JP4711720B2 - Maintenance spray nozzle - Google Patents

Description

  The present invention relates to a spray nozzle for maintenance of a dental handpiece for medical use, and more specifically, is attached to an oil discharge portion of a spray can loaded with maintenance oil, and a bearing portion and a gear portion in the handpiece, Further, the present invention relates to a maintenance spray nozzle for supplying oil to a gripping part (chuck part) of a cutting tool to maintain lubricity or to discharge sludge and the like.

  Dental handpieces such as air turbine handpieces and micromotor handpieces have a body part or a head part such as a drive transmission part or a bearing part for rotating a chuck and a cutting tool held by the chuck at high speed. The mechanism is built in. In such a mechanism portion, lubricating oil is filled or attached so that the high-speed rotation of the cutting tool is smoothly performed. Thus, the smooth rotation may not be achieved due to loss of lubricating oil or mixing of sludge after long use. Therefore, on the user side, a dedicated nozzle connector is attached to the spray can loaded with lubricating oil, and the lubricating oil is injected and injected from the base of the body of the handpiece main body or from the chuck portion to reach the mechanism portion. Or, maintenance that drains sludge and the like has been performed.

  It is effective that the lubricating oil is injected from the base of the body part of the handpiece body and from the tip of the chuck portion. Therefore, these two types of injection are usually performed as a set. Therefore, two types of nozzle connectors are prepared: a nozzle connector for inserting the handpiece body barrel and a nozzle connector for inserting the cutting tool gripping portion. During maintenance, these two types of nozzle connectors are replaced and used by being attached to a spray can. It was. However, such replacement and installation work is cumbersome, and since the two types of nozzle connectors are separate, both connectors are in separate positions during storage or one of them is lost. When carrying out maintenance work, there was also a problem in terms of storage and efficiency that both were not immediately available.

  The present invention has been made in view of the above, and it is an object of the present invention to provide a novel spray nozzle for maintenance of a medical handpiece that is easy to handle and excellent in storability.

  The maintenance spray nozzle according to the invention of claim 1 is a maintenance spray nozzle for a medical handpiece that is detachably attached to an oil discharge part of a spray can loaded with maintenance oil for a medical handpiece. A mounting base that includes a conduit communicating with the discharge port of the oil discharge portion and is detachably mounted on the oil discharge portion; and two valve holes having different directions from each other. A valve body that is rotatably coupled so that any one of the valve body is connected to the pipe line, and a nozzle connector for inserting a handpiece body trunk portion that is attached to the outlet side of the one valve hole in the valve body, It comprises a nozzle connector for inserting a cutting tool gripping part mounted on the outlet side of the other valve hole in the valve body.

  In the present invention, as in the invention of claim 2, it is desirable that the nozzle connector for inserting the handpiece body trunk portion is detachably attached to the valve body. According to a third aspect of the present invention, when the nozzle connector for inserting the handpiece body trunk is inserted and connected to the handpiece body trunk, the oil discharged from the nozzle port of the nozzle connector is contained in the handpiece body trunk. It is desirable that a seal member is appropriately fitted to the peripheral body of the nozzle connector so as not to enter any part other than the predetermined part.

  As in the invention of claim 4, the valve body can be provided with a lever for rotating operation. Further, as in the invention of claim 5, a seal member as a valve seat can be interposed in the rotational sliding contact portion of the valve body at the conduit outlet portion of the mounting base. In addition, as in the invention of claim 6, when the valve body is set so that the one valve hole is connected to the pipe line of the mounting base, lock locking means for stably maintaining the set state is provided. It can also be provided on the mounting base and the valve body.

  According to the first aspect of the present invention, the valve body that is rotatably coupled to the mounting base that is detachable with respect to the oil discharge port of the spray can includes the nozzle connector for inserting the handpiece main body and the cutting tool grip. As described above, one of the two valve holes in the valve body is connected to the pipe line of the mounting base by the rotation operation of the valve body. When performing maintenance of a handpiece, the desired nozzle connector can be connected to the pipe of the mounting base by simply mounting the mounting base on the oil discharge port of the spray can and rotating / switching the valve body. it can. Therefore, unlike the prior art, the troublesome work of replacing and mounting the two types of nozzle connectors is not necessary even during maintenance of one handpiece, and the mental burden of the maintenance work is reduced. In addition, since the mounting base, the valve body, and the two types of nozzle connectors are handled as a single unit, the storage is good and the parts are always in place during maintenance work, so that the efficiency of the work is not impaired. .

