JP6677904B2 - LED lighting device - Google Patents

Description

  The present invention relates to an LED lighting device.

  In recent years, lighting devices using LEDs as light sources instead of conventional fluorescent lamps have been developed and distributed. For example, Patent Literature 1 below discloses a so-called pendant type LED lighting device that is used by being suspended from a ceiling.

JP 2014-216209 A

  An object of the present invention is to realize a novel LED lighting device in which the degree of lighting and the shape of the lighting device itself can be changed on the user side according to the usage of the user.

The LED lighting device of the present invention includes:
A lamp including an LED element;
Having a hollow cover that covers the lamp,
The cover part,
On the side surface of the cover, has a groove extending in the circumferential direction to surround the central axis of the cover,
It transmits at least a part of the light emitted from the lamp, and is made of a deformable material when an external force is applied,
It is characterized in that it can be folded back on the basis of a line along the extending direction of the groove.

  According to the above configuration, the user can change the shape of the lighting device according to the user's request by folding the cover along the groove. Since the cover is configured to transmit at least a part of the light emitted from the lamp, by changing the shape of the cover, the direction and the amount of light transmitted through the cover are changed, and the lighting mode is changed. Can be changed. In addition, the divergence angle of the light directly emitted from the lamp without passing through the cover portion can be changed between the case where the cover portion is folded and the case where the cover portion is not folded. That is, according to this configuration, a single lighting device can have a high degree of freedom with respect to the shape of the device itself and the lighting mode.

  The cover portion is made of a material that can be deformed when an external force is applied.For example, in addition to a silicone resin, a rubber material such as natural rubber, synthetic natural rubber, butadiene rubber, chloroprene rubber, urethane rubber, and ethylene propylene rubber is used. Can be used. Here, “deformable” may mean that it can be deformed with a certain degree of elasticity. In other words, when the cover is folded with reference to the line formed by the groove, the cover is fixed in the shape after the folding, but even if it is bent at another place, it naturally returns to the original shape again. It may have the property of performing the following.

  The cover portion may have two opening surfaces facing each other in the central axis direction. In this case, of the illumination light emitted from the lamp, part of the light is irradiated directly on the target object through the opening surface without being incident on the cover part, and another part of the light is irradiated on the side surface of the cover part. The light may be transmitted and irradiated onto the object. In this case, the state of illumination of the target object can be changed depending on the state in which the cover has been folded and the state in which the cover has been folded.

  In a state where the folded back portion of the cover portion is released, the groove portion may be provided only on an outer surface of the side surface of the cover portion.

  If the groove is formed on the inner surface of the cover, if light is emitted from the lamp in a state where the folded back of the cover is released, the edge of the groove will appear as a shadow on the cover. Due to the presence of this shadow, there is a possibility that the lighting mode desired by the user may not be realized. According to the above configuration, since the groove is formed on the outer surface of the cover, no or almost no shadow of the groove appears on the cover during light emission. Thereby, the light emitted from the lamp can be effectively used to illuminate the object.

  The groove may be configured to have an R shape when viewed along the direction in which the groove extends.

  When the groove portion shows a V shape when viewed along the direction, by repeatedly turning the cover portion, a high load is applied in the vicinity of a portion to be a fold line, and there is a possibility that it may be broken due to wear. . By forming the groove having the R shape as described above, the stress generated at the time of folding is dispersed around the groove, and the durability is improved.

  In particular, by providing a groove portion having an R shape on the outer side surface of the cover portion, when the cover portion is turned outward, the cover portion located inside has an R shape, but on the exposed side A flat surface is formed on the located cover part. Thereby, high designability is realized.

The groove is provided on a side surface of the cover at a plurality of locations separated in a central axis direction of the cover,
Each of the grooves may extend in the circumferential direction so as to surround the central axis of the cover in a state of being separated from each other.

  By providing the cover with a plurality of grooves, the cover can be folded in various ways. As a result, the degree of freedom can be increased with respect to the shape of the device itself and the mode of illumination. In addition, since the plurality of grooves are arranged apart from each other, positioning when the cover is folded can be facilitated.

