US 12,434,421 B2
3D drawing arrangement
Honghui Wei, Yuyao (CN)
Filed by Honghui Wei, Yuyao (CN)
Filed on Jan. 26, 2023, as Appl. No. 18/159,977.
Application 18/159,977 is a continuation in part of application No. 17/865,385, filed on Jul. 15, 2022, granted, now 11,590,704.
Prior Publication US 2024/0017465 A1, Jan. 18, 2024
Int. Cl. B29C 48/92 (2019.01); B29C 48/02 (2019.01); B29C 64/118 (2017.01); B29C 64/393 (2017.01); B33Y 30/00 (2015.01); B33Y 50/02 (2015.01)
CPC B29C 48/92 (2019.02) [B29C 48/02 (2019.02); B29C 64/118 (2017.08); B29C 64/393 (2017.08); B33Y 30/00 (2014.12); B33Y 50/02 (2014.12); B29C 2948/92304 (2019.02); B29C 2948/926 (2019.02); B29C 2948/92704 (2019.02); B29C 2948/92876 (2019.02)] 14 Claims
OG exemplary drawing
 
1. A 3D drawing arrangement for producing a melted material flow by a filament, comprising:
a feeding passage;
a heater;
a filament moving system;
a controller which comprises a control circuit and a finger detector electrically connected to said control circuit, wherein when said finger detector detects a presence of a finger of a user, said control circuit starts operation of said filament moving system to feed the filament to said heater along said feeding passage, so that the filament is heated and melted by said heater to produce the melted material flow, wherein said controller comprises two finger detectors for detecting movement of the finger of the user, so as to control operation of said filament moving system, wherein each of said finger detectors comprises a light emitter for emitting a detecting light and a light receiver for receiving the detecting light which is reflected by the finger of the user; and wherein said two finger detectors comprise a first finger detector and a second finger detector, wherein said first finger detector is arranged distal to said heater wherein said second finger detector is arranged adjacent to said heater, wherein movement of the finger of user from a position above said first finger detector to a position above said second finger detector and movement of the finger of the user from the position above said second finger detector to the position above said first finger detector are configured for controlling different operations of said filament moving system.