Electric lighting fixture lock

Abstract

An improved lock used with a recessed lighting fixture is the present subject matter. The fixture is adapted for installation in a mounting aperture in a ceiling. The fixture includes a frame which has a retainer ring for connection to the outside or bottom of the ceiling. A unitary resilient lock is pivotly mounted in the frame and is also movably mounted in the frame. The lock includes a head engageable with the interior or upper surface of the ceiling to hold the frame in the mounting aperture. The head includes a curl having a lip extending outwardly from the frame. The lock includes a latch which releasably engages the frame to hold the lock in one position relative to the frame and thereby hold the frame in the mounting aperture. The lock includes an ear engageable with the frame to retain the lock in the frame during shipment of the frame to a site for installation in a ceiling.

Description

BACKGROUND OF THE INVENTION

Recessed electric lighting fixtures typically are installed during the construction or remodeling of a building. In some instances, it is found to be desirable to install recessed lighting in an existing structure. It is necessary to support a recessed lighting fixture on an interior structural surface, such as, a ceiling in some installations. An aperture or mounting opening is cut in the ceiling in certain installations. The aperture is of a size just large enough to receive the electric lighting fixture. A frame for the electric lighting fixture is positioned in the aperture. Locks are connected to the frame and those locks are moved into position to engage the interior of the ceiling to prevent the lighting fixture from falling out through the aperture.

The locks that have been heretofore used in such installations are of a variety of types. One type of such a lock is a lock made of a spring steel. The spring steel lock is inserted through an opening in the frame, and a resilient arm of the lock engages the upper side of the ceiling to hold the frame in the ceiling aperture. One of the problems which has been encountered with such locks is that vibration of the structure often causes the locks to release and allow the fixture to fall out of the ceiling. One solution to overcome the problem of vibration of the structure is to drive a screw through the spring lock after it is placed into engagement with the interior of the ceiling to secure the lock to the frame. Another problem encountered with such locks is that when the locks are shipped from the manufacturer to the site, locks often become loose enough to disengage the frame and become lost during transit or unpacking of the fixture. It is desirable to provide a lock for a recessed lighting fixture which lock is held securely in the frame during shipment and initial installation, and the lock securely holds the frame in position in a ceiling aperture.

SUMMARY OF THE INVENTION

An improved lock is used with a recessed electric lighting fixture, which fixture is adapted for installation in a mounting aperture in an interior structural surface, such as, a ceiling. The fixture includes a frame. The frame has a retainer ring for connection to the outside or bottom of the ceiling. The frame has a holding aperture and a locking aperture spaced from the holding aperture. The lock is pivotly mounted in the holding aperture and movably mounted in the locking aperture. The lock is engageable with the interior or upper surface of the ceiling to hold the frame in the mounting aperture. A latch which is part of the lock releasably engages the frame to hold the lock in one position relative to the frame and thereby hold the frame in the mounting aperture. The lock includes a curl at one end cooperative with an integral ear engageable with the frame to retain the lock in the frame during shipment of the frame to a site for installation in a ceiling.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a cross sectional view through a conventional ceiling showing a recessed lighting fixture having a frame mounted in an aperture in the ceiling with two locks embodying the instant invention holding the frame in the aperture;

FIG. 2 is an enlarged cross sectional view of one of the locks of FIG. 1 showing the position of a screwdriver blade in engagement with a latch used for releasing the lock from the frame to allow removal of the frame from the opening;

FIG. 3 is a side elevational view showing the screwdriver blade of FIG. 2 contacting the latch for release of the lock;

FIG. 4 is an enlarged cross sectional view showing two locks in a retracted position in the frame and the frame partially positioned in the ceiling aperture;

FIG. 5 is an enlarged cross sectional view of one of the locks of FIG. 4 ;

FIG. 6 is an enlarged plan view of a fragmentary portion of one of the locks showing a head and ears;

FIG. 7 is an enlarged cross sectional view similar to FIG. 2 showing a latch in engagement with the frame to hold the lock in position relative to the frame;

FIG. 8 is an enlarged fragmentary cross sectional view of a head portion of one of the locks of FIG. 4 showing a curl and an ear in engagement with the frame;

FIG. 9 is a cross sectional view taken on Line 9 — 9 of FIG. 6 ;

FIG. 10 is an enlarged fragmentary end elevational view of the lock shown in FIG. 7 ;

FIG. 11 is an enlarged fragmentary elevational view taken on Line 11 — 11 of FIG. 2 ;

FIG. 12 is an enlarged fragmentary partial cross sectional view taken on Line 12 — 12 of FIG. 4 ; and

FIG. 13 is an enlarged partial cross sectional view taken on Line 13 — 13 of FIG. 11 .

