JPH02239508A - Downlight - Google Patents

Abstract

PURPOSE:To prevent an attachment piece from rotating so as to make assembling work easier by making the attachment piece slide along the engagement recessed portion of a top plate, and guiding the engagement piece of the attachment piece through the locking hole of the engagement recessed portion. CONSTITUTION:In order to threadedly engage the attachment piece 26 of a chassis 25 with a top plate 1 during assembling work, the attachment piece 26 is engaged with the engagement recessed portion 20 of the top plate 1 and made to slide inwardly, whereby the engagement piece 28 of the attachment piece 26 can be made to pass through the locking hole 22 of the engagement recessed portion 20. Under this condition the tip edge portion 27 and both side edge portions 35 of the attachment piece 26 are made to abut in the inner edge portion 21 and both side end portions 34 of the engagement recessed portion 20, respectively, so that the attachment piece 26 of the chassis 25 is positioned to the engagement recessed portion 20 of the top plate 1. In fastening a screw 29, the attachment piece 26 of the chassis 2 is thereby prevented from rotating with respect to the top plate 1, and assembling work is made excessively easier.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a downlight 1- of a lighting fixture that is embedded in a ceiling or the like.

(Prior art) A downlight includes a top plate on which a lamp is attached via a socket at the bottom, a plurality of chassis attached to the outside of the top plate and extending downward, and a top plate attached to the bottom of the plurality of chassis and arranged above. A device is known that includes a lower frame that has a light-transmitting portion for the lamp, and a reflecting mirror that surrounds the lamp and is located between the top plate, the chassis, and the lower frame.

In this type of downlight, a horizontal mounting piece is bent inward from the top end of the chassis, and this mounting piece is screwed onto the bottom surface of the top plate with screws such as tutting screws, thereby attaching the top plate and the top plate. ? -I am assembling the shi.

However, if the screws are simply screwed in, the mounting piece rotates relative to the top plate around the screw when tightening the screw, making it difficult for both people to position each other and making assembly work difficult.
Even if two or more screws are used, the two or more screws must be screwed together to some extent to prevent the mounting piece from rotating before the screws can be tightened, and the screw tightening process must be completed 4 times. Assembly work efficiency is poor because it has to be done in more than one time.

For this reason, there is a method in which the mounting piece of the chassis to which the screws are screwed and the top plate are provided with small uneven parts that engage with each other, and the engagement of these uneven parts prevents the rotation of the mounting piece, but in the case of this method, When tightening the screws, unless the top plate is pressed against the mounting piece to forcibly hold the uneven portions together, it will not be possible to prevent the mounting piece from rotating, and assembly work efficiency will not be improved.

(Problems to be Solved by the Invention) As mentioned above, in the conventional case, when assembling a downlight, when screwing the mounting piece of the chassis onto the top plate,
There was a problem in that the mounting piece easily rotated with respect to the top plate, resulting in poor assembly workability.

The present invention has been made in view of these points, and when assembling a downlight, when screwing the mounting piece of the chassis onto the top plate, the mounting piece is positioned with respect to the top plate, and the mounting piece is fixed. The purpose is to prevent the rotation of the

(Structure of the Invention) (Means for Solving Rall!) The present invention includes a top plate to which a lamp is attached via a socket at the bottom thereof, a plurality of chassis attached to the outer side of the top plate and extending downward, A downlight including a lower frame attached to the lower part of the plurality of chassis and having a light-transmitting part for the lamps, and a reflector located on the top plate, the chassis, and the lower part and surrounding the lamps, A horizontal mounting piece is bent inward from the upper end of the chassis, and an engaging piece is provided protruding from the tip edge of the mounting piece, and an engagement piece is provided on the lower surface of the outer edge of the top plate to engage the mounting piece. A sliding engagement recess is formed, and a locking hole through which the engagement piece is inserted is bored at the inner end I1 of the engagement recess, the retention piece is inserted into the locking hole, and the mounting piece is inserted into the locking hole. The mounting piece is screwed into the engagement recess with the leading edge and both side edges of the engagement recess in contact with the inner end and both side ends of the engagement recess.

When screwing the mounting piece of the chassis onto the top plate, the downlight of the present invention slides the mounting piece along the engagement recess of the top plate and engages the engagement piece of the mounting piece. The chassis mounting piece is positioned on the top plate by passing it through the locking hole of the recess and abutting the leading edge and both side edges of the holding piece against the inner edge and both side ends of the engagement recess. be.

(Example) An example of this downlight will be described with reference to the drawings.

