JP5223131B2 - Ceiling light fixture - Google Patents

Description

  The present invention relates to an improvement of a ceiling luminaire used by being attached to a ceiling of a factory, a commercial facility or the like.

Conventionally, ceiling lighting fixtures used on the ceiling of factories and commercial facilities, etc., have a socket fixed inside the cylindrical ceiling lighting fixture body, and light distribution control near the lower end of the ceiling lighting fixture body There is a structure that supports and supports the shades.
JP-A-2004-349235 (FIG. 1) JP-A-7-249309 (FIG. 1)

However, when lighting with a high-efficiency discharge lamp in a ceiling lighting fixture, the high heat generated from the discharge lamp is accumulated, the discharge lamp itself has a short life, and the outer wall of the lighting fixture body or the shade also has a considerably high temperature. There are disadvantages.
In addition, since the shade controls the light distribution, the relationship between the position of the shade and the light source is important. However, there are many shades that are configured by being placed on the shade support portion of the cylindrical lighting fixture body.
For this reason, when there is vibration such as an earthquake, the shade may be slightly inclined, and a desired light distribution may not be obtained. In addition, there is a drawback that the illuminance of the irradiated surface immediately below the shade becomes particularly high, and the variation in illuminance on the irradiated surface becomes large.
The present invention has been made in view of the above circumstances, and provides a cylindrical ceiling lighting device that can prevent the inside of the lighting device from becoming high temperature and can obtain a predetermined light distribution. The purpose is to do.

In order to solve the above-mentioned problem, according to a first aspect of the present invention, there is provided a cylindrical cover having a large number of heat radiation holes on the outer periphery, a socket disposed on the lower surface, and a ballast disposed above the socket. An electrical component support body mounted inside the cover and a hole for inserting the socket, and a shade support portion for supporting a shade having a prism formed on the entire outer surface. A plurality of air holes are formed in the outer periphery of the upper wall of the hole to be inserted, and the shade and the cylindrical cover are formed so that a part of the high heat of the light source attached to the socket is removed from the air hole to the outside. and the ring receiving stepped configured with a predetermined gap between, on the shade supporting portion of receiving with the stepped ring with engages support the upper end of the shade, the shade support of receiving with the stepped ring Apply white paint on the lower surface of the It is configured to scatter reflected light and reduce the amount of light that irradiates directly under the shade.Furthermore, holes are formed in the vertical wall of the step receiving ring at predetermined intervals, and a part of the support spring is formed from the holes. The support spring is configured to be engaged with and supported by the shade support portion of the stepped receiving ring to press a part of the shade.
According to the lighting fixture for ceiling according to claim 1, since the shade is reliably hooked and supported by the shade support portion of the step receiving ring, the positional relationship between the shade and the lamp is constant, and a desired light distribution can be obtained. . Moreover, since high heat is discharged | emitted outside the lighting fixture, it can prevent that a ballast becomes high temperature.

In addition , a plurality of air holes are formed on the outer periphery of the upper wall of the hole through which the socket of the step receiving ring is inserted, and a part of the high heat of the light source attached to the socket through the air hole is extracted to the outside. Therefore, since the high heat is discharged to the outside of the lighting fixture, it is possible to prevent the ballast from becoming high temperature, and it is possible to prevent the discharge lamp itself from having a short life due to the high temperature.

Further, the step receiving ring is configured with a predetermined interval between the cylindrical cover and the shade, and a part of high heat is extracted from the air hole of the step receiving ring to the outside. Since the high heat is discharged to the outside of the lighting fixture, it is possible to prevent the ballast from becoming high temperature, and it is possible to prevent the discharge lamp itself from having a short life due to the high temperature.

  According to the above-described present invention, it is possible to provide a cylindrical ceiling lighting device that can prevent the inside of the lighting device from becoming high temperature and can obtain a predetermined light distribution.

  The best mode of the lighting fixture for ceiling according to the present invention will be described below with reference to FIGS.

