The invention relates to a toothbrush having a handle and a head part, on which bristle filaments and at least one flexible cleaning element are arranged. According to the invention, the at least one flexible cleaning element is arranged on a carrier element which consists of a hard material and is connected to the head part. The invention also relates to a process for producing such a toothbrush.
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0. 67. A process for producing a toothbrush with a handle, a head part and a flexible structure made from a soft material, comprising:
providing a carrier element with at least one cleaning element and having a front side and a rear side and made from a harder material than that of the flexible structure;
connecting the carrier element to the head part in a non-releasable manner such that the rear side of the carrier element faces a front side of the head part; and
injecting the soft material to an injection point on a rear side of the head part to provide the flexible structure on the head part.
0. 50. A toothbrush, comprising;
a handle;
a head part;
a flexible structure made from a soft material;
a plate-like carrier element having a front side, a rear side and bristle receiving cutouts;
the carrier element being of a harder material than that of the flexible structure and connected to the head part such that the rear side of the carrier element faces a front side of the head part; and
bristle filaments guided through the bristle receiving cutouts, rear ends of the bristle filaments being melted, welded or adhesively bonded on the rear side of the carrier element;
wherein the flexible structure is provided on the head part and a corresponding injection point of the flexible structure is located on a rear side of the head part.
0. 66. A process for producing a toothbrush with a handle, a head part and a flexible structure made from a soft material, comprising:
providing a plate-like carrier element having a front side and a rear side and made from a harder material than that of the flexible structure;
providing a plurality of bristle filaments and guiding them through bristle receiving cutouts in the carrier element;
fastening rear ends of the bristles filaments on the rear side of the carrier element by melting, welding or adhesive bonding;
connecting the carrier element to the head part in a non-releasable manner such that the rear side of the carrier element faces a front side of the head part; and
injecting the soft material to an injection point on a rear side of the head part to provide the flexible structure on the head part.
0. 1. A toothbrush head, comprising:
a bristle-carrying head part;
bristle filaments and a cutout provided through the head part, the cutout including a bottom opening that is of a larger cross-section than an intermediate section of the cutout; and
a flexible, non-bristle cleaning element arranged on a carrier element, the cleaning element being made of a first material and the carrier element being made of a second, harder material, the carrier element including a base and a resiliently configured extension, the base having a cross-section larger than the intermediate section of the cutout, and the extension having an intermediate portion and a bottom with a cross-section that is larger than the intermediate portion of the extension and the intermediate section of the cutout, the bottom of the extension being resiliently inserted through the intermediate section of the cutout and into the bottom opening to prevent ready release of the carrier element from the head part by a snap-fit connection.
0. 2. The toothbrush head according to
0. 3. The toothbrush head according to
0. 4. The toothbrush head according to
0. 5. The toothbrush head according to
0. 6. The toothbrush head according to
0. 7. The toothbrush head according to
0. 8. The toothbrush head according to
0. 9. The toothbrush head according to
0. 10. The toothbrush head according to
0. 11. The toothbrush head according to
0. 12. The toothbrush head according to
0. 13. The toothbrush head according to
0. 14. The toothbrush head according to
0. 15. The toothbrush head according to
0. 16. The toothbrush head according to
0. 17. The toothbrush head according to
0. 18. A toothbrush head, comprising:
a bristle-carrying head part;
bristle filaments and a cutout provided on the head part;
a flexible, non-bristle cleaning element arranged on a carrier element, the carrier element being of a harder material than that of the flexible cleaning element, the carrier element including an extension that extends into the cutout and is connected to the head part by a not readily releasable snap-fit connection of the carrier element within the cutout; and
play between the carrier element and the head part at the cutout allows pivoting movement of the carrier element about an axis.
0. 19. The toothbrush head according to
0. 20. The toothbrush head according to
0. 21. The toothbrush head according to
0. 22. The toothbrush head according to
0. 23. The toothbrush head according to
0. 24. The toothbrush head according to
0. 25. The toothbrush head according to
0. 26. The toothbrush head according to
0. 27. The toothbrush head according to
0. 28. The toothbrush head according to
0. 29. The toothbrush head according to
0. 30. The toothbrush head according to
0. 31. The toothbrush head according to
0. 32. The toothbrush head according to
0. 33. The toothbrush head according to
0. 34. A process for producing a toothbrush head comprising:
providing a head part with a cutout and with bristle filaments, the cutout having a bottom end opening that is of a larger cross-section than an intermediate section of the cutout;
providing a flexible, non-bristle cleaning element coupled to a carrier element, the cleaning element being made of first material and the carrier being made of a second, harder material;
providing the carrier element with a base having a cross-section larger than the intermediate section of the cutout and an extension having an intermediate portion and a resiliently configured bottom with a cross-section that is larger than the intermediate section of the extension and the intermediate section of the cutout;
inserting the bottom of the extension through the intermediate section of the cutout and into the bottom end opening; and
connecting the carrier element to the cutout of the head part in a not-readily releasable snap-fit connection.
