JP2021153052A - Lighting device - Google Patents

Abstract

To provide a lighting device in which heat generated by a power supply circuit is hardly transmitted to a storage battery.SOLUTION: A lighting device 10 includes: a light emitting part 20; a storage cell 40 which supplies a power to the light emitting part 20; a power supply circuit 50 which converts an AC power supplied from an outside into a DC power and supplies it to the light emitting part 20; and a bottom plate 31 which has a first region loaded with the storage cell 40 and a second region loaded with the power supply circuit 50. A slit part 34 is provided at a position between the first region and the second region of the bottom plate 31.SELECTED DRAWING: Figure 2

Description

The present invention relates to a lighting device including a storage battery.

In recent years, LED lighting devices have become widespread. For example, Patent Document 1 discloses an LED lighting device having a waterproof structure for use outdoors or the like.

Japanese Unexamined Patent Publication No. 2013-03744

In a lighting device, a structure is required in which the heat generated by a light emitting unit (light source) is not easily transferred to parts having low heat resistance. For example, a storage battery can be said to be a component having a relatively low upper limit of the environmental temperature when used and having low heat resistance. In a lighting device including a storage battery, it is preferable that the heat generated by the light emitting unit is not easily transferred to the storage battery.

The present invention provides a lighting device in which heat generated by a power supply circuit is not easily transferred to a storage battery.

The lighting device according to one aspect of the present invention includes a light emitting unit, a storage battery that supplies power to the light emitting unit, a power supply circuit that converts AC power supplied from the outside into DC power, and supplies the power supply circuit to the light emitting unit. A bottom plate having a first region on which the storage battery is mounted and a second region on which the power supply circuit is mounted is provided, and the first region and the second region of the bottom plate are provided. A slit portion is provided at the position between them.

According to the present invention, a lighting device in which the heat generated by the power supply circuit is not easily transferred to the storage battery is realized.

FIG. 1 is an external perspective view of the lighting device according to the embodiment as viewed from below. FIG. 2 is an exploded perspective view of the lighting device according to the embodiment as viewed from below. FIG. 3 is an exploded perspective view of the lighting device according to the embodiment as viewed from above. FIG. 4 is a plan view (schematic view) for explaining the shape of the slit portion. FIG. 5 is a plan view for explaining the simulation model. FIG. 6 is a diagram showing a simulation result. FIG. 7 is a first view showing the shape of the bent slit portion. FIG. 8 is a second view showing the shape of the bent slit portion. FIG. 9 is a third view showing the shape of the bent slit portion. FIG. 10 is a fourth view showing the shape of the bent slit portion. FIG. 11 is a fifth view showing the shape of the bent slit portion. FIG. 12 is a first view showing an arc-shaped slit portion. FIG. 13 is a second view showing an arc-shaped slit portion. FIG. 14 is a diagram showing an example of a slit portion composed of a plurality of holes. FIG. 15 is a diagram showing another example of a slit portion composed of a plurality of holes. FIG. 16 is a diagram showing an example of a slit portion that separates the bottom plate into two.

Hereinafter, embodiments will be specifically described with reference to the drawings. It should be noted that all of the embodiments described below show comprehensive or specific examples. The numerical values, shapes, materials, components, and the like shown in the following embodiments are examples, and are not intended to limit the present invention. Further, among the components in the following embodiments, the components not described in the independent claims indicating the highest level concept are described as arbitrary components.

Further, each figure is a schematic view and is not necessarily exactly illustrated. In each figure, substantially the same configuration is designated by the same reference numerals, and duplicate description may be omitted or simplified.

In the drawings of the following embodiments, the Z-axis direction is, for example, the vertical direction (vertical direction), and the Z-axis + side may be described as an upper side or a ceiling side. Further, the Z-axis-side may be described as a lower side or a light emitting side. Further, the X-axis direction and the Y-axis direction are directions orthogonal to each other on a plane (horizontal plane) perpendicular to the Z-axis. Further, in the following embodiments, the plan view means viewing from the Z-axis direction.

(Embodiment)
First, the configuration of the lighting device according to the embodiment will be described in detail. FIG. 1 is an external perspective view of the lighting device according to the embodiment as viewed from below. FIG. 2 is an exploded perspective view of the lighting device according to the embodiment as viewed from below. FIG. 3 is an exploded perspective view of the lighting device according to the embodiment as viewed from above.

