JPH02210704A - Lighting apparatus - Google Patents

Abstract

PURPOSE:To reduce oppressive sensation on a user and also temperature increase of a lighting unit by arranging a lighting fixture such that chassis at its upper face overlaps a base at its edge portion and a remaining wide chassis portion is protruded outside of the base and providing a chassis portion apart from the edge portion of the base with the lighting unit. CONSTITUTION:A lighting fixture 26 is arranged in such a way that a portion of its chassis 27 overlaps an edge portion of a base 23 and a remaining chassis portion wider than the portion is protruded outside of the base 23, each being supported by the edge portion of the base 23. A lighting unit 31 is situated so as to thermally touch the inner face of the chassis 27 so that the longitudinal direction is set along the direction orthogonal to a line B-B which is a bisector of the edge portion of the base 23 and its center is matched with the center of the lighting fixture 26. Therefore, the base 23 and a fitting plate are made small. Further, heat produced by the lighting unit 31 is easily transferred to a portion of the chassis 27 protruded outside of the base 23 and is transmitted quickly. Accordingly, oppressive sensation on a user is lessened and temperature increase of the lighting unit 31 is restricted.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a multi-light lighting fixture that is directly mounted on the ceiling and is equipped with a plurality of lighting fixtures and is mounted on a ceiling surface.

[Conventional technology]

As shown in Figures 6 to 8, conventional multi-light lighting fixtures that are directly mounted on the ceiling have a board 1, a rectangular base 2 that covers this board 1, and this base 2
It is formed from a plurality of lamps 3 supported on the lower surface of the lamp. Each lamp 3 is arranged inside the periphery of the base 2, and these lamps 3 are supported by a plurality of screws 4. 6 to 8, reference numeral 5 indicates a nut that is screwed onto a downward screw 6 protruding from the plate 1;
Base 2 is connected to. This nut 5 is screwed onto the screw 6 between adjacent lamps 3 and is exposed on the outside of the lamp. As shown in Fig. 7.8, each lamp 3 has an annular lamp 9 attached to the inner surface of the chassis 7 via a lamp holder 8, and a metal fitting 10 and an inverter-type lighting unit 11 are attached to the cover. A translucent cover 12 covering the annular lamp 9 is supported on the metal fitting 11 via decorative screws 13. The cover is attached using a metal fitting at the center of the chassis 7, and due to this relationship, the lighting unit 11 is placed inside the lamp 9, avoiding the metal fitting 10.

[Problem to be solved by the invention]

In the conventional configuration, since each lamp 3 is arranged inside the periphery of the base 2 without protruding from the periphery, the base 2 and the plate 1 needed to be made large for mounting.

Therefore, not only does the cost of materials increase, but also the base 2 is easily visible, and when it is directly attached to the ceiling, it tends to give a feeling of pressure to the user as a shaped lighting fixture. On the other hand, during lighting, the lighting unit 11 generates heat, and the heat is transferred to the chassis 7, from which it is emitted to the outside. However, with the supporting structure of the lamp 3 on the base 2 as described above, the entire upper surface of the chassis 7 of the lamp 3 is overlapped with the lower surface of the base 2, so that the heat radiation from the chassis 7 is dissipated from the base 2. Therefore, there was a problem that the heat dissipation of the lighting unit 11 was not good.

SUMMARY OF THE INVENTION An object of the present invention is to provide an inexpensive lighting fixture that can reduce the feeling of pressure on the user and also reduce the temperature rise of the lighting unit included in each lighting fixture.

[Means to solve the problem]

In order to achieve the above object, in the lighting equipment of the present invention, the mounting fixed to the ceiling surface is a board, this mounting is connected to the board, and the above mounting is a rectangular base that covers the board, and a chassis. An annular lamp and a lighting unit located inside the lamp are attached to the inner surface, and a part of the upper surface of the chassis overlaps the corner of the base, and the remaining chassis part, which is wider than this part, is placed outside the base. and a lamp that protrudes and is supported by each corner of the base, and the lighting unit is arranged in a direction perpendicular to a line dividing the length of the unit into two equal parts of the corner of the base. The center of the lighting unit is aligned with the center of the lamp.

