Dental floss roll and dental floss holder

Abstract

We provide a dental floss roll that is resistant to deformation and leaves no sticky residue on the pulled-out dental floss. [Solution] The device comprises a hollow winding body 2 formed by spirally winding and layering dental floss 3, and a cylindrical shape-retaining body 6 attached around the hollow winding body 2, formed such that the outer peripheral surface 2a of the hollow winding body 2 is surrounded by a circumferential sheet 7 via an adhesive layer 8. The hollow winding body 2 is formed so that the dental floss 3 can be pulled out from its inner peripheral surface 2b. Except for a series of outermost dental floss 3A wound along the adhesive layer 8, the device is formed so that when the dental floss 3 of the hollow winding body is pulled out, the entire series of outermost dental floss 3A does not collapse from the inner contour of the cylindrical shape-retaining body 6. Furthermore, when the outermost dental floss 3A is peeled off from the adhesive layer 8, no adhesive from the adhesive layer 8 remains on the surface of the outermost dental floss 3A.

Description

[Technical Field]

[0001] The present invention relates to a dental floss roll and a dental floss holder [Background Art]

[0002] A dental floss roll formed by winding dental floss around a vertical core rod is housed in a vertically elongated, bottomed cylindrical base cylinder portion, a support cylinder member having a bifurcated support portion on an upper half portion is fitted to an opening end of the base cylinder portion, and the dental floss pulled out from the dental floss roll is stretched between both tip ends of the bifurcated support portion via a slit provided in a lower half portion of the support cylinder member. Such a configuration is known (Patent Document 1). [Prior Art Literature] [Patent Literature]

[0003] [Patent Document 1] Japanese Unexamined Patent Publication No. 2010-178899 [Patent Document 2] Japanese Unexamined Patent Publication No. 2016-131606 [Summary of the Invention] [Problem to be Solved by the Invention]

[0004] In Patent Document 1, dental floss is wound around a core rod, and in order to perform the drawing operation more efficiently, there is known a dental floss roll provided so that dental floss can be drawn out from the inner side of a cylindrical dental floss roll (Patent Document 2). In Patent Document 2, instead of arranging a core material, an outer peripheral sheet is further wound around the outer side of a cylindrical roll formed by winding dental floss, so that even when the amount of dental floss decreases, the shape of the dental floss remaining on the roll side does not collapse, and the dental floss can be drawn out through a hollow portion inside the roll. In addition, in order to enhance the effect of preventing shape collapse, it has also been proposed to arrange an adhesive between the roll and the outer peripheral sheet. However, depending on the type and strength of the adhesive layer, adhesive residue may remain on the dental floss after it is pulled from the roll, making it undesirable as an interdental cleaning tool to be placed in the mouth. Furthermore, in Patent Document 2, an insertion hole is opened at a suitable location in the peripheral wall of the container body that houses the cylindrical roll, and the dental floss is taken out through this insertion hole. However, this configuration has the disadvantage that if too much dental floss is taken out, it will be wasted.

[0005] The first objective of the present invention is to provide a dental floss roll that is resistant to deformation and leaves no adhesive residue on the pulled-out dental floss. A second object of the present invention is to provide a dental floss holder that allows for the efficient use of dental floss. [Means for solving the problem]

[0006] The first means is a dental floss holder suitable for storing and using a dental floss roll 1, which is provided in such a way that the dental floss 3 can be pulled out from the inner circumferential surface 2b side of a hollow winding body 2 formed by winding dental floss 3 in layers. A bottomed cylindrical base 10 having a storage space S for the dental floss roll 1 inside, At the upper and lower end openings, a joint cylinder 14 is fitted to the upper end of the base cylinder 10, A cap body 40 is formed by erecting a stick rod 56 having an upper floss insertion hole 60 at the upper end of a mounting cylinder 42 that is attached to the joint cylinder 14 from the intermediate cylindrical portion 20 to the upper cylindrical portion 30, It is equipped with, The cap body 40 is rotatably fitted onto the joint cylinder 14. The intermediate cylindrical portion 20 has a winding groove 24 formed therein for winding the dental floss roll 1. This winding groove 24 is defined between a flange portion 28 provided around the outer surface of the intermediate cylindrical portion 20 and an upward-facing annular step portion 26 facing the lower surface of the flange portion 28. A floss introduction slit 32 is vertically provided from the upper end of the joint cylinder 14 to the flange portion 28. A lower floss insertion hole 46 is provided in the mounting cylinder 42, positioned outside the winding groove 24.

