JP5885807B2 - LED lighting fixtures - Google Patents

Description

  The present invention relates to a luminaire using an LED as a light source. For example, the present invention relates to an LED lighting apparatus that can adjust the distance between an LED and a lens with a simple configuration.

  In the prior art, in order to control the light distribution of a luminaire using an LED as a light source, a lens body in which lenses having different light distributions are alternately arranged and a lens corresponding to the LED are switched by sliding with respect to the light source. Discloses a technique for changing the light distribution (see Patent Document 1). Moreover, in order to control the light distribution of the lighting fixture which used LED as a light source, the mechanism which changes light distribution by moving a lens to the orthogonal | vertical direction is disclosed (refer patent document 2).

JP 2004-199891 A JP 2008-218084 A JP 2009-48014 A

  In the conventional lighting fixture, when controlling the light distribution, there is a problem that a lens corresponding to each desired light distribution must be prepared and the lens must be replaced. In addition, Patent Documents 1 and 2 have problems that the structure is complicated, the number of parts increases, the cost increases, the mechanism portion becomes large, and the device itself becomes large.

  It is an object of the present invention to provide a lighting fixture that can adjust the light distribution of illumination without preparing a large number of different types of lenses and that has a simple structure.

The LED lighting apparatus of the present invention is
The body,
At least one LED is mounted on one surface to be a mounting surface, and an LED mounting substrate attached to the main body,
A lens forming part which is a plate-like plate-like body in which a lens corresponding to each LED of the at least one LED is formed;
A plurality of storage units that can store the lens forming unit, and in each of the storage units, the lens forming unit faces the mounting surface of the LED mounting substrate, and the lens faces the corresponding LED. Thus, a lens unit holder having a plurality of storage units capable of storing the lens forming unit is provided.

  According to the present invention, it is possible to adjust the light distribution of illumination without preparing a large number of different types of lenses, and it is possible to provide a luminaire having a simple structure.

1 is a perspective view showing an LED lighting apparatus 11 according to Embodiment 1. FIG. It is AA sectional drawing (lamp 12) of FIG. FIG. 3 is an exploded perspective view of the light emitting unit 1 according to the first embodiment. The front view (X direction arrow view) and sectional drawing which show the light emission part 1 of Embodiment 1. FIG. Sectional drawing (lens arrangement | positioning figure) in case the number of spacers of Embodiment 1 is two. Sectional drawing (lens arrangement | positioning figure) in case the number of spacers in Embodiment 1 from which thickness differs is two. Sectional drawing (lens arrangement | positioning figure) in case the number of spacers of Embodiment 1 is one. The perspective view which shows an LED light source part and a lens when two LED of Embodiment 1 is mounted. The perspective view which shows a LED light source part and a lens when 1 LED of Embodiment 1 is mounted. The front view and CC sectional drawing which show the light emission part 1 of the lamp 12 of Embodiment 2. FIG. FIG. 6 is an exploded perspective view showing a light emitting unit 1 of a lamp 12 according to a second embodiment. The perspective view which shows the lens formation part 5 of Embodiment 2, and the C-shaped lens storage cassette. The perspective view which shows the state which pinched | interposed the lens formation part 5 of Embodiment 2 with two C-shaped lens storage cassettes.

Embodiment 1 FIG.
FIG. 1 is a perspective view showing a lighting fixture (spotlight), and FIG. 2 is a cross-sectional view taken along line AA of FIG.

  As shown in FIG. 1, the LED lighting apparatus 11 includes a power supply unit 8 whose upper part is attached to a duct rail (lighting rail), and an arm 9 that extends from the power supply unit 8 and through which a harness drawn from the power supply unit 8 is passed. And a lamp 12 which is physically connected to the power supply unit 8 by an arm 9 and which can move the main body vertically and horizontally.

  The lamp 12 radiates heat generated when the LED light source unit 3 having the LED light source unit 3 connected to the harness and turned on by the power supplied from the power supply unit 8 and the LED light source unit 3 of the light emitting unit 1 is turned on to the outside. It is comprised from the thermal radiation part 10 to do.

