Toothbrush and process for producing such a toothbrush

• US 7,174,596 B2
• Filed: 12/20/2002
• Issued: 02/13/2007
• Est. Priority Date: 12/28/2001
• Status: Expired

• Current Assignee: Trisa Holding AG
• Original Assignee: Trisa Holding AG
• Inventors: Fischer, Franz, Strahler, Reto
• Primary Examiner(s): CHIN, RANDALL E
• Application Number:
  US10/362,590
• Publication Number:
  US 20030159224A1
• Time in Patent Office: 1,516 Days
• Field of Search: 151/10, 151/671, 152/01, D41/04, 300/21
• US Class Current: 15/110
• CPC Class Codes: A46B 15/00 Other brushes; Brushes with additional arrangements
• CPC Class Codes: A46B 15/0002 Arrangements for enhancing monitoring or controlling the brushing process
• CPC Class Codes: A46B 15/0032 with protrusion for polishing teeth
• CPC Class Codes: A46B 2200/1026 Gum massaging brush, i.e. specifically designed for massaging the gums
• CPC Class Codes: A46B 2200/1066 Toothbrush for cleaning the teeth or dentures A61C17/16 takes precedence; bristles arrangements for toothbrushes A46B9/04
• CPC Class Codes: A46B 3/06 by welding together bristles made of metal wires or plastic materials
• CPC Class Codes: A46B 7/04 interchangeably removable bristle carriers
• CPC Class Codes: A46B 7/10 as a rotating cylinder
• CPC Class Codes: A46B 9/04 Arranged like in or for toothbrushes
• CPC Class Codes: A46B 9/06 Arrangement of mixed bristles or tufts of bristles, e.g. wire, fibre, rubber
• CPC Class Codes: A46D 1/00 Bristles; Selection of materials for bristles making artificial bristles D01D, D01F
• CPC Class Codes: A46D 1/0207 Bristles characterised by the choice of material, e.g. metal
• CPC Class Codes: A46D 1/0238 Bristles with non-round cross-section
• CPC Class Codes: A46D 3/005 by moulding or casting a body around bristles or tufts of bristles
• CPC Class Codes: A61C 17/3436 Rotation around the axis perpendicular to the plane defined by the bristle holder
• CPC Class Codes: A61C 17/349 with multiple brush bodies
• CPC Class Codes: B29L 2031/425 Toothbrush
• CPC Class Codes: H04L 45/00 Routing or path finding of packets in data switching networks routing or path finding in wireless networks H04W40/00
• CPC Class Codes: H04L 45/22 Alternate routing
• CPC Class Codes: H04L 45/28 using route fault recovery
• CPC Class Codes: H04L 45/586 : of virtual routers
• CPC Class Codes: H04L 63/0209 : Architectural arrangements, e.g. perimeter networks or demilitarized zones

Abstract

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.

Claims

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.

2. The toothbrush head according to claim 1, wherein the connection is sufficient to prevent detaching of the carrier element from the head part during use of the toothbrush.

3. The toothbrush head according to claim 1, wherein the connection is non-releasable.

4. The toothbrush head according to claim 1, wherein play between the carrier element and the head part at the cutout allows movement of the carrier element and the flexible cleaning element during use of the toothbrush.

5. The toothbrush head according to claim 1, wherein the flexible cleaning element is arranged to massage gums of the user.

6. The toothbrush head according to claim 1, wherein the flexible cleaning element is made from a thermoplastic elastomer.

7. The toothbrush head according to claim 1, wherein the flexible cleaning element includes rubber.

8. The toothbrush head according to claim 1, wherein the flexible cleaning element has a Shore A hardness of less than 90.

9. The toothbrush head according to claim 1, wherein the material of the carrier element is a polypropylene, styrene-acrylonitrile, acrylonitrile-butadiene-styrene, polyurethane or polyester.

10. The toothbrush head according to claim 1, wherein the flexible cleaning element and the carrier element are produced by two-component or multi-component injection molding and mated with a non-releasable connection.

11. The toothbrush head according to claim 1, wherein the flexible cleaning element is inclined out of the vertical to come into contact with at least one of the bristle filaments.

12. The toothbrush head according to claim 1, wherein the flexible cleaning element crosses over at least one of the bristle filaments.

