Manual toothbrush with flat head

Abstract

The application relates to a manual toothbrush having an elongate handle portion and a brush head. The brush head is provided with a bristle group with a plurality of bristle filaments. The handle portion and the brush head are connected to each other via the neck section. The brush head has a thickness in the direction of extension of the bristle filaments, which thickness decreases in the longitudinal direction of the brush head from a first transition region between the neck section and the brush head to the free end of the brush head, such that the thickness at the free end of the brush head is less than 80% of the thickness at the first transition region.

Description

Technical Field

[0001] This invention relates to a manual toothbrush having a handle, a brush head, and a neck section connecting the handle and the brush head. The thickness of the brush head decreases from a first transition region located between the neck section and the brush head towards the free end of the brush head. Background Technology

[0002] Manual toothbrushes are generally more comfortable to use if they are as small as possible, especially if the brush head is designed to be as thin as possible. Thinner brush heads generally feel better in the mouth of the user than thicker brush heads.

[0003] Such toothbrushes are known, for example, from DE 10 2022 112 600 A1 (Zahoransky AG).

[0004] In addition, toothbrushes should have good elasticity to prevent excessive force on the gums, thus minimizing damage or irritation. Summary of the Invention

[0005] The objective of this invention is to create a toothbrush belonging to the technical field mentioned at the beginning, which enables comfortable brushing and reduces irritation to the gums.

[0006] The solution to this problem is defined by the features of claim 1. According to the invention, a manual toothbrush includes an elongated handle portion and a brush head having a bristle assembly with a plurality of bristles. The handle portion and the brush head are connected to each other via a neck section. The brush head has a thickness in the direction of bristle extension, the thickness decreasing in the longitudinal direction of the brush head from a first transition region between the neck section and the brush head to the free end of the brush head, such that the thickness at the free end of the brush head is less than 80% of the thickness at the first transition region.

[0007] Because of its gradually decreasing thickness, the brush head feels significantly more comfortable in the mouth than a brush head with a constant thickness along its entire length. Furthermore, the gradually decreasing thickness provides the brush head with elasticity, reliably preventing excessive force against the gums. Finally, the reduced thickness also gives the brush head a very refined and elegant appearance.

[0008] The manual toothbrush has a second transition area located between the handle and the neck section, including a first transition area between the brush head and the neck section.

[0009] The elongated handle portion is preferably a straight element with a circular, elliptical, or polygonal, especially quadrilateral or octagonal, cross-section. The length of the handle portion is preferably 8 cm to 12 cm, especially 9 cm to 11 cm. The handle portion can be made of a solid material, or preferably constructed as a hollow body, wherein, in the case of a hollow body, the opening at the free end of the handle portion, i.e., the end not connected to the neck section, is closed by means of a sealing component, particularly in a waterproof manner. Designing it as a hollow body saves material in manufacturing and reduces the weight of the manual toothbrush.

[0010] The handle portion preferably has a width of 1 cm to 1.5 cm, that is, an extension perpendicular to the direction of bristle extension. The thickness of the handle portion, that is, its extension in the direction of bristle extension, is preferably also between 1 cm and 1.5 cm. The width and thickness of the handle portion can be the same, but preferably they are different. Preferably, the ratio of the width to the thickness of the handle portion is 1:0.9 to 1:0.7.

[0011] The thickness and / or width of the handle portion preferably decreases from the free end of the handle portion towards the second transition region. That is, the handle portion has a smaller thickness and / or a smaller width at the second transition region than at the free end. Preferably, the thickness and / or width of the handle portion at the second transition region is 60% to 80%, particularly 65% ​​to 75%, of the thickness and / or width of the handle portion at its free end. The reduction in the thickness and / or width of the handle portion preferably occurs continuously from the free end towards the second transition region.

[0012] The neck section is preferably made of a solid material. At the second transition region, the neck section preferably has the same cross-section and dimensions as the handle portion. This allows for a seamless transition from the handle portion to the neck section. From the second transition region to the first transition region, the cross-section and dimensions of the neck section can vary, and preferably vary continuously. Preferably, the neck section has smaller dimensions at the first transition region than at the second transition region. That is, the thickness and / or width of the neck section at the first transition region is preferably smaller than the thickness and / or width of the neck section at the second transition region.

