JP2016193084A - Interdental cleaning implement - Google Patents

Abstract

An object of the present invention is to prevent the occurrence of discomfort due to contact with teeth, to ensure sufficient cleaning between teeth, to be excellent in durability and to be manufactured at low cost, and to prevent occurrence of metal allergy. Provide cleaning tools. An interdental cleaning tool including a brush member having an interdental cleaning brush portion and a handle member serving as a handle portion of the brush member. It consists of a solid core material made of resin material and a wing material made of a resin material different from the resin material that makes up the core material, and the wing material is externally attached to the core material. A tooth portion formed between the sheath portion and at least one wing portion extending outward from the sheath portion in a direction orthogonal to the length direction of the core material, wherein the core material and the wing material are integrally molded simultaneously. The wire for cleaning tools was used. [Selection] Figure 1

Description

  The present invention relates to an interdental cleaning tool having a brush portion made of a resin material.

  As an interdental cleaning tool, wire strands made of fine metal wires are folded in half and a filament is placed between them. The wire strands are twisted to plant the filaments against the wire strands, and then the filaments have a desired length. An interdental brush provided with a brush body that is cut into a cylindrical shape and formed into a columnar shape or a truncated cone shape is widely used (see, for example, Patent Document 1).

  A base portion made of a synthetic resin; and a soft portion made of an elastomer, wherein the base portion is a handle base portion and an elongated shaft-shaped core base provided at a tip portion of the handle base portion And the soft part has at least a soft part for cleaning that covers the core base part, and the handle base part constitutes a handle part as a handle, and the core base part The interdental cleaning tool which comprised the cleaning part for interdental cleaning with the soft part for cleaning is also proposed, and is utilized (for example, refer patent document 2).

  On the other hand, as a binding tool, a shapeable monofilament made of a thermoplastic resin composition containing inorganic particles made of barium sulfate and / or calcium carbonate is used as a core material, and the core material is sandwiched between two tape-shaped resin films. , And a binding tool that can hold the twisted state when twisted by applying an external stress (for example, a patent) Reference 3).

JP 2014-33869 A Japanese Patent No. 4236571 JP 2014-88636 A

  In the interdental brush described in Patent Document 1, the number of manufacturing processes is large and the manufacturing cost is high due to the twisted wire strands and the filaments are implanted, and the tip of the metal wire hits the teeth. There are problems such as that the folded part of the tip of the wire may get caught between teeth, which may cause unpleasant feelings, that people who are allergic to metals cannot use it, and that the wire breaks due to metal fatigue.

  On the other hand, in the interdental cleaning tool described in Patent Document 2, since the core material made of synthetic resin is covered with the soft part made of elastomer, it is possible to prevent discomfort due to contact with or catching the teeth as described above, and metal Can be used by allergic people. However, the core base part made of synthetic resin has low strength and rigidity compared to metal wires, so if it is configured to have a large diameter, insertability between teeth decreases, and conversely, insertability between teeth When considering a small diameter, the core base material part does not plastically deform like a wire because it is relatively easy to fold. Since the cleaning part is made of an elastomer, there is a problem that the cleaning ability between the teeth is inferior compared with the interdental brush.

  The object of the present invention is to prevent the occurrence of discomfort due to contact with teeth, to ensure sufficient cleaning between teeth, and to be excellent in durability and inexpensive to manufacture, and may cause metal allergy. There is no provision for interdental cleaning tools.

  An interdental cleaning tool according to the present invention is an interdental cleaning tool including a brush member having a brush part for interdental cleaning and a handle part of the brush member, and the interdental tooth constituting the brush member As a wire for a cleaning tool, it comprises a solid core material made of a resin material and a feather material made of a resin material different from the resin material constituting the core material, and the feather material is externally attached to the core material. And at least one wing portion extending outward from the sheath portion in a direction perpendicular to the length direction of the core material, and the core material and the wing material are integrally molded at the same time. The wire for the interdental cleaning tool is used.

  In this interdental cleaning tool, interdental cleaning is performed with a wire for an interdental cleaning tool comprising a solid core material made of a resin material and a wing material made of a resin material different from the resin material constituting the core material. Since the brush member of the tool is configured and no wire element is used, the occurrence of discomfort due to the contact between the brush member and the teeth can be prevented, and the durability can be improved by properly selecting the resin material. An interdental cleaning tool that can be used by people who are allergic to metals can be realized. Moreover, since the wing | blade part extended in the direction orthogonal to the length direction of a core material is formed in a wing material and an interdental can be cleaned by this wing | blade part, the cleaning property equivalent to an interdental brush is ensured. It becomes possible. Furthermore, since the core material and the feather material can be simultaneously integrally formed to produce the interdental cleaning tool wire, the production cost of the brush member can be reduced compared to the interdental brush.

  Here, at a position corresponding to the brush portion, a cut or notch is formed in the width direction of the wing portion with an interval in the length direction of the wing portion, and the wing portion is formed into a plurality of brush hairs. It is a preferred embodiment that the configuration is divided. The wing portion can be used without being divided into a plurality of brush bristles, but when divided into a plurality of brush bristles as in the present invention, a plurality of brush portions are provided in the same manner as a conventional interdental brush. This is preferable because it can improve the cleaning between teeth and improve the insertion between the teeth. In the interdental cleaning tool described in Patent Document 2, a hard elastomer cannot be used. However, in the present invention, since the brush hair can be thinned, the effect of cleaning can be improved by using a hard resin.

  In the case of dividing the wing portion, it is preferable to divide the blade into 50 to 200 brush / cm. The number of divisions of the wings can be arbitrarily set. However, when the number of wings is less than 50 / cm, the cleaning property between the teeth decreases, and when the number exceeds 200 / cm, the brush hair easily breaks. It is preferable to set to ~ 200 / cm.

  Moreover, it is preferable to set the width | variety of the said bristle with respect to the length direction of the said wing | blade to 0.05 mm-0.25 mm. The width of the bristle can be arbitrarily set, but if it is less than 0.05 mm, the bristle is easily cut, and if it exceeds 0.25 mm, the cleaning property between the teeth decreases, so 0.05 mm to It is preferable to set to 0.25 mm.

