JP2011129452A - Lighting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a portable lighting device with a solar cell panel obtaining a good heat discharging property and also suppressing the occurrence of unevenness in lighting even when a device body is made thin. <P>SOLUTION: The portable lighting device 1 includes a device body 10, the solar cell panel 20 arranged on a front surface of the device body 10, an accumulation cell 40 and a lighting unit 50 which are stored in the device body 10, and a chassis 10b. The lighting unit 50 includes a printed circuit board 51 and an LED52 and is integrated to the chassis 10b. The chassis 10b includes a flat plate type discharging section 11 that is positioned in between the solar cell panel 20 and the lighting unit 50. The printed circuit board 51 is brought into heat contact with the heat sink 11 by being brought into close contact with one of the main surfaces of the heat sink 11 through a heat conductive member and the solar cell panel 20 is fixed to the chassis 10b by being adhered to another main surface of the heat sink 11 through an adhering layer. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an illuminating device including a solar cell panel, and more particularly to a portable illuminating device configured to be portable by including a solar cell panel.

  Conventionally, as a portable illuminating device provided with a solar cell panel, there is one disclosed in, for example, Utility Model Registration No. 3103994 (Patent Document 1). The portable lighting device disclosed in Patent Document 1 includes a solar cell panel and LED (Light-Emitting Diode) lamps on the front and back of a trunk-shaped device main body, and a storage battery inside the device main body. A portable holder is provided by attaching a hand holder or shoulder to the apparatus body. In the portable lighting device disclosed in Patent Literature 1, electric power is stored in the storage battery by receiving sunlight with a solar battery panel, and the electric power stored in the storage battery is supplied to the LED lighting lamp. The LED lighting works to illuminate the surroundings.

  However, the portable illuminating device disclosed in Patent Document 1 is considered to have been basically intended to be used by being placed on the floor surface because the main body of the device is trunk-shaped and large. It is done. Therefore, the function as an illuminating device is still insufficient, and it is not configured to sufficiently illuminate the vicinity from a high place. In addition, Patent Document 1 discloses a usage mode in which the LED illumination lamp is detached from the apparatus main body, and in that case, the apparatus main body and the LED illumination lamp are connected by a cord. However, it is not always easy to handle.

  In recent years, it has become possible to make the apparatus main body smaller and lighter with the improvement of the performance of the solar cell panel and the performance of the storage battery. Here, in order to improve the handleability of the portable illumination device, it is essential to reduce the thickness of the device body. That is, if the apparatus main body can be configured to be thin, not only will it be easier to carry, but it will also be very convenient when illuminating the vicinity from a high place.

Utility Model Registration No. 3103994

  However, when considering reducing the thickness of the main body of the portable lighting device, it is necessary to solve the following two problems.

  First, when the device main body is thinned in the portable lighting device, the heat generated by the operation of the LED is not smoothly dissipated as the space inside the device main body is narrowed, and the device main body There arises a problem that it becomes easy to stay inside. When this problem occurs, the life of the LED is shortened as a result, and it becomes difficult to ensure a long product life. In order to solve the problem, it is conceivable to reduce the amount of heat generated by the LED by suppressing the amount of current applied to the LED. In such a configuration, a specified amount of current is applied to the LED. As a result, the illumination capability itself as the illumination device is reduced.

  Secondly, when the apparatus main body is thinned in the portable illumination device, there is a problem that unevenness occurs in the illumination emitted from the apparatus main body. That is, in order to be able to obtain a uniform irradiation amount over a wider range using an LED that is a point light source, the LEDs are arranged in an array, and in the emission direction of the LEDs arranged in the array. Although it is necessary to dispose the diffusion plate at a predetermined distance, when the device main body is thinned, a sufficient distance between the LED and the diffusion plate cannot be secured, resulting in uneven illumination. It will end up. In order to solve the problem, it is conceivable to arrange the LEDs more densely or to narrow the distance between the solar cell panel and the LEDs, but in any case, the heat dissipation is deteriorated. Therefore, the configuration cannot be employed as it is.

