CN221845058U

CN221845058U - Interdental brush set

Info

Publication number: CN221845058U
Application number: CN202323501355.2U
Authority: CN
Inventors: 上野响; 木本雄也; 林田咲穗; 冈本司
Original assignee: Lion Corp
Current assignee: Lion Corp
Priority date: 2022-12-28
Filing date: 2023-12-21
Publication date: 2024-10-18
Anticipated expiration: 2033-12-21
Also published as: JP2024095525A

Abstract

The present utility model provides a interdental brush group which can ensure the intensity of vibration and can easily cut the interdental brushes from each other only when the cutting operation is performed in a specific operation. A toothbrush set is characterized in that a plurality of interdental brushes are arranged in parallel in the longitudinal direction, a connecting part is arranged in a gap between adjacent interdental brushes, the holding part is provided with at least 1 bending part when the toothbrush set is overlooked, the plurality of connecting parts protrude from a base end connected with the holding part of any interdental brush, the plurality of connecting parts are connected with other arbitrary interdental brushes adjacent to any interdental brush at the top end and are integrally arranged with the holding part, at least one of the plurality of connecting parts is arranged at the bending part, the plurality of connecting parts respectively have different shapes, and the maximum areas of the plurality of connecting parts in the width direction of the interdental brush are different.

Description

Interdental brush set

Technical Field

The present utility model relates to interdental brush sets. The present utility model claims priority based on japanese patent application No. 2022-211912 of the utility model in japan at 12 months of 2022 and japanese patent application No. 2023-179093 of the utility model in 10 months of 2023, the contents of which are incorporated herein by reference.

Background

The interdental brush is used as an auxiliary cleaning tool for cleaning interdental spaces which are difficult to clean by a general toothbrush. Among such interdental brushes, there are, for example, an interdental brush using a metal wire as a shaft member, and an interdental brush using a synthetic resin as a shaft member. Generally, a so-called non-wire type interdental brush using a synthetic resin as a shaft member is provided with a connecting portion for connecting adjacent grip portions to each other, and a plurality of interdental brushes are connected in parallel to form an interdental brush group. When the user uses the interdental brush, the plurality of connecting portions need to be separated one by one.

As an interdental brush set in which a plurality of interdental brushes (interdental cleaning tools) using a synthetic resin as a shaft member are connected in parallel as described above, for example, an interdental brush set described in patent document 1 has been proposed.

Prior art literature

Patent literature

Patent document 1: japanese patent laid-open No. 2022-010139

Technical problem to be solved by the utility model

In a general interdental brush set disclosed in patent document 1, a plurality of connecting portions are connected in parallel, and a plurality of connecting portions having the same shape are positioned on the same straight line, so that the holding portions of adjacent interdental brushes are connected to each other. Therefore, in order to separate the connected interdental brushes from each other, a load is applied to a plurality of connection portions at the same time, and thus a greater force is required for separation.

In the interdental brush group of patent document 1, in order to stably connect a plurality of interdental brushes by a plurality of connection portions arranged on the same straight line, it is necessary to secure a certain distance between the connection portions. However, in the case of lengthening the distance between the connecting portions, a larger force is required when the connected interdental brushes are separated from each other.

Further, since the plurality of connecting portions are positioned on the same straight line, the connecting portions may be bent by a simple operation, and thus bending and breaking may occur at an unexpected timing such as during transportation.

On the other hand, for example, there has been proposed an interdental brush set in which slits are provided only in a part of the connecting portions, so that the connecting portions are cut off first when twisting. However, in the case where the slit is provided, there is a problem in that the connecting area of the connecting portion to the grip portion is reduced, and therefore the connecting portion is easily broken by simple operations such as transportation and vibration during manufacturing.

Disclosure of utility model

The present utility model has been made in view of the above-described problems, and an object thereof is to provide a dental brush set capable of ensuring the intensity of vibration during transportation and manufacturing and easily separating the dental brushes connected by a plurality of connecting portions from each other only when the separation operation is performed by a specific operation.

Technical means for solving the technical problems

The present utility model has the following aspects.

< 1 > An interdental brush set having a plurality of interdental brushes and a plurality of connecting portions for connecting adjacent interdental brushes to each other among the plurality of interdental brushes,

The interdental brush has a grip portion made of synthetic resin, and a brush portion having a brush member and provided so as to protrude from the tip of the grip portion,

The plurality of interdental brushes are arranged in parallel in the longitudinal direction, and the connecting portion is provided in the gap between adjacent interdental brushes,

The grip portion has a curvature of at least 1 when the interdental brush set is viewed in plan,

The plurality of connecting parts protrude from the base end which is connected with the holding part of any one of the interdental brushes, are connected with other arbitrary interdental brushes adjacent to the arbitrary interdental brush at the top end, are integrally arranged with the holding part,

At least one of the plurality of connecting portions is disposed at the bending portion,

The plurality of coupling parts have different shapes respectively,

Further, the maximum areas of the plurality of connecting portions in the width direction orthogonal to the longitudinal direction of the interdental brush are different.

The interdental brush set according to < 2 > above < 1 >, wherein the plurality of connecting portions includes at least one connecting portion provided in the curved portion, and at least one connecting portion provided in a grip portion other than the curved portion; when at least one connecting portion disposed in the curved portion is one connecting portion and at least one connecting portion disposed in a grip portion other than the curved portion is the other connecting portion, the protruding dimension of the one connecting portion and the other connecting portion protruding from the grip portion to the adjacent grip portion is different in a plan view of the interdental brush group.

The interdental brush set according to < 3 > above < 2 > is characterized in that, when the interdental brush set is viewed in plan and the extending direction passing through the center of the brush portion is defined as a reference axis, the distal end of the connecting portion is a surface located at the position farthest from the reference axis, and the dimension from the reference axis to the distal end of the one connecting portion in the direction perpendicular to the reference axis is larger than the dimension from the reference axis to the distal end of the other connecting portion.

The interdental brush set according to < 4 > to < 2 > or < 3 > is characterized in that, when the interdental brush set is viewed in plan and the extending direction passing through the center of the brush portion is defined as a reference axis, the base end of the connecting portion is a surface located closest to the reference axis, and the curvature of the grip portion provided with the base end of one connecting portion is different from the curvature of the grip portion provided with the base end of the other connecting portion.