  A first embodiment will be described with reference to FIGS. 1 is a partially cutaway front view of a ceiling luminaire according to the present invention, FIG. 2 is a perspective view of an electric component support, FIG. 3 is a perspective view of a stepped receiving ring, and FIG. 4 is a cylinder showing a flow of high heat. FIG. 5 is a partially cutaway front view of the stepped receiving ring, and FIG. 6 is a partially cutaway front view of the shade. In FIG. 1, 1 is a cylindrical cover which comprises a lighting fixture main body, Comprising: The outer periphery has many heat-radiation holes 2, and is comprised. The cylindrical cover 1 is made of, for example, a punching material, and the large number of heat radiation holes 2 are made to have a size of about 3 mmΦ. In FIG. 2, reference numeral 3 denotes an electrical component support mounted inside the cylindrical cover, and is configured to have bent pieces 4 and 5 at right angles at the upper and lower ends. Reference numeral 6 denotes a socket fixed to the lower surface of the bent piece 5 at the lower end, for example, to which a high-pressure discharge lamp 7 is attached. Reference numeral 8 denotes a ballast which is arranged on the upper part of the socket and supported by the electric component support 3. 9 is a hanging tool that is supported on the upper end of a cylindrical cover constituting the luminaire body.

In FIG. 3, reference numeral 10 denotes a stepped receiving ring having a shade support portion 11 on the outer periphery, which is formed in a circular shape. 12 is a hole for inserting a socket formed in the approximate center of the upper wall of the stepped receiving ring 10, and a plurality of air holes 13 are formed in the outer periphery of the hole 12, as shown in FIG. A part of the high heat of the light source mounted on the socket from the air hole 13 is configured to escape to the outside.
Further, the lower surface of the shade support portion 11 on the outer periphery of the step receiving ring 10 is configured so that the reflected light is not irradiated directly under the shade. In order to reduce the light that the reflected light irradiates directly under the shade, for example, the lower surface of the shade support portion 11 on the outer periphery of the step receiving ring 10 is configured to be white coated so that the reflected light is scattered. .

As shown in FIG. 5, holes 15 are formed in the vertical wall of the stepped receiving ring 10 at a predetermined interval, and a part of the support spring 16 protrudes from the holes. The support spring 16 is configured to press a part of the shade that is hooked and supported by the shade support portion 11 of the stepped receiving ring, thereby providing a retaining prevention structure. According to this structure, the shade is reliably hooked and supported by the shade support portion of the step receiving ring, so that the positional relationship between the shade and the lamp is constant, and a desired light distribution can be obtained.

In FIG. 6, 20 is a shade, which is made of, for example, an acrylic material, and is formed by forming a prism on the entire outer surface. Further, the shade 20 is configured by connecting a plurality of surfaces with different angles on a vertical cross-sectional wall surface. A plurality of surfaces having different angles are configured as seven surfaces, for example, so as to control light distribution. The upper two steps of the shade formed by the prism are configured to be placed on and contact the shade support portion of the stepped receiving ring 10.

Next, the experimental results in Example 1 will be described. The experimental conditions in Example 1 are as follows.
Light source: 150 watt high-pressure discharge lamp luminaire main body cylindrical cover: many heat-dissipation holes are formed on the entire outer surface. Shade: Acrylic material with lower surface open as shown in the drawing. Vertical dimension 28.5 cm, lower end diameter 41.4cm
Temperature of the outer wall of the middle part of the vertical wall of the lighting fixture body: 60 degrees (when the ambient temperature is 30 degrees)
Temperature of the middle part of the vertical wall of the shade: 57 degrees (when the ambient temperature is 30 degrees)

According to the ceiling lighting device described in the first embodiment, the shade is reliably hooked and supported by the shade support portion of the step receiving ring, the positional relationship between the shade and the lamp is constant, and a desired light distribution can be obtained. . Moreover, since high heat is discharged | emitted outside a lighting fixture as shown to an experimental result, it can suppress that the cylindrical cover body and shade which comprise a lighting fixture main body become high temperature.
Further, it is possible to prevent the ballast or the lamp itself from becoming high temperature and shortening its life.

