Medical device, and cleaning method

Abstract

To provide a medical device and a cleaning method that can reduce the work of cleaning the interior of an additional water supply pipeline.SOLUTION: A medical device 100 is a medical device for dentistry. The medical device 100 comprises: a water supply pipeline that supplies water to a dental Instrument 30; a plurality of valves 40 that are arranged in the water supply pipeline and change the flow of water; an attachment / detachment part 1g that connects a first branch water supply pipeline 52 and a supply channel 21b by attaching one end of the supply channel 21b (additional supply pipeline) in which a dental scaler 31 is attached to the other end; a cleaning device 110 which supplies cleaning fluid to the water supply pipeline; and a control unit 160 that controls opening / closing of multiple valves. The control unit 160 controls opening / closing of the multiple valves so that the cleaning device 110 supplies the cleaning fluid to the supply channel 21b when one end of the supply channel 21b is attached to the attachment / detachment part 1g.SELECTED DRAWING: Figure 7

Description

Technical Field

[0001] The present disclosure relates to a medical device and a cleaning method.

Background Art

[0002] As an example of a medical device, in a dental treatment device, water is supplied to a dental instrument via a water supply line. The water supplied via the water supply line is used, for example, to spray the cutting portion of the teeth in the oral cavity from the dental instrument. After use of the dental instrument, water remains in the water supply line. If water remains in the water supply line for a long time, various bacteria will grow in the water supply line, so it is required to clean the inside of the water supply line.

[0003] For example, Japanese Patent No. 4348075 (Patent Document 1) describes a dental treatment device that cleans a supply line (water supply line) by flowing a treatment solution added with a bactericide through the supply line.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In a dental treatment device, in addition to the dental instruments that are pre-mounted on the treatment device main body, there are also dental instruments that are mounted on the treatment device main body when in use. Water is supplied to the additionally mounted dental instruments via an additional water supply line, and after use, water remains in the additional water supply line, so it is required to clean the inside of the additional water supply line. However, cleaning the inside of the additional water supply line was complicated, such as the need to confirm that one end of the additional supply line was mounted on the treatment device main body.

[0006] The present disclosure has been made in view of the above problems, and an object thereof is to provide a medical device and a cleaning method capable of reducing the work of cleaning the inside of an additional water supply pipe.

Means for Solving the Problems

[0007] The medical device of the present disclosure is a dental medical device. The medical device includes a supply pipe that supplies water to a dental instrument, a plurality of valves disposed in the supply pipe that change the flow of water, and one end of an additional supply pipe connected to the dental instrument to the other end a detachable part that connects to the is water supply pipe to a cleaning device that supplies a cleaning liquid to the supply pipe, and a control unit that controls the opening and closing of the plurality of valves. The control unit a detection unit that detects that one end of the additional supply pipeline is attached to the detachable part; controls the opening and closing of the plurality of valves so that the cleaning liquid is supplied from the cleaning device to the additional supply pipe when needed. when it is detected that one end of the additional supply pipeline is attached to the detachable part In this case, the opening and closing of the plurality of valves are controlled so that the cleaning liquid is supplied from the cleaning device to the additional supply pipe.

[0008] The cleaning method of the present disclosure is a cleaning method for cleaning a pipeline of a dental medical device including a supply pipe that supplies water to a dental instrument, a plurality of valves disposed in the supply pipe that change the flow of water, and one end of an additional supply pipe connected to the dental instrument to the other end a detachable part that connects to the is water supply pipe to a cleaning device that supplies a cleaning liquid to the supply pipe, and a control unit that controls the opening and closing of the plurality of valves. The cleaning method includes a detection unit that detects that one end of the additional supply pipeline is attached to the detachable part; a step of, and the detection unit detects that one end of the additional supply pipeline is attached to the detachable part when one end of the additional supply pipe is attached to the detachable part by the detection unit a step of controlling the opening and closing of the plurality of valves so that the cleaning liquid is supplied from the cleaning device to the additional supply pipe. and detects that Including.

Advantages of the Invention

[0009] According to the present disclosure, when one end of the additional supply pipe is attached to the detachable part, the opening and closing of the plurality of valves are controlled so that the cleaning liquid is supplied from the cleaning device to the additional supply pipe. Therefore, the work of cleaning the inside of the additional water supply pipe can be reduced.

Brief Description of the Drawings

[0010]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Embodiments for Carrying Out the Invention

[0011] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. First, the configuration of a medical device in an embodiment of the present disclosure will be described. In this embodiment, a dental treatment device will be described as an example of a medical device.

[0012] FIG. 1 is a perspective view schematically showing the configuration of a medical device 100 according to an embodiment of the present disclosure. The medical device 100 includes a medical device main body 10, a medium conduit 20, and a dental instrument 30. The medium conduit 20 and the dental instrument 30 constitute an instrument set. The instrument set is configured to be detachably connected to the medical device main body 10.

[0013] The medical device main body 10 includes an examination table 1, a spittoon 2, a lighting device 3, an arm for the lighting device 4, a treatment table 5, and an arm for the treatment table 6. The examination table 1 is configured such that a patient can receive medical treatment while sitting or lying supine. The examination table 1 includes a base 1a, a seat plate 1b, a backrest 1c, a headrest 1d, and an armrest 1e. The seat plate 1b is installed on the base 1a so as to be movable up and down. The backrest 1c is attached to one end of the seat plate 1b so as to be able to rise and fall. Note that the backrest 1c may be configured to store the dental instrument 30 (see FIG. 2(a)). The headrest 1d is attached to the upper end of the backrest 1c so as to be tiltable. The armrest 1e is installed on the side of the seat plate 1b.

[0014] The spittoon 2 is installed on the side of the examination table 1. The spittoon 2 includes a body 2a, a basin 2b, and a cup faucet 2c. The basin 2b is installed at the upper end of the body 2a. A water supply cylinder extending from the cup faucet 2c is installed in the basin 2b. The lighting device 3 is connected to the spittoon 2 via the arm for the lighting device 4. The lighting device 3 is, for example, a shadowless lamp.

[0015] The treatment table 5 is connected to the base 1a via the arm for the treatment table 6. The treatment table 5 is used to place and hold medical instruments, drugs, and the dental instrument 30 (treatment handpiece). In addition, the treatment table 5 includes an operation setting unit 5a for setting operations of the examination table 1 and the dental instrument 30 and the like.

[0016] The dental instrument 30 includes, for example, an air turbine handpiece (high-speed handpiece) 32, a micromotor handpiece (low-speed handpiece) 33, a three-way syringe 34, and the like. These dental instruments 30 are locked to the doctor-side handpiece holder 5b provided on the treatment table 5. Note that the spit bowl 2 is provided with an assistant-side handpiece holder 2d, and a vacuum syringe or the like is locked thereto.

[0017] The dental instrument 30 is connected to the medical device main body 10 in advance (for example, at the time of manufacture or installation) via the medium conduit 20. Specifically, the dental instrument 30 locked to the doctor-side handpiece holder 5b is connected to the medical device main body 10 by the medium conduit 20 extending from the lower part of the treatment table 5, and the dental instrument 30 locked to the assistant-side handpiece holder 2d is connected to the medical device main body 10 by the medium conduit extending from the side surface of the spit bowl 2.

