JP6048798B2 - Condensing device and lighting apparatus using the same - Google Patents

Description

  The present invention relates to a light collecting device attached to an irradiation opening of a lighting fixture having an LED light emitting unit and a lighting fixture using the same.

2. Description of the Related Art Conventionally, there is known an apparatus that controls illumination by being attached in the irradiation direction of a lighting fixture (see, for example, Patent Document 1).
As shown in FIG. 9, a hood 101 is attached as a device for controlling illumination in front of the condensing spotlight (lighting fixture) 100 using the LED 104 (left side in FIG. 9).

The hood 101 is formed of a light-transmitting soft elastic material in a hollow shape, and includes an insertion-side hood end portion 102.
The insertion side hood end 102 has a hollow shape with a predetermined length L, and the outer shape matches the inner shape of the irradiation port 103 of the spotlight 100.
Therefore, the insertion side hood end 102 of the hood 101 is attached by being inserted inside the hollow irradiation port 103.
In addition, the thickness of the insertion side hood end portion 102 is formed so as to increase in the insertion direction X.

JP2012-64325A (FIG. 3)

In the hood (light collecting device) 101 described in Patent Document 1 as described above, the illumination range in a room or the like is controlled by irradiating light from the LED 104 through the long hood 101.
However, it is desired to provide a highly condensing device that can irradiate light in a state where the irradiation range is narrowed down efficiently in order to illuminate a narrower range, and a lighting fixture using the same. .

  The present invention has been made in order to solve the conventional problems, and can collect the light emitted from a plurality of LED light-emitting sections efficiently in a predetermined shape while reducing light loss. An object of the present invention is to provide an optical device and a lighting fixture using the same.

The light collecting device of the present invention is a light collecting device attached to an irradiation opening of a lighting fixture having a plurality of LED light emitting units, and is a cylindrical housing attached so as to protrude toward the irradiation direction of the LED light emitting unit. A body part and an end cap that covers an end portion on the irradiation direction side of the housing part, and the housing part corresponds to each of the outer peripheral wall including the plurality of LED light emitting parts and the LED light emitting part. And an end wall that divides the inside of the outer peripheral wall, and the end cap has an opening that emits light emitted from each of the LED light emitting portions for each of the partition portions partitioned by the inner wall, It arrange | positions in contact with the said inner wall .

  Furthermore, in the condensing device of the present invention, it is preferable that the center in the radial direction of the opening is disposed on the optical axis of the LED light emitting unit.

  Moreover, as for the condensing device of this invention, it is preferable that the cross-sectional shape which the housing | casing part cut | disconnected in parallel with respect to the installation surface of a LED light emission part is substantially equivalent to the irradiation opening of a lighting fixture.

  In addition, the light-collecting device of the present invention includes a first LED light-emitting unit located at the center in the radial direction of the lighting fixture, and a plurality of LED light-emitting units arranged so as to surround the first LED light-emitting unit. When the second LED light emitting unit is provided, the shape of the partitioning portion of the first LED light emitting unit is preferably a regular polygon.

  Moreover, the lighting fixture of this invention is provided with the condensing apparatus as described in any one of the said at least, and several LED light emission part.

  According to the present invention, it is possible to obtain a light collecting device having an effect that light emitted from a plurality of LED light emitting units can be efficiently condensed into a predetermined shape while reducing light loss. In addition, by combining this light collecting device and a plurality of LED light emitting units, it is possible to provide a lighting device with high light collecting properties.

BRIEF DESCRIPTION OF THE DRAWINGS (A) is the condensing device of 1st Embodiment which concerns on this invention, and a lighting fixture side view using the same, and sectional drawing, (B) is the bottom view seen from B direction in (A) Exploded perspective view of a lighting fixture and a light collecting device mounted on the lighting fixture Cross section of LED light emitting part Sectional view of the mounting part attached to the housing Explanatory drawing of irradiation light that passes through the inside of the compartment (A) is a bottom view of the end cap, and (B) is a plan view showing an irradiation shape corresponding to the opening shown in (A). (A) is a disassembled perspective view of the front-end | tip part of the condensing apparatus of 2nd Embodiment which concerns on this invention, (B) is a perspective view which shows irradiation shape (A) is a bottom view and an irradiation shape plan view of another example end cap, (B) is a bottom view and an irradiation shape plan view of yet another example end cap, and (C) is a further illustration. Bottom view of another example end cap and plan view of irradiation shape Cross-sectional view of a conventional lighting fixture

