US 12,285,158 B2
Intraoral measurement device
Takashi Kurosawa, Hachioji (JP); Atsushi Nagaoka, Okazaki (JP); Yoshihiro Inagaki, Hachioji (JP); and Mohdmakhtar Nurnabila, Hachioji (JP)
Assigned to Konica Minolta, Inc., Tokyo (JP)
Filed by Konica Minolta, Inc., Tokyo (JP)
Filed on Apr. 28, 2022, as Appl. No. 17/731,352.
Claims priority of application No. 2021-080104 (JP), filed on May 11, 2021.
Prior Publication US 2022/0361742 A1, Nov. 17, 2022
Int. Cl. A61B 1/24 (2006.01); A61B 5/00 (2006.01)
CPC A61B 1/24 (2013.01) [A61B 5/4547 (2013.01); A61B 5/4552 (2013.01)] 14 Claims
OG exemplary drawing
 
1. An intraoral measurement device comprising:
a prism having a rectangular column shape and having a base end side and a distal end side, the distal end side facing a measurement target, the prism including:
a first optical surface;
a second optical surface opposite the first optical surface, the second optical surface having an objective surface that faces the measurement target;
a third optical surface inclined relative to the first optical surface; and
a first non-optical surface between the first optical surface and the second optical surface;
a device main body that holds the base end side of the prism by a housing, the housing accommodating an illumination member and an imaging member;
a cover member that is attached to the device main body in a state of covering, with a space part interposed in between, the distal end side of the prism, the cover member including a light transmission window that faces the measurement target;
a first heat transfer member that is fixed to the first non-optical surface of the prism, extends from the device main body along the first non-optical surface of the prism, has a protruding end that protrudes from the first non-optical surface of the prism to the light transmission window of the cover member, and transfers heat of the device main body to the light transmission window through abutment of the protruding end against the light transmission window of the cover member;
a first positioning member provided on the first non-optical surface of the prism, the first positioning member including a protruding portion that protrudes from the first non-optical surface in a direction opposite to the protruding end of the first heat transfer member is provided; and
a first elastic member between the protruding portion of the first positioning member and an inner wall of the cover member, wherein
the first positioning member presses the prism and the protruding end of the first heat transfer member toward the light transmission window, by being pressed toward the protruding end by the elastic member.