CN118055741A - Dental floss holder and cleaning device for interdental cleaning - Google Patents

Abstract

A dental floss holder (1) is proposed. The dental floss holder (1) comprises a main body (2) having a front end (2.1) and a rear end (2.2). The body (2) comprises two arms (3; 4) which extend with their longitudinal extension between the front end (2.1) and the rear end (2.2) and are connected by a rotational joint (5) and are constructed with a bending elasticity in a longitudinal section between the rotational joint (5) and the front end (2.1). In the region of the front end (2.1), the arms (3; 4) are spaced apart from one another by a distance (6) with respect to the initial rotational position (A). In the region of the front end (2.1), the arms (3; 4) have fastening points (3.1; 4.1) for dental floss (50) in order to span the distance (6) between the arms (3; 4) by means of the dental floss (50). With respect to an initial rotational position (A), the arms (3; 4) extend separately from the rotational joint (5) to the rear end (2.2). A cleaning device (100) for interdental cleaning is also proposed, comprising such a dental floss holder (1).

Description

Dental floss holder and cleaning device for interdental cleaning

The present invention relates to a dental floss carrier and a cleaning device for interdental cleaning having such a dental floss carrier.

Dental floss is commonly used to clean the tooth spaces. To insert the floss into the tooth space, the floss pieces of the floss are in practice slightly tensioned. This may be done by the floss being pulled taut between the two fingers. Or a special holder may be used on which the dental floss is held in a corresponding manner.

In order to clean the tooth space, dental floss must be threaded into the tooth space. Typically, for this purpose a wire element which is pulled in a holder or between two fingers is pressed from the topside of the tooth into the tooth space and then moved back and forth in the plane of the tooth space to remove possible food residues or plaque. This places the floss under mechanical stress which causes some elongation of the length of the wire member, so that the floss is no longer held in tension in the desired manner. Thus, reuse of the wire member is not generally achieved. At least in the case of re-use of the wire, cleaning of the tooth gap becomes difficult and/or the cleaning action is adversely affected.

The task can be to propose at least one possible way that this can be improved. In particular, a possible way of compensating for the length extension of dental floss should be proposed.

This object is achieved by a dental floss holder having the features of claim 1. To accomplish this task, a cleaning device having the features of claim 13 is also proposed. Advantageous embodiments and/or designs and/or aspects emerge from the dependent claims, the following description and the figures.

According to one aspect, a dental floss holder is provided. The dental floss holder includes a body having a front end and a rear end. The body comprises in particular two arms extending between the front end and the rear end, for example with their longitudinal extension. The arms extend side by side, in particular in the longitudinal extension thereof. In particular, the two arms are connected to each other. The arms are connected to each other, in particular by means of a revolute joint. For example, the arms can be turned relative to each other about the rotation axis by means of a swivel joint.

In particular, it is provided that at the front end the arms are at a distance from each other with respect to the initial rotational position. In particular, it is provided that in the front end region the arms have a fastening point, in particular a fastening point for dental floss, in order to span the distance between the arms by means of dental floss.

In particular, it is provided that in the initial rotational position the arm forms a C-shape between the front end and the rear end or at least between the front end and the rotational joint. In particular, the term "C-shaped" as used herein encompasses V-shapes and U-shapes. It is preferred that the arms are fork-shaped, which can be achieved by a C-shape. This allows the floss on the floss carrier to be more easily introduced into the bottom of the tooth space and in that position a sufficient back and forth movement of the floss between the arms of the floss carrier can be performed.

In one embodiment, it is provided that, in relation to the initial rotational position, the arm extends separately from the rotational joint to the rear end. The arms can thereby be moved in rotation relative to one another in such a way that the arms are separated at the front end by a folding movement of the arms at the rear end. This effect is advantageous in that the floss at the front end is kept pretensioned between the arms for a long period of time.

In another embodiment, the arm is designed to be bending-resilient in the longitudinal section between the revolute joint and the front end. The measures aim at being able to use the restoring force from the bending elastic deformation of the arms to hold the floss in a pretensioned state.

