JP2007289243A - Suction tip - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a suction tip which has a simple structure, is mounted on the distal end of a suction pipe during a dental treatment, efficiently sucks cutting debris of teeth, droplets, liquids in an oral cavity, or the like simultaneously, and is ergonomically excellent. <P>SOLUTION: The suction tip 1, which is mounted on the distal end of the suction pipe 10 during the dental treatment and sucks cutting debris of teeth, droplets, liquids in an oral cavity, or the like, is formed of a flexible member, and comprises a cylindrical base material part 2 having a prescribed inner diameter and a small-diameter pipe part 3 which is fixed by being inserted a prescribed length in an eccentric state where the proximal end part is inscribed to or partially buried in the inner wall of the base material part 2 from the distal end of the base material part and has a distal end part 3a protruding a prescribed length from the distal end 2c of the base material part 2. Furthermore, the base material part 2 has a protruding part 2a cut to form a shape of a slanting surface in the longitudinal direction in a manner that a distal end lower half part where the small diameter pipe part 3 is inscribed protrudes to the front. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a suction tip that is attached to the tip of a suction pipe of a suction machine during tooth treatment, and sucks intraoral fluids such as tooth cutting waste, splashes and saliva, washing water, chemicals, and blood.

  In recent years in cutting teeth and other dental treatments, a suction tip attached to the tip of a suction pipe is inserted into the oral cavity using a suction machine to suck cutting powder, cleaning fluid, saliva, blood or other liquid. Has been done.

Conventional typical suction tips include the following three examples (for example, Patent Documents 1, 2, and 3).
As shown in FIG. 8, the suction tip 20 of Patent Document 1 includes a tubular base material portion 21 and a flexible portion 22 made of a soft material provided at the front portion of the base material portion 21. An attachment portion 23 formed on the inner peripheral surface with an annular groove 25 snap-fitted to the annular protrusion 12 on the outer peripheral surface of the suction pipe 10 as a counterpart, and a thin, cylindrical core portion extending forward from the attachment portion 23 24, the flexible portion 22 covers at least the front end portion of the core portion 24 and extends forward from the core portion 24, and the front end opening edge of the flexible portion 22 forms a slope with respect to the axis.

  As shown in FIG. 9, the suction tip 1 of Patent Document 2 has a cylindrical light transmission attached to the tip of a suction pipe 14 provided in a suction machine that sucks teeth cutting waste generated during tooth cutting treatment. Made of sex material.

  As shown in FIG. 10, the suction tip of Patent Document 3 connects a flexible and shape-retaining loop tube 2 to a base 30, and a plurality of suction small holes 2 e are provided in the tube 2. A flexible tube 4 is connected, a hollow suction needle 4a is provided at the tip of the tube 4, and the connection port 3a of the base 3 can be connected to a dental vacuum device (suction machine).

Moreover, the spacer 5 is provided as needed. By applying the spacer 5 to the upper teeth and biting lightly, the position of the tube 2 can be stabilized and the state where the oral cavity is opened can be easily maintained.
Japanese Utility Model Publication No. 6-55612 JP-A-9-299386 JP-A-11-28219

  However, in the suction tip having the shape as described in Patent Documents 1 and 2, the suction tip is inserted into the oral cavity to suck cutting powder, liquid such as saliva and cleaning liquid, etc. In addition, after the suction of the cutting dust, the liquid or the like cannot be sufficiently sucked unless the tip of the suction tip is moved around the teeth, so that a large amount of liquid tends to remain in the oral cavity. For this reason, there has been a problem that a swallowing reflex that attempts to swallow the liquid in the oral cavity or a vomiting reflex due to recognition that the liquid in the oral cavity is a foreign object frequently occurs.

  Furthermore, when the dental hygienist closes the suction tip near the teeth or near the throat when the dental hygienist treats the oral fluid, particularly when the suction tip is in the vicinity of the teeth or the vicinity of the throat, the cutting edge by the drill and the cutting waste by the suction tip In addition, it is difficult to accurately perform the suction operation of the liquid in the oral cavity, especially ergonomics such as frequent occurrence of an unpleasant vomiting reflex due to insertion of the suction tip to the sensitive throat of the back teeth There was a problem.

  On the other hand, the suction tip of Patent Document 3 sucks the saliva, washing water, blood, liquid medicine, moisture, etc. in the oral cavity through the tube 2 during dental treatment and sucks the inside of the root canal after removing the nerve of the tooth. Although it can be cleaned and dried with the needle 4a, the structure is complex, and there is a problem that it is difficult to adapt to suction of cutting dust scattered especially during cutting of a toothpaste. .

