JP2009218215A - Lighting fixture - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lighting fixture in which the fixture is downsized, heat conduction efficiency of a lamp base to a fixture body becomes higher, and a temperature rise of the entire lamp base is effectively suppressed. <P>SOLUTION: The lighting fixture includes the fixture body 1 with a lamp socket 2, a lamp 3 having the lamp base 3a to be suitable for the lamp socket 2, and a reflector 4 which is provided at the fixture body 1 and surrounds a periphery of the lamp 3, wherein vicinity of the lamp socket 2 is covered with the fixture body 1 to such an extent that air flow is not nearly produced inside and outside the fixture body 1, and a vicinity part A which is made close to vicinity of the lamp base 3a is formed at the fixture body 1 so as to surround a periphery of the lamp base 3a. The fixture body 1 integrally covers the lamp 3 fitted at the plurality of lamp sockets 2, and the vicinity part A of the fixture body 1 is formed in a cylindrical shape for each lamp socket 2 of the plurality of those, and the plurality of cylindrical vicinity parts A are coupled with each other by a wall member B. Thus, heat temperature distribution at each lamp center part can be uniformized, thus, the temperature rise of a lamp base part can be reduced. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a lighting fixture applied to a downlight, a variable light distribution type lighting fixture, and the like.

  Conventional ceiling-mounted lighting fixtures are provided with a lamp socket on the inner top surface of a cylindrical fixture main body, a lamp base part is attached to the lamp socket, and a reflecting mirror is provided so as to surround the lamp. Things are generally known. And in order to reduce the temperature rise of a lamp cap part, there exist some which made the opening diameter of the part through which the lamp | ramp of a reflector passes large, and promoted the convection of air. However, with such an instrument configuration, the opening diameter of the reflecting mirror is increased, the shape of the instrument is complicated and large, and the manufacturing cost is increased.

  Therefore, in order to suppress the temperature rise of the lamp base part without increasing the opening diameter of the reflector, a heat sink is provided in the fixture body so as to surround the lamp base part, and the temperature rise of the lamp base part due to lamp light heat is increased. The lighting fixture made to suppress is proposed (refer patent document 1). In this lighting fixture, there is no air convection from the lower surface of the fixture in the lamp chamber, that is, in the reflector.

JP 2000-348531 A

  However, in the luminaire shown in Patent Document 1, the heat sink is provided so as to surround the lamp base, but the idea of making the heat sink positively close to the lamp base is not shown. For this reason, it is not sufficient to conduct the heat of the lamp cap part from the entire periphery to the container, and the heat dissipation of the lamp socket part may be insufficient.

  The present invention solves the above-described problem, and provides a lighting fixture that can effectively reduce the temperature increase of the entire lamp base portion by reducing the size of the fixture, increasing the heat conduction efficiency of the lamp base portion to the body. The purpose is to provide.

  In order to achieve the above-mentioned object, the invention of claim 1 is provided in an instrument body (referred to as a container) provided with a lamp socket, a lamp having a lamp cap portion mounted on the lamp socket, and the container. In a lighting fixture comprising a reflector surrounding the lamp, the vicinity of the lamp socket is covered with a vessel so that air flow inside and outside the vessel does not substantially occur, and the vessel is provided near the lamp base. Proximity parts are formed close to each other, and the proximity part is provided so as to surround the periphery of the lamp base part, and includes a plurality of the lamp sockets, and the vessel body is a lamp mounted on the plurality of lamp sockets. Are formed in a cylindrical shape for each of a plurality of lamp sockets, and the plurality of cylindrical proximity portions are connected to each other by a wall member.

  According to a second aspect of the present invention, in the lighting apparatus according to the first aspect, each of the plurality of wall members that connect the plurality of cylindrical proximity portions is extended from the vicinity of the central portion of the one adjacent portion at one end side. The other end side is connected to the outer periphery of the adjacent proximity portion.

