JPH11213750A - Luminaire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively release the heat of a ballast from an equipment body to prevent the warping of a board by forming corrugated irregularities in the longitudinal direction having slits on both sides on a ballast mounting part. SOLUTION: LA ballast mounting part has slits 18, 18 formed on both sides and a corrugated part 20 having corrugated irregularities in the longitudinal direction, and the top part 20a of the corrugated part 20 is set to the same height. The corrugated part 20 is vertically slightly deformable since it is supported in both ends. The bottom plate of a ballast 1 is placed on a pair of screw mounting protruding parts 15, 15 of an equipment body, screws 35 are inserted thereto from under to fasten and fix the ballast together with nuts 36. Since the height of the screw mounting protruding parts 15 is set equal to or slightly lower than the height of the corrugated part top part 20a, the bottom surface 1 is closely fitted to the corrugated part top part 20a. By providing the corrugated part 20, the radiating area can be extended without using a separate member, and the deformation of the equipment body can be absorbed by the slits 18 situated on both sides of the corrugated part 20 to prevent the damage of a built-in board.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting fixture for effectively radiating heat generated from a ballast having a built-in heat-generating component from a fixture body.

[0002]

2. Description of the Related Art Lighting fixtures shown in FIGS. 6 to 8 have been known for a structure in which heat generated from a ballast is effectively radiated from a fixture body to which the ballast is attached.

The ballast 1 has a substantially U-shaped cross section, a bottom plate 5 having mounting holes 6 and 6 at both ends, a board (not shown) on which electric components and the like mounted on the bottom plate are mounted, and And a box-shaped cover 10 which is attached to the bottom plate 5 so as to cover the upper part of the box. further,
Upper surface 11 and both side surfaces 12, 12 of the cover 10
Are provided with a large number of rectangular air circulation holes 13.

[0004] Below the bottom plate 5 of the ballast, the length is shorter than the mounting hole pitch P formed at both ends of the ballast.
In addition, a corrugated plate 20 is disposed as a heat dissipating member which is formed into a corrugated shape in the longitudinal direction.

[0005] The instrument body 25 to which the ballast is attached is
The cross-sectional shape is substantially U-shaped, and a pair of mounting holes 29, 29 are respectively formed at both ends of the stabilizer mounting portion 28 of the device main body, and the pitch of the mounting holes 29, 29 is
The mounting hole pitch P of the ballast is the same as the mounting hole pitch P of the ballast, and the mounting hole 6 of the ballast and the mounting hole 29 of the instrument body are formed to have substantially the same diameter.

In order to attach the ballast 1 to the instrument body 25,
First, the corrugated plate 20 is placed on the stabilizer mounting portion 28 of the instrument body. Then, the ballast 1 is placed on the corrugated plate 20. In other words, the corrugated plate 20 is sandwiched between the ballast 1 and the main body 25, and the screws 35 are inserted into the mounting holes 29 of the main body and the mounting holes 6 of the ballast from below. A nut 36 is screwed onto a screw portion 35 a projecting upward from 6, and the nut 36 is tightened to fix the ballast 1 to the instrument body 25.

As another form of the prior art, as shown in FIG. 8, a corrugated plate 20 and a heat radiating plate 19 are interposed between the ballast 1 and the fixture body 25, respectively, and the ballast 1 is attached to the fixture body 2
5 includes a screw 35 and a nut 36 for fastening and fixing.

Although the screw 35 and the nut 36 have been described as mounting members for mounting the ballast 1 to the instrument main body 25, as shown in FIG.
It is also conceivable to use a stepped screw 39 composed of 9a, a stepped portion 39b, and a screw portion 39c.

The length of the stepped portion 39b of the stepped screw is determined by the corrugated plate 20 between which the ballast 1 is sandwiched between the ballast 1 and the instrument body 25.
It is formed slightly lower than the height of.

Then, when the corrugated plate 20 is sandwiched between the ballast 1 and the instrument main body 25 using the stepped screw 39 and the ballast 1 is attached to the instrument main body 25, as shown in FIG. 9 (B). As described above, the bottom plate 5 of the ballast does not warp, but the use of the stepped screw 39 increases the cost and is not versatile, so the screw 35 composed of the head 35b and the screw portion 35a is not used. Commonly used.

The heat radiated from the ballast 1 into the ballast is
Heat is radiated to the outside of the ballast 1 through the air circulation holes 13 opened in the cover 10.

On the other hand, the heat transmitted from the substrate (not shown) on which the heat generating member is mounted to the bottom plate 5 is transmitted to the corrugated plate 20,
The heat is radiated from the surface of the corrugated plate 20 and the appliance body 25, and the temperature rise of the ballast 1 is suppressed.