  Therefore, the present invention has been made to solve the above-described problems, and even when the apparatus main body is thinned, it is possible to obtain good heat dissipation characteristics and suppress the occurrence of uneven illumination. It aims at providing the illuminating device provided with the battery panel.

  The illuminating device based on this invention is equipped with the apparatus main body, the solar cell panel, the storage battery, the illumination unit, and the chassis. The device body has a front surface and a back surface, and the solar cell panel is disposed on the front surface of the device body. The said storage battery is accommodated in the said apparatus main body, and stores the electric power generated with the said solar cell panel. The illumination unit is housed in the apparatus main body, emits light when power is supplied from the storage battery, and irradiates light from the back surface of the apparatus main body toward the outside of the apparatus main body. The lighting unit is assembled to the chassis. Here, the illumination unit includes a light source and a support member that supports the light source, and the chassis includes a flat plate-like heat radiation portion positioned between the solar cell panel and the illumination unit. Yes. The support member is in thermal contact with the heat dissipating part by being in close contact with one main surface of the heat dissipating part via a heat conducting member, and the solar cell panel is the other of the heat dissipating part. It is fixed to the chassis by being adhered to the main surface of the above through an adhesive layer.

  In the lighting device according to the present invention, the support member is assembled to the chassis by being fixed by fastening means with the heat conducting member interposed between the support member and the chassis. Is preferred.

  In the lighting device according to the present invention, the heat conducting member may have an insulating property, and in that case, a metal pattern is formed on a main surface of the supporting member facing the chassis. It is preferable that the pattern is in contact with the heat conducting member.

  In the illuminating device based on the said invention, it is preferable that the said heat conductive member consists of a sheet-like member which has high heat conductivity.

  In the illuminating device based on the said invention, it is preferable that the said heat conductive member consists of grease which has high heat conductivity.

  In the lighting device according to the present invention, the chassis is preferably made of a metal member.

  In the lighting device according to the present invention, the light source is preferably an LED, and in that case, the support member is preferably a printed wiring board.

  In the lighting device according to the present invention, it is preferable that the heat dissipating unit has a function of dissipating heat generated in the lighting unit and a function of reinforcing the solar cell panel.

  ADVANTAGE OF THE INVENTION According to this invention, it can be set as the illuminating device provided with the solar cell panel which can acquire a favorable heat dissipation characteristic, and can also suppress generation | occurrence | production of illumination nonuniformity, even when an apparatus main body is thinned.

It is the front view and right view of the portable illuminating device in embodiment of this invention. It is a rear view of the portable illuminating device in embodiment of this invention. It is a schematic cross section of the portable illuminating device in embodiment of this invention. It is a figure which shows the functional block of the portable illuminating device in embodiment of this invention. It is a principal part expanded sectional view of the portable illuminating device in embodiment of this invention. It is a schematic diagram which shows the assembly | attachment procedure of the portable illuminating device in embodiment of this invention. It is a schematic diagram which shows the assembly | attachment procedure of the portable illuminating device in embodiment of this invention.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. In addition, the portable lighting device in the embodiment described below is intended to be charged by receiving sunlight in the daytime and used as a lighting device indoors or outdoors at night. It is configured not only to be used for leisure and disasters, but also to be used for construction sites and construction sites, daily use at home, and the like.

  1 and 2 are views showing the external structure of a portable lighting device according to an embodiment of the present invention. FIG. 1 (A) is a front view, FIG. 1 (B) is a right side view, and FIG. FIG. FIG. 3 is a diagram showing the internal structure of the portable illumination device in the present embodiment, and is a schematic cross-sectional view taken along the line III-III shown in FIG. First, with reference to these FIG. 1 thru | or FIG. 3, the structure of the portable illuminating device in this Embodiment is demonstrated.

  As shown in FIGS. 1 to 3, the portable lighting device 1 according to the present embodiment includes a device main body 10 formed in a box shape. The apparatus main body 10 is sufficiently reduced in size, thickness, and weight so that it can be easily carried. The device body 10 is preferably smaller, thinner and lighter, but from the viewpoint of performance and ease of carrying, the outer shape is approximately about 25 cm to 30 cm in height and about 35 cm to 40 cm in width. The depth is about 5 cm to 10 cm, and the weight is about 2.5 to 3.0 kg.