The interdental brush set according to < 5 > to the above <2 > or < 3 > is characterized in that, when the interdental brush set is viewed in plan, the curvature of the grip portion to which the base end of the one coupling portion is connected is different from the curvature of the grip portion to which the base end of the other coupling portion is connected.

The interdental brush set according to < 6 > to < 2 > or < 3 > is characterized in that, when the interdental brush set is viewed in plan, the curvature of the grip portion to which the distal end of the one connecting portion is connected is different from the curvature of the grip portion to which the distal end of the other connecting portion is connected.

The interdental brush set according to < 7 > to < 1 > or < 2 > is characterized in that the base end side of the plurality of connecting portions is a trapezoid portion having a vertical cross-sectional trapezoid shape when the interdental brush set is viewed in plan, and the distal end side is a fracture portion having a shape that gradually decreases toward the distal end side.

ADVANTAGEOUS EFFECTS OF INVENTION

In the interdental brush set according to the present utility model, as described above, at least one of the plurality of connecting portions is arranged in the curved portion of the grip portion, and each of the connecting portions has a different shape, and the maximum areas of the plurality of connecting portions in the width direction orthogonal to the longitudinal direction of the interdental brush are different from each other. This ensures the shape stability of the plurality of interdental brushes in the connected state, prevents the connecting portions from being bent by simple operations such as transportation and manufacturing, and enables the plurality of connecting portions to be sequentially broken one by one only when a specific operation such as an irregular torsional bending operation is performed.

Therefore, the strength against vibration at the time of transportation and manufacture can be ensured, and the plurality of connected interdental brushes can be easily separated from each other without requiring a large force.

Drawings

Fig. 1 is a schematic diagram illustrating an embodiment of the interdental brush set of the present utility model, and is a plan view showing an enlarged main portion of a state in which a plurality of interdental brushes are connected by a plurality of connecting portions.

Fig. 2 is a view schematically illustrating an embodiment of the interdental brush set of the present utility model, and is a top view showing the whole of a plurality of interdental brushes connected by a plurality of connecting portions.

Fig. 3 is a schematic diagram illustrating an embodiment of the interdental brush set according to the present utility model, and is a plan view showing the whole of a plurality of interdental brushes connected by a plurality of connecting portions, and is a diagram illustrating a relationship between a dimension from a reference axis to a tip of one connecting portion and a dimension from the reference axis to a tip of the other connecting portion in an orthogonal direction of the reference axis when the extending direction of the brush portions is defined as the reference axis.

Fig. 4 is a schematic diagram illustrating an embodiment of the interdental brush set according to the present utility model, and is a plan view showing an enlarged main portion of a state in which a plurality of interdental brushes are connected by a plurality of connecting portions, and is a diagram illustrating a curvature of a grip portion to which a base end side and a tip end side of the plurality of connecting portions are connected.

Fig. 5 is a view schematically illustrating an embodiment of the interdental brush set of the present utility model, and is a plan view illustrating the curvature of a grip portion to which the base end sides of a plurality of coupling portions are connected.

Fig. 6 is a schematic diagram illustrating an embodiment of the interdental brush set according to the present utility model, and is a plan view showing an enlarged main portion of a state in which a plurality of interdental brushes are connected by a plurality of connecting portions, and is a diagram illustrating a curvature of a grip portion connected to a distal end side of the plurality of connecting portions.

Fig. 7 is a schematic diagram illustrating an embodiment of the interdental brush set according to the present utility model, and is a plan view showing a shape of a trapezoid portion in which a base end side of a plurality of connecting portions has a vertical cross-sectional trapezoid shape, and a broken portion in which a tip end side has a shape that gradually decreases toward the tip end side.

Symbol description

10 Interdental brush (multiple interdental brushes)

10A one side interdental brush (interdental brush)

10B another interdental brush (interdental brush)

1. 1A, 1B grip

1A front end

1B rear end

1C edge

11 Bending part

12 Straight line portion

13 Extension part

2 Brush part

21 Shaft member

21A root part

22 Brush parts

3 Connecting portion (multiple connecting portions)

3A one-side connecting part

3B other connecting portion

3A base end

3B tip

31 Trapezoid part

32 Breaking part

J reference shaft

100 Interdental brush set

Detailed Description

Hereinafter, embodiments of the interdental brush set according to the present utility model will be described in detail with reference to fig. 1 to 7. In the drawings used in the following description, features may be displayed in an enlarged manner for convenience, and the size ratio and the like may be different from those of the actual drawings for easy understanding of the features. The materials, dimensions, and the like described in the following description are merely examples, and the present utility model is not limited thereto, and may be appropriately modified and implemented within a scope not changing the gist thereof.

Fig. 1 is an enlarged plan view showing a main portion of an interdental brush set 100 according to the present embodiment in a state where a plurality of connecting portions 3 (3A, 3B) are connected in parallel. Fig. 2 is a view showing the whole of the plurality of interdental brushes connected by the plurality of connecting portions. Fig. 3 is an overall plan view illustrating a relationship between a dimension from the reference axis J to the distal end 3B of one connecting portion 3A and a dimension from the reference axis J to the distal end 3B of the other connecting portion 3B in the orthogonal direction of the reference axis J when the extending direction of the brush 2 is defined as the reference axis J. Fig. 4 is a plan view illustrating the curvature of the grip portion 1 to which the base end 3A side and the tip end 3B side of the coupling portions 3A and 3B are connected. Fig. 5 is a plan view illustrating the curvature of the grip portion 1 connected to the base end 3A side of the connecting portions 3A and 3B. Fig. 6 is a plan view illustrating the curvature of the grip portion 1 connected to the distal end 3B side of the connecting portions 3A and 3B. Fig. 7 is a plan view showing a shape of a trapezoid 31 having a vertical cross-sectional trapezoid shape on the base end 3A side of the connecting portions 3A and 3B, and a fracture 32 having a gradually decreasing shape toward the tip end 3B side.

As shown in fig. 1, the interdental brush group 100 of the present embodiment includes a plurality of interdental brushes 10, and a plurality of connecting portions 3 for connecting the adjacent interdental brushes 10. In the interdental brush group 100 according to the present embodiment, the plurality of interdental brushes are arranged in parallel in the longitudinal direction in the same manner, and the connecting portion 3 is provided in the gap between adjacent interdental brushes 10.