  The ratio α / 2β between the maximum width α of the core material and the maximum distance β from the tip of the wing portion to the center of the core material in a cross-sectional direction orthogonal to the length direction of the core material is 0.025. It is a preferred embodiment to set to ~ 0.75. When the ratio α / 2β is less than 0.025, the wing part becomes long and easily damaged. When the ratio α / 2β exceeds 0.75, the maximum width of the core material becomes too large, and between the teeth of the brush part. The insertability is reduced, and the cleanability is reduced.

  It is also a preferred embodiment that the maximum width α of the core material in the cross-sectional direction orthogonal to the length direction of the core material is set to 0.2 to 1.5 mm. That is, when the maximum width α of the core material is less than 0.2 mm, it becomes difficult to ensure sufficient shape stability of the interdental cleaning tool wire during plastic deformation, and the interdental cleaning tool wire If the thickness of the sheath part exceeds 1.5 mm, the outer shape of the sheath part of the interdental cleaning tool wire becomes large, and the insertion property between the teeth is reduced. It is preferable to set to 5 mm.

  In a preferred embodiment, the maximum distance β from the tip of the wing portion to the center of the core material in a cross-sectional direction orthogonal to the length direction of the core material is set to 1.0 to 4.0 mm. . The maximum distance β can be appropriately set according to the interdental size, but by being configured as in the present invention, it is possible to sufficiently ensure the insertability of the interdental cleaning tool wire into the interdental region and to clean the interdental region. Enough to secure.

  A maximum distance β from the tip of the wing portion to the center of the core material in a cross-sectional direction orthogonal to the length direction of the core material is configured to vary along the length direction of the core material. Is also a preferred embodiment. If comprised in this way, the cleaning property between the teeth by a wing | blade part can be improved.

  In a preferred embodiment, the length γ of the wing portion in the cross-sectional direction orthogonal to the length direction of the core material is set to 0.75 to 3.85 mm. In this case, the insertion property between the teeth of the interdental cleaning tool wire can be sufficiently secured.

  In a preferred embodiment, the thickness of the wing is set to 0.05 to 0.20 mm. When the thickness of the wing part is too thick, the feeling of use is lowered. When the thickness is too thin, the moldability is lowered and the wing part may be damaged during interdental cleaning, so the thickness is set to 0.05 to 0.20 mm. It is preferable.

  In a preferred embodiment, the maximum width δ of the sheath portion in the cross-sectional direction orthogonal to the length direction of the core material is set to 0.3 to 2.0 mm. If comprised in this way, the insertion property of the interdental cleaning tool wire between teeth can fully be ensured, preventing peeling of a sheath part.

  In a preferred embodiment, the weight ratio W1 / W2 between the weight W1 of the core material and the weight W2 of the feather material per unit length is set to 20/80 to 60/40.

  It is a preferred embodiment to provide a pair of wings on both sides of the sheath. The number of wings can be set arbitrarily, but if a pair of wings are provided on both sides of the sheath, the formability of the interdental cleaning tool wire can be sufficiently secured, and the interdental cleaning tool Can be sufficiently cleaned. Further, since the interdental cleaning tool wire can be formed into an elongated flat string shape, the interdental cleaning tool wire is not bulky and is easy to handle.

  The cross-sectional shape orthogonal to the length direction of the core material is preferably a circular shape, a shape in which two or more circles or a flat circle partially overlap, an ellipse, a polygon, or an indeterminate shape. A line-symmetric or point-symmetric cross-sectional shape is particularly preferable.

  In a preferred embodiment, the core material is configured to be plastically deformable. If comprised in this way, it will become possible to bend the core material between a brush part and a handle part, and to adjust the angle of the brush part with respect to a handle part to the angle which is easy to insert between teeth. Further, the interdental cleaning tool wire is twisted around the core material, and the wings are formed in a spiral shape, so that the cleaning performance equivalent to that of the interdental brush can be ensured.

  In a preferred embodiment, the interdental cleaning tool wire is twisted around the core material and the wings are formed in a spiral shape. By comprising in this way, it becomes possible to ensure the cleaning property equivalent to an interdental brush.

  In a preferred embodiment, the number of twists is set to 10 times / cm or less. The number of twists can be set arbitrarily, but if it exceeds 10 times / cm, the shape of the brush part becomes distorted, the appearance of the brush part is lowered, and the cleaning property between teeth is lowered. It is preferable to set it to 10 times / cm or less. In this specification, the number of twists is defined as the number of twists of 1 when the interdental cleaning tool wire is twisted and rotated 360 ° around the core. .

  The outer shape of the brush portion can be formed in a columnar shape, a substantially truncated cone shape, or a substantially barrel shape. Although the external shape of a brush part can be set arbitrarily, it is preferable when forming in column shape, substantially truncated cone shape, or substantially barrel shape, when improving the cleaning property between teeth.

  It is preferable that the brush member and the handle portion are constituted by separate members, and the attachment portion to the handle portion of the brush member is constituted by a core material and a sheath portion of the interdental cleaning tool wire. It is a form. Although it is possible to configure the brush part and the handle part with an interdental cleaning tool wire, it is preferable to configure both of them as separate members in order to improve the operability of the brush part.

  However, the brush member and the handle portion can be formed of the interdental cleaning tool wire. In this case, the operability is somewhat lowered as compared with the case where a handle portion made of another member is provided, but it is preferable because an interdental cleaning tool can be manufactured at low cost.

  In a preferred embodiment, the feather material is made of a thermoplastic elastomer, polyester, polyamide or polyolefin resin. It is preferable to make the wing material with such a material because the contact with the gingiva becomes soft and the feeling of use can be improved.

  An interdental cleaning tool manufacturing method according to the present invention is an interdental cleaning tool manufacturing method including a brush member having a brush portion for interdental cleaning, and a handle portion of the brush member, and different resins. Using a material, a solid core material, a wing material provided integrally with the core material, and a sheath part sheathed on the core material, and perpendicular to the length direction of the core material from the sheath part A wire manufacturing process for manufacturing a wire for an interdental cleaning tool that forms at least the brush member by simultaneously integrally forming a blade having at least one blade extending outward in the direction of It is.