  The apparatus main body 10 includes a frame 10a that is configured in a frame shape to form an upper surface, a lower surface, a right side surface, and a left side surface of the apparatus main body 10, and a chassis 10b and a rotating member 12 attached to the frame 10a. It is out. Among these, it is preferable that the frame 10a and the rotating member 12 are constituted by relatively lightweight members having excellent weather resistance and rigidity. From this point of view, the frame 10a and the rotating member 12 are made of a metal member such as an aluminum alloy or a stainless alloy, or a resin member such as acrylonitrile butadiene styrene (ABS). On the other hand, the chassis 10b is preferably made of a metal member such as an aluminum alloy or a stainless alloy, for example, from the viewpoint of heat dissipation described later.

  The rotating member 12 is rotatably attached to the frame 10 a by a pair of hinges 13. More specifically, each of the pair of hinges 13 is positioned at a substantially central portion of the left and right side surfaces of the apparatus main body 10, and the end of the rotating member 12 is rotatably supported at this portion. As a result, the rotation axis of the rotation member 12 is arranged in parallel with the front surface of the apparatus body 10, and the rotation member 12 is directed in the directions of arrows A1 and A2 as shown in FIG. Thus, it rotates around the apparatus main body 10. Note that the rotation member 12 is preferably configured to be locked at a predetermined position or an arbitrary position within the rotation range.

  The chassis 10b is formed into a predetermined shape by, for example, pressing a flat plate member made of metal, and includes a heat radiating portion 11 in a part thereof. The heat dissipating part 11 is located between a solar cell panel 20 and an illumination unit 50, which will be described later, and is a part for efficiently dissipating heat mainly generated by the illumination unit 50, and a fragile solar cell. It is also a part for reinforcing panel 20. The chassis 10b is fixed to the frame 10a by, for example, welding or screwing.

  A solar cell panel 20 that generates power by receiving sunlight is disposed on the front surface of the apparatus body 10. The solar cell panel 20 mainly includes a solar cell 21 including a photoelectric conversion unit and a translucent substrate 22 that is located in front of the solar cell 21 and covers the solar cell 21. Preferably, as the solar cell 21, a silicon solar cell, a compound solar cell, or the like of a single crystal type, a polycrystalline type, or an amorphous type is used. Here, as the solar cell 21, you may be comprised with the solar cell integrated body by which a several photovoltaic cell is electrically connected. The translucent substrate 22 is provided from the viewpoint of preventing the solar cell 21 from being damaged, and acrylonitrile ethylene styrene (AES) and acrylonitrile butadiene styrene are excellent in light transmittance, weather resistance, impact resistance, water resistance, and the like. (ABS), polycarbonate (PC), etc. are preferable. The thickness of the translucent substrate 22 is preferably 1 mm or more and 5 mm or less from the viewpoint of strength and light transmittance.

  The solar cell panel 20 is fixed to the frame 10a and the chassis 10b so as to cover the front surface of the chassis 10b. Here, the solar cell panel 20 is disposed so as to face the heat radiating part 11 of the chassis 10 b described above, and is joined to the heat radiating part 11. For fixing the solar cell panel 20 to the frame 10a, sticking, bonding, fitting, screwing, or the like is preferably used. The details of the structure for joining the solar cell panel 20 to the chassis 10b will be described later.

  On the other hand, on the back surface of the apparatus main body 10, a cover lens 14 is disposed as a diffusion plate that equalizes the radiation intensity of light emitted from the illumination unit 50 described later. More specifically, the cover lens 14 is disposed at a distance from the rear surface of the chassis 10b, and is exposed on the back surface of the apparatus main body 10 by being fixed to the frame 10a. In addition, as the cover lens 14, it is preferable from the viewpoint of weight reduction to use the injection molded product which used the translucent resin material as a raw material. Further, for fixing the cover lens 14 to the frame 10a, adhesion, fitting, screwing or the like is preferably used.

  In the space inside the apparatus body 10, there are a storage battery 40 that stores the power generated by the solar battery panel 20, a lighting unit 50 that emits light when power is supplied from the storage battery 40, and the portable lighting device 1. A control unit 30 including a control unit 31 (see FIG. 4) that controls the whole is disposed.