(First embodiment)
Hereinafter, the condensing device of 1st Embodiment which concerns on this invention, and a lighting fixture using the same are demonstrated using drawing.
As shown in FIG. 1A, the light condensing device 20 </ b> A according to the first embodiment of the present invention is attached to the irradiation opening 12 in the fixture body 11 of the lighting fixture 10.
In the following description, the irradiation direction of the luminaire 10 is referred to as the lower side (lower side), and the direction opposite to the irradiation direction is referred to as the upper side (upper side).

The fixture body 11 is a part of a member constituting the lighting fixture 10 and includes a light source. In 1st Embodiment, the instrument main body 11 is exhibiting the cylindrical shape, and has the irradiation opening 12 in the irradiation direction side edge part. However, in the present invention, the shape of the instrument body 11 is not particularly limited.
Moreover, the bracket 13 is provided in the instrument main body 11 toward the outer side. An attachment plate 14 is provided at the tip of the bracket 13, and the luminaire 10 is attached to the wall surface W by attaching the attachment plate 14 to the wall surface W that is an attachment portion.

The condensing device 20 </ b> A includes a cylindrical housing portion 21 </ b> A attached so as to protrude toward the irradiation direction (downward) of the LED light emitting unit 30.
An end (lower end) in the irradiation direction side of the casing 21A is covered with an end cap 22A. In addition, the upper end portion of the housing portion 21 </ b> A has an attachment portion 23 for attaching the housing portion 21 </ b> A to the instrument body 11.

The casing portion 21 </ b> A has a cylindrical outer peripheral wall 24 formed so as to enclose all of the plurality of LED light emitting portions 30. Further, the inside of the outer peripheral wall 24 is partitioned by an inner wall 25A to form a partition portion 26A.
The outer peripheral wall 24 of the housing portion 21A is disposed along the irradiation opening 12 of the lighting fixture 10, and the outer peripheral wall 24 cut in parallel to the installation surface of the lighting fixture 10 on which the LED light emitting portion 30 is installed. The cross-sectional shape is substantially the same as the irradiation opening of the luminaire 10.

  The material of the housing portion 21A is not particularly limited, and for example, aluminum die casting, a thin steel plate, or the like can be suitably used. However, considering the weight reduction of the lighting fixture 10 itself, a material having a low density is preferable.

  The partition part 26 </ b> A corresponds to the LED light emitting part 30 and is provided so as to enclose each LED light emitting part 30. In the first embodiment, the central partition portion 26 </ b> A is formed in a hexagonal shape, and six fan-shaped partition portions 26 </ b> A having a curvature along the outer peripheral wall 24 are formed around the periphery.

As shown in FIG. 2, the end cap 22 </ b> A includes a disc portion 221 that covers the lower end surface of the housing portion 21 </ b> A, and a cylindrical portion 222 that is erected from the outer peripheral edge of the disc portion 221.
The inner diameter of the cylindrical portion 222 corresponds to the outer diameter of the outer peripheral wall 24, and the end cap 22A is attached to the lower end portion of the housing portion 21A by fitting the cylindrical portion 222 to the outside of the outer peripheral wall 24.
The end cap 22A can be adhered to the outer peripheral wall 24. However, the end cap 22A can be detachably attached by screws, for example.

The disk portion 221 of the end cap 22A is provided with an opening 223A corresponding to the partition portion 26A of the housing portion 21A (see also FIG. 6A).
The opening 223A is located in the irradiation direction (downward) of the partition portion 26A of the housing portion 21A in a state where the end cap 22A is attached to the housing portion 21A.
Here, in order to obtain higher light collection efficiency with respect to the hexagonal or fan-shaped partition portion 26A, the shape of the opening 223A is a circle that is similar to the emission of the LED light emitting portion 30 (FIG. 6 ( A)).