  When the cover portion is folded with reference to a line along the extending direction of the groove portion provided at a position farthest from the lamp with respect to the center axis direction of the cover portion, the side surface exposed to the outside by being folded back All of the grooves may be covered with the groove.

  In particular, when the groove is provided only on the outer surface of the cover, the groove is visually confirmed on the outer surface of the cover in a state where the folding of the cover is released. Under the above configuration, by folding back the cover with reference to the groove provided at the position farthest from the lamp in the center axis direction, it is possible to change the illumination mode while completely hiding the groove.

The cover portion, in a state where the folded back of the cover portion is released,
A first region having a hollow portion whose inner diameter is substantially the same even when displaced in the central axis direction,
The lamp is connected to the first region, and has an inner diameter at a position farthest from the first region with respect to the central axis direction, the second region having a hollow portion larger than the inner diameter of the first region. It may be constituted by an LED module including an LED element, and may be fixedly accommodated in a hollow portion located in the first region of the cover portion.

  According to the above configuration, since the lamp configured by the LED module is fixedly accommodated, the light emitting portion is stabilized. In addition, light emitted from the LED module housed in the hollow portion located in the first region toward the cover that covers the LED module passes through the cover and is emitted to the outside. At this time, the first region of the cover is realized as a soft illumination light source.

The LED lighting device has a first opening surface, a hollow shade portion including a second opening surface having a larger inner diameter than the first opening surface facing the first opening surface,
The cover portion is configured such that, in the second region, the inner diameter of the hollow portion increases with distance from the first region with respect to the central axis direction,
The shade unit includes:
It is made of a material that reflects at least a part of light emitted from the lamp,
The inner diameter of the first opening surface is larger than the outer diameter of the cover portion located in the first region, and smaller than the largest outer diameter of the cover portion located in the second region,
The inner diameter of the second opening surface is configured to be larger than the largest outer diameter of the cover portion located in the second region,
The inner side surface of the shade portion may be in contact with the outer side surface of the cover portion in the second region, and the shade portion and the cover portion may be integrally held.

  According to the above configuration, of the light emitted from the lamp, part of the light is emitted as illumination light without being incident on the cover and the shade, and another part of the light is transmitted through the cover. The light is emitted as illumination light, and another part of the light is transmitted through the cover part, reflected by the shade part, and emitted as illumination light. That is, some light can be used as indirect illumination. And, as described above, the cover portion has a configuration that can be folded back at the location of the groove portion. Therefore, according to this configuration, by further providing the shade portion, it is possible to provide a higher degree of freedom with respect to the shape of the device itself and the lighting mode, in combination with the presence / absence of the folding of the cover portion and the folding position.

  An opposing separation distance between the first opening surface and the second opening surface of the shade portion may be shorter than a distance between both ends in the central axis direction of the cover portion. At this time, when the cover portion is inserted relatively in the direction from the second opening surface of the shade portion toward the first opening surface, when viewed from the outside, a part of the cover portion is smaller than the shade portion in the axial direction of the cover portion. Stabilizes in a protruding manner. This makes it easier for the light transmitted through the cover portion to spread in the horizontal direction, thereby realizing different light distribution. In addition, since the cover is located at a position protruding from the shade, the cover can be touched without performing the work of removing the shade when performing deformation, so that the cover can be easily folded back. Can be.

  In a state where the folded back portion of the cover portion is released, when the cover portion is inserted relatively in a direction from the second opening surface of the shade portion toward the first opening surface, the inner surface of the shade portion is In a state where the outer surface of the cover portion is in stable contact with the outer surface in the second area, all the grooves provided in the cover portion may be covered by the outer surface of the shade portion.

  According to the above configuration, since all the grooves provided outside the cover are covered by the shade, the design is improved.

  ADVANTAGE OF THE INVENTION According to this invention, the LED illumination device which can change the degree of illumination and the shape of an illumination device itself on a user side is implement | achieved.

