JP2000348526A - Luminaire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a luminaire capable of preventing from staggering and coping satisfactorily gap formation errors between the ceiling surface and the oversurface of the top plate of luminaire body. SOLUTION: A luminaire 3 is configured, so that its body 5 is mounted with a certain gap D to a ceiling surface 1 by a wiring apparatus 2 installed on the ceiling surface 1, includes a pull switch mounted on the luminaire body 5, which is operated by a pull cord with the heading changed downward by an arm 7 protruding sideways which are approx. alongside the top plate 5a of the luminaire body, and is furnished with an stagger preventing tool 4 located between the ceiling surface 1 on that side of the luminaire body 5 approaching the ceiling surface 1 with application of the pull switch operating force to the pull cord and the oversurface of the top plate 5a of the luminaire body and prevents the luminaire body 5 from approaching the ceiling surface 1. Accordingly, there is no risk that the luminaire 3 becomes unstaggering, when the pull switch is operated nor will the operator have a sense of discomfort. This leads to preventing degradation of the strength resulting from repetitive load application to the ceiling mounting part of the luminaire caused by the luminaire 3 staggering.

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 Conventionally, as disclosed in, for example, Japanese Patent Application Laid-Open No. 9-213123, a lighting fixture which prevents rattling of the fixture by interposing an elastic packing between the fixture body and a ceiling surface. There is. Also, JP-A-10-16263
Japanese Patent Application Laid-Open No. 2000-139,086 discloses a configuration in which a pull switch provided on an instrument main body is operated by a pull switch pull cord that changes its direction downward by an arm protruding sideways substantially along the instrument main body top plate.

[0003] If the pull switch provided on the instrument body is not operated by a drawstring that is turned downward by an arm protruding sideways substantially along the instrument body top plate,
There are the following issues.

In order to secure the amount of light from the instrument body to the side,
When the glove is shaped to cover the side surface of the device main body, a load received by the pull switch pull cord to change its direction downward is applied to the glove, and the glove is particularly thin because it allows light to pass through. Therefore, the glove may be broken. As a countermeasure, if the glove is provided with a through hole for passing a pull switch pull cord, and the pull switch pull cord is passed through the through hole of the glove and pulled out from under the instrument body, if the pull switch tip of the pull switch is pulled diagonally To
A load is applied around the through hole. The globe is thin to allow the passage of lamp light. For this reason, the glove may be broken. In order to prevent the glove from being damaged, it is necessary to increase the strength.

When the glove is rotationally mounted, the glove is rotated and mounted while the pull switch pull cord penetrates the glove. Therefore, the glove is difficult to mount because the through hole of the pull switch pull cord moves in accordance with the rotary mounting operation.
Further, since the pull switch pull cord freely moves between the glove and the instrument main body, there is a possibility that the pull switch pull cord becomes entangled with each part of the instrument main body.

In order to prevent a load from being applied to the pull-through hole of the glove when inputting an operating force in the vertical direction of the pull-switch pull cord, the pull-string base of the pull switch and the pull-through hole of the glove are substantially vertically positioned at the glove mounting position. It is necessary to be located on the direction straight line. For this reason, it is not possible to set a plurality of mounting angles around the vertical axis of the glove with respect to the appliance body. Alternatively, it is necessary to arrange the through-hole of the pull switch lighting device at the center. However,
At the center of the lighting fixture, a connection portion with the wiring fixture is formed, so that it is difficult to arrange the pull switch.

[0007] Since it is necessary to provide a gap for preventing friction between the pull switch pull cord through hole of the glove and the pull switch pull cord, there is a possibility that insects may enter through the gap.

[0008]

Problems to be Solved by the Invention
In the case where the anti-rattle means is an elastic packing as in No. 3, a structure as disclosed in JP-A-10-162632 is used.
If an operation such as pulling too much of the pull switch pull cord during the switch operation is performed, the elastic packing of the fixture main body may be deformed by the switch operation force, and the entire lighting fixture may be shaken.
Also, if the rattling prevention means is not an elastic packing,
Since the difference in height of the wiring equipment cannot be absorbed by an easy means, another means is required.

