JP7627873B2 - Structure - Google Patents

Description

This disclosure relates to a structure.

Patent document 1 discloses a light-emitting device that includes a rod-shaped light guide made of a translucent material and equipped with a radiation-facing surface facing the external radiation surface of the main body and multiple semi-conical recesses provided at each corner formed by the radiation-facing surface and two adjacent surfaces adjacent to the radiation-facing surface, a light source that inputs light to the rod-shaped light guide, and a heat sink that is connected to a substrate on which the light source is mounted.

JP 2010-86683 A

There is a demand for structures that look better than those used as conventional rod-shaped light guides, while ensuring uniformity in the brightness of the emitted light and heat dissipation from the light source.

Therefore, the present disclosure aims to provide a structure that can ensure uniformity in the brightness of the light emitted from the structure and heat dissipation of the light source while suppressing deterioration of the structure's appearance.

In order to achieve the above-mentioned object, a structure according to one aspect of the present disclosure comprises a structure main body, a light source, a long light guide provided in the structure main body for guiding light emitted by the light source, and a heat sink provided in the structure main body and in which the light source is disposed, wherein the light guide is translucent and flexible, a prism is formed in the light guide for emitting the guided light to the outside, the light source, the light guide, and a first heat sink portion which is a part of the heat sink are provided outside the structure main body, and a second heat sink portion which is the remaining part of the heat sink is partially or entirely embedded inside the structure main body, and the second heat sink portion is thicker than the first heat sink portion.
In order to achieve the above-mentioned object, a structure according to one aspect of the present disclosure comprises a structure main body, a light source, a long light guide provided in the structure main body for guiding light emitted by the light source, and a heat sink provided in the structure main body and in which the light source is disposed, the light guide being translucent and flexible, the light guide having a prism formed therein for emitting the guided light to the outside, the light source, the light guide, and a first heat sink portion which is a part of the heat sink being provided on the outside of the structure main body, a second heat sink portion which is the remaining part of the heat sink being partially or entirely embedded inside the structure main body, and the light source being provided at the end of the first heat sink portion opposite the second heat sink portion side.
In order to achieve the above object, a structure according to one aspect of the present disclosure comprises a structure main body, a light source, a long light guide provided in the structure main body for guiding light emitted by the light source, and a heat sink provided in the structure main body and on which the light source is disposed, the light guide being translucent and flexible, the light guide having a prism formed therein for emitting the guided light to the outside, the prism being formed on the outer peripheral surface of the light guide along the longitudinal direction of the light guide, only on the side of the light guide facing the structure main body, and the heat sink being provided on the structure main body such that a portion of the heat sink is embedded in the structure main body and the remaining portion is exposed from the structure main body .

The structure according to the present disclosure can ensure uniformity in the brightness of the light emitted from the structure and heat dissipation of the light source while suppressing deterioration of the structure's appearance.

FIG. 1 is a perspective view showing a structure according to an embodiment. FIG. 2 is a cross-sectional view showing the structure taken along line II-II in FIG. FIG. 3 is a schematic diagram showing a light guide, a light source, and a heat sink of the structure according to the embodiment. FIG. 4 is a cross-sectional view showing the structure taken along line IV-IV in FIG. FIG. 5 is a schematic diagram showing a light guide, a light source, and a heat sink of the structure according to the embodiment. FIG. 6 is a schematic diagram showing a light guide, a light source, and another heat sink of a structure according to another modified example. FIG. 7 is a schematic diagram showing a light guide, a light source, and yet another heat sink of a structure according to another modified example. FIG. 8 is a cross-sectional view showing a structure according to another modified example.

The following describes the embodiments in detail with reference to the drawings. Note that the embodiments described below are all comprehensive or provide specific examples. The numerical values, shapes, materials, components, component placement and connection forms, steps, and order of steps shown in the following embodiments are merely examples and are not intended to limit the present disclosure. Furthermore, among the components in the following embodiments, components that are not described in an independent claim are described as optional components.

