JP7140737B2 - Suction pressure control device, suction device and dental treatment device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a suction pressure control device, a suction device, and a dental treatment device.

A dental treatment apparatus, which is an example of a medical apparatus, is equipped with a suction device that sucks liquid such as saliva and washing water accumulated in the oral cavity during treatment of a patient and discharges the liquid from the oral cavity. A vacuum device such as a vacuum syringe is connected to the suction device, and the tip of the vacuum device is inserted into the oral cavity of the patient to suck saliva and water.

The suction device performs control to open a built-in electromagnetic valve when sucking liquid such as saliva or wash water accumulated in the patient's oral cavity from the tip of the vacuum device. Also, the suction device performs control to close a built-in electromagnetic valve when the vacuum device is not used.

JP 2017-6214 A

However, when the tip of the vacuum device is inserted into the oral cavity, the tip of the vacuum device during suction sticks to the patient's oral mucosa, causing the suction device to suck liquids such as saliva and washing water accumulated in the oral cavity. Sometimes you can't. In particular, when sucking liquid such as saliva or wash water accumulated in the oral cavity of an elderly patient with loose oral mucosa, the tip of the vacuum device often sticks to the patient's oral mucosa.

If the tip of the vacuum device sticks to the patient's oral mucosa and liquids such as saliva and flushing water that have accumulated in the oral cavity cannot be discharged, the liquid that has accumulated in the oral cavity may be aspirated, or the liquid accumulated in the oral cavity may cause a sore throat. I feel relaxed. In addition, if the tip of the vacuum device sticking to the patient's oral mucosa is forcibly removed, there is a risk of damaging the oral mucosa.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and its object is to provide a suction pressure control device that can easily peel off even if the tip of a vacuum device sticks to the oral mucosa of a patient. The object is to provide a device and a dental treatment device.

A suction pressure control device according to the present invention is a suction pressure control device for controlling the suction pressure of a medical vacuum device, and includes a vacuum device connected to one end and a vacuum motor for generating suction pressure connected to the other end. An input unit for receiving a signal from a pressure sensor that detects the suction pressure of the pipeline, and a control unit for controlling opening and closing of a valve connected to the vacuum motor or the suction pipeline, wherein the valve is connected to the suction pipeline. The control unit can set a plurality of control modes for the suction pressure of the suction duct so that the suction pressure of the suction duct becomes the first suction pressure. A first patient control mode in which the pressure regulating valve is adjusted and a second patient control mode in which the pressure regulating valve is adjusted such that the suction pressure in the suction line is a second suction pressure that is lower than the first suction pressure. If the suction pressure detected by the pressure sensor is greater than a predetermined value, control the opening and closing of the vacuum motor or the valve to reduce the suction pressure in the suction pipe, and according to the control mode The suction pressure in the suction line is adjusted by adjusting the pressure regulating valve, but when adjusting the suction pressure in the suction line in the second patient control mode, the valve is based on the suction pressure detected by the pressure sensor. control is not performed .

The suction device of the present invention includes a medical vacuum device, a suction pipeline having one end connected to the vacuum device and the other end connected to a vacuum motor for generating suction pressure, and a suction pipeline connected to the suction pipeline. a pressure sensor that detects the suction pressure of the suction line, a valve connected to the suction line, a vacuum motor that generates the suction pressure of the suction line, and the suction pressure control device.

The dental diagnostic apparatus of the present invention comprises a medical vacuum instrument, a suction conduit having one end connected to the vacuum instrument and the other connected to a vacuum motor for generating a suction pressure, and a suction line connected to the suction conduit for suction. A pressure sensor that detects the suction pressure of the duct, a valve connected to the suction duct, a vacuum motor that generates the suction pressure of the suction duct, the above-described suction pressure control device, and a state in which the patient is seated. , or a chair device that allows medical treatment with the patient lying down.

Another dental treatment apparatus of the present invention includes a housing that can be carried by an operator when visiting a doctor, a medical vacuum instrument, and a vacuum motor to which the vacuum instrument is connected to one side and to generate suction pressure to the other side. a pressure sensor connected to the suction pipeline for detecting the suction pressure of the suction pipeline; a valve connected to the suction pipeline; A vacuum motor for generating pressure, and the suction pressure control device provided in the housing.

According to the suction pressure control device, the suction device, and the dental treatment device of the present invention, when the suction pressure detected by the pressure sensor is greater than a predetermined value, the opening and closing of the vacuum motor or the valve is controlled to reduce the suction pressure of the suction pipe. Since it is changed, even if the tip of the vacuum device sticks to the patient's oral mucosa, it can be easily peeled off.

1 is a perspective view schematically showing the configuration of a medical device according to Embodiment 1 of the present invention; FIG. FIG. 2 is a diagram schematically showing a pipeline configuration of the suction device according to Embodiment 1 of the present invention; 2 is a control block diagram of the medical device according to Embodiment 1 of the present invention; FIG. 4 is a flowchart for explaining the operation of the suction device according to Embodiment 1 of the present invention; 4 is a timing chart for explaining the operation of the suction device according to Embodiment 1 of the present invention; 4 is a timing chart for explaining the operation of the Saraeva syringe according to Embodiment 1 of the present invention; FIG. 4 is a timing chart for explaining the operation of tube cleaning in Embodiment 1 of the present invention; FIG. 4 is a timing chart for explaining the operation of the elderly mode according to Embodiment 1 of the present invention; FIG. 9 is a flow chart for explaining the operation of the suction device according to Embodiment 2 of the present invention; FIG. FIG. 4 is a block diagram schematically showing the configuration of a medical device in a modified example of the present invention; It is a timing chart for explaining the operation of the medical device in the modified example of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.
<Embodiment 1>
First, the configuration of the medical device according to Embodiment 1 of the present invention will be described. In Embodiment 1, a dental diagnostic apparatus will be described as an example of a medical apparatus.

FIG. 1 is a perspective view schematically showing the configuration of a medical device according to Embodiment 1 of the present invention. Referring to FIG. 1, a medical device 100 according to Embodiment 1 includes a medical device body 10, a medium conduit 20, a medical handpiece 30, a vacuum device 40, a suction device 200, and a vacuum motor. 300. The suction device 200 is built in the spittoon 2 and is connected to the vacuum device 40 via the suction tube 44 . The vacuum device 40 and the suction tube 44 are configured to be detachably connectable to the spittoon 2 . Note that the suction device 200 may include the vacuum device 40 and the vacuum motor 300 .

