JP2017086775A - Interdental cleaner group - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an interdental cleaner group capable of improving a degree of freedom in design of a mold.SOLUTION: A interdental cleaner group (1) includes a plurality of interdental cleaners (2) connected to each other. Each interdental cleaner (2) comprises a base part (10) including a base end part (20b) and a distal end part (20a), a shaft part (60), and a cleaning part (70). The base parts (10) are connected to each other so that a boundary between the base part (10) and the shaft part (60) in an interdental cleaner (2) located on one side of a specific interdental cleaner (2) in a width direction is located at a position deviated from a boundary between the base part (10) and the shaft part (60) of the specific interdental cleaner (2) to the opposite side of the base end part (20b) of the base part (10) in a specific direction with the boundary as a reference.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an interdental cleaning tool group including a plurality of interdental cleaning tools.

  Conventionally, an interdental cleaning tool group including a plurality of interdental cleaning tools connected to each other is known. For example, Patent Document 1 discloses an interdental cleaning tool group in which each interdental cleaning tool is particularly suitable for cleaning between back teeth. Specifically, each interdental cleaning tool has a base that has a shape extending along a specific direction, and a shape that extends from the tip of the base along the direction intersecting the base and can be inserted between the teeth. And a cleaning part that covers the shaft part and that can clean between teeth. In the interdental cleaning tool group, the bases are connected to each other so that the interdental cleaning tools are arranged along a width direction orthogonal to the specific direction.

Design Registration No. 1416907

  The interdental cleaning tool group as described in Patent Document 1 is preferably manufactured using a mold in consideration of manufacturing efficiency, but it is difficult to design the mold. Specifically, in the interdental cleaning tool group, since the dimension between the cleaning parts of the adjacent interdental cleaning tools is small, when manufacturing this interdental cleaning tool group with a mold, each cleaning of the mold The thickness of the partition wall that partitions the part forming parts (parts for forming the cleaning part) (dimension in the direction connecting the cleaning part forming parts adjacent to each other) is reduced. Therefore, since the partition wall may be damaged, it is difficult to design the partition wall or its periphery.

  Moreover, when such an interdental cleaning tool group is accommodated in a packaging container, a plurality of interdental cleaning tool groups are overlapped in a depth direction perpendicular to both the specific direction and the width direction in one accommodation space. May be housed. In such a case, when the interdental cleaning tool group disposed on the front side is taken out, the interdental cleaning tool group is usually taken out with a grip portion. Then, an interdental cleaning called a so-called L-shape or a curve-type having a shaft portion extending from the tip portion of the base portion in a direction intersecting the base portion and having a shape that can be inserted between teeth. In the case of a tool, the cleaning part of the interdental cleaning tool group arranged on the front side is displaced while keeping in contact with the cleaning part of the interdental cleaning tool group arranged on the back side, and the interdental cleaning arranged on the back side There is also a problem that it becomes difficult to take out the interdental cleaning tool group arranged on the front side between the cleaning parts of the tool group or the further back side of the cleaning part and being caught between the cleaning parts.

  An object of the present invention is to provide an interdental cleaning tool group that can achieve at least one of improvement in the degree of freedom in designing a mold and smooth removal from a packaging container.

  In order to solve the above problem, it is considered to increase the dimension between the adjacent cleaning parts (thickness of the partition wall) by reducing the angle formed between the base part and the shaft part of each interdental cleaning tool. It is done. However, if it does so, since the direction of the cleaning part with respect to the base in the state where the interdental cleaning tool is inserted in the oral cavity and the direction between the teeth of the back teeth are greatly different, the cleaning performance between the teeth is deteriorated. That is, it is difficult to achieve both the setting of the angle formed by the base portion and the shaft portion to an angle suitable for cleaning between the back teeth and the increase in the degree of freedom in designing the mold.

