JP2001218775A - Water jet nozzle device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water jet nozzle device capable of preventing water, for instance, containing unwanted bacteria from flowing back and preventing contamination inside the device, the contamination of a water supply source and clogging, etc. SOLUTION: In this water jet nozzle device for jetting supplied water through a nozzle, by interposing a non-return means, back flow from a nozzle side at the time of not supplying the water is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, a water jet nozzle device used for dental treatment, and more particularly, to prevent backflow from the nozzle tip side to prevent invasion of various bacteria and foreign substances, and The present invention relates to a device devised so as to prevent contamination of a water supply source due to intrusion and a clogging phenomenon due to intrusion of foreign matter.

[0002]

2. Description of the Related Art For example, in dental treatment, a cleaning apparatus has a structure as shown in FIGS. 7 to 9, for example. First, there is a gripping cylindrical portion 201, and this gripping cylindrical portion 2
Inside 01, a thin tube 203 is provided, and an end plug 205 is attached to the left side of the thin tube 203 in the drawing. A nozzle 207 is connected to the end plug 205. A tube (not shown) is connected to the right end of the thin tube 203 in the drawing, and this tube is connected to a water supply source (not shown).

According to the above configuration, water supplied from a water supply source (not shown) is jetted as high-pressure water of a predetermined pressure to the affected part via the thin tube 203, the end plug 205, and the nozzle 207. The affected area is cleaned.

[0004]

According to the above-mentioned conventional configuration, there are the following problems. That is, the affected side of the patient and the water supply source are in communication with each other via the water jet nozzle device. That is, through the nozzle 207, the end plug 205, the thin tube 203, and a tube (not shown),
There is always a communication between the affected part of the patient and the water supply source. On the other hand, on the affected part side of the patient, there are various germs and foreign substances generated by the treatment. Such bacteria and foreign matter may enter the water supply source side through the nozzle 207, the end plug 205, the thin tube 203, and a tube (not shown). In this case, all the water of the water supply source is contaminated by the bacteria. It is also expected that they will be clogged by foreign matter that has entered. In this case, a problem is particularly caused when the water jet by the water jet nozzle device is stopped. In other words, when water is jetted by the water jet nozzle device, the backflow of water on the affected side is prohibited by the pressure, and therefore, the water containing bacteria and foreign matter does not flow back to the water supply source side. Absent. On the other hand, when the injection of water by the water jet nozzle device is stopped, the effect of preventing infiltration due to pressure is lost, so that water containing various bacteria and foreign matters flows from the affected part into the nozzle 2
There is a possibility that the water will flow backward through 07 and enter the water supply source side.

[0005] The above-mentioned germs are supplemented by explanation. For example, important microorganisms that cause nosocomial infections in dentistry include aerobic bacteria, anaerobic bacteria, spirochetes, fungi, and viruses. When teeth are cut using a water jet nozzle device for patients infected with these microorganisms, the microorganisms are scattered into the oral cavity and indoors together with fine dust, blood, saliva, plaque, etc. In some cases, the liquid may enter the inside of the water jet nozzle device through the nozzle 207. Microorganisms that have infiltrated into these devices will stay in the device, but if another patient is treated as it is, the staying microorganisms will be injected into the affected area of that other patient, and this other patient will be treated. Will also be infected. Furthermore, if the above-mentioned backflow occurs, microorganisms will infiltrate into the water supply source, and in this case, the whole water of the water supply source will be polluted.

The present invention has been made on the basis of the above points, and an object of the present invention is to prevent, for example, water containing various germs and foreign substances from flowing back and to prevent invasion of various germs and foreign substances. It is another object of the present invention to provide a water jet nozzle device capable of preventing contamination of a water supply source due to various bacteria and clogging due to intrusion of foreign matter.