In the following, terms indicating the relationship between elements, such as parallelism, and terms indicating the form or shape of elements, such as elliptical, circular, polygonal prism, arc-shaped, hemispherical, pyramidal, frustum-shaped, long groove-shaped, conical, polygonal pyramid, L-shaped, T-shaped, etc., do not only indicate the strict meaning, but also include a range of substantial equivalence, for example, a difference of about a few percent.

Note that each figure is a schematic diagram and is not necessarily a precise illustration. In addition, in each figure, the same reference numerals are used for substantially the same configurations, and duplicate explanations may be omitted or simplified.

(Embodiment)
<Configuration: Structure>
The configuration of the structure according to the embodiment will be described.

Figure 1 is a perspective view showing a structure according to an embodiment. Figure 2 is a cross-sectional view showing the structure taken along line II-II in Figure 1.

As shown in Figures 1 and 2, the structure is a table, chair, shelf, lighting fixture, etc. The structure can illuminate its surroundings by emitting light from a light guide 30 provided at a predetermined location. In the following, a desk 1 will be used as an example of a structure. In this case, the light guide 30 is placed at the joint (boundary) between the top plate 12 and legs 11 of the desk 1, the edge of the top plate 12 of the desk 1, etc., as examples of predetermined locations, to illuminate the floor surface below the desk 1, the legs 11 of the desk 1, etc.

The desk 1 has a structure body 10, a light source 21, a light guide 30, a heat sink 40, and a control circuit (not shown). In this embodiment, a plurality of light sources 21, light guides 30, and heat sinks 40 are provided, but unless otherwise specified, the description will focus on one light source 21, one light guide 30, and one heat sink 40.

[Structure body part 10]
The structure body 10 has legs 11 and a top plate 12. In other words, the structure body 10 is a desk body.

The legs 11 are provided on the ground, a floor surface, etc., and extend approximately parallel along the Z-axis direction. The ends of the legs 11 on the negative Z-axis side are provided on the ground, a floor surface, etc., and the ends of the legs 11 on the positive Z-axis side are connected to and fixed to the top plate 12. In this embodiment, one leg 11 supports the top plate 12. Note that the number of legs 11 is not limited to one. Multiple legs 11 may be provided, and the top plate 12 may be supported by multiple legs.

The tabletop 12 is a flat plate that is approximately parallel to the horizontal plane. The tabletop 12 is connected to and fixed to the end of the leg 11 on the positive side of the Z axis, so that the upper surface of the tabletop 12 is supported approximately parallel to the horizontal plane.

[Light source 21]
The light source 21 is a light emitting module having at least one light emitting element. The light source 21 emits light when power is applied from a control circuit.

The light source 21 is provided on the outside of the structure body 10 so as to be exposed from the structure body 10. In this embodiment, the light source 21 is disposed near the joint between the top plate 12 and the legs 11. Specifically, the light source 21 is provided on a part of the heat sink 40 that protrudes from the structure body 10, and is provided on the outside of the legs 11. The light source 21 is exposed near the joint between the top plate 12 and the legs 11, but is covered by the cover body 13.

The light source 21 is disposed on the side of the entrance surface 31, which is the end surface side of the light guide 30. Specifically, the light source 21 is mounted on the substrate 22 so that the light emitting surface of the light source 21 faces the entrance surface 31 of the light guide 30 and the optical axis of the light source 21 intersects with the entrance surface 31 of the light guide 30, and is provided on the heat sink 40 via the substrate 22. Here, the optical axis is a straight line that approximately coincides with the main emission direction of the light emitted by the light source 21. In this embodiment, the light source 21 is provided so as to correspond one-to-one with the entrance surface 31 of the light guide 30. As will be described later, each of the end faces in the length direction of the light guide 30 is the entrance surface 31 for the light from the light source 21, so two light sources 21 are provided for one light guide 30. In this embodiment, four light guides 30 are provided on the desk 1, so eight light sources 21 are provided. The number of light guides 30 may be three or less, or five or more. The number of light sources 21 may be seven or less, or nine or more. A plurality of light sources 21 may be provided on the incident surface 31 of one light guide 30.