The interdental brush 10 and the connecting portion 3 constituting the interdental brush group 100 are described in detail below.

< Interdental brush >)

The user can clean the interdental spaces by inserting the brush part 2 of the interdental brush 10 into the gaps (interdental spaces) between adjacent teeth. As shown in fig. 1, 2, and the like, the interdental brush 10 of the present embodiment is generally configured to include a grip portion 1 made of synthetic resin, and a brush portion 2 having a brush member 22 provided so as to protrude from a distal end 1a of the grip portion 1. Fig. 2 and the like show an example in which the brush section 2 includes a shaft member 21 and a brush member 22 provided to cover the shaft member 21.

In a state where the plurality of interdental brushes 10A and 10B are connected to each other by the connecting portions 3A and 3B in a plan view (hereinafter, may be simply referred to as "plan view"), the extending direction passing through the center of the brush portion 2 is defined as a reference axis J (longitudinal direction) of the interdental brush 10. The direction orthogonal to the reference axis J (longitudinal direction) is referred to as "width direction". In the reference axis J, the direction toward the front end 1a of the grip portion 1 is referred to as "front end side", and the opposite direction is referred to as "rear end side".

[ Grip portion ]

The grip portion 1 is a plate-like member made of a synthetic resin material. The brush 2 is disposed on the distal end 1a side. That is, the shaft member 21 constituting the brush 2 is provided to protrude from the distal end 1a of the grip portion 1.

As shown in fig. 2 and the like, the grip portion 1 has a curved portion 11 at least at 1 in a plan view of the grip portion 1.

In the example shown in fig. 1 and 2, the grip portion 1A (1) of the one interdental brush 10A and the grip portion 1B (1) of the other interdental brush 10B are connected by one connecting portion 3A and the other connecting portion 3B, which will be described in detail later.

The grip portion 1 has: a straight line portion 12 having a length in one direction; a curved portion 11 provided continuously with the straight portion 12; and a extending portion 13 formed to extend from the bending portion 11 and to be gently bent toward the tip end 1a so as to be parallel to the straight portion 12 in the vicinity of the tip end 1 a.

That is, in the grip portion 1, the bent portion 11 is provided between the front end of the straight portion 12 and the rear end of the extension portion 13.

It is preferable that the curvature of the edge of the bent portion 11 is different from the curvature of the edge of the extended portion 13. Preferably, when the edge of the bent portion 11 is bent in a convex shape, the edge of the extension portion 13 is bent in a convex shape in a direction opposite to the bent portion 11. The edge of the curved portion 11 preferably has a smaller curvature than the edge of the extension portion 13.

Preferably, the curved portion 11 is a portion having a curve represented by one curvature at the front end of the straight portion 12. The extension portion 13 is preferably a portion extending from a portion where one curvature of the bent portion 11 changes to the brush portion 2.

The grip portion 1 has the above-described straight portion 12 and the extension portion 13, and the straight portion 12 and the extension portion 13 are connected via the curved portion 11, so that they are formed in a substantially S-shape in plan view. Therefore, the user can easily grasp with his hand and perform a wiping operation.

In the interdental brush group 100 provided with the curved portion 11, the plurality of connecting portions 3A and 3B are more likely to have different shapes than the interdental brush group 100 in which the straight portion 12 and the extension portion 13 are connected without the curved portion 11, as will be described below.

The grip portion 1 illustrated in the drawing has a convex edge 1c, that is, a shape in which the central portion is thicker than the edge 1c when the grip portion 1 is sectioned in the width direction, and therefore a certain strength can be added to the plate-shaped grip portion 1. The rear end 1b side of the linear portion 12 has a substantially trapezoidal shape in plan view.

An anti-slip portion, not shown, may be formed on the surface of the grip portion 1, for example. Examples of such an anti-slip portion include a portion formed with a concave-convex shape including a straight line, various patterns, characters (marks), and the like in a region surrounded by the edge 1 c.

The extension portion 13 is formed to have the gentle curvature as described above in a plan view, and gradually decreases in size in the width direction as it goes toward the distal end 1a where the brush portion 2 is disposed. In this way, the extension portion 13 is formed in a shape having a width gradually decreasing toward the distal end 1a, so that the brush portion 2 can be easily inserted into the gap between the rows of teeth, and operability can be further improved.

The material of the grip portion 1 is not particularly limited, and a synthetic resin material used for a grip portion of a conventional interdental brush can be used without any limitation. As such a synthetic resin material, a general hard resin can be exemplified. Here, the hard resin described in the present embodiment means a resin having a shore a hardness of more than 50. The "Shore A hardness" means the durometer A hardness of plastics measured in accordance with JIS K7215 or JIS K6253.

Examples of the hard resin include thermoplastic resins such as polyolefin, polyester, polystyrene, and polyacetal. Among them, the hard resin constituting the grip portion 1 is preferably polyolefin or polyester, more preferably PP or PBT, and even more preferably PP, from the viewpoint of low molding temperature and improved productivity. As the synthetic resin used for the grip portion 1, 1 kind may be used alone, or 2 or more kinds may be used in combination.

The flexural modulus (JIS K7203) of the hard resin constituting the grip portion 1 is, for example, preferably 800 to 2800MPa, more preferably 800 to 2600MPa, and still more preferably 800 to 2400MPa. If the flexural modulus is equal to or greater than the lower limit, the strength of the grip portion 1 is further improved. If the flexural modulus is equal to or less than the upper limit, the grip portion 1 can be given appropriate flexibility, and thus the operability of the interdental brush 10 can be further improved.

The resin material constituting the grip portion 1 may further contain a reinforcing material from the viewpoint of improving the rigidity of the grip portion. Examples of such reinforcing materials include fibrous reinforcing materials and non-fibrous reinforcing materials. Examples of the non-fibrous reinforcing material include a needle-like reinforcing material, a plate-like reinforcing material, and a granular reinforcing material. Among them, a fibrous reinforcing material is preferable from the viewpoint of further improving the rigidity of the grip portion 1 and further improving the rigidity of the shaft member 21 when the grip portion 1 and the shaft member 21 to be described later are integrally molded from the same resin. Examples of such fibrous reinforcing materials include glass fibers, aramid fibers, carbon fibers, cellulose fibers, and nanocellulose fibers.

