JPH08249915A - Luminaire - Google Patents

Abstract

PURPOSE: To provide a luminaire in which unnatural force is prevented from being applied to a lamp socket even if unnatural fastening force is applied to a holder nut in a normal installation state of a flange. CONSTITUTION: A lamp socket 2 installed in a ceiling, a flange 3 which is a matter to cover the lamp socket 2 and form a gap between the upper end and the ceiling 6 while a contact piece 16 being brought into contact with a flange contact face 14, and a holder nut 4 having a female screw 18 fitted with a male screw 12 by screwing to support the flange 3 are installed in a luminaire. The contact piece 16 is so formed into a shape as to be detached from the flange contact face 14 by revolution of the flange 3 and at the same time an elastic claw part 17 to guide the side face 9a of a projected part 9 in the case a hole part 15 of the flange 3 is inserted into the lamp socket 2 is formed in the flange 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting fixture.

[0002]

2. Description of the Related Art A conventional example is shown in FIGS. That is, this luminaire has a rectangular hook ceiling 70 attached to the ceiling 80, and a square ceiling cap portion 72 having a hook plug blade 71 hooked and connected to the hook ceiling 70 on the upper surface. Sealing cap 72
An opening 74 is formed at the lower end so that the lamp 73 can be removably mounted by hanging from the center of the lower surface of the
5, a hook sealing socket 77 having a socket portion 75 and a hole 78 through which the hook sealing socket 77 can be inserted, and an abutment piece 79 abutting against a flange abutment surface 72a which is a lower surface of the sealing cap portion 72. Is provided in the hole portion 78 to cover the hook sealing 70 and the hook sealing socket 77, and the abutting piece 79 is the flange abutting surface 7 of the sealing cap portion 72.
2a, a gap 81 is formed between the upper end and the ceiling 80.
And a holder nut 8 for supporting the flange 82 by having a flange 82 that forms the
4 and. Reference numeral 85 is a glove, the inner flange of the upper end of which abuts the lower surface of the flange 82, and the holder nut 84 inserted in the glove 85 supports the lower surface of the inner brim of the upper end of the flange 82. Reference numeral 86 denotes a lock release button, which engages with the hooking blade 70 of the hooking hole 70a to which the hooking blade 71 is hooked to insert the locking projection to prevent the lamp socket 77 from being accidentally detached.

In this luminaire, if the upper end of the flange 82 is pressed against the ceiling 80, the flange 82 is attached to the ceiling 8 due to over-tightening of the holder nut 84.
0, and the repulsive force acts to pull down the hook ceiling socket 77 from the ceiling 80, and an abnormal force greater than the weight of the device is applied downward to the hook ceiling socket 77. Therefore, the hook plug blade 71 and the hook seal 70 There is a risk that the receiving edge of the hook may be deformed, the hook ceiling 70 may be broken, or the hook ceiling socket 77 may drop. Therefore, the flange 82 is dimensioned so that a gap 81 is provided between the ceiling 80 and the upper end of the flange 82 in the mounted state where the contact piece 79 of the flange 82 is in contact with the flange contact surface 72a of the sealing cap portion 72. It is set. When the flange 82 is rotated, the lock release button 8
As shown in FIGS. 8 and 9, a flange 82 is provided so that the hook ceiling socket 77 does not come off when the hook 6 is pushed.
The inner surface 82a of the above is applied to the shoulder portion of the sealing cap portion 72 so as not to rotate.

[0004]

However, in this lighting device, it is impossible to tighten the holder nut 84 to support the flange 82 in a normally mounted state, and then to apply an even larger force to the holder nut 84 to tighten it too much. When a force is applied to the holder nut 84, the flange 82 rotates together, the hook sealing socket 77 is rotated, and further the rotary force is applied to the hook ceiling 70 via the hook blade 71, which may damage them.

