Abstract: An interdental cleaning tool that achieves both easy insertion between teeth and improved cleaning effect is provided. The interdental cleaning tool 1 includes a base material portion 10 including a base section 11 and a shaft section 12 extending from the base section 11, and a soft portion 20 covering at least a part of the shaft section 12. The at least the part of the shaft section 12 has a first outer dimension X1 defined in a first direction D1 and a second outer dimension X2, defined in a second direction D3 perpendicular to the first direction D1 and smaller than the first outer dimension X1, in a cross section of the shaft section 12 perpendicular to an axial direction of the shaft section 12.

Abstract: Provided is an interdental cleaning tool that can reduce at least one of a resistance against insertion in an interdental space and a resistance against withdrawal from an interdental space, and has a high capability of scraping out deposit from an interdental space. The interdental cleaning tool includes a base portion including a shaft portion (20) and a cleaning portion (40). The cleaning portion (40) includes a cleaning portion body (50) and a plurality of bristles (60). The plurality of bristles (60) include at least one of a type of top end-oriented bristles and a type of base end-oriented bristles. The top end-oriented bristle has a shape titling to a top end side of the shaft portion (20) as advancing away from an outer circumferential surface of the cleaning portion body (50). The base end-oriented bristle has a shape tilting to a base end side of the shall portion (20) as advancing away from the outer circumferential surface of the cleaning portion body (50).

Abstract: An interdental cleaning tool includes a base portion including a shaft portion having a shape insertable in an interdental space, a top end side cleaning portion including a top end side body covering a top end side portion of the shaft portion, and a plurality of top end side bristles protruding outward from an outer circumferential surface of the top end side body, and a base end side cleaning portion including a base end side body covering a portion of the shaft portion further in a base end side than the top end side body, and a plurality of base end side bristles protruding outward from an outer circumferential surface of the base end side body. The top end side cleaning portion has a lower hardness than the base end side cleaning portion.

Abstract: In order to prevent shaft portion from being broken in ejection of base portion from mold, method for manufacturing interdental cleaning tool includes: base portion forming step of forming base portion by filling first space of primary mold (50) with synthetic resin, which includes first and second mold members (50A, 50B); and cleaning portion forming step of forming cleaning portion around shaft portion by filling second space of secondary mold with elastomer. Base portion forming step uses first and second mold members (50A, 50B). First and second molds include: first and second contact surfaces (51A, 51B); pair of first and second spaced-apart portions (54A, 54B); and first and second connection portions (52A, 52B), angle (?) between each of first and second spaced-apart portions (54A, 54B) and separation plane being acute.

Abstract: An interdental cleaning tool capable of reducing possibility of a cleaning portion being detached from a shaft portion includes a base portion including a shaft portion (20) having a shape insertable in an interdental space, and a cleaning portion (50) that covers at least a portion of the shaft portion and is capable of cleaning an interdental space. The base portion further includes a protruding portion (40) that protrudes from a covered portion (22) in a direction intersecting the shaft portion (20), the covered portion (22) being a portion of the shaft portion (20) and covered by the cleaning portion (50).

Abstract: An interdental cleaning tool (1) comprises a base (10) having a shaft (20) that has a shape to be inserted into an interdental space, wherein the base (10) is formed of a composite material comprising a synthetic resin, a reinforcement material and a low-hardness resin having a lower hardness than the hardness of the synthetic resin.

Abstract: To provide method for manufacturing interdental cleaner configured to suppress leakage of elastomer from space for forming slip resistance portion in mold to outside of space in step of filling elastomer into mold. Method for manufacturing interdental cleaner includes first step of molding base portion having handle portion and shaft portion (40) by filling composite material into first mold, and second step of forming cleaning portion and slip resistance portion by filling elastomer into second mold (200) with the base portion situated in second mold (200). In first step, what is molded has handle portion including base (24), recessed portion (26), and bulge portion (28) bulging from surface of the recessed portion (26). In second step, cleaning portion and slip resistance portion are formed by filling elastomer into second space from portion of base portion distant from bulge portion (28) toward shaft portion (40).

Abstract: To provide method for manufacturing interdental cleaner for suppressing elastomer from insufficiently filling into space around shaft portion in filling the elastomer into mold. Method for manufacturing interdental cleaner includes first step of molding base portion having handle portion and shaft portion (40) by filling composite material into first mold, and second step of forming cleaning portion, slip resistance portion and coupling portion by filling elastomer into second mold (200) from distal end portion side of shaft portion (40) with base portion situated in second mold (200), second mold (200) having second space for forming cleaning portion, slip resistance portion and coupling portion. What is used as second mold (200) in second step has ratio no less than 40% of a flow path area in second space for elastomer around distal end portion of handle portion to flow path area in second space for elastomer around proximal end portion of shaft portion (40).

Abstract: Provided is an interdental cleaning tool that can be smoothly inserted between back teeth. An interdental cleaning tool according to the present invention includes: a cleaning tool body that is made of a synthetic resin, and includes a grip portion that is capable of being gripped with fingers of a user and a shaft portion that extends in one direction from the grip portion; and a cleaning portion configured to clean between teeth, covering a leading end of the shaft portion, and made of an elastomer, wherein (angle b)/(angle a) is 0.

Abstract: An interdental cleaning tool (1) that includes a base (10) that has a shaft (20) shaped to be capable of being inserted between teeth, the base (10) being formed from a composite material that contains a synthetic resin, a reinforcement containing glass, and a copolymer having, as structural units, a polyolefin and an anhydride of an unsaturated carboxylic acid.