  Moreover, when the nozzle connector for inserting the handpiece body trunk portion is detachable from the mounting base as in the invention of claim 2, the type of handpiece (such as an air turbine handpiece, a micromotor handpiece, etc.) By preparing various types of nozzle connectors according to the type or the manufacturer's specifications, etc., the nozzle connector can be appropriately replaced and mounted, and the correspondence according to the type of the handpiece is also made appropriate. Furthermore, as in the invention of claim 3, if the seal member is appropriately fitted to the peripheral body of the nozzle connector for inserting the handpiece body trunk part, for example, when the target is an air turbine handpiece, Since the oil can be injected and injected only into the air pipe that leads to the oil pipe and the oil can be prevented from entering the other water injection pipes and the like, there is no fear that problems after maintenance occur.

  If a lever for rotating the valve body is attached to the valve body as in the fourth aspect of the invention, the nozzle connector can be easily switched by this lever operation, and the handleability is further improved. Further, as in the fifth aspect of the present invention, if a seal member as a valve seat is interposed in the rotational sliding contact portion of the valve body at the pipe outlet portion of the mounting base portion, oil leakage at this portion is prevented. Is done. Then, by configuring the seal member with an elastic material such as an O-ring, a friction force acts on the rotational sliding contact portion, giving a click feeling to the rotational operation, and stable rotational switching can be achieved. Further, if the lock base is provided on the mounting base and the valve body as in the sixth aspect of the invention, the valve body does not rotate unexpectedly during oil injection maintenance, and the oil does not leak.

  Hereinafter, the best mode of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing an example of a maintenance spray nozzle according to the present invention, and FIGS. 2 is a partial cross-sectional view showing a use state of the maintenance spray nozzle, FIG. 3 is a partial cross-sectional view showing another use state of the maintenance spray nozzle, FIG. 4 is an exploded view thereof, and FIGS. (C) is an enlarged longitudinal sectional view of a main part showing a modification of the nozzle connector for a cutting tool gripping part.

  2 and 3, maintenance oil is loaded in a spray can (spray container) 1 in a highly compressed state. When the upper discharge nozzle 1a is pushed down, an internal valve (not shown) opens and oil is discharged. Has been made. A spray cap 2 is attached to the upper end of the spray can 1 including the discharge nozzle 1a. The spray cap 2 swings up and down with elastic deformation when pressed in the direction indicated by the white arrow in the figure. A pressing piece 2a is formed. A hollow operating element 2b is formed on the lower surface of the pressing piece 2a so as to cover the upper end of the discharge nozzle 1a, and the hollow part of the operating element 2b is an operating surface 2c formed in a tapered shape. . The operating surface 2c is in contact with the front edge of the discharge nozzle 1a and communicates with an inner cylinder portion 2e of an oil discharge cylinder (oil discharge section) 2d in which the hollow portion extends in the lateral direction. Accordingly, when the pressing piece 2a is pressed in the direction indicated by the white arrow, the discharge nozzle 1a is pushed down by operating the actuator 2b, and the oil in the spray can 1 passes through the inner cylinder portion 2e of the oil discharge cylinder 2d. , And is discharged from the discharge port 2f.

  A male screw portion 2g is formed on the front side portion of the oil discharge cylinder 2d, and a mounting base portion 3 to be described later engages the female screw portion 3a formed at the base end portion with the male screw portion 2g to discharge oil. The cylinder 2d is detachably attached. That is, the maintenance spray nozzle A according to the present invention includes a mounting base 3 that is detachably mounted on the oil discharge cylinder 2d, a valve body 4 that is rotatably coupled to the mounting base 3, and the valve Two types of handpiece body barrel insertion nozzle connectors (hereinafter referred to as first nozzle connectors) 5 and cutting tool gripping portion insertion nozzle connectors (hereinafter referred to as second nozzle connectors) 6 to be mounted on the body 4; Is the basic configuration. The mounting base 3 includes a pipe line 3b that communicates with the discharge port 2f when the female screw part 3a is screwed into the oil discharge cylinder 2d, and an O-ring serving as a valve seat is provided at the outlet of the pipe line 3b. (Seal member) 3c is mounted. Since the outlet portion is located at the rotational sliding contact portion of the valve body 4, the outlet portion has a curved surface centered on the rotational center of the valve body 4. Accordingly, the O-ring 3 c is also formed in a shape along the curved surface. .

