JP2005085505A - Barn door - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a barn door for spotlight which condenses more effectively light from a light source and is capable of adjusting the light from condensing to diffusion, especially a barn door for spotlight suitable for using as a spotlight with fluorescent lamp as the light source. <P>SOLUTION: The barn door is used for a spotlight equipped with a reflector 3 having a nearly semi-spherical face and a fluorescent lamp 2 arranged at the bottom center of a semi-spherical face mirror, and comprises reflecting plates 4a of which inner face is formed of a mirror face. The reflecting plates 4a are fitted to the periphery face 8 of the aperture of the reflector 3 detachably and is formed in a circular cone cylinder shape with a diameter of the aperture circle at the top end of the reflecting plates 4a larger than that of the reflector 3. Further, the top ends of the reflecting plates 4a are capable of turning toward the direction to make the diameter of the aperture circle at the top end larger centered on the periphery face 8 of the aperture of the reflector 3, and the reflecting plates reflect the light from the fluorescent lamp 2 by any angle and can change it from condensing to diffusion freely. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a spotlight bander that is detachably attached to a spotlight used for television lighting or the like, and adjusts the range and the amount of light emitted in front of a lamp.

  Conventionally, a bander that is detachably attached to a spotlight used for television lighting or the like has a rectangular light-shielding plate 10 that is generally disposed on an opening peripheral side surface 41 of a lamp body 40 as shown in FIG. Is formed by a tapered light shielding plate 20 having a tapered shape and a frame 30 attached to the peripheral surface 41 of the opening and supporting the rectangular light shielding plate 10 and the tapered light shielding plate 20 (for example, Patent Document 1).

Such bander changes the opening area formed by opening and closing the rectangular light-shielding plate 10 and the tapered light-shielding plate 20, and adjusts the range and the amount of light to be irradiated.
Japanese Patent Laid-Open No. 11-224508 (page 3, FIG. 5)

  Incidentally, in recent years, fluorescent lamps have been adopted instead of conventional incandescent lamps in television lighting and the like for the purpose of reducing power consumption and heat generation. Fluorescent lamps have a light emitting area that is larger than incandescent lamps due to their structure, so when using fluorescent lamps as spotlights for TV lighting, etc. In many cases, it is required to irradiate an object to be illuminated.

  However, when the conventional bander as described above is used to adjust the range and amount of light emitted by the spotlight using a fluorescent lamp as the light source, the surface of the bander is painted in black or the like. There is a problem that the light from the fluorescent lamp cannot be collected efficiently.

  Furthermore, as shown in FIG. 17, the rectangular light shielding plate 10 and the tapered light shielding plate 20 except for the case where the tip end portion of the rectangular light shielding plate 10 and the tip portion of the tapered light shielding plate 20 are brought into contact with each other to narrow the opening area. Since a gap is formed between the two and the light leaks from the gap, there is a problem that the light from the fluorescent lamp cannot be sufficiently collected.

  In addition, when the light from the fluorescent lamp is efficiently collected by the reflector (mirror) provided in the lamp body, the reflector is forced to increase in size, and the size and weight of the lamp body itself increases drastically. There was a problem that the transportation and storage of the lamp became inconvenient.

  Therefore, the present invention has been made in view of the above points, and more particularly, a spotlight bander capable of condensing light from a light source more efficiently and adjusting from condensing to diffused light, particularly a fluorescent lamp. An object of the present invention is to provide a spotlight bander suitable for use in a spotlight having a light source as a light source.

  In order to solve the above-described problems, the present invention has the following features. First, a first feature of the present invention is a spotlight including a hemispherical mirror (reflector 3) having a substantially hemispherical surface, and a light source (for example, a fluorescent lamp 2) disposed at the bottom center of the hemispherical mirror. The bander used is provided with a reflecting portion (reflecting portion 4g) whose inner surface is formed by a mirror surface, and the reflecting portion is detachably attached to the opening peripheral side surface (opening peripheral side surface 8) of the hemispherical mirror, The gist of the present invention is a bander formed by forming a conical cylinder shape in which the opening circle diameter at the tip of the reflecting portion is larger than the opening circle diameter of the hemispherical mirror.

