JPH05317339A - Dental floss - Google Patents

Abstract

PURPOSE:To reduce the cost and reduce industrial wastes by merely replacing a floss thread. CONSTITUTION:A pair of openable pinching pieces 6, 6 are provided on a floss attachment 2. A floss thread 4 is pinched and fixed between the pinching pieces 6, 6. The tensile state of the floss thread 4 is maintained by the pinching pieces 6, 6. The floss thread 4 can be easily replaced when the pinching pieces 6, 6 are opened. A floss holder 3 can be continuously used as it is, and the cost can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dental floss for cleaning a space between teeth, and more particularly to a technique for detaching a floss thread from a floss attachment.

[0002]

2. Description of the Related Art Conventionally, as a dental floss of this type, for example, a floss thread is stretched on an arcuate floss holder at the same time, or a floss tip is attached to the floss holder and the floss thread is attached to the floss tip. Is known to be stretched and co-molded, or there is also known to market only floss yarn as a single item.

[0003]

In such a conventional dental floss, since the floss yarn is simultaneously formed in the floss holder, the life of the floss yarn is lost by cleaning the interdental portion once, and the next time the cleaning is performed. When using a new one,
It is necessary to replace the floss holder with the floss thread,
There is a problem that it causes an increase in cost and leads to an increase in industrial waste.

The present invention has been made in view of the above problems of the prior art, and the purpose thereof is to replace only the floss thread, which is excellent in economic efficiency and can reduce industrial waste. The purpose is to provide floss.

[0005]

The invention according to claim 1 is
The floss attachment 2 is provided with a holding and fixing portion, and the floss yarn 4 is detachably held by the holding and holding portion. According to a second aspect of the present invention, the floss attachment 2 includes a floss tip 2a and a floss holder 3,
The floss yarn 4 can be sandwiched by the connecting portion of the floss tip 2a and the floss holder 3.

According to a third aspect of the present invention, the holding and fixing portion of the floss attachment 2 has a pair of holding pieces 6 for holding the floss yarn 4, and each holding piece 6 can be fastened by a wedge-shaped holding metal fitting 22. It is composed of. According to a fourth aspect of the present invention, the holding and fixing portion of the floss attachment 2 includes a stator 30 and a rotator 31 which are hinged.
And both contact surfaces 30 of the stator 30 and the rotator 31.
The floss yarn 4 is detachably clamped between a and 31a.

According to a fifth aspect of the present invention, the holding and fixing portion of the floss attachment 2 has a guide groove 45 for the floss yarn 4.
A wedge member 46 is slidably mounted along the above, and the floss yarn 4 is sandwiched between the wedge member 46 and the guide groove 45 by sliding the wedge member 46 in the tightening direction. According to the invention of claim 6, both contact surfaces 30a, 31a of the stator 30 and the rotator 31 of claim 4 are provided.
In addition, the metal member 40 is insert-molded.

In the invention according to claim 7, the metal member 40 according to claim 6 is provided with a blade portion 41, and the cut portion of the floss yarn 4 sandwiched between the metal members 40 can be cut by the blade portion 41. It is a thing. According to an eighth aspect of the present invention, the holding and fixing portion of the floss attachment 2 includes an outer screw 50 formed on the floss attachment 2 and a cap 51 having an inner screw 52 screwable to the outer screw 50.
The floss yarn 4 is sandwiched between the outer screw 50 and the inner screw 52.

According to a ninth aspect of the invention, the floss attachment 2 is detachably coupled to the electric toothbrush 60,
The floss thread 4 is sandwiched between the connecting portions of the floss attachment 2 and the electric toothbrush 60. According to a tenth aspect of the invention, the holding and fixing portion of the floss attachment 2 is
A pair of holding pieces 6 and 6 that can be opened and closed centering around the fulcrum 10 is provided, and the holding pieces 6 and 6 are operated to open and close at a portion behind the fulcrum 10.

[0010]

According to the present invention, the floss attachment 2 is provided with the holding and fixing portion, and the floss yarn 4 is detachably held by the holding and fixing portion. Therefore, the floss yarn 4 is only held by the holding and fixing portion. The tensioned state of the floss yarn 4 can be easily and surely maintained. Further, when the life of the floss yarn 4 is exhausted, only the floss yarn 4 can be removed from the holding and fixing section and replaced with a new floss yarn 4.
Etc. can be continuously used as they are, so that it is not necessary to replace the floss attachment 2, the holder and the like as in the conventional case.

