JP2017006385A - Medical care suction tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce adsorption of a soft tissue, when sucking a substance such as saliva.SOLUTION: A medical care suction tool comprises: a cylindrical part 3; a first extension part 4 which extends from the cylindrical part in a prescribed extension direction so that a first suction opening 44 formed by a first end edge part 10 communicates with an inner space; a second extension part 5 which extends in a prescribed extension direction so that a second suction opening 46 formed in the first suction opening by a second end edge part 14 communicates with the inner space, and which is connected to an inner peripheral face of the cylindrical part or the first extension part; and a connection part 6 for connecting facing surfaces of both extension parts. The first end edge part extends in an inclined state to a tip end part 12 from an end edge part which is closest to the cylindrical part. The second end edge part extends in an inclined state along the first end edge part. A tip end part 16 of the second end edge part is arranged on a position which is extended longer than a segment connecting the end edge part of the first end edge part closest to the cylindrical part and the tip end part of the first end edge part, and which is retreated relative to the tip end part of the first end edge part.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a medical suction tool used for sucking saliva and blood generated in the body of a living organism such as a human being and an animal, or a liquid substance such as a cooling fountain, or a solid substance such as cutting waste. . More specifically, the present invention relates to a medical suction tool that can reduce the adsorption of soft tissues in the body, such as the tongue and organs, when sucking a substance from the body of a living organism.

  2. Description of the Related Art Conventionally, medical suction tools having various configurations have been proposed as a medical suction tool used for sucking substances such as saliva. For example, the covering member described in Patent Document 1 is attached to an end portion of a tubular member connected to a compressor in order to suck a substance such as saliva in the oral cavity of a patient. The covering member is made of a soft material such as silicon rubber. The cover member includes a cylindrical portion, a discharge opening into which the tubular member is inserted, and an inlet side opening. The inlet side opening is provided in a state inclined with respect to the axial direction of the cylindrical portion. The protruding piece is provided at the inlet side opening so as to protrude from the tubular portion toward the distal end of the covering member at the distal end portion and the lower portion of the covering member. In order to restrict the sucked solid matter from moving toward the discharge opening, a restricting portion is provided inside the cylindrical portion. The restricting portion includes a plate-like member connected to the upper end portion and the lower end portion of the inner peripheral surface of the cylindrical portion.

  Generally, when aspirating saliva or the like in a patient's oral cavity, the protruding piece of the covering member is disposed below so as to be immersed in the saliva in the oral cavity and pressed against the inner wall of the oral cavity. At the time of this pressing, the plate-like member of the restricting portion can reduce the collapse of the cylindrical portion of the covering member due to the pressing load.

  Further, the suction tip described in Patent Document 2 is attached to a suction pipe connected to a suction machine in order to suck a substance such as saliva in the oral cavity of a patient. The suction tip is integrally formed from a flexible member such as silicon rubber. The suction tip includes a cylindrical base material portion and a small diameter tube portion. A base material part has the extension part cut | disconnected by the longitudinal direction inclined surface shape. The small-diameter pipe portion is formed in an eccentric shape inscribed in the inner surface of the base material portion, and protrudes from the extending portion. The length that the small-diameter pipe part protrudes from the extension part is approximately the height of the patient's teeth, and is about 6 mm. The inner diameter of the small diameter tube portion is about 2 mm.

  When the suction tip described in Patent Document 2 is used for dental practice, the cutting waste is sucked from the extending portion at the tip of the base material portion, and at the same time, the liquid accumulated in the root portion of the tooth in the oral cavity is the small diameter tube portion It is sucked from the tip.

JP 2014-184097 A Japanese Patent No. 49851717

  In the covering member described in Patent Document 1, when the protruding piece of the covering member is inserted to the back of the oral cavity, the inner wall of the oral cavity or a soft tissue such as the tongue may be adsorbed to the entrance-side opening. . If the tissue is adsorbed, the medical care must be interrupted.

  In the suction tip described in Patent Document 2, since the small-diameter tube portion of the suction tip protrudes greatly from the extension portion, the soft-tissue is not adsorbed by the suction opening of the extension portion, and the small-diameter tube portion is The liquid substance such as saliva collected in the back of can be sucked. However, in order to suck solid substances such as cutting waste generated in the back of the oral cavity by the extending portion, a large-diameter small-diameter tube portion may become an obstacle.

  Therefore, the present invention has been made in view of the above circumstances, and can smoothly suck a substance such as saliva or cutting waste, and reduce the adsorption of a soft tissue during suction. An object of the present invention is to provide a medical suction tool that can be used.

  According to a first aspect of the present invention, a cylindrical portion having an internal space and extending in a predetermined longitudinal direction, and a first suction opening for sucking a substance such as saliva or cutting waste from the body are provided. A first extending portion having a first edge portion to be formed and extending in a predetermined extending direction parallel to a predetermined longitudinal direction from the tubular portion so that the first suction opening communicates with the internal space; saliva; Alternatively, a second suction edge for forming a second suction opening for sucking a substance such as cutting waste from the body is formed in the first suction opening, and the second suction opening communicates with the internal space. A second extension portion extending in the extension direction and connected to the inner peripheral surface of the cylindrical portion or the inner peripheral surface of the first extension portion; and a first extension in a direction orthogonal to the predetermined extension direction And a connecting portion for connecting mutually opposing surfaces between the first extending portion and the second extending portion, wherein the first edge portion is a portion of the first edge portion. Extending from the edge portion closest to the cylindrical portion to the most extending tip portion of the first edge portion with an inclination with respect to a predetermined extending direction, and the second edge portion is The first end edge extends in an inclined direction with respect to a predetermined extending direction along the inclined direction of the one end edge portion, and the most extended tip portion of the second end edge portions is the first end edge in the predetermined extending direction. A position extending from the line segment connecting the edge portion closest to the cylindrical portion of the portion and the most extending tip portion of the first edge portion, and the first edge It arrange | positions in the retracted position rather than the most extended front-end | tip part of the part.

  In the aspect of the present invention, the liquid substance sucked into the internal space may be a substance generated in the body such as saliva or blood, or may be a substance supplied into the body from the outside such as a cooling fountain. Good. Further, the solid substance sucked into the internal space may be cutting scraps such as teeth, or may be a substance supplied from the outside such as absorbent cotton.

  In the aspect of the present invention, the cylindrical portion may be formed integrally with the suction pipe connected to the suction force generating means, or may be configured to be detachable from the suction pipe. .

  In the aspect of the present invention, the cylindrical portion may be a cylindrical shape having a curved shape such as a circle or an ellipse, or may be a polygonal cylindrical shape as long as it has a cylindrical shape.

  In the aspect of the present invention, the cylindrical part, the first extending part, the second extending part, and the connecting part may be configured to be integrally formed of the same material, or some of the constituent parts are different. The structure formed by may be sufficient.

  In the aspect of the present invention, the most extended tip part of the second edge part is the edge part closest to the cylindrical part of the first edge part and the most of the first edge part. It may be a plane that includes a line segment that connects the leading end portion that extends, and may be arranged on a specific plane parallel to a predetermined extending direction, or may be a plane that intersects the specific plane. It may be an arrangement configuration located on a plane parallel to a predetermined extending direction.

  In the aspect of the present invention, it is a plane including a line segment that connects an edge portion closest to the cylindrical portion of the first edge portion and a tip portion that extends most of the first edge portion. The shape of the first edge portion projected onto a specific plane parallel to the predetermined extending direction and the shape of the second edge portion projected onto the specific plane are one straight line shape. Alternatively, it may be a curved shape or a shape composed of a plurality of straight lines having different inclination angles. Further, if the second edge portion is inclined along the first edge portion, the inclination angle of the second edge portion needs to be the same as the inclination angle of at least a part of the first edge portion. Absent.

