JPH08161924A - Luminaire - Google Patents

Abstract

PURPOSE: To prevent the damage of a lamp socket or a hook ceiling by specifying an inclination angle of the peripheral surface of a retaining cylinder portion against its center axis so as not to apply large tensil force resulting from fastening a holder nut excessively. CONSTITUTION: A holder nut 3 is equipped with a cylindrical female screw portion 10 screwing to a male screw portion 4, and a retaining cylinder portion 11 one end of which is continuously set to one end of the female screw 10, the other end of which is expanded in its diameter toward the other end of the female screw portion 10, and the peripheral surface of which is inclined against its center axis. Flange 2 is retained by the other end of the retaining cylinder portion 11, and the inclination angle of the retaining cylinder portion 11 against the center axis of the female screw portion 10 is set to about 40 degrees. Thereby, since excessive fastening torque is hardly applied to the flange 2 when the holder nut 3 is fastened, there is no chance of damaging a lamp socket or a hook ceiling, resulting from excessive fastening.

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 first conventional example is shown in FIG. That is, in this lighting apparatus, the hook ceiling body 70 attached to the ceiling is attached to the ceiling with wood screws 71, and the lamp socket 73 with the blade 72 is connected to the hook ceiling body 70. 74 is a globe supported by the lamp socket 73, and 75 is an incandescent lamp mounted in the lamp socket 73.

A second conventional example is shown in FIG. That is,
In this luminaire, a socket base 77 having a lamp socket 73 having a male screw portion 76 for a holder provided on the outer surface is attached to a ceiling, and a flange 78 is passed through the lamp socket 73.
A holder nut 79 is screwed onto the male screw portion 76 for holder to fix the flange 78 to the ceiling. 80 is a terminal block.

FIG. 1 shows a third conventional example (Actual No. 57-6813).
It is shown in FIG. That is, in this luminaire, the globe 74 is passed through the lamp socket 73 having the male screw portion 76 attached to the ceiling, and the holder nut 79 having the female screw portion 81 and the pressing cylinder portion 82 is attached to the male screw portion 76 on the globe 74. It supports the globe 74.

[0005]

However, in the first conventional example, only the globe 74 is placed on the lamp socket 73 by the lamp socket 73, and the hook ceiling body 70 has a weight other than the weight of the lamp socket 73 and the like. However, since the hanging sealing body 70 is visible from the outside, the external appearance is poor, and the globe 74 is easily moved, so that the lamp socket 73 is not easily attached and detached.

In the second conventional example, when the holder nut 79 is tightened to the male screw portion 76 of the lamp socket 73, the flange 78 hits the ceiling. Therefore, excessive tightening causes an excessive force other than the weight of the lamp socket or the like on the socket base 77. Join. In the third conventional example, since the holder nut 79 has a shape that allows easy rotation, when the globe 74 is fixed in addition to the weight of the globe 74, an excessive tensile force is applied to the mounting portion of the lamp socket 76, which causes the holder nut 79 to be directly mounted on the ceiling. In this case, excessive tensile force is applied to the wood screw and to the wood screw and the blade in the case of a wiring device such as a hook ceiling, which causes damage to the lamp socket and the wiring device.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a luminaire capable of preventing a large tensile force from being applied to the mounting side of a lamp socket by over-tightening a holder nut.

[0008]

The luminaire according to claim 1 comprises:
A lamp socket having a male screw portion on the outer peripheral surface and attached to a ceiling, a flange having an insertion hole inserted into the lamp socket and having an outer peripheral edge abutting the ceiling surface, and a cylinder screwed to the male screw portion Has a female threaded portion in the shape of a ring, one end of which is connected to one end of the female threaded portion, the other end of which has a diameter increasing toward the other end of the female threaded portion, and the outer peripheral surface of which has a pressing cylinder portion which is inclined with respect to the central axis. And a holder nut that presses the flange at the other end of the pressing cylinder portion, and the inclination angle of the outer peripheral surface of the pressing cylinder portion with respect to the central axis is approximately 40 degrees or more.