Further, the wobble prevention device needs to have a strength enough to prevent the device main body from moving close to the ceiling surface by the operation force input to the pull switch pulling string. It is necessary to have elasticity enough to absorb the difference in height of the hooking ceiling, and it is difficult to prevent the instrument body from wobbling due to input of an operation force to the pull switch pulling string.

When the gap between the ceiling surface and the top surface of the fixture main body is absorbed by the elastic packing, the elastic packing is deformed at the proper mounting position of the fixture body to generate a repulsive force, thereby preventing the lighting fixture from wobbling. ing. At this time, stress is generated inside the elastic packing due to the deformation. If the elastic packing is used for a long time in this state, stress relaxation occurs due to aging and the resilience of the elastic packing becomes small. As a result, there is a possibility that wobbling of the lighting equipment cannot be prevented during long-term use. This is more likely to occur with lower height catch ceilings. Further, when the repulsive force is increased without increasing the stress at the time of deformation of the elastic packing in order to prevent stress relaxation of the elastic packing, the area of the elastic packing viewed from the upper surface must be increased.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a lighting apparatus which can prevent wobble and can cope with a difference in gap between a ceiling surface and a top surface of an apparatus main body top plate.

[0012]

According to a first aspect of the present invention, there is provided a lighting apparatus according to the first aspect of the present invention, in which a wiring body provided on a ceiling surface mounts the lighting device body with a gap between the lighting device body and the ceiling surface. In a lighting device, a pull switch provided on the device main body can be operated by a pull cord that is turned downward by an arm protruding sideways substantially along the top plate of the device main body. A wobble prevention device is provided between the ceiling surface on the side that moves closer to the ceiling surface of the appliance body by input of an operating force and the upper surface of the appliance body top plate to prevent the appliance body from moving closer to the ceiling surface. It is characterized by.

On the side that moves close to the ceiling surface of the appliance main body by inputting the operating force to the pull switch pull cord, the proximity movement of the appliance main body to the ceiling surface is interposed between the ceiling surface and the top surface of the appliance main body top plate. Since the wobble prevention device for preventing the wobble is provided, the lighting fixture does not wobble when the operation input to the pull switch is performed. Therefore, no discomfort is felt. In addition, it is possible to prevent the lighting fixture from falling due to repeated load applied to the ceiling mounting portion of the fixture due to the wobbling of the lighting fixture and deterioration in strength.

Further, the wobble prevention is achieved while the lighting fixture can be mounted on the ceiling surface with a slight gap between the lighting device and the ceiling surface via the wiring device provided on the ceiling surface. Therefore, the lighting fixture can be mounted close to the ceiling surface. Therefore, the room can be widely used.

According to a second aspect of the present invention, in the lighting apparatus according to the first aspect, the wobble preventing device is formed of a substantially rigid body interposed between the ceiling surface and the upper surface of the top plate of the fixture main body corresponding to the difference in height of the wiring fixture. . As described above, since the wobble prevention device responds to the difference in the height of the wiring device, it is not necessary to replace the wiring device when installing the lighting device. Therefore, not only the contractor but also the general user can easily install the lighting fixture.

Further, since the wobble prevention device is interposed between the ceiling surface and the upper surface (back surface) of the top plate of the device main body, when the lighting device is used, when the wobble prevention device is viewed from below the lighting device, Hide in the body. Therefore, the beauty of the lighting fixture is not impaired. In addition, the wobble prevention device has a high strength because it is formed of a substantially rigid body. Therefore, the wobble prevention device can be downsized.

According to a third aspect of the present invention, there is provided the lighting apparatus according to the first aspect, wherein the wobble preventer comprises a projection protruding substantially upward from the upper surface of the top plate of the apparatus main body, and a ceiling which is pressed against a side surface of the projection. And a friction part attached to the surface. At the mounting position of the lighting equipment, the wobble prevention device is mounted on the side of the protrusion projecting upward from the top surface of the lighting device main body so that the friction part attached to the ceiling surface is pressed into contact with the ceiling. Even when the lighting equipment is attached to the wiring equipment, the stress generated inside the protrusions and the friction parts is small, and the stress is relaxed, so that the normal force is reduced and the frictional force is not reduced.