  In the aspect of the present invention, the connecting portion includes a line segment that connects the edge portion closest to the cylindrical portion of the first edge portion and the tip portion that extends most of the first edge portion. It may be an arrangement configuration located on a specific plane parallel to a predetermined extending direction, or a plane intersecting with the specific plane and parallel to the predetermined extending direction An arrangement configuration located above may be used.

  According to a specific aspect of the present invention, the connecting portion includes the first extension portion and the second extension in a direction orthogonal to the predetermined extension direction at the most extended tip portion of the second end edge portion. In the range of the same length as the interval between the two parts, and at least a part of the range defined in the predetermined extending direction from the most extended tip portion of the second edge portion, The mutually opposing surface between a 1st extension part and a 2nd extension part is connected.

  In this specific aspect, the connecting portion has the same length as the interval between the first extending portion and the second extending portion, and the most extended tip portion of the second edge portions. May be configured to be arranged only in at least a specific range of a range determined in a predetermined extending direction, and includes the specific range up to a part of the internal space of the cylindrical portion In a wide range, it may be arranged in a predetermined extending direction in a continuous state or in a discontinuous state.

  In the specific aspect of Claim 3, a connection part is a mutually opposing surface between a 1st extension part and a 2nd extension part in the front-end | tip part which extends most among 2nd edge parts. Are connected.

  According to a specific aspect of the present invention, the connecting portion includes the first extending portion at a position where the interval between the first extending portion and the second extending portion is the largest in the direction orthogonal to the predetermined extending direction. The mutually opposing surfaces between the protruding portion and the second extending portion are connected.

  According to a specific aspect of the present invention, the first end portion of the first extending portion has a first inclined portion including the end portion closest to the cylindrical portion, and an inclination angle from the first inclined portion. A second inclined portion including a small and most extended tip portion, and an end edge portion closest to the tubular portion of the first end edge portions and a most extended portion of the first end edge portions. The inclination angle with respect to a predetermined extending direction of the line segment connecting the leading end portions is set smaller than the inclination angle of the first inclined portion.

  In this specific aspect, the inclination angle of the second edge portion may be the same as or different from the inclination angle of the second inclination portion.

  In this specific aspect, the first edge portion may have three or more inclined portions with different inclination angles, or may include an edge portion parallel to a predetermined extending direction. Good.

  According to a specific aspect of the present invention, the second end edge portion of the second extending portion is an end edge portion connected to the inner peripheral surface of the cylindrical portion or the inner peripheral surface of the first extending portion. A third inclined part including the fourth inclined part having a smaller inclination angle than the third inclined part and including the most extended tip part, and an end closest to the cylindrical part among the first edge parts. The inclination angle with respect to a predetermined extending direction of the line segment connecting the edge portion and the most extending tip portion of the first edge portion is smaller than the inclination angle of the third inclined portion, and the inclination of the fourth inclined portion It is set larger than the angle.

  In this specific aspect, the second edge portion may be configured to have three or more inclined portions having different inclination angles, or may include an edge portion parallel to a predetermined extending direction. Good.

  According to a specific aspect of the present invention, the internal space of the cylindrical portion has a circular cross-sectional shape in a plane orthogonal to the predetermined extending direction, and the cylinder in the plane orthogonal to the predetermined extending direction. The inner space of the cylindrical portion in a region defined by the inner peripheral surface of the cylindrical portion or the inner peripheral surface of the first extending portion and the inner peripheral surface of the second extending portion facing the inner peripheral surface. The second extending portion is arranged so that the center position is located.

  According to a specific aspect of the present invention, in the plane orthogonal to the predetermined extending direction, the inner peripheral surface of the cylindrical portion or the inner peripheral surface of the first extending portion and the first inner surface facing the inner peripheral surface. The area of the region defined by the inner peripheral surface of the two extending portions is an area defined by the outer peripheral surface of the second extending portion and the inner peripheral surface of the first extending portion facing the outer peripheral surface. The second extending portion is disposed so as to be the same as the area.

  In a specific aspect of the present invention, the cylindrical portion has an insertion opening into which the suction pipe connected to the suction force generating means is inserted and communicates with the internal space, and a step portion. It is formed so as to be able to contact the end edge of the suction pipe inserted from the insertion opening.

  According to a specific aspect of the present invention, the cylindrical portion is inserted with a suction pipe connected to the suction force generating means, has an insertion opening communicating with the internal space, and the plurality of gripping protrusions have a predetermined extension. It protrudes from the outer peripheral surface of the cylindrical portion in a direction orthogonal to the outgoing direction.

  In the first aspect of the present invention, the first extending portion has a first edge portion that forms a first suction opening for sucking a substance such as saliva or cutting waste from the body, The suction opening extends in a predetermined extending direction from the tubular portion so as to communicate with the internal space. The second extending portion has a second edge portion that forms a second suction opening in the first suction opening for sucking a substance such as saliva or cutting waste from the body, and the second suction opening is It extends in a predetermined extending direction so as to communicate with the internal space, and is connected to the inner peripheral surface of the cylindrical portion or the inner peripheral surface of the first extending portion. A connection part connects the mutually opposing surface between a 1st extension part and a 2nd extension part in the direction orthogonal to a predetermined extension direction. The first edge portion is in a predetermined extending direction from the edge portion closest to the tubular portion of the first edge portion to the most extended tip portion of the first edge portion. And extend at an angle. The second end edge portion extends while being inclined with respect to a predetermined extending direction along the inclination direction of the first end edge portion. The most extended tip portion of the second edge portion is, in a predetermined extending direction, of the edge portion closest to the tubular portion of the first edge portion and the first edge portion. It is located at a position extending from the line segment connecting the most extended tip portion, and at a position retracted from the most extending tip portion of the first edge portion. As a result, since the most extended tip portion of the second edge portion is disposed at a position retracted from the most extended tip portion of the first edge portion, saliva or cutting waste Etc. can be sucked smoothly. In addition, the most extended tip portion of the second edge portion has an edge portion closest to the tubular portion of the first edge portion and a first edge portion in a predetermined extending direction. Since it is arranged at a position extending beyond the line segment connecting the most extended tip portion of the first, the soft tissue is reduced from being adsorbed by the first suction opening and the second suction opening when sucked can do. Further, since the connecting portion connects the mutually facing surfaces between the first extending portion and the second extending portion, the second extending portion is deformed by the suction force, and the first suction opening or the second extending portion is deformed. Blocking the suction opening can be reduced.

  According to a specific aspect of the present invention, the connecting portion includes the first extension portion and the second extension in a direction orthogonal to the predetermined extension direction at the most extended tip portion of the second end edge portion. In the range of the same length as the interval between the two parts, and at least a part of the range defined in the predetermined extending direction from the most extended tip portion of the second edge portion, The mutually opposing surface between a 1st extension part and a 2nd extension part is connected. As a result, the connecting portion connects the two extending portions from the most extended tip portion of the second end edge portion within at least a part of the range having the same length as the interval between the extending portions. As a result, it is possible to reliably reduce the deformation of the second extending portion due to the suction force to block the first suction opening or the second suction opening.

  In the specific aspect of Claim 3, a connection part is a mutually opposing surface between a 1st extension part and a 2nd extension part in the front-end | tip part which extends most among 2nd edge parts. Are connected. As a result, at the most extended tip portion of the second end edge portion, the connecting portion keeps the distance between the two extending portions constant, so that the opening areas of the first suction opening and the second suction opening are set. It can be surely secured.