  According to such a feature, since the inner surface of the reflecting portion is formed as a mirror surface, light can be condensed while suppressing attenuation of light from the light source as much as possible.

  In addition, according to this feature, the bander is detachably attached to the opening peripheral side surface of the spotlight, which is convenient when the bander and the spotlight are transported.

  According to a second feature of the present invention, in the first feature of the present invention, the reflecting portion is composed of a plurality of reflecting plates (reflecting plates 4a), and each of the reflecting plates has a tip of the reflecting plate. Is rotatable in the direction of increasing the diameter of the opening circle around the opening peripheral side surface (opening peripheral side surface 8), and reflects light from the light source at an arbitrary angle to change from condensing to diffused light. The gist is to make it.

  According to this feature, since the reflector can be rotated in the direction of increasing the diameter of the opening circle, the range and the amount of light to be irradiated can be adjusted according to the object to be illuminated.

  Furthermore, according to this feature, since the conical cylinder shape is formed by the plurality of reflecting plates, each reflecting plate can be compared with the conventional bander even when the reflecting plate is rotated in the direction of increasing the diameter of the opening circle. A gap formed between the plates can be narrowed, and light leaking from the gap can be reduced.

  In addition, according to this feature, since the band arm is composed of a plurality of reflecting plates, the reflecting plates can be folded or stacked, so that the band arm can be more easily transported and accommodated.

  A third feature of the present invention is the bandar used in the spotlight provided with the compact fluorescent lamp, for example, FHT42EX-L manufactured by OSRAM as the light source in the first or second feature of the present invention. Is the gist.

  According to such characteristics, it is required to collect light more efficiently than incandescent lamps, and it is characterized by high efficiency, power saving, and low heat generation, and the opportunities for adoption in television lighting and the like increase. A bandar suitable for a fluorescent spotlight can be provided.

  According to the present invention, the light from the light source is collected more efficiently and can be adjusted from the light collection to the diffused light, and is particularly suitable for a spotlight using a fluorescent lamp as a light source. A spotlight band arm can be provided.

(Configuration of the bander according to the present embodiment)
Embodiments of the present invention will be described with reference to the drawings. First, the appearance of the spotlight to which the bander and the bander according to this embodiment are attached will be described.

  FIG. 1 is a perspective view of a spotlight including a bander 4 according to the present embodiment. FIG. 2 is a front view and a left side view of the spotlight including the bander 4. 3 to 6 respectively show a front view, a rear view, a plan view, and a perspective view of the band arm 4.

  FIG. 7 is a view showing a state where the reflecting plate 4a constituting the band arm 4 is half open and fully open.

  8 to 10 respectively show a rear view, a plan view, and a bottom view of the spotlight including the bander 4. FIG. 11 is a perspective view of a spotlight including a bander when the reflector 4a constituting the bander 4 is fully opened. Further, FIG. 12 is a view showing a state where the band arm 4 is detached from the spotlight.

  Next, the configurations of the bander 4 and the spotlight to which the bander 4 is attached will be described.

  As shown in FIGS. 1 and 2, the spotlight according to the present embodiment includes a lamp body 1, a fluorescent lamp 2, a reflector 3, and an arm 5.

  The fluorescent lamp 2 is arranged at the center of the bottom of the reflector 3 having a substantially hemispherical surface. The fluorescent lamp 2 is a so-called compact fluorescent lamp, and for example, OSRAM FHT42EX-L (42W) can be used.

  The reflector 3 is constituted by a mirror having a substantially hemispherical surface with a mirror surface formed, and is accommodated in the lamp body 1. The substantially hemispherical surface of the reflector 3 includes shapes such as an ellipsoid, a shell, and a paraboloid.

  The bander 4 is composed of a reflecting plate 4a, a support metal fitting 4b, a frame 4c, and a bolt 4d.

