JPH07120486B2 - Lighting equipment - Google Patents

Description

TECHNICAL FIELD The present invention relates to a lighting device which is used by being arranged on a ceiling, a wall surface, a desk or the like in an office, a home or the like.

[Prior Art] Conventionally, a lighting device of this type is generally one in which a light source such as a fluorescent lamp is attached to a device body provided with a socket for power feeding, and the light source is provided with a transparent or translucent fixed cover. There are quite a few that I covered.

[Problems to be Solved by the Invention] However, such an illuminating device merely causes the light emitted from the light source to be projected within a certain peripheral range, and the amount of projection is adjusted by the number of light sources to be turned on. It is well known that this is done only by selecting.

By the way, recently, research on office comfort has been extensively conducted, and improvement of comfort not only involves the maintenance of space fixtures such as desks, chairs and partitions, but also air conditioning, sound, smell, light, etc. It is pointed out that optimization is important. In particular, regarding light, it is important to have a deep relationship with each person's intellectual production activities and to take individual measures according to their individuality and work content.

However, among the conventional lighting devices, the lighting device mounted on the ceiling or the wall surface uniformly illuminates a predetermined area with a constant light amount, and the light emitting amount and the light projecting direction are individually controlled. Can not be adjusted to. Also, with regard to the lighting device such as a tuftlight installed on the desk of each person, it is possible to obtain a desired lighting condition to some extent by changing the installation position or turning on / off the lighting, but the amount of light projected is slightly different. It is not possible to adjust the lighting conditions to optimal, and it is difficult to individually set the optimal lighting conditions for intellectual activities.

Further, in recent offices, a large number of display devices such as computers and word processors have been installed along with the progress of OA, but the problem that ceiling lights and the like are reflected on the screen frequently occurs. Also regarding this issue,
The conventional lighting device described above cannot deal with the problem.

The present invention aims to solve all the above problems.

[Means for Solving the Problems] The present invention adopts the following configuration in order to achieve such an object.

That is, the illuminating device according to the present invention includes a light source, a transparent or semi-transparent cover arranged in the outer peripheral region of the light source, and a cover holding unit that holds the cover rotatably in the circumferential direction. It is characterized in that the cover is formed with patterned opaque surfaces with different disposition densities in the circumferential direction. Further, a mirror film or a half mirror film whose inner surface side serves as a reflecting surface may be provided. It is preferable that the mirror film or the half mirror film is arranged in a pattern so that the arrangement density thereof changes in the circumferential direction.

The brightness can be adjusted more variously as a light source, a transparent or semi-transparent inner cover arranged in the outer peripheral area of the light source, and a relatively rotatable outer fit on the outer circumference of the inner cover. A transparent or semi-transparent outer cover, and a cover holding means for holding at least one cover at a predetermined position. Each cover is provided with a polarization filter having a substantially constant width along the axial center. The polarization direction may be different from each other.

As another aspect, a light source, a transparent or semi-transparent inner cover arranged in the outer peripheral area of the light source, and a transparent or semi-transparent outer fitting of the inner cover so as to be relatively movable in the axial direction. Outer cover and cover holding means for holding at least one cover at a predetermined position, each cover having an opaque surface substantially orthogonal to the axis formed in a horizontal stripe pattern, and at least one cover The lateral dimension of the opaque surface formed on the tape may be gradually changed in the circumferential direction.

The light source is typically a straight tube type having plugs at both ends, but may be a cantilever type having a plug at one end. For a straight pipe type, it is preferable to use a cylindrical cover whose both ends are open, and for a cantilever type, a cylindrical cover with a bottom is preferable because of its structure.

It is desirable that the cover has a perfect cylindrical shape in order to secure strength, but if it is desired to attach / detach the light source with the cover still attached, a continuous opening through which the light source can pass. It may have a C-shaped cross section having a portion.

[Operation] With such a configuration, in the case of a single cover, by rotating the cover with respect to the light source, it is possible to appropriately adjust the projection state for a specific position. . In particular, in the present invention, the patterned opaque surface and the patterned mirror film or the half mirror film are formed with different arrangement densities in the circumferential direction, so that the projection can be performed without complicating the structure. The light condition can be adjusted steplessly and finely.

