JP2011065923A - Luminaire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a luminaire capable of grounding a luminaire body to the construction surface of the ceiling, by reliably screwing a grounding screw into a screw hole without increasing the board thickness of the luminaire body and preventing an increase of parts count. <P>SOLUTION: In the luminaire 10, the grounding screw 17 is disposed on the top face of the luminaire body 11 and is grounded to the construction surface of the ceiling. The screw hole 18 to screw the grounding screw 17 is formed with an insertion hole 27 and a peripheral rib 28 formed on the outer periphery of the insertion hole 27. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a direct-mounted lighting fixture that is directly attached to a ceiling construction surface of a house or the like, for example.

  As an example of a conventional lighting fixture, there is one in which a fixture main body provided with a mounting hole in a central portion is directly attached to a ceiling construction surface via an elastic member (for example, see Patent Document 1).

Japanese Patent Laying-Open No. 2005-78920 (FIG. 4, paragraph number 0037)

  Normally, in a lighting fixture that is directly attached to a ceiling construction surface, it is desirable to ground the fixture body to the ceiling construction surface side.

  However, in the conventional lighting fixture disclosed in Patent Document 1, the fixture main body is not grounded to the ceiling construction surface side. Therefore, a means for grounding the appliance body to the ceiling construction surface side is necessary.

  By the way, as an example of means for grounding the fixture body to the ceiling construction surface side in the lighting fixture directly attached to the ceiling construction surface, as shown in FIG. 5, a grounding screw 101 grounded to the ceiling construction surface side is provided. There is a lighting fixture 100 in which a screw hole 102 for insertion is formed on the upper surface of a fixture main body 103 made of a thin steel plate.

  The screw hole 102 is formed in a cylindrical shape by burring the tool body 103. When a grounding terminal or the like is screwed into the screw hole 102 with the grounding screw 101, the screw is cut into the screw hole 102 by screwing the grounding screw 101 into the screw hole 102.

However, as the grounding screw 101 is screwed in, the root ineffective screw portion (incomplete screw portion) 104 of the grounding screw 101 comes into contact with the screw hole 102, and the grounding screw 101 is screwed into the screw hole 102. Therefore, it can be a so-called screw idiot.
Therefore, in order to securely screw the grounding screw 101 into the screw hole 102, the plate thickness of the instrument main body 103 is increased so as to increase the length of the screw or the washer 105 is added. When the plate thickness of 103 is increased, the overall weight may increase, and when the washer 105 is added, the number of parts may increase.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to prevent an increase in the number of parts without increasing the plate thickness of the instrument body and to securely screw the ground screw into the screw hole. It is to provide a lighting fixture that can ground the fixture body to the ceiling construction surface side.

  A lighting fixture according to the present invention includes a fixture body that is directly attached to a ceiling construction surface, a ballast that is attached to the fixture body and that supplies power to a fluorescent lamp, and a block that also serves as a charging unit protection that covers the fixture body and the ballast A cover, a fluorescent lamp held on the lower surface of the block cover, a translucent cover that covers the lower surface of the instrument body including the fluorescent lamp, and an upper surface of the instrument body, on the ceiling construction surface side A screw hole for screwing a grounding screw to be grounded, wherein the screw hole includes an insertion hole portion and a peripheral rib formed on an outer edge of the insertion hole portion. It is formed.

In the present invention, the screw hole for inserting the grounding screw is formed with the insertion hole portion and the peripheral rib formed on the outer edge of the insertion hole portion, so that the complete screw portion of the grounding screw is the insertion hole portion. Since the incomplete screw portion of the grounding screw is positioned on the peripheral rib when being screwed into the screw, the incomplete screw portion is not brought into contact with the insertion hole portion.
Accordingly, the increase in the number of parts can be prevented without increasing the plate thickness of the instrument main body, and the grounding screw can be securely screwed into the screw hole to allow the instrument main body to be grounded to the ceiling construction surface side.

  In the lighting fixture according to the present invention, in the lighting fixture described above, the peripheral rib of the screw hole is in a state in which the grounding screw is screwed in from the height of the protruding portion that contacts the ceiling construction surface of the fixture main body. The head of the grounding screw is arranged low.

