JP2012094306A - Lighting fixture - Google Patents

Abstract

An object of the present invention is to provide a lighting fixture capable of realizing a plurality of light distribution patterns without increasing the size of the fixture body.
The luminaire includes a light source, a plate-shaped light distribution member that transmits light from the light source, and a drive unit that changes a mutual relationship between the light source and the light distribution member. The light distribution member 2 includes a plurality of prisms 4 having different refraction directions, and the driving unit 3 drives to change the light irradiation direction by changing the prism 4 through which the light from the light source 1 passes through the light distribution member 2. It is a thing to let it be. Since there is no need to provide a plurality of light distribution members and drive units, there is an effect that the structure is simplified. Thereby, a some light distribution pattern is realizable, without enlarging the size of an instrument main body.
[Selection] Figure 1

Description

  The present invention relates to a lighting fixture.

  As a means for changing the light distribution of the luminaire, a method of moving and rotating a light distribution member such as a lens by a drive system such as a motor can be considered. For example, it is Unexamined-Japanese-Patent No. 5-144310 (patent document 1).

  This conventional example includes a light source, a prism, and a motor. The direction of change in the direction of light irradiation from the light source can be moved in one direction simply by rotating the prism with a motor.

  In addition, as disclosed in Japanese Patent Application Laid-Open No. 2009-54322 (Patent Document 2), a lighting fixture that can easily change the light distribution in a free direction has been proposed. This conventional example includes a planar light source, a plurality of light distribution members, an instrument body, and the like. Each light distribution member is rotatable independently of each other along a plane parallel to the light emitting surface, and its thickness direction is arranged along the optical axis. The light exit surface of the light distribution member is provided with a plurality of prisms with an isosceles triangle shape or a sawtooth shape in cross section, and the direction of light irradiation from the planar light source can be easily changed by simply rotating the light distribution member. To do.

JP-A-5-144310 JP 2009-54322 A

  However, the lighting apparatus disclosed in Patent Document 1 cannot move the direction of change in the light irradiation direction in the other direction. Moreover, although the conventional lighting fixture shown by the said patent document 2 can implement | achieve a several light distribution pattern, since it has mounted several light distribution members, it becomes a complicated structure. Furthermore, when a motor or the like is used for rotation, a plurality of drive systems are required, and the size of the instrument body may be increased.

  This invention is invented in view of the said background art, and it aims at providing the lighting fixture which can implement | achieve a several light distribution pattern, without enlarging the size of a fixture main body.

  The lighting apparatus of the present invention includes a light source, a plate-shaped light distribution member that transmits light from the light source, and a drive unit that changes a mutual arrangement relationship between the light source and the light distribution member, and the light distribution. The member includes a plurality of prisms having different refraction directions, and the driving unit is driven to change a light irradiation direction by changing a prism through which light from the light source passes through the light distribution member. And

  In this lighting fixture, the light distribution member has a plurality of lens portions having different arrangement patterns of the prisms, and the light distribution member is switched by driving the light distribution member by the driving unit and switching the lens unit. It is preferable.

  In this luminaire, the light distribution member is formed into a substantially cylindrical shape, the plurality of lens portions are arranged in the circumferential direction of the cylinder, and are rotatable around a central axis thereof. The light source is disposed inside the light distribution member. Preferably, the lens unit is switched by rotating the light distribution member.

  In this lighting fixture, the light distribution member is formed into a substantially disk shape, the plurality of lens portions are disposed in the circumferential direction of the disk, and the light distribution member is rotatable around a central axis thereof, and the light distribution member is rotated. It is preferable that the lens unit is switched.

  In this lighting fixture, it is preferable that the light source is driven by the driving unit to change a prism through which light from the light source passes through the light distribution member.

  In this lighting apparatus, it is preferable that the drive unit is a motor, and the light source is turned off when the motor is driven and the light source is turned on when the motor is stopped.

  The lighting fixture of the present invention has an effect that the structure is simplified because it is not necessary to provide a plurality of light distribution members and driving units. Thereby, a some light distribution pattern is realizable, without enlarging the size of an instrument main body.