  According to a specific aspect of the present invention, the connecting portion includes the first extending portion at a position where the interval between the first extending portion and the second extending portion is the largest in the direction orthogonal to the predetermined extending direction. The mutually opposing surfaces between the protruding portion and the second extending portion are connected. As a result, at the position where the distance between the two extending portions is the largest, the connecting portion keeps the distance between the two extending portions constant, so that the opening area of the first suction opening and the second suction opening can be ensured. Can be secured.

  According to a specific aspect of the present invention, the first edge portion of the first extending portion has a first inclined portion and a second inclined portion having an inclination angle smaller than that of the first inclined portion. An inclination angle with respect to a predetermined extending direction of a line segment connecting an edge part closest to the cylindrical part of the first edge part and a tip part extending most of the first edge part is: It is set smaller than the inclination angle of the first inclined portion. As a result, since the first edge portion has two inclined portions having different inclination angles, it is possible to reduce the blocking of the first suction opening.

  According to a specific aspect of the present invention, the second end portion of the second extending portion has a third inclined portion and a fourth inclined portion having a smaller inclination angle than the third inclined portion. An inclination angle with respect to a predetermined extending direction of a line segment connecting an edge part closest to the cylindrical part of the first edge part and a tip part extending most of the first edge part is: The inclination angle is set smaller than the inclination angle of the third inclination portion and larger than the inclination angle of the third inclination portion. As a result, since the second end edge portion has two inclined portions having different inclination angles, it is possible to reduce the blocking of the second suction opening.

  In the specific aspect of Claim 7, it demarcates with the internal peripheral surface of a cylindrical part, or the internal peripheral surface of a 1st extension part, and the internal peripheral surface of the 2nd extension part which opposes the internal peripheral surface. The center position of the internal space of the cylindrical portion is located in the region to be processed. As a result, the substance sucked from the second suction opening can be smoothly moved to the internal space of the cylindrical portion.

  According to a specific aspect of the present invention, the inner peripheral surface of the cylindrical portion or the inner peripheral surface of the first extending portion and the inner peripheral surface of the second extending portion facing the inner peripheral surface are defined. The area of the region to be formed is the same as the area of the region defined by the outer peripheral surface of the second extending portion and the inner peripheral surface of the first extending portion facing the outer peripheral surface. As a result, the suction force in the region defined by the inner peripheral surface of the cylindrical portion and the inner peripheral surface of the second extension portion, the outer peripheral surface of the second extension portion, and the inner peripheral surface of the first extension portion It can be reduced that the suction force in the region defined by is different.

  According to a specific aspect of the present invention, the cylindrical part has an insertion opening into which a suction pipe connected to the suction force generating means is inserted and communicates with the internal space, and a step part. The step portion is formed so as to be in contact with the end edge of the suction pipe inserted from the insertion opening. As a result, the stepped portion comes into contact with the edge of the suction pipe, so that the attachment position of the medical suction tool with respect to the suction pipe can be restricted to a fixed position.

  In a specific aspect of the present invention, the plurality of gripping protrusions protrude from the outer peripheral surface of the cylindrical portion in a direction orthogonal to the predetermined extending direction. As a result, the user can easily attach and remove the medical suction tool to the suction pipe by gripping the plurality of gripping protrusions.

It is a front view which shows the state by which the suction tool 1 for dental care which concerns on embodiment of this invention was attached to the suction pipe 2. FIG. It is the perspective view which looked at the suction tool 1 for dental treatment from the right front. It is the top view which looked at the suction tool 1 for dental treatment from the upper direction. It is the front view which looked at the suction tool 1 for dental care from the front. It is the right view which looked at the dental medical suction tool 1 from the right side. It is right sectional drawing of the suction tool 1 for dental medical treatment cut | disconnected according to the AA line shown in FIG. 7 is a right sectional view of the dental medical suction tool 1 and the suction pipe 2 cut in the same manner as in FIG. 6 in a state where the dental medical suction tool 1 is attached to the suction pipe 2. FIG. It is a top view which shows the suction tool 1 for dental care of the modification of this invention.

<Embodiment>
Hereinafter, a suction tool for dental practice according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a dental medical suction tool 1 and a dental medical suction device for sucking a patient's saliva and blood, or a liquid material such as a cooling fountain, or a solid material such as cutting waste from the patient's mouth. The suction pipe 2 to which the tool 1 is attached is shown. Note that the two directions indicated by the arrows in FIG. 1 are defined as the vertical direction and the front-rear direction, the direction perpendicular to both directions is defined as the left-right direction, and each direction is also shown in other drawings in FIG.

  The dental medical suction tool 1 is configured to be detachable from a suction pipe 2 connected to a suction pump (not shown). The dental medical suction tool 1 can be used repeatedly by being heat sterilized, but when used for a long time, it is replaced with a new dental medical suction tool 1.

[Detailed configuration of suction tool 1 for dental practice]
With reference to FIG. 2 thru | or FIG. 6, the detailed structure of the dental medical suction tool 1 is demonstrated. The dental medical suction tool 1 is molded from a synthetic resin material. The synthetic resin material needs to be a synthetic resin material having excellent heat resistance, chemical resistance, and flexibility. As heat resistance, it is necessary to be able to withstand sterilization in a heating range from 130 ° C. to 150 ° C. As chemical resistance, it is necessary not to be deteriorated by chemicals used in dental treatment. . As the synthetic resin material, a synthetic resin material such as silicon rubber or a thermoplastic elastomer can be used. In this embodiment, Lavalon (registered trademark) MJ5301C manufactured by Mitsubishi Chemical Corporation is used.

  FIG. 2 is a perspective view of the dental medical suction tool 1 alone. In FIG. 2, the dental medical suction tool 1 mainly includes a cylindrical portion 3, a first extending portion 4, a second extending portion 5, and a connecting portion 6. The cylindrical portion 3 has a cylindrical shape and is formed to extend in the front-rear direction. The first extending portion 4 is formed to extend forward from the front portion of the tubular portion 3. The outer peripheral surface of the first extension portion 4 is formed continuously with the outer peripheral surface of the tubular portion 3. The second extension part 5 is formed to extend forward from the front part of the cylindrical part 3 and the first extension part 4 in a state of being arranged inside the first extension part 4. The 1st extension part 4 is provided with the 1st edge part 10, and the 1st front-end | tip part 12 is a part extended most forward among the 1st edge parts 10. FIG. The second extending portion 5 includes a second end edge portion 14. The second tip portion 16 is a portion extending forward most in the second end edge portion 14. In the present embodiment, the first tip portion 12 extends forward by 2.5 mm from the second tip portion 16. The first tip portion 12 is formed on an arc surface having a radius of 0.5 mm. The second tip portion 16 is formed on a circular arc surface having a radius of 0.2 mm.

  FIG. 3 is a top view of the dental medical suction tool 1, and FIG. 4 is a front view of the dental medical suction tool 1. In FIG. 3, the cylindrical part 3 has a circular outer peripheral surface centering on the center point CT. As shown in FIGS. 3 and 4, the tip end portions 12 and 16 of the two extending portions 4 and 5 are planes extending in the vertical direction through the center point CT, and on a specific plane extending in the front-rear direction. It arrange | positions so that it may each be located in. As shown in FIG. 4, the connecting portion 6 connects the first extending portion 4 and the second extending portion 5 in a state of being located on a specific plane. Specifically, as shown in FIG. 2, the connecting portion 6 has a connecting tip portion 18 in the vicinity of the arrangement position of the second tip portion 16, and extends rearward from the connecting tip portion 18.