As shown in FIGS. 1 to 3, the lighting device 10 includes a light emitting unit 20, a housing 30, a storage battery 40, a power supply circuit 50, a cover 60, a first seal member 70, and a second seal member. Equipped with 80.

The lighting device 10 is a closed type lighting device for the purpose of waterproofing or dustproofing. The lighting device 10 is used, for example, in an outdoor space or a semi-outdoor space. Specifically, the lighting device 10 is attached to the ceiling of the semi-outdoor space as a ceiling light, but may be attached to the wall surface as a bracket light. The use of the lighting device 10 is not particularly limited.

The plan view shape (shape seen from the Z-axis direction) of the lighting device 10 is circular. In the following embodiments, the lighting device 10 will be described as being mounted on the ceiling. The closed type lighting device is a lighting device in which the gap leading to the inside of the lighting device is minimized.

The light emitting unit 20 functions as a light source of the lighting device 10. Specifically, the light emitting unit 20 is a COB (Chip On Board) type light emitting module in which an LED chip directly mounted on a substrate is sealed with a translucent resin containing a phosphor. The light emitting unit 20 emits white light downward, for example. That is, the light emitting unit 20 emits white light toward the cover 60.

The light emitting portion 20 is placed on the convex portion 33 of the housing 30 and screwed to the convex portion 33. The light emitting unit 20 has a circular light emitting region.

The housing 30 is a substantially bottomed cylindrical member, and houses a light emitting unit 20, a storage battery 40, and a power supply circuit 50. The plan view shape of the housing 30 is a circle having a diameter of about 20 cm to 30 cm. The housing 30 is formed, for example, by die-casting aluminum. The housing 30 may be made of other metal or resin material. Specifically, the housing 30 includes a bottom plate 31 and a side wall 32.

The bottom plate 31 is a plate material having a circular shape in a plan view. A storage battery 40 and a power supply circuit 50 are placed on the lower surface of the bottom plate 31. Further, on the lower surface of the bottom plate 31, a convex portion 33 projecting downward is provided. Although not shown, a terminal block into which an electric wire from the outside is inserted is placed on the lower surface of the bottom plate 31, and a terminal block for electrically connecting the electric wire and the power supply circuit 50 is also mounted.

The bottom plate 31 also functions as a heat radiating plate for releasing the heat generated by the light emitting unit 20 when the light emitting unit 20 shines. The bottom plate 31 does not have a wiring pattern unlike the circuit board. Here, the bottom plate 31 is provided with a slit portion 34.

The slit portion 34 is an example of an opening, and specifically, is a linear opening extending in the X-axis direction. The slit portion 34 is a through hole penetrating the bottom plate 31, but may be a slit-shaped notch. The slit portion 34 is provided at a position on the bottom plate 31 between the convex portion 33 and the storage battery 40, and prevents the heat generated by the light emitting portion 20 from being transferred to the storage battery 40. That is, according to the slit portion 34, the heat generated by the light emitting portion 20 is less likely to be transferred to the storage battery 40. The detailed configuration of the slit portion 34 will be described later.

The side wall 32 is a portion of the housing 30 that is erected along the edge of the bottom plate 31, and surrounds the light emitting portion 20, the convex portion 33, the storage battery 40, and the power supply circuit 50 from the side. The side wall 32 is annular. The lower end portion of the side wall 32 protrudes in a brim shape toward the center side, and a groove portion 35 (groove structure) is provided on the inner peripheral surface of the protruding portion. The edge of the cover 60 and the first seal member 70 are inserted into the groove portion 35. The first seal member 70 closes the gap between the groove portion 35 and the cover 60 by being sandwiched between the groove portion 35 and the edge of the cover 60.

The convex portion 33 is a portion of the housing 30 that functions as a mounting table on which the light emitting portion 20 is mounted. The convex portion 33 is provided, for example, at the central portion (circular central portion) of the bottom plate 31. In a plan view, the convex portion 33 is arranged between the storage battery 40 and the power supply circuit 50. The plan view shape of the convex portion 33 is a rectangle (substantially square). Although the convex portion 33 is integrally formed with the bottom plate 31, it may be attached to the bottom plate 31 as a separate body from the bottom plate 31.