  Therefore, the present invention is an interdental cleaning tool group including a plurality of interdental cleaning tools connected to each other, and each interdental cleaning tool has a shape extending along a specific direction and one side of the specific direction. A base portion including a base end portion which is an end portion of the base portion and a tip end portion which is an end portion on the other side in the specific direction, and extends from the front end portion of the base portion along a direction intersecting the base portion and is inserted between teeth. And a cleaning part that covers the shaft part and that can clean between teeth, and is provided on one side of a specific interdental cleaning tool in the width direction orthogonal to the specific direction. The boundary between the base portion and the shaft portion in the located interdental cleaning tool is the base end of the base portion in the specific direction with respect to the boundary from the boundary between the base portion and the shaft portion in the specific interdental cleaning tool. So that the position is biased to the opposite side Each base are connected to each other, to provide interdental cleaner group.

  In this interdental cleaning tool group, the boundary between the base part and the shaft part of the interdental cleaning tool located on one side of the specific interdental cleaning tool is specified from the boundary between the base part and the shaft part of the specific interdental cleaning tool. Since it is biased in the direction, the dimension between the cleaning parts of the adjacent interdental cleaning tools is ensured. Therefore, when manufacturing this interdental cleaning tool group with a metal mold | die, the thickness of the partition wall which partitions off between the parts for forming each cleaning part among the said metal mold | die can be enlarged. Therefore, it is possible to increase the degree of freedom in designing the mold used for manufacturing the interdental cleaning tool group while setting the angle formed by the base and the shaft to a range suitable for cleaning between the back teeth. It becomes.

  Further, when the interdental cleaning tool group as described above is accommodated in a packaging container, a plurality of interdental cleaning tool groups are stacked in a depth direction perpendicular to both the specific direction and the width direction in one accommodation space. May be housed. In such a case, when the interdental cleaning tool group disposed on the front side is taken out, the interdental cleaning tool group is usually taken out with a grip portion. Then, an interdental cleaning called a so-called L-shape or a curve-type having a shaft portion extending from the tip portion of the base portion in a direction intersecting the base portion and having a shape that can be inserted between teeth. In the case of a tool, the cleaning part of the interdental cleaning tool group arranged on the front side is displaced while keeping in contact with the cleaning part of the interdental cleaning tool group arranged on the back side, and the interdental cleaning arranged on the back side There is a problem that it becomes difficult to take out the interdental cleaning tool group arranged on the front side between the cleaning parts of the tool group or the further back side of the cleaning part and being caught between the cleaning parts. Such a problem is particularly noticeable when the cleaning part is formed of a material that is not slippery (such as a relatively large coefficient of friction) such as an elastomer, and the cleaning part has brush hairs formed of the same material. It becomes even more noticeable when there is. However, in this interdental cleaning tool group, since the dimension between cleaning parts is ensured, the interdental cleaning tool group can be taken out smoothly. This is because the cleaning part of the interdental cleaning tool group arranged on the back side can be seen from between the cleaning parts of the interdental cleaning tool group arranged on the near side (of the interdental cleaning tool group arranged on the back side). The same applies to the case where each cleaning unit and each cleaning unit of the interdental cleaning tool group arranged on the near side do not overlap in the depth direction).

  In this case, the base portion includes a grip portion having a shape that includes the base end portion of the base portion and can be gripped by a finger, and a tip portion of the base portion between the grip portion and the shaft portion. The gripping portions adjacent to each other in the width direction are connected to each other, and the dimension of the gripping portion in the width direction is greater than the size of the coupling portion in the width direction. Larger is preferred.

  In this way, since the dimension between the cleaning parts adjacent to each other becomes larger, both the design freedom of the angle formed by the base part and the shaft part and the design freedom of the mold are further improved. Further, when a plurality of interdental cleaning tool groups are accommodated in a single packaging container, when taking out the interdental cleaning tool group arranged on the front side, the interdental cleaning tool arranged on the back side It is possible to further prevent the group from being caught with the cleaning unit.

  In the present invention, the base end portion of each base portion is inclined with respect to the specific direction so as to be aligned along a straight line parallel to a straight line connecting the boundaries between the base portion and the shaft portion of each interdental cleaning tool. It is preferable that it has the shape to do.

  If it does in this way, the enlargement of a metal mold | die and the enlargement of the accommodating part which accommodates the said interdental cleaning tool group can be avoided.

  In this case, it is preferable that the dimension in the depth direction of the grip portion is larger than the dimension in the depth direction of the boundary between the base portion and the shaft portion or a portion in the vicinity thereof.