  Two parallel support plates 3d and 3d are coupled to the front side portion of the mounting base 3, and a valve 4b is interposed between the support plates 3d and 3d with the pin 4a as a rotation center. The body 4 is coupled and held so as to be rotatable. The rotational sliding contact portion of the valve body 4 with the outlet portion of the pipe line 3b is a curved surface 4b centered on the pin 4a. The valve body 4 is formed with two valve holes 4c and 4d which are orthogonal to each other, and the inlet side openings of these valve holes 4c and 4d are located on the curved surface 4b. The outlet sides of the valve holes 4c and 4d are joined to the first nozzle connector 5 and the second nozzle connector 6 as described later. A connection cylinder 4e concentrically including a valve hole 4c is extended at one part of the valve body 4, and a male screw part 4f is formed on the front side thereof.

  A lever 7 for rotating the valve body 4 around the pin 4a is further attached to another part of the valve body 4. An engaging protrusion 8a is provided in the middle of the lever 7. On the other hand, an engaging claw 8b having a triangular cross section is formed on the inner side of the support plates 3d and 3d, and is engaged with the engaging protrusion 8a. The lock claw means 8 is constituted by the joint claw 8b. The lock locking means 8 functions to stably maintain the set state when the valve hole 4c and the pipe line 3b of the mounting base 3 are connected and set.

  The first nozzle connector 5 is formed of a cylindrical member, and has a female screw portion 5a that is screwed into the male screw portion 4f of the connection tube 4e at its base portion, and an inner cylinder portion that serves as an oil supply conduit 5b. 5b communicates with the nozzle port 5c formed in the centrifugal direction at the step portion of the front side portion. The nozzle port 5c is opened at a step portion with a small diameter portion in the peripheral body of the first nozzle connector 5, so that the oil supplied through the oil supply conduit 5b is poured out from the nozzle port 5c. Has been made. In addition, O-rings (seal members) 5d and 5e are fitted on the periphery of the different diameter portions before and after the formation site of the nozzle port 5c. The second nozzle connector 6 is made of a thin metal tube and is press-fitted into the valve hole 4d. A nozzle hole 6a is drilled in the front side portion.

  An example of use of the maintenance spray nozzle A having the above configuration will be described. A handpiece 9 as a maintenance target shown in FIGS. 2 and 3 is a dental air turbine handpiece, and includes a handpiece main body body portion 10 and a head portion 11. The base part of the main body body part 10 is a connector part 10a for connecting a working medium supply hose (not shown) in which an air supply tube, an optical fiber for illumination, and the like are bundled. In FIG. 2, the working medium supply hose is removed. Show. An air supply pipe line 10b and an optical fiber 10c extending to the head part 11 are disposed in the handpiece main body body part 10. When the working medium supply hose is connected, the air supply pipe in the working medium supply hose is connected. In addition, the optical fiber for illumination, the air supply pipe line 10b and the optical fiber 10c in the handpiece main body 10 are respectively joined.

  An air turbine 11b integrated with a cutting tool chuck (gripping part) 11a, and a bearing 11c that supports the air turbine 11b and the chuck 11a so as to be rotatable are incorporated in the head part 11. A tooth cutting tool 12 is detachably mounted on the chuck 11a. Reference numeral 11d denotes a chuck release button for releasing the chuck of the chuck 11a, and a detailed description of the mechanism is omitted. The air supply pipe line 10b extends to the vicinity of the air turbine 11b, and the air turbine 11b rotates at high speed due to the pressure of the air ejected from the front end part. The tip of the optical fiber 10c extends to the neck portion of the head portion 11, and the light irradiation portion is directed to the tip portion of the cutting tool 12. The hollow portion 10d of the handpiece main body 10 also serves as a return path for the ejected air.

When carrying out such maintenance of the handpiece 9, first, the working medium supply hose is removed from the handpiece main body barrel 10, then the first nozzle connector 5 that matches the air turbine handpiece 9 is selected, and the first The nozzle connector 5 is attached to the joint cylinder 4e of the valve body 4 by screwing the male screw portion 4f and the female screw portion 5a. The mounting base 3 is mounted on the oil discharge cylinder 2d of the spray cap 2 by screwing the male screw 2g and the female screw 3a, and the lever 7 is operated to rotate the valve body 4 around the pin 4a. Then, the valve hole 4c and the pipe line 3b of the mounting base 3 are set to a straight position. During operation of the lever 7, the support plate 3d engaging piece 8a acts on the engaging claw 8b, 3d flaring outwardly elastically, where the engagement piece 8a rides over the engagement claws 8b, the support The plates 3d and 3d are restored, and the engagement pieces 8a and the engagement claws 8b are engaged with each other, so that the set state is stably maintained. In addition, since the O-ring 3c is interposed in the rotational sliding contact portion of the valve body 4 with the mounting base 3, the rotational operation gives a click feeling and the rotational operation is performed. Made stable.