[0007]

According to a first aspect of the present invention, there is provided a water jet nozzle apparatus for jetting supplied water through a nozzle, wherein a non-return means is provided. By doing so, backflow from the nozzle side during non-water supply is prevented. In the water jet nozzle device according to the second aspect, in the water jet nozzle device according to the first aspect, the non-return means resiliently contacts a shaft member inserted and arranged in the flow path and an outer peripheral side of the shaft member.・ The annular valve element is arranged.When water is supplied, the annular valve element is expanded by the water supply pressure to form a gap between the annular valve element and the shaft member. When water is not supplied, the annular valve element contracts due to the elastic return force of the annular valve element. And is elastically contacted with the shaft member. In the water jet nozzle device according to the third aspect, in the water jet nozzle device according to the first aspect, the check means includes a spherical valve element inserted and arranged in a flow path, and the spherical valve element is mounted on a valve seat. When the water is supplied, the spherical valve element moves against the spring force of the spring to form a gap between the valve seat and the spherical valve element when the water is not supplied. It is characterized by being pushed back and pressed against the valve seat. A water jet nozzle device according to a fourth aspect is the water jet nozzle device according to any one of the first to third aspects, wherein the check means is mounted at a position close to the nozzle. Is what you do. Further, a water jet nozzle device according to claim 5 is the water jet nozzle device according to any one of claims 1 to 4, which is used for medical use including dental treatment. It is assumed that. Further, a water jet nozzle device according to claim 6 is the water jet nozzle device according to any one of claims 1 to 5, wherein the water supply pressure is ^1kg / cm ^{2 ~2000kg} / cm 2 Things.

That is, the water jet nozzle device according to the present invention is provided with a non-return means for preventing a back flow from the nozzle side when water is not supplied. Thereby, invasion of various germs and foreign matter from the nozzle side can be prevented, and contamination in the apparatus due to infiltration of various germs and foreign matter, contamination of a water supply source, clogging due to intrusion of various foreign matters, and the like can be prevented. Various configurations are conceivable as the non-return means.For example, the non-return means includes a shaft member inserted and arranged in the flow path and an annular valve body elastically contacted and arranged on the outer peripheral side of the shaft member. It is conceivable that the annular valve body is expanded by the water supply pressure and a gap is formed between the annular valve body and the shaft member. When water is not supplied, the annular valve body is contracted by the elastic return force of the annular valve body and elastically contacts the shaft member. Can be In addition, the spherical valve body is disposed in the flow path, and a spring that presses the spherical valve body against the valve seat is formed. When water is supplied, the spherical valve body moves against the spring force of the spring due to the water supply pressure. It is conceivable that a gap is formed, and when no water is supplied, the spherical valve body is pushed back by the spring force of the spring and pressed against the valve seat. Regarding where the check means is provided, it is preferable that the check means is located at a position close to the nozzle. This is because infiltration of various bacteria and foreign substances can be limited within a narrow range at the tip of the apparatus as much as possible. The use is not particularly limited, but it may be used for medical treatment such as dental treatment. For example, in the case of dental treatment, the affected part may be subjected to tooth cutting or cleaning, and at this time, it is conceivable that various germs and foreign substances present in the affected part are mixed with water and flow backward. When such a backflow occurs, it is expected that the inside of the apparatus will be deeply contaminated by the germs or the water supply source will be contaminated, and that it will be clogged by foreign matter. Therefore, by providing a non-return means, such a reverse flow can be prohibited, and contamination of the inside of the apparatus by a germ, contamination of a water supply source, and occurrence of clogging by foreign matter can be eliminated. Although there is no particular limitation on the feed water pressure, for example, 1 kg / cm ^{2 to} 2000 kg /
cm ² .

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a side view showing a configuration of a water jet nozzle device according to the present embodiment, and FIGS. 2 and 3 are portions II and III of FIG.
It is sectional drawing which expands and shows the internal structure of a part. As shown in FIG. 1, first, there is a gripper 1. The configuration of the grip portion 1 on the distal end side will be described. As shown in FIG. 2, the distal end portion is bent in a substantially “C” shape, and the distal end of the bent side has a nozzle 3 (see FIG. 1). (Shown) is provided.