[Effect]

In the lighting fixture of the present invention, each lamp is supported at each corner of a rectangular base, and a part of the upper surface of each lamp is overlapped with the corner of the base, and the remaining chassis is wider than this part. The part is configured to protrude outside the base.

Therefore, the shape of the plate for the base and the mounting covered by the base can be reduced. In addition, the lighting unit that is attached closely to the inner surface of the chassis is arranged so that the length direction of this unit is perpendicular to a line segment that bisects the corner of the base, and the center of the lighting unit is set above the Since it is arranged in alignment with the center of the lamp, the lighting unit can be provided in thermally conductive contact with the chassis portion that is away from the corner of the base. Therefore, the heat generated by the lighting unit can be easily transferred to the part of the chassis where the base does not overlap, and can be quickly released from there into the atmosphere, thereby suppressing the temperature rise of the lighting unit. can.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 5.

Reference numeral 21 in FIGS. 4 and 5 indicates a mounting plate made of sheet metal or the like, which is fixed to the ceiling surface A via a plurality of screws 22 (only one is shown). For mounting, the plate 21 is covered with a base 23 made of sheet metal and formed into a rectangular shape, for example.

As shown in FIG. 5, the base 23 is mounted by protruding downward from several locations on the plate 21 (only one location is shown), and the tip of the base 23 is attached to a connecting screw 24 inserted through the base 23 by a cap nut 25.
The mounting is connected to the plate 21 by screwing them together. Moreover, in the case of this embodiment, the above-mentioned connection position is on the line segment B-B that bisects the corner of the base 23 (see FIG. 1) and inside the lamp 26, which will be described later. It is located close to the tip of the corner. In FIGS. 4-5, 23a is a decorative frame attached to the periphery of the base 23, and 23b is a downward convex portion which receives the force of tightening the cap nut 25.

A plurality of lamps 26 are provided on the lower surface of the base 23 as described later.
is supported. Each lamp 26 includes a chassis 27, a lamp holder 28, an annular lamp 29, a cover mounting fitting 30, a lighting unit 31, a lamp cover 32,
It is formed with decorative screws 33 and the like.

In other words, the chassis 27 is made of sheet metal, and on its inner surface,
An annular lamp 29 is attached via a plurality of lamp holders 28, and a cover fitting 30 and a lighting unit 31 are attached inside the lamp 29, respectively. The lamp cover 32 is made of glass or synthetic resin and has translucency, and can be attached to the annular lamp 29 by screwing a decorative screw 33 that passes through its center into the metal fitting 30. installed over the cover.

A truncated conical protrusion 39 is bent at the center of the chassis 27 of the lamp 26. Each lamp 26 has a part of its chassis 27 overlapped with a corner of the base 23, and the remaining chassis part, which is wider than this part, protrudes outside the base 23 (see FIG. 1, etc.). They are supported by the corners of the base 23, respectively. This support is achieved by screwing a nut 36 onto a screw 35 that passes upward through the convex portion 39 and the tip of the corner of the base 23 as shown in FIGS. 4 and 5, and as shown in FIG. This is accomplished by screwing nuts 38 into a plurality of other screws 37 that are inserted upward through the corners of the chassis 27 and the base 23.

As shown in FIG. 4, a cylindrical spacer 47 is interposed between the chassis 27 and the base 23 at the fixed portion through which the screw 37 is inserted. This spacer 47 is connected to the convex portion 39
It is a little longer than the base 2, which makes the lamp 26 the base 2.
3, the chassis 27 is raised slightly in the direction of the arrow in FIG. 4 using the convex portion 39 as a fulcrum, so that the hanging of the lamp 26 due to its own weight can be offset.

The lighting unit 31 is of an inverter lighting type, for example, and has a rectangular parallelepiped shape.