  The present invention has been made to solve such problems, and has a simple structure and is attached to the tip of a suction pipe of a suction machine during tooth treatment. It is an object of the present invention to provide a suction chip that can efficiently and simultaneously suck water, chemical liquids, and intraoral fluids such as blood, and is excellent in ergonomics.

  In order to achieve the above object, the suction tip of the invention of claim 1 is attached to the tip of the suction pipe of the suction machine at the time of tooth treatment, and oral cavity such as tooth cutting waste, splash and saliva, washing water, chemical liquid, blood, etc. A suction chip for sucking an inner liquid or the like, each of which is made of a flexible member, and has a substantially cylindrical base part having a predetermined inner diameter, and a rear end part from the front end of the base part to the inner wall of the base part. It is characterized by comprising a small-diameter pipe portion that is inserted and fixed by a predetermined length in an incline or partially embedded eccentric state, and the tip portion projects from the tip of the base material portion by a predetermined length.

  A second aspect of the present invention is the suction tip according to the first aspect, wherein the base material portion is cut into a longitudinally inclined surface shape so that a lower half portion of the tip end inscribed by the small diameter tube portion extends forward. The extended portion is formed, and the distal end portion of the small-diameter pipe portion protrudes from the distal end of the extended portion by a predetermined length.

  A third aspect of the present invention is the suction tip according to the first or second aspect, wherein the small-diameter tube portion is inscribed or partially embedded in an inner wall of the base material portion and integrally molded. To do.

  According to a fourth aspect of the present invention, there is provided the suction tip according to the first or second aspect, wherein an engagement portion for engaging the small diameter tube portion is provided on the inner wall of the base material portion, and the engagement portion is provided with the engagement tip. The small-diameter pipe portion is engaged and attached.

  A fifth aspect of the present invention is the suction tip according to the fourth aspect, wherein the engaging portion has an inner diameter into which the small diameter tube portion can be inserted, and is connected or partially embedded in the inner wall of the base material portion. Thus, it is formed in a continuous eccentric ring shape.

  A sixth aspect of the present invention is the suction tip according to the first or second aspect, wherein the small-diameter tube portion is fixed to be inserted into the inner surface of the cylindrical portion of the base material portion on the outer diameter surface in the vicinity of the rear end portion. And the fixing portion is inserted and attached to the inner surface of the cylindrical portion of the base material portion.

  A seventh aspect of the present invention is the suction tip according to the fifth aspect, wherein the fixing portion is an outer diameter surface that can be inserted into the inner surface of the cylindrical portion of the base material portion on the outer diameter surface in the vicinity of the rear end portion of the small diameter tube portion. A part of the ring portion having a diameter is integrally formed into a continuous eccentric ring shape.

  According to the first aspect of the present invention, the small-diameter pipe portion has a predetermined length from the tip of the base portion in an eccentric state in which the suction tip connected to the suction pipe is inscribed or partially embedded in the inner wall of the substantially cylindrical base portion. Since it is provided so as to protrude, the cutting waste and splashes of teeth that mainly scatter from the tip opening of the base material part are sucked and the intraoral fluid stored from the tip part of the small diameter pipe part is sucked efficiently and simultaneously. can do. In this case, there is no need to place the base portion of the suction tip too close to the periphery of the teeth or the vicinity of the throat, unlike the conventional suction tip, and the small diameter tube portion can efficiently and efficiently suck the liquid in the oral cavity simultaneously. . For this reason, since liquid etc. do not remain in a patient's oral cavity, the patient does not cause the swallowing reflex to try to swallow the liquid or the vomiting reflex due to recognition that the oral liquid itself is a foreign object.

Also, even if the small-diameter tube portion is close to the vicinity of the teeth or the vicinity of the throat portion, the small-diameter tube portion is a thin member made of a flexible material such as silicone rubber. Rarely causes unpleasant vomiting reflexes in patients compared to suction tips.
In addition, it is not necessary to bring the base material part too close to the periphery of the conventional tooth or the vicinity of the throat because the thin small-diameter tube part protrudes from the tip of the extension part of the suction tip base material part. Therefore, compared with the conventional suction tip, the field of view of the small-diameter tube portion is widened, and it becomes easy to accurately and simultaneously perform treatment such as cutting with a drill and suction operations such as cutting waste, splashes and intraoral fluid with the suction tip. There are advantages.