The storage battery 40 is a power source that supplies electric power to the light emitting unit 20. The storage battery 40 is used as an emergency power source, for example, when the supply of AC power from the outside is stopped. The storage battery 40 is, for example, a lithium ion battery. The storage battery 40 may be a nickel-metal hydride battery or the like as long as it is a storage battery that can be charged and discharged. The storage battery 40 is placed on the lower surface of the bottom plate 31.

The power supply circuit 50 converts AC power supplied from the outside of the lighting device 10 into DC power and supplies it to the light emitting unit 20. Specifically, AC power is supplied from an external AC power source via an electric wire inserted into a terminal block (not shown). The power supply circuit 50 is mounted on the lower surface of the bottom plate 31. Specifically, the power supply circuit includes a rectifier circuit, an inverter circuit, and the like. The power supply circuit 50 is covered with a resin cover in order to improve waterproofness and dustproofness.

Further, the power supply circuit 50 includes a charging circuit for charging the storage battery 40. The charging circuit converts the AC power supplied from the outside of the lighting device 10 into DC power suitable for charging the storage battery 40, and charges the storage battery 40 with the DC power.

Further, the power supply circuit 50 also includes a detection circuit for detecting the stoppage (power failure) of the supply of AC power from the outside and a discharge circuit for discharging the storage battery 40. When the detection circuit detects a power failure, the discharge circuit discharges the storage battery 40. As a result, the storage battery 40 supplies DC power to the light emitting unit 20. As a result, the lighting device 10 can continue to emit light even during a power failure.

The cover 60 is a substantially circular dome-shaped optical member (glove) protruding downward. The cover 60 has translucency and is attached to the side opposite to the bottom plate 31 of the housing 30. Specifically, the cover 60 is attached to the housing 30 by inserting the edge of the cover 60, which protrudes outward in a brim shape, into the groove 35 provided at the lower end of the housing 30.

The cover 60 is formed of, for example, a translucent material such as a silicone resin, an acrylic resin, a polycarbonate resin, or glass. Further, the cover 60 may be formed of a white resin or glass containing a light diffusing material (fine particles) such as silica or calcium carbonate and may have light diffusing property.

The first seal member 70 is a so-called O-ring, and by sandwiching it between the groove 35 and the edge of the cover 60, the gap between the groove 35 and the cover 60 is closed. As a result, the gap between the groove 35 and the cover 60 is sealed. The first seal member 70 is formed of, for example, an elastic resin member (rubber, elastomer, etc.).

The second seal member 80 is a sheet-like seal member having a circular plan view shape. The second seal member 80 closes the slit portion 34 by covering the slit portion 34 from the outside of the bottom plate 31. As a result, the slit portion 34 is sealed. The second seal member 80 is formed of, for example, an elastic resin member (rubber, elastomer, etc.). The lighting device 10 may include a second seal member sandwiched between the slit portions 34 in addition to the second seal member 80 or instead of the second seal member 80. As a result, the slit portion 34 is sealed.

[Detailed configuration of slit part]
Next, the detailed configuration of the slit portion 34 will be described. FIG. 4 is a plan view (schematic view) for explaining the shape of the slit portion 34. In addition, in FIGS. 1 to 3, the slit portion 34 and the light emitting portion 20 (convex portion 33) are close to each other, but the slit portion 34 and the light emitting portion 20 (convex portion 33) are as shown in FIG. May be far away.

The slit portion 34 is a linear opening extending in the X-axis direction intersecting the alignment direction (Y-axis direction) of the light emitting portion 20 (convex portion 33) and the storage battery 40. The slit portion 34 is provided at a position on the bottom plate 31 between the light emitting portion 20 (convex portion 33) and the storage battery 40, and prevents the heat generated by the light emitting portion 20 from being transmitted to the storage battery 40. That is, according to the slit portion 34, the heat generated by the light emitting portion 20 is less likely to be transferred to the storage battery 40.

Further, the slit portion 34 is provided at a position on the bottom plate 31 between the power supply circuit 50 and the storage battery 40. This prevents the heat generated by the power supply circuit 50 from being transferred to the storage battery 40. That is, according to the slit portion 34, the heat generated by the power supply circuit 50 is less likely to be transferred to the storage battery 40.