The content of the reinforcing material in the grip portion 1 is not particularly limited, and may be appropriately determined so as to ensure the rigidity and toughness after molding in a well-balanced manner in consideration of the type of the reinforcing material and the like.

The grip portion 1 may contain any component other than the hard resin and the reinforcing material.

Examples of the optional component include talc, wollastonite, and an elastomer, in addition to a pigment for imparting a desired color to the grip portion 1.

The content of any component is not particularly limited, and may be appropriately determined in consideration of the color tone and other additional functions of the grip portion 1 after molding.

The synthetic resin constituting the grip portion 1 may be the same as the synthetic resin constituting the shaft member 21 described in detail later, as described above, but may be different synthetic resins as described in detail later.

The outer diameter of the entire grip portion 1 is not particularly limited, and may be appropriately designed in consideration of the ease of gripping by a user, operability when cutting the plurality of connected interdental brushes 10, and the like.

[ Brush portion ]

The brush section 2 is a portion of the interdental brush 10 according to the present embodiment, which is inserted between teeth to remove food waste, tartar, and the like.

As described above, the brush section 2 is provided so as to protrude from the front end 1a of the grip section 1. In the example shown in fig. 2, the brush 2 includes a shaft member 21 made of synthetic resin or the like, and a brush member 22 provided to cover the shaft member 21.

The shaft member 21 is integrally formed of, for example, the same material as the grip portion 1 described above. In the illustrated example, the shaft member 21 is formed to have a length equal to or longer than a predetermined length so as to enhance the brushing effect of the brush section 2 on the teeth. In the illustrated example, the root portion 21a of the shaft member 21 has a substantially trapezoidal cross-section along the longitudinal direction of the interdental brush 10.

From the viewpoint of productivity, the shaft member 21 is preferably integrally formed of the same material as the grip portion 1, but is not limited thereto. For example, the shaft member 21 made of a material different from the grip portion 1 may be molded separately, integrated by insert molding at the time of molding the grip portion 1, or may be molded integrally by two-color molding.

The resin material constituting the shaft member 21 may contain a reinforcing material from the viewpoint of improving the rigidity of the shaft member 21, similarly to the resin material described in the grip portion 1.

Alternatively, as described above, the shaft member constituting the brush 2 may be formed of a wire, and insert molding may be performed using an injection mold.

The thickness of the shaft member 21 is not particularly limited, and may be appropriately determined in accordance with the thickness of the brush section 2 in a state of covering the brush member 22, which can be inserted between teeth.

The length of the shaft member 21 is not particularly limited, and may be appropriately determined in consideration of the interdental wiping effect of the brush 2 in the state of covering the brush member 22.

As described above, the brush member 22 is provided so as to cover the shaft member 21, and in the example shown in fig. 2 and the like, is provided so as to cover substantially the entire shaft member 21 except the vicinity of the root portion 21 a.

The brush member 22 is composed of a main body portion covering the surface of the shaft member 21, and a plurality of protruding pieces provided so as to protrude from the main body portion, and is not shown in detail in fig. 2 and the like.

The main body of the brush member 22 is made of, for example, a soft resin, and is formed in a cap shape to cover the shaft member 21 in the illustrated example. The main body is not limited to the cap-shaped structure as shown in the example, and may be formed by winding a sheet-like member around the shaft member 21.

The protruding piece constituting the brush member 22 is made of, for example, soft resin, and is integrally formed with the main body so as to protrude radially from the surface of the main body. The protruding pieces have flexibility to improve the interproximal wiping property, and are regularly arranged or irregularly arranged on the surface of the main body portion. The arrangement of the protruding pieces can be appropriately determined in consideration of the wiping property between teeth, the feeling of use, and the like.

The arrangement density of the protruding pieces constituting the brush member 22 on the surface of the main body is not particularly limited, and may be appropriately determined in consideration of the wiping property between teeth, the feeling of use, and the like.

The height of the protruding piece from the surface of the main body can be appropriately determined in consideration of the wiping property between teeth, the feeling of use, and the like, similarly to the above.

As described above, the main body and the protruding portion of the brush member 22 are preferably formed of the same material and integrally formed from the same material, but the present invention is not limited thereto, and may be obtained by so-called two-color molding in which the main body and the protruding portion are integrally formed from different materials, for example.

In the present embodiment, as the soft resin constituting the brush member 22, a resin having a shore a hardness of 20 or more and 50 or less may be used.

The soft resin is not particularly limited, and examples thereof include an elastomer such as a styrene-based elastomer, an olefin-based elastomer, and a polyester-based elastomer, and a silicone resin. Among them, when the shaft member 21 is made of polypropylene, a styrene-based elastomer is preferable from the viewpoint of adhesion and the like. The number of soft resins constituting the brush member (main body and protruding portion) 22 may be 1 or 2 or more.

[ Connecting portion ]

The interdental brush group 100 includes a plurality of connecting portions 3 for connecting adjacent interdental brushes 10 to each other, among a plurality of interdental brushes 10 arranged in parallel.

The connecting portions 3 are arranged in plurality in the longitudinal direction of the grip portion 1, and are integrally provided with the grip portion 1. In the example shown in the figure, two coupling portions 3A and 3B are arranged.

The connecting portion 3 has a base end 3a and a tip end 3b. The area where the base end 3a and the grip portion 1 meet is larger than the area where the tip end 3b and the grip portion 1 meet. That is, the area where the distal end 3b contacts the grip portion 1 is smaller than the area where the proximal end 3a contacts the grip portion.

In the case where the interdental brush group 100 is viewed in plan and the extending direction passing through the center of the brush portion is defined as the reference axis J, the distal end 3a of the connecting portion 3 is a surface positioned furthest from the reference axis.

When the interdental brush group 100 is viewed from above and the extending direction passing through the center of the brush is defined as the reference axis J, the base end 3b of the connecting portion 3 is a surface positioned closest to the reference axis.

In the interdental brush 10, the connecting portion 3A is disposed at the position of the curved portion 11, and the connecting portions 3A and 3B have different shapes, among the plurality of connecting portions 3A and 3B provided.