[0013]

As described above, in the conventional lighting fixture, since the corrugated plate 20 which is a separate member is sandwiched between the ballast 1 and the fixture main body 25, heat generated from the ballast is generated. Is radiated to the outside of the ballast 1 through the air flow holes 13 opened in the cover 10 and is radiated along a corrugated sheet made of another member. Since the corrugated sheet is made of a separate member, there are problems that the cost is increased and the assemblability is poor.

Further, since the ballast 1 is fastened and fixed to the instrument body 25 with the screws 35 and the nuts 36 sandwiching the corrugated plate 20, if the nuts 36 are excessively tightened, the figure will As shown in FIG. 7, since there is a step between the ballast 1 and the tool body 25, the ballast is generated, and a substrate (not shown) fixed to the bottom plate 5 of the ballast may be damaged. There was a problem that there is.

[0015] The present invention has been made in view of the above points, and it is an object of the present invention to provide an inexpensive lighting device that effectively dissipates heat of a ballast from a device body and that does not damage a substrate.

[0016]

According to a first aspect of the present invention, there is provided a lighting apparatus according to the present invention, wherein a ballast is fixed to a ballast mounting portion of a fixture body by fixing both ends of the ballast with fixing members. In the lighting fixture to be mounted, the ballast mounting portion is provided with a wavy portion having slits on both sides and having irregularities formed in a wavy shape in a longitudinal direction.

According to a second aspect of the present invention, there is provided a lighting fixture,
A screw attachment protruding portion is formed in the vicinity of both ends of the corrugated portion, which protrudes upward and has a screw fixing hole formed at the same height or slightly lower than the corrugated portion top.

In the structure of the first aspect of the present invention, the corrugated portion having the corrugated shape is provided in the ballast mounting portion of the appliance body, so that the heat radiation area is increased without using a separate member as in the prior art. did. Further, since the slits are provided on both sides of the corrugated portion, when the ballast is attached to the appliance body, the deformation of the appliance body can be absorbed, and the adhesion between the ballast and the corrugated portion can be improved.

According to the second aspect of the present invention, since the screw mounting projections are formed at both ends of the ballast mounting portion of the device main body at the same height as or slightly lower than the top of the corrugated portion, warpage due to mounting of the ballast on the device main body is eliminated. did.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A lighting fixture according to an embodiment of the present invention will be described below with reference to FIGS. Note that the same components as in the prior art will be described with the same reference numerals.

As a lighting fixture in which a ballast is attached to the fixture body, for example, a lighting fixture shown in FIG. 5 is known.

The lighting fixture includes a fixture main body 25 to which the ballast 1 is attached, and a reflector 5 attached below the fixture main body.
0.

The device main body 25 has a rear portion 26 having a substantially U-shaped cross section and a stabilizer mounting portion, and a pair of reinforcing pieces 27 bent downward from opposite sides of the rear portion. 27, and a slit-like mounting hole (not shown) in the longitudinal direction is provided on both sides of both ends of the back side of the device main body.
A substantially rectangular-shaped lamp socket mounting plate 30 is inserted and locked in the mounting hole, and the lamp socket mounting plate 30 swings in the width direction. Further, a ramp socket 32 is provided on the inclined piece 31 of the lamp socket mounting plate 30.
Are attached to both sides of the instrument body so as to face each other.

Reflector 50 mounted below instrument body
Has a substantially V-shaped cross-sectional shape and an upwardly open boat-like shape, and has a ridge line 51 formed on a lower center line of the reflector.
The lamp socket mounting holes 5353 are formed at both ends of the inclined surfaces 52, 52, which have inclined surfaces 52, 52 which are inclined upward in opposite directions. ing. A screw mounting hole 54 is provided outside these lamp socket protrusion holes 43.

The procedure for assembling the lighting fixture will be described.

A lamp socket having a lamp socket attached thereto is attached to each of both ends of the fixture body 25, and the ballast 1 is fixed below the back portion 26 of the fixture body 25 with screws and nuts, which are not shown, as fixtures. Then, the ballast 1 and the lamp socket 32 are connected with the lead wires 55, respectively, and the device main body 25 is mounted on the mounting surface by a method not shown.

Then, the reflector 50 is lifted to the fixture body 25 side, and inserted into the lamp sockets 32 arranged on both ends of the fixture body into the lamp socket protruding holes 53 formed on both ends of the reflector. It is lifted upward, and finally, the screw mounting holes 5 formed in the inclined surfaces 52, 52 of the reflector are formed.
4, insert the decorative screw 56 from the lamp socket mounting plate 3.
Screw it to 0. A straight tube fluorescent lamp 57 is detachably mounted between the lamp sockets 32, 32 projecting downward from both sides of the reflector.