13. The toothbrush head according to claim 1, wherein the flexible cleaning element has a rod-like shape.

14. The toothbrush head according to claim 1, wherein the carrier element is harder than the flexible cleaning element.

15. The toothbrush head according to claim 1, wherein the cutout extends entirely through the head part.

16. The toothbrush head according to claim 1, wherein the head part includes a plurality of cutouts and a plurality of flexible cleaning elements and carrier elements.

17. The toothbrush head according to claim 1, further comprising a handle connected to the head part.

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.

19. The toothbrush head according to claim 18, wherein the axis is substantially perpendicular to the longitudinal axis of the head part.

20. The toothbrush head according to claim 18, wherein the connection is sufficient to prevent detaching of the carrier element from the head part during use of the toothbrush.

21. The toothbrush head according to claim 18, wherein the flexible cleaning element is made from a thermoplastic elastomer.

22. The toothbrush head according to claim 18, wherein the flexible cleaning element includes rubber.

23. The toothbrush head according to claim 18, wherein the flexible cleaning element has a Shore A hardness of less than 90.

24. The toothbrush head according to claim 18, wherein the harder material of the carrier element is a polypropylene, styrene-acrylonitrile, acrylonitrile-butadiene-styrene, polyurethane or polyester.

25. The toothbrush head according to claim 18, wherein the flexible cleaning element is inclined out of the vertical to come into contact with at least one of the bristle filaments.

26. The toothbrush head according to claim 18, wherein the flexible cleaning element has a rod-like shape.

27. The toothbrush head according to claim 18,wherein the cutout is provided through the head part and includes an end opening that is of a larger cross-section than an intermediate section of the cutout.

28. The toothbrush head according to claim 18, further comprising a handle connected to the head part.

29. The toothbrush head according to claim 18, wherein the head is also formed from a material that is harder than the flexible, non-bristle containing cleaning element so that a hard material to hard material snap-fit connection is formed.

30. The toothbrush head according to claim 18, wherein the carrier extension is a snap-fitting element, and the snap-fitting element and the carrier form a single-piece body of the harder material.

31. The toothbrush head according to claim 18, wherein the not-readily releaseable snap-fit connection is formed by one of the extension and the head part resiliently deforming.

32. The toothbrush head according to claim 18, wherein the cleaning element is non-releasably attached to the carrier element through two component or multi-component injection molding.

33. The toothbrush head according to claim 18, wherein the head involves a plurality of cutouts and a plurality of snap-fit carrier elements.

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.

35. The process as claimed in claim 34, wherein the connecting occurs after the toothbrush head is provided with the bristle filaments.

36. The process as claimed in claim 34, wherein the bristle filaments provided on the head part are processed prior to connecting the carrier element to the cutout of the head part.

37. The process as claimed in claim 34, wherein the processing includes at least one of rounding, cutting and machining processing operations.

38. The process as claimed in claim 34, wherein the flexible cleaning element and the carrier element are produced by two-component or multi-component injection molding.

39. The process as claimed in claim 34, further comprising:

providing the toothbrush head part with a handle.

40. The process according to claim 34, further comprising inserting the carrier element into the cutout from a bristle bearing front face of the head part.

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.

42. The process as claimed in claim 41, wherein the connecting occurs after the toothbrush head is provided with the bristle filaments.

43. The process as claimed in claim 42, wherein the bristle filaments provided on the head part are processed prior to connecting the carrier element to the head part.

44. The process as claimed in claim 43, wherein the processing includes at least one of rounding, cutting and machining processing operations.

45. The process as claimed in claim 41, wherein the flexible cleaning element and the carrier element are produced by a two-component or multi-component injection molding.

46. The process as claimed in claim 45, wherein the flexible cleaning element is produced from a thermoplastic elastomer or rubber and the carrier element is produced from a polypropylene, styrene-acrylonitrile, acrylonitrile-butadiene-styrene, polyurethane or polyester.

47. The process as claimed in claim 45, wherein the material of the flexible, non-bristle containing cleaning element and the harder material of the carrier are chosen to be compatible with each other to produce a non-releasable connection in the two component or multi-component injection molding process.

48. The process according to claim 41, further comprising:

providing the toothbrush head part with a handle.

49. The process according to claim 41, further comprising inserting the carrier element into the cutout from a bristle bearing front face of the head part.