JP2019067571A - LED lighting unit and line type base lighting fixture - Google Patents

Abstract

To provide an LED lighting unit that is so structured to reduce glossiness.SOLUTION: The present invention relates to an LED lighting unit 10, which has a substrate 20 mounted with an LED element 21, a control lens 30 having a projection part 32 formed to cover the LED element 21, and a louver 40 having a light shield part 41 covering an outer peripheral side face of the projection part 32 of the control lens 30. The light shield part 41 is provided with a bottom wall 43 which has an opening part 42 formed at one end part and a hole part 43a, into which the projection pa rt 32 of the control lens 30 is inserted, bored in the other end part opposed to the opening part 42, and also provided with a side wall 44 extending from the bottom wall 43 to an edge part of the opening part 42. The control lens 30 is configured to convert light from the LED element 21 into projection light L1 having a predetermined angle and then output the projection light, and an outer edge of the projection light L1 emitted from the control lens 30 and having the predetermined angle is in contact with an inner edge 44a1 of the side wall 44 of the louver 40.SELECTED DRAWING: Figure 6

Description

  The present invention relates to an LED lighting unit and a line-type base lighting device on which the LED lighting unit is mounted.

  An LED (Light Emitting Diode) is a light source that consumes low power, has a long life, and can ensure high brightness, and thus is a light source for various lighting fixtures such as office and facility base lighting fixtures, down lights, desk stands, etc. It is used as For example, Patent Document 1 proposes a configuration of a line type lighting apparatus in which an LED lighting module is mounted. Further, Patent Document 2 proposes a line type LED module which is detachably attached to a power supply duct rail (wiring duct) provided on a ceiling.

The LED illumination light module of Patent Document 1 is configured such that a plurality of LEDs can be arranged in a straight line to illuminate over an elongated range.
Specifically, the above-described LED lamp module includes an elongated substrate, LEDs mounted at predetermined intervals in the longitudinal direction of the substrate, and a cap body (lens) provided so as to cover each LED. ing. Further, the above-mentioned line type lighting apparatus has a configuration in which the above-mentioned LED lamp module is continuously disposed in the longitudinal direction of the above-mentioned substrate on a base body made of aluminum etc., and the LED lamp module The irradiation surface is covered with a longitudinally extending cover (a transparent or frosted glass or resinous cover).

  The line-type LED module described in Patent Document 2 is configured by an LED lighting fixture in which a large number of LEDs are arranged in a line, and a central portion in the line direction with respect to a feeding duct rail of a ceiling A joint unit is provided which is detachably mounted.

JP, 2012-28205, A JP, 2011-108489, A

However, the above-mentioned prior art lighting apparatus uses an LED having a characteristic of emitting light with high brightness as a light source, and therefore, when the light emitting part of the lighting apparatus enters the field of view of the user, it feels extremely dazzling It has the technical problem of In particular, lighting fixtures that are installed at locations where the lighting unit of the lighting fixture goes into sight when the user looks up, such as a base lighting fixture attached to the ceiling of a facility, a desk stand, etc. Also, the user may feel dazzling, which is uncomfortable for the user.
In addition, although the desk stand etc. which used LED as a light source covered the front of LED with a white cover, many users also feel dazzling about the emitted light of LED seen from the top of a cover.

  The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide an LED lighting unit having a structure with reduced glare and a line-type base lighting apparatus on which the lighting unit is mounted. is there.

  The present invention made to solve the above problems is an LED lighting unit, which is a substrate on which an LED element is mounted, a control lens in which a convex portion covering a light emitting portion of the LED element is formed, and the control And a louver having a light shielding portion covering an outer peripheral side surface of the convex portion of the lens, wherein the light shielding portion of the louver has an opening formed at one end, and the other end opposite to the opening. A bottom wall provided with a hole into which the convex portion of the control lens is inserted is provided, and a side wall extending from the bottom wall to the edge of the opening at the one end is provided, and the inner side surface of the side wall is The control lens surrounds and covers the outer peripheral side surface of the convex portion, and the control lens is inserted from the light emitting portion of the LED element while the convex portion is inserted into the hole of the bottom wall of the louver. Light is converted into light of a predetermined angle and emitted from the convex portion Has become so doing, the outer edge of the emitted light of a predetermined angle which is emitted from the control lens is in contact with the inner edge of the side wall of the one end portion of the louver, characterized in that said louver is formed.