The light source 21 has a light-emitting element that is an LED chip, and a phosphor that emits fluorescence by wavelength conversion of the light emitted by the light-emitting element. For example, the light source 21 is configured to emit white light. Specifically, the light source 21 is composed of a COB (Chip On Board) type LED (Light Emitting Diode) element, and has a number of LEDs that are bare chips (LED chips), and a sealing member that seals the number of LEDs and contains a phosphor. Note that an SMD (Surface Mount Device) type LED may be used as the light source 21.

In this embodiment, the light source 21 is a four-color LED light source of RGBW, and emits four monochromatic lights of red, blue, green, and white, and may also emit colored light or white light obtained by dimming these four monochromatic lights. Note that the light source 21 may only emit light of one or more colors, or may emit three colors of RGB, or two colors of BW.

The light source 21 may be electrically connected to a power supply circuit and may be supplied with power from the power supply circuit. The desk 1 may also be provided with a power supply circuit. The light source 21 may be turned on and off by being controlled by a control circuit (not shown) provided in the power supply circuit. The light source 21 may be dimmed and its color adjusted by being controlled by a control circuit provided in the power supply circuit.

The control circuit controls the light sources 21. Specifically, the control circuit controls the light emission mode of the light emitted by the light sources 21 so that the light is lit in a predetermined light emission mode. For example, the control circuit controls the light emitted by all of the light sources 21 to be turned on and off (on and off), to change the brightness, or to change the light color. In this embodiment, since multiple light sources 21 are provided on the desk 1, the control circuit may individually control the light emission mode of the light emitted by all of the light sources 21.

[Light guide 30]
The light guide 30 is provided in the structure body 10 and is a long light-transmitting member that guides the light emitted by the light source 21. The light guide 30 guides (guides) the light emitted by the light source 21, thereby forming a light guide path for emitting the light from the outer peripheral surface of the light guide 30.

Figure 3 is a schematic diagram showing the light guide 30, light source 21, and heat sink 40 of the structure according to the embodiment.

1, 2 and 3, the light guide 30 is provided on the outside of the structure body 10 and is provided along the outer peripheral surface of the structure body 10. The light guide 30 is fixed to the structure body 10 by a support member (not shown). The light guide 30 may be provided in any manner on the desk 1. In this embodiment, the light guide 30 is provided along the joint between the top plate 12 and the leg 11. In this embodiment, a plurality of light guides 30, specifically, four light guides 30, are provided at the joint between the top plate 12 and the leg 11 so as to surround the leg 11 along the shape of the leg 11 in a plan view. In this embodiment, the four light guides 30 are elliptical so as to surround the periphery of the leg 11. The number of light guides 30 is not limited to four, and may be less than three or five or more. The arrangement of the plurality of light guides 30 is not limited to an elliptical shape. For example, it may be circular, polygonal, or a combination of these.

In this embodiment, the light guide 30 has a circular cross-sectional shape when cut along a plane perpendicular to the longitudinal direction, but the light guide 30 may also be a polygonal prism.

The light guide 30 is also translucent and flexible. The light guide 30 is made of a transparent material that is translucent, such as soft cycloolefin. The light guide 30 may also be made of a resin, such as silicone resin or acrylic resin.

The light guide 30 is rod- or string-shaped and has an incident surface 31 and an exit surface 32.

The incident surface 31 is the surface into which the light emitted by the light source 21 enters, and is the surface opposite the light emitting surface of the light source 21. In other words, the incident surface 31 is an end surface in the longitudinal direction of the light guide 30. In this embodiment, the light source 21 is disposed on each of both end surfaces in the longitudinal direction of the light guide 30, and therefore the incident surface 31 is each of both end surfaces in the longitudinal direction of the light guide 30.

In this embodiment, the incident surface 31 is arranged so as to be in contact with the light emitting surface of the light source 21, but it may also be spaced apart from the light source 21 so as to leave a gap therebetween (to form an air layer).