[0018] In addition to the instruments such as the air turbine handpiece 32 that are pre-connected to the medical device main body 10, there are also dental instruments that are attached to the medical device main body when in use. FIG. 2 is a schematic diagram showing an example of the attachment / detachment part 1g for additionally attaching the dental instrument 30. On the examination table 1, as shown in FIG. 2(a), a lid 1f is provided at the lower part of the back plate 1c, and the lid 1f can be opened in the direction of the arrow. When the lid 1f is opened, the examination table 1 is provided with an attachment / detachment part 1g for additionally attaching the dental instrument 30, as shown in FIG. 2(b).

[0019] By inserting the adapter 21e provided at the end of the medium conduit 21 extending from the additional dental instrument 30 into the attachment / detachment part 1g, the additional dental instrument 30 can be attached to the medical device main body. When removing the additional dental instrument 30 from the medical device main body, pull out the adapter 21e from the attachment / detachment part 1g while pressing the removal button 21f provided on the adapter 21e.

[0020] In the treatment table 1 shown in FIG. 2, a dental instrument 30 (for example, an air turbine handpiece 32A, a three-way syringe 34A, etc.) can be stored in the upper part of the back plate 1c, and a detachable part 1g for additionally mounting the dental instrument 30 is provided in the lower part of the back plate 1c. Of course, the treatment table 1 may be configured to lock the dental instrument 30 to the handpiece holder 5b instead of the upper part of the back plate 1c as shown in FIG. 1. Even in this case, the treatment table 1 has a detachable part 1g for additionally mounting the dental instrument 30 in the lower part of the back plate 1c.

[0021] FIG. 3 is a schematic view showing an example of a dental instrument to be additionally mounted. The dental instrument 30 to be added is a dental scaler 31 as shown in FIG. 3. The dental scaler 31 is an instrument for reliably and efficiently removing supra-gingival calculus and sub-gingival calculus in periodontal treatment. The dental scaler 31 includes an ultrasonic scaler that ultrasonically vibrates the tip with a piezoelectric element or the like, and an air scaler that vibrates the tip with compressed air. When the dental scaler 31 is an air scaler, a pipeline for supplying air is required. Whether the dental scaler 31 is an ultrasonic scaler or an air scaler, it can be water-injected from the tip for cooling the heat generated during use and flushing the removed chips out of the pocket.

[0022] FIG. 4 is a cross-sectional perspective view of a medium conduit used for a dental instrument to be additionally attached. Referring to FIGS. 3 and 4, the medium conduit 21 is configured to supply working media such as electricity, air, and water from the medical device main body 10 to the dental scaler 31. The medium conduit 21 has flexibility. The medium conduit 21 is provided with an engaging portion 21X at the tip for engaging with the dental scaler 31. The medium conduit 21 includes an outer casing 21a, a supply conduit 21b (additional supply conduit) for supplying water, a discharge conduit 21c (additional discharge conduit) for discharging water, and an air supply conduit 21d (additional air supply conduit) for supplying driving air. Although not shown in FIG. 4, the medium conduit 21 also includes wiring for supplying electricity to the dental scaler 31.

[0023] In the medium conduit 21 of the dental scaler 31, the discharge conduit 21c is provided so that the conduit can be cleaned without setting the dental scaler 31 in the basin 2b. Of course, if the dental scaler 31 is set in the basin 2b and the conduit is cleaned, the discharge conduit 21c may not be provided in the medium conduit 21. The outer casing 21a has a tubular shape. The supply conduit 21b, the discharge conduit 21c, and the air supply conduit 21d are arranged inside the outer casing 21a. The material of the outer casing 21a is, for example, silicone. Each of the supply conduit 21b, the discharge conduit 21c, and the air supply conduit 21d has, for example, a two-layer structure. The material of the inner layer of this two-layer structure is a fluororesin, and the material of the outer layer is urethane.

[0024] One end of the supply pipe 21b is attached to the detachable part 1g shown in Fig. 2(a) to connect to the supply pipe in the medical device main body 10, and water can be supplied to the dental scaler 31 connected to the other end. Also, one end of the discharge pipe 21c is attached to the detachable part 1g shown in Fig. 2(a) to connect to the discharge pipe in the medical device main body 10, and water can be discharged from the dental scaler 31 connected to the other end. Note that the supply pipe 21b and the discharge pipe 21c are connected via a valve in the vicinity of the dental scaler 31 as will be described later. One end of the air supply pipe 21d is attached to the detachable part 1g shown in Fig. 2(a) to connect to the air supply pipe in the medical device main body 10, and air can be supplied to the dental scaler 31 connected to the other end.

[0025] Next, the medium conduit 20 connected to the dental instrument 30 such as the air turbine handpiece 32 will be described. Fig. 5 is a perspective view schematically showing the treatment table 5 shown in Fig. 1, the medium conduit 20, and the dental instrument 30. Fig. 6 is a cross-sectional perspective view of the medium conduit 20 used for the dental instrument 30 shown in Fig. 5. The medium conduit 20 is configured to supply working media such as electricity, air, and water from the medical device main body 10 to the dental instrument 30. In Fig. 5, for clarity, one medium conduit 20 and one dental instrument 30 are shown. Also, in Fig. 5, for convenience of explanation, a state where the dental instrument 30 is removed from the medium conduit 20 is shown.

[0026] The medium conduit 20 is connected to the medical device main body 10 and the dental instrument 30. Specifically, a part of the plurality of medium conduits 20 connects the saliva ejector 2 and the dental instrument 30, and the doctor-side handpiece holder 5b forming the other part of the plurality of medium conduits 20 is arranged below the treatment table 5 and connects the treatment table 5 and the dental instrument 30. Further, the medium conduit 20 has flexibility. The medium conduit 20 is provided with an engaging portion 20X at the tip for engaging with the dental instrument 30. As shown by the arrow in FIG. 5, the engaging portion 20X is inserted into the dental instrument 30 from one end of the dental instrument 30 into the interior of the dental instrument 30. In this way, the medium conduit 20 is detachably connected to the dental instrument 30.

[0027] Referring to FIGS. 5 and 6, the air turbine handpiece will be described as an example. The dental instrument 30 has a function of injecting water to a heat-generating portion to suppress heat generated when cutting the ivory, which is the enamel of the tooth, and a function of blowing dust by injecting water or the like. The medium conduit 20 includes an exterior 20a, a supply conduit 20b for supplying water, a discharge conduit 20c for discharging water, an air supply conduit 20d for supplying driving air, and an exhaust conduit 20f for exhausting driving air.