In one embodiment, the arm has a first longitudinal extension between the anterior end and the revolute joint and a second longitudinal extension between the revolute joint and the posterior end. In particular, the first longitudinal extension is greater than the second longitudinal extension. For example, the first longitudinal extension is at least twice larger than the second longitudinal extension. An advantageous leverage ratio is thereby achieved in order to obtain a sufficient increase of the arm distance at the front end with a slight decrease of the arm distance at the rear end.

If the arms are designed to be curved elastically in the longitudinal section between the rotational joint and the front end, an advantageous leverage ratio is achieved in this way, so that with a slight reduction of the arm spacing at the rear end a sufficiently large curved elastic deformation of the arms is obtained, which in turn allows the desired floss re-tensioning effect.

In particular in the rear end region, the arms are at a distance from each other with respect to the initial rotational position. In one embodiment, for example, it is provided that the distance is formed by a cutout in the body. This facilitates a technically simple and/or cost-effective machining of the arm in the rear end region. For example, the incision is created by material hollowing.

The dental floss carrier may for example have the property of enabling the revolute joint to perform a joint function, which is achieved by material deformation, in particular elastic material deformation. This facilitates simple and/or low cost processing.

When the revolute joint according to one embodiment has or consists of a body material portion connecting the arms, it is also advantageous for a technically simple and/or low-cost machining of the revolute joint. This object is also addressed by the measure that according to another embodiment the material part is integrally formed at the arm and/or integrally connected to the arm. The material part is preferably elastically deformable, for example, in order to perform the joint function of a revolute joint.

Another embodiment or other embodiments may be where the revolute joint is or includes a hinge. For example the hinge is a film hinge. The measures also aim to be able to process dental floss holders as simply and/or cost-effectively as possible.

In a further embodiment, in the rear end region, the arms have a thickening or bulge on both sides facing away from each other. Provision is thereby made for locking the dental floss in a locking manner when the dental floss is received in the associated receptacle of the holding body. The thickened portion may be used as an integral part of a limit lock mechanism or locking mechanism.

When the dental floss holder or the body of the dental floss holder according to another embodiment is a plastic piece, a technically simple and/or low-cost manufacturing is allowed. Thus also providing hygienic advantages. Such dental floss holders are in principle proposed for use as disposable articles.

For example, the plastic part has or consists of a hard plastic. For example, the plastic part has or consists of thermoplastic. For example, the plastic part has or consists of a thermoplastic terpolymer. For example, the plastic part is such a plastic part made of ABS or has such a material. The term "ABS" refers to acrylonitrile-butadiene-styrene copolymers. For example, the plastic part has polypropylene (PP) or is composed of polypropylene.

According to another aspect, a dental floss holder, in particular a dental floss holder of the above-mentioned type or of the above-mentioned type, is proposed together with dental floss held thereon. The length of wire, such as floss, is held on the floss carrier. A piece of wire, such as floss or floss, is secured to the fixed points of the arms and spans the distance between the arms. For example, floss is held on the arm in a manner that may or may not be separable. For example, floss is clamped to the arm. For example, floss is poured or molded into the arm.

By means of the above-described floss holder and the floss secured thereto, a unit is provided by which an automatic re-tensioning of the floss is achieved when the floss carrier is received in the relevant receptacle of the holding body in such a way that the arms are moved together at the rear end and held in said position. If the arm is designed to be flexurally elastic, the arm is thus in a flexurally elastic deformation. In the case of a length extension of the floss, the deformed arms undergo a restoring movement, whereby the length extension of the floss can be compensated to some extent, so that the floss is kept tensioned between the arms.

According to another aspect, a cleaning device for interdental cleaning is presented. The cleaning device comprises a dental floss holder of the above-mentioned type or a dental floss holder of the above-mentioned type and a holding body, on which the dental floss holder is held. The floss is especially secured at the attachment points of the floss carrier.

