JP2009104912A - Translucent cover assembly device of downlight - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a translucent cover assembly device of a downlight in which a handling operation of a mounting screw to fasten a translucent cover to a lighting apparatus main body can be done easily and furthermore, there is no possibility of dropping the mounting screw on a floor during the operation. <P>SOLUTION: The translucent cover 2 is assembled to an apparatus main body 1 by screwing and fastening the top end screw portion 10a of a mounting screw 10 of which the head portion 10c is locked to the fringe of a screw hole 5, through a screw hole 8 provided at the periphery fringe of the translucent cover 2 superimposed on the opening fringe into the screw hole 5 provided at the opening fringe of the apparatus main body 1 with the lower part open that is installed on the ceiling Ba. Furthermore, a vacant chamber 6 longer than the top end screw portion 10a of the mounting screw 10 is provided between the screw hole 8 and the screw hole 5. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a device for assembling a light-transmitting cover of a downlight (usually a small luminaire embedded in a ceiling, but including a similar one here).

  In order to assemble the translucent cover to the so-called downlight luminaire main body, there is a structure in which an assembly screw is passed through the translucent cover and screwed into the main body to be tightened (for example, Patent Document 1).

Japanese Utility Model Publication No. 3-10416

  The conventional example can obtain a stable assembled state of the translucent cover with respect to the luminaire main body incorporating the electric lamp etc., and there is no inconvenience in this sense. When it is necessary to open the lower surface of the opening of the instrument body, it is necessary to remove the assembly screw by an operation from the lower side of the translucent cover because of downlight. At the time of removal, the assembly screw is formed separately from the translucent cover and the like, so there is a possibility that the assembly screw may be dropped from the hand by an erroneous operation.

  The present invention was devised for the purpose of providing a translucent cover assembling apparatus for a downlight that eliminates the disadvantages of the conventional example and can easily handle the assembly screw.

  The head is passed through the screw hole provided in the peripheral edge of the translucent cover superimposed on the opening edge of the screw hole provided in the opening edge of the lighting fixture main body having an opening on the bottom surface attached to the ceiling. The tip screw portion of the assembly screw locked to the edge portion is screwed and tightened to assemble the translucent cover to the luminaire body, and the tip of the assembly screw between the screw hole and the screw hole. This is a configuration in which a vacant space longer than the threaded portion is provided.

  According to the configuration of the present invention, when the assembly screw is removed from the screw hole side on the main body side, the screw portion of the assembly screw engages with the inside of the empty chamber and is engaged with the edge portion of the screw hole provided on the translucent cover side. It can be locked to avoid the possibility of the assembly screws falling from the translucent cover to the floor, and when screwing the screw part into the screw hole (attaching the translucent cover to the lighting fixture body) , Downlight translucent cover assembly device that eliminates the need to grip the assembly screw head with the fingertip, and therefore allows easy screwing operation to the screw hole, and generally facilitates assembly and removal of the translucent cover Can provide.

  The drawings show an embodiment of a downlight translucent cover assembling apparatus according to the present invention, FIG. 1 is a schematic front view showing an application position of the apparatus of the present invention, and FIG. 2 is a partially enlarged sectional view of FIG. 3 is a partially enlarged view of FIG. 2, FIG. 4 is a cross-sectional view showing the relationship between the translucent cover and the assembly screw, and FIG. 5 is an enlarged cross-sectional view of a part of the translucent cover.

  The downlight A of the embodiment is configured to irradiate the inside of the box B from above by installing it on the ceiling Ba of the loading box B of the luggage carrier C, but not only illuminating the interior of the loading box B, Of course, you may apply as a lighting fixture of a general house.

  The downlight A includes a luminaire main body 1 having a built-in electric lamp (fluorescent lamp in the embodiment) L and a translucent cover 2 that closes the lower surface of the opening of the main body 1.