  In FIG. 2, the first edge portion 10 of the first extension portion 4 includes a rear end portion 20 closest to the cylindrical portion 3, an upper right inclined portion 22, an upper left inclined portion 24, and a lower right inclined portion 26. And a lower left inclined portion 28. The upper right inclined portion 22 is formed to be connected to the rear end portion 20 in the upper portion, and is connected to the lower right inclined portion 26 in the lower portion. The upper left inclined portion 24 is formed to be connected to the rear end portion 20 in the upper portion, and is connected to the lower left inclined portion 28 in the lower portion. The lower right inclined portion 26 and the lower left inclined portion 28 are formed to be connected to the first tip portion 12 in the lower portion.

  In FIG. 2, the second end edge portion 14 of the second extending portion 5 includes an upper right inclined portion 32, an upper left inclined portion 34, a lower right inclined portion 36, a lower left inclined portion 38, a right horizontal portion 40, A left horizontal portion 42. The right horizontal portion 40 and the left horizontal portion 42 are formed to extend horizontally in the front-rear direction. The upper right inclined portion 32 is formed to be connected to the upper right inclined portion 22 in the right side portion, and is connected to the rear end portion of the right horizontal portion 40 in the lower portion. The upper left inclined portion 34 is formed to be connected to the upper left inclined portion 24 in the left side portion, and is connected to the rear end portion of the left horizontal portion 42 in the lower portion. The lower right inclined portion 36 is formed to be connected to the front end portion of the right horizontal portion 40 in the upper portion and is connected to the second tip portion 16 in the lower portion. The lower left inclined portion 38 is formed by being connected to the front end portion of the left horizontal portion 42 in the upper portion, and is connected to the second tip portion 16 in the lower portion.

  The first edge portion 10 of the first extension portion 4 forms a first suction opening 44. The second end edge portion 14 of the second extending portion 5, the upper right inclined portion 22 of the first extending portion 4, and a part of the upper left inclined portion 24 form a second suction opening 46. As shown in FIGS. 3 and 4, the second suction opening 46 is formed inside the first suction opening 44. As shown in FIG. 4, the second suction opening 46 is formed so that the center point CT of the cylindrical portion 3 is located inside the second suction opening 46.

  In the present embodiment, the area where the second suction opening 46 is projected on the plane orthogonal to the front-rear direction is the plane where the remaining suction openings excluding the second suction opening 46 from the first suction opening 44 are orthogonal to the front-rear direction. It is set to approximately the same area as the projected area. The remaining suction opening is defined by a lower right inclined portion 26, a lower left inclined portion 28, a lower right inclined portion 36, and a lower left inclined portion 38.

  As shown in FIG. 4, the first edge portion 10 of the first extension portion 4 has a circular outer peripheral surface centered on the center point CT. The circular outer peripheral surface of the first edge portion 10 is formed with the same radius as the circular outer peripheral surface of the cylindrical portion 3. The lower right inclined portion 36 and the lower left inclined portion 38 of the second end edge portion 14 of the second extending portion 5 are formed in an arc shape centering on a center point CH eccentrically upward from the center point CT. The shape of the second upper edge portion 14 as viewed from the upper right inclined portion 32 and the upper left inclined portion 34 from the front is a shape that rises linearly from the right horizontal portion 40 and the left horizontal portion 42 as shown in FIG. .

(Inclined shape of the 1st edge part 10 of the 1st extension part 4)
An inclined shape of the first end edge portion 10 of the first extension portion 4 will be described with reference to FIGS. 5 and 6. FIG. 5 is a right side view of the dental medical suction tool 1, and FIG. 6 is a right sectional view of the dental medical suction tool 1 cut along the line AA shown in FIG. In FIG. 5, the center line CL is a line that passes through the center point CT and extends in the front-rear direction. The inclined line KL1 is a line connecting the rear end portion 20 and the first tip portion 12. The inclined line KL2 is a line connecting the rear end portion 20 and the second tip portion 16. The inclination angle θ1 is an angle formed by the inclination line KL1 and the horizontal line in the front-rear direction in the clockwise direction. The inclination angle θ2 is an angle formed by the inclination line KL2 and the horizontal line in the front-rear direction in the clockwise direction. The inclination angle α1 is an angle formed by the upper right inclined portion 22 in the clockwise direction between the inclined line projected on the vertical plane including the center line CL and the horizontal line in the front-rear direction. The inclination angle α2 is an angle formed by the lower right inclined portion 26 in the clockwise direction between the inclined line projected on the vertical plane including the center line CL and the horizontal line in the front-rear direction.

  In FIG. 6, the inclination angle α1 is an angle formed by the upper left inclined portion 24 in the clockwise direction between the inclined line projected on the vertical plane including the center line CL and the horizontal line in the front-rear direction. The inclination angle α2 is an angle formed by the lower left inclined portion 28 in the clockwise direction between the inclined line projected on the vertical plane including the center line CL and the horizontal line in the front-rear direction. In the present embodiment, the inclination angle θ1 is set to 41 degrees, and the inclination angle θ2 is set to 37 degrees. The inclination angle α1 is set to 67 degrees, and the inclination angle α2 is set to 27 degrees. That is, the inclination angle α1 is set larger than the inclination angle θ1, and the inclination angle α2 is set smaller than the inclination angle θ1. By setting these inclination angles, the inclined portion formed by the upper right inclined portion 22 and the lower right inclined portion 26 can form a predetermined gap between the horizontal plane including the inclined line KL1. it can. Similarly, the inclined portion formed by the upper left inclined portion 24 and the lower left inclined portion 28 can form a predetermined gap between the horizontal plane including the inclined line KL1.

  The right connecting portion where the upper right inclined portion 22 and the lower right inclined portion 26 are connected is located at substantially the same position as the center line CL in the vertical direction, as shown in FIG. Similarly, the left connecting portion to which the upper left inclined portion 24 and the lower left inclined portion 28 are connected is located at substantially the same position as the center line CL in the vertical direction. In FIG. 4, the right connection portion and the left connection portion are substantially located on the horizontal line in the left-right direction passing through the center point CT.

(Inclined shape of the 2nd edge part 14 of the 2nd extension part 5)
The inclined shape of the second end edge portion 14 of the second extending portion 5 will be described with reference to FIGS. 5 and 6. In FIG. 5, the inclination angle β1 is an angle formed by the upper right inclined portion 32 in the clockwise direction between the inclined line projected on the vertical vertical plane including the center line CL and the horizontal line in the front-rear direction. The inclination angle β2 is an angle formed by the lower right inclined portion 36 in the clockwise direction between the inclined line projected on the vertical plane including the center line CL and the horizontal line in the front-rear direction.

  In FIG. 6, the inclination angle β1 is an angle formed by the upper left inclined portion 34 in the clockwise direction between the inclined line projected on the vertical vertical plane including the center line CL and the horizontal line in the front-rear direction. The inclination angle β2 is an angle that the lower left inclined portion 38 forms in the clockwise direction between the inclined line projected on the vertical vertical plane including the center line CL and the horizontal line in the front-rear direction. In the present embodiment, the inclination angle β1 is set to 67 degrees, and is set to the same angle as the inclination angle α1. The inclination angle β2 is set to 29 degrees. That is, the inclination angle θ2 is set smaller than the inclination angle θ1. The inclination angle β1 is set larger than the inclination angle θ2, and the inclination angle β2 is set smaller than the inclination angle θ2. By setting these inclination angles, the inclination part formed by the upper right inclination part 32, the right horizontal part 40, and the lower right inclination part 36 is predetermined between the horizontal plane including the inclination line KL2. A gap can be formed. Similarly, the inclined portion formed by the upper left inclined portion 34, the left horizontal portion 42, and the lower left inclined portion 38 may form a predetermined gap between the horizontal plane including the inclined line KL2. it can.

