JP2708572B2 - lighting equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a ceiling-mounted lighting device such as a downlight.

(Prior Art) As a conventional downlight, a socket, a terminal block, and the like are attached to a main body, and a plurality of metal rod-shaped chassis having a U-shaped cross section or one cylindrical chassis are mounted on an outer portion of the main body. There is a structure in which a metal lower frame is attached to a lower portion of the chassis, and a reflector for surrounding the lamp is disposed between the main body, the chassis, and the lower frame.

However, in such a structure, since the metal chassis and the metal lower frame are fixed by screws or rivets, the assembly is troublesome and requires a lot of man-hours. In particular, at least two screws and rivets are generally used. There are problems that the number of parts is large because four are used.

Further, for example, as described in Japanese Utility Model Application Laid-Open No. 49-115983, there is a structure in which a mounting bracket fixed to a lower frame is elastically engaged with a chassis for mounting.

However, in such a structure, after all, the mounting bracket must be fixed to the lower frame with screws or rivets, and the mounting bracket is only elastically engaged with the chassis. There is a problem that the engagement is easily released.

(Problems to be Solved by the Invention) As described above, in the conventional downlight, the chassis and the lower frame, or the mounting bracket and the lower frame are fixed with screws or rivets, respectively, so that assembly is troublesome and man-hour is reduced. However, there is a problem that many fixing parts such as screws and rivets are required.

Further, when the mounting bracket is used, there is a problem that the mounting bracket is easily disengaged because the mounting bracket is only elastically engaged with the chassis.

The present invention has been made in order to solve such a problem, and in a ceiling-mounted lighting fixture, fixing parts such as screws and rivets are not required for fixing a chassis and a lower frame, thereby facilitating assembly. And to maintain the fixed state reliably.

(Means for Solving the Problems) A lighting fixture of the present invention is a ceiling provided with a main body having a socket at a lower portion, a chassis attached to an outer portion of the main body, and a lower frame provided at a lower portion of the chassis. In the recessed lighting device, an engagement groove provided at the lower end of the chassis and engaged with the lower frame, a locking hole formed near the lower end of the chassis, and provided in the lower frame. A mounting portion to be engaged with the engaging groove of the chassis; and an integral portion formed with the mounting portion. The mounting portion engages with the locking hole of the chassis while being engaged with the engaging groove of the chassis. And a locking claw.

(Operation) In the lighting fixture of the present invention, the lower frame is fixed to the lower portion of the chassis by engaging the locking claw formed integrally with the mounting portion of the lower frame with the locking hole of the chassis. At this time, only when the mounting portion of the lower frame is engaged with the engagement groove of the chassis, the engagement of the locking claw with the locking hole of the chassis is allowed. As a result, the engagement between the locking hole and the locking claw is reliably maintained.

(Embodiment) An embodiment of the lighting fixture of the present invention will be described with reference to FIG. 1 and FIG.

This embodiment is a downlight used by being buried in a ceiling surface.

In the figure, reference numeral 1 denotes a main body case as a plastic main body. This main body case 1 has a box-like shape in which side surfaces 3 and 4 are integrally provided on a lower surface of a peripheral portion of a rectangular top plate portion 2 and is opened. At the outside of the left and right short sides of the top plate 2, mounting pieces 5 are integrally formed to protrude. A pair of support pieces 6 as a pair of support portions are vertically projected on the outer surface in parallel at a predetermined interval, and a pair of locking claws 7 are formed on each of the left and right mounting pieces 5.

On the left side of the upper surface of the top plate 2, a ridge 9 is arranged and projected in a rectangular shape, and a terminal block 10 is positioned inside the ridge 9. An L-shaped holder 12 is integrally formed on the right side of the upper surface of the top plate 2 with a screw 11 from below, and an electric wire (not shown) is held between the holder 12 and the top plate 2. The electric wires are connected to terminals (not shown) inside the terminal block 10, and the electric wires (not shown) connected to the terminals of the terminal block 10 are inserted into the main body case 1 through through holes 14 formed in the top plate 2. It is introduced and connected to a printed circuit board 20 provided with a lighting circuit described later.

Although not shown, the terminal block 10 can electrically connect the core of the electric wire with one touch by inserting the core exposed at the end of the electric wire into a hole provided on the right side thereof. As well as being able to mechanically hold the core of this electric wire, when removing the electric wire, it is possible to pull out the core of the electric wire by pressing the push button provided on the upper part. I can do it.

Further, a pair of locking claws 19 are provided on the front and rear side plate portions 4 of the main body case 1 toward the inner upper side, respectively, and the printed circuit board 20 housed from the lower part of the main body case 1 is provided with the plurality of locking claws. It is supported on the distal end of the body 19 and is held in the main body case 1.