It is a typical perspective view of the LED lighting device of a first embodiment. It is a schematic plan view of the LED lighting device of the first embodiment. It is a schematic front view of the LED lighting device of the first embodiment. It is a schematic front view of the LED lighting device of the first embodiment. It is a partially enlarged view of the LED lighting device of the first embodiment. It is an example of the typical front view when the cover part of the LED lighting device of the first embodiment is folded back. It is an example of the typical front view when the cover part of the LED lighting device of the first embodiment is folded back. It is an example of the typical front view when the cover part of the LED lighting device of the first embodiment is folded back. It is an example of the typical front view when the cover part of the LED lighting device of the first embodiment is folded back. FIG. 3B is a drawing comparing the embodiment of the LED lighting device shown in FIG. 1C with the embodiment of the LED lighting device shown in FIG. 3B. It is a schematic diagram for explaining the difference in the way of light when the groove is provided inside and outside the cover. It is a typical perspective view of the LED lighting device of a second embodiment. It is a typical front view of the LED lighting device of a second embodiment. It is an example of the typical front view when the cover part of the LED lighting device of the second embodiment is folded back. It is another typical perspective view of the LED lighting device of 2nd embodiment. It is another typical front view of the LED lighting device of a second embodiment. It is another example of the schematic front view when the cover part of the LED lighting device of the second embodiment is turned back.

  The configuration of the LED lighting device of the present invention will be described with reference to the drawings as appropriate. In the following drawings, the dimensional ratios in the drawings do not always match the actual dimensional ratios.

[First embodiment]
The configuration of the first embodiment of the LED lighting device will be described.

  1A to 1D are schematic external views of the LED lighting device 1 of the first embodiment. 1A corresponds to a perspective view of the LED lighting device 1, and FIG. 1B corresponds to a plan view of the LED lighting device 1 when viewed from the bottom. FIG. 1C corresponds to a schematic front view of the LED lighting device 1. FIG. 1D is a drawing showing, in addition to the front view shown in FIG. 1C, a part of hidden elements by broken lines.

  The LED lighting device 1 includes a lamp 10 and a hollow cover 20 arranged to cover the lamp 10. As schematically shown in FIG. 1D, the lamp 10 is disposed inside the cover 20. In the present embodiment, the lamp 10 is configured by an LED module including an LED element.

  The cover portion 20 is made of a material that can transmit at least a part of light emitted from the lamp 10. Further, the cover portion 20 is made of a material having an elastic force that can be deformed when an external force is applied. As an example, the cover 20 is made of a rubber material such as natural rubber, synthetic natural rubber, butadiene rubber, chloroprene rubber, urethane rubber, and ethylene propylene rubber, in addition to the silicone resin.

  As shown in FIGS. 1A to 1D, the cover 20 has a groove 21 extending in the circumferential direction 23 so as to surround the central axis 22 of the cover 20. In the present embodiment, a case where the cover 20 has a plurality of grooves (21a, 21b, 21c, 21d) will be described. In the LED lighting device 1, the number of the grooves 21 formed in the cover 20 is not limited. Hereinafter, the grooves (21a, 21b, 21c, 21d) may be collectively referred to as "grooves 21".

  In the LED lighting device 1 according to the present embodiment, the respective grooves (21a, 21b, 21c, 21d) provided in the cover 20 are spaced apart from each other in the direction of the central axis 22 of the cover 20. . That is, the respective grooves (21a, 21b, 21c, 21d) extend in the circumferential direction 23 while being separated from each other.

  The cover unit 20 included in the LED lighting device 1 according to the present embodiment has a first region 25 and a second region 26 (see FIG. 1C). The first region 25 has a hollow portion whose inner diameter is substantially the same even when displaced in the direction of the central axis 22. The second region 26 is connected to the first region 25 and has a hollow portion whose inner diameter increases as the distance from the first region 25 increases. However, this shape is only an example. For example, with respect to the hollow portion provided in the second region 26, the inner diameter at the position farthest from the first region 25 is larger than the inner diameter at the position closest to the first region 25, and at the position between them, The inner diameter on the side closer to the one area 25 may be larger than the inner diameter on the side far from the first area 25.