0. 35. The process as claimed in
0. 36. The process as claimed in
0. 37. The process as claimed in
0. 38. The process as claimed in
0. 39. The process as claimed in
providing the toothbrush head part with a handle.
0. 40. The process according to
0. 41. A process for producing a toothbrush head of a toothbrush comprising:
providing a head part with a cutout and bristle filaments;
providing a non-bristle cleaning element of a first material coupled to a carrier element of a second, harder material, the carrier element being formed with an extension;
inserting the extension into the cutout;
connecting the carrier element to the cutout of the head part by a not readily releasable snap-fit connection of the carrier element within the cutout; and
providing play between the carrier element and the head part at the cutout that allows pivoting movement of the carrier element about axis.
0. 42. The process as claimed in
0. 43. The process as claimed in
0. 44. The process as claimed in
0. 45. The process as claimed in
0. 46. The process as claimed in
0. 47. The process as claimed in
0. 48. The process according to
providing the toothbrush head part with a handle.
0. 49. The process according to
0. 51. The toothbrush as claimed in claim 50, wherein a contact surface defining a welding surface between the carrier element and the head part is kept free from the soft material of the flexible structure.
0. 52. The toothbrush as claimed in claim 51, wherein at least one flexible region interrupts the welding surface, with the result that non-welded locations are present.
0. 53. The toothbrush as claimed in claim 52, wherein the head part comprises at least one lateral opening having a shape adapted to the at least one flexible region arranged laterally on the carrier element.
0. 54. The toothbrush as claimed in claim 50, wherein at least one further flexible structure is attached to the plate-like carrier element.
0. 55. The toothbrush as claimed in claim 54, wherein bristle receiving cutouts are provided in the further flexible structure.
0. 56. The toothbrush as claimed in claim 50, wherein a play between the carrier element and the head part allows movement of the carrier element during use of the toothbrush.
0. 57. The toothbrush as claimed in claim 50, wherein a non-releasable connection is provided between the carrier element and the head part.
0. 58. The toothbrush as claimed in claim 57, wherein the non-releasable connection is achieved by clamping, snap-fitting, riveting, adhesive bonding, welding, ultrasonic welding or the supply of heat.
0. 59. The toothbrush as claimed in claim 50, wherein the carrier element consists of the same material as the head part.
0. 60. The toothbrush as claimed in claim 50, wherein the material of the carrier element is polypropylene, styrene-acrylonitrile, acrylonitrile-butadienestyrene, polyurethane or polyester.
0. 61. The toothbrush as claimed in claim 50, wherein an injection point of a flexible material is located on the carrier element within a region defined by a connecting border between the carrier element and the head part.
0. 62. The toothbrush as claimed in claim 61, wherein contacting locations between the head part and the carrier element are covered with the flexible material.
0. 63. The toothbrush as claimed in claim 61, wherein the flexible material includes natural or synthetic rubber.
0. 64. The toothbrush as claimed in claim 61, wherein the flexible material includes a thermoplastic elastomer.
0. 65. The toothbrush as claimed in claim 61, wherein the flexible material has a Shore A hardness of less than 90.
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22 22′ made of flexible material covers the underside of the head and handle parts 1, 2.
The carrier element 5 provided with conventional bristles 3 and the flexible structure 6, 6′, 6″ is inserted into a cutout 13 in the brush head 1. The brush head 1 is illustrated in various views without the carrier element 5 in
The carrier element 5 is connected to the brush head 1 by means of ultrasonic welding. The welding surface 26 is indicated by dashed lines. In order to realize the welding, the carrier element has, on its bottom border, a welding border 26′ which, during assembly, rests on the base of the cutout 13, the contact surface defining the welding surface 26. The welding border 26′ melts under the influence of ultrasound, with the result that the two parts 5 and 1 are connected to one another.
Since elastomeric material can only be welded ultrasonically to a limited extent, the welding surface 26, as far as possible, is kept free of this material, for example as in the case of the toothbrush from
In the example from
The non-welded locations 27 are sealed by the flexible regions 6″ here in the manner of a sealing lip, with the result that only a very small amount of water, if any at all, can penetrate into the cavity 28. For a good sealing function, material with a Shore A hardness of 50 or less is preferably selected. Non-welded locations between the head part and carrier element may also be used specifically, in order to achieve a certain level of flexibility between the two hard components.
As can be gathered from
The method of welding and sealing the components which has been described above with reference to
Fischer, Franz, Strahler, Reto
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