In Fig. 1, reference numeral 1 denotes a circular top plate made of a metal plate. This top plate 1 is arranged horizontally, and is installed by cutting the center part downward into a trapezoid shape and bulging out. A base part 2 is formed at Ikkyu, a socket 3 is attached to the lower side of this mounting base part 2, a base 5 portion of a fluorescent lamp 4 as a U-shaped lamp is removably connected to this socket 3, and a socket 3 is attached to the socket 3. 3 mechanically holds the fluorescent lamp 4 and supplies power to the fluorescent lamp 4.

A ballast 8, an electronic starter 9, a terminal block 10, etc. necessary for lighting the fluorescent lamp 4 are attached to the lower surface of the top plate 1 around the mounting base 2 with screws 11 such as tubbing screws. .

In addition, when attaching the socket 3 to the mounting base 2, an inverted U-shaped metal plate spring is bent between the mounting base 2 and the socket 3.
The intermediate piece of the letter-shaped mounting spring 14 is set in a supporting position, and the dog-shaped retaining portions 15 formed at the tips of both side pieces of the mounting spring 14 removably hold the reflecting mirror 16. There is. That is, the reflection l116 has a fishing line shape, surrounds the fluorescent lamp 4, reflects the light of the fluorescent lamp 4, and guides it downward, and both sides of the upper end surrounding the base 5 of the fluorescent lamp 4 Engagement holes 11 for the doglegged engagement portions 15 on both sides of the upper mounting spring 14 are formed in the upper mounting spring 14, and the engagement portions 15 on both sides of the mounting spring 14 are elastically inserted into the engagement holes 17 on both sides. By engaging, the reflector 11l16 is removably retained.

Furthermore, as shown in FIG. 2, engagement recesses 20 having a predetermined width and a predetermined depth are formed on the lower surface of the outer edges on both sides of the top plate 1 on both sides in a direction different from that of the mounting spring 14; A slit-shaped locking hole 22 of a predetermined length is bored in the center of the inner end 21 of the engaging recess 20, and the locking hole 22 connects the engaging recess 20 of the lower part of the top plate 1 with the top plate. The upper surface of the plate 1 is horizontally connected.

In FIG. 1, reference numeral 25 denotes a U-shaped chassis made of a metal plate, and a pair of chassis 25 on both sides of the chassis are made of metal plates.
5 are arranged vertically and in parallel with each other with the concave sides of the U-shaped cross sections facing each other, and as shown in FIG. Attachment pieces 26 with approximately the same width as the width are bent inward at right angles, that is, horizontally, and a slit-shaped locking hole in the top plate 1 is provided in the center of the tip edge 27 of each attachment piece 2G. A retaining piece 28 of approximately the same width as the length of 22 is provided protrudingly, and with this engaging piece 28 passed through the locking hole 22 of the top plate 1, the mounting piece 26 engages with the top plate 1! The chassis 25 are screwed into the jl portion 20 with screws 29 such as tapping screws, and thereby a pair of chassis 25 on both sides are vertically attached to the outer lower part of the top plate 1.

Note that the through hole 32 of the engagement recess 20 of the top plate 1 and the screw hole 33 of the mounting piece 26 of the chassis 25 for the screw 29 are such that the tip edge 27 of the mounting piece 26 is connected to the inner end 21 of the engagement recess 20.
Moreover, since the width of the engagement recess 20 and the width of the mounting piece 26 are almost the same, the mounting piece 26 is aligned with both WI4'la parts 34 of the engagement recess 20. Both side edges 35 are in contact with each other, and since the length of the slit-shaped locking hole 22 of the top plate 1 and the width of the engaging piece 28 of the chassis 25 are almost the same, the engaging piece is attached to both ends 36 of the locking hole 22. The B portions 37 on both sides of 28 are brought into contact with each other.

An annular decorative frame 40 as a lower frame is attached to the lower end of the copper chassis 25 with screws 41, and this decorative frame 40 surrounds the lower end opening of the reflection ii1B. The circular opening 42 of
As the lower end opening of 116 and the transparent part for the fluorescent lamp 4! function.

Further, slits (not shown) are formed in each of the chassis 25 on both sides in the longitudinal direction, that is, in the vertical direction, and the engaging portions 46 of the mounting brackets 45 are engaged with these slits from the outside of the chassis 25. A pressing spring 47 made of a bent metal spring wire is engaged with the engaging portion 46 of the holder, and when the pressing spring 47 is positioned downward as shown in the figure, the pressing spring 47 causes the mounting bracket 4°5 to chassis 25
When the press spring 47 is rotated upward from the illustrated state, the mounting bracket 45 can be moved in the vertical direction along the slit of the chassis 25.