  The reflecting plate 4a is disposed on the opening peripheral side surface 8 of the lamp body 1 in which the reflector 3 is accommodated. In the present embodiment, the reflecting plate 4a is configured to surround the opening periphery of the lamp body 1 using the four reflecting plates 4a. The Note that the number of the reflection plates 4a may be other than four. For example, the reflection plates 4a may be configured by using eight more divided reflection plates.

  Further, the inner surface of each reflector 4 a forming a conical cylinder shape is mirror-finished so as to reflect light directly reaching from the fluorescent lamp 2 or light reaching via the reflector 3. . As the reflecting plate 4a, for example, stainless steel can be used.

  Further, the reflection plate 4a is attached to the frame 4c by a support metal fitting 4b. Specifically, the support metal fitting 4b is configured such that one end is fixed to the reflection plate 4a by a bolt 4d, and the other end is configured such that the angle of the reflection plate 4a can be freely changed across the frame 4c.

  In addition, as shown in FIG. 2A, a fluorescent lamp 2 is disposed at the bottom center of the reflector 3. The opening circle diameter formed by the tips of the four reflecting plates 4a is larger than the opening circle diameter of the reflector 3 (lamp body 1). That is, as shown in FIG. 1A and FIG. 2B, the shape of the bander formed by the reflecting plate 4a is substantially conical.

  In addition, the dimensions of the bander and the spotlight according to the present embodiment are the A section shown in FIG. 2A, that is, the opening diameter of the lamp body 1 is approximately 226 mm, and the B section shown in FIG. The bander constituted by the reflector 4a and the frame 4c is approximately 160 mm, the C section, that is, the lamp body 1 is approximately 300 mm, and the D section, that is, the opening circle diameter formed by the tip of the reflector 4a is approximately 337 mm.

  Further, as shown in FIG. 2 (b), a bander attaching / detaching screw 6 is provided at the upper end of the lamp body 1, and a frame 4c is engaged at four locations on the top, bottom, left and right of the lamp body 1. A locking bracket 7 is provided to stop.

  The locking bracket 7 that is fastened together with the bander attaching / detaching screw 6 becomes free by loosening the bandar attaching / detaching screw 6, and is provided on the frame 4c from above, below the tip of the lamp body 1 and on the left and right. The bander 4 is configured to be detachably attached to the spotlight 1 by sliding it to a position where it is locked by the locking metal fitting 7.

  In addition, the locking fitting 7 is bent inward at a certain distance from the opening peripheral side surface 8 of the lamp body 1 so that the frame 4c can be locked.

  As shown in FIGS. 7A and 7B, the bander 4 can rotate the reflecting plates 4a of the bander 4 to the fully opened state around the support fitting 4b that supports the reflecting plate 4a.

  As shown in the figure, the frame 4c includes a square frame to which the support metal fitting 4b is attached and a circular frame provided inside the square formed by the square frame.

  The diameter of the circular frame is substantially the same as the diameter of the opening of the lamp body 1, that is, the reflector 3, and the reflecting plate 4 a attached to the rectangular frame is positioned slightly outside the opening peripheral side surface 8. ing. By adopting such a shape, even when the reflecting plate 4a is rotated, the reflecting plate 4a can be freely rotated without interfering with the lamp body 1.

  As shown in FIGS. 7A and 7B, the reflecting plate 4a can be rotated to an arbitrary position, and the light emitted from the fluorescent lamp 2 can be changed according to the distance from the object to be illuminated. It is possible to perform so-called focusing that adjusts the range and the amount of light, that is, irradiates more light far away and distributes less light on the near side.

  Further, as described above, the bander 4 forms a conical cylindrical shape by the four reflecting plates 4a. Therefore, as shown in FIG. The gap formed between the reflecting plates 4a can be narrowed as compared with the conventional bander shown in FIG. That is, coupled with the fact that the inner surface of the reflecting plate 4a is formed into a mirror surface, even when the reflecting plate 4a is in a half-open state, the range and amount of light to be irradiated can be reduced while efficiently collecting the light from the fluorescent lamp 2. Can be adjusted.