As described above, the connecting portion 3 is provided at a predetermined position in the grip portion 1 (1A, 1B), and a plurality of the interdental brushes 10 according to the present embodiment are arranged in parallel to each other, and the adjacent interdental brushes 10 are connected to each other. In the example shown in fig. 1, 2, and the like, two coupling portions 3A, 3B are arranged in the longitudinal direction of the grip portion 1. In the example shown in fig. 1, 2, etc., as described above, the grip portion 1A provided in the one interdental brush 10A and the grip portion 1B provided in the other interdental brush 10B are connected by the one connecting portion 3A and the other connecting portion 3B.

In the interdental brush set 100 according to the present embodiment, as described above, one connecting portion 3A of the plurality of connecting portions 3A and 3B is disposed in the curved portion 11. As shown in detail in fig. 1, the connecting portions 3A and 3B have different shapes.

Specifically, the maximum areas (hereinafter, may be simply referred to as "maximum areas") of the cross-sectional areas of the connecting portions 3A and 3B in the width direction of the interdental brush 10 are different. The maximum area of the connecting portion 3B in the width direction of the interdental brush 10 is larger than the maximum area of the connecting portion 3A. In the illustrated example, the maximum area of the connecting portion 3B in the width direction of the interdental brush 10 is approximately 2 times the maximum area of the connecting portion 3A.

As shown in fig. 1, the protruding dimension L2 of the connecting portion 3B provided in the extension portion 13 is larger than the protruding dimension L1 of the connecting portion 3A provided in the bending portion 11. The protruding dimensions L1 and L2 may be the heights of the connecting portions 3A and 3B in the width direction of the interdental brush 10. The protruding dimensions L1 and L2 may be the distance between adjacent interdental brushes 10 and 10 in the width direction of the interdental brush 10.

In the interdental brush set 10 of the present embodiment, the distal ends 3B of the plurality of connecting portions 3A and 3B are broken by the above-described structure, so that the adjacent interdental brush 10A and interdental brush 10B can be separated. On the other hand, the base end 3a remains connected to the grip portion 1 without breaking. That is, in the present embodiment, the connecting portions 3A and 3B remain in the grip portion 1A of one interdental brush 10A, while the connecting portions 3A and 3B do not remain in the grip portion 1B of the other interdental brush 10B.

The material of the plurality of connecting portions 3 is not particularly limited, but is preferably obtained by integrally molding the grip portion 1 using the same resin material as that of the grip portion 1 in terms of productivity and cost. As the resin material constituting the plurality of connecting portions 3, a material different from the resin material constituting the grip portion 1 may be used, and the grip portion 1 and the connecting portions 3 may be integrally molded by two-color molding.

The interdental brush 10 included in the interdental brush set 100 according to the present embodiment has a substantially S-shaped grip portion 1 (1A, 1B) in a planar view as shown in fig. 2, and two or more connecting portions 3A, 3B having different shapes are provided on one interdental brush 10A side and the other interdental brush 10B side, respectively. This ensures the state in which the one interdental brush 10A and the other interdental brush 10B are connected, that is, the shape stability before the interdental brushes 10A and 10B are separated from each other, and can be easily twisted off by first separating any one of the connecting portions 3 when the interdental brushes 10A and 10B are separated from each other.

That is, the grip portion 1 has the straight portion 12, the extension portion 13, and the curved portion 11, and the straight portion 12 and the extension portion 13 are connected via the curved portion 11, so the grip portion 1 has a substantially S-shape. At least one connecting portion 3A is provided in the bending portion 11 of the grip portion 1, and at least one other connecting portion 3B is provided at a position other than the bending portion 11, in the present embodiment, at the extension portion 13. Therefore, the protruding dimensions L1 and L2 of the coupling parts 3A and 3B, the angles (hereinafter, sometimes referred to as "setting angles") formed by the base ends 3A and 3A of the coupling parts 3A and 3B and the grip part 1, and the like can be made different, so that the coupling parts 3A and 3B can be made different shapes.

In this way, when the plurality of connecting portions 3A and 3B are separated, the force applied to the connecting portions 3A and 3B is made to be different in application and force magnitude, so that the connecting portions 3A and 3B can be easily separated from each other at one point.

In the interdental brush 10 in the interdental brush set 100 according to the present embodiment, it is not necessary to dispose both the connecting portions 3A and 3B at the curved portion 11, and at least one of the connecting portions may be disposed at the curved portion 11 of the grip portion 1. Even with such a configuration, the protruding dimensions L1, L2 and the installation angle of the coupling portions 3A, 3B can be made different.

Further, since the maximum areas of the connecting portions 3A and 3B in the width direction of the interdental brush 10 are different from each other, the application modes of the forces applied to the connecting portions 3A and 3B and the magnitudes of the forces are significantly different. This makes it possible to easily separate the connecting portions 3A and 3B at one place.

Further, from the standpoint of easily making the application of the force and the difference in the magnitude of the force applied to the connecting portions 3A and 3B, it is more preferable that both of the connecting portions 3A and 3B are disposed in the bending portion 11.

It is preferable that the maximum area of the connecting portion 3B disposed on the distal end 1a side is larger than the maximum area of the connecting portion 3A disposed on the bent portion 11. In this case, the maximum area of the connecting portion 3B disposed on the distal end 1a side is preferably 1.1 to 2.5 times, more preferably 1.1 to 2.0 times, and even more preferably 1.1 to 1.5 times the maximum area of the connecting portion 3A disposed on the curved portion 11.

Of the maximum areas of the plurality of connecting portions 3A and 3B, the connecting portion 3B disposed on the front end 1A side of the grip portion 1 is larger than the connecting portion 3A disposed on the curved portion 11, whereby the connecting portion 3A on the rear end 1B side of the grip portion 1 (1A and 1B) can be easily cut off earlier than the connecting portion 3B on the front end 1A side. On the other hand, when the maximum area of the connecting portion 3A is larger than the maximum area of the connecting portion 3B, it is difficult to separate the connecting portion 3A first in combination with the shape of the grip portion 1 (1A, 1B) having a substantially S-shape in plan view, and therefore, from the viewpoint of convenience of use, the maximum area of the connecting portion 3B is preferably larger. In particular, the effect described above is more remarkably obtained by making the maximum area of the connecting portion 3B larger than the maximum area of the connecting portion 3A by the lower limit value or more of the above range.