  If it does in this way, when the said interdental cleaning tool is set | placed on a desk etc., for example, it will become difficult for a cleaning part to contact a desk directly, and a cleaning part can be kept clean. In addition, when a plurality of interdental cleaning tool groups are accommodated in a packaging container, the interdental cleaning tool group disposed on the near side and the cleaning unit of the interdental cleaning tool group disposed on the back side Therefore, when the front interdental cleaning tool group is taken out, the cleaning parts can be further prevented from being caught.

  As described above, according to the present invention, it is possible to provide an interdental cleaning tool group capable of improving the degree of freedom in designing a mold. Moreover, when a several interdental cleaning tool group is accommodated in a packaging container, it becomes easy to take out an interdental cleaning tool group.

It is a front view of the interdental cleaning tool group of one Embodiment of this invention. It is a front view of an interdental cleaning tool. It is a right view of the interdental cleaning tool shown in FIG. It is a left view of the interdental cleaning tool shown in FIG. It is sectional drawing in the VV line of FIG. It is a figure which shows the state which the deformation | transformation part deform | transformed. It is a front view which shows the modification of a deformation | transformation part. It is a front view which shows the modification of a deformation | transformation part.

  An interdental cleaning tool group 1 according to an embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the interdental cleaning tool group 1 includes a plurality of interdental cleaning tools 2 connected to each other. Hereinafter, each interdental cleaning tool 2 and the interdental cleaning tool group 1 will be described in this order. Each interdental cleaning tool 2 includes a base portion 10, a shaft portion 60, and a cleaning portion 70.

  The base portion 10 has a shape extending along a specific direction (vertical direction in FIG. 2), and a base end portion 20b that is an end portion on one side (the lower side in FIG. 2) of the specific direction and the other side in the specific direction. The tip part 20a which is an edge part of the side (upper side in FIG. 2) is included. Details of the base 10 will be described later.

  The shaft portion 60 has a shape that extends from the distal end portion 20a of the base portion 10 along the direction intersecting with the extending direction of the base portion 10 and can be inserted between the teeth. Note that the extending direction of the base 10 means a direction parallel to a central axis C of the gripping part 20 described later or a direction in which the connecting part 30 extends. The shaft portion 60 has a substantially cylindrical shape. More specifically, the shaft portion 60 is formed in a shape in which the outer diameter of the shaft portion 60 gradually and slightly decreases from the base end portion toward the tip end portion. The shaft portion 60 is formed integrally with the base portion 10.

  The cleaning unit 70 covers the shaft unit 60 and can clean between the teeth. The cleaning unit 70 is made of an elastomer having a hardness lower than that of the base 10. In this embodiment, a styrene elastomer is used as the elastomer. However, silicon, an olefin elastomer, a polyester elastomer, or the like may be used as the elastomer. The cleaning unit 70 includes a cleaning unit main body 72 having a shape that covers the outer peripheral surface of the shaft unit 60, and a plurality of brush bristles 74.

  The cleaning unit main body 72 has a cylindrical outer peripheral surface. The thickness of the cleaning portion main body 72 is set smaller than the diameter of the shaft portion 60.

  Each brush bristle 74 is formed integrally with the cleaning unit main body 72 from the same material as the cleaning unit main body 72. Each brush hair 74 protrudes outward in the direction orthogonal to the axial direction of the shaft portion 60 from the outer peripheral surface of the cleaning portion main body 72 and gradually increases as the distance from the outer peripheral surface of the cleaning portion main body 72 increases. It has a shape with a small outer shape. In this embodiment, each bristle 74 is formed in a conical shape.

  Next, the base 10 will be described in detail. The base portion 10 includes a grip portion 20 including a base end portion 20b and a connecting portion 30 including a distal end portion 20a. The base 10 is preferably formed of a synthetic resin such as polypropylene, ABS, polybutylene terephthalate, polycarbonate, polyethylene terephthalate, polystyrene, polyacetal or the like. In the present embodiment, the base 10 is made of polypropylene. The shaft portion 60 is also formed of the same synthetic resin as the base portion 10.