In one possible embodiment, the holding body comprises a receptacle having two opposite side walls at a distance from each other. The back end of the dental floss holder is in particular accommodated in the receptacle. In particular, the arms of the dental floss holder rest against the side walls of the receptacle. The distance between the side walls is in particular dimensioned such that the floss is tensioned under the bending elastic pretension or deformation of the arms.

In a further embodiment, the dental floss carrier is designed in the manner described above, whereby in the rear end region the arms have thickened portions on two sides facing away from each other. In this case, for example, the receptacle of the holder has an undercut, against which the arm rests with its thickening. Thereby effecting a lock to prevent the dental floss holder from being disengaged from the holding body. By means of the thickening and the associated undercut, it is still possible to allow the thickening to pass over the undercut and to remove the dental floss holder from the holder by applying a corresponding separating force.

In one possible embodiment, the cleaning device comprises a main body having an elongated extension in the direction of the longitudinal axis. The retaining body is arranged in particular in the region of one longitudinal side end of the main body. Preferably, the cleaning device comprises a drive element for driving the holding body, wherein the drive element is mounted, for example, rotatably about the rotational axis.

The cleaning device preferably comprises a transmission mechanism which is arranged between the drive element and the holding body and is provided for placing the holding body in a rotary back-and-forth movement about a longitudinal axis or a displacement axis extending parallel thereto and/or in a translational back-and-forth movement transverse to the longitudinal axis or the displacement axis relative to the main body in order in particular to move the dental floss in the plane formed by the tooth gaps.

The cleaning device is for example at least one embodiment of the cleaning device described in the german patent application 10 2021 120 284.1. Reference is made to said patent application, the disclosure of which is hereby incorporated by reference.

Further details and features come from the following description of two embodiments with reference to the figures, in which:

figure 1 shows one possible embodiment of a dental floss holder in a perspective view from above,

Figure 2 shows the dental floss holder of figure 1 mounted on a holding body in a top view,

Figure 3 shows in perspective view the dental floss holder and the holding body according to figure 2,

Figure 4 shows in cross-section the dental floss holder and the holding body according to figure 2,

Figure 5 shows in perspective view one possible embodiment of a cleaning device for interdental cleaning with the embodiment of the dental floss holder according to figure 1,

Fig. 6 shows the cleaning device of fig. 5 in a front view.

Fig. 1 shows in a schematic representation a perspective view from above of one possible embodiment of a dental floss holder 1. The dental floss holder 1 comprises a main body 2 having a front end 2.1 and a rear end 2.2. The body 2 comprises two arms 3, 4 extending with their longitudinal extension or their respective longitudinal extension between a front end 2.1 and a rear end 2.2. For example, the arms 3, 4 have a polygonal cross-section, such as a tetragonal cross-section. The arms 3, 4 preferably extend side by side in the direction of their longitudinal extension. The arms 3, 4 are preferably interconnected. The arms 3, 4 are preferably interconnected by a revolute joint 5. The arms 3, 4 can be rotated or pivoted relative to each other about a rotation axis (not shown in fig. 1), for example by means of a revolute joint 5.

At the front end 2.1, the arms 3, 4 are preferably spaced apart from each other by a distance 6 relative to the initial rotational position a. In the region of the front end 2.1, the arms 3, 4 preferably have a fastening point 3.1, 4.1, respectively, for the dental floss 50. In fig. 1, the floss 50 or a wire segment of floss 50 is for example fixed at a fixing point 3.1, 4.1 and spans the distance 6 between the arms 3, 4. For example, the dental floss 50 or the thread segments are fastened, for example melted or welded, to the fastening points 3.1, 4.1 in an inseparable manner. In principle, the dental floss 50 or wire segments can also be fastened in a detachable manner. In this case, for example, the dental floss 50 or the thread segments are held clamped at the fastening points 3.1, 4.1, for example in one or in each case in one receptacle.