  In the LED lighting device 1 of the present embodiment, the lamp 10 is accommodated in a hollow portion of the cover portion 20 on the first region 25 side. As described above, since the lamp 10 is configured by the LED module, the lamp 10 can be stably held in the first region 25 by appropriately designing the inner diameter of the hollow portion in the first region 25. It is possible.

  In the LED lighting device 1 of the present embodiment, grooves 21a, 21b, 21c, and 21d are provided in the cover 20 in order from the side closer to the first region 25. That is, the diameter of the circumference formed by extending these grooves (21a, 21b, 21c, 21d) increases in the order of the grooves 21a, 21b, 21c, 21d.

  In the LED lighting device 1 of the present embodiment, a groove 21 is provided on an outer surface of the surface of the cover 20. FIG. 2 is a schematic drawing in which a region A surrounded by a broken line in FIG. 1D is enlarged. On the outer surface of the cover portion 20, a groove portion 21 having an R shape when viewed in the extending direction is formed.

  The LED lighting device 1 of the present embodiment has a wiring housing portion 31 connected to the first region 25 side of the cover portion 20. For example, when the LED lighting device 1 is used by suspending it from a ceiling, a wiring for electrically connecting a power supply unit provided on the ceiling side and the lamp 10 housed in the first area 25 is used. Are provided in the wiring housing 31.

  The LED lighting device 1 of the present embodiment has a configuration in which the cover 20 can be folded back in the groove 21. 3A to 3D schematically show front views of the LED lighting device 1 when the cover portion 20 is folded back at different groove portions 21.

  FIG. 3A corresponds to the drawing when the cover 20 is folded outward at the position of the groove 21d from the state of FIG. 1C. FIG. 3B corresponds to the drawing when the cover 20 is folded back at the position of the groove 21c from the state of FIG. 1C. FIG. 3C corresponds to the drawing when the cover part 20 is folded at the position of the groove part 21b from the state of FIG. 1C. FIG. 3D corresponds to the drawing when the cover 20 is folded at the positions of the grooves 21d and 21b from the state of FIG. 1C. As shown in FIG. 3A, when the LED lighting device 1 of the present embodiment turns the cover portion 20 outward from the state of FIG. 1C with the groove portion 21 d arranged at the position farthest from the lamp 10, The other groove portions (21a, 21b, 21c) are hidden by the folded back surface of the cover portion 20. However, this configuration is only an example.

  As described above, since the LED lighting device 1 is configured so that the cover 20 can be folded back in the groove 21, the direction and intensity of light emitted from the lamp 10 change according to the shape of the cover 20. It is possible to do. FIG. 4 is a drawing comparing the mode (a) shown in FIG. 1C and the mode (b) shown in FIG. 3B. By folding back the cover 20, the distance between the opening 10 located on the side of the cover 20 opposite to the lamp 10 and the lamp 10 is reduced, and the way light spreads is changed.

  That is, the LED lighting device 1 of the present embodiment can freely change the lighting mode and the shape of the lighting device itself depending on whether or not the cover unit 20 is folded back and the position of the folded back. As a result, it is possible to use the apparatus in accordance with the usage mode required by the user, and a highly flexible lighting device is realized.

  Note that, as described above, in the LED lighting device 1 of the present embodiment, the groove 21 provided in the cover 20 has an R-shape when viewed along the extending direction. Accordingly, when the cover portion 20 is folded with reference to the line along the extending direction of the groove portion 1, the stress generated at the time of folding is dispersed along the folded curved surface. As a result, even if the cover portion 20 is repeatedly folded, a high load is suppressed from being applied to the groove portion 20, so that a problem in terms of durability is unlikely to occur.

  Further, in the LED lighting device 1 of the present embodiment, the groove portion 21 is provided on the outer surface of the cover portion 20, that is, on the surface located on the side opposite to the lamp 10. This makes it less likely that a shadow will appear on the surface of the cover 20 than when the groove 21 is provided inside. FIG. 5 is a drawing schematically showing this.