[0010] On the other hand, a screw member 7 is screwed into the tip of the straightly extended side.
Is mounted with a shaft member 9. The shaft member 9 is deeply inserted and arranged in a flow path 11 formed in the grip portion 1. Also, the screw member 7 and the stepped portion 13 on the side of the flow path 11 are provided.
And a seal ring 15 is mounted between them. A check valve 17 and sleeves 19 and 21 are provided on the outer peripheral side of the shaft member 9 and on the inner peripheral side of the end portion 1.

The check valve 17 is made of nylon and has a hollow shape. The check valve 17 includes a base portion 17a and a valve body portion 17b which is extended while being contracted from the base portion 17a. The valve body 17b is mounted in a state of being pressed against the outer peripheral surface of the shaft member 9. Then, when the water supply pressure acts from the right side in the figure, the valve element 17b
Is spread outward, whereby a gap is formed between the shaft member 9 and water can be supplied. Conversely, when the action of the pressure is released, the valve element 17b returns to its original state due to its own elastic return force, the gap disappears, the water supply stops, and the backflow from the nozzle 3 side is prohibited. .

Next, the configuration on the base end side of the grip portion 1 will be described. As shown in FIG. 3, first, a male screw portion 21 is provided on an outer periphery of a base end portion of the grip portion 1. Meanwhile, the sleeve 23
A female screw portion 25 is provided on the inner peripheral portion of the sleeve 23. A connection fitting 27 is inserted into the inside of the sleeve 23 from the left side in FIG. 3, and a seal ring 29 and a backup ring 31 are interposed between the connection fitting 27 and the grip portion 1. By screwing the sleeve 23 onto the grip 1 in this state, the connection fitting 27 is connected to the grip 1. At this time, a small gap 35 is formed between the connection fitting 27 and the grip part 1, whereby the connection fitting 27 can be rotated. Also, the sleeve 23 and the connection fitting 27
The needle bearing 37 and the ball bearing 41 are interposed between the two.

A hose (not shown) is connected to the connection fitting 27, and this hose is connected to a water supply source (not shown). The sleeve 23 has a drain hole 33 formed therein. The water supply pressure is not particularly limited, but may be, for example, 1 kg / cm ²
２０００2000 kg / cm ² .

The operation will be described based on the above configuration. First, when using the water jet nozzle device according to the present embodiment, water of a predetermined pressure is supplied from the hose and the connection fitting 27 side. The pressure of the water supply causes the valve element 17b of the check valve 17 to expand, whereby a gap is formed between the valve element 17b and the shaft member 9. The supplied water flows through the gap and is jetted through the nozzle 3. Using this injection, the affected part of the patient is subjected to tooth cutting or the affected part is cleaned. As described above, when the water is supplied and the water jet nozzle device is used, since the pressure acts from the water supply side toward the nozzle 3 side, the water on the affected side does not flow backward. Therefore, various germs and foreign substances existing on the affected part side do not mix with the backflow water and enter the inside of the apparatus or the water supply source side.

Next, a case in which water supply is stopped to stop using the water jet nozzle device will be described. In this case, since the action of the water supply pressure is eliminated, the valve element 17b of the check valve 17 contracts due to its own elastic return force, and the gap between the valve element 17b and the shaft member 9 is thereby reduced. It is closed. Therefore, the flow path 11 that connects the nozzle 3 side and the water supply source side is closed, and backflow of water containing various bacteria and foreign substances from the nozzle 3 side is also prohibited. Therefore, also in this case, the water on the affected part does not flow backward, and therefore, various germs and foreign substances present on the affected part do not enter the water supply side by being mixed with the backflow water.

Further, since the connection fitting 27 is rotatably connected to the base end side of the grip portion 1, even if the grip portion 1 is moved in various directions during use, the hose may be twisted or the grip portion 1 may be moved. There is no hindrance to the operation.