[0028] In the medium conduit 20 of the dental instrument 30, a discharge conduit 20c is provided so that the conduit can be cleaned without setting the dental instrument 30 in the basin 2b. Of course, if the configuration is such that the dental instrument 30 is set in the basin 2b for conduit cleaning, the discharge conduit 20c need not be provided in the medium conduit 20. The exterior 20a has a tubular shape. Inside the exterior 20a, a supply conduit 20b, a discharge conduit 20c, an air supply conduit 20d, and an exhaust conduit 20f are arranged. The material of the exterior 20a is, for example, silicone. Each of the supply conduit 20b, the discharge conduit 20c, the air supply conduit 20d, and the exhaust conduit 20f has, for example, a two-layer structure. The material of the inner layer of this two-layer structure is a fluororesin, and the material of the outer layer is urethane. In an air turbine handpiece, it is essential to provide an air supply conduit for supplying driving air and an exhaust conduit for exhausting driving air. However, in a micromotor handpiece, an ultrasonic handpiece, etc., an exhaust conduit is not necessary.

[0029] Next, the conduits and device configuration of the medical device 100 will be described. FIG. 7 is a diagram schematically showing the conduit configuration of the medical device 100 in an embodiment of the present disclosure. FIG. 8 is a control block diagram of the medical device 100 in an embodiment of the present disclosure. The medical device 100 further includes a valve 40 for controlling the medium flowing through the conduits. The valve 40 is configured to allow water to flow from the supply conduits 20b and 21b that supply water, through the dental instrument 30 and the discharge conduits 20c and 21c that discharge water, to any one of the medical device main bodies 10. The valve 40 may be arranged inside the medium conduits 20 and 21, or may be arranged inside the dental instrument 30. Further, the valve 40 may be separately arranged in at least any one of the medium conduits 20 and 21, the dental instrument 30, and the medical device main body 10.

[0030] In this embodiment, the valve 40 includes supply on-off valves 40a and 41a, supply pipeline on-off valves 40b and 41b, and a discharge on-off valve 40c. The supply on-off valves 40a and 41a, the supply pipeline on-off valves 40b and 41b, and the discharge on-off valve 40c may each be a solenoid valve. The supply on-off valves 40a and 41a are arranged between the main water supply pipeline (medium supply section) 51 connecting from the water source (tap water) 50a in the medical device main body 10 to the dental instrument 30 and the supply pipelines 20b and 21b for supplying water to the medium conduits 20 and 21. The supply pipeline on-off valve 40b is arranged between the connection portion of the supply pipeline 20b for supplying water to which the discharge pipeline 20c for discharging the water in the medium conduit 20 is connected and the dental instrument 30. The supply pipeline on-off valve 40b is preferably provided at the engagement portion 20X (connection portion) of the medium conduit 20 with the dental instrument 30.

[0031] The supply on-off valve 41a (additional supply on-off valve) is arranged between the main water supply pipeline 51 connecting from the water source 50a in the medical device main body 10 to the dental scaler 31 and the supply pipeline 21b. The supply pipeline on-off valve 41b (additional supply pipeline on-off valve) is arranged between the connection portion of the supply pipeline 21b (additional supply pipeline) for supplying water to which the discharge pipeline 21c (additional discharge pipeline) for discharging the water in the medium conduit 21 is connected and the dental scaler 31. The supply pipeline on-off valve 41b is preferably provided at the engagement portion 21X (connection portion) of the medium conduit 21 with the dental scaler 31. The discharge on-off valve 40c is arranged between the drainage section (medium discharge section) 140 and the discharge pipelines 20c and 21c for discharging the water in the medium conduits 20 and 21. The branch portion of the supply pipelines 20b and 21b and the discharge pipelines 20c and 21c is provided immediately upstream of the supply pipeline on-off valves 40b and 41b arranged in the medium conduits 20 and 21.

[0032] The medical device 100 is configured to discharge the water in the medium conduits 20 and 21a from the supply conduits 20b and 21b through the discharge conduits 20c and 21c to the drainage section 140 of the medical device main body 10 by opening the supply on-off valves 40a and 41a, closing the supply conduit on-off valves 40b and 41b, and opening the discharge on-off valve 40c. Instead of the supply conduit on-off valve 40b, an on-off valve provided in a dental instrument 30 (for example, a three-way syringe 34) may be used.

[0033] Further, the medical device 100 is configured to control the opening and closing of the supply on-off valves 40a and 41a and the supply conduit on-off valves 40b and 41b provided on each handpiece side to supply water from the water source (tap water) 50a to each handpiece via the supply conduits 20b and 21b.

[0034] Furthermore, with reference to FIG. 7, the conduit configuration of the medical device 100 according to the present embodiment will be described. In FIG. 7, the conduit configuration in a state where one end (adapter 21e) of the medium conduit 21 of the dental scaler 31 is attached to the attachment / detachment section 1g of the medical device main body 10 is illustrated.

[0035] The medical device main body 10 includes a water supply conduit 50 (including the supply conduits 20b and 21b), an air supply conduit 60 (including the air supply conduit 20d), a drainage conduit 70 (including the discharge conduits 20c and 21c), a cleaning device 110, a flow meter 120, a basin 2b, a drainage section 140, a control section 160, a water temperature detection sensor 168, and a water quality monitoring detector 170.

[0036] The water supply pipe 50 includes a main water supply pipe 51, a first branch water supply pipe 52 that supplies water to the dental scaler 31, a second branch water supply pipe 53 that supplies water to the air turbine handpiece 32, a third branch water supply pipe 54 that supplies water to the micromotor handpiece 33, a fourth branch water supply pipe 55 that supplies water to the three-way syringe 34, and a fifth branch water supply pipe 56 that supplies water to the cup faucet 2c. The first branch water supply pipe 52, the second branch water supply pipe 53, the third branch water supply pipe 54, the fourth branch water supply pipe 55, and the fifth branch water supply pipe 56 branch off from the main water supply pipe 51 respectively. Note that the fourth branch water supply pipe 55 can preferably supply more water compared to the first branch water supply pipe 52, the second branch water supply pipe 53, the third branch water supply pipe 54, etc.

[0037] The main water supply pipe 51 is connected to the water source (tap water) 50a of the water for medical treatment. The main water supply pipe 51 is provided with a manual main valve 51a, a water supply source solenoid valve 51b, a sterilization filter 51c, a flow meter 120, a water heater tank 51d, etc. in order from the upstream side. The main water supply pipe (medium supply unit) 51 is configured to supply water to the supply pipes 20b, 21b of the medium conduits 20, 21.

[0038] A flow meter 120 is attached to the main water supply pipe 51. The flow meter 120 is for measuring the flow rate of the water flowing through the main water supply pipe 51. The flow meter 120 is arranged on the downstream side of the connection part between the main water supply pipe 51 and the cleaning device 110.

[0039] Also, a water quality monitoring detector 170 is attached to the main water supply pipe 51. The water quality monitoring detector 170 is a detector for monitoring the water quality of the water staying in at least any one of the medical device main body 10 and the supply pipes 20b, 21b that supply water. Therefore, the water quality monitoring detector 170 may be attached to the discharge pipes 20c, 21c that discharge the water of the medium conduits 20, 21. The supply on-off valves 40a, 41a and the supply pipe on-off valves 40b, 41b may be configured to automatically operate according to the output of the water quality monitoring detector 170.

