JP6080713B2 - LED lighting device - Google Patents

Description

  The present invention relates to an LED lighting device using an LED element as a light source.

2. Description of the Related Art In recent years, with increasing environmental awareness, LED lighting devices using LED elements with excellent power savings as light sources have been actively used. LED lighting devices have been used for various purposes, and for example, they are increasingly used as spotlights for illuminating food. However, the LED lighting device often uses a white LED, and the color rendering property is inferior in the vicinity of red near 700 nm. Therefore, it is difficult to faithfully express the color of food when shining fresh food. Therefore, there are LED spotlights that are applied to meat, fresh fish, and the like that have improved color rendering using a light source in which white LEDs and red LEDs are mixed.

For example, in the LED lighting apparatus described in Patent Document 1, a configuration in which a plurality of white LEDs and red LEDs having different color temperatures are provided and light from the LEDs is mixed is disclosed. Yes.
In addition, the LED illumination device described in Patent Document 2 discloses a configuration in which a plurality of white LEDs and one or a plurality of red LEDs are provided, and the white LEDs are arranged around the red LEDs.

JP 2012-003098 A Patent No. 4399663

However, in the LED lighting device described in Patent Document 1, since the cone portion at the tip of the lighting device is provided so as to cover the side surface portion of the lighting device, the light from the LED light source is applied to fresh food. Light from the LED light source is not emitted to the side surface side. For this reason, when considering use as a spotlight for fresh food, there is an effect that can express the freshness of fresh food faithfully, but the spotlight light is not emitted to the side, so consumers who purchase fresh food It is difficult to determine from a distance where the fresh food section is.
Also in the LED lighting device described in Patent Document 2, since a similar configuration is disclosed, it is still difficult for the consumer to specify the fresh food counter.

The present invention has been made as a result of intensive studies to solve the above problems,
For example, the present invention provides an LED lighting device that can recognize a place where fresh food is illuminated from a distance.

In order to solve the above-described problems, an LED lighting device according to the present invention includes a power supply unit that houses a power supply circuit that supplies power to an LED element, an LED board on which the LED element is mounted, and a cylindrical shape that houses the LED board. comprising of a housing, an arm portion for connecting the power supply unit and the housing, and a translucent shade cylindrical that provided at the distal end located in the light emitting direction of the LED elements in the housing, translucent The seed has a first scattering portion and a second scattering portion that scatter light emitted from the LED element, the first scattering portion is located on the housing side, and the second scattering portion is the first scattering portion. The first scatterer and the second scatterer have a shape that scatters light so that the first scatterer and the second scatterer have different scattering rates. Provided differently, the first scattering portion and the second scattering portion are arranged along the circumferential direction. It has unevenness with different intervals .

In addition, the first scattering portion may have an interval of unevenness shorter than that of the second scattering portion.

At least one of the first scattering portion and the second scattering portion may have irregularities in the axial direction over the entire circumference.

According to the present invention, together with light emitted et or L ED element is emitting light to the outside through the translucent shade, by which light is scattered by the scattering portion, the position of the spotlight from a distance It becomes easy to recognize.

External view of LED lighting device according to this embodiment It is a three-plane figure of the LED illuminating device concerning this embodiment, (a) is a front view, (b) is a side view, (c) is a rear view. Sectional drawing of the lower half of the spotlight part of the LED lighting apparatus concerning this embodiment Sectional drawing of the power supply part of the LED lighting apparatus concerning this embodiment The exploded perspective view which looked at the spotlight part of the LED lighting device concerning this embodiment from the upper part It is a perspective view of the translucent shade of the LED lighting apparatus concerning this embodiment, (a)-(d) has shown another embodiment, respectively. The top view of the connection part of the LED lighting apparatus concerning this embodiment The perspective view of the connection part of the LED lighting apparatus concerning this embodiment

Preferred embodiments of the present invention will be described below with reference to the drawings. This embodiment is an example, and the present invention is not limited to this.