As shown in FIG. 1, the lighting unit 31 has its length along the direction perpendicular to the line segment B-B that bisects the corner of the base 23, and its center is aligned with the center of the lamp 26. It is disposed in thermally conductive contact with the inner surface of the chassis 27 and is fixed with screws 40 . At this time, the lighting unit 31 overlaps the screw 35 for mounting the lighting device inserted into the center of the chassis 27, but since the screw 35 is housed in the convex portion 39, it will not interfere with the installation of the lighting unit 31. do not have.

A lamp socket 42 is connected to the tip of the output cord 41 pulled out from the lighting unit 31.
2 is connected to an annular lamp 29. Furthermore, as shown in FIG. 1, the input cord 43 pulled out from the lighting unit 31 passes through a through hole 44 provided in the overlapping portion of the base of the chassis 27 and a through hole (not shown) provided in the base 23 to the base 23. 23 and is connected to a switch (not shown) provided in the base 23 and a power supply line. In addition, 45 in FIG. 2.3 is a switch operation string.

Based on the arrangement of the lighting unit 31 on the chassis 27, the cover mounting metal fitting 30 is provided across the lighting unit 31, and is fixed to the chassis 27 with a fixing member 46 such as a rivet. In this installation, the decorative screw 32 is screwed into the center of the lower end of the metal fitting 30.

To install the lighting fixture with the above configuration on the ceiling surface A, first,
For installation on the ceiling surface A, the plate 21 is fixed with screws 22. Next, an assembly is prepared in which the chassis 27, on which the lamp holder 28, the cover attachment fittings 30, and the lighting unit base 31 have been attached in advance, is supported at each corner of the base 23, and predetermined wiring is made. . Note that the screw 35 is attached to the protrusion 3
Since the lighting unit 31 is attached to the chassis 27 with the screw 3' passed through the protrusion 39 and housed in the protrusion 39 in advance, the screw 3'5 will not accidentally fall out from the protrusion 39. Then, pass this screw 35 through the base 23,
The chassis 27 and the base 23 are connected by screwing and tightening a nut 36 thereon. Furthermore, this assembly may be done in advance or may be carried out at the construction site. Then, after pushing up the prepared assembly and making a connection with the power line, the base 23
The mounting is done by fitting on the outside of the plate 21. Next, base 23
For installation through the chassis 27, cap nuts 25 are screwed onto the ends of the connection screws 24 of the plate 21, respectively, to fix the assembly to the ceiling surface A.

Finally, after attaching the annular lamp 29 to the lamp holder 28 and connecting the lamp socket 42 to the lamp holder 29, the lamp cover 32 is fitted to the chassis 27 and the cover is attached to the metal fitting 30 with the decorative screws 33. The above steps complete the installation of the lighting fixtures on the ceiling.

In such work, the connection made by the connection screw 24 and the cap nut 25 is located inside the lamp 26, so that 1. The lamp cover 32 must be removed from the lamp 26 when attaching and detaching the assembly. Therefore, the weight of the lamp cover 32 made of glass or the like is not added to the assembly, and it can be easily installed on the ceiling surface A in a lightweight state, and the tool for operating the cap nut 25 does not hit the lamp cover. There is no risk of damage.

In this lighting fixture, since the cap nut 25 for connecting the base 23 to the mounting plate 21 is located inside the lamp 26, this nut 25 cannot be visually recognized. Therefore, the appearance as a lighting fixture can be improved.

In addition, by locating the connecting portion formed by the connecting screw 24 and the cap nut 25 inside the lamp 26, the position of the connecting portion formed by the connecting screw 24 and the cap nut 25 is placed on the line segment B-B (see Fig. 1) that bisects the corner of the base 23 into two equal parts. Then, the connecting portion can be brought closer to the tip of the corner of the base 23 and removed. That is, as shown by dimension C in FIG. 5, the positions of the connecting portion and the center of gravity of the lamp 26 become closer. Therefore, the corners of the base 23 supporting the lamp 26 can be prevented from sagging, and the appearance of the lamp can be improved. Incidentally, in the case of the conventional example shown in Figures 6 to 8, since a connecting part is provided between the lamps, this connecting part cannot be brought close to the tip of the corner of the base, and therefore the weight of the lamp is reduced. There is a high possibility that the corners of the base will sag.