  FIG. 2 shows an example in which maintenance oil is discharged and injected into the handpiece body body 10 using the first nozzle connector 5. That is, the first nozzle connector 5 of the maintenance spray nozzle A mounted on the oil discharge cylinder 2d of the spray cap 2 as described above is pushed and inserted into the handpiece body barrel 10 from its base. In the fully pushed state, the oil nozzle port 5 c is located at the base inlet position of the air supply conduit 10 b, and between the inner wall of the handpiece body body 10 and the step portion of the first nozzle connector 5. It communicates with the circumferential groove 10e to be formed. The front and back of the circumferential groove 10e are sealed from the inner wall of the handpiece main body 10 by O-rings 5d and 5e.

  Thus, when the pressing portion 2a of the spray cap 2 is pressed in the direction indicated by the white arrow, oil is discharged from the discharge nozzle 1a of the spray can 1, and the oil is discharged from the inner tube portion 2e of the oil discharge tube 2d, The discharge port 2f, the pipe line 3b of the mounting base 3, the valve hole 4c of the valve body 4 and the oil supply pipe line 5b of the first nozzle connector 5 reach the nozzle port 5c. The oil reaching the nozzle port 5c flows from the circumferential groove 10e into the air supply pipe line 10b in the handpiece main body body part 10, and from its tip part, the chuck 11a in the head part 11, the air turbine 11b, and the bearing 11c. And sprayed to the periphery thereof. Accordingly, oil as a lubricant is replenished to these portions, and attached fine sludge and the like are removed and discharged. Excess oil is discharged to the outside through each gap. Since the front and back of the circumferential groove 10e are sealed by the O-rings 5d and 5e, the oil does not enter any part other than the air supply pipe line 10b. Therefore, there is no concern that these parts are contaminated by the oil. .

  FIG. 3 shows an example in which maintenance oil is discharged and injected from the chuck 11 a using the second nozzle connector 6. That is, the handpiece 9 is removed from the state of FIG. 2, and the lever 7 is rotated counterclockwise against the locking elasticity of the lock locking means 8, so that the valve hole 4d is mounted on the mounting base as shown in FIG. The valve body 4 is set at a position that is straight in the 3 pipeline 3b. FIG. 1B shows a state in the middle of shifting to the state of FIG. When the second nozzle connector 6 is inserted into the chuck 11a from which the cutting tool 12 has been removed and the pressing portion 2a of the spray cap 2 is pressed in the direction indicated by the white arrow, the spray can 1 is discharged. Oil is discharged from the nozzle 1a, and the oil passes through the inner cylinder part 2e of the oil discharge cylinder 2d, its discharge port 2f, the pipe line 3b of the mounting base 3, and the valve hole 4d of the valve body 4, and then the second nozzle connector 6 From the nozzle hole 6a to the inner surface of the chuck 11a. By this injection, oil enters the sliding portion of the chuck mechanism from the slit portion of the chuck 11a, and the lubricity of this portion is improved, or the adhered sludge is removed and discharged. Excess oil is discharged from the gap between the chuck 11a and the second nozzle connector 6 or the like.

  Since the use switching of the first nozzle connector 5 and the second nozzle connector 6 is performed by the turning operation of the lever 7, it is extremely simple and the work efficiency is improved. In addition, since each of the above-mentioned parts constituting the maintenance spray nozzle A is assembled in a set, the storability is good and the parts are less likely to be lost. In addition, since the first nozzle connector 5 is detachable from the valve body 4, not only the air turbine handpiece described above, but also a micromotor handpiece and a connector adapted to various handpiece shapes depending on the manufacturer's specifications are prepared. In addition, it can be conveniently selected and used according to the handpiece. In the case of a micromotor handpiece, a gear train of an idler gear, a drive shaft, etc. are arranged from the base part of the body part of the handpiece body to the head part, and oil is applied not only to the bearing part of the head part but also to this drive transmission part. By spraying, lubricity can be improved or sludge can be removed.