The friction force is represented by a normal force and a friction coefficient, and does not depend on the contact area. Therefore, a high frictional force can be obtained while reducing the size of the protruding portion and the friction portion, and the wobble of the instrument body can be prevented.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A lighting apparatus according to a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a front view of a lighting apparatus according to a first embodiment of the present invention, FIG. 2 is a perspective view of a wobble prevention device according to the first embodiment, and FIG. 3 is a construction explanatory view of the first embodiment. is there.

In FIG. 1, 1 is a ceiling surface, 2 is a hooking ceiling (wiring device), 3 is a lighting device, and 4 is a wobble prevention device. The fixture body 5 of the lighting fixture 3 is attached to the ceiling surface 1 with a gap provided by a hooking ceiling 2 provided on the ceiling surface 1. Further, the pull switch provided on the instrument body 3a is connected to the glove 6 so as to be substantially along the instrument body top plate 5a.
It can be operated by a drawstring 8 turned downward by an arm 7 projecting more laterally.

The wobble preventing device 4 is provided between the ceiling surface 1 of the side B, which moves closer to the ceiling surface 1 of the appliance body 5 by inputting the operation force A to the pull cord 8 of the pull switch, and the upper surface of the appliance body top plate 5a. The device body 5 is provided to prevent the approaching movement of the appliance body 5 to the ceiling surface 1. In this case, as shown in FIG. 2, the wobble prevention device 4 is formed of a substantially rigid body, and includes a wobble prevention unit 10 provided on the ceiling surface 1 side and a receiving unit 11 provided on the appliance body 5 side. The lower surface of the wobble prevention part 10 is an inclined part 10 a that is inclined so as to face the center of the lighting fixture 3. The receiving portion 11 has a pair of lateral displacement preventing convex portions 11a, 11 on both sides of the wobble preventing portion 10 along the inclination direction of the inclined portion 10a.
a, and a height adjusting protrusion 11b is provided therebetween. Then, in a state where the wobble preventing portion 10 is positioned by the lateral displacement preventing convex portion 11a, the inclined portion 1
Oa is in contact with one corner of the upper surface of the height-adjusting projection 11b to prevent the lighting fixture 3 from wobbling in response to a difference in height of the hooking ceiling 2.

Next, the construction of the lighting fixture having the above configuration will be described. As shown in FIGS. 3A and 3B, the receiving portion 1
Numeral 1 is previously fixed to a predetermined position on the upper surface of the instrument main body top plate 5a, and changes the mounting position of the wobble prevention unit 10 depending on the difference in the height of the wiring instrument such as the hooking ceiling 2. That is, when the height of the hooking ceiling 2 is low as shown in FIG. 3A, the wobble prevention unit 10 is arranged on the upper part of the inclined part 10a such that the height-adjusting convex part 11b abuts. At this time, since the plate thickness of the wobble prevention unit 10 at the contact position is small, the overall height dimension of the wobble prevention tool 4 is reduced, and it is possible to cope with the low hooking ceiling 2. Conversely, when the height of the hooking ceiling 2 is high as shown in FIG.
The insertion depth C of the wobble prevention unit 10 is adjusted so that the height adjusting projection 11b abuts on the lower side of the part a. At this time, since the plate thickness of the wobble prevention portion 10 at the contact position is large, the overall height dimension of the wobble prevention device 4 is enlarged, and it is possible to cope with a high hooking ceiling 2.

As described above, the wobble preventing device 4 has an insertion depth C
By adjusting the height of the hooking ceiling 2, it is not necessary to set a plurality of height difference wobble preventers 4 for the height difference of the hooking ceiling 2. In addition, the wobble prevention unit 10 is permanently deformed by stress relaxation,
Even when the wobble of the device occurs, the wobble of the device can be easily prevented by further inserting the wobble prevention unit 10 deeply. Further, since the lateral displacement prevention convex portion 11a is substantially in contact with the side surface of the wobble prevention portion 10, the wobble prevention portion 10 is also provided with the height adjustment convex portion even when the instrument body 5 is rotated for alignment. 1
It does not fall off from 1b.

