JP4493144B2 - lighting equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lighting device such as a spotlight or a downlight.
[0002]
[Prior art]
Lighting fixtures such as spotlights and downlights, in principle, hold a lamp and supply power to the lamp, a reflector that determines the light distribution by receiving light from the lamp and reflecting it in a specified direction, and these components It is comprised from the housing | casing which accommodates or hold | maintains, ie, a body. Conventional lighting fixtures generally have a structure in which a socket is attached to the body and a reflector is attached to the body.
[0003]
[Problems to be solved by the invention]
One problem with conventional lighting fixtures is that high light distribution accuracy cannot be ensured. That is, in the structure in which the socket and the reflective plate are respectively attached to the body, due to the influence of both the dimensional play existing between the socket and the body and the dimensional play existing between the reflector and the body ( A certain amount of play is required for easy assembly and disassembly), and the alignment between the reflector and the socket (that is, the lamp) cannot be performed with high accuracy. As a result, the light distribution accuracy is low.
[0004]
Another problem with conventional lighting fixtures is that the body becomes hot due to heat from the lamp. In other words, a large amount of radiant heat emitted from the lamp hits the reflector and raises the reflector. Since the reflector is attached to the body, the body is heated by heat conduction from the reflector to the body. Since the body is a place where people can touch, it is necessary to suppress the output light quantity of the lamp within a sufficiently safe range. In addition, since the lamp itself becomes very hot, the life of the lamp is not long.
[0005]
Further, in a conventionally known lighting fixture structure, a front glass plate for covering an opening from which light is emitted is disposed in front of the reflector, and directly from the lamp at the center of the front glass plate. Some have a metal shield cap that shields light emitted forward. In this structure, the front glass plate and the shield cap are heated by receiving radiation heat from the lamp, but both of them can absorb the difference in thermal expansion caused by the difference between the materials of the front glass plate and the shield cap. Therefore, those skilled in the art are struggling with the mounting structure.
[0006]
Accordingly, an object of the present invention is to provide a lighting fixture with high light distribution accuracy.
[0007]
Another object of the present invention is to provide a luminaire that has a high heat dissipation performance and is unlikely to become hot at the body, so that a lamp having a higher output can be used.
[0008]
Another object of the present invention is to provide a lighting fixture in which a front glass plate and a shield cap are attached with a novel structure capable of effectively absorbing the difference in thermal expansion between the two.
[0009]
[Means for Solving the Problems]
A lighting fixture according to a first aspect of the present invention includes a socket module having a socket for fixing a lamp, a mirror module having a reflector for distributing light from the lamp, and a body for housing the mirror module. The mirror module is directly attached to the socket module. According to this lighting fixture, since the mirror module is directly attached to the socket module, misalignment between the reflecting plate of the mirror module and the lamp fixed to the socket module can be reduced. The module only needs to have a dimensional play between the socket module and the position alignment accuracy between the reflector and the lamp is higher than the conventional one, and thus the light distribution accuracy is higher.
[0010]
In a preferred embodiment, the socket module has a heat radiating member for radiating heat, and the mirror module is directly attached to the heat radiating member. As a result, the heat of the reflecting plate that has received the radiant heat from the lamp is effectively transmitted to the heat radiating member of the socket module to be dissipated. This also means that the output of the lamp that can be used is larger than before.
[0011]
In a preferred embodiment, the reflector of the mirror module is further away from the body without substantially contacting the body. Therefore, the amount of heat transferred to the body is further reduced, and the body is unlikely to become hot.
[0012]
In a preferred embodiment, furthermore, there is a space inside the body that surrounds the reflector of the mirror module from the outside, and the body allows outside air to flow into the space in the body and to be discharged out of the body again. A hole for the air flow path is opened. Thereby, the heat dissipation performance from a reflector and a body further increases.
[0013]
In a preferred embodiment, the mirror module further includes an attachment member for directly attaching to the heat dissipation member of the socket module, and both the attachment member and the heat dissipation member are made of aluminum die cast. Combined with the high thermal conductivity of aluminum and the large surface area of the die-cast component, the performance of radiating heat from the reflector through the heat radiating member is further enhanced.
[0014]
In a preferred embodiment, the body is also made of aluminum die-casting. Therefore, the heat dissipation performance of the body is high, and the high temperature of the body is more effectively prevented.
[0015]
In a preferred embodiment, a hood module having an annular hood is disposed in front of the mirror module, and there is a space surrounding the reflector from the inside of the body. There is a hole for introducing outside air into the space of the body, and the body has a hole for discharging the air in the space to the outside. As a result, an air flow can be generated in which outside air enters the space outside the reflector in the body through the hole in the front hood module and exits the body again, thereby further improving the heat dissipation performance of the reflector and the body.