A socket 21 is soldered to the printed circuit board 20 together with components constituting a lighting circuit at the center of the lower surface, and the socket 21 is mechanically held on the printed circuit board 20 by a plurality of screws 22. .

Numeral 25 denotes a plastic cover which also serves as an insulation and is mounted in the opening on the lower surface of the main body case 1. Locking claws 26 protrude outside the left and right short sides of the cover 25. 26 is a locking hole formed in the left and right side plate portions 3 of the main body case 1
By engaging with 27, it is held in the opening on the lower surface of main body case 1.

A through hole 28 is formed at the center of the cover 25 so that the lower end of the socket 21 protrudes. Projections 29 project downward from both left and right ends of the through hole 28. On the inner side of the lower end of the piece 29, a locking claw 30 for a reflecting mirror 54 to be described later is projected.

The through-hole 28 of the cover 25 is made as small as possible with respect to the outer shape of the socket 21 to prevent hot air from entering the main body case 1 and to provide heat to the lighting circuit provided on the printed circuit board 20. Has been prevented from coming out.

Reference numeral 33 denotes a chassis made of a pair of left and right metal plates.
35 is bent in a U-shape in cross section, is long in the vertical direction, and has a mounting piece extending from the upper end of the substrate portion 34 to the same inside as the reinforcing plate portion 35.
36 are bent, and each of the mounting pieces 36 has a pair of locking holes.
37 are formed.

Then, the reinforcing plate portions 35 of the pair of left and right chassis 33 are engaged with the outside of the left and right support pieces 6 of the main body case 1, and the mounting pieces 36 of the right and left chassis 33 are connected to the right and left mounting pieces 5 of the main body case 1. In this state, the locking claw 7 of the mounting piece 5 of the main body case 1 is engaged with the locking hole 37 of the mounting piece 36 of the chassis 33, and in this state, ,
The upper end of the chassis 33 is attached to each of the right and left sides of the main body case 1.

A locking hole 41 is formed near the lower end of the board portion 34 of the pair of left and right chassis 33, and the board portion 34
The support piece 42 is bent outward from the lower end of the support plate 35, and an engagement groove 43 is formed at the lower end of the reinforcing plate 35 on both sides.

A guide groove 44 is formed in the board portion 34 of the pair of left and right chassis 33 in the vertical direction, and a locking tool (not shown) is provided for the guide groove 44 from the outside of the chassis 33 so as to be capable of adjusting the vertical position. A ceiling plate is sandwiched between the locking member, a support piece 42 at the lower end of the chassis 33, and a flange portion 48 of a decorative frame 46 described later.

46 is an annular decorative frame as a plastic lower frame,
This decorative frame 46 has a flange portion around the lower end of the short cylindrical portion 47.
48, and an engagement concave portion 49 is formed on the inner surface of the lower surface of the flange portion 48. The left and right sides of the short cylindrical portion 47 are U-shaped outside as mounting portions 50 for the left and right chassis 33. A locking claw 51 is formed on the outer side of the left and right mounting portions 50, and a circular opening 52 inside the decorative frame 46 has a lower opening 56 and a lower end opening 56 of a reflecting mirror 54 described later. It functions as a light transmitting part for the fluorescent lamp 61.

The left and right mounting portions 50 of the decorative frame 46 are engaged with the engagement grooves 43 at the lower ends of the left and right chassis 33, and in this state, the locking claws 51 of the mounting portion 50 are engaged with the left and right chassis 33. Stop hole 41
, And the support pieces 42 of the left and right chassis 33 abut against the flange portions 48 of the decorative frame 46, whereby the decorative frames 46 are attached to the lower ends of the left and right chassis 33.

At this time, since the lower end portions 35a of the reinforcing plate portions 35 on both sides of the chassis 33 are engaged with the inside of the mounting portion 50 of the decorative frame 46 by forming the engaging groove 43, the mounting portion of the decorative frame 46 is Since the engagement between the locking claw 51 of the mounting member 50 and the locking hole 41 of the chassis 33 is maintained, the mounting is ensured, and the inner dimension between the side portions 50a on both sides of the mounting portion 50 and both sides of the chassis 33 are The outer dimensions of the reinforcing plate portion 35 are made substantially equal, and the engagement groove of the chassis 33 is formed.
Since the width of 43 and the thickness of the mounting portion 50 are substantially equal, the chassis 33 does not rattle.

Numeral 54 denotes a reflecting mirror, which has a bell shape and surrounds a fluorescent lamp 61 to be described later, reflects the light of the fluorescent lamp 61 and guides the light downward. Engagement holes 55 are formed on both sides of the surrounding upper end, and the engagement holes 55 on both sides are engaged with the left and right engagement claws 30 of the cover 25, thereby being attached to the lower portion of the cover 25. In this state, the flange portion 57 formed on the outer periphery of the lower end opening portion 56 of the reflecting mirror 54 is engaged with the engaging concave portion 49 of the flange portion 48 of the decorative frame 46.
Is engaged.