[0007] This means is a dental floss holder suitable for storing and using a dental floss roll 1, which is provided in such a way that the dental floss 3 can be pulled out from the inner circumferential surface 2b side of a hollow winding body 2 formed by winding dental floss 3 in layers. As shown in Figure 3, an exploded view of this dental floss holder, it has the following main components. • The base cylinder 10 has a bottomed cylindrical shape and has a storage space S for a dental floss roll 1 inside. • Joint cylinder 14 that fits into the upper end of the base cylinder 10 at the upper and lower end openings. • A cap body 40 is formed by attaching a mounting cylinder 42 that extends from the intermediate cylindrical portion 20 to the upper cylindrical portion 30 of the joint cylinder 14, and erecting a stick rod 56 having an upper floss insertion hole 60 at its upper end. The cap body 40 is rotatably fitted onto the joint cylinder 14. As shown in Figure 3, a winding groove 24 for winding the dental floss roll 1 is formed in the intermediate cylindrical portion 20. This winding groove 24 is defined between a flange portion 28 provided around the outer surface of the intermediate cylindrical portion 20 and an upward-facing annular step portion 26 facing the lower surface of the flange portion 28. Furthermore, a floss introduction slit 32 is vertically provided from the upper end of the joint cylinder 14 to the flange portion 28, and a lower floss insertion hole 46 is opened in the mounting cylinder 42, positioned outside the winding groove 24. With this structure, as shown in Figure 6(C), the length of the dental floss 3 pulled out from the dental floss holder can be adjusted, allowing only the required length to be used.

[0008] The second method involves a hollow wound body 2 formed by spirally winding dental floss 3 and winding it in layers, The system comprises a cylindrical shape-retaining body 6 which is attached around the hollow wound body 2 and is formed such that the entire outer surface 2a of the hollow wound body 2 is surrounded by a circumferential sheet 7 via an adhesive layer 8, The hollow wound body 2 is formed such that the dental floss 3 can be pulled out from its inner circumferential surface 2b. A dental floss roll is formed such that, when the dental floss 3 of the hollow winding body 2 is pulled out, the entire series of outermost dental floss 3A does not collapse from the inner contour of the cylindrical shape-retaining body 6, and the outermost dental floss 3A can be pulled out sequentially in the cylindrical axis direction O, except for a series of outermost dental floss 3A wound along the adhesive layer 8. The type and strength of the adhesive were set so that when the outermost dental floss 3A is peeled off from the adhesive layer 8, no adhesive from the adhesive layer 8 remains on the surface of the outermost dental floss 3A.

[0009] This means is a dental floss roll, and as shown in Figures 1(A) and 1(C), it comprises a hollow winding body 2 formed by spirally winding and layering dental floss 3, and as shown in Figure 1(B), a cylindrical shape-retaining body 6 attached around the hollow winding body 2, formed such that the entire outer surface 2a of the hollow winding body 2 is surrounded by a circumferential sheet 7 via an adhesive layer 8. As shown in Figure 1(A), the hollow wound body 2 is formed so that the dental floss 3 can be pulled out from its inner circumferential surface 2b. Furthermore, as shown in Figure 1(C), when the dental floss 3 of the hollow winding body 2 is pulled out, except for the series of outermost dental floss 3A wound along the adhesive layer 8, the entire series of outermost dental floss 3A does not collapse from the inner contour of the cylindrical shape-retaining body 6, and the outermost dental floss 3A can be pulled out sequentially in the cylindrical axis direction O (see Figure 1(D)). This design prevents the dental floss from getting tangled during the final stage of the pulling-out process, allowing it to be used properly until the very end. Further, the type and adhesive strength of the adhesive are set such that when the outermost dental floss 3A is peeled from the adhesive layer 8, no adhesive of the adhesive layer 8 remains on the surface of the outermost dental floss 3A. According to this structure, the inconvenience of interdental cleaning with dental floss 3 to which adhesive substance has adhered can be avoided.

[0010] The third means comprises the second means, and the dental floss 3, in a state of being wound and layered as a part of the hollow wound body 2, is belt-shaped when viewed from the cylinder radial direction.