  According to a third aspect of the present invention, there is provided an appliance body (referred to as a container) provided with a lamp socket, a lamp having a lamp base portion mounted on the lamp socket, and a reflection provided on the container and surrounding the periphery of the lamp. In a lighting fixture equipped with a mirror, the vicinity of the lamp socket is covered with a container so that air flow inside and outside the container is hardly generated, and a proximity part is formed on the container in the vicinity of the lamp base part. The proximity portion is provided so as to surround the periphery of the lamp base portion, and includes a plurality of the lamp sockets, and the vessel body integrally covers the lamps mounted on the plurality of lamp sockets, and The proximity part of the container is formed in a cylindrical shape for each of the plurality of lamp sockets, and a heat conduction part that conducts heat by contacting the lamp socket mounting surface is provided in the container center side space of the plurality of proximity parts. Is

According to the first aspect of the present invention, the proximity portions of the plurality of lamps are connected to each other, so that the temperature distribution of the heat at the center of each lamp that has risen in temperature due to the plurality of lamps can be made uniform. The temperature rise of the part can be reduced.
According to the invention of claim 2, the adjacent portions of the plurality of lamps are connected to each other from the central portion where the temperature of the adjacent portion of each lamp is high to the outer portion where the temperature of the adjacent portion of the adjacent lamp is low. The temperature distribution in the proximity part can be made uniform, and the temperature rise in the lamp base part can be reduced.
According to the invention of claim 3, since the heat conducting portion that conducts heat by contacting the lamp socket mounting surface is provided in the central portion of the proximity portion of the plurality of lamps, the temperature rise of the lamp base portion can be reduced. .

(A) is a front view of the lighting fixture which concerns on Example 1 of this invention, (b) is a half-cut side view, (c) is a partially expanded view. (A) is a top view of the lighting fixture which concerns on Example 2 of this invention, (b) is a sectional side view, (c) is a partially expanded view. (A) is a top view of the lighting fixture which concerns on Example 3 of this invention, (b) is a half-cut side view. (A) is sectional drawing of the reflective mirror in Example 3 same as the above, (b) is an external view of a reflective mirror. The half-cut sectional view of the lighting fixture which concerns on Example 4 of this invention. (A) is the half cut enlarged view of the lighting fixture which concerns on Example 5 of this invention, (b) is a cross-sectional view of the proximity | contact part. (A) is a front view of the lighting fixture which concerns on Example 6 of this invention, (b) is a half-cut side view, (c) is a partially expanded view. (A) is a top view of the lighting fixture which concerns on Example 7 of this invention, (b) is a half-cut side view. The half-cut sectional view of the lighting fixture which concerns on Example 8 of this invention. (A) is a top view of the lighting fixture which concerns on Example 9 of this invention, (b) is a half-cut side view. (A) is a top view of the lighting fixture which concerns on Example 10 of this invention, (b) is a half-cut side view. (A) is a top view of the lighting fixture which concerns on Example 11 of this invention, (b) is a half-cut side view. (A) is a top view of the lighting fixture which concerns on Example 12 of this invention, (b) is a half-cut side view. (A) is sectional drawing of the reflective mirror in Example 12 same as the above, (b) is an external view of a reflective mirror. (A), (b), (c), and (d) are external views of the reflecting mirrors in Examples 9, 10, 11, and 12, respectively.

Hereinafter, a lighting apparatus according to an embodiment of the present invention will be described with reference to the drawings.
<Example 1>
Fig.1 (a) (b) shows the structure of the lighting fixture which concerns on Example 1, (c) expands and shows a part. The luminaire is mounted on a lamp-equipped main body (hereinafter referred to as a vessel) 1 as a frame, a lamp socket 2 provided on a lamp socket mounting surface on the inner top surface of the vessel 1, and a lamp socket 2. A fluorescent lamp (referred to as a lamp) 3 and a reflecting mirror 4 attached to the body 1 and covering the entire periphery of the lamp 3. The housing 1 covers the vicinity of the lamp base 3a (lamp base portion) of the lamp socket 2 and the lamp 3 so that air flow does not occur between the inside and outside of the housing 1 and around the entire periphery of the lamp base 3a. A close proximity portion A is formed. There are no heat radiating holes in the vicinity of the lamp cap portion 3a and the lamp socket 2 of the housing 1 and there is no convection of air from the inside of the reflecting mirror 4, that is, from the lower surface of the fixture in the lamp chamber. I am trying not to.