[0013] The brush head has bristle tufts made of multiple bristle filaments in a known manner. The bristle filaments protrude from the brush head on a first side and are all erect, substantially parallel to each other. The bristle filaments are preferably made of a polymer material and are preferably divided into multiple bundles. The bundles preferably have a substantially cylindrical or slightly conical shape. The bundles on the first side of the brush head preferably all have substantially the same circular base surface. The bundles are preferably arranged in a geometric pattern on the first side of the brush head, particularly in multiple rows arranged side-by-side. In the longitudinal direction of a manual toothbrush, the bundles in adjacent rows can be arranged on the first side of the brush head, each offset from the others by half a bundle diameter.

[0014] The bristles are preferably fixed to the first surface of the brush head by means of material matching, especially by welding or fusing the bristles to the first surface of the brush head.

[0015] The thickness and width of the brush head and neck section in the first transition area are preferably the same. Thus, the manual toothbrush has a smooth transition between the neck area and the brush head.

[0016] The brush head preferably has an elliptical or polygonal shape. However, the brush head is preferably in the form of a stadium. That is, the brush head widens from a first transition region toward the free end of the brush head, then has a constant width over a defined length, and has a rounded edge at the free end.

[0017] The width of the brush head is preferably greater than the width at the first transition region at least in the middle between its free end (i.e., the end not adjacent to the neck section) and the first transition region, and preferably also greater than the width of the handle portion at the second transition region. Preferably, the width of the brush head in the middle is 0.8 cm to 1.5 cm, especially 1 cm to 1.2 cm.

[0018] The brush head has a smaller thickness at its free end than in the first transition region, wherein the thickness of the brush head at the free end is less than 80% of the thickness in the first transition region. However, the thickness of the brush head at its free end is preferably at least 40% of the thickness of the brush head in the first transition region, more preferably at least 50%.

[0019] The handle, neck section, and brush head are securely connected to each other. Preferably, the handle, neck section, and brush head are constructed as a single piece, meaning that each of these elements represents a defined area of ​​a continuous component.

[0020] Preferably, the thickness of the brush head decreases continuously from the first transition region towards the free end. That is, the thickness of the brush head decreases uniformly and without abrupt changes from the first transition region towards the free end. Here, the second side of the brush head, opposite the first side with the bristle assembly, can be designed to be straight and at an angle relative to the first side. However, the second side of the brush head preferably has a curved portion with a constant radius. This curved portion convexes relative to the first side.

[0021] Preferably, the neck section has a thickness in the direction of bristle extension, the thickness decreasing from the second transition region between the handle and the neck section to the first transition region, wherein the thickness of the neck section in the first transition region is between 20% and 40% of the thickness in the second transition region.

[0022] By reducing the thickness of the neck section, the neck section acquires excellent elastic properties. These elastic properties, combined with the elastic properties of the brush head, result in an additional reduction in the force applied to the gums. In other words, the combination of the reduced thickness of the brush head and the neck section creates a synergistic effect that enables brushing in a much more gum-friendly manner compared to manual toothbrushes known in the prior art.

[0023] The thickness of the neck segment preferably decreases continuously from the second transition region to the first transition region. That is, the thickness of the neck segment decreases uniformly and without abrupt changes from the second transition region to the first transition region. This results in the elastic effect of the neck segment increasing as the distance towards the first transition region and the second transition region increases.

[0024] Preferably, the neck section has a curved portion pointing in the direction of the bristles. That is, the neck section has a curved portion that corresponds to the curvature of the teeth in the mouth when using a manual toothbrush. This allows for more comfortable brushing for the user because the skin of the cheek does not need to be stretched too much in order to reach the last molars or wisdom teeth with the brush head. In addition, the curved portion, together with the reduced thickness of the neck section, has a synergistic effect on the elasticity of the manual toothbrush.

[0025] Preferably, the outer radius of the curved portion is between 10 cm and 18 cm, particularly between 12 cm and 16 cm. Here, the outer radius of the curved portion is located on the side of the neck section away from the direction of the bristles, that is, on the side of the neck section adjacent to the second side of the brush head.

[0026] Preferably, the curved portion of the outer radius is tangent to the adjacent side of the handle portion, that is, the transition between this side of the handle portion and the curved portion is without bending.