The arms 3, 4 can be bent in the longitudinal extension thereof. For example, the arms 3, 4 are bent opposite each other, in particular outwardly, at least in the longitudinal section between the front end 2.1 and the pivot joint 5. For example, the arms 3, 4 form a C-shape at least between the front end 2.1 and the revolute joint 5. The revolute joint 5 is preferably located on the symmetry axis S of the body 2. The arms 3, 4 and their longitudinal extension preferably extend mirror symmetrically with respect to the symmetry axis S. The symmetry axis S is preferably the central axis of the body 2.

The arms 3, 4 preferably extend apart from the pivot joint 5 to the rear end 2.2 with respect to the initial pivot position a. By means of the swivel joint 5, the arms 3, 4 are thereby allowed to swivel relative to each other in such a way that the arms 3, 4 are separated at the front end 2.1 by a folding movement of the arms 3, 4 at the rear end 2.2. This action is currently used to keep the floss 50 at the front end 2.1 in a pre-tensioned state between the arms 3, 4 for a long period of time. Preferably, the arms 3, 4 are designed to be bending-elastic for this purpose between the revolute joint 5 and the front end 2.1. Whereby when the arms 3, 4 are moved together at the rear end 2.2, with the floss 50 already tensioned, a bending elastic deformation occurs in the area between the revolute joint 5 and the front end 2.1. The energy accumulated in the bending deformation may be used to keep the floss 50 in a pre-tensioned state.

The longitudinal extension of the arms 3, 4 between the front end 2.1 and the revolute joint 5 is preferably longer, for example twice as long, than the longitudinal extension of the arms 3 and 4 between the revolute joint 5 and the rear end 2.2. An advantageous leverage ratio is thereby obtained in order to obtain a sufficiently large bending elastic deformation of the arms 3, 4 in the region between the rotational joint 5 and the front end 2.1 with a slight decrease in the distance of the arms 3, 4 at the rear end 2.2, in order to achieve the desired re-tensioning effect of the dental floss 50.

In the region of the rear end 2.2, the arms 3,4 can be formed by cutouts 7 in the body 2. For example, the cutout 7 has a V-shape. The tip of e.g. a V-shaped incision 7 is directed towards the revolute joint 5.

The revolute joint 5 preferably performs a joint function achieved by deformation of the material. The arms 3, 4 are preferably rotatable or pivotable relative to each other by means of a joint function. The revolute joint 5 may be formed by a material portion 8 of the body 2 connecting the arms 3, 4. For example, the material portion 8 may be elastically deformed. For example, the material portion 8 is integrally formed at the arms 3, 4. For example, the material portion 8 and the arms 3, 4 are integrally formed in one piece. For example, the material part 8 has a longitudinal extension in the region of the rear end 2.2 or an extension along the longitudinal extension of the arms 3, 4, which is set or formed by the depth of the cutout 7.

The extension or longitudinal extension of the material portion 8 is preferably dimensioned such that the arms 3, 4 have a sufficient rotatability with respect to each other such that a sufficient elastic deformation of the arms 3, 4 is allowed and thereby a sufficient re-tensioning effect is provided to the floss 50. In principle, the rotary joint 5 can be designed as a hinge. In principle, the material portion 8 may be a film hinge.

The dental floss holder 1 or body 2 is preferably manufactured in one piece. The dental floss holder 1 or the body 2 is preferably a plastic piece. For example, the dental floss carrier 1 or the main body 2 has or consists of a hard plastic. For example, the dental floss carrier 1 or the body 2 has or is composed of a thermoplastic, such as a thermoplastic terpolymer. For example, the dental floss carrier 1 or the main body 2 has or consists of ABS plastic or PP plastic.

The dental floss carrier 1 or the main body 2 is preferably designed for engagement, such as a plug connection, with the holding body 10 in the region of the rear end 2.2. The holding body 10 is schematically shown by way of example in fig. 2, 3 and 4. Wherein the dental floss holder 1 in the mounted state on the holding body 10 is shown in different views (fig. 2 and 3) and in a cross-sectional view (fig. 4).