Next, a second embodiment will be described with reference to FIGS. Example 2 is an example in which a compact fluorescent lamp is mounted. FIG. 7 is a partially cutaway front view of Embodiment 2 of the ceiling lighting device according to the present invention, and FIG. 8 is a plan view of a flat plate arranged on the lower surface of the step receiving ring.
Regarding the second embodiment, detailed description of the technical contents common to the first embodiment will be omitted, and the technical contents which are mainly different will be described. Example 2 has a structure in which four compact fluorescent lamps are mounted.
In FIG. 8, 30 is a flat plate having a structure in which four compact fluorescent lamps are mounted. In the flat plate 30, 31 is a hole for inserting a 42 watt compact fluorescent lamp, for example, and is configured at equal intervals in four places. Reference numeral 32 denotes a lead wire insertion hole configured corresponding to the hole 31. As shown in FIG. 7, the flat plate 30 is screwed and supported at the lower end of the stepped receiving ring 10. In FIG. 7, reference numeral 1 denotes a cylindrical cover constituting the luminaire main body, which has a large number of heat radiation holes 2 on the outer periphery, and is the same as that shown in the first embodiment. In FIG. 7, reference numeral 3 denotes an electrical component support mounted inside the cylindrical cover, which is configured to have bent pieces 4 and 5 at right angles at the upper and lower ends, and is the same as that shown in the first embodiment. is there. The electric component support 3 is configured to support a ballast 8.

In FIG. 7, reference numeral 10 denotes a stepped receiving ring having a shade support portion 11 on the outer periphery, which is formed in a circular shape and is the same as that shown in the first embodiment. Reference numeral 20 denotes a shade, which has the same structure as that shown in the first embodiment.
Further, the lower surface of the flat plate 30 in the second embodiment is configured by applying white coating so that the reflected light is scattered, and the reflected light is configured to irradiate light directly below the shade.
Reference numeral 33 denotes a compact fluorescent lamp socket fixed to the flat plate 30, and is provided at four equal intervals. Reference numeral 34 denotes a compact fluorescent lamp mounted on a compact fluorescent lamp socket, which is constructed using, for example, a 42-watt lamp.

Next, the experimental results in Example 2 will be described. The experimental conditions in Example 2 are as follows.
Light source: 42 watt compact fluorescent lamp 4 lamps Cylinder covering that constitutes the luminaire body: A large number of heat radiation holes are formed on the entire outer surface. Shade: Acrylic material is open on the lower surface. Vertical dimension is 28.5 cm, lower end. Diameter of 41.4cm
Temperature of the outer wall of the middle part of the vertical wall of the lighting fixture body: 58 degrees (when the ambient temperature is 30 degrees)
Temperature of the middle part of the vertical wall of the shade: 55 degrees (when the ambient temperature is 30 degrees)

According to the ceiling lighting apparatus described in the second embodiment, the shade is securely hooked and supported by the shade support portion of the step receiving ring, the positional relationship between the shade and the lamp is constant, and a desired light distribution can be obtained. it can. Moreover, since high heat is discharged | emitted outside a lighting fixture as shown to an experimental result, it can suppress that the cylindrical cover body and shade which comprise a lighting fixture main body become high temperature.
Further, it is possible to prevent the ballast or the lamp itself from becoming high temperature and shortening its life.