  As described above, in the LED lighting unit of the present invention, the outer peripheral side surface of the control lens that converts the light from the LED element (light of high brightness) into the emitted light of a predetermined angle and emits it is covered with a louver, and the user controls The lens is blocked by the louver, making it difficult to see. Therefore, when the LED lighting unit is mounted on a lighting fixture, when the user looks up the lighting fixture, the area in which the control lens that emits the high-intensity emitted light directly enters the field of view is limited. For example, the control lens enters the direct view only when the user looks up at the LED lighting unit from a limited area, such as directly under the LED lighting unit. As a result, the user feels dazzled only when the control lens is in the "limited area (a limited area immediately below the control unit, etc.)" directly entering the field of view, and the control lens is louver outside the limited area. You do not feel dazzling because you can not see it because it is blocked (because the control lens does not directly enter the field of view). That is, the LED lighting unit of the present invention is configured to reduce glare.

Further, in the present invention, the louver is formed such that the outer edge of the emission light of the predetermined angle emitted from the control lens is in contact with the inner edge of the side wall at one end of the louver.
According to this configuration, most of the light of “emitted light of a predetermined angle” emitted from the control lens of the LED lighting unit can be irradiated from the louver to the illumination target area without being blocked by the louver. That is, according to the present invention, it is possible to effectively irradiate the illumination target area with light emitted by the light emitting unit of the LED element while being provided with a louver which prevents the user from feeling dazzled. Light can be reduced as much as possible.

  Further, the inner side surface of the side wall of the louver is a high reflection / low diffusion surface that reflects light highly and diffuses the light, and from the control lens, miscellaneous light is emitted in addition to the light emitted at the predetermined angle. It is preferable that the miscellaneous light be reflected by the inner side surface and be irradiated from the opening.

The reason for adopting this configuration is as follows. Specifically, the light from the LED lighting unit “is emitted from the light emitting portion of the LED element and is incident on the incident portion (effective incident surface) of the control lens, converted by the control lens, and output to the emitting portion (effective emission surface) The light is classified into "emission light" emitted from the light source and "minor light" other than "emission light". "Miscellaneous light" means "scattered light in the LED element and in the control lens", "light passing through other than the effective surface (effective incident surface, effective emission surface) of the control lens", "light emitting surface of the LED element And reflected light (which is emitted with multiple reflections) on both sides of the control lens.
And since the inner side surface of the side wall of the louver is configured as a high reflection and low diffusion surface, the above-mentioned miscellaneous light can be efficiently reflected without waste, and the miscellaneous light reflected together with the above-mentioned emitted light Can be emitted from the opening of the louver. That is, according to the present invention, the miscellaneous light generated due to the structure of the LED lighting unit can be efficiently used.

Preferably, the inner side surface of the side wall of the louver is formed so as to reflect the miscellaneous light so as to fall within the range between the left and right two glare cut-off lines in side view.
According to this configuration, the small amount of miscellaneous light is also blocked by the louver, and it becomes difficult for the user to directly enter the user's vision, thereby reducing the possibility of the user being dazzled.

Moreover, it is desirable that the louver be formed in black.
According to this configuration, the louver itself absorbs light (for example, because the louver does not appear to be emitting light like a white louver), the user does not feel dazzling even when looking at the louver.

  In the convex portion of the control lens, the outer peripheral portion has a substantially truncated pyramid shape, and the top surface thereof is formed in a substantially arc convex shape, and the light shielding portion of the louver has a plan view of the opening portion. It is preferable that the inner side surface is formed in a parabolic shape, and the inner side surface is formed in a parabolic shape.

In the present invention, the outer edge of the emitted light of the predetermined angle emitted from the control lens is in contact with the inner edge of the side wall of one end of the louver. Therefore, by forming the convex portion of the control lens in a substantially truncated pyramid shape and forming the apex in a circular convex shape, and forming the opening of the louver in a polygonal shape in plan view, the cross section from the opening of the louver It can be irradiated with polygonal light. For example, when the convex portion of the control lens is formed into a substantially square frustum shape and the opening of the louver is formed into a square in plan view, light having a square cross section can be emitted from the opening of the louver.
Further, since the inner side surface of the side wall of the louver is formed in a parabolic shape, the above-mentioned miscellaneous light can be picked up without waste and used as light to be irradiated to the area to be illuminated.

