Toothbrush attachment and method for the production thereof

The toothbrush attachment according to the preceding claim, wherein the two body parts (7, 9) are formed by a brush tube (7) and a profile ring (9) fastened thereto.

The toothbrush attachment according to one of the preceding claims, wherein the at least one weld seam (13, 14) is formed as a hidden blind seam that is situated between the body parts (7, 9) and is covered by the two body parts (7, 9) at least on all sides that are visible and/or accessible from the outside, preferably being covered on all sides.

The toothbrush attachment according to one of the preceding claims, wherein the intermediate space is formed with a circular shape and is provided between the two body parts (7, 9) that plug in to one another, and wherein the at least one weld seam (13, 14) has a closed circular configuration.

The toothbrush attachment according to one of the preceding claims, wherein the at least one weld seam (13, 14) connects an inner jacket surface (19) of the one body part (7) to an outer jacket surface (16) of the other body part (9).

The toothbrush attachment according to one of the preceding claims, wherein the electronic module (10) is contained in a circular intermediate space (18) between the body parts (7, 9) that plug into one another, wherein the said intermediate space is sealed by two weld seams that run in circular fashion and that are situated axially apart from one another.

The toothbrush attachment according to one of the preceding claims, wherein an external body part (7) is formed so as to be a poor absorber of laser light, preferably transparent to laser light, at least in the area of the at least one weld seam.

The toothbrush attachment according to one of the preceding claims, wherein an internal body part (9) is formed so as to be absorbent to laser light at least in the area of the at least one weld seam (13, 14), and/or has a coating that is absorbent to laser light.

The toothbrush attachment according to one of the preceding claims, wherein the at least one weld seam (13, 14) is formed as a frictional weld seam.

The toothbrush attachment according to one of the preceding claims, wherein the intermediate space in which the electronic module (10) is contained is sealed by the at least one weld seam (13, 14) so as to be impervious to moisture and/or gas.

The toothbrush attachment according to one of the preceding claims, wherein the at least one weld seam (13, 14) extends directly past the electronic module (10) and/or in direct proximity to the electronic module (10).

The toothbrush attachment according to one of the preceding claims, wherein the two body parts (7, 9) are connected to one another by a positive connection, preferably a snap-on connection (15).

A toothbrush having a toothbrush attachment according to one of the preceding claims.

The method according to the preceding claim, wherein the two body parts (7, 9) are welded to one another by laser welding.

The method according to the preceding claim, wherein an internally hidden weld seam (13, 14) is produced by laser beam welding.

The method according to the preceding claim, wherein a plurality of weld seams (13, 14) are produced simultaneously by friction welding.