[0016]
A lighting fixture according to a second aspect of the present invention is disposed in front of a mirror module having a socket module having a socket for fixing a lamp, a mirror module having a reflector for distributing light from the lamp, and the mirror module. A front glass plate, and a shield cap attached to the center of the front glass plate for blocking light emitted directly from the lamp. And the play of the dimension which can absorb the difference in thermal expansion amount of both exists between a front glass plate and a shield cap. The shield cap is attached to the front glass plate in an elastically pressed state by an elastic material so as to be able to absorb the difference in thermal expansion between the two. According to this lighting fixture, the front glass plate and the shield cap can be successfully attached in a state in which the difference in thermal expansion between the two can be absorbed.
[0017]
Other objects and features of the present invention will become apparent in the following description.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a perspective view showing an appearance of a lighting fixture according to an embodiment of the present invention. 2, 3, 4, and 5 are a side view, a bottom view, a plan view, and a front view of the luminaire, respectively. 6 and 7 are a cross-sectional view taken along line AA and a cross-sectional view taken along line BB in FIG. 5, respectively.
[0019]
This luminaire 1 is configured as a spotlight that can be mounted on an indoor ceiling or the like by an arm 3 so as to be vertically tiltable and horizontally rotatable. However, the spotlight is only one application example of the lighting fixture of the present invention, and the lighting fixture of the present invention can be implemented for various uses such as a downlight embedded in a ceiling and a bracket attached to a wall.
[0020]
Now, the illustrated spotlight 1 is configured by combining several modules. One of these modules is the arm 3 described above, and the other is a generally cylindrical body 5 serving as a housing. A hood module 7 is attached to the front end of the body 5 to form a light exit. Further, a socket module 9 containing a socket 15 for fixing and supplying a lamp 13 (see FIGS. 6 and 7) is fitted inside the rear end portion of the body 5, and the latter half portion of the socket module 9 has a heat dissipation performance. In order to improve the quality, the body 5 protrudes from the rear end. Furthermore, the mirror module 11 having the reflecting mirror 17 (see FIGS. 6 and 7) is housed inside the body 5 in a state of being fixed to the front portion of the socket module 9. As described above, the spotlight 1 basically includes four modules: the arm 3, the body 5, the hood module 7, the socket module 9, and the mirror module 11. Hereinafter, the configuration of each of these modules and the mutual relationship will be described.
[0021]
The body 5 is made of aluminum die-casting, and has a substantially cylindrical shape with both front and rear ends open and having a diameter that increases toward the front. There are several slits 21, 21,... Running from the front end to the rear end on the bottom wall of the body 5, and several slits running from the front end to the rear end on the top wall of the body 5. There are 23, 23,. These slits 21, 21,..., 23, 23,... Function as air flow paths for circulating air between the outer space and the inner space of the body 5. In particular, the air flow enters the inner space 19 of the body 5 from the slits 21, 21,... Of the bottom wall and exits through the slits 23, 23,. The heat radiation from the inner socket module 9 and the mirror module 11 and the heat radiation of the body 5 itself are promoted. In addition, as will be described later, there is also an air flow that enters the inner space 19 of the body 5 through the slit 36 of the hood module 7 and exits through the slits 23, 23,. The air flow also promotes heat dissipation from the socket module 9, the mirror module 11 and the body 5.
[0022]
In this embodiment, the body 5 is a cylindrical body having slits as described above. However, if the heat dissipation effect described above is to be maximized, the heat dissipation from the mirror module 11 that is at a high temperature is particularly important. If the effect is to be enhanced, as shown in FIG. 14, for example, a mirror is provided between the front annular portion 5A to which the hood module 7 is attached and the rear annular portion 5B into which the socket module 9 is fitted. A skeleton structure connected by several arms 5C, 5C,... Surrounding the module 11 can also be used. A large gap between the arms 5C, 5C,... Assists heat radiation from the mirror module 11 and the like.