  As shown in FIG. 2, in the light emitting unit 1 of the LED lighting apparatus 11, an LED light source unit 3, a spacer 4, a lens forming unit 5, and a fixing spring 6 are housed inside a main body 2.

Hereinafter, the light emission part 1 of the lamp 12 which comprises the LED lighting fixture 11 is demonstrated based on a figure.
FIG. 3 is an exploded perspective view of the light emitting unit 1 of the lamp.
FIG. 4 is a front view and a cross-sectional view of the light emitting unit 1 of the lamp. FIG. 4A is an arrow view in the X direction of FIG. FIG. 4B is a cross-sectional view taken along the line BB in FIG.

  As shown in FIG. 2, the light emitting unit 1 includes a cylindrical main body 2, an LED light source unit 3 attached to the bottom surface of the main body 2, a spacer 4a for adjusting a lens focal length, and a spacer 4 composed of a spacer 4b. The lens forming portion 5 can adjust the “focal length” by the spacer 4, and the fixing spring 6 that fixes the lens forming portion 5 and the spacer 4 to the main body 2.

(Focal length)
Here, the “focal length” is, in other words, the distance between the LED 3 a (light emitting diode) and the lens forming portion 5. The “focal length” will be specifically described with reference to FIGS. The LED light source unit 3 (LED mounting board) is mounted on the main body 2 with at least one LED 3a mounted on one surface serving as the mounting surface 3b-1. The lens forming portion 5 is a plate-like plate-like body on which a plurality of lenses 5-1 (four in the example of FIGS. 1 to 4) corresponding to each LED 3a are formed. The lens forming portion 5 is disposed on the main body 2 so as to face the mounting surface 3b-1 of the LED light source portion 3 (LED mounting substrate) so that each lens 5-1 faces the corresponding LED 3a. As shown in FIG. 2, the spacers 4a and 4b are arranged on the side of the mounting surface 3b-1 of the LED light source unit 3 along with the lens forming unit 5 in the normal direction of the mounting surface 3b-1 (the Y direction in FIG. (Referred to as line Y direction). The spacers 4a and 4b have substantially uniform thicknesses ta and tb in the normal Y direction in the stacked arrangement state, and the spacers 4a and 4b have a thickness of the lens forming portion 5 arranged to face the mounting surface 3b-1. By ta and tb, as shown in FIGS. 5 and 6 to be described later, positioning is performed in the normal Y direction according to the stacking order of the lens forming portions 5. In the configuration of the LED lighting apparatus 11 as described above, the distance between the LED 3a and the lens 5-1 is “focal length”. In addition, since the lens 5-1 is formed on the lens forming portion 5 and the LED 3a is fixedly mounted on the substrate 3b, the “focal length” means the substrate 3b on which the LED 3a is mounted and the substrate 3b. This is the distance in the normal line Y direction to the lens forming portion 5 that is arranged to face.

  The main body 2 is formed of a material having high thermal conductivity such as aluminum die casting in order to dissipate heat generated from the LED light source unit 3. In order to prevent the lens forming portion 5 from rotating, slits 2 a are provided symmetrically at positions along the center line of the inner side surface of the main body 2. The slit 2a prevents the rotation of the lens forming portion 5 by restricting the rotation of the protrusion 5a-1 provided in the lens forming portion 5 in the circumferential direction.

  The LED light source unit 3 includes an LED 3a and a substrate 3b on which the LED 3a is mounted. The LED light source unit 3 is installed on the bottom surface (heat radiation unit side) of the main body 2.

  The two spacers 4a and 4b constituting the spacer 4 are annular and have the same thickness (ta = tb). That is, the spacer 4a and the spacer 4b have the same shape.

  The lens forming portion 5 is formed of a transparent resin such as acrylic or polycarbonate. The same number of lenses 5-1 (focal points) are formed at positions corresponding to the respective LEDs 3a mounted on the substrate 3b of the LED light source unit 3. The lens forming portion 5 is provided with a protruding portion 5a-1 along the slit 2a provided in the main body 2 so that the lens 5-1 (focal point) corresponding to the corresponding LED 3a does not shift. By fixing and holding the lens forming portion 5 on the main body 2 by the protrusion 5 a-1, the position of the lens 5-1 (focal point) can be prevented from shifting in the circumferential direction inside the main body 2.