The diagnostic apparatus main body 10 includes a diagnostic table 1 , a spittoon 2 , an illumination device 3 , an illumination device arm 4 , a tray table 5 , and a tray table arm 6 . The medical examination table 1 is configured so that a patient can receive medical treatment in a seated or supine state. The examination table 1 includes a base 1a, a seat plate 1b, a back plate 1c, a headrest 1d, and an armrest 1e. The seat plate 1b is installed on the base 1a so as to be vertically movable. The back plate 1c is attached to one end of the seat plate 1b so that it can be raised and lowered. The headrest 1d is tiltably attached to the upper end of the back plate 1c. The armrest 1e is installed on the side of the seat plate 1b.

A spittoon 2 is installed on the side of the medical table 1 . The spitting receptacle 2 includes a body portion 2a, a basin 2b, and a cup water tap (glass water supply portion) 2c. A basin 2b is installed at the upper end of the body portion 2a. A water cylinder extending from the cup water tap 2c is installed in the basin 2b. The lighting device 3 is connected to the spittoon 2 via the lighting device arm 4 . The illumination device 3 is, for example, a shadowless lamp.

The tray table 5 is connected to the base 1a via a tray table arm 6. As shown in FIG. The tray table 5 is used to place and hold medical instruments, medicines and medical handpieces (instruments) 30 . The tray table 5 also includes an operation setting section 5a for setting operations of the medical table 1, the medical handpiece 30, and the like.

FIG. 2 is a diagram schematically showing a pipeline configuration of the suction device according to Embodiment 1 of the present invention. FIG. 3 is a control block diagram of the medical device according to Embodiment 1 of the present invention. 2 and 3, a vacuum syringe 41 and a Saraeva syringe 42 will be described as examples of the vacuum device 40. FIG. The tip of the vacuum device 40 is inserted into the patient's oral cavity to suck liquid such as saliva and wash water accumulated in the patient's oral cavity. The Saraeva syringe 42 has a tip opening smaller than that of the vacuum syringe 41, and has a small suction amount for sucking liquid such as saliva and washing water accumulated in the oral cavity. Therefore, even if the tip of the Saraeva syringe 42 sticks to the oral mucosa, the tip of the Saraeva syringe 42 is easier to peel off from the oral mucosa than the vacuum syringe 41 . Therefore, in Embodiment 1, the suction avoidance process, which will be described later, is not performed on the Saraeva syringe 42 . Of course, the suction avoidance process may be performed on the Saraeva syringe 42 as well.

The suction device 200 has a suction line 201 that connects the vacuum syringe 41 via the suction tube 44 and a suction line 202 that connects the Saraeva syringe 42 via the suction tube 44 . The suction pipeline 202 and the suction pipeline 201 are connected to the vacuum tank 260 via one suction pipeline 203 . The vacuum tank 260 is a device that separates the gas and liquid sucked by the vacuum device 40, and has the same structure as a normal tank that separates gas and liquid. Specifically, the vacuum tank 260 has a container, and an inlet for connecting the suction pipe line 203 to the upper part of the container and an exhaust port for connecting the suction pipe line 204 leading to the vacuum motor 300 are provided. there is At the bottom of the container is arranged a drain port for connecting a drain line 205 leading to a drain pipe. A check valve may be provided in the middle of the suction line 203 and the drain line 205 .

Further, the suction device 200 has a suction pipeline 206 for connecting the suction pipeline 203 and the vacuum cleaning tank 270, and a suction pressure pilot pipeline 207 connected to a valve provided in each of the suction pipelines. is doing. The suction pipe and the drain pipe are made of silicone, for example, and have a two-layer structure, for example. The material of the inner layer of this two-layer structure is fluororesin, and the material of the outer layer is urethane.

A pressure sensor 250 and an electropneumatic regulator 251 are provided in the suction pressure pilot line 207 . It should be noted that the suction device 200 only needs the function of releasing the suction of the vacuum device 40 to the oral mucosa, and only the pressure sensor 250 is sufficient if the suction pressure (suction pressure) is not adjusted. In Embodiment 1, an example will be described in which the suction device 200 has a pressure control function of adjusting the suction pressure of the vacuum device 40 in addition to the function of releasing the suction of the vacuum device 40 to the oral mucosa.

Here, the pressure sensor 250 measures the suction pressure of the suction pipeline via the suction pressure pilot pipeline 207 . The pressure sensor 250 is a device that detects the suction pressure and converts it into an electrical signal corresponding to the magnitude of the suction pressure, and a normal pressure sensor can be used. The electropneumatic regulator 251 is one of the proportional control valves and is a device capable of continuously controlling the suction pressure in proportion to the input, which is an electric signal, and is a pressure regulator for adjusting the suction pressure of the suction pipe. valve. In Embodiment 1, the electro-pneumatic regulator 251 is used to adjust the suction pressure of the suction line according to the control mode (for example, the elderly mode).

The vacuum cleaning tank 270 is a tank for storing cleaning liquid for automatically cleaning the vacuum tank 260 when the main switch is turned on or when the cleaning switch is pressed after medical treatment. In Embodiment 1, as will be described later, the suction pressure of the suction pipe 201 is used as an outlet for releasing to the atmosphere via the suction pipe 206 .

The vacuum motor 300 is a device that includes a motor and a suction fan that is rotated by the motor, and generates a suction force. The vacuum motor 300 can be a normal vacuum motor used in a normal dental diagnostic device or the like.

Referring to FIG. 2, medical device 100 further comprises a valve. The valves are configured to allow gases and liquids drawn from the vacuum fixture 40 to flow to the vacuum tank 260 . The valve may be located within the aspiration line or may be located separately from the aspiration line.

Embodiment 1 includes an on-off valve connected to the suction line. Each of the on-off valves may be a solenoid valve. Control valve A210 is arranged between vacuum tank 260 and vacuum motor 300 . An on-off valve 211 is arranged between the control valve A 210 and the suction pressure pilot line 207 . The control valve B220 is arranged between the suction line 201 and the suction line 203 connected to the vacuum syringe 41 . An on-off valve 221 is arranged between the control valve B 220 and the suction pressure pilot line 207 . Control valve C 230 is arranged between vacuum tank 260 and vacuum cleaning tank 270 . An on-off valve 231 is arranged between the control valve C 230 and the suction pressure pilot line 207 . The control valve D240 is arranged between the suction line 202 and the suction line 203 connected to the Saraeva syringe 42 . An on-off valve 241 is arranged between the control valve D 240 and the suction pressure pilot line 207 .

Referring to FIG. 1, a medical handpiece 30 is an instrument for dental care. The medical handpiece 30 may include multiple handpieces. The medical handpiece 30 includes, for example, a first air turbine handpiece (high speed handpiece) 31, a second air turbine handpiece (high speed handpiece) 32, a micromotor handpiece (low speed handpiece) 33, and a three-way handpiece. syringe 34 and the like. The medical handpiece 30 is configured to be engaged with a doctor-side handpiece holder 5 b provided on the tray table 5 .