[0011] In the present means, as shown in FIG. 1(C), the dental floss 3, in a state of being wound and layered as a part of the hollow wound body 2, is belt-shaped when viewed from the cylinder radial direction (see also FIG. 1(B) and FIG. 1(E)). According to this structure, in the outermost dental floss 3A, the outer peripheral surface 5 of the belt-shaped dental floss adheres (sticks) to the adhesive layer 8, so that the adhesive force is improved.

[0012] The fourth means comprises the second means, and the adhesive layer 8 uses an adhesive having an adhesive strength to stainless steel in the range of 2940 to 15190 mN / 25 mm.

[0013] In the present means, the adhesive layer 8 uses an adhesive having an adhesive strength to stainless steel in the range of 2940 to 15190 mN / 25 mm. According to this structure, the following effects can be obtained. First, as shown by imaginary lines in FIG. 2, tangling of the dental floss can be suppressed on the path before the dental floss is pulled out to the outside through outlets 35 and 46 of the storage container (in the illustrated example, the base cylinder of a dental floss holder). Second, the removability of the adhesive layer 8 can be ensured. Effects of the Invention

[0014] A dental floss roll that is less prone to deformation and leaves no adhesive residue on the pulled-out dental floss can be provided. Furthermore, we can provide a dental floss holder that allows for the efficient use of dental floss. [Brief explanation of the drawing]

[0015] [Figure 1] Figure (A) shows the structure and operation of a dental floss roll according to an embodiment of the present invention. Figure (B) is a cross-sectional view seen from the side, Figure (C) is a partially enlarged view of the cross-sectional view, Figure (C) is an intermediate view of the process of pulling out the dental floss, Figure (D) is a view of the final stage of the pulling out process, and Figure (E) is a partially enlarged view of the stage. [Figure 2] This is a cross-sectional view of a dental floss holder according to an embodiment of the present invention. [Figure 3] Figure 2 is an exploded side view of the dental floss holder. [Figure 4] Figure 2 is an exploded perspective view of the dental floss holder. [Figure 5] This table shows the results of tests conducted to evaluate the adhesive strength of the adhesive. [Figure 6] Figure 2 is an explanatory diagram of the operation of the dental floss holder. Figure (A) shows the stage in which dental floss is pulled out from inside the base cylinder through the floss introduction slit of the joint cylinder, the lower floss insertion hole and the upper floss insertion hole of the cap body. Figure (B) shows the state in which the cap body is fitted onto the joint cylinder. Figure (C) shows the stage in which the cap body is rotated relative to the joint cylinder to wind the dental floss into the winding groove. [Best Mode for Carrying Out the Invention]

[0016] For the sake of explanation, I will first explain dental floss rolls. Figure 1 shows a dental floss roll 1 according to an embodiment of the present invention. As shown in Figure 1(A), this dental floss roll 1 is composed of a hollow winding body 2 and a cylindrical shape-retaining body 6.

[0017] The hollow wound body 2 is a component formed by spirally winding and layering dental floss 3, and has a hollow portion V inside, without a core material. Instead of a core material, a cylindrical shape-retaining body 6 is placed on the outside, and the shape (cylindrical) along the inner contour of the cylindrical shape-retaining body 6 is maintained even when the amount of dental floss 3 decreases due to use. In this specification, the term "wound" shall be used to mean that the outer dental floss is wound around the inner layer of dental floss. However, the wound body may be formed by winding a core material during the manufacturing process, and the core material may be removed after manufacturing. Dental floss 3 is made by combining extremely fine threads. Furthermore, the hollow wound body 2 is formed such that the dental floss 3 can be pulled out to the outside through the cavity V from its inner circumferential surface 2b. In the illustrated example, the dental floss 3 is a thin, flat strip that is wound as part of the hollow reel 2. This configuration ensures that the adhesive layer 8, described later, exhibits sufficient adhesion to the surface 5 of the outermost dental floss (outermost dental floss 3A) of the hollow reel 2, as shown in Figures 1(B) and 1(E). However, the dental floss 3 does not need to be formed into a strip shape from the molding stage. By applying sufficient tightening force during the stage in which the dental floss 3 is wound spirally and layered to form the hollow wound body 2, it deforms into a flat strip shape (plastic deformation). In this case, the dental floss 3B pulled out from the hollow reel 2 maintains a strip-like shape, as shown in Figure 1(A). As it passes through the insertion path of the dental floss holder (referring to the floss introduction slit 32, the lower floss insertion hole 46, and the upper floss insertion hole 60, etc., described later), it changes from its initial strip-like shape (the shape when incorporated into the hollow reel) to a string-like shape suitable for interdental cleaning. However, this structure can be modified as appropriate. Suitable materials for dental floss 3 include polyester and nylon, and cotton and silk can also be used.