Such a problem is not limited to the case where the hook ceiling socket 77 is connected to the hook ceiling 70, and the case where a lamp socket having a male screw on the outer circumference is directly attached to the ceiling without the hook ceiling 70. there were. Therefore, an object of the present invention is to provide a luminaire that does not apply an unreasonable force to a lamp socket or the like even if an unreasonable tightening force is applied to a holder nut in a normally mounted state of a flange.

[0006]

The luminaire of the present invention comprises:
A lamp socket mounted on the ceiling and having a male screw on the outer periphery and a radial protrusion on the upper end side of the male screw and the lower surface of the protrusion serving as a flange contact surface, and inserting the lamp socket. An abutting piece having a possible hole portion and abutting against the flange abutting surface is provided in the hole portion to cover the lamp socket, and the abutting piece abuts the flange abutting surface. A flange whose upper end forms a gap with the ceiling in a state, and a holder nut that has a female screw threaded to the male screw to support the flange, and the abutting piece is a predetermined angle of the flange. Is formed so as to be detachable from the flange abutting surface by rotation exceeding 1, and the abutting piece abuts the flange abutting surface when the hole portion of the flange is inserted into the lamp socket. As described above, an elastic claw portion that elastically deforms by hitting the side surface of the protrusion when the flange co-rotates due to over-tightening of the holder nut is provided in the hole of the flange. It is a feature.

[0007]

According to the structure of the present invention, the flange is passed through the lamp socket, and the holder nut is screwed onto the male screw to support the flange through the globe or directly without the globe. It contacts the flange contact surface of the protrusion. As a result, the flange is in an attached state with a gap between the upper end and the ceiling.

In this case, since the abutment piece is formed so as to be detachable from the lower surface of the projecting portion by the rotation of the flange, if the flange co-rotates due to over-tightening of the holder nut, the abutment piece of the flange will contact the flange abutment surface. Since it comes off, the turning force is not applied to the lamp socket. It also guides the side surface of the protrusion so that the abutment piece abuts the flange abutment surface when the hole in the flange is inserted into the lamp socket, and when the flange co-rotates due to over-tightening of the holder nut, Since the elastic claw that elastically deforms by hitting the side surface is provided inside the hole of the flange, the abutting piece of the flange can easily and accurately abut the flange abutting surface of the lamp socket when the flange is covered with the lamp socket, and the holder Even if the flange rotates due to over-tightening of the nut, the elastic claw portion elastically deforms when it hits the side surface of the lamp socket, so that the operation of the contact piece coming off the flange contact surface is not hindered.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. That is, this lighting fixture has a hook ceiling 1, a lamp socket 2, a flange 3, a holder nut 4, and a globe 5. The hook ceiling 1 is
It is prismatic and is attached to the ceiling 6, and has a substantially arcuate hooking hole 8 formed in the lower surface, and a receiving blade (not shown) is provided therein.

The lamp socket 2 has a male screw 12 on its outer circumference, and a radial protrusion 9 on the upper end side of the male screw 12,
The lower surface of the projecting portion 9 serves as a flange contact surface 14 and is attached to the ceiling 6. The lamp socket 2 of the embodiment is a hook sealing socket in which a protrusion 9 is hooked and connected to the hook ceiling 1 and a hook sealing blade 7 is provided on the upper surface to form a rectangular sealing cap portion. The protrusion 9 is a locking protrusion (not shown) that restricts the protrusion 9 from rotating in the opposite direction when the hook blade 7 is inserted into the hook hole 8 and rotates in one direction to be locked by the receiving blade. Is urged so as to be fitted to the hooking blade insertion position of the hooking hole 8, and the lock projection is hooked on the side surface of the protruding portion 9 which is the front surface in the direction co-rotating with the rotation direction of the holder nut 4. A lock release button 25 for protruding the hole 8 is provided. Therefore, when the hook plug blade 7 of the lamp socket 2 is inserted into the hook hole 8 and is rotated and locked to the receiving blade, the lock release button 25
When the lock projection is pushed down, the lock projection is locked in the catch hole 8 when the lock release button 25 is released while the lock socket is locked to the receiving blade, and the lamp socket 2 is locked in the direction in which it is accidentally removed. It is possible to prevent it from rotating in the direction opposite to the rotating direction and coming off the hook ceiling 1. When the lamp socket 2 is to be removed, the lock release button 25 is pressed to retract the lock protrusion. Further, in the lamp socket 2, the cylindrical portion 13 hangs down from the center of the flange abutting surface 14 of the protruding portion 9, and the opening 11 for detachably mounting the lamp 10 is formed at the lower end.