[0011]

【Example】

(Example 1) The dental floss 1 used in this example is
As shown in FIG. 1, the floss attachment 2 is provided with a U-shaped floss holder 3 formed therein. The floss holder 3 is composed of a pair of U-shaped holding pieces 6 and 6 which opens and closes around the hinge portion 5 as an axis, and each of the holding pieces 6 has a locking projection 9 projecting from its tip. , The other clamping piece 6
A guide groove 7 into which the floss yarn 4 is inserted and a fitting recess 8 into which the locking projection 9 is fitted are formed on the respective tip sides of the. The fitting recess 8 and the locking projection 9 are formed by the pair of holding pieces 6, 6 described above.
Can be engaged with each other to close and hold the floss thread 4 and maintain its tensioned state. Moreover, when opening the holding pieces 6 and 6, the locking projection 9 can be easily detached from the fitting recess 8. The floss attachment 2 is formed into a shape and a size, and functions as a holding and fixing portion of the floss attachment 2. In the above structure, the guide groove of the one holding piece 6 shown in FIG.
7 is fitted with the floss thread 4 and the other holding piece 6 is folded, and the locking projection 9 of the holding piece 6 is inserted into the one fitting recess 8
By snapping it into the snap ring, the floss thread 4 can be easily and reliably sandwiched between the fitting recess 8 and the locking projection 9.
The floss thread 4 can be easily stretched. In addition, when the life of the floss yarn 10 is exhausted, as shown in FIG. 2B, the holding pieces 6 and 6 are opened and the fitting recess 8 is formed.
The floss yarn 4 can be easily removed only by detaching the locking projection 9 from, and the floss yarn 4 can be easily replaced, and the floss holder 3 of the floss attachment 2 can be continuously used. As a result, it is not necessary to replace the floss attachment, the holder, and the like as in the conventional case, and it is possible to reduce costs and industrial waste. Further, since it is not necessary to provide retaining ball portions for preventing slippage at both ends of the floss yarn 4, there is an advantage that the floss yarn 4 does not need to be manufactured.