[0023]
As shown in FIGS. 1, 5, 6, and 7, the hood module 7 is attached to the front end of the body 5 and is an annular aluminum die-cast hood 25 having the same outer diameter as the front end of the body 5. And an annular aluminum die-cast frame 25 having an outer diameter slightly smaller than the inner diameter of the hood 25 and disposed concentrically with the hood 12 inside the hood 25. A circular front glass plate 29 having an outer diameter substantially the same as the outer diameter of the frame 25 is fixed to the rear end surface of the frame 25 so as to cover the inner opening of the frame 25. The front glass plate 29 covers the front opening of the bowl-shaped reflecting mirror 17 of the mirror module 11 and serves to prevent the fragments of the lamp 13 from scattering and jumping forward when the lamp 13 is broken. Have. A circular hole is formed at the center of the front glass plate 29, and a lamp shield 31 having a substantially cylindrical cap shape with a closed front end is fitted into the hole. The lamp shield 31 is made of aluminum die-casting, and serves to shield the light emitted forward by the lamp 31 and prevent the direct light from the lamp 31 that is not controlled by the reflector 17 from being emitted forward. The lamp 31 and the reflector inner space 81 (see FIG. 6) have a role of helping heat radiation.
[0024]
As shown briefly in FIG. 5, the hood 25 and the frame 27 are connected by small bridges 33, 33,... Provided at a plurality of locations on the inner periphery of the hood 25. The hood 25, the frame 27, and the bridges 33, 33,... Are integrally formed by aluminum die casting. The portions between the hood 25 and the frame 27 other than the portions connected by the bridges 33, 33,... Are slits 35, 35,. As shown in FIG. 6, these slits 35, 35,... Pass through the outside of the front glass plate 29 to the space 19 outside the mirror unit 11 inside the body 5. As described above, the air flow that enters the inner space 19 of the body 5 through the slits 35, 35,... From the outside and exits through the slits 23, 23,. Heat dissipation of the reflector 17, the socket module 9, and the body 5 is promoted.
[0025]
Next, the mirror module 11 and the socket module 9 will be described with reference to FIGS. FIG. 8 is a perspective view of the mirror module 11 as viewed obliquely from the rear. FIG. 9 is a partially cutaway perspective view showing the inside of the socket module 9 as viewed obliquely from the front and partially broken. FIG. 10 is a cross-sectional view taken along the central axis of the mirror module 11, and FIG. 11 is a cross-sectional view taken along the central axis of the socket module 9.
[0026]
As shown in these drawings, the mirror module 11 includes a bowl-shaped reflecting mirror 17 having an open front end and a rear end, and an aluminum die-cast annular ring 41 fixed to the rear end portion of the reflecting mirror 17; The ring 41 has four legs 43 extending rearward from four locations on the outer periphery of the ring 41 and integrally formed with the ring 41 by aluminum die casting.
[0027]
On the other hand, the socket module 9 fixes the cylindrical socket 15 made of ceramic with the electrode 61 into which the lamp 13 is screwed in, the socket cap 53 that surrounds and holds the socket 15 in close contact, and the socket 15. A socket pedestal 57 having a substantially H-shaped cross-section, and a substantially cylindrical heat radiation cylinder 59 which accommodates these components 53, 15 and 57 on the inside and is provided with irregularities and heat radiation fins on the outside. The socket cap 53, the socket pedestal 57, and the heat radiating cylinder 59 are all made of aluminum die cast. A rectangular metal plate 61 is fixed to the rear end surface of the socket 15, and ears 63 protrude from two locations on the outer periphery of the rear end portion of the socket cap 53, and the metal plate 61 of the socket 15, The ear 63 of the socket cap 53 is overlapped and screwed to the front end of the socket base 57, whereby the socket 15 and the socket cap 53 are fixed to the socket base 57. The socket pedestal 57 is fixed to the heat radiating tube 59 at its rear end surface.
[0028]
As can be seen from FIGS. 6 and 7, when assembled in the body 5, the socket module 9 is provided inside the vicinity of the rear end portion of the body 5 at a substantially central portion in the front-rear direction of the heat radiating tube 59. It fits inside the circular ring part 71 and is fixed to the body 5. Then, the four legs 43 at the rear end of the mirror module 11 are fitted from the outside to the front part from the center part of the heat radiating tube 59, so that the mirror module 11 and the socket module 9 are directly coupled. Has been. Between the mirror module 11 and the body 5, there is a small area contact between the rear end surface of the foot 43 of the mirror module 11 and the front end surface of the inner ring 71 of the body 5. There is no direct contact. Therefore, the mirror module 11 and the body 5 are substantially separated via a space.
[0029]
As described above, since the mirror module 11 is directly coupled to the socket module 9, the misalignment in the alignment between the reflecting mirror 17 of the mirror module 11 and the lamp 13 fixed to the socket module 9 is caused by the mirror. Only dimensional play between the module 11 and the socket module 9 is required. Therefore, the positional alignment between the reflecting mirror 17 and the lamp 13 can be performed with higher accuracy than the conventional lighting fixture, and thus the light distribution accuracy is high.