In the present invention, when the projecting portion of the fixture body comes into contact with the ceiling construction surface, the grounding screw has a head located lower than the height of the projecting portion by the peripheral rib of the screw hole. Does not touch the ceiling construction surface.
Therefore, it can be installed without affecting the ceiling construction surface.

  The lighting fixture according to the present invention is characterized in that, in the lighting fixture, the peripheral rib of the screw hole can guide the grounding screw to a normal position.

In the present invention, when the grounding screw is screwed into the screw hole, the peripheral rib of the screw hole guides the grounding screw to the normal position.
As a result, the grounding screw that advances while being guided by the peripheral rib does not fall down with respect to the screw hole.
Therefore, the grounding screw can be screwed into the screw hole without any trouble such as falling down.

  The luminaire according to the present invention is characterized in that, in the luminaire described above, the peripheral rib of the screw hole is set to have a gentler outer rising gradient than an inner rising gradient.

In the present invention, the peripheral rib of the screw hole is set so that the outer rising gradient is gentler than the inner rising gradient.
As a result, the grounding screw is automatically positioned concentrically with the insertion hole by the inner peripheral rib having a steep rise.
Therefore, the grounding screw can be securely screwed into the screw hole.

  The luminaire according to the present invention is characterized in that, in the luminaire described above, the insertion hole portion of the screw hole is formed so that its inner diameter dimension gradually decreases toward the tip.

In the present invention, the insertion hole portion of the screw hole is formed in a tapered shape that gradually decreases in inner diameter dimension toward the tip.
As a result, while being screwed into the screw hole, the grounding screw is screwed into the insertion hole while being guided in a tapered shape.
Therefore, a screw can be reliably carved in the insertion hole.

According to the lighting fixture of the present invention, the screw hole for inserting the grounding screw that is arranged on the upper surface of the fixture main body and is grounded to the ceiling construction surface side is formed at the insertion hole portion and the outer edge of the insertion hole portion. And a circumferential rib.
This prevents the increase in the number of parts without increasing the plate thickness of the instrument body, and allows the instrument body to be grounded to the ceiling construction surface side by securely screwing the ground screw into the screw hole. Have.

The vertical sectional view of the lighting fixture of one embodiment concerning the present invention Bottom view of the lighting fixture of FIG. Vertical sectional view around the screw hole in the lighting apparatus of FIG. Vertical sectional view around the grounding screw in the lighting apparatus of FIG. Vertical sectional view around screw for grounding in conventional lighting fixture

  Hereinafter, the lighting fixture which concerns on one Embodiment of this invention is demonstrated with reference to drawings.

  A lighting fixture 10 according to an embodiment of the present invention includes a fixture main body 11 that is directly attached to the ceiling construction surface 1, a mounting holder 12 that is attached to the fixture main body 11, and fluorescent lamps 13 and 13 that are attached to the fixture main body 11. A ballast 14 for supplying power to the battery, a block cover 15 that also serves as a protection for the charging unit covering the appliance body 11 and the ballast 14, fluorescent lamps 13 and 13 held on the lower surface of the block cover 15, and fluorescent lamps 13 and 13. A translucent cover 16 that covers the lower surface of the instrument main body 11 that is included, and a screw hole 18 into which a grounding screw 17 that is arranged on the upper surface of the instrument main body 11 and is grounded to the ceiling construction surface 1 side is screwed.

  As shown in FIGS. 1 and 2, the instrument body 11 is formed in a disc shape using, for example, a thin steel plate material having a thickness dimension of 0.4 mm. A mounting hole 19 is formed in the central portion of the instrument body 11 so as to be covered by a not-shown part for saving construction provided on the ceiling construction surface 1.

  The instrument body 11 is formed with a plurality of protruding portions 20 protruding upward on the outer peripheral portion of the mounting hole 19. The protrusion 20 abuts against the ceiling construction surface 1. A plurality of rib protrusions 21 are radially formed around the attachment hole 19 on the outside of the protrusion 20. The rib protrusions 21 are lower in height than the protrusions 20.

  The attachment holder 12 is formed in an oval shape using, for example, a hard resin material, and is attached to the attachment hole 19 of the instrument body 11. The mounting holder 12 holds a power line 22 that is electrically connected to a part for saving construction.