As shown in FIG. 4, in the lighting device 10, the storage battery 40, the slit portion 34, the light emitting portion 20 (convex portion 33), and the power supply circuit 50 are straight lines (line segments) passing through the center of the bottom plate 31. They are arranged side by side in this order on the top. The slit portion 34 is long in the direction (X-axis direction) intersecting (orthogonal) with the arrangement direction (Y-axis direction) of these parts. However, such a component arrangement is an example, and in the lighting device 10, the slit portion 34 may be arranged at least between the light emitting unit 20 and the storage battery 40.

In order to make it difficult for heat to be transferred to the storage battery 40, the length of the slit portion 34 (the length in the X-axis direction) should be long. Hereinafter, the simulation result of the temperature rise of the housing 30 (bottom plate 31) according to the length of the slit portion 34 will be described. First, the simulation model will be described. FIG. 5 is a plan view for explaining the simulation model.

As shown in FIG. 5, in the simulation model, the light emitting portion 20 is arranged at the center of the bottom plate 31. In a plan view, the light emitting unit 20 is a substantially square whose one side length (each of the width in the X-axis direction and the width in the Y-axis direction) is a.

A slit portion 34 is arranged next to the light emitting portion 20 on the + side in the Y-axis direction. The slit portion 34 is arranged between the light emitting portion 20 and the temperature measurement position. The temperature measurement position is a position on the bottom plate 31 that is separated from the center of the light emitting unit 20 in the Y-axis direction + side by a distance a.

In the above simulation model, the length of the slit portion 34 in the X-axis direction (hereinafter, also simply referred to as the slit length) and the temperature rise at the measurement position were simulated using the light emitting portion 20 as a heat source. FIG. 6 is a diagram showing a simulation result.

The vertical axis of FIG. 6 shows the temperature rise reduction rate. The temperature rise reduction rate is expressed by the following formula with the temperature at the measurement position when the slit portion 34 is not provided as a reference temperature. The ambient temperature in the simulation is 30 ° C.

Temperature rise reduction rate = (reference temperature-temperature at measurement position) / reference temperature

As shown in FIG. 6, the temperature rise reduction rate increases monotonically as the slit length increases. When the slit length is 0.5 × a, the temperature rise reduction rate is 3.9%, and when the slit length is 0.7 × a, the temperature rise reduction rate is 6.4. %. Therefore, when it is desired to obtain a temperature rise reduction rate of 5% or more, the length of the slit portion 34 is 0.7 times or more the length (width) of the light emitting portion 20 in the longitudinal direction of the slit portion 34. good.

When the slit lengths are 1.0 × a, 2.0 × a, 4.0 × a, and 8.0 × a, the temperature increase reduction rates are 10.3%, 20.6%, and 32. It is 8% and 43.1%. When it is desired to obtain a remarkable temperature increase reduction rate, the length of the slit portion 34 may be four times or more the length of the light emitting portion 20 in the longitudinal direction of the slit portion 34. The slit length is shorter than the length of the bottom plate 31 (for example, the diameter of the bottom plate 31) in the longitudinal direction of the slit portion 34.

Even when a seal member having a thermal conductivity lower than that of the housing 30 is sandwiched between the slit portions 34, a heat insulating effect almost the same as when the slit portion 34 is opened can be obtained. Therefore, if the seal member is sandwiched between the slit portions 34, it is possible to suppress the deterioration of the airtightness caused by the provision of the slit portion 34 while ensuring the heat insulating property between the light emitting portion 20 and the storage battery 40.

[Modification example 1 of slit portion]
The slit portion 34 is a straight line, but the slit portion 34 may be a bent straight line. That is, the edge portion of the bottom plate 31 forming the slit portion 34 may be bent. 7 to 11 are views showing the shape of the bent slit portion.

7 to 9 are views showing a linear slit portion bent toward the storage battery 40 side. The slit portions shown in FIGS. 7 to 9 have a shape in which the linear slit portion 34 is symmetrically bent toward the storage battery 40 side so as to surround the storage battery 40.

For example, the slit portion 34a shown in FIG. 7 has a U-shape (bracket shape) that expands toward the storage battery 40 side. That is, the edge portion of the bottom plate 31 forming the slit portion 34a is bent in a U shape that expands toward the storage battery 40 side. The slit portion 34b shown in FIG. 8 has a U shape that follows the shape (outer shape) of the storage battery 40. That is, the edge portion of the bottom plate 31 forming the slit portion 34b is U-shaped along the shape of the storage battery 40. The slit portion 34c shown in FIG. 9 has a U-shape that narrows toward the storage battery 40 side. That is, the edge portion of the bottom plate 31 forming the slit portion 34c is U-shaped along the shape of the storage battery 40.