  The present invention is the line type base luminaire provided with the LED lighting unit, wherein the substrate is formed in an elongated plate shape, and a plurality of the above-mentioned substrates are arranged on a straight line along the longitudinal direction. LED elements are arranged in a row at a predetermined interval, the control lens is provided for each of the LED elements, the light shielding portion of the louver is provided for each of the control lenses, and the LED lighting unit is further provided. And a main body portion that holds and accommodates.

  According to this configuration, it is possible to provide a line-type base illumination device capable of emitting line-shaped light (for example, light of a rectangular cross section) and having a structure with reduced glare. .

  According to the present invention, it is possible to provide an LED lighting unit of a structure with reduced glare and a line-type base lighting apparatus on which the LED lighting unit is mounted.

It is a schematic diagram which showed the line type | mold base base lighting fixture in which the LED lighting unit of embodiment of this invention was mounted, (a) is a schematic drawing which showed the side of a line type | mold base lighting fixture, (b) It is the schematic diagram which looked at the line type base lighting fixture from the downward direction. It is a perspective view of the LED lighting unit of embodiment of this invention. It is the schematic diagram which showed the cross section of the longitudinal direction of the LED lighting unit of embodiment of this invention. It is the schematic diagram which looked at the LED lighting unit of embodiment of this invention from the downward direction. It is the schematic diagram which showed the cross section of the transversal direction of the LED lighting unit of embodiment of this invention. It is a schematic diagram for demonstrating the relationship between the emission light and miscellaneous light radiate | emitted from the LED lighting unit of embodiment of this invention, and the louver of LED lighting unit.

Hereinafter, an LED lighting unit 10 according to an embodiment of the present invention and a line type base lighting fixture (hereinafter, simply referred to as “base lighting fixture”) W on which the LED lighting unit 10 is mounted will be described with reference to the drawings.
First, a schematic configuration of the base lighting device W of the present embodiment will be described with reference to FIGS.

  As shown in FIG. 1, the base lighting device W of the present embodiment is a main body 1 (substantially box-like main body 1) formed in a U-shape elongated in cross-sectional view in a longitudinal direction (X direction in FIG. 1). The power supply unit (not shown) for supplying power to the LED lighting unit 10 (see FIG. 1B) and the LED lighting unit 10 is housed inside the main body unit 1. Further, a plug 3 detachably connected to the wiring duct (writing rail) D is provided in a substantially central portion (central portion in the longitudinal direction) of the main body portion 1. The plug 3 is electrically connected to the power supply unit (not shown) described above.

Further, the main body 1 has an upper surface 1a having a rectangular shape in a plan view, and a pair of side surfaces 1b bent downward at substantially right angles from both edges in the longitudinal direction of the upper surface 1a. Is formed in an open U-shaped cross section. Further, the main body portion 1 is formed with a recessed portion 1c which is recessed in a central portion in the longitudinal direction, and the plug 3 is provided in the recessed portion 1c.
The main body 1 is formed of, for example, a metal such as stainless steel or a synthetic resin.

In addition, as shown in FIGS. 2 to 4, in the LED lighting unit 10, each of the LED elements 21 includes the LED substrate 20 on which a plurality of LED elements (LED chips) 21 (see FIG. 3) are arranged in a straight line. And a louver 40 having a light shielding portion 41 covering the outer peripheral side surface of each control lens 30.
In the example shown in FIG. 1, the two LED lighting units 10 are arranged at predetermined intervals in the longitudinal direction of the main body 1, but the number of LED lighting units 10 is appropriately designed. is there.
The configuration of the LED lighting unit 10 will be described in detail later.