The perspective view (a) and front view (b) which show the whole lighting fixture which is Embodiment 1 of this invention. The schematic diagram at the time of extending the light distribution member 2 used for Embodiment 1 in flat form. Sectional drawing of the said light distribution member 2 in a1, a2, b, c1, c2 of FIG. The schematic diagram showing the mode of the movement of the light on the floor surface 9 at the time of operation | movement of the lighting fixture which is Embodiment 1. FIG. The perspective view (a) and front view (b) which show the whole lighting fixture which is Embodiment 2 of this invention. FIG. 5 is a schematic diagram of a light distribution member 2 used in Embodiment 2. Sectional drawing of the said light distribution member 2 in a1, a2, b, c1, c2 of FIG. The schematic diagram showing the mode of the movement of the light on the floor surface 9 at the time of operation | movement of the lighting fixture which is Embodiment 2. FIG. The perspective view (a) which shows the whole lighting fixture which is Embodiment 3 of this invention, and the enlarged view (b) of the light source 1. FIG. The schematic diagram of the light distribution member 2 used for Embodiment 3. FIG. Sectional drawing of the said light distribution member 2 in a of FIG. The schematic diagram showing the mode of the movement of the light on the floor surface 9 at the time of operation | movement of the lighting fixture which is Embodiment 3. FIG. The perspective view (a) and front view (b) which show the whole lighting fixture which is Embodiment 4 of this invention. The schematic diagram at the time of extending the light distribution member 2 used for Embodiment 4 in flat form. Sectional drawing of the said light distribution member 2 in a1, a2, b, c1, c2 of FIG. The schematic diagram showing the mode of the movement of the light on the floor surface 9 at the time of operation | movement of the lighting fixture which is Embodiment 4. FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
1-4 has shown the lighting fixture concerning Embodiment 1. FIG.

  This luminaire includes a light source 1, a plate-like light distribution member 2 that transmits light from the light source 1, and a drive unit 3 that changes the mutual arrangement relationship between the light source 1 and the light distribution member 2. The member 2 includes a plurality of prisms 4 having different refraction directions, and the driving unit 3 drives the light to change the light irradiation direction by changing the prism 4 through which the light from the light source 1 passes through the light distribution member 2. It is characterized by that.

  Further, the light distribution member 2 of this lighting fixture has a plurality of lens portions 5 having different arrangement patterns of the prisms 4, and the light distribution member 2 is displaced by the drive unit 3 to switch the lens unit 5 to change the light irradiation direction. It is characterized by being changed.

  Further, in this lighting fixture, the light distribution member 2 is formed into a substantially cylindrical shape, a plurality of lens portions 5 are arranged in the circumferential direction of the cylinder, and the light distribution member 2 is rotatable around its central axis. The lens portion 5 is switched by rotating the light distribution member 2.

  Further, the driving unit 3 of the lighting fixture includes a motor 6, and the light source 1 is turned off when the motor 6 is driven, and the light source 1 is turned on when the motor 6 is stopped.

  Hereinafter, a more specific description of the first embodiment will be given.

  The light source 1 includes, for example, one or a plurality of fluorescent lamps, HID, LED, and the like. A lens for concentrating light on the front surface of the light source 1 may be installed.

  The light distribution member 2 has one or more lens portions 5. The lens unit 5 includes a plurality of prisms 4 having different refraction directions. Various light distribution patterns can be realized by one lens unit 5 according to the arrangement pattern of the prisms 4.

  Various arrangements of the prisms 4 are conceivable depending on the arrangement of the prisms 4 and the selection of the angle.

  For example, each prism 4 having a linear ridgeline as shown in FIG. 2B is arranged so as to be parallel to the central axis of the cylinder. At that time, a light distribution pattern as shown in FIG. 4B is realized by selecting an arrangement pattern of the prisms 4 so that the inclination angle of the inclined surface gradually increases or gradually decreases when viewed from the center of the lens portion 5B. Can do.

  Further, for example, as in 5A and 5C in FIG. 2, the ridgelines of the prisms 4 are arranged in an elliptical arc shape having the same center. At that time, the arrangement pattern of the prisms 4 is selected so that the inclination angle of the slope of each prism 4 gradually increases or decreases from the center to the end of the lens portions 5A and C according to the orientation from the center of the elliptical arc. , C can be realized. Since a circle is a subordinate concept of an ellipse, it is natural that an elliptical arc arrangement includes an arcuate arrangement. Further, as a matter of course, since the arrangement of the ridgeline of the portion through which light is transmitted only needs to be an elliptical arc shape, the above effect can be produced even if the ridgeline draws an ellipse itself as a whole.

  When the driving unit 3 is driven, the light distribution member 2 is rotated, the mutual arrangement relationship between the light source 1 and the light distribution member 2 is changed, and the lens unit 5 through which light from the light source 1 is transmitted is displaced. The irradiation direction is changed. In the present embodiment, the light distribution member 2 has the three lens portions 5, but the present invention is not limited to this. If one or two or more lens portions 5 are provided, this effect can be produced.

  Here, when the light distribution member 2 is provided with the plurality of lens portions 5 in the cylindrical circumferential direction as in this embodiment, the lens portion 5 is switched by rotating the light distribution member 2 with the motor 6. It can be done easily. Furthermore, since it is not necessary to mount a plurality of light distribution members 2, the structure is simple and the number of parts can be reduced. In addition, the overall lighting fixture can be reduced in size.