Moreover, by aligning the center of the lighting unit 31 with the center of the lamp 26, the center of gravity of the lamp 26 can be adjusted to the center of the lamp 26.
6, and the screw 35 and nut 36 connect the chassis 2 on the center line.
7 and the base 23, it is easy to maintain balance when mounting the lamp 26. Therefore, the base 23 of the light fixture 26 does not have to be firmly fixed.
Even if the number of screws is reduced, the lamp 26 can be prevented from hanging down at that point.

In addition, the lighting fixture with the above configuration supports the lamps 26 at each corner of the base 23, and overlaps a part of the upper surface of the chassis 27 of each lamp 26 with the corner of the base 23, and has a wider area than the part. The remaining portion of the shaft is made to protrude outside the base 23. Therefore, the shape of the plate 21 can be reduced by the base 23 and the mounting covered by the base 23. Therefore, the cost of these materials can be reduced, most of the base 23 can be hidden by each lamp 26, and direct ceiling mounting can reduce the feeling of pressure on the user as a shaped lighting fixture.

Furthermore, the lighting unit 31 is attached to the inner surface of the chassis 27.
This is because the length direction of this unit 31 is aligned in a direction perpendicular to the line segment B-B that bisects the corner of the base 23, and the center of the lighting unit 31 is aligned with the center of the lamp 26. , the lighting unit 31 could be provided in thermally conductive contact with the chassis portion that is outside the corner of the base 23.

Therefore, the radiation of heat generated by the lighting unit 31 is less likely to be obstructed by the base 23 overlapping the chassis #-27, and the heat can be easily transferred to the chassis portion protruding from the base 23. From there, it can be quickly released into the atmosphere. Thereby, the thermostat -rl of the lighting unit 31 can be suppressed and its lifespan can be extended.

〔Effect of the invention〕

According to the present invention configured as described above, each lamp is supported at each corner of a rectangular base, and a part of the upper surface of each lamp is overlapped with the corner of the base, and the upper surface of each lamp is overlapped with the corner of the base. Since the remaining wide chassis portion is made to protrude outside the base, the shape of the base and the mounting plate covered by the base can be made smaller, reducing costs and reducing the feeling of pressure on the user. Then, the lighting unit that is attached to the chassis in thermally conductive contact with the chassis is aligned so that the length direction of this unit is perpendicular to the line segment that bisects the corner of the base, and the lighting unit is Since the center is aligned with the center of the lamp, the heat of the lighting unit can be quickly released into the atmosphere through the chassis portion where the base does not overlap, thereby suppressing a rise in temperature of the lighting unit.

[Brief explanation of the drawing]

Figures 1 to 5 show one embodiment of the present invention, Figure 1 is a bottom view showing the structure of the lamp attachment to the base, Figure 2 is a side view of the whole, and Figure 3 is a perspective view of the whole. , Figure 4 is I in Figure 1.
5 is a cross-sectional view taken along the line V-IV in FIG. 1. FIG. 6 to 8 show conventional examples,
6 is an overall perspective view, FIG. 7 is a cross-sectional view taken along line 1--2 in FIG. 8, and FIG. 8 is a bottom view showing the structure of the lamp attachment to the base. 21...Mounting on board, 23...Base, 26...Light fixture, 27...Chassis, 29...Annular lamp, 31
...Lighting unit ◎ Applicant's agent Patent attorney Takehiko Suzue Figure 3 Fu Figure 5

Claims (1)

[Claims] a mounting plate fixed to a ceiling surface; a square base connected to the mounting plate and covering the mounting plate;
An annular lamp and a lighting unit located inside the lamp are attached to the inner surface of the chassis, and a part of the upper surface of the chassis overlaps the corner of the base, and the remaining part of the chassis that is wider than this part overlaps the base. and a lamp that projects outward and is supported by each corner of the base, and the lighting unit is arranged such that the length direction of the unit is orthogonal to a line segment that bisects the corner of the base. A lighting fixture characterized in that the lighting unit is arranged along the direction and with the center of the lighting unit aligned with the center of the lighting fixture.