Lens adjusting mechanism

Patent metadata

Field	Value
Publication number	US-11378767-B2
Application number	US-202017109202-A
Country	US
Kind code	B2
Filing date	Dec 2, 2020
Priority date	Apr 27, 2017
Publication date	Jul 5, 2022
Grant date	Jul 5, 2022

Abstract

A lens adjusting mechanism includes a light-valve case, a lens case, one fastener, and a leaf spring assembly. The light-valve case has an emitting opening and a first opening edge, disposed on the peripheral portion of the emitting opening. The lens case has a light-path entrance and a light-path exit. The lens case also has a second opening edge. The second opening edge is disposed on the peripheral portion of the light-path entrance. The fastener is connected between the first opening edge and the second opening edge. The leaf spring assembly has at least one leaf contact. The leaf spring assembly is disposed between the first opening edge and the second opening edge. The leaf contact contacts the first opening edge or the second opening edge. The fastener is used to adjust the distance between the first opening edge and the second opening edge.

First claim

What is claimed is:

1. A lens adjusting mechanism, comprising:
a light-valve case, having a light emitting opening and a first opening edge adjacent to the light emitting opening;
a lens case, having a light-path entrance, a light-path exit and a second opening edge adjacent to the light-path entrance;
at least one fastener to connect the first opening edge and the second opening edge; and
a spring assembly, having at least one elastic plate contact contacting against the first opening edge and the second opening edge, the at least one elastic plate contact capable of exerting a pushing force on the first opening edge or the second opening edge,
wherein the fastener is capable of adjusting a distance between the first opening edge and the second opening edge.

2. The lens adjusting mechanism according to claim 1 , wherein the spring assembly is a plate spring.

3. The lens adjusting mechanism according to claim 2 , wherein the plate spring further comprises a substrate, the at least one elastic plate contact comprises a plurality of elastic plate contacts, the substrate has a through hole, and the elastic plate contacts are disposed adjacent to the through hole.

4. The lens adjusting mechanism according to claim 3 , wherein the plate spring comprises a stress dispersion hole disposed adjacent to a location of one of the elastic plate contacts connecting with the substrate.

5. The lens adjusting mechanism according to claim 3 , wherein two adjacent fasteners are capable of adjusting the distance.

6. The lens adjusting mechanism according to claim 3 , wherein one of the at least one fastener is capable of fixing rather than adjusting the distance.

7. The lens adjusting mechanism according to claim 6 , wherein the substrate includes a gap, and the gap is corresponding to the one of the at least one fastener.

8. The lens adjusting mechanism according to claim 3 , wherein the at least one fastener includes three fasteners disposed corresponding to three of the elastic plate contacts of the plate spring.

9. The lens adjusting mechanism according to claim 3 , wherein the number of the elastic plate contacts is four, the at least one fastener includes three fasteners, two of the three fasteners are positioned corresponding to two adjacent corners of the plate spring, the other fastener is positioned corresponding to a middle region of the substrate away from the two adjacent corners of the plate spring, and two of the elastic plate contacts are disposed symmetrically with respect to the fastener at the middle region of the substrate on the plate spring.

10. The lens adjusting mechanism according to claim 3 , wherein the lens adjusting mechanism satisfies one of the following: (1) the substrate and the elastic plate contacts are a one-piece structure; (2) the elastic plate contacts are fixed on the substrate by thread locking; (3) the at least one fastener has only one assembling direction from one side of the plate spring to an opposite side of the plate spring; (4) the fastener is a screw, a bolt or a clip; (5) material of the plate spring is SUS301 stainless steel; and (6) a length of one of the elastic plate contacts is longer than 8 centimeter.

11. A lens adjusting mechanism, comprising:
a lens carrier, having a first light-path through hole, a second light-path through hole, and a through-hole edge adjacent to the first light-path through hole;
a thin elastic element, having at least one elastic hook attached to the through-hole edge; and
at least one combiner for combining the through-hole edge and the thin elastic element,
wherein the combiner is capable of adjusting a distance between the thin elastic element and the through-hole edge.

12. The lens adjusting mechanism according to claim 11 , wherein the combiner is a fastener, and the thin elastic element is a plate spring.

13. The lens adjusting mechanism according to claim 12 , wherein the plate spring comprises a substrate and a plurality of contact parts, the substrate has a through hole, and the contact parts are disposed adjacent to the through hole.

14. The lens adjusting mechanism according to claim 12 , wherein the plate spring comprises a stress dispersion hole disposed adjacent to a location of one of the contact parts connecting with the substrate.

15. The lens adjusting mechanism according to claim 12 , wherein the distance is adjusted by two adjacent fasteners.

16. The lens adjusting mechanism according to claim 12 , wherein one of the at least one fastener is to fix but not to adjust the distance.

17. The lens adjusting mechanism according to claim 12 , wherein the at least one fastener includes three fasteners disposed corresponding to three contact parts of the plate spring.

18. The lens adjusting mechanism according to claim 12 , wherein the plate spring comprises four contact parts, the at least one fastener includes three fasteners, two of the three fasteners are positioned corresponding to two adjacent corners of the plate spring, the other fastener is positioned corresponding to a middle region of the substrate away from the two adjacent corners of the plate spring, and two of the contact parts are disposed symmetrically with respect to the fastener at the middle region of the substrate on the plate spring.

19. The lens adjusting mechanism according to claim 12 , wherein the lens adjusting mechanism satisfies one of the following: (1) the substrate and the contact parts are a one-piece structure; (2) the contact parts is fixed on the substrate by thread locking; (3) the at least one fastener has only one assembling direction from one side of the plate spring to an opposite side of the plate spring; (4) the fastener is a screw, a bolt or a clip; (5) material of the plate spring is SUS301 stainless steel; and (6) a length of one of the contact parts is longer than 8 centimeter.

20. A lens adjusting mechanism, comprising:
a light-valve case, having a light emitting opening and a first edge adjacent to the light emitting opening;
a projecting lens case, having a first opening, a second opening, and a second edge adjacent to the first opening;
at least one fastener to connect the first edge and the second edge; and
an elastic element, comprising a spring abutment, a spring, and a spring head, an end of the spring contacts against the spring abutment, the other end of the spring contacts against the spring head, the spring abutment is fixed on one of the first edge and the second edge, and the spring head contacts against the other of the first edge and the second edge,
wherein the fastener is to adjust a distance between the first edge and the second edge, the lens adjusting mechanism further comprises a light-valve and a lens module, the light valve is disposed on the light-valve case, the projecting lens case is to hold the lens module, the spring abutment of every of the at least one elastic element has the same direction toward the spring head, and the fastener is a screw, a bolt or a clip.

Assignees

• Young Optics Inc

Inventors

• Chang Yu-Chen
• Lee Chia-Chang

Classifications

• G02B7/023 Primary

  permitting adjustment · CPC title

• G02B7/026

  using retaining rings or springs (G02B7/027 takes precedence) · CPC title

• G02B13/16

  for use in conjunction with image converters or intensifiers {, or for use with projectors, e.g. objectives for projection TV} · CPC title

• G03B21/142 Primary

  Adjusting of projection optics · CPC title