The LED lighting device 100 according to the present embodiment includes a spotlight unit 1, an arm unit 2, and a power supply unit 3 as shown in FIG. 1, and is used by being attached to a duct rail 4 attached to a ceiling. The attachment of the duct rail 4 is not limited to the ceiling, and may be a wall or a floor.

As shown in FIG. 5, the spotlight unit 1 includes a housing 15, an LED substrate 13 that is fixed to the front surface of the housing 15 by a screw 22 via an insulating sheet 16 that has heat dissipation, and the LED A condensing lens 17 is provided so as to cover the substrate 13 and is fixed to the housing 15 with screws 23, and is attached to the front end edge of the housing 15 to cover the front outer peripheral portion of the LED substrate 13 and the condensing lens 17. The translucent shade 14 which can do is provided. The translucent shade 14 is attached from the rear of the housing 15. Attachment is realized by screwing the translucent shade 14 and the housing 15 together. The attachment method is not limited to screwing, but may be inset or adhesion. Further, the translucent shade 14 may be attached from the front of the housing 15.

Fig.2 (a) is the front view which looked at the LED lighting apparatus 100 from the front. LED board 13
Includes a plurality of white LED elements 11 (first LED elements) and a plurality of red LED elements 12 (second
LED element) is mounted on the LED substrate 13, and the object is illuminated by emitting light toward the front side of the sheet. A translucent shade 14 is provided around the LED substrate 13 to scatter part of the light emitted from the LED elements 11 and 12 and scatter the light in the front direction of the paper. As a result, the side surface of the translucent shade 14 emits a so-called “glitter” with the light of the LED element, and the visibility from a distance is improved.

The LED substrate 13 may have a white resist layer in order to efficiently emit the light emitted from the LED elements 11 and 12. Moreover, the arrangement | sequence form and arrangement number of the white LED element 11 and the red LED element 12 can be arbitrarily selected according to an installation place etc. Here, the white LED element 11 and the red LE
Although the D element 12 is used, other light emitting color LED elements having different color wavelengths may be used depending on the installation location or the like.

The casing 15 is formed in a substantially semi-cylindrical shape as a whole, and a front end is formed in a disc shape. The heat sink 15 for radiating heat generated in the LED elements 11 and 12 is formed in the barrel.
a (see FIG. 2C) is formed. The heat sink 15a is formed in a plate shape (fin shape) in order to increase the surface area, but as shown in FIG. 2C, a part of the column portion 15b is provided. This is because heat is transmitted to the entire heat sink 15a by facilitating the transfer of heat generated from the LED elements 11 and 12, thereby increasing the efficiency of heat dissipation. Further, an arm part 2 described later is attached to the casing 15 via a joint part 21.

The casing 15 is made of aluminum, but is not limited to a metal material, and a heat conductive resin filled with a heat conductive pigment may be used. In this case, the heat dissipating insulating sheet 16 may not be provided between the LED substrate 13 and the housing 15. Moreover, although the housing | casing 15 and the heat sink 15a are integrally formed in a present Example, you may be comprised by a separate member.

As described above, the front surface portion (outgoing light side) of the casing 15 has the L through the heat-radiating insulating sheet 16.
The ED substrate 13 is disposed, and the condensing lens 17 is disposed on the front surface portion (main emission side) of the LED substrate 13.
The insulating heat dissipation sheet 16 efficiently transmits heat generated in the LED elements 11 and 12 to the housing 15 and insulates the LED substrate 13 from the housing 15 to prevent a circuit on the LED substrate 13 from being short-circuited. doing.
The condensing lens 17 is provided to collect light emitted from the LED elements 11 and 12 in the emission direction. The condensing lens 17 includes a wall portion 17a surrounding the periphery and a convex portion 17b provided corresponding to a position where the LED elements 11 and 12 are mounted. The convex part 17b has an LED
A concave portion 17c is formed so that the elements 11 and 12 are stored in the convex portion, and the LED elements 11,
12 has a shape that fits inside. The light emitted from the LED elements 11 and 12 is collected in the emission direction by the convex portion 17b of the condenser lens 17, so that the light travels in the emission direction as compared with the case where the condenser lens 17 is not provided.

