JP3201489U - Portable floodlight - Google Patents

Abstract

The present invention provides a noiseless portable projector that is used for night construction or events outdoors. A printed wiring board 12 of an LED 11 is attached and fixed to the outer surface, and a plurality of heat radiating plates 10 having comb-shaped heat radiating fins 10b protruding from the inner surface are combined into a regular polygon in a plan view and a bottom view. A hollow heat radiator A, a fluorescent or milky hood attached to each heat sink forming the heat radiator so as to wrap the LED printed wiring board, and upper and lower ends of the radiator and the hood LED printed wiring board cooling that has a pair of upper and lower retaining plates 17 and 18 that are attached and fixed to the heat radiating plate of the radiator, and communicates with the hollow interior of the hood as a circular shape that can be applied together. A plurality of first air vents 17a and 18a for cooling and second air vents 17b and 18b for cooling fins communicating with the hollow interior of the radiator are radiated to a pair of upper and lower retaining plates, respectively. Opened it formed universal distributed. [Selection] Figure 2

Description

  The present invention relates to a portable projector that is used for outdoor night work and events, indoor work in the dark, and the like.

  As this type of portable projector, a balloon projector as described in Patent Document 1 is known, which is a high-intensity LED (light emitting diode) instead of a high-intensity discharge (HID) lamp. Is considered to be approximate to the present invention in that illumination is performed in all directions (360 degrees).

Japanese Patent No. 5635560

  However, in the configuration of the balloon-type projector disclosed in Patent Document 1, the air supply blower (10) for inflating the balloon (5) is indispensable. In addition to an increase in weight and the like, until the balloon (5) is inflated by the blower (10), the use cannot be started yet, so-called rising is slow.

  Furthermore, since it is necessary to continue the air flow of the blower (10) to the inside of the balloon (5) and forcibly air-cool the heat radiating plate (14) of the light source part (7), the cost for use becomes expensive and power saving. There is also a problem that noise is generated as a result of continuing to operate the blower (10) at night.

  The present invention aims to improve such problems, and in order to achieve the object, the printed wiring board of the LED is attached and fixed to the outer surface (front surface), and the inner surface (back surface) is comb-like. From a plurality of heat sinks with protruding heat radiation fins, a hollow heat sink combined with a regular polygon in plan view and bottom view,

  Fluorescent or milky white hood attached to each heat sink that forms the radiator to enclose the printed circuit board of the LED, and

  A pair of upper and lower retaining plates attached and fixed to the radiator plate of the radiator, as a circular shape with a size that allows the upper ends and the lower ends of the radiator and the hood to be covered together,

  A top cover fixed to the upper retaining plate with a fixed air gap,

  A mounting leg that is integrally suspended from the center of the lower retaining plate,

  A plurality of upper and lower pairs of the first vents for cooling the LED printed wiring board communicating with the hollow interior of the hood and the second vent holes for cooling the radiation fins communicating with the hollow interior of the radiator are arranged in pairs. It is characterized in that openings are formed in the stop plate in a radially symmetric distribution type.

  Further, in claim 2, the radiator is a regular hexagon in a plan view and a bottom view combined from a total of six heat sinks, and center screw receiving recesses are arranged on the longitudinal center line of each heat sink,

  The printed wiring board of the LED is attached and fixed by tapping screws that are screwed into the center screw receiving recesses of the respective heat sinks from the lateral direction.

  In claim 3, each heat sink forming the heat radiator is made of an aluminum extruded material having a fixed width, and side screw receiving recesses parallel to the left and right ends of the plate main body are arranged.

  A pair of upper and lower retaining plates are attached and fixed to the radiator and hood with the tapping screws screwed into the side screw receiving recesses of the respective radiator plates from above and below.

  In claim 4, each heat sink forming the heat radiator is made of an aluminum extruded material having a constant width, and side slide guide concaves parallel to the left and right ends of the plate body are arranged in a row,

  The hood of each LED printed wiring board is made of a synthetic resin extruded material having a cross-section pseudo saddle shape or kamaboko shape, and the parallel engaging ridges formed corresponding to the left and right opening edges are formed on the side slide guide ridges on the heat sink side. It is characterized by being inserted and engaged so that it can be freely inserted and removed.