Therefore, in the downlight of this embodiment, the ceiling plate 48
A pair of chassis 25 on both sides are installed from the top plate 1 to the frontage formed in the
Insert the part up to the lower end of the decorative frame 40 into the ceiling board 4B.
of the mounting bracket 4 and operate the pressing spring 47.
5 is brought into contact with the lower surface of the ceiling board 48, and when the mounting bracket 45 is fixed in that position in this state, the ceiling board 48 will be attached to the decorative frame 40.
Since it is held between the upper and lower sides by the mounting fittings 45, it can be used by being buried in the sky.

Then, when assembling, when screwing the mounting piece 26 of the chassis 25 onto the top plate 1, the mounting piece 26 is engaged with the locking recess 2G of the top plate 1, and is inserted along the locking recess 20. When the engagement piece 28 of the attachment piece 26 is slid inward, the engagement piece 28 of the attachment piece 26 can be inserted into the locking hole 22 of the engagement recess 20. When inserted until it stops, the engagement piece 28 of the attachment piece 26 can be inserted into the through hole 32 of the engagement recess 20 and attached. Since the screw holes 33 of the pieces 26 match, the screws 29 can be inserted into the holes 3 as they are.
2 and screwed into the ll attachment hole 33.

In this state, the leading end edge 27 and both bait edges 35 of the mounting piece 26 come into contact with the inner gA end 21 and both side ends 34 of the engagement recess 20, so that the engagement recess 27 of the top plate 1 The mounting piece 26 of the chassis 25 is positioned at , and therefore, when the screws 29 are tightened, the mounting piece 26 of the chassis 25 does not rotate relative to the top plate 1, making assembly work extremely easy. becomes.

In addition, in this embodiment, the engagement recess 20 of the top plate 1 is
Although the mounting piece 26 of the chassis 25 is fixed to the lower surface of the top plate 1, the engagement recess 2 of the top plate 1 is not limited thereto.
0 is formed on the upper surface of the top root 1, and the mounting piece 2G of the chassis 25 is
may be fixed to the upper surface of the top plate 1. Also, an annular decorative frame 40 is used as the ten frame, and its opening 42 is made into a light-transmitting part, but the present invention is not limited to this. The light-transmitting portion may be a light-transmitting plate made of glass or plastic, and the lamp is not limited to the fluorescent lamp 4, but may be one using a white PIA light bulb.

(Effects of the Invention) As described above, according to the present invention, when assembling a downlight, there is no need for a seal on the top plate. - When screwing on the mounting plate, engage the coupling piece in the engagement recess on the top plate, and slide it inward along the engagement recess to engage the engagement piece on the mounting piece. It can be inserted into the locking hole of the mating recess, and in this state, the tip edge and both side line parts of the mounting piece are brought into contact with the inner end and both side ends of the engaging recess, and the top of the engagement recess is inserted. Since the mounting piece of the chassis is positioned at the top plate and screwed into the engagement recess of the top plate, the mounting piece of the chassis will not rotate relative to the top plate when tightening the screws. This makes assembly work extremely easy.

[Brief explanation of drawings]

FIG. 1 shows the dow of the present invention. FIG. 2 is a front view of one embodiment of the light, taken in section at the - section, and FIG. 2 is an exploded view of the main parts thereof. 1. Top plate, 3. Socket, 4. Fluorescent lamp as a lamp, 16. Reflector, 20. Engagement recess, 21.
・Inner end, 22...Latching hole, 25...Chassis, 26
...Mounting piece, 21...Tip edge, 28...Engagement piece, 34
・Both Il ends, 35...Both! li edge, 40... Decorative frame as a lower frame, 42... Opening as a light projecting part.

Claims (1)

[Claims] (1) A top plate to which a lamp is attached via a socket at the bottom, a plurality of chassis attached to the outside of the top plate and extending downward, and a transparent part attached to the bottom of the plurality of chassis for the lamps. and a reflector positioned between the top plate, the chassis, and the bottom frame to surround the lamp; An engagement piece is provided protruding from the tip edge of the attachment piece, an engagement recess for the attachment piece is formed on the lower surface of the outer edge of the top plate, and the engagement piece is provided at the inner end of the engagement recess. A locking hole is drilled through which the locking hole is inserted, the engaging piece is inserted into the locking hole, and the leading edge and both side edges of the mounting piece are brought into contact with the inner end and both side ends of the engaging recess. A downlight characterized in that the mounting piece is screwed into the engagement recess while the mounting piece is in contact with the engagement recess.