Further, the above-described wiring duct D is attached to, for example, the ceiling or the like of a facility such as a residence or a store and is used. And if the plug 3 is attached and connected to the desired position of the wiring duct D attached to the ceiling, the base lighting fixture W will be attached to the desired position of the wiring duct D.
In addition, the wiring duct D is formed in a long rectangular tube shape having an opening formed at the center of the lower surface, and a feed terminal (not shown) for supplying power to the base lighting fixture W is elongated in the tube and on both sides thereof. It is provided along the direction.

Further, on the upper end side, the plug 3 is provided with a fitting portion (not shown) which is detachably fitted to the opening at the center of the lower surface of the wiring duct D. The fitting portion is provided with a power receiving terminal (not shown) that contacts the power feeding terminal of the wiring duct D when inserted into the wiring duct D and receives power supplied from the power feeding terminal. .
Then, when the plug 3 is attached to and connected to the wiring duct D, the power from the power supply terminal of the wiring duct D is supplied to the power supply unit (not shown) accommodated inside the main body 1 via the plug 3 The power from the power supply unit is supplied to the LED lighting unit 10, the LED lighting unit 10 emits light, and light is emitted from below the main body unit 1.

Next, the specific configuration of the LED lighting unit 10 will be described with reference to FIGS. 2 to 4 described above and FIGS. 5 and 6.
Here, FIG. 5 is a schematic view showing a cross section in the short direction of the LED lighting unit of the present embodiment, and FIG. 6 is a light emitted from the LED lighting unit of the present embodiment and miscellaneous light. It is a schematic diagram for demonstrating the relationship with the louver of LED lighting unit.

The LED lighting unit 10 includes an LED substrate 20 on which a wiring pattern is provided and on which a plurality of LED elements 21 are mounted, a control lens 30 on which a convex portion 32 covering a light emitting portion of each LED element 21 is formed, and a control lens. And a louver 40 having a light shielding portion 41 covering the outer peripheral side surface of the 30 convex portions 32. Here, the LED substrates 20 are formed in an elongated rectangular plate shape, and along the longitudinal direction thereof, a plurality of LED elements 21 are arranged in a row at predetermined intervals on a straight line.
The rear surface of the LED substrate 20 is fixed to the bracket 15 (see FIGS. 2 and 3), and the bracket 15 (see FIGS. 2 and 3) is attached to the upper surface 1a of the main body 1 .

  The control lens 30 is configured to convert light emitted from the light emitting portion of the LED element 21 into emitted light L1 (see FIG. 6) having a predetermined angle and to emit the light from the surface portion (peripheral portion) of the convex portion 31. And are provided for each of the LED elements 21.

Specifically, as shown in FIG. 5, the control lens 30 extends outward from the convex portion 32 covering the LED element 21 and the lower end / edge portion of the convex portion 32 beyond the convex portion 32. And a plate-like flange portion 33 provided.
The convex portion 32 has an outer shape (shape on the surface side) of a substantially square frustum shape, and a top portion of the convex portion 32 is formed in a substantially arc convex shape. Further, the outer peripheral surface (the outer peripheral side surface and the outer peripheral upper surface) of the convex portion 32 is an emitting portion (effective emitting surface) 32 a that emits the emission light L1 of a predetermined angle.
In addition, the back surface side of the convex portion 32 is in a concave shape in a substantially hollow dome shape having a void 31, and the LED element 21 is disposed in the void 31. In addition, a substantially hollow and substantially dome-shaped inner circumferential surface of the convex portion 32 is an incident portion (effective incident surface) 32 b to which light from the light emitting portion of the LED element 21 is incident.
The control lens 30 is made of, for example, a translucent synthetic resin or glass.

  In the control lens 30 described above, the LED element 21 is disposed in the void portion 31 of the convex portion 32, and then the flange portion 33 is mounted and fixed on the LED substrate 20, whereby the control lens 30 is placed on the LED substrate 20. The control lens 30 is attached to the

Then, light from the light emitting portion of the LED element 21 is incident on the incident portion (effective incident surface) 32 b on the back surface side of the convex portion 32 as shown in FIG. = Α °) The emitted light L1 is converted into the emitted light L1, and the emitted light L1 is emitted from the emitting portion (effective emitting surface) 32a of the surface of the convex portion 32.
Further, due to its structure, the LED illumination unit 10 is incident on the incident portion (effective incident surface) 32 b of the control lens 30, converted by the control lens 30, and emitted light L 1 emitted from the emission portion (effective emission surface) 32 a Besides the (emission light L1 controlled by the control lens 30), a small amount of miscellaneous light L2 is emitted.
In addition, with the miscellaneous light L2 described in the present embodiment, “scattered light in the inside of the LED element 21 and in the control lens 30” and “passing other than the effective surface (effective incident surface, effective exit surface) of the control lens 30” It refers to light such as "the light to be emitted", "the light reflected on the light emitting surface of the LED element 21 and both surfaces of the control lens (which is emitted after multiple reflection)".