  The control unit 30 is disposed in the upper part of the space inside the apparatus main body 10, and is fixed to the upper part of the chassis 10b by, for example, screwing or the like. The control unit 30 includes a box-shaped case and a printed wiring board covered with the box-shaped case, and the control unit 31 described above and various circuits 32 and 33 described later are included in the printed wiring board. Is provided.

  The storage battery 40 is disposed in the lower part of the space inside the apparatus main body 10 and is fixed to the lower part of the chassis 10b by, for example, screwing or the like. As the storage battery 40, for example, a lithium ion battery, a nickel metal hydride battery, a nickel cadmium battery, a lead battery, or the like can be used.

  The lighting unit 50 is disposed in a substantially central portion of the space inside the apparatus main body 10 and is assembled to the chassis 10b. The illumination unit 50 includes a printed wiring board 51 as a support member and an LED 52 as a light source mounted on the surface of the printed wiring board 51. As the printed wiring board 51, a flat plate made of an epoxy resin containing glass fibers (so-called glass epoxy substrate) is preferably used. As the LED 52, a surface-mount type LED including an LED element that is a semiconductor light emitting element, a translucent sealing resin that seals the LED element, and an electrode that is electrically connected to an external electrode is suitable. Used for A plurality of LEDs 52 are mounted, for example, in an array on the surface of the printed wiring board 51 described above.

  Here, the illumination unit 50 is disposed to face the heat radiating part 11 of the chassis 10b described above, and is assembled to the heat radiating part 11 so as to be in thermal contact with the heat radiating part 11. Specifically, the illumination unit 50 is fixed to the chassis 10b by fastening means (not shown) so that the main surface on which the LED 52 of the printed wiring board 51 is mounted faces the cover lens 14 side. The details of the assembly structure of the illumination unit 50 to the chassis 10b will be described later.

  The light emitted from the LED 52 is irradiated toward the outside of the apparatus main body 10 through the cover lens 14 disposed on the back surface of the apparatus main body 10. Here, as described above, since the plurality of LEDs 52 are arranged in an array on the surface of the printed wiring board 51, the illumination unit 50 functions as a surface light source as a whole, and its illumination range. Will be secured in a wide range. As the LED 52, a white light emitting diode is preferably used.

  On the right side surface of the apparatus main body 10, an operation unit 15 that enables the operation of the illumination unit 50 to be switched and a display unit 16 that displays an operation state of the portable illumination device 1 and the like are provided. The operation unit 15 is configured by, for example, a push button, and the display unit 16 is configured by, for example, an LED. The display unit 16 may include a charge state display unit for displaying whether or not the portable lighting device 1 is in a charged state and a remaining amount display unit for displaying the state of the remaining amount of the storage battery 40. preferable.

  A light shielding sheet may be disposed in the space inside the apparatus main body 10. The light-shielding sheet is preferably disposed in front of the cover lens 14 and behind the chassis 10b, and is disposed in a portion excluding the back side of the illumination unit 50 and excluding a portion where the illumination unit 50 is provided. It is for blinding so that the internal structure of the main body 10 cannot be seen through the cover lens 14.

  FIG. 4 is a diagram illustrating a functional block configuration of the portable illumination device according to the present embodiment. Next, with reference to this FIG. 4, the structure of the functional block of the portable illuminating device in this Embodiment is demonstrated.

  As shown in FIG. 4, the portable lighting device 1 according to the present embodiment includes a charging circuit 32 in addition to the solar cell panel 20, the storage battery 40, the lighting unit 50, the control unit 31, the operation unit 15, and the display unit 16 described above. And a discharge circuit 33.