  Next, with reference to FIG. 13, the reflection state of light when the reflection plate 4a is in the fully open state and the half open state will be described. As shown in FIG. 13A, when the reflecting plate 4a is fully opened, the light beam from the fluorescent lamp 2 (arrow in the figure) is scattered without being reflected by the reflecting plate 4a. In such a case, the irradiated object is irradiated with the direct light from the fluorescent lamp 2 and the light reflected by the reflector 3.

  On the other hand, as shown in FIG. 13B, when the reflecting plate 4a is in a half-open state, the light flux from the fluorescent lamp 2 is reflected by the reflecting plate 4a so as to travel forward. That is, in such a case, the irradiated object is irradiated with direct light from the fluorescent lamp 2, light reflected by the reflector 3, and light reflected by the reflecting plate 4a. That is, it is possible to increase the amount of light irradiated to the irradiated object.

  When the bander 4 having the above-described dimensions and the fluorescent lamp 2 are used, the reflecting plate 4a shown in FIG. 13A is fully opened, and the reflecting plate 4a is completely closed as shown in FIG. In comparison with the case where the reflection plate 4a is completely closed, the amount of light reaching the irradiated object when the reflection plate 4a is completely closed can be approximately twice as large as that obtained when the reflection plate 4a is fully opened. That is, the amount of light for one stop can be changed by rotating the reflecting plate 4a.

  FIG. 14 shows a reflector that is the reflector having the same size and shape as the incandescent lamp 2 ′ and the reflector shown in FIG. 13 for comparison with the reflected state of the light from the fluorescent lamp 2 shown in FIG. 3 shows the traveling direction of the luminous flux from the incandescent lamp 2 'in the spotlight using the 3. As shown in FIG. 14, the incandescent lamp 2 ′ has a light emitting area smaller than that of the fluorescent lamp 2, so that the luminous flux from the incandescent lamp 2 ′ is scattered without being reflected by the reflector 3. The luminous flux is less than that of the fluorescent lamp 2 shown in FIG.

  That is, in the case of the fluorescent lamp 2, compared to the incandescent lamp 2 ′, the luminous flux scattered by the reflector 3 alone is increased, but by using the bander 4, the luminous flux from the fluorescent lamp 2 is reflected in the forward direction, The amount of light irradiated to the irradiated object can be increased.

  FIG. 15 shows a state in which the bander 4 is removed from the lamp body 1 and each reflector 4a is folded inward. As shown in the figure, since the bander 4 can be easily detached from the lamp body 1 and can be folded, it is convenient for transportation and storage. Moreover, in this embodiment, although it has set it as the form which fixes the reflecting plate 4a to the support metal fitting 4b using the volt | bolt 4d, it may replace with the volt | bolt 4d and an easily detachable hook etc. may be used. Since the reflecting plate 4a can be removed from the support fitting 4b and stacked, it is further convenient for transportation and storage.

(Operation and effect of the bander according to this embodiment)
As mentioned above, although embodiment of this invention was described, according to the bander 4 which concerns on this embodiment, since the inner surface of the reflecting plate 4a is mirror-formed, it collects light, suppressing attenuation | damping of the light from the fluorescent lamp 2 as much as possible. can do.

  Moreover, according to this embodiment, since the bander 4 was detachably attached to the opening peripheral side surface 8 of the lamp body 1, it is convenient when the bander 4 and the lamp body 1 are transported.

  Furthermore, according to this embodiment, since the reflecting plate 4a can be rotated in the direction of increasing the diameter of the opening circle, it is possible to adjust the range and the amount of light to be irradiated according to the object to be illuminated.

  Moreover, according to this embodiment, since the conical cylinder shape is formed by the reflecting plate 4a, each reflecting plate 4a is more reflective than the conventional bander even when the reflecting plate 4a is rotated in the direction of increasing the diameter of the opening circle. The gap formed between the plates 4a can be narrowed, and light leaking from the gap can be reduced.

  Furthermore, according to this feature, since the bander 4 is composed of the plurality of reflecting plates 4a, the reflecting plate 4a can be folded or stacked, so that the bander 4 can be transported and accommodated more conveniently.