In addition, regarding the maximum area of the plurality of connecting portions 3A, 3B, it is preferable that the maximum area of the connecting portion 3B is in the range of 1.5 to 6.5mm ², and the maximum area of the connecting portion 3A is in the range of 1.0 to 5.0mm ². By setting the maximum area of each of the plurality of connecting portions 3A and 3B to be equal to or larger than the lower limit value of the range, it is difficult to separate the plurality of connecting portions 3A and 3B from the grip portion 1B, except for the operation of twisting off the connecting portions 3A and 3B when the interdental brush 10 is used, and durability at the time of conveyance is excellent. On the other hand, by setting the maximum area of each of the plurality of connecting portions 3A, 3B to be equal to or smaller than the upper limit value of the range, the connecting portions 3A, 3B can be twisted off with a small force, and the plurality of interdental brushes 10A, 10B can be cut off. Further, the maximum area of the connecting portion 3B disposed on the front end 1a side of the grip portion 1 is larger than the maximum area of the connecting portion 3A, so that the connecting portion 3A disposed on the rear end 1B side of the grip portion 1 is easily separated from the connecting portion.

From the viewpoint of remarkably obtaining the above-described effects, it is more preferable that the maximum area of the connecting portion 3B is in the range of 1.5 to 6.0mm ², and the maximum area of the connecting portion 3A is in the range of 1.0 to 4.5mm ².

Generally, when the user of the interdental brush 10 screws the connecting portions 3A and 3B to which the plurality of interdental brushes 10A and 10B are connected, the user tends to unintentionally grip the vicinity of the connecting portion 3B disposed on the distal end 1a side of the grip portion 1. As in the present embodiment, the coupling portion 3A on the rear end 1B side is preferably configured to be cut off earlier than the coupling portion 3B on the front end 1a side of the grip portion 1, so that the user can easily apply a force to the remaining coupling portion 3B, which is preferable from the viewpoint of convenience of use.

As shown in fig. 1, in the present embodiment, it is preferable that one connecting portion 3A is provided at a position of the bending portion 11 in the grip portion 1A, and the other connecting portion 3B is provided at a position closer to the distal end 1A than the bending portion 11, among the plurality of connecting portions 3A, 3B, and when the interdental brushes 10A, 10B are connected by the connecting portions 3A and 3B in a plan view, the protruding dimensions from the grip portion 1A are different in the connecting portions 3A and 3B.

As described above, by adopting a configuration in which the protruding dimensions of the connecting portion 3A and the connecting portion 3B from the grip portion 1A are different, a difference occurs in the application manner of the force applied to each of the connecting portions 3A, 3B, and therefore the connecting portions 3A, 3B can be easily separated from each other at one point.

That is, in the example shown in fig. 1 and 2, the coupling portion 3B having a large protruding dimension L2 can secure a large bending or twisting area, and thus can be easily ductile-broken. On the other hand, the connecting portion 3A having a smaller protruding dimension L1 is brittle broken because the area of deflection or distortion is smaller. Therefore, the timing of the disconnection of the connecting portions 3A and 3B can be intentionally shifted. This makes it possible to easily separate the connecting portions 3A and 3B at one place.

For example, it is preferable to shorten the protruding dimension L1 of the connecting portion 3A disposed on the rear end 1B side of the grip portion 1A and then lengthen the protruding dimension L2 of the connecting portion 3B disposed on the front end 1A side of the grip portion 1A. Since the connecting portion 3A is less likely to be broken by brittle fracture due to less bending or twisting, the connecting portion 3B is likely to be broken by ductile fracture due to a large bending or twisting area secured. Thus, the connecting portion 3B is cut off after the connecting portion 3A is cut off.

Further, since the respective connection portions 3A and 3B are not arranged on the same straight line, the plurality of connection portions 3A and 3B are not easily broken at the same time by the force applied in one direction.

The protruding dimensions L1 and L2 of the plurality of coupling parts 3A and 3B are not particularly limited, but the protruding dimension L2 of the coupling part 3B disposed on the front end 1A side of the grip part 1A is preferably larger than the protruding dimension L1 of the coupling part 3A disposed on the rear end 1B side of the grip part 1A. In this case, the protruding dimension L2 of the connecting portion 3B is preferably 1.1 to 2.5 times, more preferably 1.1 to 2.3 times, and even more preferably 1.1 to 2.0 times the protruding dimension L1 of the connecting portion 3A.

As shown in the above range, the protruding dimension L2 of the connecting portion 3B disposed on the front end 1a side of the grip portion 1 is larger than the protruding dimension L1 of the connecting portion 3A disposed on the rear end 1B side, so that the connecting portion 3A on the rear end 1B side is cut off first due to less bending or twisting area, and thus brittle fracture. On the other hand, as shown in the above range, the connecting portion 3B can secure a large bending or twisting area, and therefore is hardly cut by ductile fracture, and the connecting portion 3B is cut after the connecting portion 3A is cut. In addition, by making the protruding dimension L2 of the connecting portion 3B disposed on the distal end 1a side of the grip portion 1 longer, the brush portions 2 of the respective interdental brushes 10A, 10B in the connected state before use are easily prevented from interfering with each other. In particular, the above-described effect is more remarkably obtained by a configuration in which the protruding dimension L2 of the coupling portion 3B is greater than the protruding dimension L1 of the coupling portion 3A by the lower limit value or more of the above-described range.

In addition, regarding the protruding dimensions L1, L2 of the plurality of coupling parts 3A, 3B, it is preferable that the protruding dimension L2 of the coupling part 3B is in the range of 0.6 to 4.0mm, and the protruding dimension L1 of the coupling part 3A is in the range of 0.4 to 3.0 mm. By setting the protruding dimensions L1, L2 of the plurality of connecting portions 3A, 3B to be equal to or greater than the lower limit value of the above range, twisting and breakage of the connecting portions 3A, 3B can be induced in accordance with a twisting and breaking operation by a user. In addition, the interference between the brush portions 2 is more easily avoided. On the other hand, when the protruding dimensions L1, L2 of the plurality of connecting portions 3A, 3B are set to the upper limit value or less of the above range, the connecting portions are brittle at the moment of fracture, and therefore the effect of easy detachment is obtained. Further, the plurality of connecting portions 3A and 3B are stable in the connected state, and therefore are excellent in durability at the time of conveyance. Further, the protruding dimension L2 of the connecting portion 3B disposed on the front end 1A side of the grip portion 1A is made larger, whereby the effect of easy detachment from the connecting portion 3A disposed on the rear end 1B side is obtained.