  The luminaire main body 1 is formed of a rectangular frame having an opening on the lower surface and provided with a flange piece 1a surrounding the opening 1 'at an edge portion constituting the opening 1'. A short columnar projecting portion 3 is provided in the depth direction of the main body 1 at the four corners of the main body 1 and at the central portion of the long side of the rectangular frame. At the axial position of the protruding portion 3, a through hole having a large diameter hole on the protruding portion 3 side and a small diameter hole on the flange piece 1 a side is provided, and the screw cylinder member 4 is fitted into the large diameter hole portion of the through hole. Then, the screw hole 5 is located on the axis of the projecting portion 3, is constituted by the small diameter hole, and communicates with the void forming hole 6 a having a larger diameter than the screw hole 5. The luminaire main body 1 is fastened by receiving the outer end 1a ′ of the flange piece 1a on the constituent material Ba ′ of the ceiling Ba (fastening means is not shown) and buried in the ceiling Ba. It is crowded.

  The translucent cover 2 includes a Fresnel lens body 2a that overlaps the opening 1 'of the main body 1, and the void forming hole provided on the main body 1 side of the peripheral end 2b that surrounds the lens body 2a. 6a thru | or the recessed part 7 in the surface 2b 'side of the part corresponding to the screw hole 5, and the back surface 2b' 'side are provided with the vacancy formation hole 6b provided in agreement with the said vacancy formation hole 6a, The vacant space forming hole 6b on the cover 2 side and the recessed portion 7 are configured to communicate with each other through a screw hole 8 that is positioned coaxially therewith.

  The translucent cover 2 is fitted on the surface side of the collar piece 1a of the main body 1 (on the side opposite to the protruding portion 3) and is fitted inside the protruding wall portion 9 provided so as to surround the opening 1 '. The screw portion 10a on the tip end side of the screw 10 is threaded through the screw hole 8, and the head portion 10c is engaged with the screw hole 5 on the main body 1 side through the void forming holes 6b and 6a in the recessed portion 7. By screwing to the position, it is fastened to the luminaire main body 1 to protect the lamp L and other devices built in the main body 1.

  The assembly screw 10 is formed by interposing a non-threaded portion 10b between the head portion 10c and the screw portion 10a on the distal end side, and is formed by making the vacant space forming holes 6a and 6b coincide with each other. The length is longer than the length of the threaded portion 10a of the assembly screw 10.

  For example, when it is necessary to open the opening 1 ′ of the luminaire main body 1 when replacing the lamp L, when the assembly screw 10 is loosened and removed from the screw hole 5 on the main body 1 side, The screw portion 10 a is engaged with the empty space 6, is engaged with the edge portion of the screw hole 8 of the translucent cover 2, and is hooked on the cover 2 without falling.

  The vacant chamber 6 is formed when the translucent cover 2 is fastened to the luminaire main body 1 by using the assembly screw 10 and its length is longer than the screw portion 10a that is screwed into the screw hole 5 on the main body 1 side. Therefore, it is not inconvenient if the vacant hole forming the vacant chamber 6 is provided only on one side of the main body 1 and the cover 2.

  In addition, it is not necessarily inconvenient to use the so-called tapping screw in place of the assembly screw 10 of the embodiment, but in this case, a female screw is formed on the main body 1 and the cover 2 by the tapping screw. Therefore, a synthetic resin capable of forming a female screw should be used for the material of the main body 1 and the like.

The schematic front view which shows the application position of this invention apparatus. The partially expanded sectional view of FIG. FIG. 3 is a partially enlarged view of FIG. 2. Sectional drawing which shows the relationship between a translucent cover and an assembly | attachment screw. The expanded sectional view of a part of translucent cover.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lighting fixture main body 2 Translucent cover 5 Screw hole 6 Empty room 8 Screw hole 10 Assembly screw 10a Screw part 10c Head

Claims (1)

  The head is passed through the screw hole provided in the peripheral edge of the translucent cover superimposed on the opening edge of the screw hole provided in the opening edge of the lighting fixture main body having an opening on the bottom surface attached to the ceiling. The tip screw portion of the assembly screw locked to the edge portion is screwed and tightened to assemble the translucent cover to the luminaire body, and the tip of the assembly screw between the screw hole and the screw hole. Downlight translucent cover assembling device provided with a vacant space longer than the threaded portion.

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