The structure of the ballast attached to the instrument body will be described with reference to FIGS.

The ballast 1 has a bottom plate 5 having a substantially U-shaped cross section.
And a board 40 on which electric components and the like are mounted on the bottom plate, and a box-shaped cover 10 which is mounted on the bottom plate 5 so as to cover an upper portion of the board 40 and is open downward. Upper surface portion 11 and both side surface portions 1 of the cover 10
A large number of rectangular air flow holes 13 are formed in the holes 2 and 12.

The bottom plate 5 having a substantially U-shaped cross section includes a bottom portion 7 having a rectangular shape in the longitudinal direction, and a pair of rising piece portions 8, which are bent upward from both sides of the bottom portion 7. And 8.

At both ends of the bottom portion 7 of the bottom plate, a pair of mounting holes 6, 6 having cross-shaped cuts 6a, 6a, 6a, 6a provided therearound are respectively formed. The cut 6a
Has the same function as the spring washer.

Further, the bottom portion 7 is provided inside the mounting holes 6 and 6.
On both sides, four cut-and-raised pieces 9, 9, 9, 9 are formed at right angles in the width direction so as to face each other. Each of the recesses 9a is provided. Further, on both sides of the rising piece 8 of the bottom plate, there are board stopper pieces 8a, 8a cut and raised in the width direction.
Are provided respectively.

On a substrate 40, a transformer 41, a capacitor 42, a transistor 43, and the like, which constitute electric parts of a ballast, are mounted, and terminals 44 attached to both ends are provided.
Lead wire 45 extends outward. Note that when using the lighting equipment, heat is generated from the transformer 41 and the like.

Next, the procedure for assembling the ballast will be described.

First, an insulating film 47 having a rectangular shape larger than the substrate 40 is placed on the bottom plate 5. Then, as shown in FIG. 3, the substrate 40 is mounted on the substrate mounting recess 9a of the bottom plate.
The substrate 40 is fixed to the bottom plate 5 by fitting it onto the base plates 9a, 9a, and 9a, and bending the substrate stopper pieces 8a provided on the rising pieces of the bottom plate.

The width of the substrate 40 is formed to be slightly smaller than that between the rising pieces of the bottom plate.
Since the length of the substrate 4 is slightly smaller than that of the cut-and-raised piece between the substrate mounting concave portions 9a, 9a,
0 can be fixed to the bottom plate. Then cover 1
0 is fixed to the bottom plate 5 by a method not shown, covering the electric components of the substrate 40.

The instrument body according to the present invention will be described with reference to FIG.

The instrument body 25a according to the present invention is formed by integrally forming the instrument body 25 according to the prior art and a corrugated plate.
The device main body 25a has a substantially U-shaped cross-section and a rectangular rear portion 26 in the longitudinal direction, and is bent upward from both sides of the rear portion 26 in the same manner as in the related art. It is composed of a pair of reinforcing pieces 27, 27.

A pair of screw mounting projections 15, 15 are provided on the center line of both ends of the ballast mounting portion 28 of the instrument body 25a at positions having the same pitch as a pair of mounting holes P provided at both ends of the ballast. Each is provided.

As shown in FIG. 1 (B), the screw mounting protrusion 15 is formed to protrude upward in a truncated cone shape, and the upper portion of the screw mounting protrusion has a disk-shaped flat surface 16. Screw fixing holes 17, 17 are formed in the center of the flat surface, and the pitch of the screw fixing holes 17, 17 is formed to be the same as a pair of mounting hole pitches P provided at both ends of the ballast. ing.

Slits 18 are formed on both sides of the ballast mounting portion 28 between the screw mounting protrusions, and a wave portion 20 having a wave-like unevenness in the longitudinal direction is provided. The tops 20a of the 20 are formed at the same height. Furthermore, since the wave part 20 is supported at both ends of the wave part, the wave part is slightly deformed in the vertical direction.
In addition, the height of the screw mounting protrusion 15 is set at the wave top 20.
It is formed at the same height or slightly lower than a.

FIG. 4 shows a procedure for assembling the ballast to the instrument body.
This will be described with reference to FIG.

First, the bottom plate 5 of the ballast 1 is placed on a pair of screw mounting protrusions 15 provided on the back of the instrument body, and the mounting holes 6 and 6 of the ballast are mounted on the screw mounting protrusions. Align with the screw fixing holes 17 provided.