On the other hand, the vacuum syringe 41 and the Saraeva syringe 42, which are the vacuum devices 40, are configured to be locked to the assistant-side device holder 2d provided in the spittoon 2. As shown in FIG. A display unit 43 for displaying error information and operation information of the vacuum device 40 is provided in the device holder 2d.

Next, FIG. 3 is a control block diagram of the medical device according to Embodiment 1 of the present invention. The pipeline configuration of the medical device 100 according to the first embodiment will be described with reference to FIGS. 2 and 3. FIG. A medical device 100 shown in FIG. 3 is a chair unit, and includes a medical treatment table 1 as a chair, a spittoon 2 as a gargling device, a suction pressure control device having an operating device, and the like. Related known techniques such as CAN (Controller Area Network) communication are applied to the communication between the control boards in the medical device 100 . In the medical device 100, the medical table 1, the spittoon 2, the suction device 200, the vacuum motor 300, and the like communicate with each other by CAN communication to share the mutual status and perform control.

Specifically, during normal use of the vacuum syringe 41 and the Saraeva syringe 42, at least one of the vacuum devices 40 is picked up from the device holder 2d of the spittoon 2. It is detected by a sensor A 281 and a pickup sensor B 282, and when a start SWA 283 and a start SWB 284 are selected, the respective signals are turned ON.

For example, when the pickup sensor A281 detects that the vacuum syringe 41 has been picked up from the tool holder 2d of the spittoon 2, the start SWA 283 is turned ON, the vacuum motor 300 is activated, and the control valve A210 and the control valve A210 is opened, and liquids such as saliva and washing water accumulated in the oral cavity of the patient are sucked from the tip of the vacuum syringe 41 .

The control unit 280 shown in FIG. 3 includes a CPU (Central Processing Unit), a RAM (Random Access Memory), and a ROM (Read Only Memory). The CPU comprehensively controls the entire medical device 100 by executing an operating program stored in a ROM or the like. The ROM stores programs executed by the CPU and other data. The RAM serves as a work area when the CPU executes a program, and temporarily stores the program and data used when the program is executed. A pickup sensor A 281 , a pickup sensor B 282 , a start SWA 283 , a start SWB 284 , a cleaning mode SW 285 , an elderly mode SW 286 , a display section 43 and an input section 45 are connected to the control section 280 . A configuration including at least the control unit 280 and the input unit 45 constitutes a suction pressure control device that controls the suction pressure of the suction device 200 . The input unit 45 receives the sensor value of the pressure sensor 250 as well as the ON information of the cleaning mode SW 285 and the elderly mode SW 286 .

The cleaning mode SW 285 is a switch for selecting driving of a tube cleaning mode for cleaning the suction tube 44, the suction channel 201, etc., which will be described later. The elderly mode SW 286 is a switch for selecting a drive for reducing the suction force of the vacuum syringe 41, which will be described later. These switches may be provided as physical switches on the instrument holder 2d, or may be provided as one operation switch of the touch panel (input unit 45) provided in the display unit 43. FIG.

Next, FIG. 4 is a flow chart for explaining the operation of the suction device according to Embodiment 1 of the present invention. The operation of the suction device according to the first embodiment will be described with reference to FIG. First, the control unit 280 determines whether or not the doctor, the assistant, etc. have picked up the vacuum syringe 41 from the instrument holder 2d and selected to use the vacuum syringe 41 (step S101). The control unit 280 determines that the doctor, assistant, etc. have selected to use the vacuum syringe 41 when the pick-up sensor A 281 is turned ON and the signal from the start SWA 281 is turned ON. When the use of the vacuum syringe 41 is selected (YES in step S101), the control unit 280 turns the start SWA 283 to the ON state, starts the vacuum motor 300, opens the control valve A210 and the control valve A210, and opens the vacuum syringe 41. The drive for sucking the liquid or the like from the tip of is started (step S102).

In the suction device according to Embodiment 1, when suction by the vacuum syringe 41 is started, suction avoidance processing is started. In the suction avoidance process, the controller 280 first acquires a sensor value (suction pressure) from the pressure sensor 250 (step S103). Here, the sensor value of the pressure sensor 250 is a predetermined value (threshold value) or less when liquid such as saliva or wash water accumulated in the oral cavity of the patient is sucked. When the tip of the syringe 41 is sucked, it rapidly increases and exceeds a predetermined value (threshold).

The control unit 280 determines whether or not the tip of the vacuum syringe 41 sticks to the patient's oral mucosa based on whether or not the sensor value (suction pressure) acquired from the pressure sensor 250 is greater than a predetermined value (threshold value) ( step S104). If the sensor value (suction pressure) is equal to or less than the predetermined value (threshold) (NO in step S104), the control unit 280 returns the process to step S103. When the sensor value (suction pressure) exceeds a predetermined value (threshold value) (YES in step S104), the control unit 280 stops driving the suction of the liquid or the like from the tip of the vacuum syringe 41 (step S105). Although not shown, the control unit 280 returns the vacuum syringe 41 to the tool holder 2d after starting the suction drive, and the pickup sensor A281 is turned OFF, or the start SWA 283 is turned ON. In this case, the drive for sucking the liquid or the like from the tip of the vacuum syringe 41 is stopped.

FIG. 5 is a timing chart for explaining the operation of the suction device according to Embodiment 1 of the present invention. It should be noted that the timing at which the drive for sucking the liquid or the like from the tip of the vacuum syringe 41 in step S102 is started is the timing of time t1 shown in FIG. At time t1, the pickup sensor A281 is ON, the start SWA 283 is ON, the vacuum motor 300 is ON, and the control valve A210 and control valve B220 are open (ON).

The control unit 280 determines that the sensor value (suction pressure) becomes greater than a predetermined value (threshold value) at time t2 and that the suction is performed (ON). When the controller 280 determines that the suction is performed, the controller 280 first closes (OFF) the control valve A210 in order to stop the driving of sucking the liquid or the like from the tip of the vacuum syringe 41 at time t3. By closing (OFF) the control valve A210, the suction pressure of the vacuum motor 300 is cut off from the suction pipes 201 and 203. However, since the tip of the vacuum syringe 41 is stuck to the patient's oral mucosa, the suction pressure of the suction channels 201 and 203 is kept high. Therefore, the control unit 280 opens (ON) the control valve C230 to release the suction pressure of the suction channels 201 and 203 to the vacuum cleaning tank 270 through the suction channel 206 (release to the atmosphere). The suction pressure of the suction lines 201 and 203 is released to the vacuum cleaning tank 270 via the suction line 206, so that the tip of the vacuum syringe 41 sticking to the oral mucosa of the patient can be easily peeled off.

At time t3, the control valve A210 is closed (OFF) and the control valve C230 is opened (ON) at the same time. It is preferred to control the valves in order of opening (ON). In FIG. 5, a period is provided from after the timing of time t2 to the timing of time t3, but timing of time t3 may be started immediately after the timing of time t2.