  5A, 5B, and 5C show various modifications of the second nozzle connector 6, and the second nozzle connector 6 in the example of FIG. 5A has a tip of a metal thin tube whose tip is closed. A nozzle hole 6a is perforated in the vicinity peripheral wall portion. In the second nozzle connector 6 in the example of (b), when a plurality of protrusions 6b are formed on the peripheral wall portion and inserted into the chuck 11a, the second nozzle connector 6 in the example of (a) is placed between the inner surface of the chuck 11a. A gap is secured to expel excess oil. The second nozzle connector 6 in the example of (c) has a nozzle hole 6a drilled in the tip closing wall, and a plurality of concave grooves 6 along the longitudinal direction are formed on the surface of the peripheral wall portion. A gap is secured between the two so as to facilitate the discharge of excess oil. These are appropriately selected and adopted as a category of design matters.

  In the above embodiment, the dental handpiece is used as a maintenance target. However, the present invention is not limited to this, and it goes without saying that the present invention is applicable to various medical handpieces for otolaryngology. Further, even when the second nozzle connector 6 shown in FIG. 3 is used, a locking means similar to the lock locking means 8 can be provided on the mounting base 3 and the valve body 4 in order to maintain this set state. It is.

It is a perspective view which shows an example of the spray nozzle for maintenance of this invention, (a) (b) shows the switching state. It is a fragmentary longitudinal cross-section which shows the use condition of the spray nozzle for the maintenance. It is a fragmentary longitudinal cross-section which shows another use condition of the spray nozzle for maintenance. It is an exploded view of the spray nozzle for maintenance. (A) (b) (c) is an expanded vertical sectional view of the principal part which shows the modification of the nozzle connector for cutting tool holding parts.

Explanation of symbols

1 Spray can 2d Oil discharge cylinder (oil discharge part)
2f Discharge port 3 Mounting base 3b Pipe line 3c O-ring (seal member)
4 Valve body 4b Rotating sliding contact portion 4c Valve hole 4d Valve hole 5 First nozzle connector (nozzle connector for handpiece body trunk insertion)
5c Nozzle port 5d O-ring (seal member)
5e O-ring (seal member)
6 Second nozzle connector (nozzle connector for cutting tool gripping part insertion)
7 Lever 8 Locking means 9 Air turbine handpiece (medical handpiece)
10 Handpiece body 11a Chuck (Cutting tool gripping part)
A Maintenance spray nozzle

Claims (6)

A medical handpiece maintenance spray nozzle that is detachably attached to an oil discharge part of a spray can loaded with maintenance oil for a medical handpiece,
A mounting base that includes a conduit that communicates with the discharge port of the oil discharge unit and that is detachably mounted on the oil discharge unit; and two valve holes that have different directions from each other. A valve body rotatably coupled so that any one of them is connected to the pipe line, and a nozzle connector for inserting a handpiece body body portion mounted on an outlet side of the one valve hole of the valve body. A spray nozzle for maintenance of a dental handpiece, characterized by comprising a cutting tool gripping part insertion nozzle connector mounted on the outlet side of the other valve hole in the valve body. The maintenance spray nozzle according to claim 1,
The maintenance spray nozzle, wherein the handpiece main body body insertion nozzle connector is detachably attached to the valve body. In the maintenance spray nozzle according to claim 1 or 2,
When the nozzle connector for inserting the handpiece body trunk is inserted and connected to the body of the handpiece body, the oil discharged from the nozzle port of the nozzle connector for inserting the handpiece body trunk is a predetermined part in the body of the handpiece body. The maintenance spray nozzle is characterized in that a seal member is fitted to the periphery of the nozzle connector for inserting the body part of the handpiece main body so as not to enter any other part. In the maintenance spray nozzle according to any one of claims 1 to 3,
A maintenance spray nozzle, wherein the valve body is provided with a lever for rotating operation. The maintenance spray nozzle according to any one of claims 1 to 4,
A maintenance spray nozzle, characterized in that a seal member as a valve seat is interposed in a rotational sliding contact portion of the valve body at the outlet portion of the pipe line of the mounting base. The maintenance spray nozzle according to any one of claims 1 to 5,
When the valve body is set so that the one valve hole is connected to the pipe line of the mounting base, a lock locking means for stably maintaining the set state is provided on the mounting base and the valve body. A maintenance spray nozzle characterized by

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