  In claim 5, each heat sink forming the heat radiator is made of an extruded aluminum material having a pseudo-cross section, and a pair of left and right arc-shaped hood support flanges are extended laterally outward from a thick plate body corresponding to the bottom surface of the bowl shape. While projecting continuously and integrally,

  Side slide guide ridges parallel to the projecting tip portions of both supporting flanges are arranged in a row.

  In claim 6, as a fixed length cylinder that can be inserted and used in a retractable column such as a movable carriage or tripod, the nut can be welded to a midway height position of the cylinder,

  A presser bolt with a large decorative head that can be turned with a fingertip that can also be a hanging rod of an AC-DC converter is screwed and fastened to a nut of the mounting leg so as to be able to advance and retract from the lateral direction. To do.

  Furthermore, in claim 7, the AC-DC converter is attached and fixed inside the hollow of the radiator, and a plurality of third vent holes are distributed between adjacent ones of the radiator plates forming the radiator. It is characterized in that a cover is interposed.

  According to the said structure of Claim 1, although the hollow heat sink is combined and shape | molded from the several heat sink to the regular polygon of planar and bottom view, the printed wiring of LED on the outer surface (surface) of each heat sink While the substrate and the fluorescent or milky white hood that wraps it are attached and fixed, comb-like heat radiation fins are projected on the inner surface (back surface) of each heat radiation plate. The heat generated by the LED and its printed wiring board can be directly conducted to the inner (back side) heat dissipating fin and efficiently dissipated by the heat dissipating fin.

  In addition, the pair of retaining plates that cover the hollow radiator and the hood together from above and below includes a first vent for cooling the LED printed circuit board that communicates with the hollow interior of the hood, and a radiator. Since the second ventilation holes for cooling the heat radiation fins communicating with the hollow interior of each of the openings are scattered in a radially symmetric distribution type, air (outside air) flowing through the hollow interior of the hood from the first ventilation openings. The LED and its printed wiring board can be naturally cooled with certainty, and the comb-shaped heat radiation fins can also be naturally cooled with air (outside air) flowing from the second vent into the hollow space of the radiator. In addition, a highly efficient heat radiation effect can be obtained without the need for a blower such as a balloon-type floodlight at a low cost in use.

  In that case, if the circular retainer plate that can cover the heat sink and the hood together is attached and fixed to the heat sinks that form the heat sink from above and below, the heat sink is self-adjusted. Because it can be assembled into a regular polygon correctly, an excellent mass production effect can be obtained.

  If the structure of Claim 2 is employ | adopted, the printed wiring board of LED and its heat sink can be shape-molded in combination with the most effective regular hexagon as a fixed belt width rich in practicality, There is also an effect that the LED printed wiring board can be easily and securely attached and fixed by the tapping screw screwed into the center screw receiving recess from the lateral direction.

  Further, if the structure of claim 3 is adopted, a pair of retaining plates can be easily and securely attached and fixed by tapping screws that are screwed into the side screw receiving recesses of each radiator plate from above and below. There is an effect that an accurate regular polygon assembly state can be obtained by itself.

  If the structure of Claim 4 is employ | adopted, the hood is inserted in the side slide guide concave strip of each heat sink, and it engages | inserts and engages so that a hood is connected to each heat sink of the LED printed wiring board. It can be attached in a precise wrapping state, which helps to improve its workability.

  In that case, in particular, if the configuration of claim 5 is adopted, it can be freely inserted into and removed from the arc-shaped hood support flange that projects continuously and laterally outward from each heat sink and the side slide guide recess at the projecting tip. Since the hood having a generally bowl-shaped cross-section that is inserted and engaged has a large continuous oval cross-section as a whole, the heat radiation effect of the LED printed wiring board inside the hollow can be further improved.

  Furthermore, if the structure of claim 6 is adopted, when the mounting leg hanging from the radiator is inserted into the telescopic column such as a movable carriage or tripod, the decorative head of the presser bolt is grasped directly at the fingertip. In addition to being able to fix and maintain the insertion state of the mounting leg without using a special tool, the screw shaft part of the presser bolt can be used as a hanging rod to perform AC-DC. There is also the convenience of hanging the converter.