For example, the holder 10 has a receptacle 10.1 for receiving therein the rear end 2.2 of the dental floss holder 1, in particular the arms 3, 4 provided therein. The receptacle 10.1 preferably has side walls 10.2, 10.3 spaced from each other and in particular opposite to each other, against which the arms 3, 4 of the dental floss holder 1 abut when the rear end 2.2 of the dental floss holder 1 is received in the receptacle 10.1.

The distance between the side walls 10.2, 10.3 is preferably dimensioned such that in the mounted state of the dental floss holder 1 the arms 3, 4 are pivoted towards each other at the rear end 2.2 with respect to their initial rotational position a (fig. 1). Thereby, a pretensioning of the floss 50 is obtained under elastic deformation of the arms 3, 4 in the area between the front end 2.1 and the pivot 5. The pretension is preferably maintained even if the floss 50 undergoes a length extension, due to the return action caused by the elastically deformed arms 3, 4. Such length extension of the floss 50 may be caused by one or more interdental cleaning by the floss 50.

For example, the receptacle 10.1 is designed as a socket. For example, the receptacle 10.1 has an insertion opening 10.4, by means of which the dental floss holder 1 is inserted with its rear end 2.2 into the receptacle 10.1 in the direction of arrow 9. For example, the receptacle 10.1 has opposing wall portions 10.5, 10.6 in the region of the insertion opening 10.4, which extend toward one another from the insertion opening 10.4 and thus form a narrowed insertion slot. The wall sections 10.5, 10.6 are preferably designed as: in the mounted state of the dental floss carrier 1, the contour of the outer sides of the arms 3, 4 corresponds to the contour of the wall portions 10.5, 10.6 or substantially corresponds thereto (fig. 4).

The receptacle 10.1 may have undercuts 10.7, for example, to resist removal of the dental floss holder 1 from the receptacle 10.1. By means of the undercut 10.7, the dental floss holder 1 is, for example, difficult or even impossible to extract from the container holder 10.1 through the insertion opening 10.4. The undercut 10.7 can be formed by the side walls 10.2, 10.3 and/or the wall parts 10.5, 10.6 or can have side walls 10.2, 10.3 and/or wall parts 10.5, 10.6.

The dental floss holder 1 preferably has a thickening in the area of the rear end 2.2. The thickening is designed in particular for hooking behind the undercut 10.7 of the receptacle 10.1. The dental floss holder 1 is thus urged to be fixed against extraction from the container holder 10.1 by the thickening in cooperation with the undercut 10.7. For example, the thickening of the dental floss carrier 1 is realized by a thickening 3.2 or 4.2 on one of the arms 3, 4, respectively. For example, the respective thickening 3.2, 4.2 is formed in the region of the rear end 2.2 on the opposite sides of the arms 3, 4 from one another.

The holding body 10 can be designed spherically or at least partially spherically. For example, the insertion opening 10.4 is provided on a spherical or truncated outer peripheral portion of the holding body 10. For example, the holding body 10 is truncated at the top side 10.9 and/or above the receptacle 10.1. For example, the holding body 10 has a straight or substantially straight surface 10.8 in the truncated region. For example, the surface 10.8 is open or at least partially open towards the receptacle 10.1, so that the receptacle 10.1 can be at least partially seen, for example, from the top side 10.8. In principle, it can be provided that the surface 10.8 is covered by a cap 140 (fig. 5).

The holding body 10 may be connected to the handle portion (not shown in fig. 2-4) or be an integral part of the handle portion. The holding body 10 is connected to the handle part in this case, for example, in a motion-proof manner. In principle, the holding body 10 can be designed to be movable relative to the handle part. For example, to removably engage the holding body 10 to a base member such as the handle portion described above, the holding body 10 may have an extension 11. The extension 11 may be a collar or other extension having a circular or annular cross-section. For example, the extension 11 has a central axis M, which can be used as a rotation axis about which the holding body 10 rotates relative to the base element. For example, the central axis M extends coaxially with the symmetry axis S of the dental floss holder 1. In principle, the central axis M may also extend at an angle to the symmetry axis S of the dental floss holder 1.