The flange 3 has a hole portion 15 through which the lamp socket 2 can be inserted, and an abutting piece 16 that abuts the flange abutting surface 14 in the hole portion 15, so that the lamp socket 2 and the hooking ceiling 1 are provided. The upper end forms a gap δ with the ceiling 6 in a state where the contact piece 16 contacts the flange contact surface 14. As shown in FIG. 2, the flange 3 of the embodiment is formed by continuously forming a large-diameter portion 3a on the ceiling side and a small-diameter portion 3b on the lower end, and an inner cylinder connected to the inner surface of the small-diameter portion 3b at the lower end of the small-diameter portion 3b. The portion 20 is formed, and the inside of the inner tubular portion 20 is used as the hole portion 15. The gap δ is set to about 0.6 mm.

The contact piece 16 is formed in such a shape that it can be removed from the flange contact surface 14 by rotation of the flange 3 beyond a predetermined angle, and when the hole 15 of the flange 3 is inserted into the lamp socket 2. The side surface of the projecting portion 9 is guided so that the contact piece 16 contacts the flange contact surface 14, and the flange 3 is tightened by over-tightening the holder nut 4.
An elastic claw portion 17 that is elastically deformed by hitting the side surface of the protruding portion 9 when co-rotating is provided in the hole portion 15 of the flange 3. As shown in FIG. 3, a pair of contact pieces 16 of the embodiment are provided so as to face each other in a diametrical direction of an axially intermediate portion of the inner tubular portion 20, and each contact piece 16 has a hypotenuse side 16a and a vertical side. 16b has a substantially right-angled triangle projecting from the top, and the hypotenuse 16a
Are arranged so as to be symmetrical with each other, and when the flange 3 rotates in the direction in which the flange 3 rotates with the holder nut 4 as shown in FIG.
Are separated from the lower surface 14. In addition, the inner tube portion 2
A pair of projecting pieces 21 in the form of a flat plate project in a diameter direction perpendicular to one diameter direction of the inner end portion of 0, and are bent toward the holder nut 4 side at the tip edge thereof in parallel with the vertical side 16b of the contact piece 16. The bent portion 22 is formed, the elastic claw portion 17 is extended from the bent portion 22 in the direction toward the top of the vertical side 16b, and the contact piece 16 contacts the flange contact surface 14 as shown in FIG. When the flange 3 co-rotates with the side surface 9a of the protruding portion 9, the tip of the elastic claw portion 17 hits the side surface 9a of the protruding portion 9 and elastically deforms as shown in FIG.

The holder nut 4 has a female screw 18 that is screwed into the male screw 12 to support the flange 3. Glove 1
9 has a hole 24 through which the lamp socket 2 can be inserted, and the upper surface of the hole edge abuts the lower surface of the flange 3 and the holder nut 4 abuts the lower surface of the hole edge of the hole 24 of the globe 19. To support the flange 3.

According to this embodiment, the flange 3 is passed through the lamp socket 2, and the holder nut 4 is screwed onto the male screw 12 with or without the globe 19 to support the flange 3. Abutment piece 16 of flange 3
Is brought into contact with the flange contact surface 14 of the protruding portion 9. As a result, the flange 3 is in an attached state with a gap δ between the upper end and the ceiling 6.