  The ballast 14 incorporates an electronic component such as an inverter circuit, and is attached to the outside of the attachment hole 19 on the lower surface of the fixture body 11. A power supply line 22 is electrically connected to the ballast 14, and an instrument wiring 23 drawn from the ballast 14 is electrically connected to the socket 24. The socket 24 is electrically connected to the fluorescent lamps 13 and 13.

  The block cover 15 is formed in a curved disk shape that is smaller than the outer diameter of the instrument body 11. The block cover 15 also serves as a reflector and a live part protection, and covers the ballast 14 and is screwed to the lower surface of the appliance main body 11.

  The fluorescent lamps 13 and 13 are double annular fluorescent lamps, and are held below the instrument body 11 by a plurality of lamp holding parts 25 screwed to the block cover 15.

  The cover 16 is made of a milky white resin having translucency, for example, and is curved so that the lower part is convex. The cover 16 is held by the instrument body 11 so as to cover the fluorescent lamps 13 and 13 by a plurality of cover attachments 26 attached to the outer edge of the lower surface of the instrument body 11.

  The screw hole 18 is disposed outside the attachment hole 19 on the upper surface of the instrument body 11. A grounding screw 17 electrically connected to a grounding ground terminal (not shown) is screwed into the screw hole 18.

  As shown in FIG. 3, the screw hole 18 forms an insertion hole portion 27 and a peripheral rib 28.

  The insertion hole 27 has an inner diameter D1 at the upper end 29, an inner diameter D2 slightly lower than the inner diameter D1 of the upper end 29, and the lower end 30 from the upper end 29 to the lower end 30. It is formed in a tapered shape so that the inner diameter dimension is gradually reduced.

  The peripheral rib 28 is formed at the outer edge of the insertion hole 27, and the inclination angle θ2 of the outer rising gradient portion 32 is set more gently than the inclination angle θ1 of the inner rising gradient portion 31. . At this time, if both the inner and outer gradients are steep, the peripheral ribs may be broken in sheet metal molding. Therefore, the breaking during molding can be suppressed by changing the inner and outer gradients.

  As shown in FIG. 4, a grounding screw 17 is screwed into the screw hole 18 through a grounding ground terminal (not shown) that is grounded to the ceiling construction surface 1 side through a grounding wire (not shown).

  As the grounding screw 17 is screwed, the complete threaded portion 33 advances from the upper end portion 29 to the lower end portion 30 of the insertion hole portion 27 while the screw is engraved.

At this time, the insertion hole portion 27 of the screw hole 18 is formed in a tapered shape so that the inner diameter dimension gradually decreases from the upper end portion 29 toward the lower end portion 30.
As a result, while the grounding screw 17 is screwed into the screw hole 18, the screw is surely carved while being guided by the tapered shape of the insertion hole portion 27.

The peripheral rib 28 of the screw hole 18 is set more gently on the outer rising gradient portion 32 than on the inner rising gradient portion 31.
As a result, the grounding screw 17 is not guided to the normal position by the peripheral rib 28 of the screw hole 18 and does not fall down with respect to the screw hole 18 and is inserted by the rising gradient portion 31 inside the peripheral rib 28. The holes 27 are automatically positioned and screwed concentrically.

When the grounding screw 17 is screwed into the screw hole 18, the incomplete screw portion 34 is positioned on the peripheral rib 28.
Thereby, the grounding screw 17 does not bring the incomplete screw portion 34 into contact with the insertion hole portion 27.

The peripheral rib 28 has a height dimension L2 that is lower than the height dimension L1 of the protruding portion 20 of the instrument body 11 when the grounding screw 17 is screwed into the screw hole 18. Set.
Thereby, the grounding screw 17 does not contact the ceiling construction surface 1 by the peripheral rib 28.