As shown in fig. 3, in the present embodiment, the dimension L3 from the reference axis J to the distal end 3B of one connecting portion 3A in the width direction, which is the direction orthogonal to the reference axis J, is preferably larger than the dimension L4 from the reference axis J to the distal end 3B of the other connecting portion 3B. With such a configuration, since a difference in torque is generated when the plurality of connecting portions 3A and 3B are twisted off, the connecting portions 3A and 3B can be easily separated from each other by starting from the position of the distal end 3B of the connecting portion 3A disposed on the side farther from the horizontal axis (reference axis J).

The difference between the dimension L3 from the reference axis J to the distal end 3B of the connecting portion 3A and the dimension L4 from the reference axis J to the distal end 3B of the connecting portion 3B is not particularly limited, and for example, the dimension L3 on the connecting portion 3A side is preferably in the range of 1.05 to 2.0 times the dimension L4 on the connecting portion 3B side. With this configuration, when the plurality of connecting portions 3A and 3B are twisted off, the connecting portion 3A disposed on the rear end 1B side of the grip portion 1 is caused to generate a large moment, and therefore can be cut off from the connecting portion 3A side. In particular, the above-described effect is more remarkably obtained by making the dimension L3 from the reference axis J to the distal end 3B of the connecting portion 3A 1.05 to 1.5 times or more the dimension L4 from the reference axis J to the distal end 3B of the connecting portion 3B.

It is preferable that the dimension L3 from the reference axis J to the distal end 3B of the connecting portion 3A is in the range of 4.0 to 20.0mm, and the dimension L4 from the reference axis J to the distal end 3B of the connecting portion 3B is in the range of 3.0 to 15.0 mm. By setting the dimensions L3, L4 from the reference axis J to the distal end 3B of each of the connecting portions 3A, 3B to be equal to or greater than the lower limit value in the above range, the moment at the distal end 3B of each of the connecting portions 3A, 3B becomes large in accordance with the twisting-off operation by the user, and breakage can be induced. Further, the interference between the brush portions 2 is easily avoided. Further, since the dimensions L3, L4 from the reference axis J to the distal end 3B of each of the connecting portions 3A, 3B are set to the upper limit value or less in the above range, the moment is not excessively increased, and the plurality of connecting portions 3A, 3B are stable in the connected state, so that the durability at the time of conveyance is excellent. Further, by making the dimension L3 from the reference axis J to the distal end 3b of the connecting portion 3A larger, the effect of easy detachment from the connecting portion 3A side disposed on the rear end 1b side is obtained.

As in the example shown in fig. 4, in the present embodiment, it is preferable that, when the plurality of interdental brushes 10A and 10B are connected by the one connecting portion 3A and the other connecting portion 3B in a plan view, the curvatures of the connecting portions in the holding portion 1 are different between the base end 3A side connected to the one interdental brush 10A and the tip end 3B side connected to the other interdental brush 10B, respectively.

That is, since the curvatures of the side ends of the respective holding portions 1 facing each other of the one interdental brush 10A and the other interdental brush 10B are different, the position of the force applied to the connecting portion 3 can be biased to either one of the holding portions 1A and 1B. In the illustrated example, breakage at the position of the distal end 3B of the connecting portions 3A and 3B, which is connected to the grip portion 1B provided in the other interdental brush 10B, is biased. This makes it easier to separate the plurality of connecting portions 3A and 3B more effective. Further, since the grip portions 1A and 1B having different curvatures at the side ends are connected to each other by the connecting portions 3A and 3B, the shape can be stabilized even when the distance between the plurality of connecting portions 3A and 3B in the axial direction of the reference axis J is short. In addition, with the above configuration, the interdental brushes 10A and 10B connected before use can be prevented from being folded.

As in the example shown in the partially enlarged view of fig. 5, in the present embodiment, in the grip portion 1 provided with the base ends 3A of the coupling portions 3A, 3B, it is preferable that the curvature in a plan view is different at the portion where the base end 3A of one coupling portion 3A is connected and the portion where the base end 3A of the other coupling portion 3B is connected.

As described above, the curvature of the portion of the grip portion 1A to which the base end 3A of the coupling portion 3A is connected and the curvature of the portion of the coupling portion 3B to which the base end 3A is connected in a plan view are different, and the installation angle of each of the coupling portions 3A and 3B with respect to the grip portions 1A and 1B is different. This makes it possible to make the ease of fracture at the respective connecting portions 3A, 3B different when the respective connecting portions 3A, 3B are twisted off. Specifically, when the connecting portions 3A and 3B are twisted off in the direction of the reference axis J (see fig. 2), the connecting portion of the base end 3A of the connecting portion 3A in the grip portion 1A has a curvature close to parallel to the reference axis J than the connecting portion of the base end 3A of the connecting portion 3B, and therefore is more easily cut off than the connecting portion 3B. In addition, when the portion of the grip portion 1A to which the base ends 3A of the connecting portions 3A and 3B are connected is linear (horizontal) or substantially linear in a plan view, the distal end 3B side is easily broken by the twisting and breaking operation of the connecting portions 3A and 3B. Further, by making the axial directions of the connection portions 3A and 3B different from each other, the effect of stabilizing the connection shape of the connection portions 3A and 3B is obtained even when the distance between the connection portions 3A and 3B is relatively short. On the other hand, for example, when the axial directions of the plurality of connection portions are in the same direction, there is a possibility that the connection shape is not stabilized and the connection portion is easily folded at the time of conveyance or the like (see patent document 1).

As in the example shown in fig. 6, in the present embodiment, in the grip portion 1 of the other interdental brush 10B provided with the distal ends 3B of the connecting portions 3A, 3B, the curvature in a plan view differs between the portion to which the distal end 3B of one connecting portion 3A is connected and the portion to which the distal end 3B of the other connecting portion 3B is connected.