  In the present embodiment, the plate-like light distribution member 2 is bent and connected to the end portion to form a substantially cylindrical shape, but this is rotated, but the present invention is not limited to this. is there. For example, the object of the present invention can be achieved by simply rotating a U-shaped plate-shaped light distribution member 2 that is curved without being connected to the end, or the light distribution member 2 that is extended in a flat plate shape can be obtained. The object of the present invention can also be achieved by parallel translation.

  The drive unit 3 includes a motor 6, and turns off the light source 1 when the motor 6 is driven and turns on the light source 1 when the motor 6 is stopped. When it is not necessary to visually recognize the change in the light irradiation direction, it is possible to irradiate light only in a desired direction. A detector that detects the driving of the motor 6 may be provided. In the present embodiment, the drive unit 3 is composed of the motor 6. However, the present invention is not limited to this. For example, the object of the present invention can be achieved even with the driving unit 3 made of human power.

According to this embodiment, the light irradiation direction can be changed by one drive unit 3 and one light distribution member 2, and the number of parts can be reduced. Further, by arranging a plurality of lens portions 5 on one light distribution member 2, the number of parts can be reduced. Further, the lens portion 5 can be easily switched by rotating the light distribution member 2 in the cylindrical circumferential direction. Moreover, the drive part 3 can be made into the motor 6, and the movement of the irradiation part of light can be made invisible by turning off and turning on the light source 1 with the drive and stop of the motor 6.
(Embodiment 2)
5-8 has shown the lighting fixture concerning Embodiment 2. FIG.

  In this luminaire, the light distribution member 2 is formed into a substantially disk shape, a plurality of lens portions 5 are arranged in the circumferential direction of the disk, and the light distribution member 2 is rotated around its central axis to rotate the lens. Although it is different from the luminaire described in Embodiment 1 in that the unit 5 is switched, other configurations are the same.

  Hereinafter, the second embodiment will be described more specifically.

  Similar to the luminaire described in the first embodiment, the light distribution member 2 has one or more lens portions 5. The lens unit 5 includes a plurality of prisms 4 having different refraction directions. Various light distribution patterns can be realized by one lens unit 5 according to the arrangement pattern of the prisms 4.

  Various arrangements of the prisms 4 are conceivable depending on the arrangement of the prisms 4 and the selection of the angle.

  For example, each prism 4 having a linear ridge line is arranged radially as shown in 5B of FIG. At that time, as shown in FIG. 8B, by selecting an arrangement pattern of the prisms 4 such that the inclination angle of the inclined surface gradually increases or decreases when viewed from the center of the lens portion 5B as shown in FIG. A light distribution pattern can be realized.

  Further, for example, the prisms 4 each having a linear ridge line are arranged in parallel as in the parts 5A and 5C of FIG. At this time, an arrangement pattern of the prisms 4 is selected so that the inclination angle of the inclined surface of each prism 4 gradually increases or decreases from the center to the end of each lens portion 5A, C according to the orientation from the center of the light distribution member 2. Thus, a light distribution pattern as shown in FIGS. 8a and 8c can be realized.

According to the present embodiment, the lens unit 5 can be easily switched by rotating the light distribution member 2 in the circumferential direction of the disk. Moreover, since it is not necessary to bend the light distribution member 2, manufacture becomes easy.
(Embodiment 3)
9-12 has shown the lighting fixture concerning Embodiment 3. FIG.

  This luminaire is characterized by changing the prism 4 through which the light from the light source 1 is transmitted through the light distribution member 2 by displacing the light source 1 by the drive unit 3.

  The lighting fixture includes a light source 1, a plate-like light distribution member 2 that transmits light from the light source 1, and a drive unit 3 that changes a mutual arrangement relationship between the light source 1 and the light distribution member 2. The light distribution member 2 includes a plurality of prisms 4 having different refraction directions, and changes the light irradiation direction by changing the prism 4 through which the light from the light source 1 is transmitted when the drive unit 3 is driven. In addition, the drive unit 3 includes a motor 6, and the light source 1 is turned off when the motor 6 is driven and the light source 1 is turned on when the motor 6 is stopped. It is the same as that of the lighting fixture of the said Embodiment 1 and 2.

  Hereinafter, the third embodiment will be described more specifically.

  The light source 1 is connected to the drive unit 3 and moves along a spiral rail 7. The drive unit 3 includes a gear 8 and a power feeding unit 9 for the light source 1 to travel along the rail 7. The light source 1 is displaced along the rail 7 by the drive unit 3, and the prism 4 through which the light from the light source 1 is transmitted through the light distribution member 2 is changed by changing the mutual arrangement relationship between the light source 1 and the light distribution member 2. The light irradiation direction is changed. Although the light source 1 is displaced along the spiral rail 7 as in this embodiment, the present invention is not limited to this. For example, the object of the present invention can also be achieved by displacing along the zigzag rail 7.