  The grip 20 has a shape that can be gripped with a finger. The grip 20 includes a ventral edge 21 formed on one side (left side in FIG. 2) of the width direction (left and right direction in FIG. 2) perpendicular to the specific direction, and an edge on the other side in the width direction. And a back side edge portion 22 formed on the back side. The ventral side edge portion 21 and the back side edge portion 22 each have a shape extending linearly along a specific direction. The dimension of the grip part 20 in the specific direction is set larger than the dimension of the grip part 20 in the width direction (the dimension between the ventral edge 21 and the back edge 22). Further, the dimension in the width direction of the grip portion 20 is set larger than that of the connecting portion 30.

  The connecting part 30 connects the grip part 20 and the shaft part 60. Specifically, the connecting portion 30 includes a support portion 32 that includes the distal end portion 20 a of the base portion 10 and supports the shaft portion 60, and a deformable portion 34 that is interposed between the support portion 32 and the grip portion 20. As shown in FIG. 3 and FIG. 4, the dimension of the grip portion 20 in the depth direction (the direction orthogonal to both the specific direction and the width direction) is the depth of the boundary between the base portion 10 and the shaft portion 60 or the vicinity thereof. Greater than dimension in direction.

  The deformable portion 34 is elastically deformable so as to allow the support portion 32 to be displaced in the width direction with respect to the grip portion 20. The rigidity of the deforming portion 34 is set smaller than the rigidity of the support portion 32. In the deformable portion 34, the support portion 32 is located between the shaft portion 60 and the central axis C of the grasping portion 20 (a vertical bisector of a line segment connecting the ventral edge 21 and the back edge 22). As described above, the support portion 32 and the grip portion 20 are interposed. In the present embodiment, the deforming part 34 has a ventral side deforming part 40 and a dorsal side deforming part 50.

  The ventral-side deformable portion 40 includes a portion closer to the shaft portion 60 (left side in FIG. 2) than the central axis C of the grip portion 20 in the width direction of the grip portion 20 and the width direction of the support portion 32. It is interposed between the central part of the support part 32 and the part closer to the shaft part 60. The ventral side deformable portion 40 includes a ventral side base portion 42 and a ventral side deformable portion main body 44.

  The ventral base portion 42 is connected to the grip portion 20. The ventral base portion 42 has a shape that gradually decreases in size in the width direction as it separates from the grip portion 20 and curves so as to separate from the central axis C of the grip portion 20.

  The ventral deforming portion main body 44 is interposed between the ventral base portion 42 and the support portion 32 and has a shape extending linearly along a specific direction. The dimension in the width direction of the ventral side deformable part main body 44 is set to be smaller than the dimension in the width direction of the ventral side base part 42. For this reason, as shown in FIG. 6, when an external force is applied to the support portion 32 such that the support portion 32 is displaced in the width direction with respect to the grip portion 20, the ventral base portion 42 and the ventral deformable portion main body. The ventral side deformable portion 40 is elastically deformed so as to be bent at the boundary with 44. That is, the boundary between the ventral base portion 42 and the ventral deformable portion main body 44 constitutes the “abdominal bent portion 40a”. In the present embodiment, as shown in FIG. 5, the ventral side deformable portion main body 44 is formed in a columnar shape.

  The back side deformation | transformation part 50 is located on the opposite side to the axial part 60 on the basis of the ventral side deformation part 40 about the width direction, and is spaced apart from the ventral side deformation part 40 about the width direction. The dorsal deforming portion 50 includes a portion on the side farther from the shaft portion 60 than the central axis C of the gripping portion 20 in the width direction of the gripping portion 20 (on the right side in FIG. 2) and the width direction of the support portion 32. It is interposed between the central portion of the support portion 32 and the portion farther from the shaft portion 60. The back side deformation part 50 has a back side base part 52 and a back side deformation part main body 54.

  The dorsal base portion 52 is connected to the grip portion 20. The dorsal base portion 52 has a shape in which the dimension in the width direction gradually decreases as the distance from the grip portion 20 increases. The dorsal base portion 52 has a shape that curves so as to be convex toward the ventral base portion 42.