As described above, according to this embodiment, the ceiling surface 1 and the appliance main body top plate 5a are placed on the side of the appliance main body 5 that moves closer to the ceiling surface 1 by inputting the operating force to the pull switch pull cord 8. Since the wobble preventing device 4 is provided between the upper surface and the upper surface to prevent the appliance body 5 from moving toward the ceiling surface,
There is no wobble of the lighting equipment 3 when inputting an operation to the pull switch. Therefore, no discomfort is felt. In addition, it is possible to prevent the lighting fixture 3 from dropping due to the staggering of the lighting fixture 3, which repeatedly applies a load to the ceiling mounting portion 12 of the fixture and deteriorates the strength.

The wobble of the luminaire 3 can be mounted on the ceiling 1 with a slight gap between the luminaire 3 and the ceiling 1 via the hooking ceiling 2 provided on the ceiling 1. Since the prevention is achieved, the lighting fixture 3 can be mounted close to the ceiling surface 1. Therefore, the room can be widely used.

Further, since the wobble prevention device 4 is interposed between the ceiling surface and the upper surface (back surface) of the top plate 5a of the device main body, when the lighting device 3 is used, the wobble prevention device 4 becomes
When viewed from below, it is hidden by the instrument body 5. Therefore, the beauty of the lighting fixture 3 is not spoiled. In addition, since the wobble prevention tool 4 is formed of a substantially rigid body, the strength is high. Therefore, the wobble prevention device 4 can be downsized.

In this embodiment, the lighting equipment 3
And the pull switch provided on the instrument body 5
In order to prevent the wobble of the lighting fixture 3 while enabling the operation with the drawstring 8 turned downward by the arm 7 protruding laterally substantially along the line a, the thin glove 6 is formed. There is no need to provide a through hole for passing the pull switch pull cord 8 through the glove, and the glove 6 is not damaged when the tip of the pull cord 8 of the pull switch is pulled obliquely. In addition, since the load received to turn the pull switch pull cord 8 downward is not applied to the glove 6, the glove 6 is not likely to be broken. Further, since the globe 6 has a shape covering the side surface of the device main body 5, the amount of light does not decrease to the side of the device main body 5.

Further, a pull switch pull cord 8 is attached to the glove 6.
Since the through-hole for passing through is not provided, and the pull switch pull cord 8 is not drawn out from the through-hole, the glove can be easily attached even when the glove is attached to a rotating system. There is no possibility that the pull switch pull cord 8 is entangled with each part of the instrument body 5 during the rotation mounting operation of the glove 6. Further, a plurality of mounting angles of the glove 6 with respect to the appliance body can be provided. Further, since it is not necessary to provide a gap for preventing friction between the pull switch pull cord through hole of the glove 6 and the pull switch pull cord 8, it is possible to prevent insects from entering through the gap. Further, it is not necessary to dispose the pull switch outside the device of the glove 6, and there is no need for an outer shell for covering the pull switch.

A lighting fixture according to a second embodiment of the present invention will be described with reference to FIGS. FIG. 4 is a front view of a lighting apparatus according to a second embodiment of the present invention, FIG. 5 is a perspective view of a wobble prevention device according to the second embodiment, and FIG.
It is a construction explanatory view of the embodiment. The same members as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

In FIG. 4, reference numeral 14 denotes a wobble preventer, and the ceiling surface 1 on the side which moves closer to the ceiling surface 1 of the appliance body 5 by inputting an operating force to the pull cord 8 of the pull switch as in the above embodiment. To prevent the approaching movement of the instrument body 5 to the ceiling surface 1. As shown in FIG. 5, the wobble prevention device 14 is a substantially rigid rectangular parallelepiped, and is fixed by a double-sided tape 15 adhered to the upper surface of the instrument main body top plate 5a. In this case, the horizontal dimension of the side surface of the wobble prevention device 14 is a, the vertical dimension is b, the depth dimension is c, and each dimension is set so that b <c <a.