According to a second aspect of the present invention, in the first aspect of the present invention, the outer peripheral surface of the pressing cylinder portion is a concave curved surface. According to a third aspect of the present invention, in the first aspect, the holder nut is made of resin, and a metal donut-shaped reinforcing member is fitted between the female screw portion and the pressing tube portion.

According to a fourth aspect of the present invention, in the lighting fixture according to the first aspect, the holder nut is made of resin, and the female screw portion is provided with a metal reinforcing plate having a hole portion that is screwed into the male screw portion. Is. According to a fifth aspect of the present invention, in the first aspect, the holder nut has a heat radiating portion.

According to a sixth aspect of the present invention, in the fifth aspect, the heat radiating portion is a notch formed at an end portion of the pressing tube portion on the flange side.

[0012]

According to the luminaire of claim 1, the holder nut is screwed into the male screw portion through the flange alone or the flange and the shade and the like to the lamp socket mounted on the ceiling or the like, and the pressing cylinder portion is pushed onto the flange or the like. Fix the upper end by pressing it against the ceiling. In this case, one end of the holder tube of the holder nut is connected to one end of the female threaded portion, the other end expands toward the other end of the female threaded portion, and the outer peripheral surface inclines with respect to the central axis. Angle about 4 to the center axis
Since it is set to 0 degree or more, it is difficult to operate by holding the outer peripheral surface of the pressing cylinder part. Therefore, when tightening the holder nut, it is difficult to apply an excessive tightening torque to the flange, so there is a risk of damaging the lamp socket or the hook ceiling by over tightening. Absent.

According to the lighting fixture of claim 2, since the outer peripheral surface of the pressing cylinder portion is a concave curved surface in claim 1, there is no projection for a finger, and therefore, the same as in claim 1. It has an effect. According to the lighting fixture of claim 3, in claim 1, the holder nut is made of resin, and a metal donut-shaped reinforcing member is fitted between the female screw portion and the pressing tube portion. In addition to the action of claim 1, even if the outer peripheral portion of the holder nut is cracked,
Since the reinforcing member supports the flange or shade, the flange does not drop.

According to a fourth aspect of the present invention, in the first aspect, the holder nut is made of resin, and a metallic reinforcing plate having a hole to be screwed into the male screw portion is provided on the female screw portion. Therefore, in addition to the effect of the first aspect, even if the female screw portion is broken, the portion where the reinforcing plate is screwed is not broken, so that the flange or the shade is not dropped. According to the lighting equipment of claim 5, in claim 1, since the holder nut has a heat radiating portion, in addition to the function of claim 1, heat can be radiated by convection through the heat radiating portion. It is possible to reduce the temperature rise near the nut, and it is easy to turn because the fingers can be caught at the beginning of turning the holder nut.

According to the lighting equipment of claim 6, in claim 5, since the heat dissipation portion is a notch formed at the flange side end portion of the pressing cylinder portion, in addition to the function of claim 5,
When rotating with a shade or the like, since the frictional force between the holder nut and the shade or the like is small, the holder nut does not rotate together, and it is possible to reduce the risk of cracking of the holder nut or damage to wiring equipment.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS. That is, this lighting fixture has a lamp socket 1, a flange 2, and a holder nut 3. The lamp socket 1 is attached to a ceiling or the like and has a male screw portion 4 formed on the outer peripheral surface. The lamp socket 1 of the embodiment includes a screw-in socket portion 5 into which a base having an external thread such as an incandescent light bulb 12 is screwed, and a flange portion 6 provided at the rear end of the screw-in socket portion 5 and having a diameter larger than that of the screw-in socket portion 5. The collar portion 6 is provided with a plug blade 7 that is connected to a receiving blade (not shown) of a ceiling ceiling ceiling ceiling. Therefore, when the stopper blade 7 of the lamp socket 1 is connected to the catch blade of the hook ceiling, the lamp socket 1
Is electrically and mechanically connected to the ceiling.