  In this manufacturing method, since a core material and a feather material are simultaneously integrally formed to produce an interdental cleaning tool wire, and a brush member can be manufactured using this, an interdental cleaning tool having a brush member made of a resin material Can be manufactured at low cost. In addition, the interdental cleaning tool manufactured by this manufacturing method has a brush member made of only a resin material, and does not use wire strands unlike conventional interdental brushes. In addition to preventing the generation of pleasure, it is possible to improve the durability by appropriately selecting the resin material, and it is possible to realize an interdental cleaning tool that can be used even by people who are allergic to metals. Moreover, since the wing | blade part extended in the direction orthogonal to the length direction of a core material is formed in a wing material and an interdental can be cleaned by this wing | blade part, the cleaning property equivalent to an interdental brush is ensured. It becomes possible.

  A plurality of the wings are formed by forming notches or notches in the width direction of the wings at intervals corresponding to the length of the wings at positions corresponding to the brushes in the interdental cleaning tool wire. It is a preferred embodiment that includes a bristle forming step for dividing the bristle into a book. In this case, the brush part is composed of a plurality of brush bristles by applying simple processing such as pressing with a blade or laser processing to the wing part, further improving the cleanability between teeth by the brush part. It can be improved.

  The wire for an interdental cleaning tool in which the plurality of brush bristles are formed is twisted a certain number of times around the core material, and the plurality of brush bristles are arranged in a spiral shape around the core material And it is preferable embodiment to provide the brush part formation process which forms a brush part. By providing such a configuration, the outer shape of the brush portion formed of a plurality of brush bristles can be formed in a columnar shape, a conical shape, or a barrel shape, and the cleanability of details between teeth can be further improved.

  According to the interdental cleaning tool according to the present invention, for an interdental cleaning tool comprising a solid core material made of a resin material and a feather material made of a resin material different from the resin material making up the core material. Since the brush member of the interdental cleaning tool is made of wire material and no wire strand is used, it is possible to prevent the occurrence of discomfort due to contact between the brush member and the tooth, and durability is ensured by properly selecting the resin material And an interdental cleaning tool that can be used by people who are allergic to metals. Moreover, since the wing | blade part extended in the direction orthogonal to the length direction of a core material is formed in a wing material and an interdental can be cleaned by this wing | blade part, the cleaning property equivalent to an interdental brush is ensured. It becomes possible. Furthermore, since the core material and the feather material can be simultaneously integrally formed to produce the interdental cleaning tool wire, the production cost of the brush member can be reduced compared to the interdental brush.

  According to the manufacturing method of the interdental cleaning tool according to the present invention, since the core material and the feather material are simultaneously integrally formed to manufacture the interdental cleaning tool wire, and the brush member can be manufactured using this, the resin material The interdental cleaning tool which has the brush member which consists of can be manufactured cheaply. In addition, the interdental cleaning tool manufactured by this manufacturing method has a brush member made of only a resin material, and does not use wire strands unlike conventional interdental brushes. In addition to preventing the generation of pleasure, it is possible to improve the durability by appropriately selecting the resin material, and it is possible to realize an interdental cleaning tool that can be used even by people who are allergic to metals. Moreover, since the wing | blade part extended in the direction orthogonal to the length direction of a core material is formed in a wing material and an interdental can be cleaned by this wing | blade part, the cleaning property equivalent to an interdental brush is ensured. It becomes possible.

Perspective view of interdental cleaning tool Front view of interdental cleaning tool Perspective view of interdental cleaning tool wire Sectional view taken along line IV-IV in FIG. (A) is explanatory drawing of an attaching part formation process, (b) is explanatory drawing of a bristle forming process. Explanatory drawing of brush hair formation process Explanatory drawing of brush part formation process (A)-(c) is a front view of the unit brush member of another structure. Front view of unit brush member of other configuration Front view of the interdental cleaning tool of other composition which changed the handle part (A)-(c) is a cross-sectional view of the wire material for interdental cleaning tools of the other structure which changed the structure of the core material (A) (b) is a cross-sectional view of a wire for an interdental cleaning tool of another configuration in which the number of wings is changed (A)-(c) is a cross-sectional view of the wire material for interdental cleaning tools of the other structure which changed the shape of the front-end | tip part of a wing | blade part The graph which shows the relationship between the frequency | count of twist and cleaning property in the brush member whose width | variety of a bristle is 0.10 mm, 0.15 mm, and 0.20 mm A graph showing the relationship between the number of twists and the cleaning performance of a cylindrical frustoconical brush part

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 and 2, the interdental cleaning tool 10 is an interdental cleaning brush comprising an elongated linear core portion 11 and a plurality of brush bristles 12 a provided at the tip side portion of the core portion 11. A brush member 13 having a portion 12 and a handle member 14 as a handle portion of the brush member 13 are provided. An insertion guide portion 11a between teeth protruding from the distal end portion of the brush portion 12 is provided at the distal end portion of the core wire portion 11, and a proximal end side portion of the core wire portion 11 is embedded in the handle member 14 so that the brush member 13 is embedded. Is attached to the handle member 14 integrally.

  The handle member 14 can be made of a resin material similar to a handle member of a known interdental brush. For example, polyethylene, polypropylene, polyamide, polystyrene, thermoplastic elastomer (TPR), acrylonitrile-butadiene-styrene (ABS). It can be made of resin or the like.

  Further, the handle member 14 can be formed in any shape as long as the handle member 14 can be grasped with a finger and the brush portion 12 can be easily operated, and the cross-sectional shape thereof is circular, elliptical, pentagonal, hexagonal, etc. The polygonal shape can be configured in the same manner as a handle member of a known interdental brush.

  The brush member 13 is manufactured using the interdental cleaning tool wire 1 configured as shown in FIGS. 3 and 4. This interdental cleaning tool wire 1 is composed of a solid core material 2 made of a resin material and a feather material 3 made of a resin material different from the resin material constituting the core material 2. A sheath 3a that is sheathed on the core 2, and at least one wing 3b that extends from the sheath 3a outward in a direction orthogonal to the length direction of the core 2, and the core 2 and the wing The material 3 is integrally molded at the same time.

