Method for manufacturing toothbrush and toothbrush manufactured by the method

A method of manufacturing a toothbrush, comprising:

• producing a bundle of bristles, comprising:
• collecting a plurality of bristles substantially close together;
• fusing and subsequently hardening ends of the collected bristles to each other by cutting the ends of the collected bristles using a heated cutter to thus produce a bundle of bristles;
• and
• cutting the fused bundle of bristles into a plurality of unit bundles of bristles having cross-sectional areas corresponding to sizes of setting holes of a head insert of a toothbrush;
• inserting parts of the unit bundles of bristles other than the fused parts thereof into corresponding setting holes of the head insert such that the fused parts of the unit bundles of bristles are disposed on a lower surface of the head insert;
• adhering the fused parts of the unit bundles of bristles to the head insert;
• and
• coupling the head insert having the unit bundles of bristles adhered thereto to a head part of the toothbrush.

A method of manufacturing a toothbrush, comprising:

• inserting bristles into a setting hole of a toothbrush head insert such that lower parts of the bristles are disposed on a lower surface of the head insert;
• adhering the lower parts of the bristles to the lower surface of the head insert using a heating apparatus;
• and
• coupling the head insert having the bristles fused thereto to a head part of the toothbrush,
• wherein the inserting comprises inserting the bristles into the setting hole through a jig having a guide hole corresponding to the setting hole.

A method of manufacturing a toothbrush, comprising:

• inserting bristles into a setting hole of a toothbrush head insert such that lower parts of the bristles are disposed on a lower surface of the head insert
• adhering the bristles to the head insert by application of adhesive to a lower surface of the head insert and a hardening of the adhesive;
• and
• coupling the head insert having the bristles adhered thereto to a head part of the toothbrush.

A toothbrush, comprising:

• bristles, which are cut and fused to each other by a heated cutter at similar respective ends thereof, and which are arranged in a bundle having a predefined cross-sectional area;
• a head insert formed to define an inserting hole having a lower surface recessed from an upper surface thereof in which the bristles are set with the respective ends of the bristles adhered to the inserting hole lower surface;
• and
• a head part to which the head insert is coupled.

A toothbrush manufacturing method, comprising:

• collecting bristles in a bundle thereof, each bristle having a first end to clean a user tooth and a second end opposite the first end;
• cutting the bundle proximate to the second ends using a heated cutter to thereby fuse the bristles;
• forming the bundle into a unit having a predefined cross-sectional shape;
• guiding the unit with the first ends leading the second ends into and through a setting hole formed in a head insert and having a shape corresponding to the unit cross-sectional shape such that the second ends align with a head insert recessed surface;
• adhering the second ends to the recessed surface;
• and
• inserting the head insert into a toothbrush head.