  The container 1 and the reflecting mirror 4 are made of aluminum die casting. The reflecting mirror 4 is a trumpet-shaped cylinder having a large diameter on the lower end opening side, and the upper edge of the reflecting mirror 4 is fixed to the lower end edge of the celestial tube type of the body 1 with a screw 5. The body 1 and the reflecting mirror 4 may be integrally made of aluminum die casting. A ballast mounting / equipment mounting plate 1a (referred to as a mounting plate) is fixed to the top surface of the cylindrical body of the vessel body 1, and a frame 1b is extended from the mounting plate 1a in a gate shape. The lower end of the reflecting mirror 4 is coupled to the lower end thereof. The mounting plate 1a and the frame 1b constitute a frame together with the container 1. The lighting fixture is fixed to the mounting hole of the ceiling 6 by a fixture mounting spring member 7 provided near the lower end of the frame 1b. A ballast 8 is attached to the extending portion of the mounting plate 1a.

  According to the present embodiment, since the proximity portion A of the container 1 is provided so as to surround the lamp base portion 3a, the heat conduction is good and the temperature rise of the lamp base portion due to the lamp light heat can be suppressed. In the case of a fluorescent lamp, the temperature at the coldest spot of the lamp is reduced due to the temperature drop of the lamp base, which increases the luminous efficiency of the lamp and the efficiency of the appliance.

<Example 2>
2 (a) and 2 (b) show a configuration of a lighting fixture according to the second embodiment, and (c) shows an enlarged part thereof. The same members as those described above are denoted by the same reference numerals (hereinafter the same). The lighting fixture according to the second embodiment is a type in which the lamp 3 is disposed sideways, and the body 1 as a frame includes a mounting plate 1a, a socket cover 1c, a periphery of the lamp socket 2 and the lamp base portion 3a. And a proximity portion A that is close to the lamp cap portion 3a. Proximity part A is formed in a horizontally-facing cylinder type, and its top surface is attached to socket cover 1c. The reflecting mirror 4 is fixed to the mounting plate 1a. The socket cover 1c covers the gap between the reflecting mirror 4 and the proximity portion A. Thereby, the air flow in the container 1 near the lamp cap portion 3a hardly occurs. Also in this embodiment, the same effects as those of the first embodiment can be obtained.

<Example 3>
3A and 3B show the configuration of the lighting fixture according to the third embodiment, and FIGS. 4A and 4B show the configuration of the reflecting mirror. The lighting fixture of the third embodiment includes a plurality (three in this case) of lamp sockets 2. The body 1 includes a reflecting mirror 4 that integrally covers the lamps 3 mounted in the plurality of lamp sockets 2 and a proximity portion that is formed in a cylindrical shape for each of the plurality of lamp sockets 2 and is close to the periphery of each lamp socket 2. A is provided and is integrally made of aluminum die casting. The unit 1 is fixed to a mounting plate 1a by a mounting screw 5 with a bracket 1f interposed. The upper end of the cylindrical proximity portion A is in contact with the mounting plate 1a so as to be able to conduct heat, and the air flow in the container 1 near the lamp cap portion 3a hardly occurs. Also in this embodiment, the same effects as those of the first embodiment can be obtained.

<Example 4>
FIG. 5 shows a configuration of a lighting apparatus according to the fourth embodiment. The lighting fixture of the second embodiment uses a halogen lamp as the lamp 3, and the body 1 includes an attachment plate 1a provided with a lamp socket 2, a cylindrical frame 1b, and an umbrella forming a lamp chamber. And the reflecting mirror 4 in the form of a ring. The reflecting mirror 4 has a lower end coupled to the lower end of the frame 1b, and a front glass 11 is attached to the opening. The upper end portion of the reflecting mirror 4 constitutes a proximity portion A adjacent to the lamp cap portion 3a. Reference numeral 12 denotes a terminal block. With this configuration, heat of the lamp cap portion 3a is conducted and dissipated through the proximity portion A, and air flow in the container 1 near the lamp cap portion 3a hardly occurs. Also in this embodiment, the same effects as those of the first embodiment can be obtained.

<Example 5>
6 (a) and 6 (b) show a main configuration of a lighting fixture according to the fifth embodiment. In the second embodiment, the difference from the first embodiment is that the proximity portion A of the vessel body 1 has a cylindrical shape along the periphery of the lamp base portion 3a, and the vessel body 1, the lamp socket 2 and the lamp base portion 3a During this, the silicon packing 13 having good thermal conductivity was inserted or filled. Since other configurations are the same as those of the first embodiment, the overall diagram is omitted. With this configuration, the lamp base portion 3a and the lamp socket 2 are brought close to the proximity portion A of the container body 1 through the silicon packing 13 to increase heat conduction, and the air in the container body 1 near the lamp base portion 3a. Almost no flow occurred. Also in the present embodiment, the temperature of the lamp cap portion 3a can be reduced more effectively.