  Thus, an ergonomically superior suction tip having the above advantages is provided with a simple structure in which the small-diameter tube portion is fixed in an eccentric state inscribed or partially embedded in the inner wall of the cylindrical base material portion. be able to.

  According to the invention of claim 2, in addition to having the same effect as that of the invention of claim 1, the extension that is cut and formed in an inclined surface shape so that the lower half of the tip of the base part extends forward Since the small-diameter pipe part protrudes from the tip of the part by a predetermined length, the suction performance of the chips and splashes that are scattered by improving the tip opening area of the base part is improved, and the suction tip base material Since a thin small-diameter tube is projected at the tip of the extension part, it is not necessary to place the base material part too close to the periphery of the conventional tooth or the vicinity of the throat part. Compared with the scope of the small-diameter tube section, the dental hygienist can perform treatment such as cutting with a drill at the time of tooth treatment and suction operations such as cutting waste, splashes and oral fluid with a suction tip at the same time. Usability is improved by making it easier to perform.

  According to the invention of claim 3, in addition to having the same effect as that of the invention of claim 1 or claim 2, the small diameter pipe part is inscribed or partially embedded in the inner wall of the base material part and integrally molded. Therefore, it is possible to provide a suction tip that is easily mass-produced and is excellent in productivity and economy.

  According to the invention of claim 4, in addition to having the same effect as that of the invention of claim 1 or 2, in addition to the configuration in which the small diameter pipe part is mounted on the engaging part provided on the inner wall of the base part. The structure of the base material is simple, so the productivity and economy are improved, and the length and thickness of the small diameter pipe can be changed freely, and the small diameter pipe can be replaced. The degree of freedom of design and usability is improved. In addition, a general-purpose silicon rubber tube can be used as the small-diameter tube portion, and versatility is improved. It is also possible to expand the application range of the suction tip, such as by forming the tip of the small-diameter tube part thinner and using it for root canal treatment that sucks the liquid in the root canal after removing the nerve of the tooth. is there.

  According to the invention of claim 5, in addition to having the same effect as that of the invention of claim 4, the engaging part of the inner wall of the base part is a ring-shaped simple structure into which a small diameter pipe part can be inserted. In addition, the productivity and economy of the suction tip, and the freedom of design and use are further improved.

  According to the invention of claim 6, in addition to having the same effect as that of the invention of claim 1 or claim 2, the small diameter pipe part is mounted by inserting the fixing part into the inner surface of the cylindrical part of the base part. Therefore, the base portion of the suction tip has a simple structure, and the shape such as the length and thickness of the small diameter tube portion can be freely changed, and the small diameter tube portion can be replaced. As in the fourth aspect of the invention, the productivity and economy of the suction tip, and the degree of freedom of design and usability are improved. Moreover, it is possible to attach this small diameter pipe part to a conventional general suction tip, and versatility is improved.

  According to the invention of claim 7, in addition to having the same effect as that of the invention of claim 6, the fixing part of the small diameter pipe part is a simple ring-shaped structure that can be inserted into the inner surface of the cylindrical part of the base part. As a result, the productivity and economy of the suction tip and the degree of freedom in design and use are further improved.

  Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.

  1 is a side view of a suction tip according to a first embodiment of the present invention, FIG. 2 is a front view seen from the front end side of the suction tip of FIG. 1, and FIG. 3 is a plan view seen from the upper side of the suction tip of FIG. .

  The suction tip 1 of Example 1 is a suction tip that is attached to the tip of a suction pipe of a suction machine at the time of tooth treatment and sucks tooth cutting waste and oral fluid such as saliva, washing water, chemicals, and blood. The cylindrical base part 2 and the small-diameter pipe part 3 inscribed in an eccentric manner in contact with the inner surface 2d of the base part 2 are roughly constituted. The suction tip 1 is an integrally molded product made of a flexible member such as sanitary silicon rubber, for example, for both the base portion 2 and the small diameter tube portion 3. In particular, there may be no suitable adhesive that can fix the members between the silicon rubbers, and it is preferable from the standpoint of mass production that the base portion 2 and the small-diameter pipe portion 3 are integrally formed.