  The core wire portion 11 of the brush member 13 is composed of the core material 2 and the sheath portion 3a of the interdental cleaning tool wire 1, and the brush portion 12 of the brush member 13 is the wing portion 3b of the interdental cleaning tool wire 1. It is configured. The plurality of brush bristles 12a constituting the brush portion 12 has a cut 15 (see FIG. 6) formed by a cut or notch extending in the width direction on the wing portion 3b of the interdental cleaning tool wire 1 and the length of the wing portion 3b. A plurality of wings 3b are formed at intervals in the vertical direction, and the wing portion 3b is divided into a plurality of brush bristles 12a. In this state, the interdental cleaning tool wire 1 is twisted around the core wire portion 11. As shown in FIGS. 1 and 2, the plurality of brush bristles 12 a are formed in a spiral shape that protrudes radially outward from the core wire portion 11 and circulates along the core wire portion 11. The outer shape of the brush portion 12 is formed in a substantially cylindrical shape by a plurality of brush bristles 12a.

  Here, an example of the manufacturing method of the brush member 13 using the wire 1 for interdental cleaning tools is demonstrated.

  First, in the wire manufacturing process, the core material 2 and the feather material 3 are simultaneously integrally formed using different resin materials, and the interdental cleaning tool wire 1 as shown in FIGS. 3 and 4 is manufactured. More specifically, two extruders are connected immediately before the die, and the resin material constituting the core material 2 and the resin material constituting the feather material 3 are simultaneously extruded from the die, and the interdental cleaning tool wire. 1 will be integrally molded simultaneously. However, it is also possible to adopt a manufacturing method in which the core material 2 is manufactured in advance, and this is extruded onto the central portion of the tape-like feather material 3 using a crosshead die and integrated.

  Next, in the attachment portion forming step, as shown in FIG. 5A, the blade portions 3b at the positions corresponding to the insertion guide portion 11a and the attachment portion 11b are sequentially cut and inserted by pressing or laser processing. The interdental cleaning tool wire 10A is formed by continuously forming a plurality of unit brush members 13A having a length L1 having a wing portion 12A at a position corresponding to the brush portion 12 while forming the guide portion 11a and the attachment portion 11b. To manufacture.

  Next, in the bristle forming step, as shown in FIGS. 5B and 6, the wing portion 12 </ b> A is formed by a cut or notch extending in the width direction of the wing portion 12 </ b> A by press processing, laser processing, or the like. A plurality of unit brush members 13B each having a brush portion 12B in which a plurality of cuts 15 are formed at intervals in the length direction of the wing portion 12A and the wing portion 12A is divided into a plurality of brush bristles 12a are continuously provided. The interdental cleaning tool wire 10B is manufactured. However, the attachment portion forming step and the brush bristle forming step can be performed in the same step, or after the brush bristle forming step is performed, the attachment portion forming step can be performed.

  Next, in the brush portion forming step, as shown in FIG. 7, after twisting the brush portion 12 </ b> B in the direction of arrow R a certain number of times around the core wire portion 11, the interdental cleaning tool wire 10 </ b> B is brushed. While cutting to the length L1 of the member 13, the front-end | tip part of the insertion guide part 11a is grind | polished hemispherically, and the brush member 13 is manufactured. However, it is also possible to manufacture the brush member 13 by cutting the interdental cleaning tool wire 10B to the length L1 of the brush member 13 and then twisting it in the direction of the arrow R a predetermined number of times. Further, after cutting the interdental cleaning tool wire 1 manufactured in the wire manufacturing process into the length L1 of the brush member 13, the blade 3b at a position corresponding to the insertion guide portion 11a and the attachment portion 11b is cut, and then It is also possible to manufacture by forming the bristle 12a and twisting around the core part 11.

  The number of divisions of the wing portion 12A in the brush bristle forming step can be arbitrarily set. However, when it is less than 50 / cm, the cleaning property between the teeth decreases, and when it exceeds 200 / cm, Since it becomes easy to cut | disconnect 12a, it is preferable to set to 50-200 piece / cm.

  The width W of the bristles 12a can be arbitrarily set. However, when the width is less than 0.05 mm, the bristles 12a are easily cut, and when the width exceeds 0.25 mm, the cleaning ability between the teeth decreases. It is preferable to set to 0.05 mm to 0.25 mm. The brush portions 12B may be configured by brush hairs 12a having the same width W, or may be configured by mixing brush hairs 12a having different widths W.

  The cut line 15 may be formed perpendicular to the core wire part 11 or may be formed at an angle with respect to the core wire part 11. Specifically, as in the unit brush member 13BD shown in FIG. 9, instead of the brush portion 12B, a brush portion 12BD is formed by forming an angle 15D obliquely with respect to the core wire portion 11, The brush portion 12BD can be divided into a plurality of brush bristles 12BDa. In addition, the cut lines 15 and 15D are formed in a straight line shape, but are formed in a wave shape such as a sine wave shape, a triangular wave shape, a sawtooth shape or a rectangular wave shape, a curved shape such as an arc shape, or a combination shape of a straight line and a curved line. Is also possible.

  The number of twists of the brush part 12 can be arbitrarily set. However, if it exceeds 10 times / cm, the shape of the brush part 12 becomes distorted and the appearance of the brush part 12 deteriorates. It is preferable to set it to cm or less.

  The length L2 of the brush portion 12 can be arbitrarily set, but is preferably set to 7 mm or more and 15 mm or less in order to ensure operability during interdental cleaning.