According to the present embodiment, the following effects can be obtained. First, when the water supply is stopped, it is possible to prevent the backflow of water on the nozzle 3 side containing germs and foreign substances. This is because the check valve 17 is provided, and when the water supply is stopped, the check valve 17 closes to inhibit the backflow of water from the nozzle 3 side. Since the backflow can be prevented, it is possible to prohibit intrusion of bacteria and foreign matter into the water supply source side, and it is possible to reliably prevent contamination of the water supply source by bacteria and foreign matter. In particular, when used for dental treatment and the like, secondary infection due to invasion of microorganisms, that is, infection to another patient, and large amount of infection due to infection of a water supply source can be reliably prevented. Further, it is possible to prevent the occurrence of a clogging phenomenon inside the apparatus due to the invasion of foreign matter. In particular, since the check valve 17 is disposed on the distal end side of the grip portion 1, it is possible to prevent contamination of water staying in the grip portion 1 and to use the distal end when the next use. Only the part needs to be cleaned. Further, the check valve 17 is made of nylon and has high durability, so that it can provide a stable function for a long time. Further, in the case of the present embodiment, since the connection fitting 27 is rotatably connected, the hose is not twisted even if the gripper 1 is moved in various directions. An unreasonable load does not act on the part 1.

Next, a second embodiment of the present invention will be described with reference to FIG. In the case of the second embodiment,
First, the gripper 1 is divided into two parts, and is composed of a front gripper 1a and a rear gripper 1b. Further, the shaft member 9 is directly fixed to the distal end gripping portion 1a by screwing and joining. Also, a nut 41 is arranged on the outer periphery of the joint between the front grip 1a and the rear grip 1b, and the nut 41 is screwed to the front grip 1a to thereby secure the front grip 1a and the rear grip 1b. And to join. In addition, a seal ring 43 is interposed between the front grip 1a and the rear grip 1b. The other configuration is the same as that of the first embodiment, so that the same portions are denoted by the same reference numerals and description thereof will be omitted.

Therefore, the same effects as those of the first embodiment can be obtained, and the structure is simplified. Further, the gripping portion 1 is divided into the front gripping portion 1a and the rear gripping portion 1.
b can be divided as appropriate, thereby simplifying maintenance.

Next, a third embodiment of the present invention will be described with reference to FIGS. FIG. 5 is a longitudinal sectional view of a water jet nozzle device according to this embodiment, and FIG. 6 is an enlarged sectional view showing a portion VI in FIG. First,
There is a hollow holding portion 101, and a sleeve 103 is provided inside the holding portion 101. The above sleeve 103
5, a connection fitting 105 is screwed and joined, and a hose (not shown) is connected to the connection fitting 105. This hose is connected to a water supply source (not shown).

A nozzle 107 is mounted and fixed to the right end of the sleeve 103 in FIG. The above sleeve 1
A check valve 109 is provided in the inside of the connector 03 and on the left side of the connection fitting 105 in FIG. As shown in FIG. 6, the check valve 109 includes a valve seat 111, a coil spring 113 inserted between the valve seat 111 and the stepped portion 103 a of the sleeve 103, and a spherical valve body 115.
It is composed of Although various materials can be considered as the material of the spherical valve element 115, for example, plastic, rubber, stainless steel, and the like can be considered. A seal ring 117 and a backup ring 119 are mounted on the outer periphery of the valve seat 111.

According to the above configuration, first, when the water jet nozzle device is used, the hose and the connection fitting 10 are used.
Water supply at a predetermined pressure is performed from the fifth side. With this water supply,
The spherical valve element 115 of the check valve 109 is a coil spring 1
13 against the spring force of FIG. As a result, the check valve 109 is opened,
The supplied water is supplied to the nozzle 107 side, and the nozzle 10
7 will be injected into the affected area. At this time, since the water supply pressure is acting from the water supply side toward the nozzle 107 side, the water containing the germs on the nozzle 107 side does not flow backward, and therefore the water of the water supply source is reduced by the water containing the germs. There is no contamination.

Next, when the water jet nozzle device is not used, water supply from the hose and the connection fitting 105 stops. As a result, the water supply pressure does not act on the check valve 109, and the spherical valve body 115 is pushed back to the right side in the figure by the spring force of the coil spring 113 and pressed against the valve seat 111. Thereby, the check valve 109 is closed. By closing the check valve 109, the backflow of the water containing the germs on the nozzle 107 side is prohibited, so that the water of the water supply source is not contaminated by the water containing the germs. . Therefore,
The same effects as in the case of the first embodiment can be obtained. It is also conceivable to provide the check valve 109 on the distal end side (the left side in FIG. 5) of the grip portion 101, whereby a backflow prevention effect can be obtained on the distal end side.