10 and 11 are views showing a linear slit portion bent toward the light emitting portion 20 (convex portion 33) side. The slit portions shown in FIGS. 10 and 11 have a shape in which the linear slit portion 34 is symmetrically bent toward the light emitting portion 20 side so as to surround the light emitting portion 20.

For example, the slit portion 34d shown in FIG. 10 has a U-shape (bracket shape) that expands toward the light emitting portion 20 side. That is, the edge portion of the bottom plate 31 forming the slit portion 34d is bent in a U shape that widens toward the light emitting portion 20 side. The slit portion 34e shown in FIG. 11 has a U shape that follows the shape (outer shape) of the light emitting portion 20. That is, the edge portion of the bottom plate 31 forming the slit portion 34e is bent in a U shape along the shape of the light emitting portion 20.

As described above, if the slit portion has an arbitrarily bent shape, the heat insulating property between the light emitting portion 20 and the storage battery 40 can be adjusted.

For example, when the three types of the slit portion 34, the slit portion 34a, and the slit portion 34b are compared, the following temperature relationship can be obtained. The simulated temperature of the light emitting unit 20 is highest when the slit portion 34 is provided, then higher when the slit portion 34a is provided, and lowest when the slit portion 34b is provided. The simulated temperature of the storage battery 40 is highest when the slit portion 34b is provided, then higher when the slit portion 34a is provided, and lowest when the slit portion 34 is provided.

As described above, according to the slit portion bent toward the storage battery 40 side, the temperature of the light emitting portion 20 can be slightly lowered while ensuring the heat insulating property between the light emitting unit 20 and the storage battery 40.

Further, the slit portion 34 may have an arc shape. 12 and 13 are views showing an arc-shaped slit portion. The slit portion 34f shown in FIG. 12 has an arc shape whose center is located on the storage battery 40 side of the slit portion 34f. The slit portion 34g shown in FIG. 13 has an arc shape whose center is located on the light emitting portion 20 side of the slit portion 34g.

[Modification example 2 of slit portion]
The slit portion 34 and the like are one opening (through hole), but the slit portion 34 may be composed of a plurality of holes provided in the bottom plate 31. 14 and 15 are views showing an example of a slit portion composed of a plurality of holes.

The slit portion 34h shown in FIG. 14 is formed by arranging a plurality of through holes having a circular plan view shape in a long shape. Further, the slit portion 34i shown in FIG. 15 is formed by arranging a plurality of through holes having a rectangular shape in a plan view in a long shape.

As shown in FIGS. 14 and 15, the plurality of holes may be arranged in a plurality of rows along the longitudinal direction of the slit portion, or may be arranged in one row along the longitudinal direction of the slit portion. You may.

[Modification example 3 of slit portion]
The slit portion 34 and the like do not separate the bottom plate 31 into two, but the bottom plate 31 may be separated into two by the slit portion 34 and the like. FIG. 16 is a diagram showing an example of a slit portion that separates the bottom plate 31 into two.

The slit portion 34j shown in FIG. 16 has a linear shape extending in the X-axis direction, and separates the bottom plate 31 into two. The slit portion 34j may be closed by, for example, a second seal member sandwiched between the slit portions 34j.

The side wall 32 may also be separated into two with a gap corresponding to the bottom plate 31. In this case as well, the seal member may be sandwiched in the gap between the side walls 32.

Further, the shape of the slit portion that separates the bottom plate 31 into two is not limited to the shape of the slit portion 34j. The shape of the slit portion that separates the bottom plate 31 into two may be a shape such as the slit portions 34a to 34g.

[supplement]
In the lighting device 10, when the main surface of the bottom plate 31 is divided into two regions, a first region and a second region, by a slit portion or a virtual line extended along the slit portion, the first region is formed. The storage battery 40 may be placed, and the light emitting unit 20 may be directly or indirectly placed in the second region. Here, the meaning that the light emitting unit 20 is indirectly mounted means that the light emitting unit 20 is placed via the other member, for example, when another member is interposed between the light emitting unit 20 and the bottom plate 31. Means that. Other members include, for example, a convex portion 33 that is separate from the bottom plate 31. The first region may be a region narrower than the second region or a region wider than the second region. In the above embodiment, the power supply circuit 50 is mounted in the second region.