The translucent shade 14 is formed in a hood shape as a whole and scatters the light emitted from the LED elements 11 and 12, and therefore, as shown in FIG. A scattering portion 18 is formed. Further, in order to more effectively scatter, the second scattering portion 19 may be formed on the inner surface portion of the outgoing light side edge portion of the translucent shade 14.
In FIG. 3 (b), the first scattering portion 18 is formed on a part of the translucent shade 14 (inner surface inner portion), but may be formed on the entire inner surface of the translucent shade 14. In addition, the casing 15 can be scattered so that light emitted from the LED elements 11 and 12 in a direction parallel to the LED substrate 13 can be scattered.
The first scattering portion 18 may be formed up to the portion where the light-transmitting shade 14 contacts.

Furthermore, in the present embodiment, the first scattering portions 18 and 19 are formed on the translucent shade 14.
You may attach the scattering part formed with the member different from the translucent shade 14 to the translucent shade 14.

FIG. 6 shows various shapes of the scattering portion 18 and the second scattering portion formed on the translucent shade 14. The scattering portion 18 in FIG. 6A is formed such that a facet 18a having a triangular cross section and a facet 18b having a trapezoidal cross section are continuous in the inner peripheral surface direction. The second scattering portion 19 is formed such that the facets having a triangular cross section are continuously formed on the inner peripheral surface portion of the tip. By providing the second scattering portion 19,
It becomes possible to scatter more light. In addition to the triangular prism, the second scattering portion may have a semicircular or polygonal cross section, as long as it has a shape that scatters light.

6B has a smaller facet area than the first scattering portion 18 in FIG. 6A, and FIG.
The example which further formed the acicular scattering part 18c in the front side of the scattering part 18b of a) is shown. FIG.
The first scattering portion 18 in (c) is formed by forming irregularities in a quadrangular pyramid shape. As shown in FIG. 6 (d), the shape of the square pyramid may be reduced.

The arm part 2 connects the spotlight part 1 and the power supply part 3 and has a joint part 21 (FIG. 2) in the middle of the arm part 2. The joint portion 21 can adjust the light emission direction of the spotlight portion in the vertical direction. Further, the spotlight unit 1 can be rotated in the horizontal direction by the connecting part 22 provided in front of the arm part 2 and the power supply part 3, and the spotlight part 1 in the vertical and horizontal directions between the joint part 21 and the connecting part 22. Can be adjusted.

7 and 8 illustrate the connection portion 22 used when the arm portion 2 and the power supply portion 3 are connected. The connection part 22 is overlapped with a first disk part 25 having a through hole 28 at the center and a second disk part 26 having a diameter smaller than that of the first disk part 25 and having the through hole as a common central axis. It consists of different shapes. The connection part 22 is attached to the power supply part 3 on the first disk part 25 side so as to be rotatable. Further, the arm portion 2 is attached to the second disc portion side 26 by inserting a rotating shaft provided in the arm portion 2 into the disc portion 26 so as to be rotatable.

As shown in FIG. 7, the first disk portion 25 is provided with a notch 26a having a central angle of α degrees so that the protrusion 27 provided on the power supply unit 3 interferes with the notch 26a. Be placed.
The rotation range of the connecting portion 22 is limited to α degrees by the protruding portion 27 and the cutout portion 26 a of the first disk portion 25.
Further, the second disk part 26 is provided with a notch part 25a having a central angle of β degrees, and the arm part 2 is rotated by the arm part 2 and the notch part 25a of the second disk part 26. The range is limited to β degrees. At this time, each value is selected so that α + β> 360 °.