The end of the light guide 30 on the side of the incident surface 31 is covered by the cover body 13 together with the light source 21. The position of the end of the light guide 30 on the side of the incident surface 31 is supported by the cover body 13.

The exit surface 32 is an outer peripheral surface formed along the length of the light guide 30, and is the surface from which the light guided into the light guide 30 exits. As shown in FIG. 4, a prism 30a is formed on the outer peripheral surface of the light guide 30 for emitting the light guided by the light guide 30 (light guided inside) to the outside. FIG. 4 is a cross-sectional view showing the structure taken along line IV-IV in FIG. 1.

The prism 30a may be formed on the entire outer peripheral surface of the light guide 30, or may be formed on only a part of the outer peripheral surface of the light guide 30. In this embodiment, the prism 30a is formed only on the side facing both the leg 11 and the top plate 12, which are the structure body 10. Specifically, in the circular cross section of the light guide 30 when the light guide 30 is cut on a plane perpendicular to the longitudinal direction of the light guide 30, the prism 30a is formed on the curved surface of the cross section facing the outer surface of the leg 11 and the bottom surface of the top plate 12 from the point of contact with the outer surface of the leg 11 to the point of contact with the bottom surface of the top plate 12. The prism 30a is a convex or concave portion having a hemispherical shape, a pyramid shape (including a conical shape and a polygonal pyramid shape), a frustum shape (including a conical shape and a polygonal pyramid shape), a triangular, semicircular or trapezoidal cross section when cut on a plane perpendicular to the longitudinal direction. In this embodiment, the prism 30a is conical.

[Heat sink 40]
FIG. 5 is a schematic diagram showing a light guide 30, a light source 21, and a heat sink 40 of the structure according to the embodiment.

As shown in Figures 4 and 5, the light source 21 is provided and arranged on the heat sink 40. The heat sink 40 dissipates heat generated by the light source 21. The heat sink 40 is provided on the desk 1 so that a portion of the heat sink 40 is embedded in the desk 1 and the remaining portion is exposed from the desk 1. In this embodiment, the heat sink 40 is fixed to the leg 11 by a fastening member such as a screw.

The heat sink 40 has a first heat sink portion 41 which is a part of the heat sink 40, and a second heat sink portion 42 which is the remaining part of the heat sink 40.

The first heat sink portion 41 is provided on the structure body portion 10. In other words, the first heat sink portion 41 is provided on the outside of the structure body portion 10 so that the whole or part of the first heat sink portion 41 is exposed from the legs 11 and the top plate 12 of the structure body portion 10, and protrudes from each of the outer surfaces of the legs 11 and the underside of the top plate 12. The first heat sink portion 41 is also arranged on the incident surface 31 side, which is the end face side of the light guide 30. In this embodiment, the first heat sink portion 41 is arranged together with the light source 21 at the joint of the light guide 30, which is between two adjacent light guides 30 among the multiple light guides 30.

The light source 21 is also provided and arranged on the first heat sink section 41. That is, the light source 21 is provided directly on the first heat sink section 41 or indirectly via a substrate 22 or the like to dissipate heat generated by the light source 21. Such a light source 21 is provided on the end of the first heat sink section 41 opposite the second heat sink section 42 side. That is, by providing the light source 21 on the tip side of the first heat sink section 41, the amount of protrusion from the outer surface of the leg section 11 can be suppressed as much as possible.

In particular, the light source 21 is disposed at the end of the first heat sink portion 41, but from the viewpoint of heat dissipation, it is preferable that the light source 21 be disposed in the central portion of the first heat sink portion 41 in the Z-axis direction. For this reason, the light source 21 may be disposed close to the central portion of the first heat sink portion 41.

The second heat sink portion 42 is partially or entirely embedded inside the structure body portion 10. In other words, the second heat sink portion 42 is partially or entirely covered by the leg portion 11, which is the structure body portion 10, and is fixed inside the leg portion 11.