Next, the construction of the lighting fixture having the above configuration will be described. As shown in FIGS. 6A and 6B, the mounting posture of the wobble prevention device 14 is changed depending on the difference in the height of the wiring device such as the hooking ceiling 2. That is, FIG.
When the height of the hooking sealing 2 is low as shown in FIG.
By adhering to the ceiling 5 and interposing it between the ceiling surface 1 and the upper surface of the instrument body top plate 5a, it is possible to cope with a low hanging ceiling 2. Conversely, when the height of the hooking ceiling 2 is high as shown in FIG. 6B, the wobble prevention device 14 is rotated so that the dimension a becomes the vertical direction and adhered to the double-sided tape 15 to adhere to the ceiling surface 1.
By being interposed between the device and the upper surface of the instrument main body top plate 5a, it is possible to cope with a high hooking ceiling 2. In this case, the dimensional difference between the height of the hooking ceiling 2 and the dimensional difference between the dimensions a and b is set in advance so as to be the same.

As described above, in this embodiment, since the mounting direction of the wobble prevention device 14 is changed to cope with a difference in the height of the hooking ceiling 2, a plurality of different heights of the hooking ceiling 2 are required. There is no need to set a wobble prevention device of different height. In addition, since the wobble prevention device 14 is a substantially rectangular parallelepiped, it can be easily cut. Other configuration effects are the same as those of the first embodiment.

A lighting fixture according to a third embodiment of the present invention will be described with reference to FIGS. FIG. 7 is a front view of a lighting apparatus according to a third embodiment of the present invention, FIG. 8 is a perspective view of a wobble prevention device according to the third embodiment, and FIG.
It is a construction explanatory view of the embodiment. The same members as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

In FIG. 7, reference numeral 20 denotes a wobble prevention device, similar to the above-described embodiment, and the ceiling surface 1 on the side which moves close to the ceiling surface 1 of the appliance body 5 by inputting an operation force to the pull cord 8 of the pull switch. To prevent the approaching movement of the instrument body 5 to the ceiling surface 1. The wobble prevention device 20 is formed of a substantially rigid body, and includes a wobble prevention portion 21 provided on the ceiling surface 1 side and a receiving portion 22 provided on the appliance body 5 side, as shown in FIG. The wobble prevention unit 21 is a substantially rectangular parallelepiped. The receiving part 22 has a pair of lateral displacement prevention convex parts 22a, 22a arranged on both sides of the wobble prevention part 21, and the height adjusting convex part 2 having a plurality of steps therebetween.
2b. Then, the lateral deviation preventing convex portion 2
With the wobble prevention unit 21 positioned by 2a, the wobble prevention unit 21 is brought into contact with the upper surface of one of the steps of the height adjusting protrusion 22b, whereby the hooking sealing 2
The lighting fixture 3 is prevented from wobbling according to the height difference.

Next, the construction of the lighting fixture having the above configuration will be described. As shown in FIGS. 9A and 9B, the receiving portion 2
Numeral 2 is fixed at a predetermined position on the upper surface of the instrument main body top plate 5a in advance, and changes the mounting position of the wobble prevention unit 21 depending on the height of the wiring instrument such as the hooking ceiling 2. That is, when the height of the hooking ceiling 2 is low as shown in FIG. 9A, the wobble prevention unit 21 is arranged at a low step of the height adjusting projection 22 b. At this time, since the thickness of the receiving portion 22 at the contact position is small, the overall height dimension of the wobble prevention device 20 is reduced, and the low hanging ceiling 2 can be accommodated. Conversely, when the height of the hooking ceiling 2 is high as shown in FIG. 9B, the wobble prevention unit 21 is arranged at a high step of the height adjusting projection 22 b. At this time, since the plate thickness of the receiving portion 22 at the contact position is large, the height dimension of the entire wobble prevention tool 20 is enlarged, and it is possible to cope with the high hanging ceiling 2.

As described above, according to this embodiment, the mounting position of the wobble prevention device 20 is changed to cope with the difference in height of the hooking ceiling 2. There is no need to set a plurality of wobble prevention devices of different heights. The wobble prevention unit 21
Since it is a substantially rectangular parallelepiped, it can be easily cut. In addition, since the lateral displacement prevention convex portion 22a is substantially in contact with the side surface of the wobble prevention portion 21, the wobble prevention portion 21 is kept at a height-adjusting convex portion even when the instrument main body 5 is rotated for alignment. It does not fall off from 22b. Other configuration effects are the same as those of the first embodiment.

