Ceiling hanger

• US 9,575,395 B2
• Filed: 03/26/2015
• Issued: 02/21/2017
• Est. Priority Date: 04/06/2012
• Status: Active Grant

• Current Assignee: Seiko Epson Corporation (Seiko Group)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: Unno, Teruhiko
• Primary Examiner(s): GARFT, CHRISTOPHER
• Application Number:
  US14/669,839
• Publication Number:
  US 20150198284A1
• Time in Patent Office: 698 Days
• Field of Search: 352/34, 352/243
• US Class Current: 1/1
• CPC Class Codes: F16M 11/105 the horizontal axis being the roll axis, e.g. for creating a landscape-portrait rotation
• CPC Class Codes: F16M 11/2014 around a vertical axis F16M11/2035 takes precedence
• CPC Class Codes: F16M 11/2021 around a horizontal axis F16M11/2035 takes precedence
• CPC Class Codes: F16M 13/027 Ceiling supports
• CPC Class Codes: F16M 7/00 Details of attaching or adjusting engine beds, frames, or supporting-legs on foundation or base; Attaching non-moving engine parts, e.g. cylinder blocks elastic or equivalent mounting for absorbing vibrations F16F, especially F16F15/04
• CPC Class Codes: G03B 21/14 Details
• CPC Class Codes: H02G 3/30 Installations of cables or lines on walls, floors or ceilings

Abstract

A ceiling hanger includes: a first plate fixed to a ceiling surface; a second plate forming a first rotation axis in the up-down direction after fitted to the first plate, and allowing control in the horizontal direction; a third plate forming a second rotation axis in the front-rear direction after fitted to the second plate, and allowing control in the left-right direction; and a fourth plate fixing a projector, forming a third rotation axis in the left-right direction after fitted to the third plate, and allowing control in the up-down direction.

Claims

1. A ceiling hanger for a projector, comprising:

a first plate fixed to a ceiling surface;

a second plate positioned on the ceiling surface together with the first plate, wherein the second plate forms a first rotation axis having a rotation axis in an up-down direction, and allows control in a horizontal direction around the first rotation axis, the second plate including first and second members extending in the up-down direction;

a third plate mounted to the first and second members of the second plate, a second rotation axis, having a rotation axis in a front-rear direction after being fitted to the second plate, extending through a portion of the first and second members and the third plate, and allowing control in a left-right direction around the second rotation axis, the third plate include a holding portion extending in the up-down direction, the holding portion including a recess open in the up-down direction; and

a fourth plate fixed to the projector, the fourth plate including a member extending in the up-down direction and a support shaft which is held in the recess to suspend the fourth plate from the third plate with the member extending through a main body member of the third plate in the up-down direction after the fourth plate is fitted to the third plate, the support shaft forming a third rotation axis having a rotation axis in the left-right direction after being fitted to the third plate, and allowing control in the up-down direction around the third rotation axis.

2. The ceiling hanger according to claim 1, wherein:

the first plate has either one of a cylindrical portion and an opening;

the second plate has the other of the cylindrical portion and the opening; and

the first plate and the second plate having the one and the other of the cylindrical portion and the opening, respectively, produce the first rotation axis.

3. The ceiling hanger according to claim 1, wherein the third plate produces the second rotation axis via a screw member.

4. The ceiling hanger according to claim 1, wherein the third plate has an opening, wherein a position of the support shaft held by the holding portion can be viewed through the opening.

5. The ceiling hanger according to claim 1, wherein:

either one of the first plate and the second plate has a first screw member disposed substantially perpendicular to the first rotation axis; and

a control in the horizontal direction is carried out by rotating the first screw member provided on the one plate in abutment with the other plate.

6. The ceiling hanger according to claim 1, wherein:

either one of the second plate and the third plate has a second screw member positioned substantially perpendicular to the second rotation axis; and

a control in the left-right direction is carried out by rotating the second screw member provided on one of either one of the second plate and the third plate in abutment with the other of either one of the second plate and the third plate.

7. The ceiling hanger according to claim 1, further comprising:

a screw member which fixes the second plate and the third plate,

wherein

either one of the second plate and the third plate has a screwing portion formed substantially in parallel with the second rotation axis and engaging with the screw member, and

the other of the second plate and the third plate has a long hole formed around the second rotation axis and guiding the screw member.

8. The ceiling hanger according to claim 1, wherein:

either one of the third plate and the fourth plate has a third screw member disposed substantially perpendicular to the third rotation axis; and

a control in the up-down direction is carried out by rotating the third screw member provided on one of either one of the third plate and the fourth plate in abutment with the other of either one of the third plate and the fourth plate.

9. The ceiling hanger according to claim 1, further comprising:

a screw member which fixes the third plate and the fourth plate,

wherein

either one of the third plate and the fourth plate has a screwing portion formed substantially in parallel with the third rotation axis and engaging with the screw member, and

the other of the third plate and the fourth plate has a long hole formed around the third rotation axis and guiding the screw member.

10. The ceiling hanger according to claim 1, wherein:

the first plate has either one of a cylindrical portion and a first opening which receives insertion of the cylindrical portion, the second plate has the other of the cylindrical portion and the first opening, so that the first plate and the second plate having one and the other of the cylindrical portion and the first opening, respectively, produce the first rotation axis;

the third plate has a second opening in an area opposed to the first opening; and

a cable connected with the projector is inserted through the cylindrical portion, the first opening, and the second opening.

11. The ceiling hanger according to claim 10, wherein the fourth plate has a clearance securing portion provided in an area where the cable is extended to secure a clearance between the fourth plate and a surroundings of the second opening in a height direction.

12. The ceiling hanger according to claim 11, wherein the second opening is disposed offset toward an area where the cable is extended.

13. The ceiling hanger according to claim 1, wherein the third plate has a guide which guides the support shaft toward the holding portion.

14. The ceiling hanger according to claim 1, wherein a cover member which covers side surfaces of the first plate, the second plate, and the third plate is disposed between the ceiling surface and the projector fixed to the fourth plate.

15. The ceiling hanger according to claim 14, wherein the cover member is so sized as to avoid a movable range of the second plate, the third plate, and the fourth plate for control.

16. The ceiling hanger according to claim 14, wherein the cover member covers a component operated at a time of control.

17. The ceiling hanger according to claim 14, wherein:

any of the first plate through the fourth plate has a fixing portion which fixes the cover member;

the cover member has a first cover covering side surfaces on the front side, and a second cover covering the side surfaces on the rear side; and

the first cover and the second cover are arranged in the left-right direction and fixed to the fixing portion.

18. The ceiling hanger according to claim 14, wherein the cover member is made of synthetic resin.