With respect to the one having a pair of inner and outer covers, it is possible to perform more various light emission adjustments by relatively rotating the both covers or moving them in the axial direction. In particular, in the case where the deflection directions of the deflection filters are different from each other, the ratio of the area without the polarization filter, the area with one polarization filter, and the area with the two polarization filters overlapping each other to perform the light shielding function is covered. Can be freely changed by rotating the. Further, in the one in which the width dimension of the opaque surface formed in a horizontal stripe shape is gradually changed in the circumferential direction, the outer cover is slid in the axial direction with respect to the inner cover, so that the overlapping region of the opaque surfaces can be changed. The area ratio of the light-shielding portion and the light-transmitting portion changes steplessly. Then, the width of the translucent portion formed between the opaque surfaces gradually changes in the circumferential direction. Therefore, by relatively moving or rotating the inner cover and the outer cover in the axial direction and the circumferential direction, the brightness for a specific position can be finely adjusted in a wide range.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

Example 1 (FIGS. 1 to 3) A lighting device of this example is a straight tube fluorescent lamp 1 serving as a light source.
And a cover holding means 3 for holding the cover 2 rotatably in the circumferential direction. The cover 2 is provided on the outer peripheral area of the fluorescent lamp 1, and the cover 2 has an opaque pattern. Forming surface 221.

More specifically, the fluorescent lamp 1 is an ordinary one having plugs 11 at both ends, and these plugs 11 are detachably attached to a power supply plug 13 provided in a main body 12 of the apparatus to be held horizontally. ing.

As shown in FIGS. 1 and 2, the cover 2 has a cylindrical shape made of glass, synthetic resin or the like, and is transparent with high light transmittance. On the outer peripheral surface of the cover 2, a patterned opaque surface 221 is formed along the axis. The opaque surface 221 is formed by sandblasting, chemical etching, a coating film, or the like. Then, this opaque surface 22
The area where 1 is formed serves as a light blocking portion 2a which blocks the transmission of light, and the area where the opaque surface 221 is not formed serves as a light transmitting portion 2b which allows the transmission of light A. The opaque surface 221 is
The cover 2 can be formed in a striped shape over the entire length thereof, a polka dot shape scattered over the entire area of the cover 2, and other various patterns, and if the disposition density is different in the circumferential direction. I have it. The cover 2 has both ends opened and is set to be shorter than the entire length of the fluorescent lamp 1. The opaque surface 221 is formed over the entire length of the cover 2.

The cover holding means 3 is, for example, a pair of holding members 31 made of leaf springs for rotatably enclosing the portions near both ends of the cover 2. As shown in FIGS. 2 and 3, each holder 31 has a base portion 31a fixed to the lower surface of the apparatus main body 12 by screws (not shown) and the base portion 3a.
A pair of curved arms 31b extending integrally from both ends of 1a
And the outer circumference of the cover 2 is slidably held by the curved arms 31b. Then, the cover 2 can be attached to and detached from the holder 31 by temporarily elastically deforming the curved arms 31b outward. In addition, a locking tongue piece 31c that abuts or approaches the end surface of the cover 2 is integrally projectingly provided on the base portion 31a of the holder 31, and this locking tongue piece 31c moves in the axial direction of the cover 2. We are trying to prevent misalignment.

With such a configuration, the light A emitted from the fluorescent lamp 1 is transmitted through the opaque surfaces 221 with a gap between the light-transmitting portions 2.
It passes through b and is irradiated to the outside. At this time, the opaque surface 2
21 is a light-transmitting portion because the arrangement density is varied in the circumferential direction.
The amount of the light A projected from 2b shows various values at each position in the circumferential direction. Therefore, by rotating the cover 2, it is possible to adjust the light projection amount to a specific position and set the brightness at hand to a desired value. Further, in such a case, the light A leaks from between the opaque surfaces 221 in a form corresponding to the pattern, and since the form changes by rotating the cover 2, the pattern is appropriately selected. By doing so, it is possible to produce a lighting design that matches the atmosphere of the space in which it is used.

Embodiment 2 (Fig. 4) The illumination device of this embodiment is such that a mirror film 421 is formed in an arbitrary pattern on the outer peripheral surface of a transparent cover 2 arranged in the outer peripheral area of a fluorescent lamp 1. The cover 2 is rotatably held by the cover holding means 3 similar to the first embodiment. The mirror film 421 is provided, for example, on the outer peripheral surface of the cover 2, and the reflecting surface 422 is formed on the inner surface side of the mirror film 421. Then, the region where the mirror film 421 is provided becomes the light shielding portion 2a which blocks the transmission of light, and the mirror film
A region where 421 is not formed is a light transmitting portion 2b that allows the light A to pass therethrough.