Fig. 5 and 6 illustrate one possible embodiment of a cleaning device 100 for interdental cleaning in a perspective view (fig. 1) and a front view (fig. 2). The cleaning device 100 is used for cleaning a tooth space 600 between two adjacent teeth 500, 500'. The cleaning device 100 is suitable for use with the dental floss holder 1 of fig. 1. For example, in fig. 5 and 6, a dental floss holder 1 is shown as a component of a cleaning device 100, wherein dental floss 50 is held thereon as already shown in fig. 1 to 4.

The cleaning device 100 preferably includes a holder 110 on which the dental floss holder 1 is held. The holder 110 may be the holder 10 of fig. 2-4. In this regard, reference is made to the above description of the holder 10 with respect to the holder 110. The cleaning device 100 preferably includes a body 120 having an elongated extension in the direction of the longitudinal axis L. The holding body 110 is preferably arranged in the region of a longitudinal side end 120.1 of the main body 120.

The cleaning device 100 preferably comprises a drive member (not shown in fig. 5 and 6) for driving the holder 110. For example, the drive element is designed as a drive shaft. For example, the drive member is rotatably mounted about the rotation axis D. For example, the axis of rotation D lies on the longitudinal axis L of the body 120. For example, the body 120 is designed as a hollow body and the driver is accommodated therein.

The cleaning device 100 preferably includes a transmission mechanism (not shown in fig. 5 and 6). For example, a transmission is connected between the drive element and the holding body 110 and is provided for a rotary back-and-forth movement relative to the main body 120 about a displacement axis extending about or parallel to the longitudinal axis L and/or a translational back-and-forth movement transverse to the longitudinal axis L or the displacement axis for moving the dental floss 50 in the tooth gap 600.

The holder 110 is preferably movably held to the main body 120 by a connection portion 130. For example, the connection 130 is fixed to the holder 110 on the one hand and the main body 120 on the other hand. The connection 130 is preferably designed as a sleeve or tube or similar hollow body. For example, the connecting portion 130 is fitted over or supported by the extension 11 of the holder 10 (fig. 3) on the end side.

The connection 130 is preferably elastically deformable. The connection 130 is preferably connected, in particular rotationally fixed, to the holding body 110 and the main body 120 at the end face in such a way that a movement of the holding body 110 relative to the main body 120 takes place under elastic deformation of the connection 130. The connection 130 is preferably a soft plastic part and in particular an injection-molded part. The holder 110 may have a cap 140 composed of or having a soft plastic. For example, the cap 140 forms a circumferential portion of the holder 110.

The cleaning device 100 may be designed as an accessory to a handset. For example, the cleaning movement 100 has one or more joints for mechanical and/or force-transmitting engagement with the handpiece for this purpose in the region of the other longitudinal side end 120.2 of the main body 120. Such as the cleaning device 100 and the hand piece form an electric interdental cleaner. For example, the drive member of the cleaning device 100 is driven by the handset, in particular by the motor, to perform the desired movement of the holder 110 relative to the main body 120.

The cleaning device 100 may be the cleaning device 1 described in the german patent application 10 2021 120 284.1, the disclosure of which is incorporated into the present patent application.