  On the other hand, if the structure of Claim 7 is employ | adopted, by enlarging the hollow inside of the heat sink shape | molded combining in the regular polygon by inserting and installing a connection cover between the adjacent heat sinks. In other words, the AC-DC converter attached and fixed in the hollow interior with less restrictions can be efficiently cooled by air (outside air) flowing not only to the second vent but also to the third vent. .

It is a front view of the portable floodlight according to the present invention. FIG. 2 is a sectional view taken along line 2-2 of FIG. FIG. 3 is a sectional view taken along line 3-3 in FIG. 2. FIG. 4 is an enlarged sectional view taken along line 4-4 of FIG. It is an enlarged plan view which extracts and shows the heat sink of FIG. It is a front view which extracts and shows the printed wiring board of LED. It is a top view which extracts and shows an upper retaining plate. It is a top view which extracts and shows a lower retaining plate. It is sectional drawing corresponding to FIG. 4 which shows 1st deformation | transformation embodiment of this invention. FIG. 10 is an enlarged plan view showing the heat sink of FIG. 9 extracted. It is a front view corresponding to Drawing 1 showing the 2nd modification embodiment of the present invention. FIG. 12 is an enlarged sectional view taken along line 12-12 of FIG. It is a front view which extracts and shows the connection cover of FIG. It is a slope figure which illustrates the use condition of the present invention. It is the elements on larger scale of FIG. FIG. 15 is another partially enlarged view of FIG. 14.

  Hereinafter, the specific configuration of the present invention will be described in detail with reference to the drawings. FIGS. 1 to 8 show a portable projector (LED lighting fixture) according to the basic embodiment, and FIG. It is a rectangular tubular radiator, and is formed by combining a plurality of the same heat radiating plates (10) into a regular polygon in a plan view and a bottom view as shown in FIGS. In the illustrated example, a radiator (A) is shown that is formed by combining a total of six radiator plates (10) into a regular hexagonal shape in a plan view and a bottom view, but is not limited to the regular hexagonal shape.

  Each of the radiator plates (10) forming the radiator (A) is made of an extruded aluminum material having a certain band width (W1) (for example, about 45 mm) and length (height) (L) (for example, about 360 mm). Further, comb-like parallel heat dissipating fins (10b) are continuously and integrally provided on the inner surface (rear surface) of the relatively thick plate main body (10a).

  Further, a pair of side screw receiving recesses (10c) opening inward and side slide guide recesses (10d) opening sideways are formed at the left and right ends of the plate body (10a) as shown in FIG. In other words, they are arranged in parallel as a back-to-back positional relationship, and also on the longitudinal center line of the plate body (10a) (on the vertical center line that divides the fixed band width into two equal parts) The center screw receiving recesses (10e) are lined up.

  Then, the printed wiring board (12) of the LED (light emitting diode) (11) is directed to the flat outer surface (front surface) of the plate body (10a) in each radiator plate (10) from the outside to the center on the longitudinal center line. It is attached and fixed by a plurality of tapping screws (13) screwed into the screw receiving recesses (10e).

  In this case, the printed wiring board (12) is made of an aluminum extruded material having a constant band width (W2) (for example, about 40 mm) narrower than the heat sink (10) as shown in FIG. ) A large number of LEDs (11) are mounted in a scattered distribution state in two rows. The lead wire (14) from each LED printed wiring board (12) is a hollow of the radiator (A) as a single wire bundle (wire harness) (15) in which a plurality (6 in the illustrated example) are collected. As shown in FIG. 2, it is derived downward from the inside.

  Incidentally, as an example of preferable specifications, power consumption: 240 W (40 W × 6), total luminous flux: 34,800 lm, energy consumption efficiency: 145 lm / W, irradiation direction: 360 ° horizontal direction, input voltage: DC 36 V, input Current: 6.67 A, color temperature: 5,000 K, instrument weight: 5.5 Kg, usage environment: -25 ° C to 45 ° C.

