LOW LABOR ENCLOSURE ASSEMBLY

Abstract

There is disclosed a base member for holding, without screws, a printed circuit board having conductive traces and electronic components and which can fit into an electric outlet box. The base member has walls which define a cavity where at least one wall of the cavity has a rib, the top of which functions as a stop for the printed circuit board. A cap having snap features adapted to engage the walls of the cavity restricts removal of the printed circuit board when snapped into position on top of the printed circuit board. The cap conceals the electronics on the printed circuit board and has at least one rib on its bottom surface to apply pressure to the printed circuit board assembly to help hold it in place. An aperture in the cap provides access to a pin header which is electrically connected to the printed circuit board. A screw terminal block is provided to connect the terminals on the pin header to a sensor. The printed circuit board has one edge an open side hour glass shape aperture which provides strain relief for wires from the printed circuit board. Opposite ends of the aperture hold two wires captive and the space between the two wires holds captive a third wire.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

Other aspects, features, and advantages of the present invention will become more fully apparent from the following detailed description, the appended claim, and the accompanying drawings in which similar elements are given similar reference numerals where:

FIG. 1 shows a prior art base for mounting a low voltage sensor such as an occupancy sensor to a ceiling;

FIG. 2 is an exploded view of a prior art octagon electrical outlet box, a base and a cover for receiving a sensor;

FIG. 3 is a partial exploded perspective view showing a printed circuit board assembly being positioned into a base member;

FIG. 4 is an exploded perspective view of the printed circuit board mounted within the base member, a snap on cap which fits on top of the printed circuit board and the components mounted thereon and a terminal block for connecting the printed circuit board to a device such as a sensor;

FIG. 5 is a top view of the printed circuit board having an open side hour glass shape aperture for providing strain relief to wires captured therein; and

FIG. 6 is an exploded partial perspective view showing wires connected to components on the printed circuit board being held captive by the open side hour glass shape aperture on the printed circuit board of FIG. 5.

Claims

1. An assemblage comprising: a base member having a cavity with walls for receiving a printed circuit board;a printed circuit board sized to fit within said cavity;a cap member sized to fit within said cavity;wherein said cap member when positioned in said cavity over said printed circuit board engages at least one side wall of said cavity to hold said printed circuit board in said cavity without screws.

2. The assemblage of claim 1 wherein said base member has a stop member which limits the distance that the printed circuit board can move into said cavity.

3. The assemblage of claim 2 wherein said stop member comprises at least one outwardly projecting protrusion on a wall of said base member to limit the distance that said printed circuit board can be advance into said cavity.

4. The assemblage of claim 2 wherein said cap member has at least one clip positioned to engage a wall of said cavity to restrict removal of the printed circuit board from said cavity.

5. The assemblage of claim 4 wherein said walls of said cavity of said base member are sized to fit within an electric outlet box.

6. The assemblage of claim 4 wherein said walls of said cavity of said base have an octagon shape.

7. The assemblage of claim 4 wherein said cap member, when placed over said printed circuit board, covers said board.

8. The assemblage of claim 4 further comprising: a pin header coupled to said printed circuit board for connecting a sensor to said printed circuit board.

9. The assemblage of claim 7 further comprising: a pin header coupled to said printed circuit board and projects through said cap member to connect a sensor to said printed circuit board.

10. The assemblage of claim 9 wherein said pin header is slidably coupled to a terminal block.