[0027] Preferably, the curved portion has an inner radius smaller than the outer radius. Here, the inner radius is located on the side of the neck section that points in the direction of the bristles, i.e., the side of the neck section adjacent to the first side of the brush head. Preferably, the curved portion with the inner radius is not tangent to the adjacent surface of the handle. That is, the curved surface of the neck section with the inner radius is at an angle to the adjacent surface of the handle. This angle is preferably 1° to 3°. Correspondingly, the manual toothbrush has a bend in the second transition region between the curved surface of the neck section with the inner radius and the surface of the handle adjacent to that surface. By using different radii and angles, the thickness of the neck section can be easily reduced.

[0028] Preferably, the width of the neck segment decreases from the second transition region to the first transition region, wherein the width of the neck segment in the first transition region is between 30% and 75% of the width in the second transition region, and more preferably between 40% and 60%.

[0029] The width of the neck section is the transverse extension of the neck section in the direction of the bristle extension.

[0030] By reducing the width, the neck segment can be designed to appear more refined. Furthermore, reducing the width of the neck segment also improves its elasticity, as the cross-section of the neck segment is consequently reduced.

[0031] Preferably, the thickness of the brush head at its free end is 1 mm to 4 mm, particularly 1.5 mm to 2.5 mm. This thickness at the free end of the brush head gives it a visually appealing and refined shape, while still maintaining sufficient material strength to prevent breakage during normal use.

[0032] The thickness of the brush head at the first transition region is preferably 2 mm to 6 mm, particularly 2.3 mm to 3 mm. By selecting the thickness at the first transition region in conjunction with the thickness mentioned above at the free end of the brush head, the brush head exhibits optimal elastic properties.

[0033] Preferably, the neck segment has a thickness of 6 mm to 12 mm, particularly 7.5 mm to 9.5 mm, at the second transition region.

[0034] Preferably, the brush head has a recess in which a carrier plate with multiple holes is fixed.

[0035] The bristles are preferably fixed in holes in the carrier plate, and the carrier plate is then arranged in and fixed therein in the recess. Preferably, the brush head has a surrounding boundary that surrounds the recess, so that the carrier plate is mechanically fixed laterally by the boundary. Thus, the carrier plate can absorb larger horizontal forces in the plane of the first side of the brush head, thereby reliably preventing accidental loosening of the carrier plate under high horizontal forces, especially those generated when the brush head makes circular movements on the tooth surface.

[0036] The support plate is preferably fixed in the recess by form fit and / or force fit. Form fit fixing can be achieved, for example, by means of a locking element of the support plate that engages with a corresponding notch in the boundary region of the recess. Force fit connection can be achieved, for example, by welding or bonding the support plate in the recess.

[0037] The bristles are preferably divided into multiple bundles, each bundle being inserted into a hole in a carrier plate and connected to the carrier plate, particularly in a material-fitting manner.

[0038] The joining of materials can be achieved by welding the bristles to the carrier plate. However, preferably, the bristles are fused to the underside of the carrier plate at their ends in the inlet holes. Preferably, the bristles are also fused to the brush head. Thus, the carrier plate can be fixed to the brush head via the fused ends of the bristles. In this embodiment, the fused ends of the bristles are therefore used both to fix the bristles to the carrier plate and the brush head, and also to fix the carrier plate to the brush head. This simplifies the manufacture of manual toothbrushes, as fixing the bristles and carrier plate to the brush head can be done in a single step.

[0039] Preferably, the handle, neck section, and brush head are constructed as a single piece. This allows for the manufacture of a manual toothbrush with as few parts as possible, wherein the unit comprising the handle, neck section, and brush head can be manufactured particularly simply and efficiently using injection molding.

[0040] Preferably, the handle, neck section, and brush head are made of the same material as the bristles, and preferably the support plate is also made of the same material.

[0041] By designing all components from the same materials, the recycling of manual toothbrushes is significantly simplified, as individual components do not need to be pre-disassembled for return to the corresponding product cycle.

[0042] Preferably, the material is a biodegradable polymer material, especially polyamide.