With such a structure, not only the direct light A from the fluorescent lamp 1 but also the light B reflected by the reflecting surface 422 is added to the light projected to the outside through the light transmitting portion 2b, so that the pattern Bright lights A and B that are rich in variations are spilled out from the translucent part 2b formed between the mirror films 421 in a shape, so that a lighting design with rich decorativeness can be produced. Moreover, since the light-shielding portions 2a formed by the patterned mirror film 421 have different arrangement densities in the circumferential direction, it is possible to appropriately adjust the brightness for a specific position by rotating the cover 2. It is possible.

A half mirror film may be used instead of the mirror film 421. In that case, as shown by the phantom line in FIG.
Of the light A reaching the reflecting surface 422, a part of the light C is not reflected as it is and leaks to the outside, so that a constant brightness is obtained from the area other than the light transmitting portion 2b (semi-light transmitting portion). Will be provided to the outside, creating a more profound atmosphere. Therefore, this embodiment can be suitably used for a desk lamp or the like.

Embodiment 3 (FIGS. 5 and 6) The illumination device of this embodiment includes a fluorescent lamp 1, a transparent cylindrical inner cover 4 arranged in the outer peripheral area of the fluorescent lamp 1, and the inner cover 4. It is provided with a transparent outer cover 5 which is fitted on the outer periphery of the outer cover so as to be relatively rotatable, and a cover holding means 3 which holds the inner cover 4 at a predetermined position.

The inner cover 4 has a length similar to that of the cover 2 of the first embodiment. For example, both ends thereof are rotatably supported by the cover holding means 3 similar to those shown in FIGS. 2 and 3. Has been done.

The outer cover 5 is set to be slightly shorter than the inner cover 4 so as not to interfere with the cover holding means 3 that holds both ends of the inner cover 4, and is rotatable around the outer circumference of the inner cover 4. Is fitted to.

Then, polarization filters 841 and 851 having a constant width along the axis are provided on the outer peripheral surface of the inner cover 4 and the outer peripheral surface of the outer cover 5, and the polarization directions of the both polarization filters 841 and 851 are different from each other by 90 °. ing.

With such a configuration, when the both polarization filters 841 and 851 are completely overlapped as shown in FIG. 5, the overlapped portion becomes a light shielding portion a that blocks passage of light, The other part becomes a light transmitting part b which allows the passage of light. When the outer cover 5 and the inner cover 4 are rotated relative to each other in this state and the deflection filters 841 and 851 are set to partially overlap with each other as shown in FIG. Between the part b and the light reducing part d, the light A passes through only one deflection filter 841 or 951. The area ratios of the light-shielding portion a, the light-reducing portion d, and the light-transmitting portion b can be variously changed by relatively rotating the both covers 4 and 5.
By rotating 5 at the same time, the direction can be freely adjusted. Therefore, an extremely wide variety of illumination modes can be appropriately selected and used.

Embodiment 4 (FIG. 7) In the illumination device of this embodiment, a plurality of opaque surfaces 1041 orthogonal to the axis are formed on the inner cover 4 in a horizontal stripe pattern at a predetermined pitch. Each opaque surface 1041 is shaped so that its width dimension gradually changes in the circumferential direction. Also, the outer cover 5
, A plurality of opaque surfaces 1051 having a constant width orthogonal to the axis
Are formed in horizontal stripes at the same pitch as the inner cover 4. The outer cover 5 is made shorter than that of the third embodiment so that the outer cover 5 can be slid back and forth with respect to the inner cover 4 in the axial direction. Inner cover 4
Is rotatably held on the apparatus main body 2 by the above-mentioned cover holding means 3, for example.

With such a structure, by sliding the outer cover 5 relative to the inner cover 4 in the axial direction, the overlapping regions of the opaque surfaces 1041 and 1051 are changed, and the light-shielding portion a and the light-transmitting portion a are transmitted. The area ratio of the portion b changes steplessly. Further, in such a case, the width of the light transmitting portion b is gradually changed in the circumferential direction, so that the inner cover 4 and the outer cover 5 are formed.
The brightness for a specific position can also be adjusted by rotating both and.