  The back side deformable portion main body 54 is interposed between the back side base portion 52 and the support portion 32 and has a shape extending linearly along a specific direction. The dimension in the width direction of the back side deformable part main body 54 is set to be smaller than the dimension in the width direction of the back side base part 52. For this reason, as shown in FIG. 6, when an external force is applied to the support portion 32 so that the support portion 32 is displaced in the width direction with respect to the gripping portion 20, the dorsal base portion 52 and the dorsal deformation portion. The dorsal deforming portion 50 is elastically deformed so as to be bent at the boundary with the main body 54. That is, the boundary between the dorsal base portion 52 and the dorsal deformable portion main body 54 constitutes the “dorsal bent portion 50a”. The dorsal bent portion 50a is formed in a portion of the dorsal deformable portion 50 that is closer to the support portion 32 than a portion that overlaps the ventral bent portion 40a in the width direction. In other words, the distance from the support part 32 to the ventral side bent part 40a is set longer than the distance from the support part 32 to the back side bent part 50a. In the present embodiment, as shown in FIG. 5, the back side deformable portion main body 54 is formed in a quadrangular prism shape. The dimension W2 in the width direction of the dorsal deformable body 54 is set smaller than the dimension W1 in the width direction of the ventral deformable body 44. In addition, the dimension D2 of the dorsal deformation main body 54 in the depth direction (vertical direction in FIG. 5) is set larger than the dimension D1 of the ventral deformation main body 44 in the same direction.

  Then, the interdental cleaning tool group 1 containing the interdental cleaning tool 2 demonstrated above is demonstrated. The interdental cleaning tool group 1 has a plurality (eight in this embodiment) of interdental cleaning tools 2 connected to each other. As shown in FIG. 1, in the interdental cleaning tool group 1, each interdental cleaning tool 2 is in a state where the boundary between the base portion 10 and the shaft portion 60 of the adjacent interdental cleaning tool 2 is biased in a specific direction. Are connected to each other. Specifically, the boundary between the base 10 and the shaft portion 60 in the interdental cleaning tool 2 located on one side (for example, the right side) of the specific interdental cleaning tool 2 in the width direction is the base in the specific interdental cleaning tool 2. The dorsal side edge of each gripping part 20 is located at a position deviated by a predetermined dimension L in the opposite direction from the base end part 20b of the base part 10 with respect to the specific direction from the boundary between the base part 10 and the shaft part 60. 22 and the ventral edge 21 are connected to each other.

  Moreover, the base end part 20b of each base 10 of the interdental cleaning tool group 1 is specified so as to be aligned along a straight line parallel to a straight line connecting the boundaries between the base 10 and the shaft part 60 of each interdental cleaning tool 2. It has a shape that is inclined with respect to the direction.

  In this embodiment, the interdental cleaning tool group 1 is manufactured by a mold. Specifically, first, a synthetic resin (this embodiment) for forming the base portion 10 and the shaft portion 60 in a first mold having a space in which the base portion 10 and the shaft portion 60 of each interdental cleaning tool 2 can be formed. In the form, polypropylene) is filled. Thereafter, the cleaning unit 70 is placed in the second mold in a state where the molded product (the base 10 and the shaft part 60) by the first mold is placed in the second mold having a space in which the cleaning unit 70 can be formed. An elastomer to be formed (in this embodiment, a styrene elastomer) is filled. The 2nd metal mold | die has a partition wall which partitions off the site | parts for forming each cleaning part 70. FIG.

  Here, in the interdental cleaning tool group 1, the boundary between the base portion 10 and the shaft portion 60 of the interdental cleaning tool 2 located on one side of the specific interdental cleaning tool 2 is the specific interdental cleaning tool 2. Since it deviates in a specific direction from the boundary between the base portion 10 and the shaft portion 60, the dimension between the cleaning portions 70 of the adjacent interdental cleaning tools 2 is ensured. Therefore, the thickness of the partition wall of the second mold can be increased. Therefore, it is possible to increase the degree of freedom in designing the second mold while setting the angle formed by the base portion 10 and the shaft portion 60 within a range suitable for cleaning between the back teeth.

  Moreover, in this embodiment, since the dimension between the cleaning parts 70 is ensured, even if it is a case where the several interdental cleaning tool group 1 is accommodated in the packaging container so that it may overlap in the depth direction, the near side It can prevent that the cleaning part 70 of the interdental cleaning tool group 1 arrange | positioned in enters further into the back | inner side of the cleaning part 70 of the interdental cleaning tool group 1 arrange | positioned in the back | inner side, and is caught.