[0018] The cylindrical shape-retaining body 6 is a component attached around the hollow wound body 2, and as shown in Figure 1(B), it consists of a circumferential sheet 7 and an adhesive layer 8 formed on the entire inner surface of the circumferential sheet 7. The cylindrical shape-retaining body is configured to surround the entire outer surface 2a of the hollow wound body 2 with a circumferential sheet 7 via an adhesive layer 8, thereby maintaining the shape of the outer surface 2a of the hollow wound body 2.

[0019] In the illustrated example, the circumferential sheet 7 has a seam 7a, as shown in Figure 3. That is, the circumferential sheet in the illustrated example is made by wrapping the outer surface 2a of the hollow wound body 2 around the edge of a single rectangular base sheet, using the edge as an adhesive margin, then overlapping and joining (adhering) them together. By adjusting the length of this overlap, a single type of base sheet can be used to accommodate individual differences in the diameter and length of the cylindrical shape-retaining body 6. However, this structure can be modified as appropriate. The peripheral sheet 7 can be formed from a transparent material. Furthermore, the circumferential sheet 7 can be formed from, for example, polyvinyl chloride. The circumferential sheet 7 shall have sufficient strength to maintain the shape of the hollow wound body 2. As an example of the specifications for the circumferential sheet 7, it has a thickness of 80 μm and a tensile strength of 29.0 N / mm². 2 It can be made of polyvinyl chloride.

[0020] The adhesive layer 8 maintains sufficient adhesive strength to the outer surface 2a of the hollow wound body 2, even when the amount of dental floss 3 remaining decreases. The adhesive force is set such that, with the exception of the series of outermost dental floss 3A wound along the adhesive layer 8, when the dental floss 3 of the hollow winding body 2 is pulled out, the entire series of outermost dental floss 3A does not collapse from the inner contour of the cylindrical shape-retaining body 6, and the outermost dental floss 3A can be pulled out sequentially in the cylindrical axis direction O. This prevents the dental floss 3B from getting tangled at the exit of the storage space S (the lower end 35 of the floss introduction slit 32 and the lower floss insertion hole 46 in the illustrated example) when it is stored in the dental floss holder described later. As a preferred example, we recommend using a strong adhesive with an adhesive strength to stainless steel of approximately 15190 mN / 25 mm. Furthermore, the type and strength of the adhesive are set so that when the outermost dental floss 3A is peeled off from the adhesive layer 8, no adhesive from the adhesive layer 8 remains on the surface of the outermost dental floss 3A. Specifically, a repositionable adhesive should be used that allows the adhesive to be removed multiple times without leaving any residue on the removal surface. However, even with a repositionable adhesive, if the adhesive strength is set excessively high, there is a possibility that adhesive residue may remain on the removal surface. Therefore, the adhesive strength should be set while ensuring the ability to remove the dental floss 3. In this test, the applicant applied an adhesive layer using a highly adhesive, repositionable adhesive with an adhesive strength of approximately 15190 mN / 25 mm to stainless steel to a polyester product (dental floss), and analyzed the surface condition of the product before and after adhesion using infrared spectroscopy. As a result, the spectral peaks matched, indicating that the surface was formed of the same material before and after adhesion. Therefore, it can be concluded that no amount of adhesive remains on the surface that would affect the outside.

[0021] Figure 5 shows the results of a test conducted by the applicant on the adhesive strength of the adhesive layer of the tubular shape-retaining body 6 to dental floss. The test conditions were as follows: the object to which the adhesive layer was to be applied had a thickness of 80 μm and a tensile strength of 29.0 N / mm². 2 Polyvinyl chloride was used. The dental floss with an adhesive strength of 17640mN / 25mm against stainless steel was rejected because its adhesive strength was too strong. In this case, the strong adhesive would make it difficult for the outer edge of the dental floss roll 1 to detach, potentially causing problems such as difficulty in smoothly pulling out the dental floss 3 or resulting in wobbling. The adhesive with a bonding strength of 60mN / 25mm against stainless steel was rejected because its adhesive strength was too weak. While adhesives with a bonding strength of 2940 mN / 25 mm against stainless steel were usable, they were not optimal. The adhesive with the best adhesion to stainless steel, at 15190 mN / 25 mm, was selected.