As a modified example of the holding pieces 6 and 6, as shown in FIG. 3, the floss holder 3 is integrally formed with one holding piece 6 having a guide groove 7 and a fitting recess 8. The other sandwiching piece 6 provided with the protrusion 9 is separated from the one sandwiching piece 6, and the sandwiching pieces 6 and 6 are connected to and detached from each other by attaching and detaching the fitting recess 8 and the locking protrusion 9. It may be.
In this case, the hinge portion 5 of FIG. 1 is not necessary, and the structure of the floss attachment 2 can be simplified. (Embodiment 2) In this embodiment, as shown in FIGS. 4 (a) to 4 (c), a pair of sandwiching pieces 6 provided on the floss attachment 2 are rotatably supported in a scissor shape, and are thin. It is provided with a pair of sandwiching and fixing portions 6a for sandwiching the floss yarn 4 on one side across the fulcrum portion 10 and a pair of scissors portions 6b for the other side. Therefore, as shown in FIGS. 4A and 4B, the floss yarn 4 can be easily clamped by closing the pair of clamping and fixing portions 6a, and as shown in FIG. By closing 6b, the holding and fixing portion 6a can be opened and the floss yarn 4 can be removed. By using this principle to attach and detach the floss thread 4, the fitting recess 8 and the locking projection 9 shown in FIG. 1 are unnecessary, and the structure of the floss holder 3 can be simplified. is there. (Embodiment 3) In this embodiment, as shown in FIG. 5, a deep groove 11 for winding the floss thread 4 is formed in the center of the outer peripheral surface of the U-shaped floss holder 3 of the floss attachment 2. Through-holes 12 through which both ends 4a of the floss yarn 4 penetrate are formed in the central portion of the vertical piece 3a of the floss holder 3, and sandwiching holes 14 are formed on both sides of the through-hole 12. In addition, a comb-shaped pressing member 13 is inserted into the through hole 12. When the floss yarn 4 is stretched on the floss holder 3, the floss holder 3
Prepare the floss yarn 4 which is slightly longer than the length of one round of the outer circumference of the. Then, with the one end portion 4a of the floss yarn 4 inserted in the through hole 12 of the floss holder 3, the floss yarn 4 is made to go around the deep groove 11 on the outer periphery of the floss holder 3 and is bridged to the front end side of the floss holder 3, and The other end 4b of the floss yarn 4 is inserted into the through hole 12. After that, the floss yarn 4 can be maintained in a stretched state by inserting the central protrusion 13a and the both-side protrusions 13b of the pressing member 13 into the through hole 12 and the both holding holes 14, respectively. Further, since the press fitting 13 can be attached to and detached from the floss holder 3, the floss yarn 4 can be attached and detached very easily as in the above-described embodiments. (Embodiment 4) In this embodiment, as shown in FIGS. 6 (a) and 6 (b), the floss attachment 2 is separated into a floss holder 3 and a floss tip 2a, and a protrusion is provided at the lower end of the floss holder 3 so as to project therefrom. The portion 15 is detachably provided in a guide groove 16 formed in the upper end of the floss tip 2a. Therefore, the both ends 4a and 4b of the floss yarn 4 are connected to the floss holder 3
The protrusion 15 of the floss holder 3 is temporarily fixed by twisting it on the protrusion 15 of the floss tip 2a in this state.
The both ends 4a and 4b of the floss yarn 4 can be clamped in the gap between the guide groove 16 and the protrusion 15 by simply pushing the floss yarn 4 into the gap. (Embodiment 5) In this embodiment, as shown in FIG. 7, a pair of wedge-shaped holding and fixing pieces 21 are formed at each tip of the floss holder 3, and a notch 20 is formed on the outer surface of each holding / fixing piece 21. Are provided respectively. Therefore, the floss yarn 4 is sandwiched between the pair of holding and fixing pieces 21, and the U-shaped pressing metal fitting 22 is fitted to the outside of the holding and fixing piece 21. At this time, the U-shaped holding metal fittings 22 are attached to the protrusions 2 on the respective tip sides.
Clamping force is applied from 2a to the inside, and the floss thread 4 mounted between the wedge-shaped clamping and fixing pieces 21 can be mounted and removed with one touch using the pressing metal fitting 22. (Embodiment 6) In this embodiment, as shown in FIG. 8, a U-shaped floss holder 3 is hinge-coupled to an L-shaped stator 30 and an upper end of the stator 30 via a pivot 25. The floss yarn 4 is guided by a guide groove 33 formed along the outer circumference of the rotator 31, and the tip portion 4a of the floss yarn 4 is fixed to the stator 30. The contact surfaces 30a and 31a of the rotary member 31 and the rotary member 31 sandwich and fix them. Contact surfaces 3 of the rotor 31 and the stator 30 respectively
0a and 31a are formed in a V shape, both contact surfaces 30a and 31a are in a fitted state when the rotator 31 is upright, and both members 30 are rotated when the rotator 31 is rotated. , 31
By the elastic force of, the rotator 31 can be rotated by overcoming the undulations of both contact surfaces 30a and 31a. Then, when the floss yarn 4 is stretched, as shown in FIG. 9 (b), first, the base end portion 4b of the floss yarn 4 is bound and fixed to the floss attachment 2, and then the rotator 31 is placed on the right side. The floss yarn 4 is wound around the guide groove 33 of the rotator 31, and the tip 4a of the floss yarn 4 is placed in the gap between the contact surfaces 30a and 31a of the rotator 31 and the stator 30. Pass through.
Next, when the rotator 31 is returned to the left, as shown in FIG. 9A, the loose floss yarn 4 is pulled while the rotator 3 is rotated.
The contact surfaces 30a and 31a of the stator 1 and the stator 1 are fitted to each other, and the tip portion 4a of the floss yarn 4 is clamped and fixed between the contact surfaces 30a and 31a. Therefore, the floss yarn 4 can be easily stretched around the floss holder 3 without slack, and the floss yarn 4 can be easily removed only by rotating the rotator 31 to the right.