Then, a screw 35 as a fixing tool is inserted from below the screw fixing hole 17 in the instrument body, and a nut 36 as a fixing tool is screwed into a screw portion 35a of the screw projecting on the bottom plate of the ballast. By turning the nut in the tightening direction, the ballast 1 is screwed to the instrument body 25a by the screw 35 and the nut 36.
Tighten and fix with.

The ballast 1 is connected to the screw mounting protrusion 1 of the instrument body.
Since the height of the screw mounting projection is formed to be the same height as or slightly lower than the top of the corrugated portion when placed on the top of the corrugation, the bottom portion of the ballast contacts the top of the corrugated portion. It is placed in the state where it was done. Further, since the ballast is tightened with a nut and fixed to the instrument body, the bottom portion of the ballast is attached to the corrugated portion more closely.

Further, since the slits are provided on both sides of the corrugated portion, the deformation of the instrument body is absorbed, and the adhesion between the stabilizer and the corrugated portion of the instrument body is further enhanced.

Next, the operation of the luminaire according to the above embodiment will be described.

In the structure according to the first aspect of the present invention, a corrugated portion having a corrugated shape is provided in the ballast mounting portion of the appliance body, and the heat radiation area is increased without using a separate member. Further, since the slits are provided on both sides of the corrugated portion, when the ballast is attached to the appliance body, the deformation of the appliance body is absorbed, and the adhesion between the ballast and the corrugated portion of the appliance body is enhanced.

In the structure according to the second aspect, since the screw mounting projections are formed at both ends of the ballast mounting portion of the device main body at the same height as or slightly lower than the top of the corrugated portion, warpage due to mounting of the ballast to the device main body is provided. As a result, damage to the board and the like built in the ballast due to warpage can be eliminated.

[0050]

As described in detail above, according to the first aspect of the present invention, a corrugated portion having corrugations formed in the longitudinal direction of the ballast mounting portion of the appliance body to which the ballast is mounted is provided. Therefore, the heat radiation area is increased without using a separate member, and the heat radiation performance is improved.

Furthermore, since slits are provided on both sides of the corrugated portion, deformation of the instrument body can be absorbed, and the adhesion of the ballast can be improved.

According to the second aspect of the present invention, a pair of screw mounting protrusions formed at the same height or slightly lower than the height of the corrugated portion is provided near both ends of the corrugated portion. Since the warpage of the mounted board or the like has been eliminated, damage to the board or the like due to the warpage can be eliminated.

[Brief description of the drawings]

FIG. 1 shows a configuration of a device main body according to a first embodiment of the present invention and a ballast attached to the device main body,
(A) is an exploded perspective view. (B) is a wave part sectional view showing the AA section of the bottom part of the instrument body.

FIG. 2 shows the ballast according to the first embodiment, and FIG. 2 (A) is an exploded perspective view. (B) is an enlarged top view showing the mounting holes provided in the bottom plate of the ballast.

FIG. 3 is an exemplary perspective view showing a state in which a board on which electric components are mounted is fixed to a bottom plate of the ballast according to the first embodiment;

FIG. 4 is a front sectional view showing a state in which the ballast according to the first embodiment is fastened and fixed to a fixture main body with screws and nuts as fixtures.

FIG. 5 is an exploded perspective view showing a general lighting fixture having a ballast.

FIG. 6 is an exploded perspective view showing a configuration of a device main body and a ballast attached to the device main body in the related art.

FIG. 7 is a front view showing a state where the ballast of the lighting fixture according to the above is excessively tightened with a nut which is a fixture to the fixture body.

FIG. 8 is an exploded perspective view showing the configuration of another lighting apparatus according to the related art.

FIG. 9 is an exploded perspective view showing a configuration of a lighting device using a stepped screw in place of a screw according to the related art, wherein FIG. (B) is a front view showing the assembled state of the lighting fixture.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Ballast, 15 ... Screw mounting protrusion, 17 ... Screw fixing hole, 18 ... Slit, 20 ... Wave part, 20a ... Wave part top part, 28 ... Ballast mounting part, 35 ... Screw (fixture), 36 ... Nuts (fixtures).

Claims (2)

[Claims] 1. A lighting device for mounting a ballast on a ballast mounting portion of a device body by fixing both ends of the ballast with fixing devices, wherein the ballast mounting portion has a wavy shape in a longitudinal direction having slits on both sides. An illuminating device comprising a wave portion formed with. 2. A screw mounting protruding portion projecting upward and having the same height or slightly lower than the top of the corrugated portion and having a screw fixing hole is provided near both ends of the corrugated portion. The lighting fixture according to claim 1.