[0040] Furthermore, a water temperature detection sensor 168 is attached to the main water supply pipe 51. The water temperature detection sensor 168 is for detecting the temperature of the water supplied from the main water supply pipe 51 to the supply pipes 20b and 21b. The water temperature detection sensor 168 is provided at a position before the supply pipes 20b and 21b branch. Thereby, it is not necessary to provide the water temperature detection sensor 168 in each of the supply pipes 20b and 21b, and the water temperature detection sensor 168 can collectively detect the temperature of the water supplied to each of the supply pipes 20b and 21b.

[0041] The first branch drain pipe 72 of the dental scaler 31, the second branch drain pipe 73 of the air turbine handpiece 32, and the third branch drain pipe 74 of the micromotor handpiece 33 merge into a drain pipe 70 and are drained from the first main drain pipe 71 to the basin 2b through the discharge on-off valve 40c (main tube flushing solenoid valve).

[0042] The second main drain pipe 75 of the three-way syringe 34 is drained to the basin 2b through the discharge on-off valve 40d (main pipe flushing solenoid valve).

[0043] The first branch water supply pipe 52 is connected to the detachable part 1g. By attaching one end (adapter 21e) of the main tube (medium conduit 21) of the dental scaler 31 to the detachable part 1g, the first branch water supply pipe 52 and the supply pipe 21b of the dental scaler 31 are connected. The other end of the supply pipe 21b of the dental scaler 31 is connected to the dental scaler 31. A scaler water injection solenoid valve 52a (supply on-off valve 41a) is provided in the first branch water supply pipe 52. A scaler water injection switching solenoid valve 52b (supply pipe on-off valve 41b) is provided in the supply pipe 21b that supplies water to the dental scaler 31.

[0044] One end (adapter 21e) of the discharge pipe 21c of the dental scaler 31 is attached to the detachable part 1g provided outside the main body 10 of the medical device, thereby connecting the first branch drain pipe 72 and the discharge pipe 21c of the dental scaler 31. The other end of the discharge pipe 21c of the dental scaler 31 is connected to the supply pipe 20b of the dental scaler 31 in front of the scaler water injection switching solenoid valve 52b (supply pipe on-off valve 41b).

[0045] The scaler water injection switching solenoid valve 52b is arranged between the connection part of the discharge pipe 21c and the supply pipe 21b of the dental scaler 31 and the dental scaler 31. That is, the scaler water injection switching solenoid valve 52b is arranged on the downstream side of the connection part of the discharge pipe 21c and the supply pipe 21b of the dental scaler 31. Specifically, the scaler water injection switching solenoid valve 52b (supply pipe on-off valve 41b) is preferably provided at the engagement part 21X (connection part) of the medium conduit 21 with the dental scaler 31.

[0046] The second branch water supply pipe 53 is connected to the air turbine handpiece 32 through the air turbine main tube 22 (medium conduit 20) of the air turbine handpiece 32. One end of the supply pipe 20b of the air turbine handpiece 32 is connected to the second branch water supply pipe 53 at the second main tube detachable part 10a2 provided inside the main body 10 of the medical device. The other end of the supply pipe 20b of the air turbine handpiece 32 is connected to the air turbine handpiece 32. The second branch water supply pipe 53 is provided with an air turbine water injection solenoid valve 53a (supply on-off valve 40a). The supply pipe 20b for supplying water to the air turbine handpiece 32 is provided with an air turbine water injection switching solenoid valve 53b (supply pipe on-off valve 40b).

[0047] An air turbine water injection switching solenoid valve 53b is disposed between the connection portion of the discharge pipeline 20c and the supply pipeline 20b of the air turbine handpiece 32 and the air turbine handpiece 32. That is, the air turbine water injection switching solenoid valve 53b is disposed on the downstream side of the connection portion of the discharge pipeline 20c and the supply pipeline 20b of the air turbine handpiece 32. Specifically, the air turbine water injection switching solenoid valve 53b (supply pipeline on-off valve 40b) is preferably provided at the connection portion (engagement portion 20X) of the medium conduit 20 with the air turbine handpiece 32 (dental instrument 30).

[0048] The third branch water supply pipeline 54 is connected to the micro motor handpiece 33 via the micro motor main tube 23 (medium conduit 20) of the micro motor handpiece 33. One end of the supply pipeline 20b of the micro motor handpiece 33 is connected to the third branch water supply pipeline 54 at the third main tube attachment / detachment portion 10a3 provided inside the medical treatment apparatus main body 10. The other end of the supply pipeline 20b of the micro motor handpiece 33 is connected to the micro motor handpiece 33. A micro motor water injection solenoid valve 54a (supply on-off valve 40a) is provided in the third branch water supply pipeline 54. A micro motor water injection switching solenoid valve 54b (supply pipeline on-off valve 40b) is provided in the supply pipeline 20b for supplying water to the micro motor handpiece 33.

[0049] A micro motor water injection switching solenoid valve 54b is disposed between the connection portion of the discharge pipeline 20c and the supply pipeline 20b of the micro motor handpiece 33 and the micro motor handpiece 33. That is, the micro motor water injection switching solenoid valve 54b is disposed on the downstream side of the connection portion of the discharge pipeline 20c and the supply pipeline 20b of the micro motor handpiece 33. Specifically, the micro motor water injection switching solenoid valve 54b (supply pipeline on-off valve 40b) is preferably provided at the connection portion (engagement portion 20X) of the medium conduit 20 with the micro motor handpiece 33 (dental instrument 30).

[0050] The fourth branched water supply pipe 55 is connected to the three-way syringe 34 via the three-way syringe main tube 24 (medium conduit 20) of the three-way syringe 34. One end of the supply pipe 20b of the three-way syringe 34 is connected to the fourth branched water supply pipe 55 at the fourth main tube attachment / detachment part 10a4 of the medical device main body 10. The other end (second end) of the supply pipe 20b of the three-way syringe main tube 24 of the three-way syringe 34 is connected to the three-way syringe 34. The three-way syringe 34 is provided with a manual on-off valve (water supply operation lever) 34b, and by pressing this manual on-off valve (water supply operation lever) 34b, this manual on-off valve (water supply operation lever) 34b opens and water is injected from the tip nozzle part 34c of the three-way syringe 34.

[0051] One end (first end) of the discharge pipe 20c for discharging the water in the three-way syringe main tube 24 of the three-way syringe 34 is connected to the second main drainage pipe 75 at the fourth main tube attachment / detachment part 10a4 provided inside the medical device main body 10. The other end of the discharge pipe 20c of the three-way syringe 34 is connected to the supply pipe 20b of the three-way syringe 34. In the three-way syringe 34, it is desirable that the branch part of the supply pipe 20b and the discharge pipe 20c is arranged near the connection part of the medium conduit 20 with the three-way syringe 34.

[0052] The first main drainage pipe 71 is provided with a discharge on-off valve 40c (main tube flushing solenoid valve). The discharge on-off valve 40c (main tube flushing solenoid valve) is arranged between the confluence part where the first branched drainage pipe 72, the second branched drainage pipe 73 and the third branched drainage pipe 74 merge into the first main drainage pipe 71 and the basin 2b. That is, the discharge on-off valve 40c (main tube flushing solenoid valve) is arranged on the downstream side of the confluence part where the first branched drainage pipe 72, the second branched drainage pipe 73 and the third branched drainage pipe 74 merge into the first main drainage pipe 71.