<Example 6>
FIGS. 7A, 7B, and 7C show the configuration of the main part of the lighting fixture according to the sixth embodiment. In the sixth embodiment, the difference from the first embodiment is that the proximity portion A of the container 1 is a stepped cylinder along the periphery of each of the lamp cap portion 3 a and the lamp socket 2. . Here, since the diameter of the lamp cap portion 3a is larger than that of the lamp socket 2, the proximity portion A has a stepped shape in which the upper lamp socket 2 side has a small diameter and the lower lamp cap portion 3a side has a large diameter. ing. Further, as for the height dimension of the proximity part A, the small diameter part is almost the height dimension of the lamp socket 2, and the large diameter part is the height dimension of the lamp base part 3a. Also in this embodiment, the same effects as those of the first embodiment can be obtained.

<Example 7>
8A and 8B show the configuration of a lighting fixture according to the seventh embodiment. In the seventh embodiment, the difference from the first embodiment is that the body 1 is made of aluminum die-cast integrally with the reflecting mirror 4 and covers the lamp base portion 3a and the lamp socket 2 so as to cover the lamp base portion. And having a proximity part A close to 3a. An enlarged portion A2 having an outer shape larger than the portion A1 of the lamp cap portion 3a is provided above the lamp cap portion 3a of the vessel body 1. Also in this configuration, the heat of the lamp cap portion 3a is conducted to the proximity portion A, and the air flow in the vessel body 1 is hardly generated in the vicinity of the lamp cap portion 3a. Is obtained.

<Example 8>
FIG. 9 shows a configuration of a lighting apparatus according to the eighth embodiment. In the eighth embodiment, the difference from the seventh embodiment is that the proximity portion A of the aluminum die-cast body 1 is composed of a portion A1 close to the lamp cap portion 3a and an enlarged portion A2 along the lamp socket 2. It is to be made. The enlarged portion A2 has an inner peripheral surface that is close to the lamp socket 2 and an outer peripheral surface that has a larger diameter, and is thick in this example. Even in this configuration, the air flow in the container 1 hardly occurs in the vicinity of the lamp cap portion 3a, and the same effect as the above embodiment can be obtained.

<Example 9>
10A and 10B show the configuration of a lighting fixture according to the ninth embodiment. The lighting fixture of Example 9 was made of aluminum die-casting integrally with the three lamp sockets 2 and the reflecting mirror 4 covering the lamp 3 attached to the lamp socket 2 as in Example 3 described above. The container body 1 is provided, and the container body 1 includes a cylindrical proximity portion A adjacent to each lamp cap portion 3a. The difference from the third embodiment is that these proximity portions A are connected to each other by an integrally formed wall member B. The wall member B is on the plane connecting the centers of adjacent portions A adjacent to each other. Further, the proximity portion A of the container 1 and the upper end portion of the wall member B are in contact with the mounting plate 1a so as to be able to conduct heat. The proximity portion A prevents the air flow in the body from occurring in the vicinity of the lamp cap portion 3a. The body 1 integrated with the aluminum die-casting reflecting mirror 4 is configured as shown in FIG.

  With this configuration, the temperature distribution of the heat at the center of each lamp that has risen by a plurality of lamps can be made uniform, and the temperature rise of the lamp cap 3a can be reduced. The present embodiment is not limited to the configuration of three lamps and can be applied to a configuration of two or more lamps. The same is true for the embodiments having a plurality of lamps described below.

<Example 10>
FIGS. 11A and 11B show the configuration of a lighting fixture according to the tenth embodiment. The difference between the tenth embodiment and the ninth embodiment is that the portion of the container 1 forming the plurality of proximity portions A is enlarged in diameter, and the large-diameter portion is a mounting plate 1a that is a lamp socket mounting surface. The contact area is increased to increase heat conduction. The container 1 integrated with the reflecting mirror 4 made of aluminum die casting is configured as shown in FIG. With this configuration, the temperature rise of the lamp cap 3a can be reduced.