  The outer shape of the brush part 12 is arbitrarily rotationally symmetric according to the shape of the brush part 12B by adjusting the distance from the center of the core part 11 to the outer edge of the brush part 12B along the length direction of the brush part 12B. Although it can be formed into a shape, it is preferable to form in a columnar shape, a substantially truncated cone shape, or a substantially barrel shape in order to improve the cleaning performance between teeth. In the present embodiment, as shown in FIG. 6, the brush portion 12B is formed in a rectangular shape, and the outer shape of the brush portion 12 after twisting is formed in a cylindrical shape, but as shown in FIG. As in the unit brush member 13BA, instead of the brush portion 12B, the brush portion 12BA is formed so that the middle portion in the lengthwise direction becomes wider and narrows toward the both end sides. 12BA is divided into a plurality of brush bristles 12BAa, and the unit brush member 13BA is twisted to form the outer shape of the brush portion in a substantially barrel shape, or like the unit brush member 13BB shown in FIG. 8B. In addition, instead of the brush portion 12B, the brush portion 12BB is formed so that one end portion in the length direction becomes wider and the width becomes narrower toward the other end portion. Brush hair 12BB Split configuration, by twisting the unit brush member 13BB, can be or form the outer shape of the brush portion in a truncated cone shape. Further, like the unit brush member 13BC shown in FIG. 8C, instead of the brush portion 12B, a brush portion 12BC having an outer edge formed in a wave shape such as a sine wave shape, a triangular wave shape, a sawtooth shape or a rectangular wave shape is formed. However, the brush portion 12BC can be divided into a plurality of brush bristles 12BCa by the cut 15.

  Further, the wing portion 12A is not divided into brush bristles 12a, but is directly twisted around the core wire portion 11, and the brush portion can be constituted by the spirally twisted wing portion. It is. Moreover, it is also possible to comprise a brush part with the flat-shaped wing | blade part 12A, without twisting the wire 1 for interdental cleaning tools helically. When not twisted spirally, it is also possible to manufacture the interdental cleaning tool wire 1 using a material that does not undergo plastic deformation.

  Further, as in the interdental cleaning tool 10E shown in FIG. 10, instead of the handle member 14 and the attachment portion 11b, the core material 2 and the feather material 3 of the interdental cleaning tool wire 1 are left as they are to form the handle portion 14E. And it is also possible to comprise the brush member 13E and the handle part 14E only with the wire 1 for interdental cleaning tools. In this case, the operability is somewhat lower than when the handle member 14 is provided, but it is preferable because the interdental cleaning tool 10 can be manufactured at a low cost.

Next, the wire 1 for interdental cleaning tools is demonstrated.
As shown in FIGS. 3 and 4, the interdental cleaning tool wire 1 includes a solid core material 2 made of a resin material and a feather material made of a resin material different from the resin material constituting the core material 2. 3 and the wing material 3 is sheathed on the core material 2, and at least one wing portion 3 b extending from the sheath part 3 a to the outer side in the direction orthogonal to the length direction of the core material 2. The core material 2 and the feather material 3 are integrally formed at the same time.

  As the resin material constituting the core material 2, polyester resins such as polyethylene terephthalate (hereinafter referred to as PET), polybutylene terephthalate (hereinafter referred to as PBT), polyethylene naphthalate, polycyclohexanedimethylene terephthalate, and copolymers thereof, nylon 6. Polyamide resins such as nylon 66, nylon 610, nylon 612, nylon 6/66 copolymer and copolymers thereof, polyvinylidene fluoride, ethylene / tetrafluoroethylene copolymer, tetrafluoroethylene / hexafluoropropylene / fluoride Fluorine resin such as vinylidene fluoride copolymer, polyolefin resin such as polyethylene and polypropylene, polyphenylene sulfide resin (hereinafter referred to as PPS), polyether ether ketone resin (PEEK), A thermoplastic resin such as acetal resin can be suitably used, but at least one resin material selected from polyester, polyamide, PPS, PEEK from the viewpoint of strength, toughness, and use safety in the oral cavity should be adopted. Is preferred.

  As the resin material constituting the wing material 3, in consideration of interdental cleaning properties, thermoplastic elastomers such as styrene, olefin, and polyamide, PET, PBT, polyethylene naphthalate, polycyclohexanedimethylene terephthalate, etc. It is possible to employ at least one resin material selected from polyester resins and copolymers thereof, polyamide resins such as nylon 6, nylon 66, nylon 610, nylon 612, nylon 6/66 copolymer, and copolymers thereof. preferable.

  The resin material of the core material 2 contains inorganic particles so that the interdental cleaning tool wire 1 can be plastically deformed. The material of the inorganic particles is glass beads, talc, silica, mica, calcium carbonate, magnesium hydroxide, alumina, zinc oxide, magnesium oxide, magnesium hydroxide, silica alumina, titanium oxide, calcium oxide, calcium silicate, sulfide. Molybdenum, antimony oxide, clay, diatomaceous earth, calcium sulfate, calcium sulfite, calcium phosphate, iron oxide, barium sulfate, magnesium carbonate, basic magnesium carbonate, dolomide, montmorillonite, bentonite, iron powder, lead powder, zinc powder, aluminum powder, carbon Black etc. can be illustrated. Among these, it is particularly preferable to employ at least one selected from barium sulfate, calcium carbonate, and calcium phosphate from the viewpoint of dispersibility in a thermoplastic resin and cost.

  Thus, when inorganic particles are blended in the resin material constituting the core material 2, the elastic recovery of the core material 2 is suppressed, and the core material 2 is configured to be plastically deformable. For example, the wire 1 for interdental cleaning tools. When twisted, excellent shapeability is obtained in which the twisted shape is maintained by plastic deformation of the core material 2. Although the mechanism of improving the shapeability by containing the inorganic particles is not clear, the inorganic particles dispersed in the resin material partially inhibit the interaction between the resin polymer chains. It is presumed that it has excellent shapeability because a micro void is created at the time of deformation, and further, this micro void undergoes irreversible deformation such as distortion or tearing. The core material 2 is preferably stretched to further improve the shapeability.

Next, a specific shape of the interdental cleaning tool wire 1 will be described with reference to the drawings.
As shown in FIGS. 3 and 4, the interdental cleaning tool wire 1 includes a solid core material 2 made of a resin material and a feather material made of a resin material different from the resin material constituting the core material 2. 3 and a wing material 3 having a sheath portion 3a sheathed on the core material 2 and at least one wing portion 3b extending outward from the sheath portion 3a in a direction orthogonal to the length direction of the core material 2. And the core material 2 and the feather material 3 are integrally formed at the same time, and the maximum width α of the core material 2 in the cross-sectional direction orthogonal to the length direction of the core material 2 and the core material from the tip of the wing part 3b. The ratio α / 2β to the maximum distance β to the center P of 2 is set to 0.025 to 0.75.