In this case, since the contact piece 16 is formed so as to be detachable from the lower surface of the projecting portion 9 by the rotation of the flange 3, if the flange 3 co-rotates due to over-tightening of the holder nut 4, as shown in FIG. Since the contact piece 16 of the flange 3 is disengaged from the flange contact surface 14 as in (a) to (b), an unreasonable rotational force is not applied to the lamp socket 2 and the hook ceiling 1. Further, when the hole 15 of the flange 3 is inserted into the lamp socket 2, the side surface of the protrusion 9 is guided so that the contact piece 16 contacts the flange contact surface 14, and the flange 3 is tightened by over-tightening the holder nut 4. Since the flange 3 is provided with the elastic claw portion 17 that elastically deforms by hitting the side surface of the protruding portion 9 when co-rotating, when the flange 3 is covered with the lamp socket 2, the contact piece 1 of the flange 3 is formed.
6 can easily and accurately abut the flange abutting surface 14 of the lamp socket 2, and even if the flange 3 rotates due to over-tightening of the holder nut 4, the elastic claw portion 17 elastically deforms when it hits the side surface of the lamp socket 2. So contact piece 16
Does not hinder the movement of the blade from the flange contact surface 14.

The lamp socket 2 described above is hooked on the hook ceiling 1, but the present invention can be applied not to the hook ceiling 1 but directly to the ceiling.

[0017]

According to the luminaire of the present invention, since the contact piece is formed so as to be detachable from the lower surface of the projecting portion by the rotation of the flange, when the holder nut is over-tightened and the flange is rotated together, the contact piece of the flange is removed. Is removed from the flange contact surface, so an unreasonable rotational force is not applied to the lamp socket. It also guides the side surface of the protrusion so that the abutment piece abuts the flange abutment surface when the hole in the flange is inserted into the lamp socket, and when the flange co-rotates due to over-tightening of the holder nut, Since the elastic claw that elastically deforms by hitting the side surface is provided inside the hole of the flange, the abutting piece of the flange can easily and accurately abut the flange abutting surface of the lamp socket when the flange is covered with the lamp socket, and the holder Even if the flange rotates due to over-tightening of the nut, the elastic claw portion elastically deforms when it hits the side surface of the lamp socket, so that there is an effect that the operation of the contact piece coming off the flange contact surface is not hindered.

[Brief description of drawings]

FIG. 1 is a partially cutaway exploded perspective view of an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the lamp socket connected to a hook ceiling.

FIG. 3 is a bottom view of the flange that covers the lamp socket, as viewed from the lower surface.

FIG. 4 is a bottom view of a state in which the flange is co-rotated by over-tightening the holder nut.

FIG. 5 is a cross-sectional view showing a co-rotating state of the flange due to over-tightening of the holder nut.

FIG. 6 is an exploded perspective view of a conventional example.

FIG. 7 is a cross-sectional view of the flange.

FIG. 8 is a longitudinal sectional view thereof.

FIG. 9 is a bottom view of the flange.

[Explanation of symbols]

 1 Hooking Ceiling 2 Lamp Socket 3 Flange 4 Holder Nut 6 Ceiling 7 Hooking Plug Blade 9 Projection 10 Lamp 11 Opening 12 Male Thread 14 Flange Abutment Surface 15 Hole 16 Abutment Piece 17 Elastic Claw 18 Female Thread

Claims (1)

[Claims] 1. A lamp socket mounted on a ceiling, which has a male screw on its outer circumference, has a radial protrusion on the upper end side of the male screw, and has a lower surface of the protrusion as a flange contact surface, which is mounted on a ceiling. A contact piece that has a hole through which the lamp socket can be inserted and that contacts the flange contact surface is provided in the hole to cover the lamp socket, and the contact piece is the flange contact. A flange having an upper end forming a gap between the ceiling and the ceiling in a state of being in contact with a surface; and a holder nut having a female screw threaded to the male screw to support the flange, the abutting piece comprising: The flange is formed into a shape that can be detached from the flange contact surface by rotation exceeding a predetermined angle, and the contact piece has the flange when the hole of the flange is inserted into the lamp socket. In the hole of the flange, an elastic claw portion that guides the side surface of the protrusion so as to abut the contact surface and elastically deforms by hitting the side surface of the protrusion when the flange co-rotates due to over-tightening of the holder nut A lighting fixture characterized by being provided in.