<Example 11>
FIGS. 12A and 12B show the configuration of the lighting fixture according to the eleventh embodiment. Example 11 is a modification of Example 9 described above, and a plurality of wall members C connecting a plurality of cylindrical proximity portions A are different from the above. Each of the wall members C has one end extending from the vicinity of the container body of one adjacent portion, and the other end connected to the outer periphery of the adjacent adjacent portion. The container 1 integrated with the reflecting mirror 4 made of aluminum die casting is configured as shown in FIG. With this configuration, the temperature distribution of the plurality of proximity portions A can be made uniform, and the temperature rise of the lamp cap portion 3a can be reduced.

<Example 12>
FIGS. 13A and 13B show the configuration of a lighting fixture according to Example 12, and FIG. 14 shows the configuration of a reflecting mirror. This embodiment 12 is still another modified example of the above-described embodiment 9, and conducts heat in contact with the mounting plate 1a, which is the lamp socket mounting surface, in the space on the container body side of the plurality of adjacent portions A. The heat conduction part D to be provided was provided. The heat conducting portion D is integrally formed as a container 1 together with the proximity portion A and the reflecting mirror 4. The container 1 integrated with the reflecting mirror 4 made of aluminum die casting is configured as shown in FIG. With this configuration, similarly to the above, the temperature distribution of the plurality of adjacent portions A can be made uniform, and the temperature rise of the lamp cap portion 3a can be reduced.

  The present invention is not limited to the configuration of the above embodiment, and various modifications can be made without departing from the spirit of the invention. For example, the present invention is applicable to a single-cap lamp having a cap portion between a lamp bulb and a socket such as a halogen bulb, a fluorescent lamp, and an HID lamp.

  In particular, in the case of amalgam-type fluorescent lamps, when the balance between air supply and ventilation by the air conditioner installed in the room and the ventilation fan is lost, air convection occurs in the lighting fixture, and it is provided in the lamp base. The amalgam portion thus formed is rapidly cooled, resulting in a significant temperature drop, and the luminous flux of the fluorescent lamp is reduced. In order to prevent this, it is necessary to eliminate the occurrence of convection in the body. However, simply sealing the body 1 or attaching a panel on the front surface greatly increases the lamp amalgam temperature, and the luminous efficiency of the appliance. Becomes worse. In that respect, by adopting the configuration of the present invention, the temperature of the lamp cap portion can be reduced, which is effective in improving the luminous efficiency of the fixture.

1 Instrument body (container)
1a Mounting plate 2 Lamp socket 3 Fluorescent lamp (lamp)
3a Lamp cap part 4 Reflector A Proximity part A2 Enlarged part B, C Wall member D Heat conduction part

Claims (3)

A lighting fixture comprising a fixture body (referred to as a container) provided with a lamp socket, a lamp having a lamp cap mounted on the lamp socket, and a reflecting mirror provided in the fixture and surrounding the lamp. In
Covering the vicinity of the lamp socket with a container to the extent that air flow inside and outside the container does not substantially occur, and forming a proximity part close to the vicinity of the lamp base part on the container,
The proximity part is provided so as to surround the periphery of the lamp base part,
A plurality of the lamp sockets, and the body integrally covers the lamps mounted in the plurality of lamp sockets, and the proximity portion of the body is formed in a cylindrical shape for each of the plurality of lamp sockets, A lighting fixture characterized in that a plurality of cylindrical proximity portions are connected to each other by a wall member.   Each of the plurality of wall members that connect the plurality of cylindrical proximity portions is configured such that one end side extends from the vicinity of the container body of one proximity portion and the other end side is connected to the outer periphery of the adjacent proximity portion. The lighting fixture according to claim 1. A lighting fixture comprising a fixture body (referred to as a container) provided with a lamp socket, a lamp having a lamp cap mounted on the lamp socket, and a reflecting mirror provided in the fixture and surrounding the lamp. In
Covering the vicinity of the lamp socket with a container to the extent that air flow inside and outside the container does not substantially occur, and forming a proximity part close to the vicinity of the lamp base part on the container,
The proximity part is provided so as to surround the periphery of the lamp base part,
A plurality of the lamp sockets, and the body integrally covers the lamps mounted in the plurality of lamp sockets, and the proximity portion of the body is formed in a cylindrical shape for each of the plurality of lamp sockets, The lighting fixture characterized by providing the heat conduction part which contact | abuts to a lamp socket attachment surface and conducts heat in the space | interval center side space of a some proximity part.

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