  The core material 2 is preferably configured to be plastically deformable by adding inorganic particles to the resin material constituting the core material 2 as described above. With such a configuration, when the interdental cleaning tool wire 1 is twisted, the twisted shape is maintained by plastic deformation of the core member 2, and for example, the interdental tooth shown in FIGS. 3 and 4. Like the cleaning tool wire 1, the interdental cleaning tool wire 1 is twisted around the core material 2, whereby the core material 2, the feather material 3, the sheath portion 3 a, and the wing of the interdental cleaning tool wire 1. The core material 2, the feather material 3, the sheath portion 3a, and the feather portion 3b are formed by twisting the portion 3b, and the spirally formed feather portion 3b is used as a cleaning portion of the interdental cleaning tool 10. Thus, the scraping effect can be enhanced by the wing portion 3b, and the cleaning performance between the teeth can be further improved. Moreover, in consideration of the insertion direction between the teeth, the interdental cleaning tool wire 1 can be bent to improve the insertion property between the molar portions.

  The cross-sectional shape (transverse cross-sectional shape) orthogonal to the length direction of the core material 2 can be formed in a circle like the core material 2 shown in FIG. However, the cross-sectional shape orthogonal to the length direction of the core material 2 can be formed in an arbitrary shape, for example, a shape in which two or more circles or flat circles partially overlap, an ellipse, a polygon Or, if formed indefinitely, even if the interdental cleaning tool wire 1 is twisted, the core material 2 and the feather material 3 are physically and mechanically engaged to prevent relative rotation between the two. It is preferable for maintaining the shape of the interdental cleaning tool wire 1 in a twisted state. Specifically, as in the interdental cleaning tool wire 1A shown in FIG. 11 (a), the cross-sectional shape of the core material 2A is formed into a mayu shape in which two circles partially overlap, A three-leafed structure in which the sheath 3Aa is formed in a corresponding shape or the cross-sectional shape of the core 2B is partially overlapped with three circles as in the interdental cleaning tool wire 1B shown in FIG. Form the shape, or form the cross-sectional shape of the core material 2C in a rectangular shape like the wire 1C for interdental cleaning tool shown in FIG. 11 (c), and form the sheath 3Ca in a shape corresponding thereto can do.

  The maximum width α of the core material 2 can be arbitrarily set, but is preferably set to 0.2 to 1.5 mm, and more preferably 0.4 to 1.0 mm. That is, when the maximum width α of the core material 2 is less than 0.2 mm, it becomes difficult to ensure sufficient shape stability of the interdental cleaning tool wire 1 during plastic deformation, and the interdental cleaning tool. The durability of the wire 1 cannot be sufficiently secured, and if it exceeds 1.5 mm, the outer shape of the sheath portion 3a of the interdental cleaning tool wire 1 becomes large, and the insertability between the teeth decreases. It is preferable to set to 2 to 1.5 mm.

  The wing part 3b is formed so that the center line of the core member 2 is disposed in a plane including the center in the thickness direction. However, the wing part 3b can also be formed so that the surface including the center in the thickness direction of the wing part 3b is disposed at a position offset from the center line of the core member 2.

  The thickness T of the wing portion 3b can be set arbitrarily, but if it is too thick, the feeling of use during interdental cleaning is reduced, and if it is too thin, the moldability is reduced and the wing portion 3b is damaged during interdental cleaning. Therefore, it is preferable to set the thickness to 0.05 to 0.20 mm, desirably 0.05 to 0.125 mm.

  The number of the wing portions 3b is set to two in the wing material 3 of the interdental cleaning tool wire 1 shown in FIGS. 3 and 4, but may be set to one or three or more. . For example, one sheet may be used like the wing material 3D of the interdental cleaning tool wire 1D shown in FIG. 12A, or like the wing material 3E of the interdental cleaning tool wire 1E shown in FIG. Four can also be provided. When a plurality of wings 3b are provided, the angles formed by adjacent wings 3b can be set to the same or different angles.

  The length γ of the wing portion 3b in the cross-sectional direction orthogonal to the length direction of the core material 2 can be arbitrarily set. However, when the length is less than 0.75 mm, sufficient cleaning between teeth can be secured. If it exceeds 3.85 mm, the insertion property between the teeth of the interdental cleaning tool wire 1 is lowered, so it may be set to 0.75 to 3.85 mm, preferably 1.0 to 3.0 mm. preferable.

  The maximum distance β from the tip of the wing 3b to the center P of the core material 2 is preferably set to 1.0 to 5.0 mm, and more preferably 1.3 to 4.0 mm. The maximum distance β can be appropriately set according to the interdental size. However, when the maximum distance β is set to 1.0 to 5.0 mm, the insertability of the interdental cleaning tool wire 1 between the teeth can be sufficiently ensured. At the same time, sufficient cleaning between teeth can be secured.

  The tip part (outer edge) of the wing part 3b can be configured with a tapered taper 4 such as the wing part 3Fb of the wing material 3F of the interdental cleaning tool wire 1F shown in FIG. Like the wing part 3Gb of the wing material 3G of the interdental cleaning tool wire 1G shown in FIG. 13 (b), it can be constituted by a thick part 5 that becomes thicker toward the tip side, It can also be constituted by a columnar portion having a circular cross section, like a wing portion 3Hb of a wing material 3H of a wire 1H for interdental cleaning tool shown in 13 (c). When the tip 4 is formed as in the interdental cleaning tool wire 1F, insertion between the teeth can be improved, and the thick part 5 and the columnar part 6 are formed as in the interdental cleaning tool wires 1G and 1H. By increasing the scraping effect, the cleaning ability between the teeth can be improved.

  In a preferred embodiment, the maximum width δ of the sheath portion 3a in the cross-sectional direction orthogonal to the length direction of the core material 2 is preferably set to 0.3 to 2.0 mm, and more preferably to 0.5 to 1.4 mm. is there. If comprised in this way, the insertion property between the teeth of the interdental cleaning tool wire 1 is fully securable, preventing peeling of the sheath part 3a.