Next, Example 3 will be described with reference to FIG. The third embodiment relates to a stepped receiving ring 40 suitable for a structure in which a relatively low watt high-pressure discharge lamp having a relatively low calorific value of about 70 watts is mounted. Since the structure other than the stepped receiving ring 40 is the same as that shown in the first and second embodiments, a detailed description thereof will be omitted.
In FIG. 9, the stepped receiving ring 40 is formed in a circular shape as a whole, and has a hole 41 through which a socket is inserted substantially at the center of the upper wall. Further, a shade support portion 42 is formed on the outer periphery of the stepped receiving ring 40 so that the shades shown in the first and second embodiments are supported. Further, the lower surface of the shade support part 42 is configured by applying white coating so that the reflected light is scattered, and the reflected light is configured to irradiate light immediately below the shade. The technical contents are the same as those shown in the first embodiment.

Further, as shown in FIG. 9, holes 43 are formed in the vertical wall of the stepped receiving ring 40 at predetermined intervals, and a part of the support spring 44 is projected from the holes. The support spring 44 is configured to press a part of the shade that is hooked and supported by the shade support portion 42 of the stepped receiving ring, thereby providing a prevention structure. The technical contents are the same as those shown in the first embodiment.

The conditions of each part used for the experiment in Example 3 are as follows.
Light source: Cylindrical cover constituting 70 watt high pressure discharge lamp illuminator main body: Many heat radiation holes are formed on the entire outer surface. Shade: Acrylic material with lower surface opened as shown in the drawing. Vertical dimension 20 cm, lower end diameter 31. 5cm
Temperature of the outer wall of the middle part of the vertical wall of the lighting fixture body: 54 degrees (when the ambient temperature is 30 degrees)
Temperature of the middle part of the vertical wall of the shade: 52 degrees (when the ambient temperature is 30 degrees)

  According to the ceiling lighting device described in the third embodiment, the amount of heat generated is relatively small, so that heat is not accumulated in the lighting device and the high-pressure discharge lamp does not have a short life. Does not become hot.

The partially notched front view of the lighting fixture for ceilings concerning this invention. FIG. 2 is a perspective view of the electrical component support. The perspective view of a step receiving ring. A perspective view of a cylindrical cover and a stepped receiving ring portion showing a flow of high heat, The front view of a stepped receiving ring with a part cut away. FIG. The partially notched front view which shows the other Example of the lighting fixture for ceilings concerning this invention. The top view of the flat plate arrange | positioned on the lower surface of the stepped receiving ring of FIG. The perspective view of the other step receiving ring which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cylindrical cover 2 which comprises a lighting fixture main body 2 Radiation hole 3 Electrical component support body 6 Socket 7 High pressure discharge lamp 8 Ballast 10 Step receiving ring 12 Air hole 13 Air hole 11 Said support part 15 Air hole 16 Support spring 20 Seed 30 Flat plate 31 Hole 32 Lead wire insertion hole 33 Compact fluorescent lamp socket 34 Compact fluorescent lamp 40 Stepped receiving ring 41 Hole 42 Sade support portion 43 Hole 44 Support spring

Claims (1)

A cylindrical cover having a large number of heat dissipation holes on the outer periphery, a socket on the lower surface, a ballast placed on the top of the socket, and an electrical component support mounted inside the cylindrical cover,
Forming a hole through which the socket is inserted, and having a shade support portion on the outer periphery for supporting a shade having a prism formed on the entire outer surface;
A plurality of air holes are formed in the outer periphery of the upper wall of the air hole through which the socket is inserted, and the shade and the cylinder are formed so that a part of the high heat of the light source attached to the socket is removed from the air hole to the outside. A step receiving ring configured with a predetermined interval between the cover and the cover ;
While hooking and supporting the upper end portion of the shade to the shade support portion of the stepped receiving ring,
A white coating is applied to the lower surface of the shade support part of the stepped receiving ring, the reflected light from the lower surface is scattered, and the amount of light irradiated directly under the shade is reduced,
Further, holes are formed at predetermined intervals in the vertical wall of the stepped receiving ring, a part of the support spring is protruded from the hole, and the support spring is engaged with and supported by the shade support portion of the stepped receiving ring. A ceiling luminaire characterized by being configured to press a part of the shade.

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