[0053] A discharge opening and closing valve 40d (main pipeline flushing solenoid valve) is provided in the second main drainage pipeline 75. The second main drainage pipeline 75 is connected to the basin 2b. The basin 2b is configured to discharge water from the discharge pipelines 20c, 21c of the air turbine main tube 22, the micromotor main tube 23, and the three-way syringe main tube 24, respectively, and the water in the medium conduit 21.

[0054] The basin 2b and the drainage section 140 are connected by a connecting pipeline 141. The drainage section 140 is configured to discharge water from the discharge pipelines 20c, 21c of the medium conduit 20. The basin 2b and the cup water tap 2c are connected by a water supply cylinder 900. In the medical device 100 of the present embodiment, water from the cup water tap 2c is supplied to the basin 2b via the water supply cylinder 900, and water from the first main drainage pipeline 71 and the second main drainage pipeline 75 is drained.

[0055] When it is detected by a sensor (not shown) provided on the holder that the handpieces of the air turbine handpiece 32 and the micromotor handpiece 33 are taken out from the holder of the diagnostic device main body 10, and when an operation of a foot switch (not shown) is performed, the supply opening and closing valve 40a and the supply pipeline opening and closing valve 40b are opened, and the discharge opening and closing valve 40c is closed, and water is injected from a water injection port provided at the tip portion of the handpiece. That is, when supplying water to the handpiece to be used, the control unit 160 performs control to open the supply opening and closing valve 40a and the supply pipeline opening and closing valve 40b and close the discharge opening and closing valve 40c.

[0056] The dental scaler 31 attaches the other end of the medium conduit 21 to the detachable part 1g. When an operation of a foot switch (not shown) is performed, the supply on-off valve 41a and the supply line on-off valve 41b open, and the discharge on-off valve 40c closes, and water is injected from a water injection port provided at the tip portion of the handpiece. That is, when supplying water to the used dental scaler 31, the control unit 160 performs control to open the supply on-off valve 41a and the supply line on-off valve 41b and close the discharge on-off valve 40c. Note that the control unit 160 can detect whether or not the other end of the medium conduit 21 is attached to the detachable part 1g by performing a continuity check with the electrical wiring connected to the dental scaler 31 or by a sensor provided in the detachable part 1g.

[0057] On the other hand, during the flushing (cleaning) of each dental instrument 30, the supply on-off valve 40a corresponding to at least one of the handpieces (instruments) opens, the supply line on-off valve 40b closes, and the discharge on-off valve 40c opens, and water is discharged from the supply line 20b to the basin 2b via the discharge line 20c and the drain line 70. Also, during the flushing (cleaning) of the dental scaler 31, the supply on-off valve 41a opens, the supply line on-off valve 41b closes, and the discharge on-off valve 40c opens, and water is discharged from the supply line 21b to the basin 2b via the discharge line 21c and the drain line 70.

[0058] A supply on-off valve 40a is not provided in the fourth branch water supply pipe 55 connected to the three-way syringe 34. Also, a supply pipe on-off valve 40b is not provided in the supply pipe 20b of the three-way syringe 34. The three-way syringe 34 is provided with a water supply operation lever 34b in a grip portion 34a. By pressing the water supply operation lever 34b by a doctor or an assistant, water injection is performed from a tip nozzle portion 34c of the three-way syringe 34, and water injection of the three-way syringe 34 is not performed unless the water supply operation lever 34b is pressed. That is, the three-way syringe 34 is provided with an on-off valve that opens and closes by operating the water supply operation lever 34b. Therefore, although the supply pipe on-off valve 40b is not provided in the supply pipe 20b of the three-way syringe main tube 24, since the discharge pipe 20c and the second main drainage pipe (drainage pipe) 75 are provided, water in the pipe is discharged from the supply pipe 20b of the medium conduit 20 to the base 2b via the discharge pipe 20c and the second main drainage pipe (drainage pipe) 75.

[0059] Also, the fifth branch water supply pipe 56 is connected to the cup water supply faucet 2c. A cup water supply valve 56a is provided in the fifth branch water supply pipe 56. The cup water supply valve 56a is, for example, a solenoid valve. When the presence of a cup (not shown) below the cup water supply faucet 2c is detected by a sensor (not shown) provided in the cup water supply faucet 2c, the cup water supply valve 56a opens, and water is supplied from the cup water supply faucet 2c to the cup via the water supply cylinder 900.

[0060] The air supply pipe 60 includes a main air supply pipe 61, a first branch air supply pipe 62, a second branch air supply pipe 63, a third branch air supply pipe 64, and a fourth branch air supply pipe 65. The first branch air supply pipe 62, the second branch air supply pipe 63, the third branch air supply pipe 64, and the fourth branch air supply pipe 65 branch off from the main air supply pipe 61, respectively.

[0061] The main air supply line 61 is connected to an air source 60a as a compressed air source by a compressor (not shown). The main air supply line 61 is provided with a manual main valve 61a, a sterilizing filter 61b, etc. in order from the upstream side.

[0062] The first branch air supply line 62 is connected to the detachable part 1g. By attaching one end (adapter 21e) of the main tube (medium conduit 21) of the dental scaler 31 to the detachable part 1g, the first branch air supply line 62 and the air supply line 21d of the dental scaler 31 are connected. The other end of the air supply line 21d of the dental scaler 31 is connected to the dental scaler 31. The first branch air supply line 62 is provided with a first air turbine drive air solenoid valve 62a.

[0063] The second branch air supply line 63 is connected to the air turbine handpiece 32 via the air turbine main tube 22 (medium conduit 20). The second branch air supply line 63 is provided with an air turbine drive air solenoid valve 63a. The air turbine main tube 22 has an air supply line 20d. One end of the air supply line 20d of the air turbine main tube 22 is connected to the second branch air supply line 63 at the second main tube detachable part 10a2 provided inside the medical device main body 10. The other end (second end) of the air supply line 20d of the air turbine main tube 22 is connected to the air turbine handpiece 32, and it is possible to rotate a turbine (not shown) provided in the air turbine handpiece head (not shown) or to jet air from a separately provided jet outlet (not shown).

[0064] The third branch air supply pipeline 64 is connected to the micro motor handpiece 33 via the micro motor main tube 23 (medium conduit 20). A micro motor chip air solenoid valve 64a is provided in the third branch air supply pipeline 64. The micro motor main tube 23 has an air supply pipeline 20d. One end of the air supply pipeline 20d of the micro motor main tube 23 is connected to the third branch air supply pipeline 64 at the third main tube attachment / detachment part 10a3 provided inside the medical device main body 10. The other end of the air supply pipeline 20d of the micro motor main tube 23 is connected to the micro motor handpiece 33, and air can be ejected from a separately provided ejection port (not shown).

[0065] The fourth branch air supply pipeline 65 is connected to the three-way syringe 34 via the three-way syringe main tube 24 (medium conduit 20). The three-way syringe 34 has an air supply pipeline 20d. One end of the air supply pipeline 20d of the three-way syringe main tube 24 is connected to the fourth branch air supply pipeline 65 at the fourth main tube attachment / detachment part 10a4 provided inside the medical device main body 10. The other end of the air supply pipeline 20d of the three-way syringe main tube 24 is connected to the three-way syringe 34.