As described above, the curvature in the plan view differs between the portion to which the distal end 3B of the coupling portion 3A is connected and the portion to which the distal end 3B of the coupling portion 3B is connected on the side of the grip portion 1 where the coupling portions 3A and 3B are not left, that is, on the grip portion 1B, whereby the installation (connection) angle of the coupling portions 3A and 3B with respect to the grip portion 1 (1A and 1B) differs. This makes it possible to make the ease of fracture at the respective connecting portions 3A, 3B different when the respective connecting portions 3A, 3B are twisted off. Specifically, the connecting portion of the distal end 3B of the connecting portion 3A in the grip portion 1B has a curvature close to parallel to the reference axis J (see fig. 2), and therefore is easier to be cut off than the connecting portion 3B when the grip portion is twisted off in the direction of the reference axis J. In addition, when the portion of the grip portion 1B to which the distal ends 3B of the connecting portions 3A and 3B are connected is linear (horizontal) or substantially linear in a plan view, the portion is likely to be broken by the twisting-off operation of the connecting portions 3A and 3B. Further, by making the axial directions of the respective connection portions 3A, 3B different from each other, the effect of stabilizing the connection shape of the respective connection portions 3A, 3B is obtained even when the distance between the connection portions 3A, 3B is relatively short, as described above. On the other hand, as described above, if the axial directions of the plurality of connection portions are in the same direction, there is a possibility that the connection shape is not stabilized and the connection portion is easily folded at the time of conveyance or the like (see patent document 1).

As in the example shown in the partially enlarged view of fig. 7, in the present embodiment, it is preferable that the base end 3A side of the plurality of connecting portions 3A and 3B is a trapezoidal portion 31 having a trapezoidal shape, and the tip end 3B side is a broken portion 32 having a shape that gradually decreases toward the tip end 3B in a plan view of the interdental brush 10.

As described above, by forming the base end 3A side of each of the connecting portions 3A and 3B as the trapezoidal portion 31 and forming the tip end 3B side as the constricted fracture portion 32, the position where each of the connecting portions 3A and 3B is cut away can be biased toward the grip portion 1 side provided in the other interdental brush 10B. In this way, the distal end 3B side can be reliably broken when the connecting portions 3A and 3B are twisted off.

< Effect >

As described above, according to the interdental brush set 100 of the present embodiment, at least one of the plurality of connecting portions 3A and 3B is arranged in the curved portion 11 of the grip portion 1, and has different shapes, and the maximum areas of the connecting portions 3A and 3B when projected in the direction orthogonal to the direction protruding from the grip portion 1 are different. This ensures the shape stability of the plurality of interdental brushes 10A and 10B in the connected state, prevents the connecting portions 3A and 3B from being bent by simple operations such as transportation and manufacturing, and allows the plurality of connecting portions 3A and 3B to be sequentially broken one by one only when a specific operation such as an irregular torsional bending operation is performed.

Therefore, the strength against vibration at the time of transportation and at the time of manufacture can be ensured, and the plurality of connected interdental brushes 10A and 10B can be easily separated from each other without requiring a large force.

The interdental brush set 100 of the present embodiment can integrally form a plurality of interdental brushes 10, each having a grip portion 1 and a shaft member 21 constituting a brush portion 2, and a plurality of connecting portions 3, with a resin material.

The brush member 22 constituting the brush section 2 can also be manufactured by insert-molding the shaft member 21 by a simultaneous process using an injection mold.

< Other modes >

The technical scope of the present utility model is not limited to the above-described embodiments, and various modifications can be applied within the scope not departing from the gist of the present utility model.

For example, in the present embodiment, for convenience of explanation, only the interdental brush group 100 in which 2 pieces of one interdental brush 10A and the other interdental brush 10B are connected as shown in fig. 1, 2, etc., will be described, but the number of connection points of the interdental brush 10 is not limited. For example, an interdental brush group may be configured by connecting 10 to 20 interdental brushes 10.

In the present embodiment, the S-shape is described as an example, but the shape is not limited to the S-shape. But may also be curved (e.g., C-shaped). In this case, the grip portion 1 has a straight portion 12 and a curved portion 11.

[ Industrial applicability ]

The present utility model provides an interdental brush set which can ensure the intensity of vibration during transportation and manufacturing, and can easily separate interdental brushes connected by a plurality of connecting parts only when the interdental brushes are separated by a specific operation. Thus, the interdental brush of the present utility model is not only suitable for a so-called non-wire type interdental brush, but also is very suitable for an interdental brush using a metal wire.

Claims

1. A dental brush set having a plurality of dental brushes and a plurality of connecting portions connecting adjacent dental brushes to each other among the plurality of dental brushes,

The plurality of coupling parts have different shapes respectively,

2. The interdental brush set according to claim 1 wherein,

The plurality of connecting parts are provided with at least one connecting part arranged on the bending part and at least one connecting part arranged on a holding part outside the bending part; when at least one connecting portion disposed in the curved portion is one connecting portion and at least one connecting portion disposed in a grip portion other than the curved portion is the other connecting portion, the protruding dimension of the one connecting portion and the other connecting portion protruding from the grip portion to the adjacent grip portion is different in a plan view of the interdental brush group.

3. The interdental brush set according to claim 2 wherein,

When the interdental brush group is viewed from above and the extending direction passing through the center of the brush portion is defined as a reference axis, the distal end of the connecting portion is a surface located at the farthest position from the reference axis, and the dimension from the reference axis to the distal end of one connecting portion in the direction orthogonal to the reference axis is larger than the dimension from the reference axis to the distal end of the other connecting portion.

4. An interdental brush set according to claim 2 or 3 wherein,

When the interdental brush group is viewed from above and the extending direction passing through the center of the brush part is defined as a reference axis, the base end of the connecting part is a surface positioned closest to the reference axis, and the curvature of the grip part provided with the base end of one connecting part is different from the curvature of the grip part provided with the base end of the other connecting part.

5. An interdental brush set according to claim 2 or 3 wherein,

When the interdental brush group is viewed from above, the curvature of the grip portion to which the base end of the one connecting portion is connected is different from the curvature of the grip portion to which the base end of the other connecting portion is connected.

6. An interdental brush set according to claim 2 or 3 wherein,

In a plan view of the interdental brush set, a curvature of the grip portion to which the distal end of the one connecting portion is connected is different from a curvature of the grip portion to which the distal end of the other connecting portion is connected.

7. An interdental brush set according to claim 1 or 2 wherein,

The base end side of the plurality of connecting portions is a trapezoid portion having a vertical cross-sectional trapezoid shape when the interdental brush group is viewed in plan, and the tip end side is a fracture portion having a shape that gradually decreases toward the tip end side.