The heat sink 40 is a metal heat dissipation member in the shape of a long plate or rod. In this embodiment, the heat sink 40 is made of die-cast aluminum, but it may be made of metal containing iron, copper, etc. Note that a resin heat dissipation member may also be used as long as heat dissipation properties are ensured.

Moreover, the larger the volume of the heat sink 40, the more the heat dissipation of the light source 21 can be improved. Therefore, the volume of the heat sink 40 can be set according to the output of the light source 21. That is, the thickness, length, and other dimensions of the heat sink 40 can be set. Specifically, when the central luminous flux of the light emitted from the light source 21 is required to be 400 (lm), the amount of heat of the light source 21 is converted to about 4.7 (W), and based on the relational expression between the thermal resistance of the heat sink 40 due to the amount of heat, 14.3 (°C/W), and the envelope volume, the required volume of the heat sink 40 is about 20 ^cm3 .

Depending on the output of the light source 21, in this embodiment, the volume of the first heat sink section 41 is larger than the volume of the second heat sink section 42.

In this embodiment, the heat sink 40 is configured such that the first heat sink portion 41 and the second heat sink portion 42 are integrally formed, but they may be separate bodies fastened together by a fixing member or the like.

[Control circuit]
The control circuit controls the light source 21 by supplying power to the light source 21. Specifically, the control circuit controls the light emission mode of the light emitted by the light source 21 so that the light source 21 is turned on in a predetermined light emission mode. The control circuit generates, for example, a driving power for making the light source 21 emit light. Specifically, the control circuit generates a driving power for making the light source 21 emit light, and supplies this driving power to the light source 21. That is, the control circuit converts commercial AC power into DC power, and supplies this DC power to the light source 21 as driving power for making the light source 21 emit light, thereby making the light source 21 emit light. For example, the control circuit controls the light emitted by all the light sources 21 to be turned on and off (on and off), change the brightness, or change the light color. In this embodiment, since multiple light sources 21 are provided on the desk 1, the control circuit may individually control the light emission mode of the light emitted by all the light sources 21. The control circuit is, for example, a power supply control circuit in which multiple electronic components are mounted on a printed circuit board.

<Operation>
In such a structure, when the control circuit causes each light source 21 to emit light, the light emitted by each light source 21 enters the incident surface 31 of each light guide 30 and is guided inside. The light guided inside the light guide 30 is reflected by the prism 30a of the light guide 30 and is emitted from the exit surface 32 on the opposite side to the prism 30a. In addition, since the prism 30a is formed only on the side of the light guide 30 facing the legs 11 and the top plate 12, the light emitted from the exit surface 32 has a directivity (has a maximum radiation intensity) in a direction of about 45° with respect to the Z-axis direction. This makes it possible to illuminate the floor surface below the desk 1, the legs 11 of the desk 1, etc.

<Action and effect>
The effects of the desk 1 according to the embodiment will be described.

As described above, the desk 1 according to this embodiment includes a structure body 10, a light source 21, a long light guide 30 provided in the structure body 10 to guide the light emitted by the light source 21, and a heat sink 40 provided in the structure body 10 and on which the light source 21 is disposed. The light guide 30 is translucent and flexible. The light guide 30 is formed with a prism 30a for emitting the guided light to the outside.

For example, in conventional structures, a heat sink is placed on the side of the light source opposite the light guide, which means that the light source side relative to the light guide tends to become large. In this case, if this is applied to a desk like the one in this embodiment, the heat sink portion will bulge, degrading the overall appearance of the desk.

However, according to this embodiment, for example, the light source 21 and the heat sink 40 can be arranged inside the structure body 10, or a part of the light source 21 and the heat sink 40 can be arranged outside the structure body 10. This makes it possible to reduce the amount of exposure of the light source 21 and the heat sink 40 to the desk 1. This makes it difficult for the appearance of the desk 1 to be impaired, in other words, the overall appearance of the desk 1 can be improved.

In addition, since the light source 21 is provided on the heat sink 40, that is, the light source 21 and the heat sink 40 are thermally connected, the heat generated by the light source 21 can be dissipated to the heat sink 40.