Returning to FIG. 4, the control unit 280 starts counting a time counter (T-CNT) that counts the time from the suction stop state in step S105 to the suction state (step S106). The control unit 280 determines whether the count of the time counter (T-CNT) is longer than a predetermined time (step S107). If the count of the time counter (T-CNT) is equal to or less than the predetermined time (NO in step S107), control unit 280 returns the process to step S105. Here, the predetermined time is the time during which the suction pressure of the suction ducts 201 and 203 can be released sufficiently so that the tip of the vacuum syringe 41 sticking to the patient's oral mucosa can be easily peeled off. , and the time during which backflow to the vacuum syringe 41 can be prevented. Let the predetermined time be, for example, about 0.5 seconds.

When the count of the time counter (T-CNT) is longer than the predetermined time (YES in step S107), the control unit 280 determines whether or not an operation to end the suction by the vacuum syringe 41 has been accepted (step S108). For example, the control unit 280 determines that an operation to end the suction by the vacuum syringe 41 has been received when the doctor, the assistant, or the like has turned the start SWA 283 to the OFF state. When determining that an operation to end suction has been received (YES in step S108), the control unit 280 ends suction with the vacuum syringe 41. FIG. Note that the adsorption avoidance process refers to the process surrounded by the dashed line in FIG. 4 in steps S103 to S107.

If it is determined that the operation to end the suction has not been received (NO in step S108), the control unit 280 returns the process to step S102 and continues the driving of sucking the liquid or the like from the tip of the vacuum syringe 41. When continuing the drive for sucking the liquid or the like from the tip of the vacuum syringe 41, the control valve C230 is closed (OFF) and the control valve A210 is opened (ON) as shown at the timing of time t4 shown in FIG. conduct. Since the determination in step S108 is made in a short period of time, if the end of suction is not accepted, the state of suction is immediately restored. The controller 280 can prevent backflow to the vacuum syringe 41 by shortening the recovery time. At time t4, the control valve A210 is opened (ON) and the control valve C230 is closed (OFF) at the same time. It is preferable to control the valves in order of opening (ON) of A210.

Returning to FIG. 4, if the use of the vacuum syringe 41 is not selected (NO in step S101), the control unit 280 causes the doctor or assistant to pick up the Saraeva syringe 42 from the instrument holder 2d and use the Saraeva syringe 42. It is determined whether or not it has been selected (step S110). The control unit 280 determines that the doctor, assistant, etc. have selected to use the Saraeva syringe 42 when the pickup sensor B 282 is turned ON and the signal from the start SWB 282 is turned ON. If the use of the Saraeva syringe 42 is selected (YES in step S110), the control unit 280 turns the start SWB 284 ON, activates the vacuum motor 300, opens the control valve A210 and the control valve D240, and A drive for sucking liquid or the like from the tip of the syringe 42 is started (step S111).

Unlike the vacuum syringe 41, the suction avoidance process is not started in the suction device according to the first embodiment even if the suction by the Saraeva syringe 42 is started. The Saraeva syringe 42 has a smaller opening at the tip than the vacuum syringe 41, and has a smaller suction amount for sucking liquid such as saliva and cleansing water accumulated in the oral cavity than the vacuum syringe 41. Therefore, the tip of the Saraeva syringe 42 is less likely to stick to the patient's oral mucosa, and even if it sticks, it can be easily peeled off. Do not initiate evasive action.

FIG. 6 is a timing chart for explaining the operation of the Saraeva syringe according to Embodiment 1 of the present invention. It should be noted that the timing at which the drive for sucking the liquid or the like from the tip of the Saraeva syringe 42 in step S111 is started is the timing of time t1 shown in FIG. At time t1, the pickup sensor B 282 is ON, the start SWB 284 is ON, the vacuum motor 300 is ON, and the control valve A 210 and control valve D 240 are open (ON).

The control unit 280 determines that the sensor value (suction pressure) becomes greater than a predetermined value (threshold value) at the timing of time t2 shown in FIG. 6 (ON). However, since the suction avoidance process is not started in response to the suction of the Saraeva syringe 42, when the control unit 280 determines that the suction is performed, the control valve A210 stops the drive for suctioning the liquid or the like from the tip of the Saraeva syringe 42. is closed (OFF).

Returning to FIG. 4, the control unit 280 determines whether or not an operation to end the suction by the Saraeva syringe 42 has been received (step S112). For example, the control unit 280 determines that an operation to end suctioning by the Saraeva syringe 42 has been received when the doctor, the assistant, or the like has turned the start SWB 284 to the OFF state. If it is determined that an operation to end suctioning has been received (YES in step S112), the control unit 280 ends suctioning with the Saraeva syringe . If it is determined that the operation to end the suction has not been received (NO in step S112), the control unit 280 returns the process to step S111 and continues the driving of sucking the liquid or the like from the tip of the Saraeva syringe 42.

If the use of the Saraeva syringe 42 is not selected (NO in step S110), the control unit 280 determines whether or not the doctor, assistant, etc. have selected the tube cleaning process (step S120). The control unit 280 determines that the tube cleaning process has been selected when the input unit 45 receives that the doctor, the assistant, etc. have pressed the cleaning mode SW button displayed on the display unit 43 . When the tube cleaning process is selected (YES in step S120), the control unit 280 activates the vacuum motor 300 and turns on the cleaning mode SW while the control valve A210 and the control valve B220 are open. Suction for tube cleaning is started (step S121).

In the suction device according to the first embodiment, the tube such as the suction tube 44 can be washed by sucking the washing liquid from the tip of the vacuum syringe 41 as the tube washing process. In tube cleaning, the tube is cleaned by vigorously sucking the liquid with a very large suction pressure, so there is a risk that the pressure sensor value will exceed the threshold value. does not start adsorption avoidance processing.

FIG. 7 is a timing chart for explaining the tube cleaning operation according to the first embodiment of the present invention. It should be noted that the timing at which the cleaning of the tube of the vacuum syringe 41 is started in step S121 is the timing of time t5 shown in FIG. At time t5, the cleaning mode SW is turned ON with the vacuum motor 300 already in the ON state and the control valves A210 and B220 open (ON) from time t1. When receiving information that the cleaning mode SW is ON, the control unit 280 continues the tube cleaning operation until the cleaning mode OFF SW (not shown) is turned ON. Of course, the controller 280 may continue the tube cleaning operation while the cleaning mode SW is ON without providing the cleaning mode OFF SW.