  Moreover, since the dimension in the width direction of the grip part 20 is set larger than the dimension in the width direction of the connecting part 30, the dimension between the cleaning parts 70 adjacent to each other becomes larger. Therefore, both the design freedom of the angle formed by the base portion 10 and the shaft portion 60 and the design freedom of the mold are further improved.

  When a plurality of interdental cleaning tool groups 1 are accommodated in a depth direction in a single packaging container, when the interdental cleaning tool group 1 placed on the near side is taken out, it is placed on the near side. It can prevent more that each cleaning part 70 of the interdental cleaning tool group 1 to be caught with each cleaning part 70 of the interdental cleaning tool group 1 arrange | positioned in the back | inner side.

  Further, the base end portion 20b of each base portion 10 is inclined with respect to a specific direction so as to be aligned along a straight line parallel to a straight line connecting the boundaries between the base portion 10 and the shaft portion 60 of each interdental cleaning tool 2. Therefore, it is possible to avoid an increase in the size of the mold and an increase in the size of the accommodating part such as a packaging container that accommodates the interdental cleaning tool group 1.

  Moreover, since the dimension of the grip part 20 in the depth direction is larger than the dimension of the shaft part 60 in the depth direction, when the plurality of interdental cleaning tool groups 1 are accommodated in the depth direction in the packaging container, the front side A distance can be ensured between each cleaning part 70 of the interdental cleaning tool group 1 arranged at the position and the cleaning part 70 of the interdental cleaning tool group 1 arranged on the back side. For this reason, when taking out the front interdental cleaning tool group 1, it can prevent more reliably that the cleaning parts 70 of each interdental cleaning tool group 1 are caught. From such a viewpoint, it is preferable that the thickness (dimension in the depth direction) of the grip portion 20 is larger than the thickness (diameter) of the cleaning portion main body 72, and the thickness of the cleaning portion main body 72 and the thickness of the support portion 32 (depth). More preferably, it is larger than both of the dimensions in the direction.

  Next, the operation of cleaning the interdental space between the back teeth with the interdental cleaning tool 2 described above will be described.

  First, one (for example, end) interdental cleaning tool 2 is removed from the interdental cleaning tool group 1, and the interdental cleaning is performed from the front tooth side toward the back tooth side with the cleaning portion 70 of the interdental cleaning tool 2 as the head. Tool 2 is inserted into the oral cavity. And the holding part 20 is operated so that the cleaning part 70 reciprocates along between back teeth.

  Here, during the cleaning between the teeth, an external force in a direction intersecting the reciprocating direction of the gripping part 20 (cleaning part 70), particularly a pulling force in a direction in which the interdental cleaning tool 2 is pulled out from the oral cavity is applied to the gripping part 20. May join. In this embodiment, even in this case, the breakage of the boundary between the shaft portion 60 and the support portion 32 or the vicinity thereof is suppressed. Specifically, in the interdental cleaning tool 2, since the rigidity of the deformable portion 34 is smaller than the rigidity of the support portion 32, the external force (for example, pulling force) is applied to the gripping portion 20 during the cleaning between the teeth. In this case, as shown in FIG. 6, the deforming portion 34 is elastically deformed so that the support portion 32 is displaced in the width direction with respect to the grip portion 20. In other words, when the external force is applied to the grip portion 20, the shaft portion 60 bends such that the tip of the shaft portion 60 is displaced in a direction intersecting the axial direction of the shaft portion 60 with respect to the support portion 32. The deformation portion 34 absorbs a part of the stress generated at the boundary between the shaft portion 60 and the support portion 32 or a portion in the vicinity thereof as strain energy. Therefore, since the stress which arises in the boundary part of the axial part 60 and the support part 32 or the site | part of the vicinity is reduced, the damage of the said site | part is suppressed.

  Moreover, since the deformation | transformation part 34 has the abdominal side deformation | transformation part 40 and the back side deformation | transformation part 50 which mutually space apart in the width direction, the deformation | transformation part 34 which has small rigidity can be obtained easily. Specifically, since the abdominal deformation part 40 and the back deformation part 50 form a space between each other, the rigidity of the deformation part 34 is reduced.