As a modification of FIG. 8, as shown in FIG. 10, both contact surfaces 30 of the rotary member 31 and the stator 30 are shown.
The metal members 40 may be fixed to the a and 31a by insert molding, respectively. In this case, there is an advantage that abrasion of both contact surfaces 30a and 31a due to repeated attachment and detachment of the floss yarn 4 can be prevented. Furthermore, FIG.
As a modified example of 0, as shown in FIGS. 11 and 12, the edge portion of the metal member 40 is formed into a sharp edge 41,
The contact surfaces 30a and 31a of the both metal members 40 form the floss thread 4
By pulling the front end portion 4a of the floss yarn 4 in the direction of the arrow in FIG. 11 while sandwiching the pin, there is an advantage that the floss yarn 4 can be easily cut with a small force by the sharp edge 41. (Embodiment 7) In this embodiment, as shown in FIG.
A guide groove 45 for the floss yarn 4 is formed along the outer periphery of the upper portion of the floss holder 3, and a wedge member 46 is slidably fitted in the guide groove 45. When mounting the floss thread 4 in the guide groove 45, as shown in FIG.
As shown in (a), the wedge member 46 and the guide groove 4
5 and a floss thread 4 is inserted into this gap. Next, by holding the operation portion 46a of the wedge member 46 and sliding it to the right, as shown in FIG. 14B, the floss yarn 4 can be clamped and fixed by the wedge member 46 and the guide groove 45. it can. Further, the floss yarn 4 can be taken out from the guide groove 45 only by returning the wedge member 46 to the left. Therefore, the floss yarn 4 can be easily attached and detached only by the sliding operation of the wedge member 46. (Embodiment 8) In this embodiment, as shown in FIGS. 15 (a) to 15 (d), an outer screw 50 is engraved on the lower end portion of the floss attachment 2, and the outer screw 50 has an annular cap 5
The inner thread 52 of No. 1 is screwed freely, and the guide groove 45 of the floss yarn 4 is formed from the upper portion of the floss holder 3 along the outer surface of the floss attachment 2. Also,
The guide groove 45 is not formed on the outer thread 50 of the floss attachment 2 and therefore the floss thread 4 is fastened between the outer thread 50 and the inner thread 52. When the floss yarn 4 is stretched, first, the base end portion 4b of the floss yarn 4 is fixed to the recess 52 provided in the lower portion of the floss holder 3 by binding or winding, and then the floss yarn 4 is guided along the guide groove 45. Floss thread 4
The front end portion 4a of the floss attachment 2 is pulled out to the lower end side. Next, attach the cap 51 to the floss attachment 2
Is inserted from the lower end side and the inner thread 52 of the cap 51 is tightened to the outer thread 50 while the floss thread 4 is pulled. As a result, the floss yarn 4 can be screwed between the floss attachment 2 and the cap 51 and held in a tensioned state. Further, the floss yarn 4 can be collected only by removing the cap 51. In this way, floss attachment 2
The floss yarn 4 can be stretched by using the screwing of the cap 51, and the tension degree of the floss yarn 4 can be easily adjusted depending on the degree of tightening of the cap 51. (Embodiment 9) This embodiment shows an example in which the dental floss 1 according to the present invention is attached to an electric toothbrush 60. FIG.
As shown in (a) to (c), the electric toothbrush 60
The drive shaft 61 has a concave groove 62 for winding the floss yarn 4.
Is formed, and a fitting hole 64 into which the tip end side of the drive shaft 61 is fitted is formed at the lower end portion of the floss attachment 2. Reference numeral 45 is a guide groove for the floss yarn 4. When the floss yarn 4 is stretched, first, the base end 4b of the floss yarn 4 is wound around the concave groove 62 of the drive shaft 61 shown in FIG.
Is fitted to the drive shaft 61 of the electric toothbrush 60 to connect the dental floss 1 to the electric toothbrush 60. At this time, the base end 4b side of the floss yarn 4 is clamped and fixed by the connecting portion of the floss attachment 2 and the drive shaft 61. And FIG.
As shown in FIG. 6 (b), the floss thread 4 is guided to the guide groove 4 extending from the floss attachment 2 to the outer circumference of the floss holder 3.
5 is stretched, and finally, as shown in FIG. 16A, the tip end portion 4a of the floss yarn 4 is bound and fixed in the recess 52 of the floss holder 3. As described above, when the dental floss 1 according to the present invention is attached to the electric toothbrush 60, the floss yarn 4 can be stretched at the same time, and the versatility of the dental floss 1 according to the present invention is enhanced.