(Extension shape of the 2nd tip part 16 of the 2nd extension part 5)
In FIG. 5, the 2nd front-end | tip part 16 of the 2nd extension part 5 is arrange | positioned in the position extended ahead with respect to inclination line KL1. Further, the second tip portion 16 is disposed at a position retracted from the first tip portion 12, that is, a rear position. Lower right so that the distance between the second tip portion 16 and the center line CL is substantially the same as the distance between each horizontal portion of the right horizontal portion 40 and the left horizontal portion 42 and the center line CL. The inclined portion 36 and the lower left inclined portion 38 are arranged with respect to the center line CL.

  In the present embodiment, the inclination angle α2 is set to 27 degrees, and the inclination angle β2 is set to 29 degrees that is smaller than 37 degrees of the inclination angle θ2. The inclination angle α2 and the inclination angle β2 are set to substantially the same angle. In the setting state of these inclination angles, the right horizontal portion 40 of the right horizontal portion 40 is extended so that an inclination portion of 1/2 or more of the lower right inclination portion 36 extends forward with respect to the inclination line KL1, as shown in FIG. The length in the front-rear direction is set. Similarly, the length in the front-rear direction of the left horizontal portion 42 is set so that an inclined portion of ½ or more of the lower left inclined portion 38 extends forward with respect to the inclined line KL1.

  In this embodiment, the diameter of the outer peripheral surface of the cylindrical part 3 is set to 12.1 mm. The first tip portion 12 extends forward from the rear end portion 20 by 13.0 mm. The second tip portion 16 extends forward from the rear end portion 20 by 10.5 mm. A slope line in which the lower right slope portion 26 is projected onto a vertical vertical plane including the center line CL, and a slope line in which the lower right slope portion 36 is projected onto a vertical vertical plane including the center line CL. Is set to about 2.2 mm. Similarly, the lower left inclined portion 28 is projected onto the vertical vertical plane including the center line CL, and the lower left inclined portion 38 is projected onto the vertical vertical plane including the center line CL. The spacing between the lines is also set to about 2.2 mm.

(Internal structure of the cylindrical part 3)
In FIG. 6, the tubular portion 3 includes a rear inner peripheral portion 50, an intermediate inner peripheral portion 52, and a front inner peripheral portion 54. The three inner peripheral portions 50 to 54 each have a circular cross-sectional shape on a plane orthogonal to the center line CL. An insertion opening 56 is formed in the rear end portion of the rear inner peripheral portion 50. The suction pipe 2 is inserted into the cylindrical portion 3 from the insertion opening 56. The intermediate inner peripheral portion 52 is connected to the front portion of the rear inner peripheral portion 50 at the rear portion. The insertion opening 56 has a diameter D1, and the intermediate inner peripheral portion 52 is formed by an inner peripheral surface having a diameter D2 smaller than the diameter D1. For this reason, the rear inner peripheral portion 50 is formed by a tapered inner peripheral surface from the insertion opening 56 to the connecting portion with the intermediate inner peripheral portion 52, with a circular cross-sectional diameter gradually decreasing. The diameter of the outer peripheral surface of the suction pipe 2 is set smaller than the diameter D1 of the insertion opening 56. Further, the diameter of the outer peripheral surface of the suction pipe 2 is slightly larger than the diameter D2 of the inner peripheral surface of the intermediate inner peripheral portion 52. By setting the diameter D2 of the inner peripheral surface of the intermediate inner peripheral portion 52, when the suction pipe 2 is inserted, the intermediate inner peripheral portion 52 is elastically deformed to maintain the insertion state of the suction pipe 2.

  The intermediate inner peripheral portion 52 is formed by an inner peripheral surface having a circular cross-sectional shape having a diameter D2. The front inner peripheral portion 50 is formed by an inner peripheral surface having a circular cross-sectional shape having a diameter D3. The diameter D3 is set smaller than the diameter D2. By setting the diameter, the stepped portion 58 is formed at a position where the intermediate inner peripheral portion 52 and the front inner peripheral portion 54 are connected. The inner peripheral surfaces of the three inner peripheral portions 50 to 54 form a suction internal space in which a substance such as saliva or cutting waste is sucked. The first suction opening 44 and the second suction opening 46 communicate with the suction internal space.

  In FIG. 6, the second extending portion 5 is formed to extend rearward from the second end edge portion 14 to the fixed end portion 60. A rear portion of the second extending portion 5 including the fixed end portion 60 is connected to the inner peripheral surface of the front inner peripheral portion 54.

(Formation range of connecting portion 6)
In FIG. 6, the connecting portion 6 is formed to extend rearward from the connecting tip portion 18 to the connecting rear end portion 60. The rear portion of the connecting portion 6 including the connecting rear end portion 60 is connected to the inner peripheral surface of the front inner peripheral portion 54. The connected rear end portion 60 is disposed at the same position as the fixed end portion 60 of the second extension portion 5 in the front-rear direction.

  In FIG. 6, a region RE is a formation region from the second tip portion 16 of the second extending portion 5 to the fixed end portion 60 in the front-rear direction. The region RC is a region in the front-rear direction where the connecting tip portion 18 of the connecting portion 6 is disposed. The interval H is the interval between the mutually facing surfaces between the first extension portion 4 and the second extension portion 5 in the second tip portion 16 of the second extension portion 5. Specifically, in the radial direction from the center point CT shown in FIG. 4, the outer peripheral surfaces of the lower right inclined portion 36 and the lower left inclined portion 38, and the inner peripheral surfaces of the lower right inclined portion 26 and the lower left inclined portion 28 The largest interval among the intervals is between the intervals H. The region RC is a region having the same length as the interval H.

  In the present embodiment, the connecting tip portion 18 is disposed within the region RC. Even if a part of the second extending portion 5 adjacent to the connecting tip portion 18 is pressed from above and curved downward due to the arrangement of the connecting tip portion 18, the outer periphery of the lower right inclined portion 36 and the lower left inclined portion 38. The suction opening formed between the surface and the inner peripheral surfaces of the lower right inclined portion 26 and the lower left inclined portion 28 can be prevented from being blocked.

(Thickness of each part of the suction tool 1 for dental practice)
In FIG. 6, the thickness T1 of the lower right inclined portion 26 of the first extending portion 4 and the thickness T1 of the lower left inclined portion 28 are the thickness T2 of the lower right inclined portion 36 of the second extending portion 5, and The thickness is set to be substantially the same as the thickness T2 of the lower left inclined portion 38 or slightly smaller. Further, the thickness T3 of the cylindrical portion 3 in the front inner peripheral portion 54 is set to the same thickness as the thickness T1. In the present embodiment, the wall thicknesses T1 and T3 are set to 1.5 mm.

[Operation and Action of Embodiment]
The operation and action of the dental practice suction tool 1 will be briefly described. The operations and actions of the dental medical suction tool 1 include an operation of attaching and removing the dental medical suction tool 1 to and from the suction pipe 2 and an operation of sucking a substance such as saliva by the dental medical suction tool 1 as follows. Explained.