DESCRIPTION OF THE PREFERRED EMBODIMENT

Referring now to the drawings and especially to FIG. 1 , a recessed electric lighting fixture 12 is shown mounted in a mounting aperture 14 of a conventional interior structural surface, namely a ceiling 16 . The fixture generally includes a frame 18 locked into aperture 14 by a pair of identical locks 20 and 22 , each of which is a specific embodiment of the herein disclosed invention. A trim ring assembly 24 is mounted in the frame and supports a conventional annular baffle 26 . A conventional lamp receptacle 28 is held in position by a receptacle clip 30 . The receptacle clip is secured to a receptacle mounting plate 32 which is in turn secured to frame 18 . A conventional lamp 34 is mounted in receptacle 28 and positioned within baffle 26 .

Frame 18 of the recessed electric lighting fixture 12 is disclosed in detail in a co-pending patent application entitled, “Open Mounting Frame”, the inventor is Thomas J. DeCicco, is Ser. No. 08/936,222, and filing date of Sept. 29, 1997. The frame includes an annular base ring retainer 36 . Retainer 36 includes an annulus 38 and an annular short crown 40 formed integral with the annulus. Two flat columnar uprights 42 and 44 are connected to crown 40 and are diametrically opposed to each other. Uprights 42 and 44 are connected to the crown by conventional rivets 46 and 48 , respectively. A bridge 50 is formed integral with the ends of uprights 42 and 44 to connect the uprights. Receptacle plate 32 is fixed to bridge 50 by conventional screws 52 .

A conventional torsion spring receptacle 54 is connected to each of the uprights 42 and 44 by conventional rivets 56 . The trim ring includes a trim ring face 58 with a cylindrical baffle housing 60 formed integral therewith. The baffle housing has a pair of diametrically opposed spring studs 62 formed thereon. A conventional torsion spring 64 is mounted on each of spring studs 62 . The construction of each torsion spring is conventional and well known and includes a pair of arms positionable in the respective receptacle 54 to hold the trim ring and baffle in position.

The construction of locks 20 and 22 is identical and like numbers are used for the same parts. Each of the locks is formed from a single piece of conventional flat spring steel so that the parts of the lock are resilient. Each lock includes a post 66 . Each post includes a pillar 68 with an off-set 70 formed integral with the lower end thereof. A leg 72 is formed integral with off-set 70 . An arcuate resilient retainer 74 is formed integral with the upper end of the post. Each arcuate retainer includes a curved elongated resilient body 75 having a pair of parallel elongated edges. A latch 76 is integral with and adjacent to one end of each body and a head 78 is integral with the other end. Each latch 76 includes a cantilever latch arm 80 formed integral with the body of the respective arcuate retainer. A latch hook 82 is formed integral with the free end of each latch arm. Each latch hook is positioned in a T-shaped latch head opening 84 in the pillar.

Off-set 48 has a pair of opposed identical notches 86 , which extend into the upper portion of respective leg 72 , as may be seen in FIG. 11 . Each of the columnar uprights 42 and 44 has a T-shaped holding aperture 88 , which receives post 66 and retains the respective lock in position. Each of the columnar uprights 42 and 46 has a T-shaped locking aperture 90 positioned above the respective holding aperture 88 . Each locking aperture 90 receives its respective arcuate retainer 74 .

Head 78 of each of the locks includes a curl 92 having a lip 94 extending outwardly away from the frame to allow the head freedom to move outward away from the frame when the head is placed into locking engagement with ceiling 16 . The curl includes an integral pad 96 for engagement with the upper surface of the ceiling to act as a skate on the upper surface as the head moves outward during locking. A flat portion 98 connects the curl with the body. A pair of upwardly extending ears 100 and 102 is formed integral with each of the parallel edges of the body. A sloped face 104 is formed integral with ear 100 and a like sloped face 106 is formed integral with ear 102 . The distance from the sloped faces 104 and 106 to lip 94 of curl 92 is substantially equal to the thickness of the material of the frame and in particular the flat columnar upright of the frame, so that the head may be locked to the upright by the coaction of the ears and the lip of the curl.