The rotation range of the arm part 2 and the rotation range of the connection part 22 itself are independently rotated by the notch part 25a provided in the first disk part 25 and the notch part 26a provided in the second disk part 26. Therefore, the rotation angle of the spotlight unit 1 with respect to the power supply unit 3 is α + β degrees. As described above, since there is a relationship of α + β> 360 °, the rotation range of the spotlight unit 1 can be moved more than 360 degrees, and no blind spot is generated in the range where the illumination can be used.

The power supply unit 3 includes a terminal-attached portion 31a. The power supply unit 3 is fixed to the duct rail 4 by the attachment portion 31a, and the power source unit 3 described later is provided via the power supply terminal-attached portion 31a.
Power is supplied to an internal power supply board (not shown).

The power supply unit 3 converts the AC power input from the terminal-attached mounting portion 31a into a DC power source. A power supply board (not shown) on which a conversion circuit for converting AC power into DC power is mounted is built in the power supply unit 3. The side surface of the power supply unit 3 is corrugated. This is to efficiently dissipate the heat generated inside. Above the power supply unit 3, a mounting portion 31 a with terminals and mounting portions 31 b and 31 c are provided from the front side. These mounting portions 31a, 31b,
The LED lighting device 100 is fixed to the duct rail 4 by attaching 31c to the duct rail 4. In the present embodiment, the terminal-equipped attachment portion 31a is provided on the front side, but the position is not particularly limited. Further, in the present embodiment, there are three attachment portions, but the LED lighting device 1
Since it is sufficient that 00 can be fixed to the duct rail 4, the number of attachment portions is not limited to three.

A cross-sectional view of the power supply unit 3 along BB in FIG. 4A is illustrated as FIG. Power supply 3
Is provided with a power supply board 20 on which a conversion circuit for converting AC power input from the terminal-attached attachment portion 31a into DC power is mounted. The power supply substrate 20 is disposed in the power supply unit 3 in a state surrounded by the insulating sheet 20a.

As described above, according to the present embodiment, it is possible to provide an LED illumination device that irradiates light with good color rendering properties and can be recognized from a distance by scattering of light by a scattering portion provided in the shade. .

  (Other)
  The technical ideas other than the invention described in the claims, which can be grasped from the above embodiment, will be described below together with the effects.
  (A) A casing having a connection portion with a power supply section, a first LED element, and a second LED element having a wavelength different from that of the first LED element, disposed on the outgoing light side of the casing And a translucent shade provided on the outgoing light side of the housing and having a scattering portion for scattering the outgoing light of the LED element.
  (B) The light-transmitting shade scattering portion is integrally formed with the shade.
  (C) A heat-dissipating insulating sheet is provided between the LED substrate and the housing.
  (D) The housing is formed with a heat sink.
  (E) A condensing lens is provided so as to cover the outgoing light side of the LED substrate.
  (F) The light-transmitting shade scattering portion has a polyhedral shape.
  (G) The translucent shade has a quadrangular pyramid shape.
  (H) The light-transmitting shade scattering portion has a microlens array shape.
  (I) The second scattering portion is provided at an end edge portion on the outgoing light side of the translucent shade.
  (J) a casing having a connection portion with a power supply section; a first LED element disposed on the outgoing light side of the casing; and a second LED element having a wavelength different from that of the first LED element A spotlight part having an LED substrate mounted thereon, a translucent shade provided on the outgoing light side of the casing and having a scattering part for scattering the outgoing light of the LED element, and the spotlight part It has a power supply part which supplies electric power, an arm part connected to the spotlight, and a connection part that rotatably connects the arm part and the power supply part.
  (K) The power supply unit and the arm unit are further connected to each other so as to be rotatable, and the rotation range is larger than 360 degrees.
  (L) The connecting portion has a first disk portion having a through hole and a notch portion having a central angle α, a diameter smaller than that of the first disk portion, and a notch portion having a central angle β. It consists of the 2nd disk which makes a through-hole a common central axis, It is characterized by the above-mentioned.
  (M) The central angle α and the central angle β have a relationship of α + β> 360 °.

