JP3152381U - Lighting device - Google Patents

Abstract

Provided is a high-luminance illumination device using LED elements, and more accurately and stably illuminates the direction in which the LED illuminates, and freely controls the direction of LED light and the overlapping state of multiple LED lights (light distribution state). Provided is a lighting device that can be changed. A plurality of recesses having a flat bottom surface inclined in a predetermined direction are formed on an upper surface of a heat dissipation plate, and the bottom surface of the LED element is disposed in close contact with the bottom surface in the recess through a heat dissipation spacer. To do. A thin printed board 11 is disposed at a lower position away from the heat radiating plate 3, and electrode terminals of the LED elements are connected to the printed board 11, and a number of cooling protrusions are disposed at a lower position away from the printed board 11. A cooling base 13 comprising: Then, the second heat conducting member 17 is disposed between the cooling base 13 and the heat radiation plate 3 so as to penetrate the printed circuit board 11. [Selection] Figure 2

Description

  The present invention relates to a lighting device that is suitably mounted on a vehicle as a light source for photographing, for example, in a vehicle collision test.

As one of the methods for obtaining data in a vehicle crash test, a small camera has been conventionally mounted on the vehicle, and a still picture is taken to record the situation of the impact caused to the vehicle by the collision. Although there are many techniques related to such a collision test, Patent Document 1 is given as an example.
When taking still pictures, since the shutter speed of the camera becomes high, an illumination device using a high-intensity lamp as the light source is often used as the light source. Further, when sufficient illuminance cannot be obtained even when recording as an image other than a still picture, shooting is often performed using a high-luminance illumination device.

JP 2001-147173 A

When a light bulb or an HID lamp is used as the light source of the illumination device as described above, an illumination device using an LED element is required because of its poor impact resistance.
Therefore, the applicant has proposed a lighting device with good cooling efficiency using LED elements in the idea of Utility Model Registration No. 3141766. The present application is an improvement of the previous lighting device, and more accurately and stably changes the direction in which the LED illuminates, and freely changes the direction of the LED light and the overlapping state (light distribution state) of the plurality of LED lights. Provided is a lighting device that can be used.

  As a first means for achieving the above object, a plurality of recesses having a flat bottom surface inclined in a predetermined direction are formed on an upper surface of a flat plate for heat radiation made of a heat conductive material. The bottom surface of the LED element is disposed in close contact with the bottom surface of the inside directly or via the first heat conducting member, while a thin printed board is disposed at a lower position away from the heat radiating plate. An electrode terminal extending from the LED element is connected to the substrate, and a cooling base having a large number of cooling protrusions is disposed at a lower position away from the printed circuit board, and between the cooling base and the heat radiating plate. The gist is that the second heat conducting member is disposed through the printed board.

  In the device of the above claim, the heat generated by the LED element is transmitted through the heat conducting member and radiated from the cooling base, and the light distribution state of the LED element can be freely changed and the illumination device having the same light distribution design Then, there is no individual difference in the light distribution characteristics, and the illumination direction is more accurate and stable.

The perspective view of the illuminating device of the Example of this invention. The exploded side view of the same illuminating device. The longitudinal cross-sectional view of the principal part of the same illuminating device. Sectional drawing from the AA direction in FIG. 1 (The LED element is not made into the cross section.). Explanatory drawing explaining the inclination state of the bottom face of the recessed part of the plate for thermal radiation. Explanatory drawing explaining the light distribution characteristic of the illumination of the LED element arrange | positioned at the heat radiating plate of FIG.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the lighting device of the present invention will be described below with reference to the drawings. In the following description, for convenience of description, the lower side of the drawing in FIG. 2 is the lower side, and the upper side is the upper side.
As shown in FIGS. 1 to 4, the lighting device 1 includes a housing 2 and left and right upper lids 2 a and 2 b disposed on the left and right positions on the top of the housing 2. 3 is provided. The heat radiating plate 3 is a flat plate made of an aluminum alloy having an upper surface and a back surface that are parallel to each other. As shown in FIG. 5, a total of twelve recesses 5 of 3 × 4 are formed on the upper surface side of the heat radiation plate 3. The bottom surface 5a of each recess 5 is in the direction of the arrow in the figure with respect to the upper and lower surfaces of the heat radiating plate 3 (in this embodiment, the upper and lower four rows are at 45 ° with respect to the longitudinal (lateral) direction, and the central row is 0 It is an inclined plane that falls in the direction of °. In the present embodiment, among these recesses 5, the outer six are configured at an angle of 8 ° (deep angle) with respect to the plane direction, and the inner six are configured at an angle of 4 ° (shallow angle) with respect to the plane direction. Yes. In addition, the inclination direction and inclination angle of the bottom surface 5a can be changed and designed according to the usage as appropriate.
An LED element 7 housed in an LED case 6 is disposed in each recess 5. As shown in FIGS. 3 (a) and 3 (b), an aluminum alloy heat dissipating spacer 8 is interposed between the bottom surface of the LED element 7 and the bottom surface 5a of the recess 5 as a first heat conducting member. 9 is fixed from the back side of the heat radiating plate 3. As a result, the heat of the LED element 7 is transmitted to the heat radiating plate 3 through the heat radiating spacer 8. The electrode 10 of the LED element 7 is suspended from a small through hole 16 formed from the bottom surface 5 a to the back surface of the recess 5.