Each of the locks is installed in frame 18 with the respective leg in respective slot 88 . Each head 78 is positioned in the respective locking aperture 90 . Lip 94 of curl 92 engages one side of an adjacent portion of the respective columnar upright, which is part of the frame. The sloped faces of ears 100 and 102 engage the opposed side of the adjacent portion of the respective columnar upright to lock each head to the respective upright thereby preventing each head from sliding out of the respective aperture. Inasmuch as the lock is made of unitary spring steel, the arcuate retainer is resilient and holds the head in place through the coaction of the ears and lips and the respective uprights, so that frame 18 may be shipped with locks 20 and 22 in position, as shown in FIG. 4 , without the locks becoming separated from the frame.

With the locks in a retracted or shipping position, as shown in FIG. 4 , the frame is placed in aperture 14 of the ceiling. The frame is moved upward into the aperture so that legs 72 engage the lower surface of ceiling 16 . Continued movement of the frame into the ceiling aperture forces the legs to pivot toward the crown. As the legs approach the annular crown, the heads disengage the upright and the arcuate retainers move outward for the heads to pivot into engagement with the upper surface of the ceiling, as shown in FIGS. 1 , 2 and 7 . The outwardly extending curls allow the heads to slide along the ceiling. As the pads of respective heads 78 of the arcuate retainers engage the ceiling, latch arms 80 slide through the respective locking apertures 90 until latch hooks 82 move into place receiving the respective columnar uprights. Thus, the latches secure the locks in position to hold the frame in the ceiling aperture. The annular base ring engages the lower surface of the ceiling while the heads of locks 20 and 22 resiliently engage the upper surface of the ceiling to hold the frame in place.

Once the frame is in place, lamp 34 is put into position and the baffle and trim ring are locked into position by inserting torsion springs 64 into their respective receptacles 54 to hold the trim ring up against the ceiling.

In the event that it is necessary to remove the frame from aperture 14 , the frame may be readily removed by first removing the trim ring and baffle and then removing lamp 34 . As shown in FIGS. 2 and 3 , a conventional screwdriver blade 108 is inserted through the opening in the annulus to engage the latch head. The screwdriver is used to raise the latch to disengage the respective columnar upright. Downward movement of the frame causes the arcuate retainer to flatten until the legs 72 are out of the aperture. Further downward movement of the frame forces the arcuate retainer to slide through the locking aperture 90 and pivot legs 72 outward. Once the legs pass the ceiling, the locks assume the unlocked position shown in FIGS. 4 and 5 . The frame then may be quickly and easily withdrawn from the ceiling aperture.

Although a specific embodiment of the herein disclosed invention has been shown and described in detail above, it is readily apparent that those skilled in the art may make various modifications and revisions to the subject invention without departing from the spirit and scope thereof. It is to be expressly understood that the instant invention is limited only by the appended claims.

Claims

1. In a recessed electric lighting fixture adapted for installation in a mounting aperture in an interior structural surface including, a frame having a thickness, said frame including a retainer adapted for connection to a side of the interior structural surface, said frame having a holding aperture extending through the thickness, a locking aperture extending through the thickness in said frame and being spaced from the holding aperture, the improvement being a resilient unitary lock mounted in the holding aperture and movably mounted in the locking aperture, said lock having an elongated body, a head formed integral with the body and being connectable to a second side of the structural surface opposite to the first-mentioned surface, said head having a curl including a lip extending outwardly from said body, and said lock having a latch releasably engaging the frame to hold the lock in one position in connection to said second side for holding the frame in the mounting aperture.

2. In a recessed electric lighting fixture adapted for installation in a mounting aperture in an interior structural surface as defined in claim 1, including an ear formed integral with the body adjacent to the head, said ear being spaced from the lip of the curl a distance substantially equal to the thickness of an adjacent portion of the frame.

3. In a recessed electric lighting fixture adapted for installation in a mounting aperture in an interior structural surface as defined in claim 1, wherein said head includes a pad engageable with the second side of the interior structural surface.

4. In a recessed electric lighting fixture adapted for installation in a mounting aperture in an interior structural surface as defined in claim 1, wherein said body has a pair of substantially parallel edges, and an ear formed integral with one edge of the body and being positioned adjacent to the head.