The control unit 280 determines that the sensor value (suction pressure) becomes greater than a predetermined value (threshold value) at the timing of time t6 shown in FIG. 7 (ON). However, since the suction avoidance process is not started during the tube cleaning operation, when the control unit 280 determines that the suction is performed, the controller 280 closes (OFF) the control valve A210 in order to stop the suction of the cleaning liquid from the tip of the vacuum syringe 41. Do not control such as

Returning to FIG. 4, control unit 280 determines whether or not an operation to end the tube cleaning operation has been received (step S122). For example, the control unit 280 determines that an operation to end the tube cleaning operation has been received when the doctor, the assistant, or the like turns on the cleaning mode OFF SW. When determining that an operation to end the tube cleaning operation has been received (YES in step S122), control unit 280 ends the tube cleaning operation. When determining that an operation to end the tube cleaning operation has not been received (NO in step S122), the control unit 280 returns the process to step S121 and continues the tube cleaning operation.

If the tube cleaning process is not selected (NO in step S120), control unit 280 determines whether or not the doctor, assistant, or the like has selected the elderly mode (step S130). Note that the control unit 280 determines that the elderly mode has been selected when the input unit 45 receives that the doctor, the assistant, or the like has pressed the button for the elderly mode SW displayed on the display unit 43 . If the elderly mode is selected (YES in step S130), the controller 280 starts driving to suck liquid or the like from the tip of the vacuum syringe 41 in the elderly mode (step S131).

In the suction device according to Embodiment 1, liquid or the like can be suctioned from the tip of the vacuum syringe 41 in the elderly mode. Since the oral mucosa of elderly people is looser than that of normal people, if liquids such as saliva and washing water accumulated in the oral cavity are sucked with the same suction pressure as normal people, vacuum The tip of the instrument is more likely to stick to the patient's oral mucosa. Therefore, in the suction device according to the first embodiment, when the elderly mode is selected, the electropneumatic regulator 251 is used to lower the suction pressure than that of a normal person, thereby sucking liquid such as saliva and washing water accumulated in the oral cavity. can do.

FIG. 8 is a timing chart for explaining the operation of the elderly mode according to Embodiment 1 of the present invention. It should be noted that the timing of starting suction with the vacuum syringe 41 in the elderly mode in step S131 is the timing of time t0 shown in FIG. At time t0, the elderly mode SW is turned on, and subsequent suction by the vacuum syringe 41 is performed in the elderly mode. At time t1, the vacuum motor 300 is ON, the electro-pneumatic regulator 251 is ON, and the control valve A210 and control valve B220 are open (ON). Compared to the state at time t1 shown in FIG. 5, at time t1 shown in FIG. 8, the electropneumatic regulator 251 is in the ON state. is low compared to

The control unit 280 adjusts the electropneumatic regulator 251 so that the suction pressure of the suction duct becomes the suction pressure of a normal person (first suction pressure) (for example, turns it off). mode (normal mode), and the electropneumatic regulator 251 is adjusted so that the suction pressure of the suction duct is lower than the suction pressure of a normal person (second suction pressure) for the elderly (for example, the ON state ) and a control mode for elderly people (elderly person mode) can be controlled. When receiving information that the elderly mode switch is turned on, the controller 280 continues to operate in the elderly mode until the elderly mode off switch (not shown) is turned on. Of course, the control unit 280 may continue the elderly mode operation while the elderly mode SW is ON without providing the elderly mode OFF SW.

The control unit 280 determines that the sensor value (suction pressure) becomes greater than a predetermined value (threshold value) at the timing of time t2 shown in FIG. 8 (ON). However, since the suction avoidance process is not started during operation in the elderly mode, the control unit 280 closes the control valve A210 in order to stop the driving of sucking the liquid or the like from the tip of the vacuum syringe 41 when it is determined that the suction is performed. (OFF) is not performed.

Returning to FIG. 4, control unit 280 determines whether or not an operation to end the operation of the elderly mode has been received (step S132). For example, when a doctor, an assistant, or the like turns ON the elderly mode OFF SW, the control unit 280 determines that an operation to end the operation of the elderly mode has been received. If it is determined that an operation to terminate the operation of the elderly mode has been received (YES in step S132), control unit 280 terminates the operation of the elderly mode. If it is determined that an operation to end the operation of the elderly mode has not been received (NO in step S132), the control unit 280 returns the process to step S131 and continues the operation of the elderly mode. If the elderly mode is not selected (NO in step S130), control unit 280 returns the process to step S101.

As described above, the suction pressure control device of Embodiment 1 is a suction pressure control device that controls the suction pressure of the medical vacuum device 40 . The suction pressure control device has an input section to which a signal from a pressure sensor 250 for detecting the suction pressure of a suction pipe is input, to which the vacuum device 40 is connected on one side and to which the vacuum motor 300 that generates the suction pressure is connected on the other side. 45, and a control unit 280 for controlling the opening and closing of the valves (control valve A210, control valve B220, control valve C230) connected to the vacuum motor 300 or the suction line. When the suction pressure detected by the pressure sensor 250 is greater than a predetermined value, the control unit 280 controls opening and closing of the vacuum motor 300 or the valve to lower the suction pressure of the suction pipe. As a result, the suction pressure control device of the first embodiment can easily remove the tip of the vacuum device even if it sticks to the patient's oral mucosa.

The valves are a control valve A210 (first on-off valve) connected to the suction line 204 and a control valve C230 (second on-off valve) connected to the suction line 204 between the vacuum syringe 41 and the control valve A210. and including. When the suction pressure detected by the pressure sensor 250 is greater than a predetermined value, the control unit 280 closes the control valve A210 and then opens the control valve C230. As a result, the suction pressure of the suction lines 201 and 203 connected to the vacuum syringe 41 can be reduced.

When the suction pressure detected by the pressure sensor 250 with the control valve C230 open falls below a predetermined value, the control unit 280 preferably closes the control valve C230 and opens the control valve A210 within a predetermined time. Thereby, backflow to the vacuum syringe 41 can be prevented.

The valve may further include an electro-pneumatic regulator 251 that regulates the suction pressure in the suction line. The control unit 280 can set a plurality of control modes (for example, elderly mode) for the suction pressure of the suction duct, and adjusts the electropneumatic regulator 251 according to the control mode to control the suction pressure of the suction duct. may be adjusted. As a result, the control unit 280 can suck the liquid or the like from the tip of the vacuum syringe 41 with an optimum suction pressure depending on the situation.

The control unit 280 has a normal mode (first patient control mode) in which the electropneumatic regulator 251 is adjusted so that the suction pressure in the suction line becomes the first suction pressure, and a normal mode (first patient control mode) in which the suction pressure in the suction line becomes the first suction pressure. and a geriatric mode (second patient control mode) in which the electropneumatic regulator 251 is adjusted to a second suction pressure lower than the first suction pressure. When adjusting the suction pressure of the suction channel in the elderly mode, the valve is not controlled based on the suction pressure detected by the pressure sensor 250 . As a result, the control unit 280 can suck the liquid or the like from the tip of the vacuum syringe 41 with an optimal suction pressure for elderly people with loose oral mucosa.