  In addition, as shown in FIGS. 2 to 4, the louver 40 has a configuration in which a plurality of light shielding portions 41 are arranged side by side along the longitudinal direction of the LED substrate 20 (a grid of one row in plan view , And each light shielding portion 41 covers the outer peripheral side surface of the convex portion 32 of the corresponding control lens 30.

  In addition, as shown in FIG. 5, the light shielding portion 41 of the louver 40 is formed in a substantially square cylindrical shape, and an opening 42 having a square shape in plan view is formed at one end portion. A bottom wall 43 in which a hole 43a into which the convex portion 32 of the control lens 30 is inserted is formed at an end portion. Further, a side wall 44 extending from the bottom wall 43 to the edge of the opening 42 is provided, and the inner side surface 44 a of the side wall 44 surrounds and covers the outer peripheral side surface of the convex portion 32 of the control lens 30. The inner side surface 44 a covers the outer peripheral side surface of the convex portion 32 in a state of being separated from the outer peripheral side surface of the convex portion 32 of the control lens 30.

Further, the inner side surface 44a of the side wall 44 is formed by four side surface portions, and each side surface portion faces the corresponding outer peripheral side surface of the substantially square frustum-shaped control lens 30 (convex portion 32). It is arranged. In addition, the inner side surface 44 surrounding the outer peripheral side surface of the control lens 30 is formed in a parabolic shape. Then, the miscellaneous light from the control lens 30 is reflected by the inner side surface 44 a of the side wall 44 and emitted from the opening 42.
The louver 40 is formed of, for example, a synthetic resin.

  Next, the “relationship between the emission light emitted from the control lens 30 and the shape of the louver 40” and the “relationship between the miscellaneous light and the inner side surface 44a of the louver 40” of the LED lighting unit 10 according to this embodiment This will be described using FIG.

  As illustrated, in the LED lighting unit 10 according to this embodiment, the outer edge of the emission light L1 emitted from the control lens 30 is the inner edge (hereinafter referred to as the inner edge of the side wall 44 on the one end side (opening 42 side) of the louver 40). For the sake of convenience, the shape and size of the side wall 44 of the louver 40 are formed so as to be in contact with the "inner angle" 44a1. The control lens 30 is also designed such that the outer edge of the emission light L1 is in contact with the inner angle 44a1 of the side wall 44 on one end side (the opening 42 side) of the louver 40.

Further, in the present embodiment, the control lens 30 is set so that the angle with respect to the horizontal direction of the “glare cut-off line gc” which is a line connecting the outer shape of the control lens 30 and the inner angle 44a1 of the louver 40 becomes the desired angle θ2. And the shape and size of the side wall 44 of the louver 40 are set. In the illustrated example, the case where the desired angle θ2 is “35 °” is illustrated.
Further, in the present embodiment, “θ2 = 35 °” is based on the following reasons.
Specifically, the angle at which a human looks up is usually said to be "30 °", and if "θ2" is larger than "30 °", glare can be suppressed. However, when the value of “θ2” is made too large, the glare is suppressed but the amount of light effective to illuminate the object is limited, and the irradiation range is also narrowed.
Therefore, the inventor of the present application has conducted research and tests on the above-mentioned angle (θ2) that can provide the necessary brightness in the work environment immediately below while suppressing glare. As a result, it came to the conclusion that making "θ2 = 35 °" was optimum for the user, and adopted a design such that "θ2 = 35 °". Thus, according to the present embodiment, two contradictory problems of glare and light extraction efficiency can be simultaneously solved by unique optical control by the control lens 30 and the louver 40.
The above θ2 is optimally “35 °”, but substantially the same effect can be obtained even if θ2 is an angle in a range close to “35 °” (for example, 30 <θ2 <35). (In the case of 30 <θ2 <35, the effect of suppressing the glare decreases somewhat).