  The charging circuit 32 is a circuit for charging the storage battery 40 with the electric power generated by the solar battery panel 20 based on a command from the control unit 31. More specifically, the charging circuit 32 charges the storage battery 40 by sending the generated power to the storage battery 40 when the generated voltage of the solar panel 20 reaches a certain value or more. When the generated voltage becomes less than the predetermined value, charging of the storage battery 40 is stopped. In addition, the charging circuit 32 stops charging the storage battery 40 to prevent overcharging of the storage battery 40 when the storage battery 40 is fully charged, and charging the storage battery 40 when the voltage of the storage battery 40 becomes a predetermined value or less. Release the stop and resume charging. In addition, the charging circuit 32 is an overcurrent protection circuit that prevents the electric power sent from the solar battery panel 20 to the storage battery 40 from being in an overcurrent state, and a reverse current that prevents a reverse current flow from the storage battery 40 to the solar battery panel 20. A prevention circuit or the like may be included.

  The discharge circuit 33 is a circuit for supplying the power stored in the storage battery 40 to the lighting unit 50 based on a command from the control unit 31. More specifically, the discharge circuit 33 supplies the electric power stored in the storage battery 40 to the lighting unit 50 based on a command from the control unit 31 when the voltage of the storage battery 40 is equal to or higher than a certain value. When it is less than a certain value, the supply of power from the storage battery 40 to the lighting unit 50 is stopped to prevent overdischarge.

  The operation unit 15 is a part for switching the operation of the lighting unit 50 as described above. Specifically, when the user operates the operation unit 15, the operation unit 15 outputs the operation unit 15 to the control unit 31. The display unit 16 is a part for displaying whether or not the portable lighting device 1 is in a charged state and the remaining amount of the storage battery 40 as described above. For example, the portable lighting device 1 is in a charged state. Whether the battery 40 is lit or not lit, and the remaining amount of the storage battery 40 is displayed by the number of lights corresponding to the remaining amount.

  Moreover, the control part 31 is a site | part which controls the whole portable illuminating device 1 as mentioned above, the information of the electric power generation voltage from the solar cell panel 20, the information of the residual amount of the electric power stored from the storage battery 40, Based on the input of information on the presence / absence of the user's operation from the operation unit 15, the operation of the charging circuit 32, the discharging circuit 33, and the lighting unit 50 is controlled.

  FIG. 5 is a view showing an assembly structure in the vicinity of the heat radiating portion of the portable lighting device according to the present embodiment, and is an enlarged cross-sectional view of a main part of a region V shown in FIG. 6 and 7 are schematic views showing an example of a specific assembling procedure for realizing the assembling structure in the vicinity of the heat dissipating section shown in FIG. Next, with reference to these FIG. 5 thru | or FIG. 7, the assembly structure and assembly procedure of the heat radiation part vicinity of the portable illuminating device in this Embodiment are explained in full detail.

  As shown in FIG. 5, the heat radiating portion 11 provided at a predetermined position of the chassis 10b has a flat plate shape, and illumination is performed on one main surface thereof via a heat conductive layer 62 as a heat conductive member. The printed wiring board 51 of the unit 50 is assembled so as to be in thermal contact, and the solar cell panel 20 is bonded to the other main surface via an adhesive layer 61.

  More specifically, the heat conductive layer 62 is located on one main surface of the heat radiating portion 11, and the printed wiring board 51 of the lighting unit 50 is located on the heat conductive layer 62. The heat conductive layer 62 is for transferring the heat generated in the lighting unit 50 to the heat radiating portion 11 and is made of, for example, a sheet-like member or grease having high heat conductivity. Here, the sheet-like member having high thermal conductivity preferably includes, for example, a sheet made of polyphenylene sulfide resin, and the grease having high thermal conductivity preferably includes, for example, particles having high thermal conductivity. And silicone grease. In addition, as the printed wiring board 51, in order to make thermal conductivity favorable, it is preferable to comprise thin thickness.