[0043] Further advantageous embodiments and combinations of features of the invention will be obtained from the following detailed description and all the patent claims. Attached Figure Description

[0044] The accompanying drawings are used to illustrate the embodiments: Figure 1 A first embodiment of the manual toothbrush according to the present invention is shown in a side view; Figure 2 A top view shows the results according to Figure 1 A manual toothbrush as an implementation method; Figure 3 It shows according to Figure 1 and Figure 2 Isometric view of the first embodiment of the manual toothbrush 1; Figure 4 A second embodiment of the manual toothbrush according to the present invention is shown in a side view; Figure 5 A top view shows the results according to Figure 4 The second embodiment of the manual toothbrush; Figure 6 A perspective view shows a manual toothbrush according to a second embodiment; Figure 7A detailed diagram of a brush head according to a first or second embodiment of a manual toothbrush according to the present invention is shown; Figure 8 It shows crossing according to Figure 7 The longitudinal section of the brush head; Figure 9 A top view of one embodiment facing the support plate is shown.

[0045] In principle, identical parts are given the same reference numerals in the accompanying drawings. Detailed Implementation

[0046] Figure 1 A first embodiment of a manual toothbrush 1 according to the present invention is shown in a side view. The manual toothbrush 1 includes a handle portion 2, a brush head 3, and a neck section 6 extending between the handle portion 2 and the brush head 3. The handle portion 2, the neck section 6, and the brush head 3 are constructed as a single piece, thus representing a single component area. The handle portion 2 has a substantially octagonal cross-section and a bevel at its free end 10 (i.e., the end that does not transition into the neck section 6). In the illustrated embodiment, the handle portion 2 is constructed as a hollow body, wherein the free end 10 of the handle portion 2 is closed by means of a closing member 17 (see [link to documentation]). Figure 2 (Closed.) Multiple bundles of bristles are arranged on the first surface 18 of the brush head 3 (see...) Figure 7 and 8 The brush bristle assembly 4 is made of the same material as the handle portion 2, the neck section 6, and the brush head 3. The bristle filaments protrude from the first surface 18. Preferably, the bristle filaments are made of the same material as the handle portion 2, the neck section 6, and the brush head 3.

[0047] The neck segment 6 connects to the brush head 3 in the first transition region 7 and to the handle portion 2 in the second transition region 8. The thickness of the brush head 3 decreases from the first transition region 7 towards its free end 9. That is, the brush head 3 has a first thickness D1 in the first transition region 7, which is greater than the second thickness D2 at the free end 9. The thickness of the neck segment 6 also decreases from the second transition region 8 towards the first transition region 7. That is, the neck segment 6 has a third thickness D3 in the second transition region 7, which is greater than the first thickness D1 in the first transition region 7. It should be noted that in the first transition region 7, not only the brush head 3 but also the neck segment 6 has the same first thickness D1. Furthermore, the thickness of the handle portion 2 also decreases from its free end 10 towards the second transition region 8. That is, the handle portion 2 has a fourth thickness D4 at its free end 10, which is greater than the third thickness D3 in the second transition region 8. It should be noted that not only the neck segment 6 but also the handle portion has the same third thickness D3 in the second transition region. By reducing the thickness of the brush head 3 and the neck section 6, the manual toothbrush 1 possesses a soft characteristic. This soft characteristic reliably prevents excessive force from being applied to the gums during brushing.

[0048] In the illustrated embodiment, the first thickness D1 at the first transition region 7 is 2.5 mm, the second thickness D2 at the free end 9 of the brush head 3 is 1.5 mm, the third thickness D3 at the second transition region 8 is 8 mm, and the fourth thickness D4 at the free end 10 of the handle portion 2 is 11 mm.

[0049] The neck segment 6 further has a bend 14, meaning that the neck segment 6 bends between the second transition region 8 and the first transition region 7. Here, the bend points substantially in the direction of the bristles. That is, the bend is concave relative to the direction of extension of the bristles. The neck segment 6 has an outer radius R1 and an inner radius R2. The outer radius R1 defines the bend on the side of the neck segment 6 opposite to the bristle assembly 4, while the inner radius defines the bend on the side of the neck segment 6 facing the bristle assembly 4. In the second transition region 8, the outer radius R1 extends tangentially to the handle portion 2, meaning that the bend of the neck segment with outer radius R1 transitions seamlessly into the adjacent surface of the handle portion 2. The bend of the neck segment 6 with inner radius R2 has an angle α with the adjacent surface of the handle portion 2 in the second transition region 8. This angle is preferably 1° to 3°. The inner radius R2 is smaller than the outer radius R1. The ratio of the outer radius R1 to the inner radius R2 is chosen such that, with the combined angle α, a reduction in the thickness of the neck segment 6 is achieved within the desired range. In the illustrated embodiment, the outer radius R1 is 240 mm, the inner radius R2 is 80 mm, and the angle α is 1°.