[0022] In the above configuration, when using a dental floss roll, it is used together with the dental floss holder described later, but here, for the sake of explanation, we will describe the function of the dental floss roll alone. When the dental floss 3B pulled out from the hollow reel 2 is grasped and pulled, the dental floss 3 is sequentially pulled out from the inner circumferential surface 2b of the hollow reel 2. The pulled-out dental floss 3 is used for interdental cleaning. As the amount of dental floss 3 decreases with use, and as shown in Figure 1(C), when only the outermost dental floss 3A remains, the holding effect of the inner dental floss 3 is lost. However, the shape of the outer surface 2a of the hollow wound body 2 is maintained by the shape-retaining force of the tubular shape-retaining body 6 (adhesive force of the adhesive layer 8). In this state, if the dental floss 3B outside the hollow winding body 2 is pulled further, the entire series of outermost dental floss 3A can be pulled out sequentially in the cylindrical axis direction O without the outermost dental floss 3A collapsing from the inner contour of the cylindrical shape-retaining body 6. Then, from the state shown in Figure 1(D), pull the end 4 of the dental floss 3 and peel it off from the adhesive layer 8 to complete the pulling operation.

[0023] Figures 2 to 6 disclose a dental floss holder according to an embodiment of the present invention, with a dental floss roll 1 built inside. In this embodiment, the dental floss holder consists of a base cylinder 10, a joint cylinder 14, and a cap body 40, as shown in Figure 2. However, this structure can be modified as appropriate. These components can be formed from, for example, synthetic resin materials.

[0024] The base cylinder 10 is a bottomed cylindrical member and has a storage space S inside for storing the dental floss roll 1. The upper part of the cylinder wall has a male threaded portion 16 and a female threaded portion 11 of the joint cylinder 14. Furthermore, a cutter 12 for cutting dental floss 3 is attached to the outside of the base cylinder 10.

[0025] As shown in Figure 3, the joint cylinder 14 is a member with openings at both the upper and lower ends that linearly connects the base cylinder 10 and the cap body 40. The joint cylinder 14 also has a side hole 35 (in the illustrated example, the lower end of the floss introduction slit 32) for pulling the dental floss 3 out to the side. The joint cylinder 14 of this embodiment is composed of a lower cylinder portion 15, an intermediate cylinder portion 20, and an upper cylinder portion 30, as shown in Figure 3. In the illustrated example, the lower surface of the lower cylinder portion 15 is a horizontal and flat annular contact surface 19. When the dental floss roll 1 is pulled up by the pulling force during the operation to pull out the dental floss 3, as shown by the dashed line in Figure 2, the upper surface of the dental floss roll 1 abuts against the annular contact surface 19, and the process of pulling out the dental floss 3 from the hollow winding body 2 is performed stably. Furthermore, the cylindrical hole H of the joint cylinder 14 consists of a tapered lower half h1 that narrows in diameter upwards and an upper half h2 that is approximately the same diameter. The reason for adopting the tapered lower half h1 is to chamfer the corner at the lower end of the cylindrical hole H, which makes the extraction of the dental floss 3 smoother.

[0026] The lower cylindrical portion 15 has a large outer diameter portion 17 on its outer circumferential surface that is the same diameter as the base cylinder 10, and a male thread portion 16 is attached to the lower side of this large outer diameter portion 17, and a transverse rib 18 is attached to the upper side thereof. However, this structure can be modified as appropriate.

[0027] The intermediate cylindrical portion 20 has a receiving groove 22, an upward-facing annular step portion 26, and a flange portion 28 provided around its outer circumferential surface, running from bottom to top. A winding groove 24 for winding the dental floss roll 1 is formed between the annular stepped portion 26 and the flange portion 28. In the illustrated example, the upper cylindrical portion 30 has a smaller diameter than the flange portion 28 and is erected above the flange portion 28. Furthermore, a floss introduction slit 32 is formed that runs longitudinally through the upper cylindrical portion 30 and the flange portion 28, extending from the upper end of the upper cylindrical portion 30 to the winding groove 24, for inserting the dental floss 3. The upper half of the floss introduction slit 32 is formed as a tapered portion 33 that narrows in width towards the bottom, and the lower half of the floss introduction slit 32 is formed as a portion of constant width 34. The lower end 35 of the floss introduction slit 32 is positioned at the bottom of the winding circumferential groove 24.

