14a: Air supply valve 14b: Exhaust valve 15 2. Supply and exhaust flowmeter 16/converter 17: Air source patent applicant Yoshida Seisakusho Co., Ltd. Attorney Mura 1) Yuki Yuuki Figure 1

Claims (4)

[Claims] (1) In a dental treatment chair in which a support shaft is vertically provided on the proximal end side of the safe table, and the distance between the backrest and the safe table is telescopically supported, the safe table and the backrest are connected to each other. The present invention is characterized in that it is configured by providing a spring body wound around the support shaft portion between the spring body, an air bag provided on the outer periphery of the spring body, and a device for supplying and exhausting compressed air to the air bag. dental treatment chair. (2) In a dental treatment chair in which a support shaft is provided vertically on the proximal end side of the safe table, and the distance between the backrest and the safe table is extended and contracted, the safe table and the backrest are connected to each other. an airbag provided around the outer periphery of the spring; a device for supplying and exhausting compressed air to the air bag; and a spring provided in the backrest. A detector disposed on the guide cylinder and/or the support shaft into which the support shaft is inserted and housed, and a control device that automatically adjusts the amount of air supplied to and exhausted from the air bag in response to the detector. A dental treatment chair featuring: (3) The dental treatment chair according to claim 2, wherein the detector is constructed using a microswitch, a potentiometer, a photocoupler, or the like. (4) The control device includes a reference setting device that calculates and amplifies the amount of air supplied to the airbag based on the detected value from the detector to obtain a reference value, and a reference setting device that calculates and amplifies the amount of air supplied to the airbag based on the detected value from the detector, and a A comparator that compares the converted comparison values and instructs an air supply operator or an exhaust operator to open or close an air supply valve or an exhaust valve, and a comparator that measures the amount of air supplied to the air bag.・It is comprised of a supply/exhaust flowmeter that integrates, and a converter that converts the cumulative air amount of the flowmeter into a comparison value by adding it during air supply and subtracting it during air exhaust. A dental treatment chair according to item 2 or 3.