As a method of using the dental floss 1 mounted on the electric toothbrush 60, the drive shaft 6 shown in FIG.
By driving the electric toothbrush 60 while the floss attachment 2 is connected to 1, the reciprocating linear motion of the drive shaft 61 is used to reciprocally drive the floss thread 4 to obtain the effect of removing plaque. .. As another example,
As shown in FIG. 18, the floss attachment 2 may be manually driven to clean the gap between the teeth with the floss thread 4. In this case, the operation of the floss yarn 4 can be easily controlled by hand to efficiently clean the teeth.

[0015]

As described above, according to the first aspect of the present invention, the floss attachment is provided with the pinch-fixing portion, and the floss thread is removably pinched by the pinch-fixing portion. The tensioned state of the floss yarn can be easily and surely held only by holding it by the holding and fixing portion. Also,
When the life of the floss yarn is exhausted, only the floss yarn can be removed from the clamping and fixing section and replaced with a new floss yarn, and the floss holder etc. can be used continuously as it is, reducing costs and reducing industrial waste. Can be planned.

According to the second aspect of the present invention, the floss attachment is composed of a floss tip and a floss holder, and the floss thread can be sandwiched between the floss tip and the floss holder. By simply inserting the floss yarn between the and the floss holder and pushing the floss holder into the floss tip, the tensioning of the floss yarn becomes easy.

According to the third aspect of the present invention, the holding and fixing portion of the floss attachment has a pair of holding pieces for holding the floss yarn, and each holding piece can be fastened by a wedge-shaped press fitting. Therefore, the floss yarn can be easily fixed with one touch. According to the fourth aspect of the present invention, the holding and fixing portion of the floss attachment includes a hinge-coupled stator and a rotor, and a floss thread is provided between both contact surfaces of the stator and the rotor. Since it is configured so as to be detachably clamped, the floss yarn can be easily stretched without sagging.

According to the fifth aspect of the present invention, the wedge fixing member of the floss attachment is slidably mounted along the guide groove of the floss thread, and the wedge member is slid in a direction of tightening the wedge member. Since the floss yarn is sandwiched between the member and the guide groove,
The floss yarn can be easily attached and detached only by sliding the wedge member.

According to the sixth aspect of the present invention, since metal members are insert-molded on both the contact surfaces of the stator and the rotor, wear of both contact surfaces is prevented even if the floss thread is repeatedly attached and detached. it can. According to the invention of claim 7, a blade portion is provided on the metal member, and the cut-off portion of the floss yarn sandwiched between the metal members can be cut by the blade portion. It can be easily cut.

According to an eighth aspect of the present invention, the holding and fixing portion of the floss attachment includes an outer screw formed on the floss attachment and a cap having an inner screw that can be screwed into the outer screw. Since the floss thread is sandwiched between the screw and the inner thread, the floss thread can be easily stretched by using the screw fastening between the cap and the floss attachment, and the tension of the cap can be used to stretch the floss thread. The setting can be easily adjusted.

According to a ninth aspect of the present invention, the floss attachment is detachably connected to the electric toothbrush, and the floss thread is sandwiched between the connecting parts of the floss attachment and the electric toothbrush. When the dental floss according to the invention and the electric toothbrush are connected, the tensioned state of the floss yarn can be maintained. According to the tenth aspect of the present invention, the holding and fixing portion of the floss attachment has a pair of holding pieces that can be opened and closed about a fulcrum, and each of the holding pieces is opened and closed at a portion behind the fulcrum. Because of the structure, the floss yarn can be attached and detached by opening and closing the holding piece, and the tensioning of the floss yarn is also easy.

[Brief description of drawings]

FIG. 1 is a perspective view of a dental floss used in a first embodiment of the present invention.

FIG. 2 is a perspective view showing a state in which the pair of hinge-engaged sandwiching pieces in the above-mentioned floss holder are hingedly opened, and FIG. 2 (b) is a cross-sectional view showing a closed state.

FIG. 3 is an exploded perspective view showing a modified example of the above-mentioned sandwiching piece.

FIG. 4 shows a floss attachment used in the second embodiment of the present invention, (a) is a perspective view, (b) is a perspective view,
(C) is a cross-sectional view showing a state in which the floss yarn is mounted.

FIG. 5 is a perspective view showing a floss attachment used in a third embodiment of the present invention.