5. In a recessed electric lighting fixture adapted for installation in a mounting aperture in an interior structural surface as defined in claim 1, wherein said body has a pair of substantially parallel edges, an ear formed integral with each edge of the body, each ear being spaced from the lip of the curl a distance substantially equal to the thickness of an adjacent portion of the frame.

6. In a recessed electric lighting fixture adapted for installation in a mounting aperture in an interior structural surface as defined in claim 1, including a flat portion between the body and the curl.

7. In a recessed electric lighting fixture adapted for installation in a mounting aperture in an interior structural surface as defined in claim 1, wherein said body has a pair of substantially parallel edges, an ear formed integral with one edge of the body, said ear having a sloped face engageable with the frame, said sloped face being spaced from the lip of the curl a distance substantially equal to the thickness of an adjacent portion of the frame.

8. In a recessed electric lighting fixture adapted for installation in a mounting aperture in an interior structural surface as defined in claim 1, wherein said body has a pair of substantially parallel edges, an upstanding ear formed integral with one edge of the body, said ear having a sloped face engageable with the frame, said sloped face being spaced from the lip of the curl a distance substantially equal to the thickness of an adjacent portion of the frame, and a pad formed integral with the curl and being engageable with the second side of the interior structural surface.

9. In a recessed electric lighting fixture adapted for installation in a mounting aperture in an interior structural surface as defined in claim 1, wherein said body has a pair of substantially parallel edges, a upstanding ear formed integral with each edge of the body, each ear being spaced from the lip of the curl a distance substantially equal to the thickness of an adjacent portion of the frame, a pad formed integral with the curl and being engageable with the second side of the interior structural surface, and a flat portion between the body and the curl.

10. In a recessed electric lighting fixture adapted for installation in a mounting aperture in an interior structural surface including, a lighting fixture frame, said frame including a retainer adapted for connection to a side of the interior structural surface to restrict movement of the frame relative to the structural surface in one direction, said frame having a holding aperture, a locking aperture in said frame spaced from the holding aperture, the improvement comprising a lock mounted in the holding aperture and releasably lockable to the frame in the locking aperture, said lock being formed from a single resilient flat member, said lock including a post having a pillar, said pillar having a latch head opening, an offset formed integral with one end of the pillar, said offset movably mounted in the holding aperture, a leg formed integral with the offset and being engagable with the structural surface, and an arcuate retainer formed integral with the pillar, said arcuate retainer having a curved longitudinal resilient body having one end formed integral with an end of the pillar opposite the offset, said longitudinal body having a pair of parallel elongated edges, a head formed integral with an end of the longitudinal body opposite the end formed integral with the pillar, said head being engagable with a second side of the interior structural surface opposite to the first-mentioned side to hold the frame in the mounting aperture in interior structural surface, said head having a curl including a lip extending outwardly from said body, a latch formed integral with the longitudinal body, said latch having a cantilever resilient latch arm having one end formed integral with the longitudinal body, and a latch hook formed integral with the free end of the latch arm and being receptive of a portion of the frame in the locking aperture to hold the head against the interior structural surface, whereby pivoting of the pillar causes the arcuate retainer to extend outward from the frame for engagement of the head with the interior surface and the latch hook resiliently engages the frame at the locking aperture to lock the arcuate retainer into position.

11. In a recessed electric lighting fixture adapted for installation in a mounting aperture in an interior structural surface as defined in claim 10, including, an ear formed integral with one edge of the body, said ear being spaced from the lip of the curl a distance substantially equal to the thickness of an adjacent portion of the frame.

12. In a recessed electric lighting fixture adapted for installation in a mounting aperture in an interior structural surface as defined in claim 10, including, an ear formed integral with each elongated edge of the body, and each ear having a sloped face engageable with the frame, said sloped face being spaced from the lip of the curl a distance substantially equal to the thickness of an adjacent portion of the frame.

13. In a recessed electric lighting fixture adapted for installation in a mounting aperture in an interior structural surface as defined in claim 10, an upstanding ear formed integral with each elongated edge of the body, each ear having a sloped face engageable with the frame, each sloped face being spaced from the lip of the curl a distance substantially equal to the thickness of an adjacent portion of the frame, a pad formed integral with the curl and being engageable with the second side of the interior structural surface, and a flat portion between the body and the curl.