(Attachment operation and removal operation of the suction device 1 for dental care with respect to the suction pipe 2)
When the new dental medical suction tool 1 is attached to the suction pipe 2, the user inserts the distal end portion of the suction pipe 2 into the inside through the insertion opening 56 of the dental medical suction tool 1 in FIG. 6. Since the diameter of the suction pipe 2 is smaller than the diameter D <b> 1 of the insertion opening 56, the user can insert the distal end portion of the suction pipe 2 in the rear inner peripheral portion 50 with a small insertion force.

  Since the diameter of the outer peripheral surface of the suction pipe 2 is slightly larger than the diameter D2 of the inner peripheral surface of the intermediate inner peripheral portion 52, the user can use the insertion force in the rear inner peripheral portion 50 in the intermediate inner peripheral portion 52. It is necessary to insert the tip portion of the suction pipe 2 with a large insertion force. During the insertion, the intermediate inner peripheral portion 52 of the cylindrical portion 3 is elastically deformed, so that the diameter of the inner peripheral surface of the intermediate inner peripheral portion 52 is increased in accordance with the diameter of the outer peripheral surface of the suction pipe 2.

  When the user inserts the suction pipe 2 until the tip portion of the suction pipe 2 contacts the stepped portion 58, the position of the dental suction tip 1 in the front-rear direction with respect to the suction pipe 2 is determined. By the contact with the stepped portion 58, the insertion operation of the suction pipe 2 is completed, and the dental medical suction tool 1 is attached to the suction pipe 2.

  When the dental medical suction tool 1 is removed from the suction pipe 2 in order to replace it with a new dental medical suction tool 1, the user can connect the outer peripheral surface of the suction pipe 2 and the inner peripheral surface of the intermediate inner peripheral portion 52. The work for pulling out the old dental medical suction tool 1 from the suction pipe 2 is performed against the frictional resistance.

(Operation for sucking saliva and other substances with the dental care suction tool 1)
Before using the dental medical suction tool 1 for treating a patient, the dental medical suction tool 1 alone or the dental medical suction tool 1 attached to the suction pipe 2 having a predetermined length is heat sterilized. It is processed. When a suction pump (not shown) is operated, the inside of the suction pipe 2 and the suction inner space of the cylindrical portion 3 are in a negative pressure state. When the dental medical suction tool 1 is inserted into the oral cavity of the patient in this negative pressure state, liquid materials such as saliva and a cooling fountain, or solid materials such as cutting dust are transferred to the second extending portion 5. The second suction opening 46 and the first suction opening 44 of the first extending portion 4 other than the second suction opening 46 are sucked into the suction inner space of the cylindrical portion 3. In general, in order to suck saliva or the like that accumulates in the lower part of the oral cavity, as shown in FIGS. 1 and 7, the first tip portion 12 of the first extension portion 4 is located in the lower part of the oral cavity. Thus, the dental practice suction tool 1 is inserted. In FIGS. 1 and 7, soft tissue TG such as a tongue or a cheek is indicated by a two-dot chain line.

  When the dental medical suction tool 1 is inserted all the way into the oral cavity, the first extension part 4 and the second extension part 5 of the dental medical suction tool 1 often come into contact with the soft tissue TG of the patient. Occur. In this case, the surface of the soft tissue TG is sucked toward the first suction opening 44 and the second suction opening 46. However, as shown in FIGS. 5 and 6, the second distal end portion 16 of the second extending portion 5 extends forward from the inclined line KL1, so that the surface of the soft tissue TG is the second distal end. The portion 16 is reduced from being sucked up to the first edge portion 10 and the second edge portion 14. Specifically, when the surface of the soft tissue TG hits the second tip portion 16, the surface of the soft tissue TG becomes the upper right inclined portion 22, the upper left inclined portion 24, the lower right inclined portion 26 of the first edge portion 10, And contact with the lower left inclined portion 28 and contact with the upper right inclined portion 32, the upper left inclined portion 34, the lower right inclined portion 36, and the lower left inclined portion 38 of the second edge portion 14 are reduced. The

  Since the vicinity of the second tip portion 16 of the second extension portion 5 is connected to the vicinity of the first tip portion 12 of the first extension portion 4 by the connecting portion 6, the second extension portion 5. Even when the second distal end portion 16 hits the surface of the soft tissue TG, the vicinity of the second distal end portion 16 of the second extending portion 5 is reduced from being elastically deformed and moving downward. By reducing the downward movement, the state in which the second tip portion 16 extends forward from the inclined line KL1 is maintained. Further, since the second extending portion 5 is formed of a synthetic resin material excellent in flexibility, the portion of the lower right inclined portion 36 and the lower left inclined portion 38 that is away from the second tip portion 16 is The second extending part 5 rarely gives the patient a sense of incongruity because it is elastically deformed in contact with the soft tissue TG.

  The inclination angle β1 of the upper right inclined portion 32 and the upper left inclined portion 34 of the second extending portion 14 is set larger than the inclination angle β2 of the lower right inclined portion 36 and the lower left inclined portion 38. The second extending portion 14 includes a right horizontal portion 40 and a left horizontal portion 42. As shown in FIGS. 5 and 6, both inclined portions 32 and 34 and both horizontal portions 40 and 42 of the second extending portion 5 act to secure a gap behind the inclined line KL2.

[Effect of the embodiment]
In the present embodiment, as shown in FIGS. 5 and 6, the second distal end portion 16 of the second extending portion 5 is arranged to extend forward from the inclined line KL1, so that the surface of the soft tissue TG is It is reduced that the first end edge portion 10 and the second end edge portion 14 are attracted to the second tip end portion 16. As a result, it is reduced that the first suction opening 44 and the second suction opening 46 are blocked by the surface of the soft tissue TG, and the suction action of the substance from both the suction openings 44 and 46 is continued.

  In the present embodiment, the vicinity of the second tip portion 16 of the second extension portion 5 is connected to the vicinity of the first tip portion 12 of the first extension portion 4 by the connecting portion 6. 2 Even when the second tip portion 16 of the extending portion 5 hits the surface of the soft tissue TG, the portion near the second tip portion 16 of the second extending portion 5 is elastically deformed and reduced downward. Is done. As a result, it is reduced that the first suction opening 44 and the second suction opening 46 are blocked by the surface of the soft tissue TG, and the suction action of the substance from both the suction openings 44 and 46 is reliably continued.

  In the present embodiment, the region RC is set to the same distance as the distance H between the extending portions 4 and 5 shown in FIG. As shown in FIG. 6, the connecting tip portion 18 of the connecting portion 6 is disposed within the region RC from the second tip portion 16. As a result, even if the second tip portion 16 hits the soft tissue TG and is bent downward and elastically deformed, the first suction opening 44 positioned below the second tip portion 16 is blocked by the vicinity of the second tip portion 16. The peeling is surely prevented.

  In the present embodiment, as shown in FIGS. 5 and 6, the inclined portions 32 and 34 and the horizontal portions 40 and 42 of the second extending portion 5 ensure a gap behind the inclined line KL2. To work for. As a result, the second suction opening 46 is reduced from being blocked by the surface of the soft tissue TG, and the suction action of the substance from the suction opening 46 is reliably continued.

  In the present embodiment, since the second extending portion 5 includes both horizontal portions 40 and 42, in order to arrange the second tip portion 16 so as to extend forward from the inclined line KL1, the lower right inclined portion 26 is provided. It is not necessary to set the inclination angle of the lower left inclined portion 28 to a small angle. As a result, the inclination angle β2 of the both inclined portions 36 and 38 can be set to substantially the same angle as the inclination angle α2 of both the inclined portions 26 and 28 of the first extending portion 4, and the second tip portion 16 is soft tissue. Even when the TG is touched, the feeling of discomfort to the patient is reduced.