Further, the slit portion of the above embodiment is an example of an opening portion. An opening having a shape different from the slit shape may be provided at a position of the bottom plate 31 between the first region and the second region.

[Effects, etc.]
As described above, in the lighting device 10, the light emitting unit 20, the storage battery 40 that supplies electric power to the light emitting unit 20, the first region on which the storage battery 40 is placed, and the light emitting unit 20 are directly or indirectly mounted. It is provided with a bottom plate 31 having a second region on which the device is placed. A slit portion 34 is provided at a position on the bottom plate 31 between the first region and the second region. The slit portion 34 is an example of an opening.

By providing the slit portion 34 in the bottom plate 31 in this way, it is possible to suppress the heat generated by the light emitting portion 20 from being transferred to the storage battery 40. In other words, the lighting device 10 in which the heat generated by the light emitting unit 20 is not easily transferred to the storage battery 40 is realized.

Further, the slit portion 34 is linear, and the length of the slit portion 34 may be 0.7 times or more the length of the light emitting portion 20 in the longitudinal direction of the slit portion 34.

As a result, a certain heat insulating effect (temperature rise reduction rate of 5% or more in the above embodiment) can be obtained.

Further, the edge portion forming the slit portion 34 may be bent.

As a result, if the design of the bending method is changed, the heat insulating property of the light emitting unit 20 and the storage battery 40 can be adjusted.

Further, the edge portion forming the slit portion 34, such as the slit portion 34a, the slit portion 34b, and the slit portion 34c, may be bent toward the storage battery 40 side.

As a result, the temperature of the light emitting unit 20 can be lowered while ensuring the heat insulating property between the light emitting unit 20 and the storage battery 40.

Further, the edge portions forming the slit portion 34, such as the slit portion 34a, the slit portion 34b, the slit portion 34c, the slit portion 34d, and the slit portion 34e, may be bent at a plurality of positions.

As a result, if the design of the bending method is changed, the heat insulating property of the light emitting unit 20 and the storage battery 40 can be adjusted.

Further, like the slit portion 34f and the slit portion 34g, the slit portion 34 may have an arc shape.

As a result, the arc-shaped slit portion 34 can suppress the heat generated by the light emitting portion 20 from being transferred to the storage battery 40.

Further, like the slit portion 34h and the slit portion 34i, the slit portion 34 may be composed of a plurality of holes provided in the bottom plate 31.

As a result, the slit portion 34 can be realized by a plurality of holes.

Further, the lighting device 10 is a power supply circuit 50 mounted in the second region of the bottom plate 31, and converts AC power supplied from the outside of the lighting device 10 into DC power to the light emitting unit 20. A power supply circuit 50 to be supplied may be provided.

As a result, it is possible to suppress the heat generated by the power supply circuit 50 from being transferred to the storage battery 40. In other words, the lighting device 10 in which the heat generated by the power supply circuit 50 is not easily transferred to the storage battery 40 is realized.

Further, a convex portion 33 on which the light emitting portion 20 is placed may be provided in the second region of the bottom plate 31.

As a result, the bottom plate 31 can support the light emitting portion 20 by the convex portion 33.

Further, the convex portion 33 may be provided at the central portion of the bottom plate 31.

As a result, the light emitting unit 20 can be arranged in the central portion of the lighting device 10.

Further, the lighting device 10 further includes a light emitting portion 20, a convex portion 33, and a side wall 32 that surrounds the storage battery 40 from the side, and the bottom plate 31 and the side wall 32 accommodate the light emitting portion 20, the convex portion 33, and the storage battery 40. The housing 30 may be configured.

As a result, the heat generated by the light emitting unit 20 can be suppressed from being transferred to the storage battery 40 by the slit portion 34 provided in the bottom plate 31 formed as a part of the housing 30.

Further, the lighting device 10 further includes a transparent cover 60 attached to the side opposite to the bottom plate 31 of the housing 30, a first seal member 70 for closing the gap between the cover 60 and the housing 30, and a slit. A second seal member 80 that closes the portion 34 may be provided.

As a result, the airtightness (waterproofness and dustproofness) of the lighting device 10 can be improved. In the lighting device 10 with improved airtightness, it is difficult to release the heat of the light emitting unit 20, so that the configuration in which the slit portion 34 is provided is particularly useful.