The attachment portion 23 is a member for attaching the housing portion 21 </ b> A to the lighting fixture 10. The mounting portion 23 of the first embodiment is a cylindrical housing in which the upper end of the housing portion 21A is inserted into the side to which the housing portion 21A is attached (the lower side in FIG. 2) and joined with an adhesive or the like. It has a mounting part 231, and further has a cylindrical instrument mounting part 232 that is externally fitted to the instrument body 11 on the side opposite to the mounting position of the housing part 21 </ b> A (upper side in FIG. 2).
The diameter of the instrument mounting portion 232 is larger than the diameter of the casing mounting section 231, and the instrument mounting section 232 and the casing mounting section 231 are connected by a ring-shaped connecting section 233.
A plurality of screw holes 234 are provided through the outer peripheral surface of the instrument mounting portion 232. Here, for example, three screw holes 234 are provided at equal intervals (see FIG. 1B).

On the outer peripheral surface of the irradiation opening 12 of the instrument main body 11, an attachment groove 15 for attaching the condensing device 20A is provided over the entire circumference.
A circuit board 31 on which a plurality of LED light emitting units 30 are mounted is attached to the inside of the irradiation opening 12 of the instrument body 11. In the first embodiment, seven LED light emitting units 30 are provided and are arranged so that the center of the disk-shaped circuit board 31 and the periphery thereof are divided into six equal parts. The number of the portions 30 and the arrangement pattern thereof are not particularly limited, and may be appropriately adjusted according to a necessary light flux or the like.

As shown in FIG. 3, the LED light emitting unit 30 includes an LED 32 mounted on a circuit board 31 and a lens 33 provided in front (downward) of the LED 32.
The lens 33 encloses the LED 32 and has a downwardly convex hemispherical shape, and has a concave portion 331 at the tip (lower end). For example, an acrylic lens can be used as the lens 33. Therefore, the irradiation light emitted from the LED 32 is condensed by the lens 33 and irradiated downward. The type, shape, and the like of the lens 33 are not particularly limited, and may be determined as appropriate according to applications such as light collection and diffusion. However, it is preferable to use a condensing lens from the viewpoint of further increasing the condensing efficiency.

A method of attaching the condensing device 20A to the lighting fixture 10 will be described.
First, the fixture mounting portion 232 of the mounting portion 23 is externally fitted to the lower end portion of the fixture main body 11 of the lighting fixture 10, and the lower end surface of the fixture main body 11 is brought into contact with the inner surface (upper surface) of the connecting portion 233 of the mounting portion 23. .
Next, the mounting screw 27 is screwed into the screw hole 234 provided on the outer peripheral surface of the instrument mounting portion 232 from the outside, and the tip of the mounting screw 27 is inserted into the mounting groove 15 of the instrument body 11.
Similarly, by screwing a plurality of mounting screws 27 into the screw holes 234, the tips of the mounting screws 27 are locked by the mounting grooves 15, so that the light collecting device 20 </ b> A is securely attached to the lighting apparatus 10.

  As shown in FIG. 4, when the housing portion 21 </ b> A is provided so as to penetrate the attachment portion 23 and the light collecting device 20 </ b> A is attached to the lighting fixture 10, the upper end 211 of the housing portion 21 </ b> A is connected to the LED light emitting portion 30. It is preferable to provide it so that it may approach. Thereby, it is possible to attach 21 A of housing parts to the lighting fixture 10, suppressing the leakage of light. Further, the upper end 211 may be provided so as to approach the circuit board 31 (see FIG. 5).

As shown in FIG. 5, the height dimension H in the longitudinal direction of the condensing device 20A and the diameter dimension D of the opening 223A are the desired beam angles when the light LB1 emitted from the LED 32 is emitted from the opening 223A. What is necessary is just to determine suitably according to the magnitude | size of (theta). Here, the height dimension H of the light collecting device 20 </ b> A means the shortest distance from the surface on which the opening 223 </ b> A from which light is emitted from the installation surface of the LED light emitting unit 30 that contacts the lighting fixture 10 is formed. Further, the diameter dimension D of the opening 223A means the shortest distance of the opening 223A along the plane that passes through the center of the opening 223A and is parallel to the LED light emitting unit 30.
For example, when the beam angle θ of the luminaire 10 is desired to be 10 degrees, the height dimension H of the light collecting device 20A is set to 120 mm <H <130 mm, and the diameter dimension D of the opening 223A is set to about φ13 mm. preferable. Thereby, the emitted light can be obtained while suppressing the loss of light.