In addition, in the above-described first to fourth embodiments, the case where the cover is transparent has been described, but these covers may be made of a semitransparent material having a light scattering effect or the like. Further, the cover is not limited to being uncolored and may be colored transparent or colored translucent.

The cover holding means is not limited to the one described above, and may be, for example, the one shown in FIG. In this cover holding means 6, a U-shaped bracket 61 having both ends 61a bent inward is attached to the outer surface of the socket 13 of the apparatus body 12. The bracket 61 is covered with a lid 62 having a cylindrical shape with a bottom and a notch 62b for avoiding interference with the socket 13 on the circumferential wall 62a, and the circumferential wall 62a of the lid 62 is covered with a screw (not shown). The bracket 61 is fixed to both ends 61a. And
The end portion of the cover 2 is rotatably inserted and held in the inner periphery of the lid body 62.

Further, the light source is not limited to a straight tube type having plugs at both ends, and may be, for example, one as shown in FIG. That is, this is a light source with a plug 11 at one end.
A cantilever type fluorescent lamp 101 having 1 is used. Cover 10
Reference numeral 2 denotes a bottomed cylindrical shape, the open end of which is rotatably supported by the apparatus main body 112. In this case, the cover holding means 103 attaches to the apparatus main body 112 a ring member 132 that has a holding groove 131 on the inner circumference and is attached to the apparatus main body 112.
A collar portion 102a provided at the opening end of the cover 102 is slidably engaged with the second holding groove 131. On the outer periphery of the bottomed cylindrical cover 102, an opaque surface, a mirror film, a half mirror film, or the like similar to that of the first or second embodiment is formed.

Various accessories can be attached to the cover. For example, in the lighting device shown in FIG. 10, a wiper 7 made of an elastic material is attached to the device body 12, and the wiper 7 is slidably contacted with the outer periphery of the cover 2 (or 5) over the entire length. With such a configuration, every time the cover 2 (or 5) is rotated, dust attached to the outer periphery of the cover 2 (or 5) can be automatically wiped off by the wiper 7. Therefore, if the end portion of the cover 2 (or 5) is closed by the lid body so that dust does not easily adhere to the inner circumference of the cover 2 (or 5), no initial cleaning operation is required for a long period of time without any special cleaning work. It is possible to maintain the brightness. On the other hand, the
In the illuminating device shown in FIG. 11, the cord 8 is wound around the end of the cover 2 a plurality of times, and both ends of the cord 8 are hung downward. The center of the cord 8 is fixed to the cover 2 by using appropriate fasteners, and knobs 81 and 82 are provided at both ends.
Is provided. According to this structure, if the right knob 81 is pulled downward, the cover 2 is rotated clockwise, and if the left knob 82 is pulled downward, the cover 2 is counterclockwise. Rotate in the rotating direction. Therefore, even when the cover 2 is installed at a high position such as the ceiling, the turning position of the cover 2 can be appropriately adjusted from below without using a step or the like.

In addition, various modifications can be made without departing from the spirit of the present invention.

EFFECTS OF THE INVENTION Since the present invention is configured as described above, it is possible to change the amount of light radiated to a specific area such as the top of a desk in a stepless manner, and to illuminate a specific position. The state can be adjusted as needed. Therefore, it is possible to easily deal with the individual correspondence of the lighting, which is deeply involved in the intellectual production activity, without causing the complexity of the device or the system. Further, since the amount of light projected and the direction of light projected can be adjusted relatively freely, it is possible to effectively prevent or suppress the reflection of illumination light on the display device, and it is suitable for lighting in various spaces such as offices and homes. It can be used preferably.

In particular, the array density of opaque patterns formed on the cover,
When the arrangement density of the mirror film or the half mirror film is varied in the circumferential direction, the amount of light projected onto a specific area can be adjusted steplessly and delicately by simply rotating the cover. Therefore, the illumination degree of the desired area can be appropriately adjusted and used without using a complicated light emission amount control means or the like.

Further, in the case where the inner cover and the outer cover which are rotatable relative to each other are provided with polarization filters having substantially constant widths in which the polarization directions are different from each other, a region without a polarization filter, a region with one polarization filter, It is possible to freely polarize the ratio of the region where the two polarizing filters are superposed to perform the light blocking function by relatively rotating the inner and outer covers. Therefore, the amount of light projected onto the specific area can be changed steplessly.
Moreover, since the width and direction of the region where the two polarizing filters are polymerized to perform the light shielding function can be freely changed, it is possible to effectively prevent the illumination light from being reflected on the display device. .