  Moreover, it can prevent inserting the front and back of a lens reversely by making the position of slit 2a and protrusion part 5a-1 asymmetric. For example, as shown in FIG. 3, the protrusions 5a-1 are not symmetrically provided at the positions of 0 degrees and 180 degrees in the circumferential direction, but the protrusions at the position of 0 degrees in the circumferential direction. You may provide 5a-1 and the projection part 5a-2 of the position of 120 degree | times. In this case, the projections 5a-1 and 5a-2 do not enter the slit 2a when the lens forming part 5 is inserted in the reverse direction, so that it is possible to prevent the lens forming part 5 from being reversely attached. . Further, the user may be alerted by displaying the front and back of the lens forming unit 5 in a place where the adjustment of the focal length such as the end of the lens forming unit 5 is not affected. Alternatively, the front and back of the lens forming unit 5 may be installed in reverse by utilizing the fact that the focal length is different between the front and back of the lens forming unit 5. By doing so, the light distribution pattern can be increased. Thus, when the front and back of the lens are installed in reverse, the narrow angle of the lens can be changed to a wide angle.

  The fixing spring 6 is formed by bending a single metal such as stainless steel into a circular shape and bending both ends inward with a certain interval. The fixing spring 6 is made of spring steel such as stainless steel, and is fitted in a circular groove 2b provided in the main body 2 to fix the lens forming portion 5 and the spacer 4.

Next, the positional relationship (the above-described focal length) between the spacer 4 and the lens forming unit 5 will be described.
FIGS. 5A, 5B, and 5C are cross-sectional views (lens arrangement diagrams) illustrating a state in which the position of the lens forming unit 5 is adjusted when two spacers are provided.

By changing the mounting order of the lens forming portion 5 and the spacer 4, the focal length can be changed like the distance a, the distance b, and the distance c. By changing the focal length, the light emitted from the LED light source unit 3 can be changed to a desired light distribution. In FIG. 5, when the thicknesses ta and tb of the spacer 4a and the spacer 4b are the same length, d,
For the distance a in (a)
In (b), distance b = distance a + distance d,
In (c), distance c = distance a + 2 × distance d
It becomes. As described above, the focal length of the three patterns can be realized by changing the mounting order of the lens forming portion 5 and the spacer 4.

  The emitted light from the LED light source unit 3 has a wide light distribution characteristic regardless of whether the distance to the focal point of the lens forming unit 5 is short or long. Therefore, the focused light is narrow when the lens forming unit 5 is close. It should be designed to be corners. In that case, when the lens forming portion 5 is closest to the LED 3a, the lens is in focus and has a narrow angle. In general, spotlights often have a light distribution characteristic (1/2 beam angle) in the range of 10 to 40 degrees. Therefore, for example, when the distance between the LED 3a and the lens forming portion 5 is the distance a, the 1/2 beam angle is set to 10 degrees, and then the light distribution characteristic becomes the widest angle, for example, the 1/2 beam angle is 40 The thickness (distance b + distance c) of the spacer 4 is determined so that the angle becomes. Thereafter, the thickness (distance b) of the spacer 4a when the light distribution characteristic becomes a medium angle, for example, when the 1/2 beam angle is 20 °, is determined.

  FIG. 6 is a cross-sectional view (lens arrangement diagram) showing a state in which the lens position is adjusted when there are two spacers having different thicknesses. When the thicknesses of the spacer 4a and the spacer 4b are the same as described in FIG. 5, the spacer 4a and the spacer 4b may be the same or different. When the spacers 4a and 4b have different thicknesses, the pattern for changing the focal length is increased by changing the order of the spacers 4a and 4b. For this reason, a desired light distribution pattern can be increased.

  Further, the number (number of divisions) of the spacers 4 is not limited to two, and may be one or plural. By using three or more spacers and further changing the thickness of the spacers, the desired light distribution pattern can be greatly increased with a small number of spacers.