  In addition, since the dimension W2 in the width direction of the dorsal deforming part 50 is smaller than the dimension W1 in the width direction of the ventral deforming part 40, the boundary between the shaft part 60 and the support part 32 or the vicinity thereof during cleaning between teeth. The damage of the part is more reliably suppressed. Specifically, especially during the cleaning between the back teeth, the pulling force is often applied to the grip portion 20, and in this case, the support portion 32 is connected to the ventral deformation portion 40 via the shaft portion 60. An external force in the direction toward the dorsal deforming portion 50 acts. Therefore, since the dimension W2 in the width direction of the dorsal deformation part 50 is smaller than the dimension W1 in the width direction of the ventral deformation part 40, the support part 32 deforms from the ventral deformation part 40 to the dorsal deformation with respect to the grip part 20. It becomes easy to be displaced in the direction toward the portion 50. Therefore, breakage of the boundary between the shaft portion 60 and the support portion 32 or a portion in the vicinity thereof is more reliably suppressed.

  Furthermore, since the dimension D2 in the depth direction of the dorsal deforming portion 50 is larger than the dimension D1 in the depth direction of the ventral deforming portion 40, the ease of displacement of the support portion 32 in the width direction with respect to the grip portion 20 is ensured. However, it is possible to suppress damage to the dorsal deformable portion 50 when an external force is applied to the support portion 32 that is displaced in the depth direction with respect to the grip portion 20.

  Further, since the ventral side bent portion 40a and the back side bent portion 50a are separated from each other in a specific direction, an external force acts on the support portion 32 so that the support portion 32 is displaced in the width direction with respect to the grip portion 20. The deformation (breaking) of the deforming portion 34 when it is done is suppressed. Specifically, when the ventral side bent portion 40a and the back side bent portion 50a are formed at positions overlapping in the width direction without being separated from each other in a specific direction, the bent portion deforms when the external force is applied. Although the portion 34 is easily broken, the abdomen bent portion 40a and the dorsal bent portion 50a are separated from each other in a specific direction, so that the deformation portion 34 is prevented from being damaged when the external force is applied.

  Further, the distance from the support portion 32 to the ventral side bent portion 40a is longer than the distance from the support portion 32 to the back side bent portion 50a. For this reason, when the pulling force is applied to the grip portion 20, the support portion 32 is easily displaced in the direction from the ventral deformation portion 40 toward the dorsal deformation portion 50, so that the shaft portion 60 and the support portion 32 The breakage of the boundary or the vicinity thereof is further reliably suppressed. Specifically, when the pulling force is applied, the support portion 32 moves in the direction from the ventral-side deformable portion 40 toward the dorsal-side deformable portion 50 with respect to the grasping portion 20 (the direction toward the central axis C of the grasping portion 20). When the deforming portions 40 and 50 are displaced so as to be displaced, a part of the stress generated at the boundary between the shaft portion 60 and the support portion 32 or a portion in the vicinity thereof is absorbed by the deforming portion 34. From the amount of displacement of the dorsal deforming portion 50 necessary for the portion 32 to be displaced by a specific distance along the direction from the ventral deforming portion 40 toward the dorsal deforming portion 50 (the direction toward the central axis C of the gripping portion 20). However, the ventral deforming portion 40 is larger. In the interdental cleaning tool 2, the distance from the support part 32 to the abdominal bending part 40 a is longer than the distance from the support part 32 to the dorsal bending part 50 a, so that the displacement amount of the dorsal deformation part 50 is larger. It is easy to ensure a large amount of displacement of the ventral side deformable portion 40. Therefore, a part of the stress acting on the boundary between the shaft portion 60 and the support portion 32 or a portion in the vicinity thereof is easily absorbed.

  In addition, it should be thought that the said embodiment disclosed this time is an illustration and restrictive at no points. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and further includes all modifications within the meaning and scope equivalent to the scope of claims for patent.