[0028] The cap body 40 is rotatably fitted onto the joint cylinder 14, and in this embodiment, as shown in Figure 3, it has a mounting cylinder 42 and a stick rod 56 that rises from the mounting cylinder 42. The mounting cylinder 42 is mounted on the joint cylinder 14 from the intermediate cylindrical portion 20 to the upper cylindrical portion 30. Furthermore, the upper part of the stick rod 56 has an upper floss insertion hole 60. As shown in Figure 2, the upper floss insertion hole 60 in the illustrated example has a forward-opening inlet 61 and an upward-opening outlet 62, with a cross-section shaped like a "V". For the sake of clarity, in this specification, the right side of Figure 2 will be referred to as "rear," the left side as "front," and the directions perpendicular to the plane of the paper will be referred to as left and right. The mounting cylinder 42 in the illustrated example comprises a straight cylinder portion 44 and a tapered cylinder portion 50 consisting of a tapered cylindrical portion 51 and a tapered rectangular cylinder portion 52, extending from bottom to top. The tapered rectangular cylinder portion 52 serves as a finger grip when rotating the cap body 40 relative to the base cylinder 10. The straight cylindrical portion 44 is the part that is rotatably fitted into the intermediate cylindrical portion 20 of the joint cylinder 14. Multiple locking portions 48 that can engage with the receiving groove 22 of the intermediate cylindrical portion 20 are attached to the inner surface of the straight cylindrical portion 44 at a suitable location (the lower end portion in the illustrated example). This prevents the cap body 40 from accidentally coming off the joint cylinder 14. However, the user can release the engagement between the locking portions 48 and the receiving groove 22 by pulling the cap body 40 upward. Furthermore, the straight cylindrical portion 44 has a lower floss insertion hole 46 that, when rotated, can be aligned with the floss introduction slit 32 when viewed from the radial direction. The lower floss insertion hole 46 and the aforementioned lower floss insertion hole 46 both open in the same direction (forward in the illustrated example). In addition, in the illustrated example, the width of the lower floss insertion hole 46 is formed to be approximately the same as the width of the constant width portion 34 of the floss introduction slit 32. However, these structures can be modified as needed. The tapered cylindrical portion 50 has its upper end closed, and a fitting rod portion 54 is provided that rotatably fits into the upper cylindrical portion 30 of the joint cylinder 14 from the closed portion.

[0029] In the above configuration, when using the dental floss holder, a certain length of dental floss 3B is pulled out from the dental floss roll 1, and the dental floss roll 1 is inserted into the base cylinder 10. Next, as shown by dashed lines in Figure 6(A), the pulled-out dental floss 3B is inserted from the lower end opening to the upper end opening of the joint cylinder, and the joint cylinder 14 is fitted onto the upper end of the base cylinder 10. Next, as shown by the solid line in Figure 6(A), the pulled-out dental floss 3B is passed through the lower floss insertion hole 46, and then inserted through the entrance 61 to the exit 62 of the upper floss insertion hole 60. Next, as shown in Figure 6(B), the cap body 40 is fitted onto the intermediate cylindrical portion 20 of the joint cylinder 14, taking care to ensure that the lower end portion 35 of the floss introduction slit 32 and the lower floss insertion hole 46 align (overlap when viewed radially). In this state, as shown in Figure 6(C), when the base cylinder 10 and joint cylinder 14 are rotated in the positive direction (the direction in which the floss is wound) relative to the cap body 40, this rotation causes the position of the lower floss insertion hole 46 relative to the lower end 35 of the floss introduction slit 32 to be displaced relatively. As a result, the dental floss 3B that has already been pulled out to the outside is drawn into the inside of the mounting cylinder 42 through the upper floss insertion hole 60 and the lower floss insertion hole 46 and can be wound around the winding groove 24. These operations are simple and therefore easy for users to perform. Furthermore, if the user accidentally pulls out too much dental floss 3, the aforementioned mechanism allows them to rewind the excess length of dental floss 3, thus eliminating waste of dental floss 3. Furthermore, the manufacturer can produce the product by housing a pre-made, mass-produced dental floss roller in the base cylinder 10, inserting the dental floss 3B that has been pulled out to the outside into the floss introduction slit 32, the lower floss insertion hole 46, and the upper floss insertion hole 60, and then assembling the joint cylinder 14 to the base cylinder 10 and the cap body 40 to the joint cylinder 14. With conventional dental floss storage cases, it was necessary to wind the dental floss onto the spool (winding) part of the case. This required either doing it by hand or using a machine specifically for winding, neither of which was easy. In contrast, the dental floss holder of the present invention makes it easy to equip the dental floss. [Explanation of symbols]