  As shown in FIG. 1, the base material portion 2 is made of cylindrical silicon rubber having a predetermined inner diameter D, and is cut into a longitudinally inclined surface shape so that the lower half of the tip with which the small diameter tube portion 3 is inscribed extends forward. The extended portion 2a is formed. The reason why the extending portion 2a is cut and formed into an inclined surface will be described later.

  The small-diameter tube portion 3 is made of a thin tubular silicon rubber having a predetermined inner diameter d, and the rear end portion 3b is in a decentered state inscribed in an inner surface extending from the extending portion 2a of the base portion 2 to the inside of the cylindrical portion (= C + A) Inserted and integrally molded, and the tip 3a protrudes a predetermined length B from the tip of the extension 2a. Here, A is the length from the cylindrical portion tip 2c of the base member 2 to the tip of the extending portion 2a, and C is the length from the cylindrical tip 2c of the base member 2 to the rear end 3b of the small diameter tube portion 3. Length.

  In the dental treatment, the shape of the suction tip 1 is ergonomics such as treatment operability by a dental hygienist's cutting drill and suction tip, etc., suppression of unpleasant swallowing reflexes, vomiting reflexes, etc. and cutting of scattered teeth. This is determined from the results of repeated experiments in consideration of the suction performance of the waste and the oral fluid.

  The size of the base member 2, particularly the inner diameter D, is preferably larger from the viewpoint of suction performance such as tooth cutting scraps, but the visibility and treatment operability of dental hygienists, unpleasant swallowing reflexes and vomiting reflexes of patients, etc. From the viewpoint of ergonomics such as suppression of the outer diameter, a smaller outer diameter is preferable. Therefore, in order to improve the suction performance of cutting waste, it is desirable to enlarge the opening area by cutting the tip of the base material portion 2 obliquely. In addition, it expands the field of view of dental hygienists at the time of dental treatment, making it easy to perform treatments such as cutting with a drill and suction operations such as cutting waste, splashes, and oral fluid with a suction tip simultaneously. In order to improve this, it is desirable to form the tapered extension part 2a cut into an inclined surface so that the lower half of the tip of the base part 2 with which the small diameter pipe part 3 is inscribed extends forward.

  On the other hand, the size of the small-diameter tube portion 3, particularly the inner diameter d, is preferably larger from the viewpoint of the suction performance of oral fluid or the like, and the clogging prevention property due to tooth cutting scraps or bites, etc. From the viewpoint of ergonomics such as visibility, therapeutic operability, and suppression of unpleasant vomiting reflex and the like, it is preferable that the outer diameter is as small as possible.

  The length of the base member 2 is preferably relatively short in view of the visibility and treatment operability of the dental hygienist, but it is attached to the tip of the suction pipe 10 so as not to be easily removed during treatment (suction pipe insertion) It suffices if the length E is, for example, about twice the inner diameter D of the substrate 2.

FIG. 4 is an explanatory diagram schematically showing the airflow in the base material portion 2 of the suction tip 1.
The air flow sucked from the extended portion 2a at the tip into the base material portion 2 of the suction tip 1 is contracted near the tip 2c of the cylindrical portion and a vortex G is generated as shown by the streamline F in FIG. The average flow velocity in the direction is apparently smaller than the flow velocity of the cylindrical portion near the tip portion 11 of the suction pipe 10 and is rectified according to the depth of the cylindrical portion on the suction pipe 10 side. The streamline F becomes almost parallel in the axial direction, and the flow velocity increases and recovers. And, the well-known “the kinetic energy at the same position (energy) (= the square of the flow velocity × fluid density) and the static pressure is constant”, Bernoulli's law, the small-diameter pipe portion in the base portion 2 cylindrical portion 3 As the axial flow velocity around the rear end portion 3b increases, the static pressure around the rear end portion 3b decreases, and the suction force of the oral fluid from the small diameter tube portion 3 increases.

  For this reason, from the aspect of the suction performance for efficiently sucking the liquid in the mouth from the small diameter tube portion 3, the suction airflow from the extended portion 2a at the tip of the base material portion 2 is the rear end portion of the small diameter tube portion 3 in the base material portion 2 cylindrical portion. It is desirable that the flow line F be parallel flow in the axial direction around 3b so that the flow velocity is increased and recovered, and the length from the cylindrical portion tip 2c of the base material portion 2 to the rear end portion 3b of the small diameter tube portion 3 is desired. It is desirable that C has a length equal to or greater than the inner diameter D from the cylindrical portion tip 2c of the base portion 2. However, if the small-diameter tube portion 3 is too long, the flow resistance of the liquid in the small-diameter tube portion 3 increases and the suction performance of the liquid in the mouth decreases, so the rear end portion 3b of the small-diameter tube portion 3 from the cylindrical portion tip 2c. It is optimum that the length C is about the cylindrical portion inner diameter D.