The present invention is not limited to the first to third embodiments. The configuration of the check means is not limited to the configurations shown in the first and second embodiments, but various configurations are conceivable. In addition, it can be used for various medical purposes other than dental treatment, or for other purposes.

[0025]

As described in detail above, according to the water jet nozzle device of the present invention, since the non-return means for preventing the back flow from the nozzle side during non-water supply is provided, various germs from the nozzle side can be prevented. Prevents foreign matter from entering,
It is possible to prevent contamination in the apparatus due to infiltration of various germs and foreign matter, contamination of a water supply source, clogging due to infiltration of various foreign matter, and the like. In addition, when the check means is provided at a position close to the nozzle, infiltration of various bacteria and foreign substances can be limited to a narrow area at the tip, and this part can be easily cleaned. is there. In addition, when used for dental treatment, the affected part may be subjected to tooth cutting and cleaning, and at that time, various bacteria and foreign substances present in the affected part may be mixed with water and flow backward, By providing the check means, such backflow can be prohibited, and contamination of the water supply source due to various bacteria and clogging due to foreign matter can be eliminated.

[Brief description of the drawings]

FIG. 1 is a view showing a first embodiment of the present invention, and is a side view showing an entire configuration of a water jet nozzle device.

FIG. 2 is a view showing the first embodiment of the present invention, and is an enlarged sectional view showing an internal structure of a portion II in FIG. 1;

FIG. 3 is a diagram showing the first embodiment of the present invention, and is an enlarged sectional view showing an internal structure of a part III in FIG. 1;

FIG. 4 is a view showing a second embodiment of the present invention, and is a cross-sectional view showing a configuration on a distal end side of a water jet nozzle device.

FIG. 5 is a view showing a third embodiment of the present invention, and is a cross-sectional view showing an entire configuration of a water jet nozzle device.

FIG. 6 is a diagram showing a second embodiment of the present invention, and is a cross-sectional view showing a VI portion in FIG. 5 in an enlarged manner.

FIG. 7 is a view showing a conventional example, and is a side view showing the entire appearance of a water jet nozzle device.

FIG. 8 is a view showing a conventional example, and is a longitudinal side view showing an entire configuration of a water jet nozzle device.

9 is a view showing a conventional example, and is a cross-sectional view along IX-IX in FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Gripping part 3 Nozzle 9 Shaft member 17 Check valve (check means) 17a Base 17b Valve body 109 Check valve 111 Valve seat 113 Coil spring 113 115 Spherical valve body

Claims (6)

[Claims] 1. A water jet nozzle device for injecting supplied water through a nozzle, wherein a non-return means is provided to prevent a back flow from the nozzle side during non-water supply. Water jet nozzle device. 2. The water jet nozzle device according to claim 1, wherein said check means is a shaft member inserted and arranged in a flow path, and an annular valve body elastically arranged and arranged on an outer peripheral side of said shaft member. When water is supplied, the annular valve body is expanded by the water supply pressure to form a gap between the annular valve body and when water is not supplied, the annular valve body contracts due to the elastic return force of the annular valve body and elastically contacts the shaft member. A water jet nozzle device, characterized in that: 3. The water jet nozzle device according to claim 1, wherein the check means is a spherical valve inserted and arranged in a flow path;
It consists of a spring that presses this spherical valve body against the valve seat.When water is supplied, the water supply pressure causes the spherical valve body to move against the spring force of the spring to form a gap between the valve seat and the valve valve. A water jet nozzle device wherein a valve body is pushed back by a spring force of a spring and pressed against a valve seat. 4. The water jet nozzle device according to claim 1, wherein the check means is mounted at a position close to the nozzle. 5. The water jet nozzle device according to claim 1, wherein the water jet nozzle device is used for medical treatment including dental treatment. 6. A water jet nozzle according to any one of claims 1 to 5, a water jet nozzle and wherein the water supply pressure is ^{1kg / cm 2 ~2000kg / cm 2} .