Dividable dental care product, head part and kit of parts

Abstract

A kit of parts, and a dividable dental care product comprising a base part having a handle portion and an interconnection portion comprising a protruding portion being provided with an external threading and with a shoulder extending radially outwardly from and circumferentially around the protruding portion and presenting an abutment surface, and a head part having a dental care utility portion and an interconnection portion comprising a tubular portion with an internal threading and with an end surface extending circumferentially around a mouth of the tubular portion, wherein the abutment surface of the base part is configured to abut the end surface of the head part when the base part and head part are interconnected to each other in order to form said dividable dental care product.

1 . A dividable dental care product, comprising:
 a base part having a handle portion and an interconnection portion, and   a head part having an interconnection portion and a dental care utility portion, wherein the base part and the head part are configured to be separably interconnected by their respective interconnection portion,   wherein the interconnection portion of the head part comprises a tubular portion with an internal threading formed on an inwardly facing envelope surface of the tubular portion,   wherein the interconnection portion of the base part comprises a protruding portion extending along a longitudinal direction along a central axis from the handle portion towards a free end of the protruding portion, the protruding portion being provided with an external threading formed in an outwardly facing envelope surface of the protruding portion,   wherein the protruding portion is configured to be received into the tubular portion by a threading motion about the central axis,   wherein the interconnection portion of the base part comprises a shoulder which extends radially outwardly from and circumferentially around the protruding portion and which presents an abutment surface configured to face the head part,   wherein the tubular portion is provided with an end surface extending circumferentially around a mouth of the tubular portion,   characterised in that wherein the abutment surface of the base part is configured to abut the end surface of the head part when the base part and head part are interconnected to each other in order to form said dividable dental care product, and   wherein the internal threading has a root thickness and a thread pitch as measured along long the central axis, wherein the thread pitch is at least two times the root thickness.   
     
     
         2 . The dividable dental care product of  claim 1 , wherein the abutment surface of the base part is configured to sealingly abut the end surface of the head part when the base part and head part are interconnected to each other in order to form said dividable dental care product. 
     
     
         3 . The dividable dental care product of  claim 1 , wherein the internal threading of the tubular portion and the external threading of the protruding portion have a trapezoid profile. 
     
     
         4 . The dividable dental care product of  claim 1 , wherein the inwardly facing envelope surface of the tubular portion is tapered such that an inner diameter of the inwardly facing envelope surface decreases with increased distance from the mouth of the tubular portion. 
     
     
         5 . The dividable dental care product of  claim 1 , wherein the inwardly facing envelope surface comprises a non-threaded portion extending from the mouth a distance along the central axis, wherein the distance is at least equal to one times a root thickness of the internal threading. 
     
     
         6 . The dividable dental care product of  claim 1 ,
 wherein the protruding portion comprises a non-threaded portion extending from the shoulder a distance along the central axis, wherein the distance is at least equal to one times a root width of the external threading.   
     
     
         7 . The dividable dental care product of  claim 1 , wherein the dividable dental care product is a toothbrush, wherein the dental care utility portion comprises a brush section comprising a brush head formed in the head part at an end portion of the head part opposing the tubular portion and a plurality of bristles attached to a transversely oriented surface of the brush head. 
     
     
         8 . The dividable dental care product of  claim 1 , wherein a distance along the central axis between a distal end of the brush head and the mouth of the tubular portion is at least 60 mm. 
     
     
         9 . The dividable dental care product of  claim 1 , wherein an outer circumferential envelope surface of the shoulder of the base part is flush with an outer envelope surface of the head part at the mouth of the tubular portion when the base part and head part are interconnected to each other in order to form said dividable dental care product. 
     
     
         10 . The dividable dental care product  claim 1 , wherein the base part is rotationally symmetrical about the central axis. 
     
     
         11 . The dividable dental care product of  claim 1 , wherein the base part and the head part are formed from different materials. 
     
     
         12 . The dividable dental care product of  claim 1 , wherein the head part is formed of a polymer-based material. 
     
     
         13 . The dividable dental care product of  claim 1 , wherein the base part is formed of a wood-based material. 
     
     
         14 . The dividable dental care product of  claim 1 , wherein the base part is formed of a polymer-based material. 
     
     
         15 . A head part configured to form part of a dividable dental care product, the head part having an interconnection portion and a dental care utility portion, wherein the head part is configured to be separably interconnected with its interconnection portion to an interconnection portion of a base part,
 wherein the interconnection portion of the head part comprises a tubular portion extending around a central axis and being provided with an internal threading formed on an inwardly facing envelope surface of the tubular portion,   wherein the tubular portion is provided with an end surface extending circumferentially around a mouth of the tubular portion,   wherein the end surface of the head part is configured to abut an abutment surface of the base part facing the end surface of the head part, when the base part and the head part are interconnected to each other in order to form said dividable dental care product, and   wherein the internal threading has a root thickness and a thread pitch as measured long along the central axis, wherein the thread pitch is at least two times the root thickness.   
     
     
         16 . A kit of parts comprising:
 a plurality of head parts each having an interconnection portion and a dental care utility portion, wherein each one of the head parts is configured to one at the time be separably interconnected with its interconnection portion to an interconnection portion of a base part,   wherein the interconnection portion of the head part comprises a tubular portion extending around a central axis and being provided with an internal threading formed on an inwardly facing envelope surface of the tubular portion,   wherein the tubular portion is configured to receive the interconnection portion of the base part by a threading motion about the central axis,   wherein the tubular portion is provided with an end surface extending circumferentially around a mouth of the tubular portion,   wherein when the base part and the head part are interconnected to each other in order to form said dividable dental care product, the end surface of the head part is configured to abut an abutment surface of the base part facing the end surface of the head part, and   wherein the internal threading has a root thickness and a thread pitch as measured long along the central axis, wherein the thread pitch is at least two times the root thickness.   
     
     
         17 . The kit of parts of  claim 16 , further comprising
 a base part having a handle portion and an interconnection portion,   wherein the interconnection portion of the base part comprises a protruding portion extending along a longitudinal direction along a central axis from the handle portion towards a free end of the protruding portion, the protruding portion being provided with an external threading formed on an outwardly facing envelope surface of the protruding portion,   wherein the protruding portion is configured to be received into the tubular portion by a threading motion about the central axis,   wherein the interconnection portion of the base part comprises a shoulder which extends circumferentially around the protruding portion and which presents said abutment surface configured to face the head part.   
     
     
         18 . The kit of parts of  claim 16 , comprising
 a first base part having a handle portion and an interconnection portion, and   a second base part having a handle portion and an interconnection portion,   wherein the first base part is formed of a wood-based material and the second base part is formed of polymer-based material, and   wherein each one of the head parts is configured to be separably interconnected by their respective interconnection portion to the interconnection of either one of the first or second base parts allowing the respective base part to be used over a period of time and to be interconnected with each of the plurality of head parts, one at the time, during said period of time.   
     
     
         19 . The dividable dental care product of  claim 1 , wherein a distance along the central axis between a distal end of the brush head and the mouth of the tubular portion is between 60 mm and 90 mm. 
     
     
         20 . The dividable dental care product of  claim 1 , wherein a distance along the central axis between a distal end of the brush head and the mouth of the tubular portion is between 60 mm and 80 mm.