According to the technical idea described in (A) above, the light emitted from the first LED element and the second LED element is emitted to the outside through the translucent shade, and the light is emitted from the scattering portion. Scattering makes it easy to recognize the position of the spotlight even from a distance.
According to the technical idea described in (B) above, the translucent shade and the first scattering portion are separately formed by forming the translucent shade and the first scattering portion from the same member. Therefore, since it can be integrally formed, the processing becomes easy and the cost for the processing can be suppressed.
  According to the technical idea described in (C) above, the heat generated when the LED element emits light by interposing an insulating heat dissipation sheet between the LED board on which the LED element is mounted and the housing. It can be efficiently transmitted to the housing side, and further, deterioration of the LED element due to heat can be prevented.
According to the technical idea described in (D) above, it is possible to efficiently dissipate heat generated when the LED element emits light by forming the heat sink in the housing through the heat sink.
According to the technical idea described in the above (E), it is possible to illuminate the object to which the light is applied brighter by collecting the light emitted from the LED element in the emission direction by providing the condenser lens. .
According to the technical idea described in the above (F), (G), or (H), the scattering portion is formed into a polyhedral shape, a quadrangular pyramid shape, or a microlens shape, and the translucent shade is made uneven. Thus, it is possible to easily form the scattering portion.
According to the technical idea described in (I) above, by providing the second scattering portion at the edge of the light-transmitting shade on the outgoing light side, the light emitted from the LED element is scattered by the scattering portion. Visibility can be further improved because the light can be scattered in a different direction.
According to the technical idea described in the above (J), (K), (L), or (M), the connecting part in which the spotlight part having the translucent shade rotates 360 degrees or more with respect to the power supply part By providing, it becomes possible to turn the spotlight part without a blind spot.

DESCRIPTION OF SYMBOLS 100 LED illuminating device 1 Spotlight part 2 Arm part 3 Power supply part 4 Duct rail 11 1st LED element 12 2nd LED element 13 LED board 14 Translucent shade 15 Case 15a Heat sink 15b Cylindrical part 16 Insulation heat dissipation sheet 17 Condensing lens 17a Wall portion 17b Convex portion 17c Concavity 18 First scattering portion 18a First triangular facet 18b Trapezoidal facet 18c Second triangular facet 19 Second scattering portion 20 Power supply substrate 20a Insulation Sheet 21 Joint portion 22 Connection portion 23, 24 Screw 25 First disc portion 25a Notch portion 26 Second disc portion 26a Notch portion 27 Protrusion portion 28 Through hole 31a Attachment portion 31b, c Attachment portion 32 Power supply board

Claims (2)

An LED lighting device using an LED element,
A power supply unit that houses a power supply circuit that supplies power to the LED element;
An LED substrate on which the LED element is mounted;
A cylindrical housing in which the LED substrate is accommodated;
An arm for connecting the power supply and the housing;
A cylindrical translucent shade provided at a tip edge located in the light emitting direction of the LED element in the housing;
With
The translucent shade, in a cross-sectional view including the central axis of the translucent shade, at least a part of the inner peripheral surface protrudes along the light emitting direction of the LED element,
A first scattering portion that scatters light emitted from the LED element; and a second scattering portion, wherein the first scattering portion is located on the housing side, and the second scattering portion is the first scattering portion. The first scatterer and the second scatterer scatter light so that the first scatterer and the second scatterer are located in the light emission direction from the scatterer and have different scattering rates. The shapes to be made are different,
The LED lighting device, wherein the first scattering portion and the second scattering portion are formed on a part of the translucent shade and have irregularities with different intervals along the circumferential direction.   2. The LED lighting device according to claim 1, wherein the first scattering portion has an interval of unevenness shorter than that of the second scattering portion.