[0030] 1…Dental floss roll 2…Hollow wound body 2a…Outer surface 2b…Inner surface 3... Dental floss 3A... Outermost dental floss 3B...Dental floss pulled out 4...End end 5...Surface 6...Cylindrical shape-retaining body 7...Circumferential sheet 7a...Seam 8...Adhesive layer 10...Base cylinder 11...Female thread section 12...Cutter 14... Joint cylinder 15... Lower cylinder section 16... Male thread section 17... Large outer diameter 18...Transverse rib 19...Annular contact surface 20...Intermediate cylindrical section 22...Receiving groove 24...Circumferential groove for winding 26...Annular stepped section 28...Flange section 30...Upper cylindrical section 32...Floss introduction slit 33...Tapered section 34...Section of constant width 35...Lower end (side hole) 40...Cap body 42...Mounting cylinder part 44...Straight cylinder part 46...Lower floss insertion hole 48... Locking part 50... Tapered cylindrical part 51... Tapered cylindrical part 52... Tapered rectangular part 54...Matching rod section 56...Stick rod 60... Upper floss insertion hole 61... Inlet 62... Outlet H...Cylindrical opening h1...Lower half h2...Upper half O...Axis of the cylinder S...Storage space V...Cavity

Claims

1. A dental floss holder suitable for storing and using a dental floss roll (1) which is provided so that the dental floss (3) can be pulled out from the inner circumferential surface (2b) side of a hollow winding body (2) formed by winding dental floss (3) in layers, A bottomed cylindrical base tube (10) having a storage space (S) for the dental floss roll (1) inside, At the upper and lower end openings, a joint cylinder (14) is fitted to the upper end of the base cylinder (10), A cap body (40) is formed by erecting a stick rod (56) having an upper floss insertion hole (60) at the upper end of a mounting cylinder (42) which is attached to the intermediate cylindrical portion (20) of the joint cylinder (14) extending to the upper cylindrical portion (30), It is equipped with, The cap body (40) is rotatably fitted onto the joint cylinder (14), The intermediate cylindrical portion (20) has a winding groove (24) formed therein for winding the dental floss roll (1). This winding groove (24) is defined between a flange (28) provided around the outer surface of the intermediate cylindrical portion (20) and an upward-facing annular step (26) facing the lower surface of the flange (28). A floss introduction slit (32) is vertically provided from the upper end of the joint cylinder (14) to the flange portion (28), A dental floss holder characterized in that a lower floss insertion hole (46) is opened in the mounting cylinder (42) and positioned outside the winding groove (24).

2. A hollow wound body (2) is formed by spirally winding dental floss (3) and winding it in layers, The present invention comprises a cylindrical shape-retaining body (6) which is attached around the hollow wound body (2) and formed such that the entire outer surface (2a) of the hollow wound body (2) is surrounded by a circumferential sheet (7) via an adhesive layer (8), The hollow wound body (2) is formed such that the dental floss (3) can be pulled out from its inner circumferential surface (2b). A dental floss roll is formed such that, when the dental floss (3) of the hollow winding body (2) is pulled out, the entire series of outermost dental floss (3A) does not collapse from the inner contour of the cylindrical shape-retaining body (6), and the outermost dental floss (3A) can be pulled out sequentially in the cylindrical axis direction (O), except for the series of outermost dental floss (3A) wound along the adhesive layer (8), A dental floss roll characterized in that the type and adhesive strength of the adhesive are set so that when the outermost dental floss (3A) is peeled off from the adhesive layer (8), no adhesive from the adhesive layer (8) remains on the surface of the outermost dental floss (3A).

3. The dental roll according to claim 2, characterized in that the dental floss (3) is in the shape of a strip when viewed from the cylindrical diameter direction when it is wound and overlapped as part of the hollow wound body (2).

4. The dental roll according to claim 2, characterized in that the adhesive layer (8) uses an adhesive having an adhesive strength to stainless steel in the range of 2940 to 15190 mN / 25 mm.

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