  Further, the protruding length B from the distal end of the extending portion 2a to the distal end portion 3a of the small-diameter tube portion 3 allows the dental hygienist to treat the base portion of the suction tip simultaneously with the treatment such as tooth cutting with a drill when treating the teeth. The suction of the cutting waste from the extending portion 2a at the tip of the base material portion 2 and the liquid accumulated in the root of the tooth in the oral cavity from the tip 3a of the small diameter tube portion 3 is performed simultaneously. It is preferable that the height of the patient's teeth is about 6 mm.

  As a result of a dental treatment experiment using the suction tip 1 having various shapes in consideration of various conditions of the base material portion 2 and the small-diameter tube portion 3 as described above, a cylindrical base material portion 2 that is as simple as possible is suitable. The shape specifications are such that the inner diameter D is approximately 10 mm, which is substantially equal to the outer diameter 10 mm of the normal suction pipe 10, the outer diameter is approximately 14 mm, and the length A from the cylindrical portion tip 2c to the extension portion 2a tip is substantially equal to the inner diameter D. It was found that the total length from the rear end 2b of the cylindrical portion to the tip of the extended portion 2a was about 43 mm at about 10 mm.

  On the other hand, the preferred shape specifications of the small-diameter tube portion 3 are an inner diameter d of about 2 mm, a protruding length B from the tip 3a to the tip of the extended portion 2a of the base member 2 is about 6 mm, and the total length (= C + A + B) is about The outer shape is a tapered shape with an outer diameter of the rear end 3b of about 4 mm and an outer diameter of the tip 3a of about 3 mm. The outer diameter of the small-diameter pipe portion 3 is tapered, because the releasability from the integral mold is improved, and the tip of the small-diameter pipe portion 3 is made as thin as possible and the flexibility is increased accordingly. This is because there is an advantage that it is difficult to cause an unpleasant vomiting reflex even if the patient is close to the vicinity or the vicinity of the throat.

  The suction tip 1 having such a suitable shape specification has a small-diameter pipe portion 3 extending from the tip of the extending portion 2a formed in an inclined cut surface shape so that the lower half of the tip of the base material portion 2 extends forward. Is projected by a predetermined length (about 6 mm), so that the tip opening area of the extending portion 2a is enlarged, so that the performance of sucking scattered chips and droplets is improved and the conventional suction tip is used. In addition, it has been found that the intraoral fluid and the like can be efficiently and efficiently sucked from the distal end portion 3a of the small diameter tube portion 3 without excessively bringing the base portion 2 of the suction tip close to the periphery of the tooth or the vicinity of the throat.

  For this reason, since treatment such as cutting of the patient's teeth and suction of cutting dust and droplets are performed, liquid in the oral cavity is not sucked from the distal end portion 3a of the small-diameter tube portion 3 and remains. It was also found that neither the swallowing reflex that attempts to swallow nor the vomiting reflex due to the perception that the oral fluid itself is a foreign body.

  Further, the tip portion of the suction tip 1 is tapered with respect to the cylindrical portion due to the configuration of the extending portion 2a formed in an inclined cut surface shape and the small diameter tube portion 3 protruding from the tip of the extending portion 2a. When the dental hygienist's teeth are treated, the field of view of the small-diameter tube portion 3 is particularly widened, and the simultaneous operation of the treatment and the suction of cutting waste, splashes, and oral fluid with a suction tip is more accurately performed for cutting with a drill, etc. It became easy to carry out, and it was found that the suction tip 1 having the above-described configuration is excellent in ergonomics.

  5 is a side view of the suction tip according to the second embodiment of the present invention, and FIG. 6 is a front view of the suction tip as viewed from the front end side of FIG. Here, in order to make it easy to understand, even in the second embodiment, members having the same function are associated with the same reference numerals even if the shapes are partially different from those of the first embodiment.

  In the second embodiment, an engagement portion 2h that engages the small-diameter tube portion 3 is provided on the inner surface 2d of the base portion 2, and the small-diameter tube portion 3 is engaged and mounted on the engagement portion 2h. .