  In the present embodiment, as shown in FIG. 4, the second suction opening 46 is disposed above the first suction opening 44 other than the second suction opening 46. The connecting portion 6 is disposed inside the first suction opening 44 other than the second suction opening 46. In general, since the liquid substance such as saliva is accumulated in the lower part of the oral cavity of the patient, the connecting portion 6 does not hinder the suction of the liquid substance. On the other hand, solid substances such as tooth cutting scraps often fall on both inclined portions 36 and 38 of the second extending portion 5 located above both inclined portions 26 and 28 of the first extending portion 4. Therefore, this solid substance is sucked from the second suction opening 46 and smoothly moved to the suction internal space of the cylindrical portion 3.

<Correspondence of configuration>
The dental medical suction tool 1 is an example of the medical suction tool of the present invention. The suction pipe 2 is an example of the suction pipe of the present invention. The cylindrical part 3, the 1st extension part 4, the 2nd extension part 5, and the connection part 6 are examples of the cylindrical part of this invention, a 1st extension part, a 2nd extension part, and a connection part. is there. The first edge portion 10 and the second edge portion 12 are examples of the first edge portion and the second edge portion of the present invention. The first suction opening 44 and the second suction opening 46 are examples of the first suction opening and the second suction opening of the present invention. The space formed by the inner peripheral surfaces of the rear inner peripheral portion 50, the intermediate inner peripheral portion 52, and the front inner peripheral portion 54 is an example of the inner space of the cylindrical portion of the present invention. The inner peripheral surface of the front inner peripheral portion 54 is an example of the inner peripheral surface of the cylindrical portion of the present invention. The first tip portion 12 is an example of the most extending tip portion of the first edge portion of the present invention. The 2nd front-end | tip part 16 is an example of the most extended front-end | tip part of the 2nd edge part of this invention. The rear end portion 20 is an example of an end edge portion closest to the tubular portion of the first end edge portions of the present invention. The inclined line KL1 is the “line segment connecting the edge portion closest to the cylindrical portion of the first edge portion and the most extending tip portion of the first edge portion” of the present invention. It is an example. The upper right inclined portion 22 and the upper left inclined portion 24 of the first edge portion 10 are examples of the first inclined portion of the present invention, and the lower right inclined portion 26 and the lower left inclined portion 28 of the first edge portion 10 are provided. It is an example of the 2nd inclination part of this invention. The inclination angle α1 is an example of the first inclined portion of the present invention. The inclination angle θ1 is a predetermined line segment connecting the edge portion closest to the cylindrical portion of the first edge portion and the most extended tip portion of the first edge portion. It is an example of "the inclination angle with respect to the extending direction". The upper right inclined portion 32 and the upper left inclined portion 34 of the second edge portion 14 are examples of the third inclined portion of the present invention, and the lower right inclined portion 36 and the lower left inclined portion 38 of the second edge portion 14 are provided. It is an example of the 4th inclination part of this invention. The inclination angle β1 and the inclination angle β2 are examples of the inclination angle of the third inclination portion and the inclination angle of the fourth inclination portion of the present invention. The insertion opening 56 and the step portion 58 are examples of the insertion opening and the step portion of the present invention. The interval H is the “interval at which the first extension portion and the second extension portion are spaced apart from each other in the direction orthogonal to the predetermined extension direction at the most extended tip portion of the second end edge portion” of the present invention. It is an example. The region RC is an example of the “range defined in a predetermined extending direction from the most extended tip portion of the second end edge portion” in the present invention. The center point CT is an example of the center position of the internal space of the cylindrical portion of the present invention. The front-rear direction is an example of the predetermined longitudinal direction and the predetermined extending direction of the present invention.

<Modification>
The present invention is not limited to this embodiment, and various modifications can be made without departing from the spirit of the present invention. An example of the modification will be described below.

(1) Although the present embodiment is a form in which the present invention is embodied in the dental medical suction tool 1, it is not limited to this form. For example, the present invention may be embodied as a surgical suction tool that sucks a substance such as blood in order to perform medical surgery such as cardiac surgery. In this case, depending on the site of the patient to be operated on, the diameter of the cylindrical part, the extension lengths of the first extension part and the second extension part, and the inclinations of the first extension part and the second extension part The shape is determined. In addition, the type of the synthetic resin material that forms the cylindrical part and the two extending parts is also determined according to the tissue characteristics such as the tissue softness of the patient's site to be operated on and the medicine used. The

(2) In the present embodiment, the suction pipe for dental treatment with respect to the suction pipe 2 is fitted by fitting the outer peripheral face of the suction pipe 2 in close contact with the inner peripheral face of the intermediate inner peripheral portion 52 of the cylindrical portion 3. 1 is maintained. When the holding force for holding the attachment state, that is, the frictional resistance between the outer peripheral surface of the suction pipe 2 and the inner peripheral surface of the intermediate inner peripheral portion 52 is large, the dental medical suction tool 1 is removed from the suction pipe 2. On the contrary, there is a case where it is difficult to remove the dental medical suction tool 1 from the suction pipe 2 in order to replace the dental medical suction tool. Therefore, in the modified example shown in FIG. 8, the pair of gripping protrusions 70 and 72 are fixed to the outer peripheral surface of the cylindrical portion 3. The length in the front-rear direction of both gripping projections 70, 72 is that the user can securely grip the outer peripheral surface of the cylindrical portion 3 and move the dental care suction tool 1 in the front-rear direction with respect to the suction pipe 2. Set to the required length. In this modification, two gripping projections 70 and 72 are provided, but three or more gripping projections may be provided. Moreover, although both the gripping protrusions 70 and 72 are provided in a state extending in the front-rear direction, a plurality of gripping protrusions may be provided in a state of extending in the circumferential direction of the outer peripheral surface of the tubular portion 3. Since the user can surely grip the outer peripheral surface of the cylindrical portion 3 by the plurality of gripping protrusions, the dental medical suction tool 1 attached to the suction pipe 2 is rotated with respect to the suction pipe 2. It becomes easy. For this reason, the rotation position of the dental medical suction tool 1 relative to the suction pipe 2 can be adjusted during medical treatment.

(3) In the present embodiment, the inclination angle α1 of the upper right inclined portion 22 and the upper left inclined portion 24 of the first edge portion 10, and the inclination of the upper right inclined portion 32 and the upper left inclined portion 34 of the second edge portion 14. Although the angle β1 is set to the same inclination angle, both inclination angles α1 and β1 may be different angles.

(4) In the present embodiment, the second end edge portion 14 includes the right horizontal portion 40 and the left horizontal portion 42, and the first end edge portion 10 is configured without the horizontal portion. Limited. For example, both end edge portions may be provided with a horizontal portion, or only the first end edge portion may be provided with a horizontal portion.

(5) In this embodiment, the inner peripheral surface of the lower right inclined portion 26 of the first edge portion 10, the inner peripheral surface of the lower left inclined portion 28, and the outer periphery of the lower right inclined portion 36 of the second end edge portion 14. As shown in FIG. 4, the connecting portion 6 is disposed only at the position where the distance between the surface and the outer peripheral surface of the lower left inclined portion 88 is the largest, but the present invention is not limited to this structure. For example, a plurality of connecting portions are provided between the inner peripheral surface of the first end edge portion 10 and the outer peripheral surface of the second end edge portion 14 at a plurality of different rotational positions around the center point CT. It may be a configuration.