[0030]
Further, since the mirror module 11 is directly coupled to the heat radiating tube 59 of the socket module 9 and is substantially away from the body 5, the heat of the reflecting mirror 17 that receives the radiant heat from the lamp 13 is It is transmitted mainly to the heat radiating tube 9 of the socket module 9 by heat conduction and released to the outside air. Moreover, the portions 41 and 43 and the heat radiating tube 59 coupled to the heat radiating tube 59 of the mirror module 11 are made of aluminum die cast having a high thermal conductivity and a large volume, and their shapes are also uneven and have a large surface area. The heat radiation effect from the mirror module 11 through the heat radiation tube 59 is high. Further, in the configuration of the socket module 9 itself, since the socket 15 is fixed to the aluminum die cast socket cap 53 and the socket base 57 and connected to the heat radiating tube 59, the heat from the socket 15 that the socket module 9 itself has. The performance to escape is high. Further, as described above, the air flow flowing through the outer periphery of the mirror module 11 inside the body 5 and the socket module 9 through the slits 21, 21,..., 23, 23, 35, 35,. To do. As a result, the amount of heat generated by the lamp 13 is transmitted to the body 5 is small, and the body 5 is less likely to reach a higher temperature than the conventional lighting device. This means that a lamp 13 with a higher output can be used compared to a conventional lighting device.
[0031]
Further, as can be seen from FIG. 6 and FIG. 7, the socket 15 of the socket module 9 and the front half of the socket cap 41 covering the socket 15 are fitted inside the ring 41 of the mirror module 11, The rear end opening is completely blocked. As described above, the opening in front of the reflecting mirror 17 is completely closed by the front glass plate 29. Therefore, the inner space 81 of the reflecting mirror 17 where the lamp 13 is present is in a state of being isolated from other spaces, and even if the lamp 13 bursts, the fragments of the lamp 13 are separated from the inner space 81 of the reflecting mirror 17. (Of course, outside the spotlight 1) will not be scattered.
[0032]
Now, the temperature of the inner space 81 of the reflecting mirror 17 where the lamp 13 is present becomes considerably high. Therefore, in particular, the coupling structure between the front glass plate 29 and the aluminum die-cast shield cap 31 fitted in the center of the glass plate 29 is a structure that can absorb the difference in thermal expansion between glass and aluminum. There is a need. FIG. 12 is a cross-sectional view showing such a coupling structure between the front glass plate 29 and the shield cap 31. FIG. 13 is a perspective view showing a metal leaf spring ring 101 used in this coupling structure. In addition, the cross section of FIG. 12 is along the CC line | wire of FIG.
[0033]
As shown in FIG. 12, the shield cap 31 has a cylindrical shape having an outer shape like an umbrella, and a relatively thin portion on the rear end side corresponding to the handle portion of the umbrella is a front glass plate 29. It is inserted from the front into a circular hole 91 drilled in the center of the. The outer diameter of the portion 93 fitted in the circular hole 91 of the shield cap 31 is slightly smaller than the inner diameter of the circular hole 91, so that a slight gap is formed between them. The difference in the amount of thermal expansion in the direction is absorbed.
[0034]
In addition, on the outer periphery of the portion 95 of the shield cap 31 that protrudes through the circular hole 91 and protrudes to the rear of the front glass plate 29, hook-shaped protrusions 97, 97,... ing. A metal leaf spring ring 101 as shown in FIG. 13 is fitted on the neck portion 98 between the projections 97 of the shield cap 31 and the front glass plate 29. As shown in FIG. 13, the leaf spring ring 101 has a flat ring shape, and has leaf springs 103, 103,... Curved along the circumference at three locations on the inner peripheral surface thereof. The diameter of the inner peripheral surface of the leaf springs 103 and 103 is a size that just fits the outer diameter of the neck portion 98 of the shield cap 31. When the leaf spring ring 101 is externally fitted to the neck portion 98 of the shield cap 31, the three leaf springs 103, 103,... .. Are interposed between the projections 97,... And the front glass plate 29, respectively, and serve to push the shield cap 31 backward against the front glass plate 29. By the action of the leaf springs 103, 103,..., The rear end surface 113 of the large diameter portion corresponding to the hem portion of the shield cap 31 where the parasol spread is brought into close contact with the front surface around the hole 91 of the front glass 29. The elasticity of the leaf springs 103, 103,... Absorbs the difference in the amount of thermal expansion between the shield cap 31 and the front glass plate 29 in the axial direction.
