Junction box of a recessed luminaire for installation in shallow spaces

Patent metadata

Field	Value
Publication number	US-9979169-B1
Application number	US-201715587285-A
Country	US
Kind code	B1
Filing date	May 4, 2017
Priority date	May 4, 2017
Publication date	May 22, 2018
Grant date	May 22, 2018

Abstract

A junction box includes a first cover plate that covers a first open side defined by a main body, and a second cover plate that covers a second open side defined by the main body. The second cover plate includes a mounting pad to attach an electrical component thereto. The electrical component is disposed in an inner cavity defined by the main body when the second cover plate is in a closed position. Further, the junction box includes a fastening device that retains the first cover plate and the second cover plate in the closed position and operates without interfering with a mounting structure in which the junction box is disposed. Furthermore, the junction box includes chamfer walls and wire traps disposed thereon to receive and pass electrical wiring cables into the junction box therethrough.

First claim

What is claimed is:

1. A junction box comprising:
a main body comprising a top wall, a base wall, a pair of junction box side walls and one or more chamfer walls, the main body defining an open side on one side of the junction box;
one or more wire traps disposed on at least one chamfer wall of the one or more chamfer walls, each wire trap to receive and pass an electrical wiring cable therethrough; and
a cover plate that comprises:
a cover plate side wall and a component mounting wall that extends substantially perpendicular to the side wall from at least a portion of a bottom edge of the side wall, and
a mounting pad formed in the component mounting wall,
wherein the cover plate is removably coupled to the main body of the junction box and covers the open side when the cover plate is in the closed position, and receives an electrical component on the mounting pad, the electrical component associated with an operation of a luminaire.

2. The junction box of claim 1 :
wherein the main body defines a second open side and an inner cavity that is disposed between the open side and the second open side,
wherein the electrical component is disposed in the inner cavity when the cover plate is in the closed position,
wherein the cover plate and the electrical component attached thereto are movable and accessible as a single unit.

3. The junction box of claim 2 , wherein the electrical component is a transformer.

4. The junction box of claim 2 , wherein the junction box further comprises:
a second cover plate that is hingedly and removably coupled to the main body and covers the second open side when the other cover plate is in a closed position; and
a fastening device that comprises:
an elongated body that is coupled to the main body of the junction box, and
a pair of fastening features that are removably coupled to the cover plate and the other cover plate to retain the cover plate and the other cover plate in the closed position,
wherein the pair of fastening features are disposed at a distance below the elongated body from opposite ends of the elongated body such that the pair of fastening features operate without interference with a mounting structure in which the junction box is disposed.

5. The junction box of claim 4 :
wherein the fastening device further comprises a regressed neck structure that is disposed between each fastening feature and the elongated body of the fastening device such that the regressed neck structure positions the respective fastening device at the distance below the elongated body,
wherein the regressed neck structure extends substantially perpendicular to the elongated body of the fastening device from a respective end of the elongated body, and
wherein the pair of fastening features include spring clips.

6. The junction box of claim 5 :
wherein each of the cover plate and the second cover plate comprises a notch and an opening formed adjacent to and below the notch, and
wherein, when the junction box is assembled, the notch receives the regressed neck structure of the fastening device and the opening receives and engages the respective fastening feature of the fastening device.

7. The junction box of claim 2 :
wherein the second cover plate comprises a second side wall, a second bottom wall that extends substantially perpendicular to the second side wall from a bottom edge of the side wall, and one or more coupling features that are disposed at a distal end of the second bottom wall that is away from the second side wall,
wherein the one or more coupling features of the second cover plate engage complementary coupling features in the base wall of the main body to hingedly and removably couple the second cover plate to the main body,
wherein the second cover plate that is hingedly and removably coupled to the main body is rotatable about the base wall between the closed position and an open position, and
wherein in the open position, the second cover plate rotates away from the main body such that the second side wall is substantially parallel to the base wall of the main body and the second open side and the inner cavity are exposed.

8. The junction box of claim 7 , wherein the one or more coupling features include a tab with a hooked end.

9. The junction box of claim 1 :
wherein the cover plate side wall comprises a pair of mounting feet that engage complementary mating slots in the base wall of the main body to removably couple the cover plate to the main body,
wherein the cover plate that is removably coupled to the main body is rotatable about the base wall between the closed position and a partially open position, and
wherein in the partially open position, the cover plate rotates away from the main body such that the open side and the inner cavity is partially exposed.

10. The junction box of claim 1 :
wherein the component mounting wall of the cover plate includes a first regressed surface and a second regressed surface, the first and second regressed surfaces disposed on opposite sides of the mounting pad, and
wherein each regressed surface defines a cavity to receive at least a portion of a coupling feature of a second cover plate that is used to hingedly and removably couple the second cover plate to the main body, the second cover plate to cover a second open side defined by the main body.

11. The junction box of claim 1 :
wherein the cover plate is coupled to the main body such that the component mounting wall of the cover plate is disposed on the base wall of the main body and above at least a portion of a second bottom wall of a second cover plate such that the cover plate prevents the second cover plate from decoupling from the base wall when the second cover plate rotates away from the main body to an open position, and
wherein the second cover plate rotates to an open position when a fastening feature that retains the second cover plate in the closed position is released.

12. The junction box of claim 1 , wherein the electrical wiring cable is substantially horizontally oriented.

13. The junction box of claim 1 , wherein the electrical wiring cable is substantially vertically oriented.

14. A junction box comprising:
a main body comprising a top wall, a base wall, a first side wall connected to a first chamfer wall, and a second side wall connected to a second chamfer wall, the main body defining a first open side and a second open side;
a first cover plate that is hingedly and removably coupled to the main body and that covers the first open side defined by the main body when the first cover plate is in a closed position;
a second cover plate that is removably coupled to the main body and that covers the second open side defined by the main body when the second cover plate is in the closed position; and
a fastening device that comprises a pair of fastening features that retain the first cover plate and the second cover plate in the closed position and operate without interfering with a mounting structure in which the junction box is disposed when the pair of fastening features are released.

15. The junction box of claim 14 :
wherein the junction box further comprises one or more wire traps disposed on at least one of the first or second chamfer walls, each wire trap to receive and pass an electrical wiring cable therethrough, and
wherein the second cover plate comprises a mounting pad that receives an electrical component such that the second cover plate and the electrical component are movable and accessible as a single unit, the electrical component being associated with an operation of a luminaire.

Assignees

• Cooper Technologies Co

Inventors

• Wronski Grzegorz
• Lin Zhihong
• Zhao Wei
• Ernst Oliver

Classifications

• F21V21/043

  actuated by screwing · CPC title

• H02G3/14

  Fastening of cover or lid to box · CPC title

• H02G3/081 Primary

  Bases, casings or covers · CPC title

• F21V21/048

  Mounting arrangements for fastening lighting devices to false ceiling frameworks · CPC title

• H02G3/20

  Ceiling roses {or other lighting sets} · CPC title