In addition, in order to suppress uneven brightness of the light emitted from the light guide 30, prisms 30a are formed in the light guide 30, and the light guide 30 is adjusted to an appropriate length, so that light with suppressed uneven brightness can be emitted to the outside.

This makes it possible to ensure uniformity in the brightness of the light emitted from the desk 1 and the heat dissipation of the light source 21 while minimizing deterioration in the appearance of the desk 1.

In addition, in the desk 1 according to this embodiment, the light source 21, the light guide 30, and the first heat sink portion 41, which is a part of the heat sink 40, are provided on the outside of the structure body portion 10. And, the second heat sink portion 42, which is the remaining part of the heat sink 40, is partially or entirely embedded inside the structure body portion 10.

For example, in conventional structures, when a heat sink is provided for a light source, the heat sink is placed on the opposite side of the light source to the light guide. In this case, the heat sink makes it impossible to place the light guide, and that area becomes dark. When it is required to ensure uniformity in the brightness of the light emitted from the desk, even if multiple light guides are arranged, the light source is placed between two adjacent light guides, and a heat sink is also placed to dissipate the heat generated by the light source, so the distance between two adjacent light guides tends to be large.

Furthermore, if the light guide is long, the brightness of the light emitted from the light guide will become uneven as it moves away from the light source. Therefore, it is possible to ensure uniformity in the brightness of the light emitted from the light guide by increasing the output of the light source. Even in this case, the volume of the heat sink for dissipating the heat generated by the light source will be large, which may result in the heat sink becoming larger and the appearance deteriorating. Even when multiple light guides are arranged, the distance between two adjacent light guides tends to be large, as mentioned above.

For these reasons, in conventional structures, the physical appearance (appearance) can be compromised due to the placement of the heat sink, and the lighting appearance can be compromised due to the creation of areas where light is not emitted (dark areas).

However, according to this embodiment, the second heat sink part 42 can be embedded inside the desk 1 and the first heat sink part 41 can be provided on the outside of the desk 1, so compared to the conventional case where the entire heat sink is placed on the outside of the desk, the desk 1 in this embodiment can be prevented from becoming large and the appearance of the desk 1 is less likely to be impaired.

In addition, even when multiple light guides 30 are arranged, the distance between two adjacent light guides 30 can be prevented from becoming too large, so the physical appearance (appearance) is not easily impaired by the arrangement of the heat sink 40, and the number of areas where light is not emitted (dark areas) can be reduced, thereby preventing a decrease in the appearance of the lighting.

In addition, in the desk 1 according to this embodiment, the light source 21 is provided at the end of the first heat sink section 41 opposite the second heat sink section 42.

This allows the heat generated by the light source 21 to be dissipated to the first heat sink portion 41 and the second heat sink portion 42, thereby preventing the light source 21 from becoming too hot. This makes it possible to prevent a decrease in the light emission efficiency of the light source 21.

The light source 21 can also be placed on the first heat sink section 41 provided on the outside of the structure body section 10. In this case, the light source 21 and the first heat sink section 41 are simply placed between two adjacent light guides 30, so the gap between the two adjacent light guides 30 is unlikely to become large. This makes it difficult for the appearance of the desk 1 to be impaired.

In addition, in the desk 1 according to this embodiment, the light source 21 and the first heat sink section 41 are arranged on the end face side of the light guide 30.

This allows the light source 21 and the first heat sink portion 41 to be placed only on the outside of the desk 1. In other words, there is no need to place the entire heat sink 40 on the outside of the desk 1. In addition, since the light source 21 and the first heat sink portion 41 are only placed between two adjacent light guides 30, the gap between the two adjacent light guides 30 is unlikely to become large. This makes it difficult for the appearance of the desk 1 to be impaired.

In addition, in the desk 1 according to this embodiment, the light guide 30 is provided along the outer peripheral surface of the structure main body 10.