  In the description of the spacer 4, as described above, when the thickness of the spacer 4a and the spacer 4b is changed, for example, the thickness of the spacer 4a and the spacer 4b is set to the distance d and the distance e (the length is assumed to be a distance d> Let distance e). In this case, in FIGS. 5 (a) and 5 (c), the focal lengths are the same even if the order of the spacers 4a and 4b is changed (the distances a and c are not changed). However, regarding (b), the distance b differs when the arrangement of the spacers 4a and 4b is changed. That is, in (b), the distance b is different between the case where the spacer 4b, the lens forming portion 5 and the spacer 4a are stacked from the left side and the case where the spacer 4a, the lens forming portion 5 and the spacer 4b are stacked. Therefore, the focal length pattern is increased by one compared to the case where the spacers 4a and 4b have the same thickness.

  At this time, for example, when the distance between the LED 3a and the lens forming unit 5 is the distance a, the 1/2 beam angle is set to 10 degrees, and accordingly, the distance between the LED 3a and the lens forming unit 5 is the distance b2. The thickness of the spacer 4a and the spacer 4b is determined so that the 1/2 beam angle is 20 degrees, the 1/2 beam angle is 30 degrees at the distance b1, and the 1/2 beam angle is 40 degrees at the distance c. . Thus, by adding the thickness of the spacer to the design parameters, the design range of the light distribution characteristics can be expanded.

  In the first embodiment, the case where the main body has a cylindrical shape has been described. However, the main body may have a quadrangular prism shape or the like.

Next, another light emitting unit 1 of the present embodiment will be described.
FIG. 7 is a cross-sectional view (lens arrangement diagram) showing another lamp 12 of the first embodiment. The light emitting unit 1 includes a single spacer, and the lens position is adjusted by the single spacer.

  The case where the spacer 4 is composed of the two spacers 4a and 4b has already been described. However, when the focal length can be adjusted by two patterns, it is not necessary to divide the spacer 4 into two. Also good.

  As shown in FIG. 7, two types of light distribution can be easily obtained by using one spacer 4 and changing the order with the lens forming portion 5. If the user needs only two types of light distribution patterns, it is possible to reduce the number of necessary parts constituting the light-emitting unit 1, so it is also effective to use only one spacer 4. is there.

  As another example of the first embodiment, an example in which the LED light source unit 3 of the light emitting unit 1 has two LEDs 3a mounted on the substrate 3b will be described with reference to FIG. FIG. 8 is a perspective view showing a part of another light emitting unit 1 of the present embodiment. FIG. 8 shows a state where two LEDs 3a are mounted on the substrate 3b. The LED light source unit 3 and the lens forming unit 5 are different from the configuration shown in FIG.

  As another embodiment of the first embodiment, an example in which the LED light source unit 3 of the light emitting unit 1 has one LED 3a mounted on the substrate 3b will be described. FIG. 9 is a perspective view showing a part of another light emitting unit 1 of the first embodiment. FIG. 9 shows a state in which one LED 3a is mounted on the substrate 3b. The LED light source unit 3 and the lens forming unit 5 are different from the configuration shown in FIG.

  In the first embodiment, the LED light source unit 3 is configured by mounting four LEDs 3a on the substrate 3b. As shown in the example of another embodiment of the present embodiment, the LED 3a The position and quantity for mounting are not limited to this, and it is sufficient that the number of LEDs 3a is one or more. Moreover, you may mount LED3a on the board | substrate 3b how. Regardless of how the position and quantity of the LED 3a mounted on the substrate 3b are changed, it corresponds to any LED light source part 3 depending on the shape of the lens forming part 5 and the thickness of the spacer 4 corresponding to the position and quantity to be mounted. can do.

  In the first embodiment, the spacer 4 is assembled by determining the stacking order of each spacer and the lens forming portion 5 before assembling. Alternatively, when in use, in order to obtain another light distribution characteristic, the assembled state is disassembled, and the stacking order of the spacers and the lens forming unit 5 is determined and assembled again. In this way, the LED lighting apparatus 11 is disassembled from the assembled state, and when assembled again, the stacking order in the normal Y direction of each spacer (or one) and the lens forming unit 5 can be changed. It is.

Embodiment 2. FIG.
In the second embodiment, a lens housing cassette 7 is used instead of the spacer 4 shown in the first embodiment. Hereinafter, only different points from Embodiment 1 will be described.