The suction pressure control device for controlling the suction pressure of a medical vacuum instrument includes an input unit 45 for receiving a signal of selection information of a control mode selected by an operator (doctor, assistant, etc.), and a suction pipe line. and a control unit 280 that controls opening and closing of the electropneumatic regulator 251 that adjusts the suction pressure. The control unit 280 has a normal mode (first patient control mode) in which the electropneumatic regulator 251 is adjusted so that the suction pressure in the suction line becomes the first suction pressure, and a normal mode (first patient control mode) in which the suction pressure in the suction line becomes the first suction pressure. At least an elderly person mode (second patient control mode) in which the electropneumatic regulator 251 is adjusted to a second suction pressure lower than the first suction pressure can be set, and is input by the input unit 45. The control mode to be executed may be selected based on the received control mode selection information. As a result, the suction device controlled by the suction pressure control device may not include the pressure sensor 250 .

The suction device 200 includes a medical vacuum device 40, a suction channel having one end connected to the vacuum device 40, a pressure sensor 250 connected to the suction channel for detecting the suction pressure of the suction channel, and a suction tube. It includes a valve connected to the line, a vacuum motor 300 for generating suction pressure in the suction line, and a suction pressure controller.

A medical device (dental treatment device) 100 is connected to a medical vacuum device 40, a suction channel to which the vacuum device 40 is connected at one end, and the suction channel to detect the suction pressure of the suction channel. A pressure sensor, a valve connected to the suction line, a vacuum motor that generates the suction pressure in the suction line, a suction pressure control device, and the patient can be treated with the patient sitting or lying down. and a medical device body 10 (chair device).
<Embodiment 2>
In Embodiment 1 of the present invention, whenever the tip of the vacuum syringe 41 sticks to the patient's oral mucosa, adsorption avoidance processing is performed, and the tip of the vacuum syringe 41 sticking to the patient's oral mucosa can be easily peeled off. is controlled so that However, in Embodiment 1 of the present invention, even if the tip of the vacuum syringe 41 repeatedly sticks to the patient's oral mucosa, the suction pressure of the vacuum syringe 41 does not change. Therefore, in Embodiment 2 of the present invention, a configuration will be described in which the suction pressure of the vacuum syringe 41 is changed according to the number of times the tip of the vacuum syringe 41 sticks to the patient's oral mucosa. The medical device, the suction pressure control device, and the suction device according to the second embodiment are the same as the medical device 100, the suction pressure control device, and the suction device according to the first embodiment of the present invention shown in FIGS. It has the same configuration as the device 200, and the same reference numerals are given to the same configuration, and detailed description thereof will not be repeated.

FIG. 9 is a flow chart for explaining the operation of the suction device according to Embodiment 2 of the present invention. The operation of the suction device according to the second embodiment will be described with reference to FIG. First, the controller 280 causes the doctor, the assistant, or the like to pick up the vacuum syringe 41 from the instrument holder 2d and start suctioning with the vacuum syringe 41 (step S201). Also in the control according to the second embodiment, it is determined whether or not the use of the vacuum syringe 41 is selected (step S101) in the same manner as the control shown in FIG. (step S110), determination of whether the tube cleaning process has been selected (step S120), and determination of whether the elderly mode has been selected (step S130).

Specifically, in step S201, the control unit 280 turns on the start SWA 283, activates the vacuum motor 300, opens the control valve A210 and the control valve A210, and drives to suck liquid or the like from the tip of the vacuum syringe 41. to start.

In the suction device according to the second embodiment, when suction by the vacuum syringe 41 is started, suction avoidance processing is started. In the suction avoidance process, the controller 280 first acquires a sensor value (suction pressure) from the pressure sensor 250 (step S202). Here, the sensor value of the pressure sensor 250 is a predetermined value (threshold value) or less when liquid such as saliva or wash water accumulated in the oral cavity of the patient is sucked. When the tip of the syringe 41 is sucked, it rapidly increases and exceeds a predetermined value (threshold).

The control unit 280 determines whether or not the tip of the vacuum syringe 41 sticks to the patient's oral mucosa based on whether or not the sensor value (suction pressure) acquired from the pressure sensor 250 is greater than a predetermined value (threshold value) ( step S203). If the sensor value (suction pressure) is equal to or less than the predetermined value (threshold) (NO in step S203), the control unit 280 returns the process to step S202. When the sensor value (suction pressure) exceeds a predetermined value (threshold value) (YES in step S103), the control unit 280 stops driving the suction of the liquid or the like from the tip of the vacuum syringe 41 (step S204).

Next, the control unit 280 starts counting the time counter (T-CNT) in order to maintain the suction stop state of step S204 (step S205). The control unit 280 determines whether the count of the time counter (T-CNT) is longer than a predetermined time (step S206). If the count of the time counter (T-CNT) is less than or equal to the predetermined time (NO in step S206), control unit 280 returns the process to step S204. Here, the predetermined time is the time during which the suction pressure of the suction ducts 201 and 203 can be released sufficiently so that the tip of the vacuum syringe 41 sticking to the patient's oral mucosa can be easily peeled off. , and the time during which backflow to the vacuum syringe 41 can be prevented. Let the predetermined time be, for example, about 0.5 seconds.

If the count of the time counter (T-CNT) is longer than the predetermined time (YES in step S206), the count of the number counter (CNT) for counting the number of adsorption avoidance processes is started (step S207). The control unit 280 determines whether or not the count of the number counter (CNT) is greater than a predetermined number (step S208). If the count of the number counter (CNT) is equal to or less than the predetermined number (NO in step S208), control unit 280 returns the process to step S201. Here, the predetermined number of times is the number of times the suction avoidance process is performed so that the tip of the vacuum syringe 41 sticking to the patient's oral mucosa can be easily peeled off, and is, for example, about five times. If the tip of the vacuum syringe 41 sticks to the oral mucosa five times for the same patient, it is necessary to determine that the patient's oral mucosa is loose and reduce the suction pressure. Therefore, the number counter (CNT) resets the number of times it has been counting when the patient changes.

If the count of the number counter (CNT) is greater than the predetermined number (YES in step S208), the controller 280 uses the electropneumatic regulator 251 to perform pressure reduction control to reduce the suction pressure of the vacuum syringe 41 (step S209). The control unit 280 sucks liquid such as saliva and cleansing water accumulated in the patient's oral cavity with the suction pressure of the vacuum syringe 41 controlled to reduce pressure in step S209. However, if the patient changes, the control unit 280 cancels the pressure reduction control and restores the original suction pressure of the vacuum syringe 41 .