This allows the light emitted by the light guide 30 to be emitted outside the desk 1, thereby illuminating the area around the desk 1. In addition, the light guide 30 can be arranged along the outer periphery of the structure main body 10, so the appearance of the desk 1 is not easily impaired.

(Other variations, etc.)
Although the present disclosure has been described above based on the embodiments, the present disclosure is not limited to these embodiments.

For example, the structure of this embodiment may be a heat sink 40a as shown in FIG. 6. FIG. 6 is a schematic diagram showing the light guide 30, the light source 21, and another heat sink 40a of the structure according to another modified example. The second heat sink portion 42 may be thicker than the first heat sink portion 41. That is, the second heat sink portion 42 is cylindrical than the first heat sink portion 41. The thickness of the second heat sink portion 42 in a direction perpendicular to the longitudinal direction (Y-axis direction) is thicker than the thickness of the first heat sink portion 41 in a direction perpendicular to the longitudinal direction (Y-axis direction). In the desk 1 according to this embodiment, the second heat sink portion 42 is thicker than the first heat sink portion 41. According to this, the heat generated by the light source 21 can be dissipated to the first heat sink portion 41 and the second heat sink portion 42, so that the light source 21 can be prevented from becoming too hot. In addition, even if a portion of the heat sink 40a is thickened in this way, the necessary volume of the heat sink 40a for dissipating the heat generated by the light source 21 can be secured, that is, the heat dissipation performance can be secured. This makes it possible to suppress a decrease in the light emission efficiency of the light source 21. Furthermore, by making the second heat sink portion 42 thick, it is possible to suppress the lengthening of the heat sink 40a. Therefore, even if the thickness in the Y-axis direction is small in the leg portion 11 of the desk 1 of this embodiment, the second heat sink portion 42 can be accommodated within the leg portion 11 according to the size of the leg portion 11. Therefore, the second heat sink portion 42 is prevented from protruding from the leg portion 11, and the appearance of the desk 1 is less likely to be impaired.

In addition, the structure in this embodiment may be a heat sink 40b as shown in FIG. 7. FIG. 7 is a schematic diagram showing the light guide 30, the light source 21, and yet another heat sink 40b of the structure according to another modified example. The heat sink 40b may have a bent portion 43 in which the second heat sink portion 42 is bent relative to the first heat sink portion 41. That is, the heat sink 40b has a part that is bent in an L-shape, a T-shape, or the like, that is, the bent portion 43. The bent portion 43 is embedded inside the structure main body portion 10. In this embodiment, the bent portion 43 is covered by the leg portion 11 and is disposed inside the leg portion 11. In this embodiment, the second heat sink portion 42 is bent along the X-axis direction. The direction in which the second heat sink portion 42 is bent relative to the first heat sink portion 41 is not particularly limited. For example, the second heat sink portion 42 may extend along the Z-axis direction, and may be bent so as to be inclined relative to the X-axis direction, the Y-axis direction, and the Z-axis direction. Thus, in the desk 1 according to the present embodiment, the heat sink 40b has a bent portion 43 in which the second heat sink portion 42 is bent relative to the first heat sink portion 41. The bent portion 43 is embedded inside the structure body portion 10. According to this, the heat generated by the light source 21 can be dissipated to the first heat sink portion 41 and the second heat sink portion 42, so that the temperature of the light source 21 can be suppressed. In addition, even if a part of the heat sink 40b is bent in this way, the necessary volume of the heat sink 40b for dissipating the heat generated by the light source 21, that is, the heat dissipation property can be secured. This makes it possible to suppress a decrease in the light emission efficiency of the light source 21. Furthermore, by bending the second heat sink portion 42 relative to the first heat sink portion 41, it is also possible to suppress the lengthening of the heat sink 40b. Therefore, even if the thickness in the Y-axis direction is small in the leg portion 11 of the desk 1 according to the present embodiment, the second heat sink portion 42 can be accommodated in the leg portion 11 according to the size of the leg portion 11. This prevents the second heat sink portion 42 from protruding from the leg portion 11, making it less likely to impair the appearance of the desk 1.