A printed circuit board 11 is disposed in a lower position inside the housing 2 and away from the heat radiating plate 3. The printed circuit board 11 is a flexible rectangular thin plate member made of a composite copper-clad laminate. The printed circuit board 11 is mounted with predetermined printed wiring, chips, and the like (not shown). The printed board 11 is supported by an electrode 10 that hangs down from the LED element 7. A total of six through holes 12 in two rows are formed in the printed circuit board 11 along the longitudinal direction.
A heat sink 13 serving as a cooling base is disposed in a lower position inside the housing 2 and away from the printed circuit board 11. The heat sink 13 of the present embodiment is an integrally formed product made of an aluminum alloy including a rectangular base plate 14 and nine fins 15 as cooling projections. Each fin 15 is arranged to hang from the base plate 14 so as to be parallel to each other. A small cooling fan device (not shown) is disposed at a position on the inner surface of the housing 2 and facing one end of the heat sink 13.

Between the heat radiating plate 3 and the heat sink 13, six heat pipes 17 made of aluminum alloy are disposed as second heat conducting members. As a result, the heat of the heat radiating plate 3 is transmitted to the heat sink 13 through the heat pipe 17. The heat pipe 17 passes through the six through holes 11 formed in the printed circuit board 11 and connects the heat radiating plate 3 and the heat sink 13. It is buried in 13. The heat pipe 17 is fixed to the heat sink 13 via the heat radiating plate 3 with bolts 20.
A heat-dissipating compound as a slightly sticky filler is applied to the outer peripheral portion of the heat pipe 17 in order to lubricate and dissipate heat.
A storage battery 23 is housed in a lower position of the housing 2. An input switch 24 is disposed on the side surface of the housing 2. The illuminating device 1 configured as described above is attached to a place where it is desired to shoot in the vehicle together with a photographic device such as a CCD camera via a stay (not shown).
In the configuration as described above, the LED elements 7 are set on the heat radiating plate 3 inclined on the bottom surface 5a of the recess 5 as shown in FIG. The light will diffuse as shown in FIG. In this embodiment, the light distribution characteristics are such that the light is condensed relatively near the center and the surroundings are scattered. However, various light distribution characteristics can be provided depending on the inclination direction and the inclination angle of the bottom surface 5a.

With the configuration described above, the lighting device 1 according to the present embodiment has the following effects.
(1) Since the heat radiation spacer 8 is always in contact with the bottom surface of the LED element 7 and the heat transmitted to the heat radiation plate 3 is radiated from the heat sink 13 through the heat pipe 17, the LED element 7 emits light. Heat is suppressed, and it becomes possible to use the LED element 7 having higher brightness than in the past.
(2) Various light distribution characteristics can be created by designing the inclination and direction of the bottom surface 5a of the recess 5 according to the purpose of use, and the application of the lighting device 1 is expanded.
(3) By using the concave portion 5 that sits on the bottom surface 5a in order to diffuse the LED element 7, there can be provided the illumination device 1 having an accurate and stable light distribution characteristic in the illumination direction without individual differences. .

Note that the present invention can be modified and embodied as follows.
The above embodiment is an example. For example, the arrangement of the number of LED elements 7 can be freely changed. Further, the configuration of the housing 2 is not limited to the above.
-The structure of the heat pipe 17 or the heat sink 13 is not limited to the above. It is also possible to use materials other than those described above, such as an alloy containing copper, for the heat dissipation spacer 8, the heat pipe 17, and the heat sink 13.
Although the heat dissipation spacer 8 is prepared separately, a heat dissipation protrusion may be formed on the bottom surface 5 a of the recess 5. In short, the heat of the LED element 7 may be transmitted to the heat radiating plate 3.
The illumination device 11 can also be used when shooting as a video, in addition to shooting still photos with a CCD camera.
-The material of the board | substrate 14 is not limited above.
-In addition, it is free to implement in a mode that does not depart from the spirit of the present invention.

  DESCRIPTION OF SYMBOLS 1 ... Illuminating device, 3 ... Plate for heat dissipation, 5 ... Recessed part, 5a ... Bottom surface, 7 ... LED element, 8 ... Spacer for heat dissipation as 1st heat conductive member, 11 ... Printed circuit board, 17 ... 2nd heat conduction Heat pipe as a member, 14 ... substrate.

Claims (1)

  A plurality of recesses having a flat bottom surface inclined in a predetermined direction are formed on the top surface of a flat plate heat radiation plate made of a heat conductive material, and the bottom surface of the LED element is directly or secondly formed with respect to the bottom surface in the recess. 1. A thin printed board is placed at a lower position away from the heat radiating plate, and an electrode terminal extending from the LED element is connected to the printed board while being arranged in close contact with each other through a heat conducting member. In addition, a cooling base having a large number of cooling protrusions is disposed at a lower position away from the printed circuit board, and the second printed circuit board is inserted between the cooling base and the heat radiating plate. An illumination device characterized by being arranged.

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