  As shown in FIG. 6, the engaging portion 2h has an inner diameter 2i into which the small-diameter tube portion 3 can be inserted, and has an appropriate length connected to the inner surface 2d of the base portion 2 cylindrical portion, for example, 5 mm, and a thickness of 0.5 mm. It is integrally molded in the form of a thin eccentric ring.

  Other suitable shape specifications of the base material portion 2 and the small diameter tube portion 3 of the second embodiment are exactly the same as those of the first embodiment.

  Therefore, in the second embodiment, in addition to having the same excellent advantages as those of the first embodiment, the small diameter pipe portion 3 is mounted on the engaging portion 2h provided on the inner surface of the base portion 2. The structure of the material part 2 is simplified, and the length and thickness of the small-diameter pipe part 3 can be freely changed, and the small-diameter pipe part 3 can be replaced freely. To do. Further, as the small-diameter pipe portion 3, a general-purpose silicon rubber tube can be used.

  Furthermore, the application range of the suction tip can be expanded, for example, by forming the distal end portion of the small-diameter tube portion 3 to be thinner and using it for root canal treatment in which the liquid in the root canal after the tooth nerve is removed is sucked. .

  FIG. 7 is a side view of the suction tip according to the third embodiment of the present invention, and FIG. 8 is a front view of the suction tip of FIG. Here, in order to make it easy to understand, in the third embodiment, members having the same function are associated with the same reference numerals even if the shapes are partially different from those of the first or second embodiment.

  In the third embodiment, the small-diameter pipe portion 3 includes a fixing member 3 h that can be inserted into the inner surface of the cylindrical portion of the base material portion 2 on the outer diameter surface in the vicinity of the rear end portion 3 b, and the fixing member 3 h is a cylinder of the base material portion 2. It is the structure inserted and mounted in the part inner surface.

  As shown in FIG. 8, the fixing member 3 h has an outer diameter that can be inserted into the inner surface of the cylindrical portion of the base portion 2 on the outer diameter surface in the vicinity of the rear end portion 3 b of the small-diameter pipe portion 3. A part of a thin ring portion having an appropriate length (for example, approximately 5 mm) and a thickness of approximately 0.5 mm is integrally formed into a continuous eccentric ring shape.

  The other suitable shape specifications of the base material portion 2 and the small diameter tube portion 3 of the third embodiment are exactly the same as those of the first embodiment.

  Therefore, in Example 3, in addition to having the same excellent advantages as in Example 1, the small diameter pipe part 3 is mounted by inserting the fixing member 3h into the inner surface of the cylindrical part of the base part 2. Because of the structure, the base portion 2 of the suction tip 1 has a simple structure, the shape such as the length and thickness of the small diameter tube portion 3 can be freely changed, and the small diameter tube portion 3 can be replaced. As in the second embodiment, the design of the suction tip 1 and the degree of freedom in use are improved. Moreover, it becomes possible to attach this small diameter pipe part 3 to a conventional general suction tip, and versatility is improved.

  Furthermore, the application range of the suction tip can be expanded, for example, by forming the distal end portion of the small-diameter tube portion 3 to be thinner and using it for root canal treatment in which the liquid in the root canal after the tooth nerve is removed is sucked. .

  9 is a side view (cross section) of the suction tip according to the fourth embodiment of the present invention, FIG. 10 is a front view seen from the front end side of the suction tip of FIG. 9, and FIG. 11 is a plan view seen from the upper side of the suction tip of FIG. FIG. Here, in order to make it easy to understand, even in the fourth embodiment, members having the same function are associated with the same reference numerals even if the shapes are partially different from those of the first embodiment.

  In the fourth embodiment, similarly to the first embodiment, the small-diameter pipe portion 3 is integrally formed in an eccentric state in which the small-diameter pipe portion 3 is inscribed or partially embedded in the inner surface 2d of the base portion 2, and The outer diameter shapes of the extended portion 2a and the small diameter tube portion 3 are slightly different from those of the first embodiment.

  That is, as shown in FIG. 9, the outer peripheral surface of the extension portion 2 a is formed in a partial conical surface shape that is inclined in the front end direction from the cylindrical portion front end 2 c so that the front end is in contact with the outer peripheral surface of the small-diameter pipe portion 3. . The small-diameter tube portion 3 has a straight thin tube shape with an outer diameter of about 3 mm with respect to an inner diameter of about 2 mm.

  The other suitable shape specifications of the base material portion 2 and the small diameter tube portion 3 of the third embodiment are exactly the same as those of the first embodiment.