In addition, in the structure of this embodiment, as shown in FIG. 8, a lens 50 may be disposed between the light emitting surface of the light source 21 and the incident surface 31 of the light guide 30. FIG. 8 is a cross-sectional view showing a structure according to another modified example. FIG. 8 shows an example in which a lens 50 is disposed only on one of two adjacent light guides 30, but this is not limited to this. For example, a lens 50 may be disposed on both sides of each of the two adjacent light guides 30.

In addition, in the structure of this embodiment, the light source and heat sink are provided on the outside of the structure body, but this is not limited to this. For example, the light source and heat sink may be entirely embedded inside the structure body. In this case, only the light guide may be provided on the outside of the structure body. In this case, the distance between two adjacent light guides can be made as small as possible.

In addition, in the structure of this embodiment, the light guide can be pulled to pop out from the main body of the structure. In other words, the light guide can be positioned above the desk top. In this case, the light guide can be used to illuminate the upper surface of the desk top like a desk lamp.

In addition, this disclosure also includes forms obtained by applying various modifications to the embodiments that a person skilled in the art may conceive, and forms realized by arbitrarily combining the components and functions of the embodiments within the scope of the spirit of this disclosure.

1 Desk (structure)
10 Structure body 21 Light source 30 Light guide 30a Prism 31 Incident surface (end surface of light guide)
40, 40a, 40b Heat sink 41 First heat sink portion 42 Second heat sink portion 43 Bent portion

Claims (9)

A structure body portion,
A light source;
A long light guide provided in the main body of the structure and guiding the light emitted by the light source;
a heat sink provided on the structural body and on which the light source is disposed;
The light guide is transparent and flexible,
The light guide is provided with a prism for emitting the guided light to the outside.
the light source, the light guide, and a first heat sink portion that is a part of the heat sink are provided outside the structure body portion,
A part or the whole of a second heat sink portion, which is the remaining part of the heat sink, is embedded inside the main body portion of the structure,
The second heat sink portion is thicker than the first heat sink portion. A structure body portion,
A light source;
A long light guide provided in the main body of the structure and guiding the light emitted by the light source;
a heat sink provided on the structural body and on which the light source is disposed;
The light guide is transparent and flexible,
The light guide is provided with a prism for emitting the guided light to the outside.
the light source, the light guide, and a first heat sink portion that is a part of the heat sink are provided outside the structure body portion,
A part or the whole of a second heat sink portion, which is the remaining part of the heat sink, is embedded inside the main body portion of the structure,
The light source is provided at an end of the first heat sink portion opposite to the second heat sink portion. A structure body portion,
A light source;
A long light guide provided in the main body of the structure and guiding the light emitted by the light source;
a heat sink provided on the structural body and on which the light source is disposed;
The light guide is transparent and flexible,
The light guide is provided with a prism for emitting the guided light to the outside.
The prisms are formed on an outer peripheral surface of the light guide along a longitudinal direction of the light guide, and only on a side of the light guide facing the main body of the structure ,
The heat sink is provided in the structure body such that a portion of the heat sink is embedded in the structure body and the remaining portion is exposed from the structure body.
Struct. the light source, the light guide, and a first heat sink portion that is a part of the heat sink are provided outside the structure body portion,
The structure according to claim 3 , wherein a part or the whole of a second heat sink portion which is the remaining part of the heat sink is embedded inside the main body portion of the structure. The structure of claim 4 , wherein the second heat sink portion is thicker than the first heat sink portion. the heat sink has a bent portion at which the second heat sink portion is bent relative to the first heat sink portion,
The structure according to claim 1 , wherein the bent portion is embedded inside the main body of the structure. The structure according to any one of claims 1 to 6, wherein the light source is provided at an end of the first heat sink portion opposite to the second heat sink portion. The structure according to any one of claims 1 to 7, wherein the light source and the first heat sink portion are disposed on an end face side of the light guide. The structure according to any one of claims 1 to 8, wherein the light guide is provided along an outer circumferential surface of the structure body.

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