A lighting fixture according to a fourth embodiment of the present invention will be described with reference to FIGS. FIG. 10 is a front view of a lighting apparatus according to a fourth embodiment of the present invention, FIG. 11 is a perspective view of a wobble prevention device according to the fourth embodiment, FIG. 12 is an operation explanatory view of the fourth embodiment, FIG. 13 is a construction explanatory view of the fourth embodiment. The same members as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

In FIG. 10, reference numeral 25 denotes a wobble preventer, similar to the above-described embodiment, and the ceiling surface 1 on the side which moves closer to the ceiling surface 1 of the appliance body 5 by inputting an operation force to the pull cord 8 of the pull switch. Between the instrument body top plate 5a and the upper surface of the instrument body top plate 5a, and the proximity movement of the instrument body 5 to the ceiling surface 1 (indicated by E).
To prevent The wobble prevention device 25 is formed of a substantially rigid body, and as shown in FIG. 11, a projecting portion 26 projecting substantially upward from the upper surface of the instrument main body top plate 5 a, and presses or elastically contacts the side surface of the projecting portion 26. And a friction portion 27 attached to the ceiling surface 1. In this embodiment, as shown in FIG. 12, by inputting the operation force to the pull switch pull cord 8,
Even if the appliance body 5 attempts to move close to the ceiling surface 1, the protruding portion 26 comes into contact with the friction portion 27 and is prevented. At this time, the vertical drag N increases due to the approach movement of the instrument body 5 to the ceiling surface 1. Accordingly, the friction force (F = μN) also increases. At the time of construction, as shown in FIGS. 13 (a) and 13 (b), when the projecting portion 26 is displaced with respect to the friction portion 27, it is possible to cope with a difference in height of wiring devices such as the hooking ceiling 2.

In the luminaire having the above configuration, the ceiling mounting portion 28 at the center of the luminaire main body 5 is connected to the hanging ceiling 2. At this time, when an operation force is input to the pull switch pull cord 8, the lighting fixture 3 moves close to the ceiling surface 1 with the hook ceiling 2 as a fulcrum. This movement is caused by the protrusion 26
Since a component that moves in seven directions is included, the normal force N generated between the protruding portion 26 and the friction portion 27 increases. Therefore, the frictional force F is sharply increased by the operation force on the pull switch pull cord 8, so that the approach movement of the lighting fixture 3 to the ceiling surface 1 is prevented.

Since the frictional force F between the protruding portion 26 and the friction portion 27 is generated irrespective of the difference in height of the hooking ceiling 2, a plurality of protrusions and friction portions are prevented from wobbling against the difference in height of the hooking ceiling 2. There is no need to set tools.

The protruding portion 26 and the friction portion 27 can be formed of a substantially rigid body. In this case, even when the height of the hooking ceiling 2 is different, the relative positions of the protruding portion 26 and the friction portion 27 that are slightly elastically contacted are the same. In addition, the frictional force F for preventing the lighting fixture 3 from moving close to the ceiling surface 1 can be obtained substantially constant. Further, when a lighting device is mounted on a wiring device having a low height, such as an elastic packing, stress relaxation inside the elastic packing is caused to reduce the repulsion force, causing the lighting device to be unstable, and a high-height ceiling 2. When the lighting equipment 3 is attached to the lighting equipment 3, the resilience of the elastic packing is reduced, and the lighting equipment 3 does not fluctuate.

[0042]

According to the lighting apparatus of the present invention, the side moving closer to the ceiling surface of the apparatus main body by inputting the operating force to the pull switch pull cord is interposed between the ceiling surface and the upper surface of the apparatus main body top plate. In addition, since the wobble prevention device for preventing the fixture body from moving close to the ceiling surface is provided, the lighting device does not wobble when inputting an operation to the pull switch. Therefore, no discomfort is felt. In addition, it is possible to prevent the lighting fixture from falling due to repeated load applied to the ceiling mounting portion of the fixture due to the wobbling of the lighting fixture and deterioration in strength.

The wobble prevention is achieved while the lighting fixture can be mounted on the ceiling with a slight gap between the lighting fixture and the ceiling via a hooking ceiling provided on the ceiling. Therefore, the lighting fixture can be mounted close to the ceiling surface. Therefore, the room can be widely used.

According to the second aspect, the wobble prevention device can cope with a difference in height of the hooking ceiling, so that it is not necessary to replace the hooking ceiling when mounting the lighting fixture. Therefore, not only the contractor but also the general user can easily install the lighting fixture.

