Movable device, range-finding apparatus, image display apparatus, head-mounted display, wavelength-variable laser unit, and spectroscopic sensor

Patent metadata

Field	Value
Publication number	US-12523864-B2
Application number	US-202318123363-A
Country	US
Kind code	B2
Filing date	Mar 20, 2023
Priority date	Mar 22, 2022
Publication date	Jan 13, 2026
Grant date	Jan 13, 2026

Abstract

A movable device includes: a movable portion; a driving section configured to generate a driving force to move the movable portion; a movement mechanical section; and at least one convex portion. The movement mechanical section includes: a contact portion contacting the movable portion, the contact portion movable in a movement direction by the driving force of the driving section; and multiple concave-convex portions movable with the contact portion in the movement direction. At least one convex portion engaging with corresponding one of the multiple concave-convex portions, said at least one convex portion being static relative to the movement mechanical section in the movement direction.

First claim

The invention claimed is:

1 . A movable device comprising:
a movable portion, and a torsion bar that supports the movable portion; a driving section configured to generate a driving force to move the movable portion; a movement mechanical section including:
a contact portion contacting the movable portion, the contact portion movable in a movement direction by the driving force of the driving section, wherein the contact portion moves in response to a drive of the driving section and tilts the movable portion about a rotation axis; and
multiple concave-convex portions movable with the contact portion in the movement direction,
at least one convex portion engaging with corresponding one of the multiple concave-convex portions, said at least one convex portion being static relative to the movement mechanical section in the movement direction, wherein a torsional stiffness of the torsion bar about the rotation axis is smaller than a stiffness of the at least one convex portion in a direction in which the at least one convex portion faces the multiple concave-convex portions.

2 . The movable device according to claim 1 ,
wherein the corresponding one of the multiple concave-convex portions changes according to a movement of the multiple concave-convex portions.

3 . The movable device according to claim 1 ,
wherein the driving section includes multiple piezoelectric elements on a surface facing the movement mechanical section.

4 . The movable device according to claim 1 ,
wherein the contact portion moves in one rotational direction, a bidirectional rotational direction, or a linear direction.

5 . The movable device according to claim 1 , further comprising:
another driving section configured to generate a driving force to move the driving section, the movable portion, and the movement mechanical section in a scanning direction, wherein the movable portion includes a reflector configured to deflect light in the scanning direction.

6 . The movable device according to claim 1 , further comprising a reflector.

7 . A range-finding apparatus comprising:
the movable device according to claim 6 .

8 . An image display apparatus comprising:
the movable device according to claim 6 .

9 . A head-mounted display comprising:
the movable device according to claim 6 .

10 . A movable device comprising:
a movable portion, and a torsion bar that supports the movable portion; a driving section configured to generate a driving force to move the movable portion; a movement mechanical section including:
a contact portion contacting the movable portion, the contact portion movable in a movement direction by the driving force of the driving section, wherein the contact portion moves in response to a drive of the driving section and tilts the movable portion about a rotation axis; and
multiple concave-convex portions movable with the contact portion,
at least one concave portion engaging with corresponding one of the multiple concave-convex portions, at least one convex portion being static relative to the movement mechanical section in the movement direction, wherein a torsional stiffness of the torsion bar about the rotation axis is smaller than a stiffness of the at least one convex portion in a direction in which the at least one convex portion faces the multiple concave-convex portions.

Assignees

• Fujishima Masayuki
• Ricoh Co Ltd

Inventors

• Fujishima Masayuki

Classifications

• G01S7/4817

  relating to scanning · CPC title

• G02B2027/0178

  Eyeglass type (eyeglass details G02C) · CPC title

• G01J3/06

  Scanning arrangements {arrangements for order-selection} · CPC title

• G01J2003/064

  Use of other elements for scan, e.g. mirror, fixed grating · CPC title

• G02B27/0172

  characterised by optical features · CPC title