  Similar to the luminaire described in the first embodiment, the light distribution member 2 has a lens portion 5. The lens unit 5 includes a plurality of prisms 4 having different refraction directions. Various light distribution patterns can be realized by one lens unit 5 according to the arrangement pattern of the prisms 4.

  Various arrangements of the prisms 4 are conceivable depending on the arrangement of the prisms 4 and the selection of the angle.

  For example, as shown in FIG. 10, the prisms 4 having substantially circular ridge lines are arranged concentrically. At this time, as shown in FIG. 11, an arrangement pattern of the prisms 4 is selected so that the inclination angle of the inclined surface gradually increases or decreases from the center to the end of the lens unit 5 as in the present embodiment. In addition, when the light source 1 is displaced along the spiral rail 7, a light distribution pattern as shown in FIG. 12 can be realized.

According to the present embodiment, various light distribution patterns can be realized without providing the plurality of lens portions 5 on the light distribution member 2, which facilitates manufacture.
(Embodiment 4)
13-16 has shown the lighting fixture concerning Embodiment 4. FIG.

  This luminaire includes light sources 1a, b, and c provided in a straight line, and the light distribution member 2 is bent around an axis parallel to the direction of the light source 1, and the plurality of lenses are arranged in the direction of the light source 1. Although it differs from the lighting fixture described in the said Embodiment 1 by the point which arrange | positions the part 5 and can be rotated to the surroundings of the direction of the light source 1, other structures are the same.

  More specific description of the fourth embodiment will be given below.

  The light distribution member 2 has the same number of lens portions 5 as the light source 1. The lens unit 5 includes a plurality of prisms 4 having different refraction directions. Various light distribution patterns can be realized by one lens unit 5 according to the arrangement pattern of the prisms 4.

  Various arrangements of the prisms 4 are conceivable depending on the arrangement of the prisms 4 and the selection of the angle.

  For example, each prism 4 having a linear ridge line as shown in FIG. At this time, a light distribution pattern as shown in FIG. 16B is realized by selecting an arrangement pattern of the prisms 4 such that the inclination angle of the inclined surface gradually increases or decreases between the adjacent prisms 4 when viewed from the center of the lens portion 5B. Can do.

  Further, for example, as shown in 5A and 5C in FIG. 14, the ridgelines of the prisms 4 are arranged in an elliptical arc shape having the same center. At this time, the arrangement pattern of the prisms 4 is selected so that the inclination angle of the inclined surface of each prism 4 gradually increases or decreases from the center to the end of the lens portions 5A and C according to the orientation from the center of the elliptical arc. , C can be realized. As described above, as a matter of course, the elliptical arc-shaped arrangement includes an arc-shaped arrangement, and the above-described effect can be produced even if the ridge line describes the ellipse itself.

  Since the present invention is configured as described above, a complicated light distribution pattern can be realized by one light distribution member 2 and one drive unit 3. Thereby, the number of parts can be reduced, and downsizing of the instrument can be realized.

DESCRIPTION OF SYMBOLS 1 Light source 2 Light distribution member 3 Drive part 4 Prism 5 Lens part 6 Motor 7 Rail 8 Gear 9 Power feeding part 10 Floor surface

Claims (6)

A light source;
A plate-like light distribution member that transmits light from the light source;
A drive unit that changes a mutual arrangement relationship between the light source and the light distribution member;
The light distribution member includes a plurality of prisms having different refraction directions,
A lighting apparatus, wherein the light irradiation direction is changed by changing a prism through which light from the light source is transmitted through the light distribution member when the driving unit is driven. The light distribution member has a plurality of lens portions with different arrangement patterns of the prisms,
The lighting apparatus according to claim 1, wherein the illumination direction is changed by displacing the light distribution member by the driving unit and switching the lens unit. While making the light distribution member substantially cylindrical and disposing the plurality of lens portions in the circumferential direction of the cylinder,
It can be rotated around its central axis,
The light source is provided inside the light distribution member,
The lighting apparatus according to claim 2, wherein the lens unit is switched by rotating the light distribution member. While making the light distribution member into a substantially disk shape and disposing the plurality of lens portions in the circumferential direction of the disk,
It can be rotated around its central axis,
The lighting apparatus according to claim 2, wherein the lens unit is switched by rotating the light distribution member.   The lighting apparatus according to claim 1, wherein the light source is displaced by the driving unit to change a prism through which light from the light source is transmitted through the light distribution member. The drive unit comprises a motor,
The lighting apparatus according to any one of claims 1 to 5, wherein the light source is turned off when the motor is driven, and the light source is turned on when the motor is stopped.

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