Further, in the case where the opaque surface is formed in a horizontal stripe shape on the inner and outer covers, and the width dimension of the opaque surface is gradually changed in the circumferential direction, the horizontal stripe is formed by relatively moving the inner cover and the outer cover in the axial direction. It is possible to adjust the degree of polymerization of the opaque surfaces of each other and to adjust the width dimension of the through hole. Further, since the lateral widths of the lateral striped opaque surfaces are made different in the circumferential direction, the width dimension of the translucent portion formed between the opaque surfaces also varies in the circumferential direction. Therefore, by relatively moving or rotating the inner and outer covers in the axial direction, it is possible to finely adjust the light projection amount to the specific area. Therefore, there is a special effect that the illumination state for the specific region can be precisely adjusted over a wide range.

[Brief description of drawings]

FIG. 1 is a transverse sectional view of a light source and a cover showing a first embodiment of the present invention, FIG. 2 is a partially cutaway front view of the same embodiment, and FIG. 3 shows a cover holding means in the same embodiment. FIG. 4 is a cross-sectional view corresponding to FIG. 1 showing the second embodiment, FIG. 5 is a cross-sectional view corresponding to FIG. 1 showing the third embodiment, and FIG. FIG. 7 is a partially cutaway front view showing the fourth embodiment, FIG. 8 is an exploded perspective view showing another embodiment, and FIG. 9 is a longitudinal sectional view showing yet another embodiment. FIG. 10 is a partial cross sectional view showing still another embodiment, and FIG. 11 is a partial cross sectional view showing still another embodiment. 1 ... Light source (fluorescent lamp), 2 ... Cover 2a ... Translucent part, 2b ... Shading part 3 ... Cover holding means, 4 ... Inner cover 5 ... Outer cover, 6 ... Cover holding means 7 ...... Wiper, 8 ...... String 11 ...... Plug, 12 ...... Device body 13 ...... Socket 221 ...... Opaque surface 421 ...... Mirror film 422 ...... Reflection surface 841, 851 ...... Polarization filter 1041, 1051 ...... Opaque surface A, B, C ... light a ... light-shielding part, b ... translucent part

Continued Front Page (56) References Open 63-111708 (JP, U) Open 55-36578 (JP, U) Open 51-137992 (JP, U)

Claims (6)

[Claims] 1. A light source, a transparent or semi-transparent cover arranged in the outer peripheral region of the light source, and a cover holding means for holding the cover rotatably in the circumferential direction. An illuminating device, characterized in that pattern-shaped opaque surfaces are formed with different arrangement densities in the circumferential direction. 2. A light source, a transparent or semi-transparent cover arranged in the outer peripheral area of the light source, and a cover holding means for holding the cover rotatably in the circumferential direction. An illuminating device characterized in that pattern-shaped mirror films or half-mirror films whose inner surface side is a reflecting surface are formed with different arrangement densities in the circumferential direction. 3. A light source, a transparent or semi-transparent inner cover arranged in the outer peripheral area of the light source, and a transparent or semi-transparent outer cover fitted to the outer periphery of the inner cover so as to be relatively rotatable. A cover holding means for holding one of the covers at a predetermined position, each cover being provided with a polarization filter having a substantially constant width along the axis, and the polarization directions of these polarization filters are mutually different. Lighting device. 4. A light source, a transparent or semi-transparent inner cover arranged in the outer peripheral region of the light source, and a transparent or semi-transparent outer cover fitted to the outer periphery of the inner cover so as to be relatively movable in the axial direction. And a cover holding means for holding at least one cover at a predetermined position, each cover having an opaque surface substantially orthogonal to the axial center formed in a horizontal stripe shape, and formed on at least one cover. An illuminating device characterized in that the lateral dimension of the opaque surface is gradually changed in the circumferential direction. 5. The light source is a straight tube type having plugs at both ends, and the cover has a cylindrical shape with both ends open. Lighting equipment. 6. The lighting device according to claim 1, wherein the light source is a cantilever type having a plug at one end, and the cover has a bottomed cylindrical shape. .