FIG. 6 shows a floss attachment used in a fourth embodiment of the present invention, (a) is an exploded perspective view, and (b) is a side view of a floss holder.

FIG. 7 is a perspective view showing a floss attachment used in a fifth embodiment of the present invention.

FIG. 8 is a perspective view showing a floss attachment used in a sixth embodiment of the present invention.

FIG. 9 is a front view showing the operating state of FIG. 8, in which (a) shows a state in which the floss yarn is clamped, and (b) is a front view showing a state in which the floss yarn is wound.

10 is a perspective view showing a configuration in which a metal member is insert-molded in the floss attachment of FIG.

11 is a perspective view showing a configuration in which a blade portion is provided on the metal member of FIG.

FIG. 12 is a partially enlarged perspective view of the vicinity of the blade of FIG.

FIG. 13 is a perspective view showing a floss attachment used in a seventh embodiment of the present invention.

14 is a plan view showing a state where the floss yarn is slackened, and FIG. 14 (b) is a plan view showing a state where the floss yarn is clamped.

FIG. 15 shows a floss attachment used in an eighth embodiment of the present invention, (a) is a perspective view of the whole, (b) is a partial front view of the floss holder, (c) is a partial side view of the floss holder, (D) is a partial cross-sectional view showing a screwed state of the floss attachment and the cap.

FIG. 16 shows a floss attachment used in a ninth embodiment of the present invention, (a) is a partially cutaway front view, (b) is a partial side view of the floss holder, and (c) is a wound state of the floss yarn. It is a partial perspective view shown.

FIG. 17 is an exploded perspective view showing a state in which the dental floss of the present invention is attached to an electric toothbrush.

FIG. 18 is a perspective view showing a state in which the dental floss of the present invention is manually operated.

[Explanation of symbols]

 1 Dental floss 2 Floss attachment 2a Floss tip 3 Floss holder 4 Floss thread 6 Clamping piece 13 Holding metal fitting 10 Support point 22 Holding metal fitting 40 Metal member 41 Blade portion 45 Guide groove 46 Wedge member 50 External screw 51 Internal screw 60 Electric toothbrush

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masayuki Mitsui 1048, Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Works Co., Ltd. (72) Inventor, Mikio Ito 1048, Kadoma, Kadoma City, Osaka

Claims (10)

[Claims] 1. A dental floss in which a floss attachment is provided with a pinch-fixing part, and a floss thread is removably pinched by the pinch-fixing part. 2. The dental floss according to claim 1, wherein the floss attachment comprises a floss tip and a floss holder, and the floss thread can be pinched by a connecting portion of the floss tip and the floss holder. 3. The holding / fixing portion of the floss attachment has a pair of holding pieces for holding the floss yarn, and each holding piece can be fastened by a wedge-shaped press fitting. Item 1. The dental floss according to Item 1. 4. The pinching and fixing part of the floss attachment comprises a hinged stator and a rotator, and removably clamps the floss yarn between both contact surfaces of the stator and the rotator. The dental floss according to claim 1, wherein: 5. A sandwich member of the floss attachment is slidably mounted along a guide groove of the floss thread, and the wedge member is slid in a direction of tightening the wedge member so as to be interposed between the wedge member and the guide groove. The dental floss according to claim 1, wherein a floss thread is sandwiched. 6. The dental floss according to claim 4, wherein metal members are insert-molded on both contact surfaces of the stator and the rotator. 7. The dental article according to claim 6, wherein a blade portion is provided on the metal member, and the cut-off portion of the floss yarn sandwiched between the metal members can be cut by the blade portion. Floss. 8. The holding / fixing portion of the floss attachment includes an outer screw formed on the floss attachment and a cap having an inner screw that can be screwed into the outer screw, and the floss is interposed between the outer screw and the inner screw. The dental floss according to claim 1, wherein a thread is sandwiched. 9. The dental floss according to claim 1, wherein the floss attachment is detachably connected to the electric toothbrush, and the floss thread is sandwiched between the connecting portions of the floss attachment and the electric toothbrush. 10. The dental floss according to claim 1, wherein the holding and fixing portion of the floss attachment has a pair of holding pieces that can be opened and closed about a fulcrum, and each holding piece is opened and closed behind the fulcrum. ..