The flange 2 has an insertion hole 8 which is inserted into the lamp socket 1, and an outer peripheral edge 9 thereof contacts the ceiling surface. This flange 2 is a hook ceiling and a lamp socket 1.
Cover the upper end of the. The holder nut 3 has a male thread 4
Has a cylindrical female screw portion 10 that is screwed into
0 has one end connected to one end, the other end increases in diameter toward the other end of the female threaded portion 10, and the outer peripheral surface has a holding cylinder portion 11 inclined with respect to the central axis. Although the flange 2 is pressed at the other end, the inclination angle of the pressing tube portion 11 with respect to the central axis of the female screw portion 10 is approximately 40 degrees or more.

Holding cylinder portion 1 of holder nut 3 of the embodiment
2, the tilt angle Φ ₁ with respect to the central axis on the lower end side is about 45 degrees, and the tilt angle is about 40 degrees on the upper end side. Further, the outer peripheral surface of the pressing cylinder portion 11 is a concave curved surface 14. The holder nut 3 is made of resin, and a metal donut-shaped reinforcing member 15 is fitted between the female screw portion 10 and the pressing cylinder portion 11 and screwed into a screw hole 19 formed in the holder nut 3 with a fixing screw 16. It is fixed. Further, the heat radiating portion 18 is provided by forming a notch in the flange side end portion 17 of the pressing cylinder portion 11. The reinforcing member 15 is located inward of the heat radiating portion 18.

Further, in the embodiment, the shade 13 is supported by the flange side end portion 17 of the pressing cylinder portion 11, and the shade 13 is supported.
The flange 2 is pressed and fixed via. According to this embodiment, the holder nut 3 is screwed into the male screw portion 4 by passing only the flange 2 or the flange 2 and the shade 13 into the lamp socket 1 mounted on the ceiling or the like, and the pressing cylinder portion 11 is inserted.
Is pressed against the flange 2 or the like to press and fix the upper end of the flange 2 against the ceiling or the like.

In this case, one end of the holding cylinder portion 11 of the holder nut 3 is connected to one end of the female screw portion 10 and the other end thereof expands in diameter toward the other end of the female screw portion 10 and the outer peripheral surface thereof with respect to the central axis. And the tilt angle is about 4 with respect to the central axis.
Since it is set to 0 degrees or more, it is difficult to operate by grasping the outer peripheral surface of the pressing cylinder portion 11, and therefore, when tightening the holder nut 3, it is difficult to apply an excessive tightening torque to the flange 2. There is no risk of damage. Specifically, no abnormal force is applied to the blade 7 or the wood screw for attaching the hooking ceiling, which prevents the wiring device from being damaged. No damage is applied to the shade 13 which is usually made of glass or plastic, and the holder nut 3 itself made of resin is prevented from being damaged.

Further, since the metal donut-shaped reinforcing member 15 is fitted between the female screw portion 10 and the pressing cylinder portion 11 of the resin holder nut 3, the outer peripheral portion of the holder nut 3 may be cracked. However, since the reinforcing member 15 supports the flange 2 or the shade 13, the flange 2 and the like do not drop. Further, since the holder nut 3 has the heat radiating portion 18, it is possible to radiate heat by convection through the heat radiating portion 18, so that the temperature rise near the lamp cap and the holder nut 3 can be suppressed, and the turning of the holder nut 3 can be performed. It is easy to turn because you can hook your finger at the beginning. In particular, the heat radiating portion 18 is pressed and the flange side end portion 17 of the tubular portion 11 is
Due to the notch formed in the case, when rotating with the shade 13 etc., the frictional force between the holder nut 3 and the shade 13 etc. is small, so the holder nut 3 will not rotate together and the holder nut 3 will crack and the wiring equipment will be damaged. It is possible to reduce the danger such as.