[0066] The dental scaler 31 attaches the other end of the medium conduit 21 to the attachment / detachment part 1g. When an operation of a foot switch (not shown) is performed, the first air turbine drive air solenoid valve 62a opens, and air is supplied from the air supply pipeline 21d. When an operation of a foot switch (not shown) is performed on the air turbine handpiece 32, the air turbine drive air solenoid valve 63a opens, and drive air is supplied from the air supply pipeline 20d to a turbine (not shown) built in the head.

[0067] Also, when an operation of a foot switch (not shown) is performed on the micro motor handpiece 33, the micro motor chip air solenoid valve 64a opens, chip air is supplied from the air supply pipeline 20d, and air can be ejected from an ejection port (not shown).

[0068] The fourth branch air supply pipeline 65 is not provided with the electromagnetic valve as described above. The three-way syringe 34 is provided with an air operation lever (not shown) on the grip portion 34a. By pressing the air operation lever by a doctor or an assistant, air is ejected from the tip nozzle portion 34c. The air operation lever is provided side by side with the water supply operation lever 34b. The air operation lever and the water supply operation lever 34b are selectively or simultaneously pressed by a doctor or an assistant.

[0069] A cleaning device 110 is connected to the main water supply pipeline 51. When the cleaning device 110 is a chemical solution cleaning device, the chemical solution cleaning device includes a chemical solution bottle 110a and a chemical solution pump 110b. The chemical solution bottle 110a is filled with a chemical solution such as hydrogen peroxide water or sodium hypochlorite. The chemical solution pump 110b is configured to supply the chemical solution in the chemical solution bottle 110a to the main water supply pipeline 51 in appropriate amounts. A chemical solution amount detection unit 111 is attached to the chemical solution bottle 110a. The chemical solution amount detection unit 111 is a sensor capable of detecting the amount of the chemical solution in the chemical solution bottle 110a. The control unit 160 may set, for example, the amount of the chemical solution supplied from the chemical solution pump 110b to the main water supply pipeline 51 according to the elapsed time since the previous power-off. Specifically, in the case of a short vacation of about one day, since the elapsed time since the previous power-off is short within 48 hours, the control unit 160 sets the chemical solution amount to a small amount or zero. In the case of a long vacation of three days or more, since the elapsed time since the previous power-off is long at 72 hours or more, the control unit 160 sets the chemical solution amount to a large amount. Of course, the control unit 160 can freely set the amount of the chemical solution supplied to the main water supply pipeline 51 by the operation of the user.

[0070] The control unit 160 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 operation program stored in the ROM or the like. The ROM stores programs and other data executed by the CPU. The RAM serves as a working area when the CPU executes a program, and temporarily stores programs, data when executing programs, and the like. Connected to the control unit 160 are a cleaning device 110, a chemical liquid amount detection unit 111, a flow meter 120, a drive unit 161, a display unit 162, a notification unit 163, a pipeline cleaning switch 164, a flushing switch 165, a main switch 166, a warmer switch 167, a water temperature detection sensor 168, and a water quality monitoring detector 170.

[0071] The drive unit 161 is for driving electromagnetic valves and the like of each handpiece (instrument) and the like, and driving the heater of the warmer tank 51d. The display unit 162 is installed on the treatment table 5 and the like, and various information related to medical treatment and the like is displayed. The notification unit 163 functions to notify when it is detected that the chemical liquid amount in the chemical liquid bottle of the cleaning device 110 has decreased by the chemical liquid amount detection unit 111, and when an abnormality in other devices is detected. In addition, the notification unit 163 can notify that an additional dental scaler 31 is attached to the attachment / detachment unit 1g, and notify that the attached dental scaler 31 is being cleaned.

[0072] The pipeline cleaning switch 164, flushing switch 165, and main switch 166 shown in FIG. 8 are respectively provided on the treatment table 5 (see FIG. 1) of the medical device main body 10 and the like. The pipeline cleaning switch 164 is operated by a doctor, an assistant, etc. when cleaning the water supply pipeline at an arbitrary timing. The flushing switch 165 is operated in advance by a doctor, an assistant, etc. when automatically cleaning the water supply pipeline at the time of power-on prior to the medical treatment by the medical device 100. The main switch 166 is operated by a doctor, an assistant, etc. when starting the medical device 100. The control unit 160 may control the drive unit 161 to operate the supply on-off valve 40a, supply pipeline on-off valve 40b, discharge on-off valve 40c, and discharge on-off valve 40d automatically according to the output of the water quality monitoring detector 170 to clean the water supply pipeline. Note that when cleaning the water supply pipeline, it is desirable for the control unit 160 to control so that the cleaning is completed about 1 to 5 minutes before the medical treatment time.

[0073] Next, in the medical device 100 according to the present embodiment, the flushing operation including the dental scaler 31 will be described. FIG. 9 is a flowchart for explaining the flushing operation at the time of power-on in the medical device 100 according to an embodiment of the present disclosure. The control unit 160 determines whether the main switch 166 has been pressed and the power is turned on (step S101). If the power is not on (NO in step S101), the control unit 160 returns the process to step S101.

[0074] When the power is turned on (YES in step S101), the control unit 160 sets the amount of chemical solution according to the elapsed time since the previous power-off (step S102). The degree of contamination of the water remaining in the water supply pipeline varies according to the elapsed time since the previous power-off. When the elapsed time since the previous power-off is long, the control unit 160 sets a large amount of chemical solution. Of course, when the elapsed time since the previous power-off is short, the control unit 160 may set the amount of chemical solution to zero and clean the water supply pipeline with only water.

[0075] Next, the control unit 160 starts the flushing operation (step S103). In the flushing operation, the cleaning of the fifth branch water supply pipe 56 that supplies water to the cup faucet 2c described in FIG. 7, the cleaning of the fourth branch water supply pipe 55 that supplies water to the three-way syringe 34, the cleaning of the second branch water supply pipe 53 that supplies water to the air turbine handpiece 32, and the cleaning of the third branch water supply pipe 54 that supplies water to the micromotor handpiece 33 are performed in order. Further, the control unit 160 determines whether the other end of the medium conduit 21 (additional supply conduit) of the dental scaler 31 is attached to the attachment / detachment unit 1g (step S104). Note that the control unit 160 can detect whether the other end of the medium conduit 21 is attached to the attachment / detachment unit 1g by checking the continuity of the electrical wiring connected to the dental scaler 31 or by a sensor provided in the attachment / detachment unit 1g.