  In FIG. 5, (a) is a drawing corresponding to a case where the groove 21 is provided on the surface on the opposite side of the lamp 10, and is a configuration of the present embodiment. (B) is a drawing corresponding to the case where the groove 21 is provided on the same surface as the lamp 10. In the case of FIG. 5B, the light L emitted from the lamp 10 is applied to the edge of the groove 21 to form a shadow area 42, and the shadow area 42 is reflected on the cover 20. As a result, a bright area 41 and a shadow area 42 are formed in the cover unit 10. On the other hand, in the case of FIG. 5A, since the light L emitted from the lamp 10 is not irradiated to the edge of the groove 21, the shadow area 42 is completely or almost not formed on the cover 20. Instead, only the bright region 41 is formed.

  Note that, as described above, the cover portion 20 is made of a material capable of transmitting a part of the light radiated from the lamp 10. For this reason, according to the configuration of the present embodiment, in a part of the first region 25 in the cover part 20, the cover part 20 itself is illuminated with soft light.

[Second embodiment]
The configuration of the second embodiment of the LED lighting device will be described focusing on the points different from the first embodiment.

  6A and 6B are schematic external views of the LED lighting device 1 of the second embodiment. FIG. 6A is a perspective view, and FIG. 6B is a front view. In FIG. 6B, for the sake of explanation, some hidden parts are also indicated by broken lines. The LED lighting device 1 according to the second embodiment is different from the first embodiment in that the LED lighting device 1 further includes a shade unit 30. The shade portion 30 is made of a material that reflects a part of the light radiated from the lamp 10, and for example, a metal material, a ceramic material, a resin material, a glass material, or wood can be used.

  The shade portion 30 has a hollow shape having two opening surfaces arranged to face each other. In the present embodiment, these opening surfaces have different areas. Hereinafter, a side having a smaller area is referred to as a first opening surface, and a side having a larger area is referred to as a second opening surface. That is, as shown in FIG. 6B, the inner diameter of the first opening surface of the shade portion 30 is smaller than D1 and the inner diameter of the second opening surface is smaller than D2.

  The LED lighting device 1 shown in FIGS. 6A and 6B is configured such that the first region 25 side of the cover portion 20 is relatively moved to the first region 25 side of the shade portion 30 in a state where the folding back of the cover portion 20 at the groove portion 21 is released. This corresponds to a state in which it is inserted in a direction from the two opening surfaces to the first opening surface. Here, in the cover part 20, the outer diameter C1 of the first area 25 is smaller than the largest outer diameter C2 of the second area 26. The inner diameter D1 of the first opening surface of the shade portion 30 is larger than the outer diameter C1 of the first region 25 of the cover portion 20. Further, the inner diameter D2 of the second opening surface of the shade portion 30 is smaller than the outer diameter C2 of the second region 26 of the cover portion 20. For this reason, as shown in FIGS. 6A and 6B, the shade portion 30 makes contact with the inner side surface of the shade portion 30 and the outer side surface of the cover portion 20 at an intermediate position in the second region 26 of the cover portion 20. Is stabilized at this position.

  Also in the configuration of the present embodiment, the cover portion 20 may be folded back with an arbitrary groove portion 21 as a reference. As an example, FIG. 7 shows a front view when the cover portion 20 is folded back in the groove portion 21d. Note that, as described in the first embodiment, it is also possible to fold back at another groove.

  According to the LED lighting device of the present embodiment, when light is emitted from the lamp 10, in addition to the light generated in the case of the LED lighting device 1 of the first embodiment, the light reflected by the shade unit 30 is also used as illumination light. Used. Therefore, depending on the presence or absence of the shade portion 30, the illumination mode and the shape of the illumination device itself can be freely changed.

  In the present embodiment, the shade portion 30 is provided by inserting the first region 25 side of the cover portion 20 relatively in the direction from the first opening surface of the shade portion 30 toward the second opening surface. No problem. FIG. 8A is a perspective view in this case, and FIG. 8B is a front view. That is, this configuration corresponds to a configuration in which the shade unit 30 is turned upside down as compared with the configuration shown in FIGS. 6A and 6B. In this case, the light emitted from the lamp 10 and reflected by the shade unit 30 travels more diffusely than in the case of FIGS. 6A and 6B. That is, when the shade part 30 is attached to the cover part 20, the manner of illumination and the shape of the illumination device itself can be further freely changed by reversing the attachment direction of the shade part 30.