FIG. 10 is a front view and a cross-sectional view showing a lamp part of a lighting fixture.
FIG. 10B is a cross-sectional view taken along the line CC of FIG.
FIG. 11 is an exploded perspective view showing the lamp part of the lighting apparatus of FIG.
FIG. 12 is a perspective view showing a lens and a C-shaped lens storage cassette.
FIG. 13 is a perspective view showing a state in which the lens of the lighting apparatus of FIG. 10 is sandwiched between two C-shaped lens storage cassettes.

  The lens storage cassette 7 (lens unit holder) is provided with a plurality of slits (storage units) that can store lenses. The lens housing cassette 7 can obtain a desired light distribution by inserting the lens forming portion 5 into any of the slits. For example, when the lens forming unit 5 is changed from the slit 7-3 to the other slit 7-1 and stored, the lens forming unit 5 changes from the storage position of the lens forming unit 5 before the storage position of the lens forming unit 5 after the change is changed. Slide 5 in the thickness direction. That is, when the lens forming unit 5 is changed from the slit 7-3 to the slit 7-1, the storage state of the slit 7-1 is the lens formation in the storage state of the slit 7-3 with respect to the storage state of the slit 7-3. It is the state which slid in the plate | board thickness direction of the part 5. FIG. In the lens storage cassette 7, the lens forming portion 5 stored is opposed to the mounting surface 3 b-1 and the lens 5-1 is opposed to the corresponding LED 3 a in a state where the lens forming portion is stored in a predetermined slit. The main body 2 is arranged.

  Moreover, by changing the width of the slit and placing the front and back in reverse, the number of patterns for changing the focal length can be increased, and the number of light distribution patterns that can be set can be increased. By using this lens storage cassette 7, the spacer 4 constituted by the two parts of the spacer 4a and the spacer 4b in the first embodiment is combined into one part as a unit. For this reason, it is possible to prevent missing parts and the like, and workability at the time of attaching and removing the lamp 12 is improved.

  Further, the lens storage cassette 7 is not limited to a cylindrical shape as shown in FIG. 11, but may be a C-shaped unit in which the upper part of the cylinder as shown in FIG. 12 is cut. Further, two semicircular units that can be fixed so as to sandwich the lens forming portion 5 as shown in FIG. 13 may be used in combination. Also in these cases, by changing the width of the slit and placing the front and back in reverse, the number of patterns for changing the focal length can be increased, and the number of light distribution patterns that can be set can be increased.

In the above embodiment, an example of the following LED lighting fixtures was described.
The body,
At least one LED is mounted on one surface to be a mounting surface, and an LED mounting substrate attached to the main body,
A plate-like plate-like body in which lenses corresponding to the LEDs of the at least one LED are formed, facing the mounting surface of the LED mounting substrate so that the lenses face the corresponding LEDs. A lens forming portion that is a plate-like body disposed in the main body;
On the side of the mounting surface of the LED mounting substrate, the lens forming portion is laminated in the normal direction of the mounting surface and arranged in the main body, and the laminated arrangement state has a substantially uniform thickness in the normal direction. And at least one of positioning the lens forming portion disposed to face the mounting surface in the normal direction according to the stacking order of the lens forming portions according to the thickness in the normal direction. An LED lighting apparatus comprising a spacer.

In the above embodiment, an example of the following LED lighting fixtures was described.
The LED lighting fixture is:
An LED lighting apparatus, wherein the stacking order of the at least one spacer and the lens forming portion in the normal direction can be changed when disassembled from the assembled state and assembled again.

In the above embodiment, an example of the following LED lighting fixtures was described.
The LED lighting fixture is:
An LED lighting apparatus comprising: at least two spacers having different thicknesses in the normal direction when arranged on the main body.