  It is preferable to set the weight ratio W1 / W2 between the weight W1 of the core material 2 and the weight W2 of the feather material 3 per unit length to 20/80 to 60/40. That is, when the weight ratio W1 / W2 is less than 20/80, the shapeability is low and the strength is low and it is difficult to insert between the teeth, and when it exceeds 60/40, the weight ratio becomes too thick. Therefore, it is difficult to twist and torsion, so 20/80 to 60/40, preferably 25/75 to 40/60 is preferable.

  In this interdental cleaning tool 10, a wire for an interdental cleaning tool comprising a solid core material 2 made of a resin material and a wing material 3 made of a resin material different from the resin material constituting the core material 2. 1. Since the brush part 12 of the interdental cleaning tool 10 is comprised by 1 and a wire strand is not used, generation | occurrence | production of the discomfort by contact with the brush part 12 and a tooth | gear can be prevented, and resin material should be selected appropriately. The interdental cleaning tool 10 that can improve durability and can be used even by a person who is allergic to metal can be realized. Moreover, since the wing | blade part 3b extended to the outward side of the direction orthogonal to the length direction of the core material 2 is formed in the wing | blade material 3, and between teeth can be cleaned by this wing | blade part 3b, cleaning equivalent to an interdental brush is carried out. It becomes possible to ensure the sex. Furthermore, since the core material 2 and the wing material 3 can be simultaneously integrally formed to produce the interdental cleaning tool wire 1, the production cost of the brush portion 12 can be reduced compared to the interdental brush.

Next, the evaluation test of the brush part will be described.
As shown in FIGS. 3 and 4, as the interdental cleaning tool wire 1 constituting the brush portion 12, a core material 2 containing inorganic particles made of barium sulfate with respect to polyethylene terephthalate, and two feathers A wing material 3 made of a polyester elastomer (Hytrel: manufactured by Toray DuPont Co., Ltd.) having a portion 3b is integrally formed. The maximum width α of the core material 2 is 0.5 mm, and the core from the tip of the wing portion 3b is formed. A wire 1 for an interdental cleaning tool having a maximum distance β to the center P of the material 2 of 2.9 mm, a thickness of the wing portion 3b of 0.13 mm, and a maximum length γ of the wing portion 3b of 2.5 mm was manufactured. Then, as shown in FIG. 6, the wings 12A formed in a rectangular shape as shown in FIG. 5A are spaced apart in the length direction at pitches of 0.10 mm, 0.15 mm, and 0.20 mm. Three types of unit brush members 13B in which the brush hairs 12a having the width W of 0.10 mm, 0.15 mm, and 0.20 mm were formed by making the cut 15 by press working were manufactured.

  Of the unit brush members 13B thus manufactured, the unit brush member 13B having the bristle 12a having a width W of 0.10 mm and 0.15 mm has a twist count of 3 per cm centered on the core portion 11. Twist to 5 times, 7 times, 10 times, and then release the hand, then the state of the cylindrical brush portion was photographed. In addition, for the unit brush member 13B having the width W of the bristles 12a of 0.20 mm, twisting is performed so that the number of twists per 1 cm centered on the core wire portion 11 is 3 times, then 7 times. The state of the cylindrical brush portion after releasing the hand was photographed. The results are shown in Table 1.

  Moreover, about the said 10 types of brush parts 12 from which the width W of the bristle 12a and the frequency | count of twist differ, the cleaning area at the time of setting the cleaning area at the time of using the gum soft pick made from Sunstar Co., Ltd. to 100 I asked for each. The result is shown in FIG. The cleaning area was measured by image analysis before and after cleaning using Adobe Photoshop (manufactured by Adobe Systems).

  Furthermore, the wing part 12A in FIG. 5A is formed in a trapezoidal shape, and as shown in FIG. 8B, the length is spaced at a pitch of 0.10 mm by pressing or laser processing. A unit brush member 13BB in which a cut 15 is made and a bristle 12BBa having a width W of 0.10 mm is manufactured, and the number of twists per 1 cm around the core wire portion 11 is 3 times and 7 times. The frustum-shaped brush part was photographed after it was twisted as described above and then released. Table 2 shows a photograph of the frustoconical brush portion and a photograph of the cylindrical brush portion twisted under the same conditions.

  Moreover, about the brush member which has these two types of frustoconical brush parts, the cleaning area when the cleaning area at the time of using the gum soft pick by Sunstar Co., Ltd. was set to 100 was calculated | required, respectively. The result is shown in FIG. It measured by the method similar to the above.

  As shown in Table 1, when the number of twists is in the range of 3 to 7, the brush hair has a beautiful spiral shape, but when it exceeds 10, the brush hair spiral shape is disturbed.

  Moreover, as shown in Table 2, regarding the shape of the brush part, the brush bristles 12a are arranged in a beautiful spiral shape regardless of whether it is formed in a columnar shape or a conical shape, and can be practically used. It can be seen that

  Furthermore, as shown in FIG. 14, with regard to cleanability, even when the number of twists exceeds 10, cleanliness of 2.5 times or more is obtained as compared with a gum soft pick made by Sunstar Co., Ltd. When the width W of the bristles 12a is 0.10 mm and 0.15 mm, it can be seen that good cleanability can be obtained when the number of twists is 3 to 7 times.

  Furthermore, as shown in FIG. 15, with respect to the outer shape of the brush part, it can be seen that the columnar brush part is more cleanable than the frustum-shaped brush part.

