JP2007005271A - Ceiling embedded lighting apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lighting apparatus hardly affected by heat conduction from an incandescent lamp as a heat source, with little temperature rise of the apparatus, and of low cost. <P>SOLUTION: The lighting apparatus has a bottom face open type reflectors 20 separated from and facing each other toward inside. An incandescent lamp 30 as a light source is arranged inside the reflector 20. One installation hole 11 is formed at the center of the reflector 20 and at a position displaced to one side from the closest point closest to the incandescent lamp 50. The other installation hole 21 is formed which is displaced to the other side from the closest point to the lamp. A pair of fastening screws 40 which fix the apparatus main body 10 at each of installation holes 11, 21 are provided. A spacer 50 which is interposed between the apparatus main body 10 and the reflector 20 is provided. The spacer 50 is made of a synthetic resin having heat conduction smaller than metal. A receiving hole for penetrating each fastening screw 40 is formed on the spacer 50. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a structure for lowering the temperature of a heat insulating construction type of a ceiling-embedded lighting fixture.

  In general, in the structure of a ceiling-embedded lighting fixture, a fixture for heat insulation construction has a reflective shade directly fixed to the main body with a screw and a heat shield plate attached thereto, or is screwed through a metal spacer with a heat shield structure.

  Generally, in the case of a heat insulation construction type appliance, it is necessary to make the construction that the temperature of the appliance is difficult to rise because the rise of the temperature of the appliance becomes a problem. For that purpose, the central part of the reflective shade is screwed directly to the main body, so heat from the heat source is easily transmitted through the reflective shade, so there is no heat shield on the back of the instrument. However, there was a problem that the instrument embedding depth increased because the instrument temperature could not be lowered. Also, in order to lower the temperature of the instrument, the space between the reflector shade and the instrument body is raised, and when the metal spacer is screwed to the body, heat is transferred from the spacer part to the body, so it is necessary to provide a heat shield structure in the spacer part. There was a problem that the number of points increased and the assembly cost increased. The object of the present invention is to solve the above-mentioned difficulties.

  The present invention includes a reflective shade that is disposed inside a fixture body and that is spaced apart from the fixture body, and includes an incandescent bulb that serves as a heat source that is placed inside the reflective shade. One mounting hole is formed at a position shifted from the closest approach point to the one side, and the other mounting hole is formed at a position shifted from the closest point to the other side. A pair of set screws for screwing and fixing to the instrument body, and a spacer interposed between the instrument body and the reflective shade, the spacer is a member made of a synthetic resin having a smaller thermal conductivity than metal, A receiving hole for penetrating the set screw is formed, and the spacer is formed in a strip shape in which the direction connecting the receiving holes is long and the direction perpendicular thereto is short.

  According to the present invention, in a heat-resistant ceiling-compatible appliance, heat conduction from an incandescent light bulb serving as a heat source is achieved by interposing a synthetic resin spacer having a small thermal conductivity between the reflector shade disposed inside the appliance body and the appliance body. Since it is less affected, it has the effect of preventing the temperature of the instrument from rising. Moreover, since the structure is simple and the number of parts is reduced, the cost can be reduced.

  An embodiment of the present invention will be described with reference to FIG. The fixture main body 10 of the ceiling-embedded lighting fixture is provided with a reflection 20 or the like that is open at the bottom and is opposed to the inside. One mounting hole 11 is formed at a position shifted from the closest point closest to the incandescent bulb 30 to one side in the center of the reflective shade 20, and the other mounting hole 21 shifted from the closest point to the other side is formed. A pair of set screws 40 for fixing the positions of the mounting holes 11 and the mounting holes 2L to the instrument body 10, and a spacer 50 interposed between the instrument body 10 and the reflective shade 20; 50 is made of a synthetic resin having a thermal conductivity smaller than that of a metal, and a receiving hole through which each set screw 40 passes is formed in the spacer 50, and the direction connecting the receiving holes to the spacer 50 is long and orthogonal thereto. Since the heat of the reflecting shade 20 heated by the incandescent bulb 30 as a heat source is difficult to be transmitted to the instrument body 10 by the spacer 50, the outer temperature of the instrument body 10 does not increase. It made. Moreover, since there are few parts, such as a heat shield, it is effective also in cost reduction.

Sectional view of the device of the present invention

Explanation of symbols

10: Instrument body 11: Mounting hole 20: Reflecting shade 21: Mounting hole 30: Incandescent light bulb 40: Set screw 50: Spacer

Claims (1)

  A lower opening-type instrument body, provided with a reflective shade disposed inside the instrument body and spaced apart from the instrument body, and provided with an incandescent bulb disposed inside the reflective shade, at the center of the reflective shade, One mounting hole is formed at a position shifted from the closest point closest to the incandescent bulb to one side, and the other mounting hole is formed at a position shifted from the closest point to the other side. A pair of set screws for screwing the position to the instrument main body, and a spacer interposed between the instrument main body and the reflective shade, the spacer is made of a synthetic resin having a smaller thermal conductivity than metal, A ceiling-embedded luminaire characterized by forming a receiving hole through which a set screw penetrates, and forming the spacer into a strip shape in which the direction connecting the receiving holes is long and the direction perpendicular thereto is short.

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