In the above embodiment, an example of the following LED lighting fixtures was described.
The body,
At least one LED is mounted on one surface to be a mounting surface, and an LED mounting substrate attached to the main body,
A lens forming part which is a plate-like plate-like body in which a lens corresponding to each LED of the at least one LED is formed;
A plurality of storage units that can store the lens forming unit, wherein the lens forming unit is changed from one of the storage units to any of the other storage units, and the lens forming unit is changed. A plurality of storage portions that slide in the plate thickness direction of the lens forming portion, which is the plate-like body, from the storage position of the lens forming portion before the storage position of the lens is changed, A lens unit holder disposed in the main body so that the lens forming unit stored in the storage unit is opposed to the mounting surface of the LED mounting substrate and the lens is opposed to the corresponding LED. An LED lighting apparatus comprising:

  DESCRIPTION OF SYMBOLS 1 Light emission part, 2 main body, 2a slit, 2b groove | channel, 3 LED light source part, 3a LED, 3b board | substrate, 3b-1 mounting surface, 4 spacer, 4a spacer, 4b spacer, 5 lens formation part, 5-1 lens, 5a Projection part, 6 fixing spring, 7 lens housing cassette, 8 power supply part, 9 arm, 10 heat radiation part, 11 LED lighting apparatus, 12 lamp.

Claims (7)

The body,
At least one LED is mounted on one surface to be a mounting surface, and an LED mounting substrate attached to the main body,
A lens forming part which is a plate-like plate-like body in which a lens corresponding to each LED of the at least one LED is formed;
A plurality of storage units that can selectively store the lens forming unit, wherein each of the storage units has the lens forming unit facing the mounting surface of the LED mounting substrate and the LED corresponding to the lens mounting unit. and a lens unit holder having a plurality of accommodating portions capable of accommodating the lens forming section so as to face the,
The lens unit holder is
An LED lighting apparatus in which the lens forming portion is selectively housed in any of the plurality of housing portions .   The lens unit holder is
  2. The LED illumination according to claim 1, wherein the lens forming unit is detachable and can be replaced with another storage unit when the lens forming unit is selectively stored in any of the plurality of storage units in the detached state. Instruments. The body,
At least one LED is mounted on one surface to be a mounting surface, and an LED mounting substrate attached to the main body,
A lens forming part which is a plate-like plate-like body in which a lens corresponding to each LED of the at least one LED is formed;
A plurality of storage units that can store the lens forming unit, and in each of the storage units, the lens forming unit faces the mounting surface of the LED mounting substrate, and the lens faces the corresponding LED. A lens unit holder having a plurality of storage units capable of storing the lens forming unit ,
The lens forming part is
An LED lighting apparatus that can be stored in the storage portion of the lens unit holder by reversing the front and back of the surface facing the mounting surface and the surface not facing the mounting surface. The lens unit holder is
It has a hollow cylindrical shape,
Each storage section of the plurality of storage sections is
The LED lighting apparatus according to claim 3, wherein the hollow cylindrical side surface is formed as each slit of a plurality of slits formed by cutting out into an arc shape. The lens unit holder is
C-shaped,
Each storage section of the plurality of storage sections is
The LED lighting apparatus according to claim 3, wherein the LED lighting apparatus is formed as each groove of a plurality of grooves formed on the inner peripheral side of the C-shape. The body,
At least one LED is mounted on one surface to be a mounting surface, and an LED mounting substrate attached to the main body,
A lens forming part which is a plate-like plate-like body in which a lens corresponding to each LED of the at least one LED is formed;
A plurality of storage units that can store the lens forming unit, and in each of the storage units, the lens forming unit faces the mounting surface of the LED mounting substrate, and the lens faces the corresponding LED. A lens unit holder having a plurality of storage units capable of storing the lens forming unit ,
The lens unit holder is
It has a hollow cylindrical shape,
Each storage section of the plurality of storage sections is
The LED lighting apparatus formed as each slit of a plurality of slits formed by cutting the hollow cylindrical side surface into a circular arc shape. The body,
At least one LED is mounted on one surface to be a mounting surface, and an LED mounting substrate attached to the main body,
A lens forming part which is a plate-like plate-like body in which a lens corresponding to each LED of the at least one LED is formed;
A plurality of storage units that can store the lens forming unit, and in each of the storage units, the lens forming unit faces the mounting surface of the LED mounting substrate, and the lens faces the corresponding LED. A lens unit holder having a plurality of storage units capable of storing the lens forming unit ,
The lens unit holder is
C-shaped,
Each storage section of the plurality of storage sections is
The LED lighting fixture formed as each groove | channel of the some groove | channel formed in the said C-shaped inner peripheral side.

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