  That is, according to this embodiment described above, a bander suitable for a spotlight having a hemispherical mirror using a fluorescent lamp that is required to collect light more efficiently than an incandescent lamp is provided. Can do.

  However, the scope of application of the present invention is not limited to a spotlight using a fluorescent lamp as a light source, but can of course be applied to a spotlight using an incandescent lamp as a light source.

(Example of change)
The bander 4 according to the present embodiment described above can be modified as shown in FIG. As shown in FIG. 16A, the bander 4 ′ according to the present modification includes a reflecting portion 4g having an inner surface formed by a mirror surface, and the reflecting portion 4g includes the reflector 3 as shown in FIG. It is characterized in that it is detachably attached to the opening peripheral side surface 8 and has a conical cylinder shape in which the opening circle diameter at the tip of the reflecting portion 4g is larger than the opening circle diameter of the reflector 3.

  According to the bander 4 ′ according to the present modified example, as with the bander 4 according to the present embodiment described above, it is possible to collect light while suppressing attenuation of light from the light source as much as possible, and to scatter light in an unnecessary direction. Compared with the bander 4, the structure can be simplified and a bander that contributes to a reduction in manufacturing cost can be provided while reducing and providing convenience such as when the bander and the spotlight are transported.

The perspective view of the spotlight containing the bander which concerns on embodiment of this invention. The front view and left view of the spotlight containing the bander which concerns on embodiment of this invention. The front view of the bander which concerns on embodiment of this invention. The rear view of the bander which concerns on embodiment of this invention. The top view of the bander which concerns on embodiment of this invention. The perspective view of the bander which concerns on embodiment of this invention. The figure which shows the state which made the reflective plate of the bander which concerns on embodiment of this invention half open and full open. The rear view of the spotlight containing the bander which concerns on embodiment of this invention. The top view of the spotlight containing the bander which concerns on embodiment of this invention. The bottom view of the spotlight containing the bander which concerns on embodiment of this invention. The perspective view of the spotlight containing a bander when the reflecting plate of the bander which concerns on embodiment of this invention is made into a full open. The figure which shows the spotlight which removed the bander which concerns on embodiment of this invention. The figure which shows the reflective state of the light in case the reflection plate of the bander which concerns on embodiment of this invention is made into full open and half open. The figure which shows the advancing direction of the light in the case of using an incandescent lamp as the light source of a spotlight. The figure which shows the state which folded the reflector of the bander which concerns on embodiment of this invention. The perspective view of the spotlight containing the bander which concerns on the example of a change of this invention. The figure which shows the conventional band art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Lamp body, 2 ... Fluorescent lamp, 2 '... Incandescent lamp, 3 ... Reflector, 4, 4' ... Bander, 4a ... Reflector plate, 4b ... Support metal fitting, 4c ... Frame, 4d ... Bolt, 4g ... Reflection part, DESCRIPTION OF SYMBOLS 5 ... Arm, 6 ... Band-ar attachment-and-detachment screw, 7 ... Locking metal fitting, 8 ... Opening peripheral side surface, 10 ... Rectangular light-shielding plate, 20 ... Tapered light-shielding plate, 30 ... Frame, 40 ... Lamp body, 41 ... Opening peripheral side surface

Claims (3)

A bander used for a spotlight comprising a hemispherical mirror having a substantially hemispherical surface, and a light source disposed at the bottom center of the hemispherical mirror,
The inner surface includes a reflecting portion formed by a mirror surface,
The reflection part is detachably attached to the opening circumferential side surface of the hemispherical mirror,
A bander having a conical cylindrical shape in which an opening circle diameter at a tip of the reflecting portion is larger than an opening circle diameter of the hemispherical mirror.   The reflecting portion is composed of a plurality of reflecting plates, and each of the reflecting plates is rotatable in a direction in which the tip of the reflecting plate increases the opening circle diameter of the tip around the opening peripheral side surface. 2. The bander according to claim 1, wherein light from the light source is reflected at an arbitrary angle to change from light collection to light scattering.   The bander according to claim 1 or 2, wherein the light source is used in the spotlight including a compact fluorescent lamp.

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