  On the other hand, the adhesive layer 61 is located on the other main surface of the heat dissipation part 11, and the solar cell 21 of the solar cell panel 20 is located on the adhesive layer 61. The adhesive layer 61 is for fixing the solar cell panel 20 to the heat radiating part 11, and preferably includes, for example, an epoxy resin adhesive or an acrylic resin adhesive. Here, the heat radiating part 11 and the adhesive layer 61 mainly correspond to a reinforcing member for reinforcing the strength of the fragile solar cell panel 20, and the solar cell panel 20 is fixed to the heat radiating part 11 via the adhesive layer 61. This increases the mechanical strength of the solar cell panel 20. In addition, when the epoxy resin-based adhesive or acrylic resin-based adhesive described above is used as the adhesive, the adhesive is relatively excellent in thermal conductivity compared to other adhesives. The heat generated in the battery panel 20 can be efficiently transferred to the heat radiating unit 11, and as a result, the heat generated in the solar cell panel 20 can be efficiently radiated in the heat radiating unit 11. Become. Further, the solar cell panel 20 includes a solar cell 21 and a translucent substrate 22 described above, and a filling layer 23 for adhering them by being filled between them. As the filling layer 23, a thermoplastic synthetic resin material mainly composed of ethylene vinyl acetate copolymer (EVA), polyvinyl butyral (PVB), or the like is preferably used.

  Generally, a fluorine resin film such as a polyvinyl fluoride film is provided on the rear surface (non-light receiving surface) opposite to the front surface (light receiving surface) of the solar cell 21 via a sealing resin such as an ethylene / vinyl acetate copolymer. In many cases, a protective film made of an organic film such as polyethylene terephthalate (PET) film or the like is provided, and in that case, the protective film and the heat radiating portion 11 are bonded via the adhesive layer 61. become.

  Thereby, in the portable lighting device 1 according to the present embodiment, the heat generated in the lighting unit 50 (that is, the heat generated by driving the LED 52) is transferred to the heat radiating portion 11 of the chassis 10b via the heat conductive layer 62. The solar cell panel 20 is fixed to the heat radiating part 11 of the chassis 10b via the adhesive layer 61, and the strength of the solar cell panel 20 is increased. In particular, when a solar cell panel in which a crystalline solar cell is incorporated is used, heat generated in the solar cell panel 20 (that is, heat generated by receiving sunlight) passes through the adhesive layer 61. By transferring heat to the heat radiating part 11 of the chassis 10b, the solar cell panel 20 is cooled, and as a result, the effect of increasing the power generation efficiency is also obtained. Therefore, the lighting unit 50 can be efficiently cooled and the fragile solar cell panel 20 can be reinforced. In addition, as above-mentioned, it is preferable that the thermal radiation part 11 is comprised with the metal members, and is comprised especially with the aluminum alloy from a viewpoint of heat dissipation, reinforcement (rigidity), and weight reduction. It is preferable.

  Here, it is preferable to fix the lighting unit 50 to the chassis 10b using screwing or the like. In that case, the printed wiring board 51 and the chassis 10b are brought into close contact with each other through a sheet-like member or grease as the heat conductive layer 62 by providing a screw-fastening portion at the peripheral edge of the printed wiring board 51. State. Therefore, it is possible to reliably improve heat dissipation by performing torque management or the like at the time of screwing.

  In order to realize the above assembly structure, first, as shown in FIG. 6, an adhesive 61 is applied to a predetermined position on the rear surface of the solar cell panel 20, and the heat radiating portion 11 of the chassis 10 b is pressed against the adhesive 61. The adhesive 61 is cured while maintaining the pressed state. Thereafter, as shown in FIG. 7, the sheet-like member as the heat conductive layer 62 is placed on the heat radiating portion of the chassis 10b, the lighting unit 50 is pressed from above, and the fastening means described above while maintaining the state. The lighting unit 50 is fixed to the chassis 10b by (not shown). Thereby, the sheet-like member as the heat conductive layer 62 is appropriately compressed and comes into close contact with the printed wiring board 51 and the heat radiating portion 11 of the illumination unit 50, and the assembly structure shown in FIG. 5 is realized. become.

  In the above description, the case where a sheet-like member is used as the heat conductive layer 62 has been described. However, when grease is used as the heat conductive layer 62, the heat radiating portion of the chassis 10b is subjected to the procedure shown in FIG. 11. Apply grease to the exposed surface of 11, and press the lighting unit 50 onto the heat dissipating part 11 to which the grease has been applied. The lighting unit 50 is attached to the chassis 10b by the fastening means (not shown) while maintaining the state. Secure to. At that time, the grease is made to spread over the entire surface of the heat radiating portion 11 so that the thickness of the heat conductive layer 62 becomes uniform.