  The structure of the deformation | transformation part 34 is not restricted to said example. For example, the deformable portion 34 has a portion that fills between the ventral deformable portion 40 and the dorsal deformable portion 50, and the entire deformable portion 34 including the portion has a hardness lower than the hardness of the support portion 32. (Elastomer etc.) may be used. Even in this case, the rigidity of the deformable portion 34 can be made smaller than the rigidity of the support portion 32.

  Moreover, FIG. 7 has shown the modification of the interdental cleaning tool 2 of the said embodiment. In this interdental cleaning tool 3, the abdominal deformable portion 40 and the dorsal base portion 52 are formed of a synthetic resin such as polypropylene, and the cleaning portion 70, the dorsal deformable portion main body 54, the cleaning portion 70, and the dorsal deformable portion main body 54. Are formed of an elastomer or the like having a lower hardness than the synthetic resin. Also in this case, the boundary between the dorsal base portion 52 and the dorsal deformable portion main body 54 constitutes the dorsal bent portion 50a. Further, the distance from the support portion 32 to the ventral side bent portion 40a is set longer than the distance from the support portion 32 to the back side bent portion 50a. Even in this interdental cleaning tool 3, when the pulling force is applied to the gripping part 20, the deformation parts 40, 50 are effectively elastically deformed so as to be bent at the respective bending parts 40a, 50a. Part of the stress generated at the boundary between the portion 60 and the support portion 32 or at the vicinity thereof is absorbed.

  Moreover, FIG. 8 has shown another modification of the interdental cleaning tool 2 of the said embodiment. In the interdental cleaning tool 4, a cutout is formed in each of the abdominal deformable portion 40 and the dorsal deformable portion 50. In this case, the notches constitute the bent portions 40a and 50a. Also in this case, the distance from the support part 32 to the abdominal bending part 40a is set longer than the distance from the support part 32 to the back bending part 50a. Even in this aspect, the same effect as described above can be obtained.

  Further, the shaft portion 60 is not limited to intersecting the extending direction of the connecting portion 30. For example, the shaft portion 60 intersects the extending direction of the gripping portion 20 and has a shape that curves so that the connecting portion 30 is convex in the direction from the ventral deforming portion 40 toward the dorsal deforming portion 50. May be.

DESCRIPTION OF SYMBOLS 1 Interdental cleaning tool group 2 Interdental cleaning tool 10 Base 20 Grasping part 20a Tip part 20b Base end part 30 Connection part 32 Support part 34 Deformation part 40 Abdominal side deformation part 40a Abdominal side bending part 42 Abdominal side base part 44 Abdominal side Deformation part main body 50 Back side deformation part 50a Back side bending part 52 Back side base part 54 Back side deformation part main body 60 Shaft part 70 Cleaning part

Claims (3)

A group of interdental cleaning tools including a plurality of interdental cleaning tools connected to each other,
Each interdental cleaning tool
A base portion having a shape extending along a specific direction and including a base end portion that is an end portion on one side of the specific direction and a tip end portion that is an end portion on the other side of the specific direction;
A shaft portion having a shape that extends from the tip portion of the base portion along the direction intersecting the base portion and can be inserted between teeth,
A cleaning part that covers the shaft part and that can clean between teeth;
The boundary between the base and the shaft in the interdental cleaning tool located on one side of the specific interdental cleaning tool in the width direction orthogonal to the specific direction is the base and the shaft in the specific interdental cleaning tool. An interdental cleaning tool group in which the bases are connected to each other so as to be in a position deviated from the boundary to the base to the side opposite to the base end of the base in the specific direction with respect to the boundary. In the interdental cleaning tool group according to claim 1,
The base is
A gripping portion having a shape that includes a base end portion of the base portion and can be gripped with a finger;
Including the distal end portion of the base portion and the connecting portion interposed between the grip portion and the shaft portion;
The grip portions adjacent to each other in the width direction are connected,
The interdental cleaning tool group, wherein the dimension of the grip part in the width direction is larger than the dimension of the connection part in the width direction. In the interdental cleaning tool group according to claim 1 or 2,
The base end portion of each base portion has a shape inclined with respect to the specific direction so as to be aligned along a straight line parallel to a straight line connecting the boundaries between the base portion and the shaft portion of each interdental cleaning tool. Interdental cleaning tool group.

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