[0076] When the other end of the medium conduit 21 (additional supply conduit) is attached to the attachment / detachment unit 1g (YES in step S104), the control unit 160 closes the supply line on-off valve 41b (additional supply line on-off valve) (step S105). Next, the control unit 160 opens the supply on-off valve 41a (additional supply on-off valve) (step S106). Note that since the discharge on-off valve 40c is already open when cleaning other conduits, the control unit 160 does not need to open the discharge on-off valve 40c again, but opens it if it is closed. Thereby, since the cleaning liquid is supplied from the cleaning device 110 to the supply line 21b of the dental scaler 31, the water remaining in the supply line 21b is discharged from the discharge line 21c to the drainage unit 140. When the other end of the medium conduit 21 (additional supply conduit) is not attached to the attachment / detachment unit 1g (NO in step S104), the control unit 160 skips the processes of step S105 and step S106.

[0077] The control unit 160 has a preset time (predetermined time) required for cleaning the water supply pipe, and determines whether the predetermined time has elapsed (step S107). If the predetermined time has not elapsed (NO in step S107), the control unit 160 returns the process to step S101 and waits for the predetermined time to elapse. When the predetermined time has elapsed (YES in step S107), the control unit 160 ends the flushing operation (step S108).

[0078] The control unit 160 determines whether the other end of the medium conduit 21 (additional supply conduit) of the dental scaler 31 is attached to the attachment / detachment portion 1g (step S109). When the other end of the medium conduit 21 (additional supply conduit) is attached to the attachment / detachment portion 1g (YES in step S109), the control unit 160 closes the supply on-off valve 41a (additional supply on-off valve) (step S110). Next, the control unit 160 opens the supply conduit on-off valve 41b (additional supply conduit on-off valve) (step S111). Note that if the control unit 160 has stored the determination as to whether the other end of the medium conduit 21 (additional supply conduit) of the dental scaler 31 is attached to the attachment / detachment portion 1g in step S104, it is not necessary to make the determination again in step S109.

[0079] When the other end of the medium conduit 21 (additional supply conduit) is not attached to the attachment / detachment portion 1g (NO in step S109), the control unit 160 skips the processes of step S110 and step S111. Next, the control unit 160 closes the supply on-off valve 40a of the other conduit (step S112). The control unit 160 opens the supply conduit on-off valve 40b of the other conduit (step S113). Finally, the control unit 160 closes the discharge on-off valves 40c, 40d (step S114).

[0080] Thus, in the medical device 100, if the other end of the medium conduit 21 (additional supply conduit) is attached to the attachment / detachment part 1g when the power is turned on, the supply on-off valve 41a (additional supply on-off valve) and the supply conduit on-off valve 41b (additional supply conduit on-off valve) can be controlled to automatically clean the medium conduit 21 (additional supply conduit). Therefore, in the medical device 100, the medium conduit 21 (additional supply conduit) can be automatically cleaned without checking the presence or absence of the medium conduit 21 (additional supply conduit), which is hygienic.

[0081] Next, the cleaning operation of the water supply conduit when the dental scaler 31 is added during the operation of the medical device 100 will be described. FIG. 10 is a timing chart for explaining the cleaning of the conduit when a dental instrument is additionally attached. First, as shown in FIG. 10, the control unit 160 has the main switch 166 pressed and the power is in the ON state. That is, the medical device 100 is in operation. After that, when the doctor or assistant attaches the other end of the medium conduit 21 (additional supply conduit) of the dental scaler 31 to the attachment / detachment part 1g and adds the dental scaler 31, the control unit 160 changes the attachment flag indicating the presence or absence of the attachment of the medium conduit 21 (additional supply conduit) from the OFF state to the ON state. The control unit 160 switches the ON state and the OFF state of the attachment flag by checking the continuity with the electrical wiring connected to the dental scaler 31 or by means of a sensor provided in the attachment / detachment part 1g.

[0082] When the attachment flag becomes ON, the control unit 160 starts cleaning the added medium conduit 21 (additional supply conduit). Specifically, the control unit 160 changes the state of the supply conduit on-off valve 41b (additional supply conduit on-off valve) from the ON state (open state) to the OFF state (closed state). Also, the control unit 160 changes the state of the supply on-off valve 41a (additional supply on-off valve) from the OFF state (closed state) to the ON state (open state). Further, the control unit 160 changes the state of the discharge on-off valve 40c from the OFF state (closed state) to the ON state (open state).

[0083] The control unit 160 has a cleaning period (predetermined period) set in advance for cleaning the medium conduit 21 (additional supply line) of the dental scaler 31. When the cleaning period has elapsed, the cleaning is terminated. The cleaning period can be set to, for example, several tens of seconds to about 1 minute so that the medium conduit 21 of the additional dental scaler 31 can be cleaned without causing the doctor or assistant to interrupt the treatment.

[0084] When the cleaning period has elapsed, the control unit 160 terminates the cleaning of the additional medium conduit 21 (additional supply line) for which the mounting flag is in the ON state. Specifically, the control unit 160 changes the state of the supply on-off valve 41a (additional supply on-off valve) from the ON state (open state) to the OFF state (closed state). Also, the control unit 160 changes the state of the supply line on-off valve 41b (additional supply line on-off valve) from the OFF state (closed state) to the ON state (open state). Further, the control unit 160 changes the state of the discharge on-off valve 40c from the ON state (open state) to the OFF state (closed state).

[0085] Furthermore, in the medical device 100, even when the other end of the medium conduit 21 (additional supply line) is attached to the attachment / detachment unit 1g during operation, the supply on-off valve 41a (additional supply on-off valve) and the supply line on-off valve 41b (additional supply line on-off valve) can be controlled to automatically clean the medium conduit 21 (additional supply line). Therefore, in the medical device 100, the medium conduit 21 (additional supply line) is always cleaned before use, which is hygienic.

[0086] (Modification example) The dental instrument connected to the other end of the additional medium conduit 21 (additional supply line) is not limited to the dental scaler 31, and may be an air turbine handpiece, a micromotor handpiece, or the like. Further, the medium conduit 21 (additional supply line) is not limited to the configuration including a supply conduit 21b (additional supply line), a discharge conduit 21c (additional discharge line), and an air supply conduit 21d (additional air supply line) in the exterior 21a as shown in FIG. 4. For example, the medium conduit 21 (additional supply line) may have a configuration including an exhaust conduit for exhausting driving air in addition to the conduits of the supply conduit 21b (additional supply line), the discharge conduit 21c (additional discharge line), and the air supply conduit 21d (additional air supply line). Conversely, the medium conduit 21 (additional supply line) may have a configuration including only the supply conduit 21b (additional supply line) and the discharge conduit 21c (additional discharge line).

[0087] The detachable part 1g for attaching one end of the medium conduit 21 (additional supply line) is provided at the lower part of the back plate 1c as shown in FIG. 2(b), but it may be provided at any location on the medical device main body 10. For example, it may be provided on the base 1a, the seat plate 1b, the spittoon 2, or the like. Further, the detachable part 1g is not limited to the case where one is provided on the medical device main body 10, and a plurality of detachable parts 1g may be provided. The plurality of detachable parts 1g may be provided, for example, at the lower part of the same back plate 1c, or one may be provided at the lower part of the back plate 1c and the other may be provided at a different location such as the spittoon 2.