A through-hole 58 is formed in the upper end surface of the reflecting mirror 54 so that the lower end of the socket 21 is fitted therein. Is prevented from entering the main body case 1 and the lighting circuit provided on the printed circuit board 20 is prevented from being affected by heat.

Reference numeral 61 denotes a U-shaped fluorescent lamp as a lamp. The fluorescent lamp 61 has a base 62 portion detachably connected to the socket 21 and is mechanically held by the socket 21 and supplied with power. It has become.

Then, when assembling the downlight according to this embodiment, first, the terminal block 10 is attached to the main body case 1 with the screw 11, and then the printed circuit board 20 to which the lighting circuit and the socket 21 are attached is connected to the terminal block 10. Is connected through a through hole 14 of the top plate 2 of the main body case 1 with an electric wire or the like (not shown),
The printed circuit board 20 is housed in the main body case 1, the printed circuit board 20 is held in the main body case 1 by the plurality of locking claws 19 of the main body case 1, and the cover 25 is attached to the lower opening of the main body case 1.

Next, the mounting pieces 36 at the upper end of the chassis 33 are inserted into the gaps between the left and right mounting pieces 5 and the support pieces 6 of the main body case 1 respectively. The left and right chassis 33 are attached to the main body case 1 by engaging the locking claws 7 of the attachment pieces 5, and the left and right attachment portions 50 of the decorative frame 46 are fitted into the engagement grooves 43 at the lower end portions of the left and right chassis 33. By engaging the locking claws 51 of the mounting portion 50 with the locking holes 41 of the chassis 33, the decorative frame 46 can be mounted on the left and right chassis 33.

In mounting the downlight of this embodiment,
Holder 12 on top of body case 1 and top plate 2 of body case 1
After the electric wires are held between them and connected to the terminal block 10, the main body case 1 is inserted into an opening formed in a ceiling plate (not shown).
To the lower end of the chassis 33, and insert the decorative frame
The flange 48 of the 46 abuts against the lower surface of the ceiling plate, and the chassis 33
Is moved downward along the chassis 33 so that the locking tool and the support piece 42 at the lower end of the chassis 33 are moved.
And, the ceiling plate is sandwiched between the decorative frame 46 and the flange portion 48.

Next, the locking holes 55 on both sides of the upper end of the reflecting mirror 54 are covered with the cover 25.
Engage with the lower left and right locking claws 30 and attach the reflecting mirror 54 to the cover 25.
Is attached, and the base 62 of the fluorescent lamp 61 is connected to the socket 21, so that the attachment is completed and the device can be used.

Although this embodiment is an example in which the body case 1 and the decorative frame 46 are connected by a pair of U-shaped rod-shaped chassis 33, the present invention is not limited to this. The present invention can also be applied to a configuration in which the main body case 1 and the decorative frame 46 are connected by one surrounding cylindrical chassis.

(Effect of the Invention) According to the lighting fixture of the present invention, in the ceiling-mounted lighting fixture, by engaging the locking claw integrally formed with the mounting portion of the lower frame with the locking hole of the chassis, Since the lower frame can be fixed to the lower part of the chassis, the number of man-hours for assembling is small, and fixing parts such as screws and rivets can be eliminated, and the lower frame can be easily fixed to the chassis. The locking claw can be engaged with the locking hole of the chassis only when the mounting portion of the lower frame is engaged with the groove, so that the locking hole and the locking claw can be engaged with the chassis and the lower frame firmly assembled. The engaged state can be reliably maintained.

[Brief description of the drawings]

FIG. 1 is a front view, partly in section, of one embodiment of a lighting fixture of the present invention, and FIG. 2 is an exploded perspective view of a main part thereof. 1 ... body case as body, 21 ... socket, 33 ...
... Chassis, 41, locking hole, 43, engaging groove, 46, decorative frame as lower frame, 50, mounting portion, 51, locking claw.

Claims (1)

(57) [Claims] 1. A ceiling-mounted luminaire comprising a main body having a socket provided at a lower portion, a chassis attached to an outer portion of the main body, and a lower frame provided at a lower portion of the chassis. An engagement groove provided at a lower end portion and engaged with the lower frame; a locking hole formed near the lower end portion of the chassis; and an engagement groove provided at the lower frame and engaged with the engagement groove of the chassis. A mounting portion formed integrally with the mounting portion, and a locking claw that engages with a locking hole of the chassis when the mounting portion is engaged with the engagement groove of the chassis. Lighting equipment featuring.