A second embodiment of the present invention is shown in FIG. That is, in this luminaire, the donut-shaped reinforcing member 15 of the holder nut 3 having no heat radiating portion 18 is attached to the end portion 17 on the flange side.
It is fitted at a position further down than the flange side end portion 17 so that it cannot be seen from the end face of the. The doughnut-shaped reinforcing member 15 of the embodiment is formed in a disc shape, and the outer diameter is about the inner diameter of the upper end portion of the holding cylinder portion 11 and the inner diameter is about the outer diameter of the female screw portion 10. Further, the outer diameter of the doughnut-shaped reinforcing member 15 is formed larger than the inner diameter of the lamp socket insertion portion 13a of the shade 13. Others are the same as those in the first embodiment.

According to this embodiment, even if the female screw portion 10 of the holder nut 3 is damaged, the doughnut-shaped reinforcing member 1
Only the part where the central hole of 5 is in contact does not shatter and thus the fall of the shade 13 can be prevented. Even if the flange-side end portion 17 of the holder nut 3 is damaged, the doughnut-shaped reinforcing member 15 has an outer diameter larger than the inner diameter of the socket insertion portion 13a of the shade 13, so that the shade 13 can be prevented from falling.

A third embodiment of the present invention is shown in FIG. That is, this luminaire includes the reinforcing member 15 of the first embodiment.
Instead, a metal reinforcing plate 20 having a hole portion 21 to be screwed into the male screw portion 4 is provided on the female screw portion 10 of the holder nut 3 having no heat radiating portion 18. In the embodiment, the female screw portion 10
The reinforcing plate 20 is attached to the end surface of the lamp, the outer diameter is larger than the lamp socket insertion portion 13a of the shade 13,
Is smaller than. Others are the same as those in the first embodiment.

According to this embodiment, even if the female screw portion 10 is broken, the portion where the reinforcing plate 20 is screwed is not broken, so that the flange 3 or the shade 13 does not drop. Further, even when both the female screw portion 10 and the flange side end portion 17 of the holder nut 3 are damaged, the reinforcing plate 20 is screwed with the lamp socket 1, so that the reinforcing plate 20 does not drop and the shade 13 You can prevent it from falling. Other, reinforcing member 15
In addition to the above function, the same function and effect as those of the first embodiment are obtained.

A fourth embodiment of the present invention is shown in FIGS. 6 and 7.
Shown in That is, in this luminaire, in the first embodiment, a pair of protrusions 6'are formed on both sides of the rear end of the screw-in socket 5 of the lamp socket 1, and the protrusions 6'are formed.
On the rear end face side of the lamp socket 1, a plug blade 7 connected to the receiving blade of the hooking ceiling 22 is provided. The flange 3 has an insertion hole 8 that fits in a shape including the protrusion 6 ′ on the rear end surface of the lamp socket 1, and the outer peripheral edge 9 abuts on the ceiling in a state of being fitted in the insertion hole 8. Also, the holder nut 3 is shown in FIG.
As shown in FIG. 4, the outer peripheral surface is formed into a convex curved surface, the flange side end portion 17 is formed into an outer brim shape, and
Are formed by a large number of holes. Other configurations and operational effects are similar to those of the first embodiment.

FIG. 8 shows a modification of the holder nut 3 of the fourth embodiment, in which the heat radiating portion 18 is a vertical hole. In FIG. 9, a heat radiating portion 18 is formed by notching on an outer flange-shaped flange-side end portion 17 of the holder nut 3. This lighting fixture uses a lamp socket that has a plug blade that is connected to the receiving blade of the hook ceiling body.However, even if the socket base is directly attached to the ceiling, etc. It is applicable because excessive force is applied due to over-tightening. In addition to the shade 13, a light distribution control member such as a glove can be fixed by the holder nut 3.

[0028]

According to the luminaire of the first aspect, one end of the holding cylinder portion of the holder nut is connected to one end of the female screw portion, and the other end is expanded toward the other end of the female screw portion and the outer circumference thereof is increased. Since the surface is inclined with respect to the central axis and the inclination angle is set to about 40 degrees or more with respect to the central axis, it is difficult to operate by gripping the outer peripheral surface of the pressing cylinder portion, and therefore excessive tightening torque when tightening the holder nut. Since it is hard to add to the flange, there is an effect that there is no risk of damaging the lamp socket or the hook ceiling by over-tightening.