Abstract: An interdental cleaning tool is provided, which is capable of suppressing from being broken. The interdental cleaning tool 1 includes: a base material portion 10 including a base section 11 and a shaft section 12 extending from the base section 11; a soft portion 20 including a covering section 21 that covers a distal end part 12a of the shaft section 12, and a plurality of projections 22 extending from the covering section 21; and an extension soft portion 30 covering a middle part 12b of the shaft section 12, the middle part being located further toward the proximal side than the soft portion 20 so as to extend the covering section 21 toward the proximal side of the shaft section 12, the extension soft portion 30 not being provided with the projections 22.

Abstract: A method for manufacturing an interdental cleaning tool is provided that is capable of suppressing molding defects of the interdental cleaning tool.

Abstract: An interdental cleaning tool that achieves both easy insertion between teeth and improved cleaning effect is provided. The interdental cleaning tool 1 includes a base material portion 10 including a base section 11 and a shaft section 12 extending from the base section 11, and a soft portion 20 covering at least a part of the shaft section 12. The at least the part of the shaft section 12 has a first outer dimension X1 defined in a first direction D1 and a second outer dimension X2, defined in a second direction D3 perpendicular to the first direction D1 and smaller than the first outer dimension X1, in a cross section of the shaft section 12 perpendicular to an axial direction of the shaft section 12.

Abstract: The interdental cleaning tool includes a base portion including a shaft portion that extends from a base end side to a top end side and gradually becomes thinner from the base end side to the top end side, a top end side cleaning portion including a top end side body covering a top end side portion of the shaft portion and top end side bristles protruding outward from an outer circumferential surface of the top end side body, and a base end side cleaning portion including a base end side body covering a portion of the shaft portion in the base end side than the top end side body and base end side bristles protruding outward from an outer circumferential surface of the base end side body. The top end side cleaning portion has a higher hardness than the base end side cleaning portion.

Abstract: An interdental cleaning tool that is easily insertable in an interdental space by a user and has a high cleaning capability includes a base portion including a shaft portion having a shape insertable in an interdental space, and a cleaning portion that covers at least a portion of the shaft portion and is capable of cleaning an interdental space. The shaft portion has a triangular cross section on an orthogonal plane perpendicularly intersecting an axial direction of the shaft portion.

Abstract: Provided is an interdental cleaning tool that is not too soft and is unlikely to break during use. An interdental cleaning tool according to the present invention includes: a cleaning tool body that is made of a synthetic resin, and includes a grip portion that is capable of being gripped with fingers of a user and a shaft portion that extends in one direction from the grip portion; and a cleaning portion configured to clean between teeth, covering a leading end of the shaft portion, and made of an elastomer, wherein Y>?0.07X+3.3 is satisfied, where Y is a maximum torque value (N·cm) when the grip portion is rotated at a rotational speed of 10 rpm about a position located 15 mm away from a leading end of the cleaning portion, and X is a rotational angle (degrees) when the maximum torque value is measured.

Abstract: An interdental cleaning tool capable of reducing possibility of a cleaning portion being detached from a shaft portion includes a base portion including a shaft portion (20) having a shape insertable in an interdental space, and a cleaning portion (50) that covers at least a portion of the shaft portion and is capable of cleaning an interdental space. The base portion further includes a protruding portion (40) that protrudes from a covered portion (22) in a direction intersecting the shaft portion (20), the covered portion (22) being a portion of the shaft portion (20) and covered by the cleaning portion (50).

Abstract: The cleaning portion includes a cleaning portion body and a brush portion. The brush portion includes a first brush group and a second brush group. Bristles of the first brush group and the second brush group each have a shape whose a protruding length from the cleaning portion body gradually increases from a top end side to a base end side of the shaft portion. A protruding length from the cleaning portion body of a predetermined numbered one of the second brush group from the top end side to the base end side of the shaft portion is larger than a protruding length from the cleaning portion body of the predetermined numbered one of the bristles of the first brush group from the top end side to the base end side of the shaft portion.

Abstract: Provided is an interdental cleaning tool that can reduce at least one of a resistance against insertion in an interdental space and a resistance against withdrawal from an interdental space, and has a high capability of scraping out deposit from an interdental space. The interdental cleaning tool includes a base portion including a shaft portion (20) and a cleaning portion (40). The cleaning portion (40) includes a cleaning portion body (50) and a plurality of bristles (60). The plurality of bristles (60) include at least one of a type of top end-oriented bristles and a type of base end-oriented bristles. The top end-oriented bristle has a shape titling to a top end side of the shaft portion (20) as advancing away from an outer circumferential surface of the cleaning portion body (50). The base end-oriented bristle has a shape tilting to a base end side of the shaft portion (20) as advancing away from the outer circumferential surface of the cleaning portion body (50).

Abstract: An interdental cleaning tool (2) includes a base portion (10) having a shaft portion (20) and a grip portion (30), and a cleaning portion (40). The cleaning portion (40) has a cleaning portion main body (42) and brush portions (44). Each of the brush portions (44) has a brush main body having a shape protruding outward from the cleaning portion main body in an axially intersecting direction, and a protrusion that has a shape protruding outward in a reference plane, which is a plane encompassing a center axis of the shaft portion (20) and a center axis of the brush main body, from an outer edge of the brush main body when the brush main body is cut along the reference plane, and is continuously connected along the outer edge of the brush main body.