  Therefore, in Example 4, in addition to having the same superior advantages as in Example 1, the structure is slimmer from the extending part 2a to the distal end of the small-diameter pipe part 3. The field of view of the small-diameter pipe portion 3 is particularly wide when treating hygienist teeth, and more accurate simultaneous operations such as the treatment of cutting with a drill and the suction of cutting debris, splashes and oral fluid with a suction tip, etc. It became easy, and it became clear by the dental treatment experiment that the suction tip 1 having the above-described configuration was further superior in ergonomics.

  In addition, the suction tip 1 of the present invention can be arbitrarily changed in shape, such as the length and thickness of the base material portion 2 or the small diameter tube portion 3 or the material of the member, in addition to the embodiments shown in FIGS. Can be configured. For example, a suction chip that is more ergonomically suitable using a flexible member having a partially different hardness, such as a soft member such as a soft silicone rubber for the small-diameter tube portion 3 compared to the base material portion 2. 1 can also be configured.

It is a side view of the suction tip of Example 1 of the present invention. It is the front view seen from the front end side of the suction tip of FIG. It is the top view seen from the upper side of the suction tip of FIG. It is explanatory drawing which shows typically the air flow in the base-material part of the suction tip of FIG. It is a side view of the suction chip of Example 2 of the present invention. It is the front view seen from the front end side of the suction tip of FIG. It is a side view of the suction chip of Example 3 of the present invention. It is the front view seen from the front end side of the suction tip of FIG. It is a side surface (cross section) figure of the suction tip of Example 4 of this invention. It is the front view seen from the front end side of the suction tip of FIG. It is the top view seen from the upper side of the suction chip | tip of FIG. It is a side view (sectional view) of the suction tip of the conventional patent document 1. It is a side view (sectional view) of the suction tip of the conventional patent document 2. It is a top view of the suction tip of the conventional patent document 3.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Suction tip 2 Base part 2a Extension part 2b, 3b Rear end part 2c Cylindrical part front end 2d, 2i, 3i Inner diameter surface or inner surface 2h Engagement part 3 Small diameter pipe part 3a, 11 End part 3h Ring-shaped fixing member 10 Suction Pipe F Streamline G Vortex

Claims (7)

A suction tip that is attached to the tip of a suction pipe of a suction machine at the time of tooth treatment, and sucks oral fluid such as tooth cutting waste, splashes and saliva, washing water, chemicals, blood, etc.
Both are made of flexible members,
A substantially cylindrical base material portion having a predetermined inner diameter;
The rear end portion is inserted and fixed for a predetermined length in an eccentric state in which the rear end portion is inscribed or partially embedded in the inner wall of the base material portion, and the front end portion is fixed to the predetermined length from the front end of the base material portion. A suction tip characterized by comprising a narrow tubular small-diameter tube portion protruding. The base part is formed with an extension part that is cut into a longitudinally inclined surface so that the lower half of the tip with which the small-diameter pipe part is inscribed extends forward,
The suction tip according to claim 1, wherein a distal end portion of the small diameter tube portion protrudes from a distal end of the extension portion by a predetermined length.   The suction tip according to claim 1 or 2, wherein the small-diameter tube portion is inscribed or partially embedded in an inner wall of the base material portion and integrally molded.   The engagement part which engages the said small diameter pipe part is provided in the inner wall of the said base material part, The said small diameter pipe part is engaged and mounted | worn with this engagement part, The Claim 1 or Claim characterized by the above-mentioned. 2. The suction tip according to 2.   The engagement portion has an inner diameter into which the small-diameter tube portion can be inserted, and is formed in a continuous eccentric ring shape so as to be connected or partially embedded in an inner wall of the base material portion. Item 5. The suction tip according to Item 4.   The small-diameter pipe portion includes a fixing portion that can be inserted into the inner surface of the cylindrical portion of the base material portion on the outer diameter surface near the rear end thereof, and the fixing portion is inserted into the inner surface of the cylindrical portion of the base material portion and attached. The suction tip according to claim 1, wherein the suction tip is provided.   The fixing portion is integrally formed in an eccentric ring shape in which a part of a ring portion having an outer diameter that can be inserted into the inner surface of the cylindrical portion of the base material portion is continuous with an outer diameter surface in the vicinity of the rear end portion of the small-diameter pipe portion. The suction tip according to claim 5, wherein the suction tip is provided.

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