[0035]
Further, as shown in FIG. 13, there are protrusions 105, 105,... That are cut and raised at three locations on the surface of the leaf spring ring 101 that contacts the front glass plate 29, and these protrusions 105, 105,. As shown in FIG. 12, it fits into recesses 99, 99,... Formed at three locations on the rear surface around the hole 91 of the front glass plate 29. As shown in FIG. The projections 105, 105,... Of the leaf spring ring 101 fit into the recesses 99, 99,... Of the front glass plate 29, and 103, 103,. Thus, the shield cap 31 and the front glass plate 29 are accurately aligned so that the centers of the two coincide.
[0036]
As described above, since the rear end surface 113 of the hem portion of the shield cap 31 where the parasol spreads and the front surface around the hole of the front glass 29 are always in close contact with each other, heat dissipation from the front glass 29 through the shield cap 31 is also achieved. good. Further, as can be seen from FIGS. 6 and 7, no extra parts are interposed between the lamp 13 and the shield cap 31 (in the past, there are parts for fixing the shield cap 31 to the front glass plate 29). Therefore, the heat dissipation from the lamp 13 through the shield cap 31 is also good.
[0037]
Although one embodiment of the present invention has been described above, the above embodiment is merely an example for explaining the present invention, and is not intended to limit the present invention only to the above embodiment. Therefore, the present invention can be implemented in various forms other than the above-described embodiments without departing from the gist thereof.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an external appearance of a lighting apparatus according to an embodiment of the present invention when viewed obliquely from below.
FIG. 2 is a side view of the luminaire.
FIG. 3 is a bottom view of the lighting apparatus.
FIG. 4 is a plan view of the luminaire.
FIG. 5 is a front view of the lighting apparatus.
6 is a cross-sectional view taken along the line AA in FIG. 5 of the luminaire.
7 is a cross-sectional view of the luminaire along the line B-B in FIG. 5;
FIG. 8 is a perspective view of the mirror module 11 as viewed obliquely from the rear.
FIG. 9 is a partially broken perspective view showing the inside of the socket module 9 as viewed obliquely from the front and partially broken.
10 is a cross-sectional view taken along the central axis of the mirror module 11. FIG.
11 is a cross-sectional view taken along the central axis of the socket module 9. FIG.
12 is a cross-sectional view taken along the line CC of FIG. 13, of a joint portion between the front glass plate 29 and the shield cap 31. FIG.
13 is a perspective view showing a metal leaf spring ring 101 used in the coupling portion of FIG. 12. FIG.
FIG. 14 is a perspective view showing an appearance of a lighting apparatus according to an embodiment of the present invention having a skeleton-structured body 5 when viewed obliquely from the rear.
[Explanation of symbols]
1 Lighting equipment (spotlight)
5 Body 7 Hood module 9 Socket module 11 Mirror module 13 Lamp 15 Socket 17 Reflector 19 Spaces 21, 23, 35 surrounding the reflector on the inside of the body from the outside Slit 29 Front glass plate 31 Shield cap 41 Ring 43 Foot 53 Socket cap 57 Socket base 59 Radiating tube 91 Circular hole 97 in the center of the front glass plate Hook-like projection 98 Neck portion 99 of the shield cap Recess 101 Leaf spring ring 103 Leaf spring 105 Cut and raised protrusion

Claims (3)

A socket module having a socket for fixing the lamp;
A mirror module having a reflector for distributing light from the lamp;
A body for housing the mirror module;
The mirror module is directly attached to the socket module;
The socket module has a heat radiating member for radiating heat,
The mirror module is directly attached to the heat dissipation member of the socket module;
The reflector of the mirror module is substantially away from the body;
Inside the body, there is a space surrounding the reflector of the mirror module from the outside,
The lighting apparatus, wherein the body has a hole for an air flow path for allowing outside air to flow into the space in the body and to discharge the air outside the body again . A hood module having an annular hood disposed in front of the mirror module;
Inside the body, there is a space surrounding the reflector of the mirror module from the outside,
The hood module has a hole for introducing outside air into the space of the body;
The lighting fixture according to claim 1, wherein the body has a hole for discharging the air in the space to the outside. Between the front glass plate and the shield cap, there is a dimensional play that can absorb the difference in thermal expansion between the two,
The shield cap is attached to the front glass plate in an elastically pressed state so that the difference in thermal expansion can be absorbed by an elastic material.
The lighting fixture according to claim 2 .

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