  8A and 8B, the cover portion 20 may be folded back with an arbitrary groove portion 21 as a reference. As an example, FIG. 9 shows a front view when the cover portion 20 is folded back in the groove portion 21d. Note that, as described in the first embodiment, it is also possible to fold back at another groove.

[Another embodiment]
Hereinafter, another embodiment will be described.

  In the above-described embodiment, the groove 21 is provided on the outer surface of the cover 20. However, the configuration in which the groove 21 is provided on the inner surface of the cover 20 is not excluded from the present invention. Also, the configuration of the above-described embodiment is merely an example as to the shape and the number of the groove portions 21.

  In the above-described embodiment, the case where the lamp 10 is configured by the LED module has been described, but it is not intended to exclude the case where the lamp 10 is configured by the LED bulb from the present invention.

1: LED lighting device 10: lamp 20: cover 21: groove 21a, 21b, 21c, 21d: groove 22: central axis of the cover 23: circumferential direction of the cover 25: first area of the cover 26: cover Second area 30: Shade part 31: Wiring accommodating part 41: Bright area 42: Shadow area

Claims (8)

A lamp including an LED element;
Having a hollow cover that covers the lamp,
The cover part,
On the side surface of the cover, has a groove extending in the circumferential direction to surround the central axis of the cover,
It transmits at least a part of the light emitted from the lamp, and is made of a deformable material when an external force is applied,
It is configured to be able to be folded on the basis of a line along the extending direction of the groove ,
The cover portion, in a state where the folded back of the cover portion is released,
A first region having a hollow portion whose inner diameter is substantially the same even when displaced in the central axis direction,
In connection with the first region, an inner diameter at a position farthest from the first region with respect to the central axis direction has a second region having a hollow portion larger than the inner diameter of the first region,
The LED lighting device, comprising: an LED module or an LED bulb including the LED element, and fixedly accommodated in a hollow portion located in the first region of the cover .   2. The LED lighting device according to claim 1, wherein, in a state where the folded back of the cover is released, the groove is provided only on an outer surface of the side of the cover. 3.   The LED lighting device according to claim 1, wherein the groove has a round shape when viewed along a direction in which the groove extends. The groove is provided on a side surface of the cover at a plurality of locations separated in a central axis direction of the cover,
The LED lighting device according to any one of claims 1 to 3, wherein each of the groove portions extends in a circumferential direction so as to surround a central axis of the cover portion while being separated from each other. .   When the cover portion is folded with reference to a line along the extending direction of the groove portion provided at a position farthest from the lamp with respect to the center axis direction of the cover portion, the side surface exposed to the outside by being folded back The LED lighting device according to claim 4, wherein all of the grooves are covered by the groove. A first opening surface, having a hollow shade portion including a second opening surface having a larger inner diameter than the first opening surface facing the first opening surface,
The cover portion is configured such that, in the second region, the inner diameter of the hollow portion increases with distance from the first region with respect to the central axis direction,
The shade unit includes:
It is made of a material that reflects at least a part of light emitted from the lamp,
The inner diameter of the first opening surface is larger than the outer diameter of the cover portion located in the first region, and smaller than the largest outer diameter of the cover portion located in the second region,
The inner diameter of the second opening surface is configured to be larger than the largest outer diameter of the cover portion located in the second region,
Any inner surface of the shade portion is in contact with the outer surface of said second region of said cover portion, said cover portion and the shade portion of the preceding claims, characterized in that it is integrally held or LED lighting device according to item 1. Distance opposite between the first opening surface of the shade portion and the second opening surface, according to claim 6, characterized in that less than the inter-end distance in the central axis direction of the cover portion LED lighting device. In a state where the folded back portion of the cover portion is released, when the cover portion is inserted relatively in a direction from the second opening surface of the shade portion toward the first opening surface, the inner surface of the shade portion is 7. The cover according to claim 6 , wherein all of the grooves provided in the cover are covered with the outer surface of the shade portion in a state where the outer surface of the cover is in stable contact with the outer surface in the second region. Or the LED lighting device according to 7 .

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