(6) In the present embodiment, the lower right inclined portion 36 and the lower left inclined portion 38 of the second end edge portion 14 of the second extending portion 5 are centered on the center point CH eccentrically upward from the center point CT. It is formed in an arc shape. The shape of the second upper edge portion 14 as viewed from the upper right inclined portion 32 and the upper left inclined portion 34 from the front is a shape that rises linearly from the right horizontal portion 40 and the left horizontal portion 42 as shown in FIG. . The shape of the second end edge portion 14 viewed from the front is not limited to the shape shown in FIG. For example, the shape of the second end edge portion 14 viewed from the front may be a continuous arc shape centered on the center point eccentric from the center point CT or a circular shape.

(7) In the present embodiment, in FIG. 4, the upper right inclined portion 32 is formed to be connected to the upper right inclined portion 22 in the right side portion. The upper left inclined portion 34 is formed to be connected to the upper left inclined portion 24 in the left side portion. In FIG. 6, the second extending portion 5 is formed to extend rearward from the second end edge portion 14 to the fixed end portion 60. A rear portion of the second extending portion 5 including the fixed end portion 60 is connected to the inner peripheral surface of the front inner peripheral portion 54. That is, although the 2nd extension part 5 is the structure respectively connected with the internal peripheral surface of the cylindrical part 3, and the internal peripheral surface of the 1st extension part 4, it is not limited to this structure. For example, the second extension portion 5 may be configured to be connected to any one of the inner peripheral surface of the tubular portion 3 and the inner peripheral surface of the first extension portion 4.

(8) In the present embodiment, the inclination angle β1 is set to 67 degrees, and is set to the same angle as the inclination angle α1. The inclination angle α2 is set to 27 degrees, and the inclination angle β2 is set to 29 degrees, which is an angle smaller than 37 degrees of the inclination angle θ2. The inclination angle α2 and the inclination angle β2 are set to substantially the same angle. The setting of these inclination angles α1, α2, β1, and β2 is not limited to the setting of the inclination angles in the present embodiment. For example, as long as the second edge portion 14 is configured to extend in a forward and downward inclination along the forward downward inclination direction of the first edge portion 10, the inclination angles α1 and β1 are different and the inclination angle α2 is different. , Β2 may be set differently.

DESCRIPTION OF SYMBOLS 1 Dental care suction tool 2 Suction pipe 3 Cylindrical part 4 1st extension part 5 2nd extension part 6 Connection part 10 1st edge part 12 1st front-end | tip part 14 2nd end-edge part 16 2nd front-end | tip part 20 Rear end portions 22, 32 Upper right inclined portions 24, 34 Upper left inclined portions 26, 36 Lower right inclined portions 28, 38 Lower left inclined portions 44 First suction opening 46 Second suction opening 50 Rear inner peripheral portion 52 Intermediate inner peripheral portion 54 Front inner peripheral portion 56 Insertion opening 58 Stepped portion KL1, KL2 Inclination lines θ1, θ2, α1, α2, β1, β2 Inclination angle H interval RC region

Claims (10)

A cylindrical portion having an internal space and extending in a predetermined longitudinal direction;
It has a first edge portion that forms a first suction opening for sucking a substance such as saliva or cutting waste from the body, and has a predetermined length from the cylindrical portion so that the first suction opening communicates with the internal space. A first extension portion extending in a predetermined extension direction parallel to the direction;
A second suction opening for forming a second suction opening for sucking a substance such as saliva or cutting waste from the body is formed inside the first suction opening so that the second suction opening communicates with the internal space. A second extending portion extending in a predetermined extending direction and connected to the inner peripheral surface of the cylindrical portion or the inner peripheral surface of the first extending portion;
In a direction orthogonal to the predetermined extending direction, a connecting portion that connects the mutually facing surfaces between the first extending portion and the second extending portion, and
The first edge portion is in a predetermined extending direction from the edge portion closest to the tubular portion of the first edge portion to the most extended tip portion of the first edge portion. And extend
The second edge portion extends with an inclination with respect to a predetermined extending direction along the inclination direction of the first edge portion,
The most extended tip portion of the second edge portion is, in a predetermined extending direction, of the edge portion closest to the tubular portion of the first edge portion and the first edge portion. The medical suction is located at a position extending from a line segment connecting the most extended tip portion of the first end edge portion and at a position retracted from the most extending tip portion of the first edge portion. Ingredients.   The connecting portion has the same length as the interval between the first extending portion and the second extending portion in the direction orthogonal to the predetermined extending direction at the most extending tip portion of the second end edge portion. A first extension portion and a second extension portion in a range, at least a part of a range defined in a predetermined extension direction from a most extended tip portion of the second end edge portions. The medical suction tool according to claim 1, wherein surfaces facing each other are connected to each other.   3. The medical treatment according to claim 2, wherein the connecting portion connects the mutually opposing surfaces between the first extending portion and the second extending portion at the most extended tip portion of the second end edge portion. Suction tool.   The connecting portion is at a position where the distance between the first extending portion and the second extending portion is the largest in the direction orthogonal to the predetermined extending direction, and between the first extending portion and the second extending portion. The medical suction tool according to any one of claims 1 to 3, wherein surfaces facing each other are connected. The first end portion of the first extending portion includes a first inclined portion including an end edge portion closest to the cylindrical portion, and a first inclined portion having an inclination angle smaller than the first inclined portion and including the most extended tip portion. Two inclined portions,
An inclination angle with respect to a predetermined extending direction of a line segment connecting an edge part closest to the cylindrical part of the first edge part and a tip part extending most of the first edge part is: The medical suction tool according to any one of claims 1 to 4, wherein the medical suction tool is set to be smaller than an inclination angle of the first inclined portion. The second end portion of the second extending portion includes a third inclined portion including an inner peripheral surface of the cylindrical portion or an end portion connected to the inner peripheral surface of the first extending portion, and a third inclined portion. A fourth inclined portion having a smaller inclination angle and including the most extended tip portion;
An inclination angle with respect to a predetermined extending direction of a line segment connecting an edge part closest to the cylindrical part of the first edge part and a tip part extending most of the first edge part is: The medical suction tool according to claim 5, wherein the medical suction tool is set to be smaller than an inclination angle of the third inclined portion and larger than an inclination angle of the fourth inclined portion. The internal space of the cylindrical portion has a circular cross-sectional shape in a plane orthogonal to a predetermined extending direction,
In a plane orthogonal to the predetermined extending direction, the inner peripheral surface of the cylindrical portion or the inner peripheral surface of the first extending portion and the inner peripheral surface of the second extending portion facing the inner peripheral surface are defined. The medical suction tool according to any one of claims 1 to 6, wherein the second extending portion is disposed so that the center position of the internal space of the cylindrical portion is located in the region to be formed.   In a plane orthogonal to the predetermined extending direction, the inner peripheral surface of the cylindrical portion or the inner peripheral surface of the first extending portion and the inner peripheral surface of the second extending portion facing the inner peripheral surface are defined. So that the area of the second extended portion is the same as the area of the region defined by the outer peripheral surface of the second extending portion and the inner peripheral surface of the first extending portion facing the outer peripheral surface. The medical suction tool according to claim 7, wherein the protruding portion is arranged. The cylindrical portion is inserted with a suction pipe connected to the suction force generating means, and has an insertion opening communicating with the internal space, and a step portion.
The medical suction tool according to any one of claims 1 to 8, wherein the step portion is formed so as to be able to contact an end edge of a suction pipe inserted from the insertion opening. The cylindrical portion is inserted with a suction pipe connected to the suction force generating means, and has an insertion opening communicating with the internal space.
The medical suction tool according to any one of claims 1 to 9, wherein the plurality of gripping protrusions protrude from the outer peripheral surface of the cylindrical portion in a direction orthogonal to a predetermined extending direction.

Images