  When using the condensing lens 33 as in the first embodiment, the light emitted from the LED light emitting unit 30 is collected by the lens 33 and then the partition 26A inside the condensing device 20A. , And exits from the opening 223A of the end cap 22A. Therefore, it is preferable to determine H and D in consideration of the light collection rate of the lens 33.

The size and shape of the opening 223A are not particularly limited, and the size and shape of each opening 223A may be the same or different. For example, when the center hexagonal partition portion 26A is larger than the surrounding fan-shaped partition portion 26A, the opening 223A provided at the center of the end cap 22A may be larger than the surrounding opening 223A.
However, from the viewpoint of further improving the light collection efficiency, it is preferable that the center in the radial direction of each opening 223 </ b> A is disposed on the main optical axis of the LED light emitting unit 30. In the present invention, the main optical axis of the LED light emitting unit 30 is the direction of light along the direction perpendicular to the light exit surface through the center of the LED light emitting element among the directions of light emitted from the LED light emitting element. An axis.

  On the other hand, as shown in FIG. 6B, the light LB1 emitted from the opening 223A overlaps with the light LB1 emitted from the adjacent opening 223A, and the light collecting shape of the entire lighting fixture 10 is the same as that of each opening 223A. Depends on shape. For example, when the circular opening 223A is formed, as a result of the overlapping of the light LB1, an irradiation shape BR1 close to a hexagon can be obtained as a whole.

The effects of the light collecting device 20A of the present invention will be described.
As shown in FIG. 5, the condensing device 20 </ b> A according to the first embodiment adopting the above-described configuration is a housing portion 21 </ b> A provided so that the light LB <b> 1 from the LED light emitting unit 30 includes each LED light emitting unit 30. Irradiated into the partition portion 26A. The light LB1 emitted from the LED light emitting unit 30 is emitted through the opening 223A while passing through the long cylindrical partition 26A. The partition 26A is provided so as to enclose each LED light emitting unit 30. Therefore, the leakage of the light LB1 to the outside is suppressed. Further, irradiation is performed by improving the light collection efficiency by passing through the long cylindrical partition part 26A whose height and the size of the opening 223A are optimized according to the beam angle of the LED light emitting part 30. Is also possible.

  Moreover, like 1st Embodiment, the outer peripheral wall 24 of 21 A of housing | casing parts is arrange | positioned along the irradiation opening 12 of the lighting fixture 10, and it is parallel with respect to the installation surface of the lighting fixture 10 in which the LED light emission part 30 was installed. If the cross-sectional shape of the outer peripheral wall 24 cut into two is formed to be substantially the same as the irradiation opening of the lighting fixture 10, light emitted from the LED light emitting unit 30 is emitted to the housing unit 21A without leaking. In addition, it is possible to suppress a decrease in luminous flux while ensuring high light condensing performance.

  From the viewpoint of improving the light collection efficiency, it is desirable that the inner wall 25A (that is, the inner surface of the partition portion 26A) be processed to reflect light. Specific examples include vapor deposition of a highly reflective metal or embossing, but are not particularly limited.

  Further, as in the first embodiment, a screw hole 234 is provided on the outer peripheral surface of the instrument mounting portion 232 formed so as to protrude in the light irradiation direction, and is further substantially orthogonal to the light irradiation direction. If the mounting screw 27 is screwed so as to be parallel to the radial direction of the housing portion 21 </ b> A, even if the mounting screw 27 is loosened, the mounting screw 27 may fall directly below the lighting fixture 10. As a result, the possibility that the condensing device 20A falls from the lighting fixture 10 can be reduced as a result.

  In addition, in 1st Embodiment, although the form which attaches housing | casing part 21A to the lighting fixture 10 was shown through the fixture attachment part 232, the attachment method is not specifically limited. For example, an engagement mechanism may be provided for both the irradiation opening 12 and the housing portion 21 </ b> A of the lighting fixture 10, and the housing portion 21 </ b> A may be directly attached to the lighting fixture 10.