[0088] Even when the other end of the medium conduit 21 (additional supply line) is attached to the attachment / detachment part 1g during operation, when another dental instrument 30 is in a driving state, the supply on-off valve 41a (additional supply on-off valve) and the supply line on-off valve 41b (additional supply line on-off valve) may not be controlled, and the supply of cleaning liquid to the medium conduit 21 (additional supply line) may be stopped. When another dental instrument 30 is in a driving state, since there is a possibility that the patient is being treated, the medical device 100 can prohibit the supply of cleaning liquid to the medium conduit 21 (additional supply line) and give priority to the treatment of the patient by another dental instrument 30. When the driving of another dental instrument 30 stops, the medical device 100 starts the supply of cleaning liquid to the medium conduit 21 (additional supply line), early implements the cleaning of the medium conduit 21 (additional supply line), and early realizes the use of the dental scaler 31. When the user drives another dental instrument 30 during the supply of cleaning liquid to the medium conduit 21 (additional supply line), the supply of cleaning liquid to the medium conduit 21 (additional supply line) may be prioritized. Thereby, the medical device 100 can early implement the cleaning of the medium conduit 21 (additional supply line) and early realize the use of the dental scaler 31.

[0089] The medical device 100 monitors the water pressure of the supply line 21b etc. during operation. When the monitored water pressure shows an abnormality when the other end of the medium conduit 21 (additional supply line) is attached to the attachment / detachment part 1g, the supply of cleaning liquid to the medium conduit 21 (additional supply line) may be prohibited. Also, when the other end of the medium conduit 21 (additional supply line) is attached to the attachment / detachment part 1g and the monitored water pressure shows an abnormality when cleaning liquid is being supplied to the medium conduit 21 (additional supply line), the supply of cleaning liquid to the medium conduit 21 (additional supply line) may be interrupted. Further, when the medical device 100 prohibits or interrupts the supply of cleaning liquid to the medium conduit 21 (additional supply line), it may notify the user by displaying the fact on the display part 162 or making a sound from the speaker of the notification part 163. Thereby, the medical device 100 can prevent inappropriate cleaning.

[0090] The embodiments disclosed this time should be considered as illustrative in all respects and not restrictive. The scope of the present disclosure is shown not by the above description but by the claims, and it is intended that all modifications within the meaning and scope equivalent to the claims be included.

Explanation of Signs

[0091] 1 Examination table, 2 Spittoon, 3 Lighting device, 4 Arm for lighting device, 5 Treatment table, 6 Arm for treatment table, 10 Main body of medical device, 20, 21 Media conduit, 20a Exterior, 20b, 21b Supply pipeline, 20c, 21c Discharge pipeline, 20d, 21d Air supply pipeline, 20f Exhaust pipeline, 22 Air turbine main tube, 23 Micromotor main tube, 24 Three-way syringe main tube, 30 Dental instrument, 31 Dental scaler, 32 Air turbine handpiece, 33 Micromotor handpiece, 34 Three-way syringe, 40 Valve, 40a, 41a Supply on-off valve, 40b, 41b Supply pipeline on-off valve, 40c, 40d Discharge on-off valve, 50 Water supply pipeline, 51 Main water supply pipeline, 52 First branch water supply pipeline, 52a Scaler water injection solenoid valve, 52b Scaler water injection switching solenoid valve, 53 Second branch water supply pipeline, 53a Air turbine water injection solenoid valve, 53b Air turbine water injection switching solenoid valve, 54 Third branch water supply pipeline, 54a Micromotor water injection solenoid valve, 54b Micromotor water injection switching solenoid valve, 55 Fourth branch water supply pipeline, 56 Fifth branch water supply pipeline, 60 Air supply pipeline, 70 Drainage pipeline, 71 First main drainage pipeline, 72 First branch drainage pipeline, 73 Second branch drainage pipeline, 74 Third branch drainage pipeline, 75 Second main drainage pipeline, 100 Medical device, 110 Chemical solution cleaning device, 111 Chemical solution quantity detection unit, 120 Flowmeter, 140 Drainage unit, 160 Control unit, 170 Detector for water quality monitoring.

Claims

1. A dental medical device, comprising: A water supply pipe for supplying water to a dental instrument; A plurality of valves arranged in the water supply pipe for changing the flow of water; A detachable part for connecting one end of an additional supply pipe, the other end of which is connected to the dental instrument, to the water supply pipe; A detection part for detecting that one end of the additional supply pipe is attached to the detachable part; A cleaning device for supplying a cleaning liquid to the water supply pipe; A control part for controlling the opening and closing of the plurality of valves, wherein when the detection part detects that one end of the additional supply pipe is attached to the detachable part, the control part controls the opening and closing of the plurality of valves so that the cleaning liquid is supplied from the cleaning device to the additional supply pipe.

2. A discharge pipe for discharging the water; An additional discharge pipe having one end connected to the additional supply pipe; An additional supply pipe opening and closing valve provided between the connection part of the additional supply pipe and the additional discharge pipe and the dental instrument, wherein the detachable part can connect the other end of the additional discharge pipe to the discharge pipe, and when the detection part detects that one end of the additional supply pipe is attached to the detachable part, the control part closes the additional supply pipe opening and closing valve so that the cleaning liquid supplied from the cleaning device to the additional supply pipe is discharged through the additional discharge pipe. The medical device according to claim 1.

3. An air supply pipe for supplying air to the dental instrument; An additional air supply pipe having one end connected to the dental instrument, wherein the detachable part can connect the other end of the additional air supply pipe to the air supply pipe, and the dental instrument is a dental scaler. The medical device according to claim 2.

4. When the power of the medical device is turned on, if the detection part detects that one end of the additional supply pipe is attached to the detachable part, the control part cleans the additional supply pipe. The medical device according to any one of claims 1 to 3.

5. The cleaning device sets the amount of chemical solution contained in the cleaning liquid according to the length of the period from when the power of the medical device is turned off to when it is turned on. The medical device according to claim 4.

6. The control part When, during operation of the medical device, the detection unit detects that one end of the additional supply pipeline is attached to the detachable part, the opening and closing of the plurality of valves are controlled so that the cleaning liquid is supplied from the cleaning device to the additional supply pipeline. The medical device according to any one of claims 1 to 3.

7. The control unit controls the opening and closing of the plurality of valves so that the cleaning liquid is supplied from the cleaning device to the additional supply pipeline for a predetermined period after one end of the additional supply pipeline is attached to the detachable part. The medical device according to claim 6.

8. A water supply pipeline for supplying water to a dental instrument, a plurality of valves arranged in the water supply pipeline for changing the flow of water, a detachable part for connecting one end of an additional supply pipeline having the other end connected to the dental instrument to the water supply pipeline, a detection unit for detecting that one end of the additional supply pipeline is attached to the detachable part, a cleaning device for supplying a cleaning liquid to the water supply pipeline, and a control unit for controlling the opening and closing of the plurality of valves. A cleaning method for cleaning the pipeline of a dental medical device, comprising: A step of detecting, by the detection unit, that one end of the additional supply pipeline is attached to the detachable part; When the detection unit detects that one end of the additional supply pipeline is attached to the detachable part, a step of controlling the opening and closing of the plurality of valves so that the cleaning liquid is supplied from the cleaning device to the additional supply pipeline. A cleaning method.

Images