List of reference numerals

1. Dental floss holder

2. Main body

2.1 Front end

2.2 Rear end

3. Arm

3.1 Fixed point

3.2 Thickening part

4. Arm

4.1 Fixed point

4.2 Thickening part

5. Rotary joint

6. Distance of

7. Incision

8. Material part

9. Arrows

10. Holder body

10.1 Receptacle base

10.2 Side wall

10.3 Side wall

10.4 Insertion opening

10.5 Wall portion

10.6 Wall portion

10.7 Undercut

10.8 Surface of the body

10.9 Topside of

11. Extension part

50. Dental floss

100. Cleaning device

110. Holder body

120. Main body

120.1 End of the device

120.2 End of the device

130. Connecting part

140. Cap with cap

500. Teeth

500' Tooth

600. Tooth gap

A initial rotational position

D axis of rotation

L longitudinal axis

M central axis

S symmetry axis

Claims (15)

1. Dental floss holder (1) comprising a main body (2) having a front end (2.1) and a rear end (2.2), said main body (2) comprising two arms (3; 4) extending with their longitudinal extension between said front end (2.1) and said rear end (2.2) and being interconnected by a rotational joint (5),

Wherein the arms (3; 4) are spaced apart from one another by a distance (6) in the region of the front end (2.1) with respect to an initial rotational position (A) and have fixing points (3.1; 4.1) for dental floss (50) in order to span the distance (6) between the arms (3; 4) by the dental floss (50),

Wherein the arm (3; 4) extends separately from the revolute joint (5) to the rear end (2.2) in relation to the initial rotational position (A), and

Wherein the arms (3; 4) are formed in a bending-elastic manner in a longitudinal section between the rotational joint (5) and the front end (2.1).

2. Dental floss holder according to claim 1, wherein the arm (3; 4) has a first longitudinal extension between the rotational joint (5) and the front end (2.1) and a second longitudinal extension between the rotational joint (5) and the rear end (2.2), and the first longitudinal extension is larger than the second longitudinal extension, in particular at least twice as large.

3. Dental floss holder according to claim 1 or 2, wherein the arms (3; 4) are spaced from each other in the region of the rear end (2.2) with respect to the initial rotational position (a) by a distance which consists of a cutout (7) in the main body (2).

4. Dental floss holder according to one of the preceding claims, wherein the rotational joint (5) performs a joint function by material deformation.

5. Dental floss holder according to one of the preceding claims, wherein the rotational joint (5) has or consists of a material portion (8) of the main body (2) connecting the arms (3; 4).

6. Dental floss holder according to claim 5, wherein the material portion (8) is elastically deformable.

7. Dental floss holder according to claim 5 or 6, wherein the material portion (8) is integrally formed on the arm (3; 4).

8. Dental floss holder according to one of the preceding claims, wherein the rotational joint (5) is or comprises a hinge, in particular a film hinge.

9. Dental floss holder according to one of the preceding claims, wherein in the initial rotational position (a) the arms (3; 4) form a C-shape between the front end (2.1) and the rear end (2.2).

10. Dental floss holder according to one of the preceding claims, wherein the arms (3; 4) have thickened portions (3.2; 4.2) on both sides facing away from each other in the region of the rear end (2.2).

11. Dental floss holder according to one of the preceding claims, wherein the main body (2) is a plastic piece, in particular has or consists of a hard plastic.

12. The dental floss holder (1) according to one of claims 1 to 11, having dental floss (50) retained thereon.

13. Cleaning device (100) for interdental cleaning, comprising a dental floss holder (1) according to one of claims 1 to 11, a dental floss (50) fixed to a fixing point (3.1; 4.1) of the dental floss holder (1), and a holding body (10; 110) on which the dental floss holder (1) is held.

14. Cleaning device according to claim 13, wherein the holder body (10; 110) has a receptacle (10.1) with two side walls (10.2; 10.3) facing one another at a distance from one another,

Wherein the rear end (2.2) of the dental floss holder (1) is received in the receptacle (10.1) and the arms (3; 4) of the dental floss holder (1) rest against the side walls (10.2; 10.3) of the receptacle (10.1), and

Wherein the distance between the side walls (10.2; 10.3) is dimensioned such that the dental floss (50) is tensioned under a bending elastic pretension of the arms (3; 4).

15. Cleaning device according to claim 14, wherein the dental floss holder (1) is constructed according to claim 10 and the receptacle (10.1) has an undercut (10.7) against which the arms (3; 4) of the dental floss holder (1) rest with their thickened portions (3.2; 4.2).