[0050] With the implementation of the curved neck section 6, the elastic properties of the manual toothbrush 1 are improved, which in turn makes the brushing experience more comfortable because the inclination of the brush head 3 relative to the handle section 2 substantially corresponds to the curvature of the entire set of teeth. Therefore, compared to a manual toothbrush without curvature, the user's cheeks are stretched less or not at all during brushing.

[0051] Figure 2 A top view shows the results according to Figure 1 The manual toothbrush 1 of the first embodiment shown in the figure. As from Figure 2As can be seen from this, not only does the thickness of the handle portion 2 and the neck portion 6 decrease in the direction of the brush head 3, but their width, that is, their extension in the direction transverse to the extension direction of the bristles of the bristle assembly 4, also decreases. Therefore, the neck portion 6 has a first width B1 at the first transition region 7 that is smaller than the third width B3 at the second transition region 8. Similarly, the handle portion 2 in the second transition region 8 has a third width B3 that is smaller than the fourth width B4 at the free end 10 of the handle portion 2, and this third width corresponds to the third width B3 of the neck portion 6. The width of the handle portion 2 continuously decreases from the free end 10 to the second transition region 8. The width of the neck portion 6 also continuously decreases from the second transition region 8 to the first transition region.

[0052] In the illustrated embodiment, the first width B1 at the first transition region 7 is 6 mm, the third width B3 at the second transition region 8 is 11 mm, and the fourth width B4 at the free end 10 of the handle portion 2 is 14 mm.

[0053] Conversely, the brush head has a substantially dynamic shape in a plane perpendicular to the extension direction of the bristles of the bristle assembly 4. That is, the width of the brush head 3 increases from a first width B1 to a second width B2 from the first transition region 7, wherein the brush head 3 has a second width B2 substantially over its entire length. Only in the region of the free end 9 of the brush head 3 does the brush head have an edge curved with a constant radius. In the illustrated embodiment, the second width B2 of the brush head 3 is 12 mm.

[0054] Figure 3 It shows in Figure 1 and Figure 2 The figure shows an isometric view of a first embodiment of the manual toothbrush 1. The refined design of the brush head 3 and the curved shape of the neck section 6 are clearly visible in this figure.

[0055] Figure 4 A second embodiment of the manual toothbrush 1 according to the present invention is shown in a side view. (Compared to...) Figures 1 to 3 In contrast to the first embodiment, the neck segment 6 does not have an outer radius R1, but rather the face of the neck segment 6 opposite to the bristle assembly 4 has a bend 15. However, the face of the neck segment 6 in the direction of the bristle assembly 4 is designed to be bent with an inner radius R2, just like in the first embodiment.

[0056] Figure 5 It is shown in a top view as it is in Figure 4 The figure shows a manual toothbrush according to the second embodiment. It can also be clearly seen in the figure that the design of the second embodiment substantially corresponds to that according to... Figures 1 to 3 The first embodiment is particularly notable for the reduction in width of the handle portion 2 and the neck portion 6. Furthermore, it can be observed that the closure portion 17 is decorated.

[0057] Figure 6 A perspective view of the manual toothbrush according to the second embodiment is shown. It is clearly visible in the figure how the opening at the free end 10 of the hollow handle portion 2 is closed by means of the sealing member 17. This reliably prevents water from entering the interior of the handle portion 2, while retaining the advantage of the hollow design, namely, reduced weight.

[0058] Figure 7 A detailed view of a brush head 3 according to a first or second embodiment of a manual toothbrush 1 according to the present invention is shown. The brush head 3 has a recess 11 on a first surface 18. A support plate 12 is received in the recess 11, wherein the support plate 12 is securely connected to the brush head 3. The support plate 12 has a plurality of holes (see...). Figure 9 Bundles 16 of bristles are fixed in these holes. The bundles 16 of bristles together constitute the bristle assembly 4 of the manual toothbrush 1. The bundles 16 are arranged in multiple rows side by side, wherein adjacent bundles 16 are offset from each other by half a bundle width in the longitudinal direction of the brush head 3.