Next, the control unit 280 determines whether or not an operation to end the suction by the vacuum syringe 41 has been received (step S210). For example, the control unit 280 determines that an operation to end the suction by the vacuum syringe 41 has been received when the doctor, the assistant, or the like has turned the start SWA 283 to the OFF state. When determining that an operation to end the suction has been received (YES in step S210), the control unit 280 ends the suction with the vacuum syringe 41. FIG. Note that the suction avoidance process refers to the process surrounded by the dashed lines in FIG. 9 in steps S202 to S209.

If it is determined that the operation to end the suction has not been received (NO in step S210), the control unit 280 returns the process to step S201 and continues the driving of sucking the liquid or the like from the tip of the vacuum syringe 41. When continuing the drive for sucking the liquid or the like from the tip of the vacuum syringe 41, control is performed to close (OFF) the control valve C230 and open (ON) the control valve A210. Since the determination in step S210 is made in a short period of time, if the end of suction is not accepted, the state of suction is immediately restored. The controller 280 can prevent backflow to the vacuum syringe 41 by shortening the recovery time. Further, the control unit 280 preferably controls the valves in the order of closing (OFF) the control valve C230 and opening (ON) the control valve A210.

As described above, in the suction pressure control device of the second embodiment, when the suction pressure detected by the pressure sensor 250 exceeds a predetermined value and the number of times the valve is controlled is equal to or greater than a predetermined number of times, the suction pipe From the initial control mode in which the electropneumatic regulator 251 is adjusted so that the suction pressure of the suction channel becomes the initial suction pressure, the electropneumatic regulator 251 is operated so that the suction pressure of the suction channel becomes lower than the initial suction pressure. Change to the low pressure control mode to be adjusted (depressurization control). As a result, the suction pressure control device according to the second embodiment can suction liquid such as saliva and washing water accumulated in the oral cavity of the patient from the tip of the vacuum syringe 41 with a suction pressure suitable for the patient.
<Modification>
(1) The medical device 100 according to Embodiments 1 and 2 of the present invention is assumed to be a stationary device configured with a diagnostic device main body 10, a spittoon 2, etc., as shown in FIG. However, even when a doctor visits a patient's home, a vacuum device is required for sucking liquid such as saliva and washing water accumulated in the oral cavity. Therefore, a modified example of a suction pressure control device capable of performing suction avoidance processing or a medical device for home visit including a suction device will be described.

FIG. 10 is a block diagram schematically showing the configuration of a medical device 500 in a modification of the invention. The medical device 500 includes a control valve A 210 , a release valve 252 , a vacuum tank 260 and a vacuum motor 300 inside a housing 501 . In the medical device 500 according to this modified example, the same components as those of the medical device 100, suction pressure control device, and suction device 200 according to Embodiment 1 of the present invention shown in FIGS. 1 to 3 are denoted by the same reference numerals. , and the detailed description will not be repeated. Note that the medical device 500 also includes the controller 280 shown in FIG.

The medical device 500 has a suction line 201 that connects a vacuum syringe 41 via a suction tube 44 . The vacuum tank 260 has a container, and an inlet port connecting the suction pipe line 201 and an exhaust port connecting the suction pipe line 204 leading to the vacuum motor 300 are provided in the upper part of the container. It should be noted that the vacuum tank 260 included in the medical device 500 for home visit does not have a drainage port for connection to a drainage pipeline, and it is necessary to dispose of the collected liquid in the drainage port.

The suction pressure pilot line 207 is provided with a release valve 252 that opens when the pressure exceeds a predetermined value. Also in the medical device 500, instead of the release valve 252, the pressure sensor 250 and the electropneumatic regulator 251 may be provided.

Next, FIG. 11 is a timing chart for explaining the operation of the medical device 500 in the modified example of the present invention. The timing at which the drive for sucking the liquid or the like from the tip of the vacuum syringe 41 is started is the timing of time t1 shown in FIG. At time t1, the pickup sensor A281 is ON, the start SWA 283 is ON, the vacuum motor 300 is ON, and the control valve A210 is open (ON). The medical device 500 is provided with a holder (not shown in FIG. 10) for holding the vacuum syringe 41, and the holder includes the pickup sensor A281.

At the timing of time t2 shown in FIG. 11, the control unit 280 opens the valve (ON) when the pressure applied to the release valve 252 becomes greater than a predetermined pressure (for example, the threshold shown in FIG. 4). When the control unit 280 determines that the release valve 252 is open and suction is performed, the control valve A210 is closed (OFF) in order to stop the driving of sucking the liquid or the like from the tip of the vacuum syringe 41 at time t3. By closing (OFF) the control valve A210, the suction pressure of the vacuum motor 300 is cut off from the suction pipes 201 and 203. By closing the control valve A210, the tip of the vacuum syringe 41 sticking to the patient's oral mucosa can be easily peeled off.

At time t3, the control valve A210 is closed (OFF) and the control valve C230 is opened (ON) at the same time. It is preferred to control the valves in order of opening (ON). In FIG. 5, a period is provided from after the timing of time t2 to the timing of time t3, but timing of time t3 may be started immediately after the timing of time t2.

When continuing the driving of sucking the liquid or the like from the tip of the vacuum syringe 41, the control unit 280 controls the opening (ON) of the control valve A210 as shown at the timing of time t4 shown in FIG. Backflow to the vacuum syringe 41 can be prevented by opening (ON) the control valve A210 within a predetermined time. Note that the medical device 500 in the modification is an example, and the configuration described in the medical device 100 according to Embodiments 1 and 2 of the present invention can be appropriately provided in the medical device 500 . Even the medical device 500 for home visits may be provided with suction avoidance processing with high functionality equivalent to that of a chair unit such as the medical device 100 .

As described above, the home visit medical apparatus 500 of the present modified example includes a housing 501 that can be carried by an operator when making a home visit, a medical vacuum device 40, and the vacuum device 40 is connected to one end. a suction duct, a pressure sensor (e.g., release valve 252) connected to the suction duct and detecting the suction pressure of the suction duct, a valve connected to the suction duct, and provided in the housing 501, It includes a vacuum motor 300 that generates a suction pressure in the suction pipe and a suction pressure control device provided in the housing 501 .

(2) In the above embodiment, it was explained that the control unit 280 can switch between the normal mode and the elderly mode, but the present invention is not limited to this. For example, other control modes such as child mode and female mode may be provided. Control may be performed so that the suction pressure of the vacuum syringe 41 differs for each control mode.

(3) In the above-described embodiment, it was explained that the suction pressure of the vacuum syringe 41 is reduced when the number of suction avoidance processes for the same patient exceeds the predetermined number. However, the present invention is not limited to this, and the suction pressure of the vacuum syringe 41 may be reduced in stages as the number of suction avoidance processes for the same patient increases.