Then, according to the illustrated example, in the range of “θ2 = 35 °” that the user looked up, the user is interrupted by the louver 40 and can not see the light source (in this case, the control lens 30 emitting light). I can not feel it.
Further, in the illustrated example, most of the light of the emission light L1 of the predetermined angle α emitted from the control lens 30 of the LED lighting unit 10 is illuminated from the opening 42 of the louver 40 without being blocked by the louver 40 The target area is irradiated. That is, in order to prevent the user from feeling dazzled, the LED lighting unit 10 according to the present embodiment is provided with the louver 40 covering the outer peripheral side surface of the control lens 30, and the light emitting portion of the LED element 21 emits light. The light to be illuminated can be effectively irradiated to the illumination target area, and the light which is wasted can be minimized.

Further, it is preferable that the louver 40 of the present embodiment is formed in black. According to this configuration, the louver 40 itself absorbs light (for example, the louver emits light like a white louver) Even if the user looks at the louver 40, he does not feel dazzling.

  In addition, the side wall 44 of the louver 40 is a highly reflective / low diffusive surface that at least the inner side surface 44a (a surface opposite to the outer circumferential side surface of the convex portion 32 of the control lens 30) highly reflects and diffuses light. It is desirable that (for example, a black mirror surface) be used. With this configuration, the miscellaneous light L2 from the control lens 40 can be efficiently reflected by the high reflection / low diffusion surface 44a, and can be emitted from the opening 42, so that the miscellaneous light can be used effectively.

Furthermore, in the present embodiment, the inner side surface 44a of the side wall 44 of the louver 40 sets the miscellaneous light L2 from the control lens 30 within the range of the angle θ3 formed by the two left and right glare cut off lines gc in side view. It is formed to reflect so as to fit. That is, the inner side surface 44a reflects the miscellaneous light L2 so as to fall within the range between the two glare cut-off lines gc. In the example illustrated, the angle θ3 formed by the left and right glare cut-off lines gc (two glare cut-off lines gc) is “110 °”, and the miscellaneous light L2 from the control lens 30 is the side wall of the louver 40 It is reflected by the inner side surface 44a of 44, and the reflected light falls within the range (range of 110 °) of the left and right glare cut-off lines gc.
According to this configuration, the slight amount of miscellaneous light L2 is also difficult to directly enter the user's vision, so the possibility of the user feeling dazzling is reduced.

Further, in the present embodiment, the outer shape (shape on the surface side) of the convex portion 32 of the control lens 30 is formed in a substantially quadrangular frustum shape, and the emission light L1 emitted from the control lens 30 is a louver. The light is emitted from the opening 42 having a square shape in a plan view in contact with the inner corner 44a1 of the side wall 44 on one end side (the opening 42 side) of the light shielding portion 41 of FIG.
According to this configuration, light having a square cross section is emitted from the opening 42 of the light shielding portion 41 of the louver 40.

Further, in the LED control unit 10 of the present embodiment, a plurality of LED elements 21 are arranged in a row at predetermined intervals on a straight line, and a control lens 30 is provided on each LED element 21. The side surfaces are covered by the corresponding light shields 41 of the louver 40.
With this configuration, light having a rectangular cross section emitted from the opening 42 of each light shielding portion 41 of the louver 40 is arranged in a straight line and irradiated as an elongated light having a rectangular cross section.

  The present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the invention.

Although the LED lighting unit 10 is configured to include the plurality of LED elements 21 in the embodiment described above, this is merely an example.
For example, the LED lighting unit includes an LED substrate (not shown) on which one LED element 21 is mounted, a control lens 30 having a convex portion 32 covering a light emitting portion of the LED substrate, and a control lens 30. A louver (not shown) having a light shielding portion 41 covering the outer peripheral side surface of the convex portion 32 may be provided. Also in this case, as in the present embodiment, it is possible to provide an LED lighting unit having a structure with reduced glare. In this case, for example, the LED lighting unit can be mounted and used in a small downlight or the like.

