Field of the invention The present invention concerns a dental floss holder, and more particularly a dental floss holder not requiring the use of hands for flossing.

Background In the prior art, dental flossing requires the use of fingers to hold the dental floss, and/or a device comprising a dental floss holder and a handle for guiding the dental floss holder in the mouth of a user. A common problem or disadvantage connected with prior art methods of dental flossing is that the person flossing have to use one or both of his hands, and is thus prevented from performing other tasks, such as driving, while flossing. A further potential disadvantage is that the flossing is done with the mouth at least partially open, and this may in some settings be socially unacceptable.

Examples of typical prior art dental floss holders requiring a handle for guiding the dental floss holder in the mouth of a user are disclosed in US 4404978 and US 3106216.

An example of a replaceable dental floss holder for attachment to a separate handle for guiding the dental floss holder in the mouth of a user is disclosed in US

2180522.

The potential problems and/or disadvantages of the prior art methods and devices for flossing are some of the issues contributing to a non-regular or lacking use of dental floss. The goal of the present invention is to provide a dental floss holder which alleviates or avoids at least some of said problems and/or disadvantages.

Summary of the invention The present invention provides a dental floss holder which does not require the use of a handle, or fingers, to guide the dental floss in the mouth of a user. The floss holder according to the invention is defined by the appended claims and in the following: In one embodiment, the present invention provides a dental floss holder comprising a connecting section, and at least four floss supporting arms extending from said connecting section, each of the floss supporting arms has a first end and a second end, the first end is connected to, or is a part of, the connecting section, and the second end comprises a floss fastening portion for fastening a string of dental floss, wherein a string of dental floss attached to the floss fastening portions of the at least four floss supporting arms may be arranged to constitute the edges of a polyhedron.

The floss fastening portions are spaced apart such that a string, or strings, of dental floss may be fastened between at least three of said floss supporting arms before use. The string of dental floss between two floss supporting arms having a length making it suitable for being moved between adjacent teeth.

The connecting section may also be termed a hub, i.e. a body or member comprised by, or connected to, the first ends of the floss supporting arms.

In another embodiment of the dental floss holder according to the invention, each of the floss supporting arms are connected to each of at least two, preferably at least three, neighboring floss supporting arms by a string of dental floss attached to the floss fastening portions of the floss supporting arms.

In another embodiment of the dental floss holder according to the invention, the string of dental floss is spaced apart from the connecting section.

In another embodiment of the dental floss holder according to the invention, the second end of the floss supporting arms comprises a rounded surface. The rounded surface ensures that the dental floss holder is comfortable to have in the mouth by avoiding any sharp edges which may hurt or scratch the gums or palate.

In another embodiment of the dental floss holder according to the invention, the multiple strings of dental floss connecting the at least four floss supporting arms are arranged to constitute at least some of the edges of a polyhedron, such as a tetrahedron, a cube, an octahedron, a hexagonal prism and similar.

In another embodiment of the dental floss holder according to the invention, the connecting section is arranged within a volume delimited by the polyhedron formed by the multiple strings of dental floss.

In another embodiment of the dental floss holder according to the invention, the floss supporting arms are of a substantially equal length.

In another embodiment of the dental floss holder according to the invention, the string of dental floss is fastened to the fastening portion by any suitable means, such as by molding, melting, embedding, gluing, winding, tying or clamping. In another embodiment of the dental floss holder according to the invention, the holder is manufactured as one integrated unit by molding.

In another embodiment of the dental floss holder according to the invention, at least two strings of dental floss are aligned and arranged on opposite sides of the connecting section.

In another embodiment of the dental floss holder according to the invention, the floss supporting arms are joined together by a strengthening section.

In another embodiment of the dental floss holder according to the invention, the floss supporting arms extends from the connecting section to form a polygonal base of a polyhedron where the strings of dental floss form the faces of the polyhedron. For all embodiments, the distance between a string of dental floss and an outer surface of the connecting section should preferably be sufficient to allow the string of dental floss to pass between two adjacent teeth and touch the upper surface of the gum between said teeth. In another embodiment of the dental floss holder according to the invention, the strengthening section comprises a compressible material arranged in the space between the strings of dental floss, the floss supporting arms and the connecting section, such that the compressible material will help to push the strings of dental floss back out once inserted between adjacent teeth.

The term "polyhedron" is in the context of the present invention intended to comprise both various types of polyhedra and prisms.

Short description of the drawings

Embodiments of the present invention are illustrated by the following figures:

Fig. 1 is a perspective view of a first embodiment of a dental floss holder according to the invention.

Fig. 2 is a perspective view of a second embodiment of a dental floss holder according to the invention.

Fig. 3 is a perspective view of a third embodiment of a dental floss holder according to the invention. Fig. 4 is a perspective view of a fourth embodiment of a dental floss holder according to the invention.