  By using the portable lighting device 1 in the present embodiment described above, the chassis 10b disposed inside the device main body 10 has a function as a heat radiating portion of the lighting unit 50 and a function of reinforcing the solar cell panel 20. In addition, in some cases, it is possible to provide a function as a heat radiating portion of the solar cell panel 20. Therefore, it is necessary to separately provide a chassis for assembling the lighting unit 50 and a chassis for reinforcing the solar cell panel 20, and the apparatus main body 10 can be thinned. Moreover, since it becomes possible to arrange | position the illumination unit 50 close to the solar cell panel 20, after aiming at thickness reduction of the apparatus main body 10, between the illumination unit 50 and the cover lens 14 as a diffusion plate, it is. A sufficient distance can be secured. Therefore, even when the apparatus main body 10 is thinned, it is possible to obtain an illuminating device including a solar cell panel that can obtain good heat dissipation characteristics and can suppress the occurrence of uneven illumination.

  In order to more efficiently transfer the heat generated in the lighting unit 50 to the heat radiating portion 11, a metal pattern is formed on the main surface of the printed wiring board 51 on the side where the LEDs 52 are not mounted. Is preferred. In that case, a through-hole penetrating the printed wiring board 51 is provided, and a metal wiring pattern provided on the main surface on the side where the LED 52 is mounted and a metal provided on the main surface on the side where the LED 52 is not mounted. It is even better if it is configured to connect the manufactured pattern using the through hole. However, in that case, since it is necessary to ensure insulation between the printed wiring board 51 and the chassis 10b, the heat conduction layer 62 as the heat conduction member needs to be insulation.

  The above-described embodiments disclosed herein are illustrative in all respects and are not restrictive. The technical scope of the present invention is defined by the terms of the claims, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  DESCRIPTION OF SYMBOLS 1 Portable illumination device, 10 apparatus main body, 10a frame, 10b chassis, 11 heat radiating part, 12 rotating member, 13 hinge, 14 cover lens, 15 operation part, 16 display part, 20 solar cell panel, 21 solar cell, 22 Translucent substrate, 23 filling layer, 30 control unit, 31 control unit, 32 charging circuit, 33 discharging circuit, 40 storage battery, 50 lighting unit, 51 printed wiring board, 52 LED, 61 adhesive layer (adhesive), 62 heat Conductive layer.

Claims (8)

An apparatus body having a front surface and a back surface;
A solar cell panel disposed on the front surface of the apparatus body;
A storage battery that is housed in the device body and stores the electric power generated by the solar cell panel;
An illumination unit that is housed in the apparatus body, emits light when power is supplied from the storage battery, and emits light from the back surface of the apparatus body toward the outside of the apparatus body;
A chassis with the lighting unit assembled thereto,
The lighting unit includes a light source and a support member that supports the light source,
The chassis includes a flat plate-like heat dissipating part located between the solar cell panel and the lighting unit,
The support member is in thermal contact with the heat dissipating part by being in close contact with one main surface of the heat dissipating part via a heat conducting member,
The said solar cell panel is the illuminating device fixed to the said chassis by adhere | attaching on the other main surface of the said thermal radiation part via an adhesive layer.   The lighting device according to claim 1, wherein the support member is assembled to the chassis by being fixed by fastening means in a state where the heat conducting member is interposed between the support member and the chassis. The heat conducting member has an insulating property;
A metal pattern is provided on the main surface of the support member facing the chassis,
The lighting device according to claim 1, wherein the pattern is in contact with the heat conducting member.   The lighting device according to claim 1, wherein the heat conducting member is a sheet-like member having high heat conductivity.   The lighting device according to claim 1, wherein the heat conducting member is made of grease having high heat conductivity.   The lighting device according to claim 1, wherein the chassis is made of a metal member. The light source is an LED;
The lighting device according to claim 1, wherein the support member is a printed wiring board.   The lighting device according to any one of claims 1 to 7, wherein the heat radiating unit has a function of radiating heat generated in the lighting unit and a function of reinforcing the solar cell panel.

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