Further, since the wobble prevention device is interposed between the ceiling surface and the top surface (back surface) of the device main body top plate, when the lighting device is used, the wobble prevention device is viewed from below the lighting device. Hide in the body. Therefore, the beauty of the lighting fixture is not impaired. In addition, the wobble prevention device has a high strength because it is formed of a substantially rigid body. Therefore, the wobble prevention device can be downsized.

According to the third aspect of the present invention, at the mounting position of the lighting fixture, the wobble preventing tool is so arranged that the friction portion attached to the ceiling surface is pressed against the side surface of the projecting portion projecting substantially upward from the upper surface of the top plate of the lighting device main body. Even if the luminaire is mounted on a low-height ceiling, the projections,
The stress generated inside the friction portion is small, and the stress is relaxed so that the normal force decreases and the friction force does not decrease.

The friction force is represented by a normal force and a friction coefficient, and does not depend on the contact area. Therefore, a high frictional force can be obtained while reducing the size of the protruding portion and the friction portion, and the wobble of the instrument body can be prevented.

[Brief description of the drawings]

FIG. 1 is a front view of a lighting fixture according to a first embodiment of the present invention.

FIG. 2 is a perspective view of the wobble prevention device according to the first embodiment.

FIG. 3 is a construction explanatory view of the first embodiment.

FIG. 4 is a front view of a lighting fixture according to a second embodiment of the present invention.

FIG. 5 is a perspective view of a wobble preventer according to a second embodiment.

FIG. 6 is an explanatory diagram of construction according to a second embodiment.

FIG. 7 is a front view of a lighting fixture according to a third embodiment of the present invention.

FIG. 8 is a perspective view of a wobble preventer according to a third embodiment.

FIG. 9 is a construction explanatory view of the third embodiment.

FIG. 10 is a front view of a lighting fixture according to a fourth embodiment of the present invention.

FIG. 11 is a perspective view of a wobble preventer according to a fourth embodiment.

FIG. 12 is an operation explanatory view of the fourth embodiment.

FIG. 13 is an explanatory diagram of construction according to a fourth embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ceiling surface 2 Hanging ceiling (wiring equipment) 3 Lighting equipment 4, 14, 20, 25 Wobble prevention equipment 5 Equipment main body 5a Equipment main body top plate 7 Arm 8 Pull switch pull cord 26 Projecting part 27 Friction part

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Satoshi Teramoto 1048 Kadoma Kadoma, Osaka Prefecture Matsushita Electric Works, Ltd. (72) Inventor Kunihiko Tsujimoto 1048 Kadoma Kadoma, Kadoma City, Osaka Matsushita Electric Works Co., Ltd. (72) Inventor Masaaki Ichikawa 1048 Kazuma Kadoma, Kadoma City, Osaka Prefecture (72) Inventor Yosuke Masaki 1048 Kadoma Kadoma, Kadoma City, Osaka Prefecture Inside the Matsushita Electric Works Co., Ltd. (72) Hiroshi Yuda Kadoma Kadoma, Osaka Prefecture 1048 Matsushita Electric Works, Ltd.

Claims (3)

[Claims] An appliance main body is attached to a ceiling surface by a wiring device provided with a gap therebetween, and a pull switch provided on the appliance main body is laterally moved substantially along a top plate of the appliance main body. In a lighting fixture operable with a drawstring that is turned downward by a protruding arm, a ceiling surface on a side that moves close to the ceiling surface of the fixture body by inputting an operating force to the pullstring of the pull switch and a ceiling of the fixture body. Between the top of the board,
A lighting fixture, comprising a wobble preventer for preventing the fixture main body from moving close to a ceiling surface. 2. The lighting fixture according to claim 1, wherein the wobble prevention device is formed of a substantially rigid body interposed between the ceiling surface and the top surface of the fixture main body corresponding to the difference in height of the wiring fixture. 3. The wobble preventer comprises a projecting portion projecting substantially upward from an upper surface of a top plate of the instrument main body, and a friction portion attached to a ceiling surface so as to press against a side surface of the projecting portion. The lighting fixture according to 1.