According to the lighting fixture of claim 2, since the outer peripheral surface of the pressing cylinder portion is a concave curved surface in claim 1, there is no projection for a finger to catch, and therefore the same as in claim 1. effective. According to the lighting fixture of claim 3, in claim 1, the holder nut is made of resin, and a metal donut-shaped reinforcing member is fitted between the female screw portion and the pressing tube portion. In addition to the effect of claim 1, even if the outer peripheral portion of the holder nut is cracked,
Since the reinforcing member supports the flange or shade, the flange does not drop.

According to a fourth aspect of the present invention, there is provided the luminaire according to the first aspect, wherein the holder nut is made of resin, and a metal reinforcing plate having a hole portion that is screwed into the male screw portion is provided in the female screw portion. Therefore, in addition to the effect of the first aspect, even if the female screw portion is broken, the portion where the reinforcing plate is screwed is not broken, so that the flange or the shade does not drop. According to the luminaire of claim 5, in addition to the effect of claim 1, since the holder nut has the heat radiating portion in claim 1, heat can be radiated by convection through the heat radiating portion. It is possible to reduce the temperature rise near the nut, and it is easy to turn because the fingers can be caught at the beginning of turning the holder nut.

According to the lighting equipment of claim 6, in addition to the effect of claim 5, since the heat dissipation part is a notch formed at the flange side end of the pressing cylinder part in claim 5,
When rotating with a shade or the like, since the frictional force between the holder nut and the shade or the like is small, the holder nut does not rotate together, and it is possible to reduce the risk of cracking of the holder nut or damage to wiring equipment.

[Brief description of drawings]

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

FIG. 2 is a half sectional side view of the holder nut.

FIG. 3 is a plan view of a holder nut.

FIG. 4 is a sectional view of a second embodiment.

FIG. 5 is a sectional view of a third embodiment.

FIG. 6 is an exploded perspective view of a fourth embodiment.

FIG. 7 is a side view of the holder nut.

FIG. 8 is a side view of a holder nut of the modified example.

FIG. 9 is a perspective view of a holder nut of another modified example.

FIG. 10 is an exploded perspective view of a first conventional example.

FIG. 11 is an exploded perspective view of a second conventional example.

FIG. 12 is a sectional view of a third conventional example.

[Explanation of symbols]

 1 Lamp Socket 2 Flange 3 Holder Nut 4 Male Thread 8 Insertion Hole 9 Outer Edge 10 Female Thread 11 Holding Tube

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Yoshie Sakuma 1048, Kadoma, Kadoma, Osaka Prefecture Matsushita Electric Works, Ltd.

Claims (6)

[Claims] 1. A lamp socket having a male screw portion on the outer peripheral surface and attached to a ceiling or the like, a flange having an insertion hole inserted into the lamp socket and having an outer peripheral edge abutting the ceiling surface, and the male screw portion. A cylindrical female threaded portion that is screwed into the one end of the female threaded portion, one end of which is continuously connected to the other end of the female threaded portion, the other end of which is enlarged toward the other end of the female threaded portion and the outer peripheral surface of which is inclined with respect to the central axis A lighting fixture having a holder nut that has a tubular portion and presses the flange at the other end of the pressing tubular portion, and an inclination angle of the outer peripheral surface of the pressing tubular portion with respect to the central axis is approximately 40 degrees or more. 2. The luminaire according to claim 1, wherein the outer peripheral surface of the pressing tube portion has a concave curved surface. 3. The luminaire according to claim 1, wherein the holder nut is made of resin, and a metal donut-shaped reinforcing member is fitted between the female screw portion and the pressing cylinder portion. 4. The luminaire according to claim 1, wherein the holder nut is made of resin, and a metal reinforcing plate having a hole to be screwed into the male screw portion is provided on the female screw portion. 5. The luminaire according to claim 1, wherein the holder nut has a heat dissipation portion. 6. The luminaire according to claim 5, wherein the heat radiating portion is a notch formed at an end portion of the pressing tube portion on the flange side.