  Moreover, in the embodiment mentioned above, although the example in which the LED lighting unit 10 was mounted in the line-type base lighting fixture W was shown, it is possible to mount and use the LED lighting unit 10 in various lighting fixtures. . For example, the LED lighting unit 10 can be used as a light source of a desk stand.

Moreover, although the base lighting fixture W of embodiment mentioned above was a type directly attached to the wiring duct D, this is only an illustration to the last. For example, the main body 1 of the LED lighting unit 10 according to the present embodiment is provided with a rod-like arm extending perpendicularly from the upper surface 1a of the main body 1, and the plug 3 connected to the wiring duct D is provided at the tip of the arm. The configuration may be adopted. In this case, the line type base light fixture W is attached to the wiring duct D via the arm part (attached to the wiring duct D in a suspended state).
Moreover, the line type base lighting fixture W may not be attached to the wiring duct D, but may be of a type directly installed on the ceiling.

  Further, the shape of the control lens 30 shown in the above-described embodiment is merely an example. The control lens 30 may be configured to convert light emitted from the light emitting portion of the LED element 21 into emission light L1 of a predetermined angle and to emit the light.

L1 ... Emitted light L2 ... Miscellaneous light gc ... Glare cut line

D ... Wiring duct

DESCRIPTION OF SYMBOLS W ... Line-type base lighting fixture 1 ... Body part 1a ... Upper surface part 1b ... Side surface part 1c ... Concave part 3 ... Plug 10 ... LED lighting unit 15 ... Bracket 20 ... LED board 21 ... LED element 30 ... Control lens 31 ... Void part 32 ... convex portion 32a ... emitting portion (effective emitting surface)
32b ... entrance (effective entrance surface)
33: Flange 40: Louver 41: Light shielding portion 42: Opening 44: Side wall 44a: Inner side surface 44a1: Inner edge (inner angle) of side wall

Claims (6)

A substrate on which an LED element is mounted,
A control lens in which a convex portion covering the light emitting portion of the LED element is formed;
And a louver having a light shielding portion covering an outer peripheral side surface of the convex portion of the control lens,
The light shielding portion of the louver has an opening at one end, and a bottom wall having a hole into which the convex portion of the control lens is inserted at the other end opposite to the opening. And a side wall extending from the bottom wall to the edge of the opening at the one end, the inner side surface of the side wall covering and covering the outer peripheral side surface of the convex portion of the control lens;
In the control lens, the convex portion is inserted into the hole of the bottom wall of the louver, and the light from the light emitting portion of the LED element is converted into an emitted light of a predetermined angle and emitted from the convex portion Is supposed to
The louver is formed so that the outer edge of the emission light of the predetermined angle emitted from the control lens may be in contact with the inner edge of the side wall of one end of the louver. The inner side surface of the side wall of the louver is a high reflection and low diffusion surface that reflects light with high reflection and low diffusion,
Miscellaneous light is emitted from the control lens in addition to the emitted light of the predetermined angle, and the miscellaneous light is reflected by the inner side surface and emitted from the opening. The LED lighting unit according to claim 1, characterized in that:   The inner side surface of the side wall of the louver is formed to reflect the miscellaneous light so as to fall within the range between the left and right two glare cut-off lines in the side view. The LED lighting unit according to Item 2.   The LED lighting unit according to any one of claims 1 to 3, wherein the louver is formed in black. In the convex portion of the control lens, the shape of the outer peripheral portion is a substantially truncated pyramid shape, and the top surface thereof is formed in a substantially arc convex shape,
5. The light shielding portion of the louver according to any one of claims 1 to 4, wherein the opening is formed in a polygonal shape in plan view, and the inner side surface is formed in a parabolic shape. LED lighting unit. A line type base luminaire comprising the LED lighting unit according to any one of claims 1 to 5, comprising:
The substrate is formed in an elongated plate shape, and a plurality of the LED elements are arranged at predetermined intervals in a straight line along the longitudinal direction of the substrate.
The control lens is provided for each of the LED elements,
The light shielding portion of the louver is provided for each of the control lenses,
Furthermore, the main body unit which holds and accommodates the said LED lighting unit is characterized by the above-mentioned.

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