  The embodiment of the present invention has been described above. However, the present invention is not limited to the above-described embodiment, and it goes without saying that the configuration can be changed without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 Interdental cleaning tool wire 2 Core material 3 Wing material 3a Sheath part 3b Wing part 4 Tip part 5 Thick part 6 Columnar part 1A Interdental cleaning tool wire 2A Core material 3Aa Sheath part 1B Interdental cleaning tool wire 2B Core material 1C Interdental cleaning tool wire 2C Core material 3Ca Sheath 1D Interdental cleaning tool wire 3D Feather 1E Interdental cleaning tool wire 3E Feather 1F Interdental cleaning tool wire 3F Feather 3Fb Feather 1G Teeth Interlining cleaning wire 3G Feathering 3Gb Feather 1H Interdental cleaning wire 3H Feather 3Hb Feather 10 Interdental cleaning tool 11 Core wire 11a Insertion guide 11b Mounting portion 12 Brush portion 12a Brush bristles 13 Brush member 14 Handle Member 15 Cut 10A Interdental cleaning tool wire 12A Wing 13A Unit brush member 10A Interdental cleaning tool wire 12B Brush part 13B Unit brush member 12BA Brush part 12BAa Brush hair 13BA Unit brush member 12BB Brush portion 12BBa bristles 13BB units brush member 12BC brush portion 12BCa bristles 13BC units brush member 12BD brush portion 12BDa bristles 13BD units brush member 15D cuts 10E interdental cleaner 13E brush member 14E Possession unit

Claims (24)

An interdental cleaning tool comprising a brush member having a brush part for interdental cleaning, and a handle part of the brush member,
The interdental cleaning tool wire constituting the brush member comprises a solid core material made of a resin material and a feather material made of a resin material different from the resin material constituting the core material, The material has a sheath part sheathed on the core material, and at least one wing part extending from the sheath part to the outer side in a direction orthogonal to the length direction of the core material, the core material and the feather material Using a wire for interdental cleaning tools,
An interdental cleaning tool characterized by that.   At a position corresponding to the brush part, a cut or notch is formed in the width direction of the wing part with an interval in the length direction of the wing part, and the wing part is divided into a plurality of brush bristles. The interdental cleaning tool according to claim 1.   The interdental cleaning tool according to claim 2, wherein the wing portion is divided into 50 to 200 brush / cm brush hairs.   The interdental cleaning tool of Claim 2 or 3 which set the width | variety of the said bristle with respect to the length direction of the said wing | blade to 0.05 mm-0.25 mm.   The ratio α / 2β between the maximum width α of the core material and the maximum distance β from the tip of the wing portion to the center of the core material in a cross-sectional direction orthogonal to the length direction of the core material is 0.025. The interdental cleaning tool of any one of Claims 1-4 set to -0.75.   The interdental cleaning tool according to any one of claims 1 to 5, wherein a maximum width α of the core material in a cross-sectional direction orthogonal to the length direction of the core material is set to 0.2 to 1.5 mm.   The maximum distance β from the tip of the wing portion to the center of the core material in a cross-sectional direction orthogonal to the length direction of the core material is set to 1.0 to 4.0 mm. The interdental cleaning tool according to 1.   The maximum distance β from the tip of the wing portion to the center of the core material in a cross-sectional direction orthogonal to the length direction of the core material varies along the length direction of the core material. The interdental cleaning tool according to any one of the above.   The interdental cleaning tool according to any one of claims 1 to 8, wherein a length γ of the wing portion in a cross-sectional direction orthogonal to a length direction of the core member is set to 0.75 to 3.85 mm.   The interdental cleaning tool according to any one of claims 1 to 9, wherein a thickness of the wing portion is set to 0.05 to 0.20 mm.   The interdental cleaning tool of any one of Claims 1-10 which set the maximum width (delta) of the said sheath part to 0.3-2.0 mm in the cross-sectional direction orthogonal to the length direction of the said core material.   The weight ratio W1 / W2 of the weight W1 of the said core material per unit length and the weight W2 of the said feather material was set to 20 / 80-60 / 40 in any one of Claims 1-11. Interdental cleaning tool.   The interdental cleaning tool according to any one of claims 1 to 12, wherein a pair of the wing portions are provided on both sides of the sheath portion.   The cross-sectional shape orthogonal to the length direction of the core material is a circular shape, a shape in which two or more circles or flat circles partially overlap, an ellipse, a polygon, or an indeterminate shape. The interdental cleaning tool according to claim 1.   The interdental cleaning tool of any one of Claims 1-14 by which the said core material is comprised so that plastic deformation is possible.   The interdental cleaning tool according to any one of claims 1 to 15, wherein the interdental cleaning tool wire is twisted around the core material and the wing portion is formed in a spiral shape.   The interdental cleaning tool of Claim 16 which set the frequency | count of the said twist to 10 times / cm or less.   The interdental cleaning tool of any one of Claims 1-17 which formed the external shape of the said brush part in the column shape, the substantially truncated cone shape, or the substantially barrel shape.   The brush member and the handle portion are configured as separate members, and the attachment portion to the handle portion of the brush member is configured with a core material and a sheath portion of the interdental cleaning tool wire. The interdental cleaning tool according to any one of the above.   The interdental cleaning tool of any one of Claims 1-18 which comprised the said brush member and the handle part with the said interdental cleaning tool wire.   The interdental cleaning tool according to any one of claims 1 to 20, wherein the feather material is made of a thermoplastic elastomer, polyester, polyamide, or polyolefin resin. A method for producing an interdental cleaning tool comprising a brush member having a brush part for interdental cleaning, and a handle part of the brush member,
Using a different resin material, a solid core material, a wing material provided integrally with the core material, a sheath part sheathed on the core material, and a length direction of the core material from the sheath part A wire material manufacturing step of simultaneously forming a feather material having at least one wing portion extending outward in a direction orthogonal to the wire, and manufacturing at least the interdental cleaning tool wire material constituting the brush member. The
The manufacturing method of the interdental cleaning tool characterized by the above-mentioned.   A plurality of the wings are formed by forming notches or notches in the width direction of the wings at intervals corresponding to the length of the wings at positions corresponding to the brushes in the interdental cleaning tool wire. The manufacturing method of the interdental cleaning tool of Claim 22 provided with the bristle formation process divided | segmented into a brush hair of a book.   The wire for an interdental cleaning tool in which the plurality of brush bristles are formed is twisted a certain number of times around the core material, and the plurality of brush bristles are arranged in a spiral shape around the core material And the manufacturing method of the interdental cleaning tool of Claim 23 provided with the brush part formation process which forms a brush part.