Further, the second seal member 80 may close the slit portion 34 by being sandwiched between the slit portions 34.

As a result, it is possible to suppress the deterioration of the airtightness caused by the slit portion 34 while ensuring the heat insulating property between the light emitting portion 20 and the storage battery 40.

Further, like the slit portion 34j, the slit portion 34 may separate the bottom plate 31 into two.

As a result, it is possible to suppress the heat generated by the light emitting unit 20 from being transferred to the storage battery 40.

(Other embodiments)
Although the lighting device according to the embodiment has been described above, the present invention is not limited to such an embodiment.

The shape of the slit portion described in the above embodiment is an example. For example, the shape of the slit portion may include both a linear portion and a curved portion.

The shape of the lighting device described in the above embodiment is an example. For example, in the above embodiment, the plan view shape of the housing is circular, but the plan view shape of the housing may be a polygon such as a rectangle.

Further, in the above embodiment, a COB type light emitting module is used as the light emitting unit, but the mode of the light emitting unit is not particularly limited. For example, an SMD type light emitting module may be used as a light emitting unit. Further, as the light emitting unit, a fluorescent tube, a metal halide lamp, a sodium lamp, a halogen lamp, a xenon lamp, a neon tube or the like may be used instead of the light emitting module using the LED chip. Further, as the light emitting unit, inorganic electroluminescence, organic electroluminescence, chemiluminescence (chemiluminescence), a semiconductor laser or the like may be used.

Although the lighting device according to one or more aspects has been described above based on the embodiment, the present invention is not limited to this embodiment. As long as the gist of the present invention is not deviated, various modifications that can be conceived by those skilled in the art are applied to the present embodiment, and a form constructed by combining components in different embodiments is also within the scope of one or more embodiments. May be included within.

10 Lighting device 20 Light emitting part 30 Housing 31 Bottom plate 32 Side wall 33 Convex part 34, 34a to 34j Slit part (opening)
40 Storage battery 50 Power supply circuit 60 Cover 70 1st seal member 80 2nd seal member

Claims (16)

Light emitting part and
A storage battery that supplies electric power to the light emitting unit,
A power supply circuit that converts AC power supplied from the outside into DC power and supplies it to the light emitting unit.
A bottom plate having a first region on which the storage battery is mounted and a second region on which the power supply circuit is mounted is provided.
A lighting device in which a slit portion is provided at a position of the bottom plate between the first region and the second region. The slit portion is linear and has a linear shape.
The lighting device according to claim 1, wherein the length of the slit portion is 0.7 times or more the length of the light emitting portion in the longitudinal direction of the slit portion. The lighting device according to claim 1 or 2, wherein the edge portion forming the slit portion is bent. The lighting device according to claim 3, wherein the edge portion forming the slit portion is bent toward the storage battery side. The lighting device according to claim 3 or 4, wherein the edge portion forming the slit portion is bent at a plurality of locations. The lighting device according to claim 1, wherein the slit portion has an arc shape. The lighting device according to any one of claims 1 to 6, wherein the slit portion is composed of a plurality of holes provided in the bottom plate. The lighting device according to any one of claims 1 to 7, wherein the light emitting unit is directly or indirectly placed in the second region of the bottom plate. The lighting device according to claim 8, wherein a convex portion on which the light emitting portion is placed is provided in the second region of the bottom plate. The lighting device according to claim 9, wherein the convex portion is provided in the central portion of the bottom plate. Further, the light emitting portion, the convex portion, and the side wall surrounding the storage battery from the side are provided.
The lighting device according to claim 9 or 10, wherein the bottom plate and the side wall constitute a housing for accommodating the light emitting portion, the convex portion, and the storage battery. Moreover,
A translucent cover attached to the opposite side of the housing to the bottom plate,
The lighting device according to claim 11, further comprising a first seal member that closes a gap between the cover and the housing. The lighting device according to claim 1, further comprising a second seal member that closes the slit portion. The lighting device according to claim 13, wherein the second seal member closes the slit portion by being sandwiched between the slit portions. The lighting device according to any one of claims 1 to 14, wherein the slit portion separates the bottom plate into two. The lighting device according to any one of claims 1 to 15, wherein the power supply circuit includes a charging circuit for charging the storage battery.

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