(Second Embodiment)
Next, the condensing device of 2nd Embodiment which concerns on this invention is demonstrated.
In addition, the same code | symbol is attached | subjected to the site | part which is common in the condensing apparatus 20A of 1st Embodiment mentioned above, and the overlapping description is abbreviate | omitted.

As shown in FIG. 7A, the light condensing device 20B of the second embodiment has a partition portion 26B that is different from the shape of the partition portion 26A (see FIG. 2) in the first embodiment.
That is, the partition portion 26A of the first embodiment is formed in a hexagonal shape or a fan shape by the thin plate-like inner wall 25A, but the partition portion 26B of the second embodiment is formed in a circle by the inner wall 25B. .
The casing portion 21B can be formed by aluminum die casting. However, since the weight of the light collecting device 20B increases as the inner wall 25B becomes thicker, it is desirable not to increase the thickness of the inner wall 25B too much.
Thereby, since the shape of the partition part 26B respond | corresponds to the shape of the LED light emission part 30, light loss can be reduced further and condensing efficiency can be improved.

Since the end cap 22B has a circular opening 223B like the end cap 22A of the first embodiment, the irradiation shape BR2 is the same as the irradiation shape BR1 of the first embodiment (see FIG. 7B).
In addition, when the inner diameter of the opening 223B is larger than or equal to the inner diameter of the partition portion 26B, the presence of the end cap 22B is not significant, so the inner diameter of the opening 223B is set smaller than the inner diameter of the partition portion 26B.

The condensing devices 20A and 20B of the present invention are not limited to the above-described embodiments, and appropriate modifications and improvements can be made.
For example, in each of the above-described embodiments, the irradiation shapes BR1 and BR2 in which a plurality of circles are combined are illustrated, but other irradiation shapes are also possible.

That is, in FIG. 8A, the opening shape 223C of the end cap 22C is formed in a hexagonal shape, and an irradiation shape BR3 that includes the seven openings 223C is obtained.
Further, in FIG. 8B, the irradiation shape BR4 is formed such that the opening 223D of the end cap 22D is formed in a triangle and the seven openings 223D are included.
Further, in FIG. 8C, the irradiation shape BR5 is formed such that the opening 223E of the end cap 22E is formed in a square shape and the seven openings 223E are included.
Furthermore, the shape of the opening can be changed to other shapes in accordance with the required irradiation shape.

  In each of the embodiments described above, the number of the partition portions 26A, 26B and the number of the openings 223A, 223B,... 223E of the end caps 22A, 22B,. is not.

DESCRIPTION OF SYMBOLS 10 Lighting fixture 11 Appliance main body 12 Irradiation opening 20A, 20B Condensing apparatus 21 Housing | casing part 22A, 22B, 22C, 22D, 22E End cap 223A, 223B, 223C, 223D, 223E Opening 24 Outer peripheral wall 25A, 25B Inner wall 26A, 26B Partition part 30 LED light emitting part

Claims (5)

A light collecting device attached to an irradiation opening of a lighting fixture having a plurality of LED light emitting units,
A cylindrical housing attached so as to protrude in the irradiation direction of the LED light emitting part;
An end cap that covers the irradiation direction side end of the housing part,
The housing portion is
An outer peripheral wall containing the plurality of LED light emitting units;
The inner wall defining the inside of the outer peripheral wall corresponding to each of the LED light emitting portions,
The condensing device which the said end cap has an opening which radiate | emits the light emitted from each said LED light emission part for every division part divided by the said inner wall , and is arrange | positioned in contact with the said inner wall . The light collecting device according to claim 1,
A condensing device in which the radial center of the opening is disposed on the optical axis of the LED light emitting unit. In the condensing device according to claim 1 or 2,
The said housing | casing part is a condensing apparatus with which the cross-sectional shape cut | disconnected in parallel with respect to the installation surface of the said LED light emission part is substantially equivalent to the irradiation opening of the said lighting fixture. In the condensing device according to any one of claims 1 to 3,
In the case where the plurality of LED light emitting units include a first LED light emitting unit located at the radial center of the lighting fixture and a second LED light emitting unit arranged to surround the first LED light emitting unit. The condensing device in which the shape of the partition part of the first LED light emitting part is a regular polygon. At least the light collecting device according to any one of claims 1 to 4,
A lighting fixture comprising a plurality of LED light emitting units.

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