(4) In the above-described embodiment, the suction pressure of the vacuum device 40 is changed by controlling the valve, but the drive of the vacuum motor 300 may be controlled to change the suction pressure of the vacuum device 40 .

(5) In the above-described embodiment, the controller 280 determines whether the sensor value (suction pressure) acquired from the pressure sensor 250 is greater than a predetermined value (threshold value), and the tip of the vacuum syringe 41 is detected by the patient's oral mucosa. However, whether the tip of the vacuum syringe 41 sticks to the patient's oral mucosa is determined by whether the sensor value (suction pressure) obtained from the pressure sensor 250 is equal to or greater than a predetermined value (threshold value). You can decide whether or not

It should be considered that the embodiments disclosed this time are illustrative in all respects and not restrictive. The scope of the present invention is indicated by the scope of the claims rather than the above description, and is intended to include all modifications within the meaning and range of equivalents of the scope of the claims.

REFERENCE SIGNS LIST 1 examination table 2 spittoon 3 lighting device 4 lighting device arm 5 tray table 6 tray table arm 10 diagnostic device body 10b handpiece control block 20 medium conduit 30 medical handpiece 40 vacuum Instrument 41 Vacuum Syringe 42 Saraeva Syringe 43 Display Part 44 Suction Tube 45 Input Part 100,500 Medical Device 200 Suction Device 201, 202, 203, 204, 206 Suction Line 205 Drain Pipe 207 suction pressure pilot line 250 pressure sensor 251 electropneumatic regulator 252 release valve 260 vacuum tank 270 vacuum cleaning tank 280 controller 300 vacuum motor 501 housing.

Claims (9)

A suction pressure control device for controlling the suction pressure of a medical vacuum instrument,
an input unit for receiving a signal from a pressure sensor that detects the suction pressure of a suction pipe line, one of which is connected to the vacuum device and the other of which is connected to a vacuum motor that generates suction pressure;
a control unit that controls opening and closing of a valve connected to the vacuum motor or the suction line,
The valve includes a pressure regulating valve that adjusts the suction pressure of the suction line,
The control unit
A first patient control for adjusting the pressure regulating valve so that the suction pressure of the suction duct becomes a first suction pressure among a plurality of control modes for the suction pressure of the suction duct can be set. setting at least a mode and a second patient control mode in which the pressure regulating valve is adjusted such that the suction pressure in the suction line is a second suction pressure lower than the first suction pressure;
when the suction pressure detected by the pressure sensor is greater than a predetermined value, controlling opening and closing of the vacuum motor or the valve to reduce the suction pressure of the suction pipe;
Adjusting the suction pressure in the suction line by adjusting the pressure regulating valve according to the control mode, wherein when adjusting the suction pressure in the suction line in the second patient control mode, the pressure A suction pressure control device that does not control the valve based on the suction pressure detected by a sensor The valve includes a first on-off valve connected to the suction line, and a second on-off valve connected to the suction line between the vacuum device and the first on-off valve,
2. The suction pressure control device according to claim 1, wherein when the suction pressure detected by said pressure sensor is greater than a predetermined value, said control unit closes said first on-off valve and then opens said second on-off valve. The control unit closes the second on-off valve within a predetermined recovery time and closes the first on-off valve when the suction pressure detected by the pressure sensor becomes equal to or less than a predetermined value while the second on-off valve is open. 3. The suction pressure control device of claim 2, open. The control unit
When the suction pressure detected by the pressure sensor is greater than a predetermined value and the number of times the valve is controlled is equal to or greater than the predetermined number of times,
From the initial control mode in which the pressure regulating valve is adjusted so that the suction pressure in the suction line becomes the initial suction pressure,
4. The control mode of any one of claims 1 to 3 , wherein the control mode is changed to a low pressure control mode in which the pressure regulating valve is adjusted so that the suction pressure of the suction pipe is lower than the initial suction pressure. Suction pressure control device. A suction pressure control device for controlling the suction pressure of a medical vacuum instrument,
an input unit into which a signal of selection information of a control mode selected by an operator is input;
a control unit that controls opening and closing of a pressure regulating valve that adjusts the suction pressure of the suction duct,
The control unit
a first patient control mode in which the pressure regulating valve is adjusted such that the suction pressure in the suction line is a first suction pressure; and the suction pressure in the suction line is less than the first suction pressure. setting at least a second patient control mode that adjusts the pressure regulating valve to a second suction pressure;
A suction pressure control device that selects a control mode to be executed based on control mode selection information input by the input unit. said vacuum device for medical use;
a suction pipe having one end connected to the vacuum device and the other end connected to a vacuum motor for generating suction pressure;
a pressure sensor connected to the suction line and detecting the suction pressure of the suction line;
a valve connected to the suction line;
the vacuum motor that generates suction pressure in the suction conduit;
A suction device comprising the suction pressure control device according to any one of claims 1 to 5 . said vacuum device for medical use;
a suction conduit having one end connected to the vacuum device;
a pressure sensor connected to the suction line and detecting the suction pressure of the suction line;
a valve connected to the suction line;
a vacuum motor that generates a suction pressure in the suction conduit;
The suction pressure control device according to any one of claims 1 to 5 ;
A dental treatment apparatus, comprising: a chair apparatus that allows treatment with a patient sitting or with the patient lying down. a housing that can be carried by an operator when making a home visit;
said vacuum device for medical use;
a suction conduit having one end connected to the vacuum device;
a pressure sensor connected to the suction line and detecting the suction pressure of the suction line;
a valve connected to the suction line;
a vacuum motor that is provided in the housing and generates a suction pressure in the suction pipe;
A dental treatment apparatus for home visits, comprising the suction pressure control device according to any one of claims 1 to 5 , which is provided in the housing. A suction pressure control device for controlling the suction pressure of a medical vacuum instrument,
an input unit for receiving a signal from a pressure sensor that detects the suction pressure of a suction pipe line, one of which is connected to the vacuum device and the other of which is connected to a vacuum motor that generates suction pressure;
a control unit that controls opening and closing of a valve connected to the vacuum motor or the suction line,
The valve includes a pressure regulating valve that adjusts the suction pressure of the suction line,
The control unit
In the case of the control mode for the first patient in which the suction pressure is adjusted to the first suction pressure by controlling the opening and closing of the vacuum motor or the pressure regulating valve, the suction pressure detected by the pressure sensor is When it is larger than the predetermined value, the opening and closing of the valve is controlled to lower the suction pressure of the suction line,
In the case of a second patient control mode in which opening and closing of the vacuum motor or the pressure regulating valve is controlled to adjust the suction pressure to a second suction pressure lower than the first suction pressure, A suction pressure control device that does not control the opening and closing of the valve based on the suction pressure detected by the pressure sensor.

Images