[0059] Figure 8 It shows crossing according to Figure 7 The longitudinal section of the brush head 3 is shown. The arrangement of the support plate 12 in the recess 11 of the brush head 3 and the arrangement of the bundled bristles 16 in the support plate 12 can be clearly identified. Preferably, the bundled bristles 16 are fused with the support plate 12, wherein the molten bristles also securely connect the support plate 12 to the brush head 3 in the recess 11.

[0060] Figure 9 A top view is shown of one embodiment of a carrier plate 12 that can be used in a manual toothbrush 1 according to the first or second embodiment. The carrier plate 12 is substantially flat and has a plurality of holes 13. The edges of the carrier plate 12 follow the roundness of the outermost holes 13, such that the outer contour of the carrier plate 12 is substantially wavy. Needless to say, the recess 11 of the brush head 3 is correspondingly shaped so that the carrier plate 12 can be received therein substantially without gaps.

Claims

1. A manual toothbrush having an elongated handle portion (2) and a brush head (3) having a bristle set (4) with a plurality of bristle filaments, wherein the handle portion (2) and the brush head (3) are connected to each other via a neck section (6), characterized in that The brush head (3) has a thickness in the direction of extension of the bristle filaments which decreases from a first transition area (7) between the neck section (6) and the brush head (3) to a free end (9) of the brush head (3) in the longitudinal direction of the brush head (3) such that the thickness (D2) at the free end (9) of the brush head (3) is less than 80% of the thickness (D1) at the first transition area (7).

2. The manual toothbrush according to claim 1, wherein The thickness of the brush head (3) continuously decreases from the first transition area (7) to the free end (9) of the brush head (3).

3. The manual toothbrush according to any one of claims 1 or 2, characterized in that The neck section (6) has a thickness in the direction of extension of the bristle filaments which decreases from a second transition area (8) between the handle section (2) and the neck section (6) to the first transition area (7), wherein the thickness (D1) of the neck section (6) in the first transition area (7) is between 20% and 40% of the thickness (D3) in the second transition area (8).

4. The manual toothbrush of claim 3, wherein The thickness of the neck section (6) continuously decreases from the second transition area (8) to the first transition area (7).

5. The manual toothbrush according to any one of claims 1 to 4, characterized in that The neck section (6) has a curvature (14) pointing in the direction of the bristle filaments.

6. The manual toothbrush of claim 5, wherein, The outer radius (R1) of the curvature (14) is between 10 cm and 18 cm, in particular between 12 cm and 16 cm.

7. The manual toothbrush according to any one of claims 1 to 6, characterized in that The width of the neck section (6) decreases from the second transition area (8) to the first transition area (7), wherein the width (B1) of the neck section (6) at the first transition area (7) is between 30% and 75%, preferably between 40% and 60%, of the width (B3) at the second transition area (8).

8. The manual toothbrush according to any one of claims 1 to 7, characterized in that The thickness (D2) of the brush head (3) at the free end (9) is 1 mm to 4 mm, in particular 1.5 mm to 2.5 mm.

9. The manual toothbrush according to any one of claims 1 to 8, characterized in that The thickness (D1) of the brush head (3) at the first transition area (7) is 2 mm to 6 mm, in particular 2.3 mm to 3 mm.

10. The manual toothbrush according to any one of claims 1 to 9, characterized in that The neck section (6) has a thickness (D3) of 6 mm to 12 mm, in particular 7.5 mm to 9.5 mm, at the second transition area (8).

11. The manual toothbrush according to any one of claims 1 to 10, characterized in that The brush head (3) has a recess (11) in which a carrier plate (12) with a plurality of holes (13) is fixed.

12. The manual toothbrush of claim 11, wherein, The bristle filaments are divided into a plurality of bundles (16), wherein each bundle (16) is inserted into a hole (13) of the carrier plate (12) and is connected to the carrier plate (12), in particular in a material-fit manner.

13. The manual toothbrush according to any one of claims 1 to 12, characterized in that The handle section (2), the neck section (6) and the brush head (3) are configured in one piece.

14. The manual toothbrush according to any one of claims 1 to 13, characterized in that The handle section (2), the neck section (6) and the brush head (3) are made of the same material as the bristle filaments, wherein preferably the carrier plate (12) is also made of the same material.

15. The manual toothbrush of claim 14, wherein, The material is a biodegradable polymer material, in particular a polyamide.

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