In the lighting fixture 10 according to the embodiment of the present invention, the insertion hole 27 and the screw hole 18 for inserting the grounding screw 17 arranged on the upper surface of the fixture body 11 and grounded to the ceiling construction surface 1 side, And a peripheral rib 28 formed on the outer edge of the insertion hole 27.
Thereby, when the complete screw portion 33 of the grounding screw 17 is screwed into the insertion hole portion 27, the incomplete screw portion 34 of the grounding screw 17 is positioned on the peripheral rib 28, so that the incomplete screw portion 34 is not brought into contact with the insertion hole 27.
Therefore, the increase in the number of parts can be prevented without increasing the plate thickness of the instrument body 11, and the grounding screw 17 can be securely screwed into the screw hole 18 so that the instrument body 11 is grounded to the ceiling construction surface 1 side. it can.

In the lighting fixture 10 of one embodiment of the present invention, when the fixture main body 11 is directly attached to the ceiling construction surface 1, the protruding portion 20 of the fixture main body 11 contacts the ceiling construction surface 1. At this time, the head 35 of the grounding screw 17 is disposed lower than the height of the protruding portion 20 by the peripheral rib 28 of the screw hole 18.
Thereby, the grounding screw 17 does not contact the ceiling construction surface 1.
Therefore, it can be installed without affecting the ceiling construction surface 1.

In the lighting fixture 10 of one embodiment of the present invention, when the grounding screw 17 is screwed into the screw hole 18, the peripheral rib 28 of the screw hole 18 guides the grounding screw 17 to a normal position.
As a result, the grounding screw 17 that advances while being guided by the peripheral rib 28 does not fall down with respect to the screw hole 18.
Therefore, the grounding screw 17 can be screwed into the screw hole 18 without any trouble such as falling down.

In the lighting fixture 10 of one embodiment of the present invention, the outer rising gradient portion 32 of the peripheral rib 28 of the screw hole 18 is set more gently than the inner rising gradient portion 31.
As a result, the grounding screw 17 is automatically positioned concentrically with the insertion hole 27 by the steep inner rising gradient portion 31.
Therefore, the grounding screw 17 can be securely screwed into the screw hole 18.

In the lighting fixture 10 of one embodiment of the present invention, the insertion hole portion 27 of the screw hole 18 is formed in a tapered shape that gradually decreases in diameter toward the tip.
Thereby, while being screwed into the screw hole 18, the grounding screw 17 is screwed into the insertion hole 27 while being guided in a tapered shape.
Therefore, a screw can be surely carved into the insertion hole 27.

  In addition, the instrument main body 11, the mounting holder 12, the fluorescent lamps 13, 1, the ballast 14, the block cover 15, the cover 16 and the like used in the embodiment are not limited to those illustrated, and can be appropriately changed. .

DESCRIPTION OF SYMBOLS 1 Ceiling construction surface 10 Lighting fixture 11 Appliance main body 13 Fluorescent lamp 14 Ballast 15 Block cover 16 Cover 17 Grounding screw 18 Screw hole 20 Protruding portion 27 Insertion hole portion 28 Circumferential rib 35 Head

Claims (5)

An instrument body that can be mounted directly on the ceiling construction surface;
A ballast attached to the appliance body for supplying power to the fluorescent lamp;
A block cover that also serves as a charging part protection covering the appliance body and the ballast;
A fluorescent lamp held on the lower surface of the block cover;
A translucent cover covering the lower surface of the instrument body including the fluorescent lamp;
A screw hole for screwing a grounding screw disposed on the upper surface of the instrument body and grounded to the ceiling construction surface side;
A lighting fixture comprising:
The said screw hole formed the penetration hole part and the surrounding rib formed in the outer edge of the said penetration hole part, The lighting fixture characterized by the above-mentioned.   The circumferential rib of the screw hole is arranged such that, in a state where the grounding screw is screwed in, a head portion of the grounding screw that is lower than a height of a projecting portion that contacts the ceiling construction surface of the instrument body is arranged. The lighting fixture according to claim 1.   The lighting apparatus according to claim 1, wherein the peripheral rib of the screw hole is capable of guiding the grounding screw to a normal position.   The lighting apparatus according to any one of claims 1 to 3, wherein the peripheral rib of the screw hole is set to have a gentler outer rising gradient than an inner rising gradient.   The lighting apparatus according to any one of claims 1 to 4, wherein the insertion hole portion of the screw hole is formed so that an inner diameter thereof is gradually reduced toward the tip.

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