Fig. 5 is a perspective view of a fifth embodiment of a dental floss holder according to the invention.

Figs. 6a-f show side views of alternative embodiments of floss supporting arms for a dental floss holder according to the invention. Fig. 7 is a perspective view of an embodiment with a compressible material shown in the space between the floss supporting arms.

Detailed description of embodiments of the invention

A first embodiment of a dental floss holder according to the invention is disclosed in Fig. 1. This specific embodiment has four floss supporting arms 1 , wherein each arm has a first end 2 and a second end 3. The first end 2 of each supporting arm 1 is joined to the connecting section 4 (or hub). In this embodiment, the connecting section is formed by the four first ends 2 joined, or connected together. At the second end 3, the supporting arms 1 feature a rounded surface 5 in the form of a knob 5 or ball. The rounded surface ensures that the dental floss holder is comfortable to have in the mouth by avoiding any sharp edges which may hurt or scratch the gums or palate. Each of the supporting arms 1 is connected to a neighboring supporting arm by a string of dental floss 6. In this particular embodiment, each of the supporting arms 1 is connected to three neighboring supporting arms, each connection by a string of dental floss 6. Each string of dental floss is connected to a floss fastening portion 7 at the second end of a supporting arm. The fastening portion 7 is preferably arranged between the rounded surface 5 and the connecting section 4. As can be seen, the multiple strings of dental floss are arranged to constitute the edges of a polyhedron, or more specific in this case, a tetrahedron.

In use, a person may put the present dental floss holder into the mouth and the shape/form of the holder makes it easy to guide the dental floss between the teeth by a combination of chewing on the holder and moving it around by using the tongue. The size of the dental floss holder is such that it can be put into the mouth and used in a comfortable manner. Further embodiments of the invention are shown in Figs. 2-4. The main difference between the embodiments is the number of supporting arms and consequently the number of strings of dental floss and thus the geometric shape of the holder. A dental floss holder comprising eight floss supporting arms 1 is shown in fig. 2. The multiple strings of dental floss are arranged to constitute the edges of a cube. In this specific embodiment, two strings of dental floss 6' , 6" are aligned and arranged on opposite sides of the connecting section 4.

A dental floss holder comprising twelve floss supporting arms 1 is shown in fig. 3 (the side view hides the four supporting arms which are mirror images of the four supporting arms extending towards the viewer). The multiple strings of dental floss are then arranged to constitute the edges of a polyhedron having 16 faces.

A dental floss holder comprising six floss supporting arms 1 is shown in fig. 4. The multiple strings of dental floss are arranged to constitute the edges of an

octahedron.

A dental floss holder comprising twelve floss supporting arms 1 is shown in fig. 5. A strengthening section 8 is shown arranged between two of the neighboring supporting arms. Such strengthening sections may be arranged between any number of supporting arms provided they do not interfere with the insertion of the strings of dental floss between adjacent teeth.

Various alternatives regarding the shape or form of the floss supporting arms are shown in Figs. 6a-f. The shape/form of the supporting arms may be varied in a multitude of ways, but they should be substantially longitudinal and comprise a fastening portion 7 to which a string of dental floss may be fastened. In the alternatives of Figs. 6a and 6d, the fastening portion 7 is shown as a slight narrowing of the supporting arm close to the rounded surface 5, while in Figs. 6b and 6c, the fastening portion 7 is shown as holes. In Figs. 6e and 6f, the fastening portion 7 is shown as slots. The illustrated fastening portions 7 are especially useful in embodiments where the strings of dental floss may be replaced. In embodiments where the strings of dental floss are permanent (e.g. for single use) they may be attached to the fastening portion 7 by molding, melting, embedding or gluing. When the latter methods for attaching are used the fastening portion is not restricted to any shape or form, and may only denote a position on the supporting arm, at which position a string of dental floss is, or may be, attached.

An alternative feature of a dental floss holder according to the invention is shown in fig. 7. In this case, a compressible material 9 is placed in the space between the strings of dental floss 6, the floss supporting arms and the connecting section, such that the compressible material 9 will help to push the strings of dental floss back out once inserted between adjacent teeth. The dental floss holder according to the invention, excluding the strings of dental floss per se, may be manufactured in any suitable material such as metals and synthetic polymers having the required mechanical properties with regards to strength and flexibility/rigidity. A requirement of such materials is their suitability for oral use by humans. In view of the present disclosure, and known examples of materials used in prior art dental floss holders, the skilled person would easily find a number of materials fulfilling the required properties.

Preferably, the dental floss holder is manufactured in one piece by molding. In such manufacture, the attachment of the strings of dental floss may advantageously be performed during the molding process, or in a subsequent manufacturing step wherein the strings of dental floss are fastened by melting or gluing.