  (16) is a fluorescent or milky white hood (reflective cover) that wraps around the printed wiring board (12) of the LED (11). Extruded in a circular shape, and the left and right opening edges of a semi-circular or semicircular shape are shaped as a pair of engaging ridges (16a) corresponding to the side slide guide ridges (10d) on the heat sink (10) side. Has been.

  Then, the engaging ridge (16a) on the hood (16) side is inserted and engaged with the side slide guide groove (10d) on the heat radiating plate (10) side so as to be freely detachable from above and below. The printed wiring board (12) of LED (11) is wrapped.

  Furthermore, (17) and (18) are a pair of upper and lower retaining plates that are the same as each other, and can cover the upper ends and the lower ends of the hollow radiator (A) and the hood (16) together. It consists of a circular aluminum plate of size (diameter) (D) (for example, about 180 mm), and its upper retaining plate (17) is screwed into the side screw receiving recess (10c) on the side of each heat sink (10) from above. The lower retaining plate (18) is screwed from below into the same side screw receiving recess (10c) on each heat radiating plate (10) side while being fixedly attached to the heat radiating plate (10) by the tapping screw (19). It is also attached and fixed to the heat radiating plate (10) by a tapping screw (20).

  That is, if a pair of upper and lower retaining plates (17) and (18) are attached to the respective heat sinks (10) with the tapping screws (19) and (20) as shown in FIGS. The regular polygons (regular hexagons in the example) of the radiator (A) that is combined and molded from a plurality of (total of six in the example) are fixed and maintained without fear of losing shape. There is no possibility that the hood (16) of the LED printed circuit board (12) will come out from the side slide guide recess (10d) on the side of each heat sink (10).

  In that case, even if the hollow radiator (A) and the hood (16) are in the assembled state covered with the pair of retaining plates (17) and (18) from the top and bottom, both retaining plates ( 17) (18) includes a first vent (17a) (18a) for cooling the LED printed wiring board that communicates with the hollow interior of the hood (16) and a heat radiation that communicates with the hollow interior of the radiator (A). A plurality (6 in the example) of the second ventilation holes (17b) and (18b) for cooling the fins are each formed in a radially symmetric distribution type.

  The printed wiring board (12) of the LED (11) in a state laid on the outer surface (front surface) of each heat sink (10) forming the heat radiator (A), its both retaining plates (17) (18) Comb-like radiating fins projecting on the inner surface (rear surface) of each radiating plate (10) while being cooled by the outside air flowing from the first vents (17a) and (18a) to the hollow interior of the hood (16) (10b) is also cooled by the outside air flowing from the second vents (17b) and (18b) of the both retaining plates (17) and (18) into the hollow interior of the radiator (A), and each radiator plate (10) Heat can be efficiently radiated from both inside and outside (front and back).

  In this respect, as is apparent from FIGS. 7 and 8 in the illustrated example, the first vent holes (17a) and (18a) have a substantially elliptical opening shape, and are distributed in a positional relationship directly passing through the hollow interior of the hood (16). On the other hand, the second vent holes (17b) and (18b) are formed in an approximately isosceles trapezoidal shape, and the positional relationship (of the radiation fins) is directly connected to the combs of the radiation fins (10b) inside the hollow of the radiator (A). However, the shape of the opening and the positional relationship are not limited to those in the illustrated example.

  A dust cover / rainproof top cover (21) covering the upper retaining plate (17) from above is attached and fixed in a relational state for maintaining a constant air gap (S) (for example, about 10 mm). ing. As the top cover (21), in the illustrated example, a top plate made of a circular aluminum plate having the same size (diameter) (D) as the both retaining plates (17) and (18) is shown. In preparation for mounting and using the projector on a tripod, which will be described later, the projector can be stably placed in an inverted posture in which the flat top plate is in contact with the ground, which is useful for carrying and other handling conveniences.

  (22) is a plurality of (six in the illustrated example) spacers that maintain the ventilation gap (S), which are embodied from a cylindrical nut and correspond to each other between the adjacent heat sinks (10). It is distributed in an overall radial symmetric manner to the vicinity of the circumference where it is located. (23) and (24) are a pair of fixed screws screwed into each spacer (cylinder nut) (22) from above and below.

  On the other hand, a mounting leg (25) is suspended from the center of the lower retaining plate (18). The mounting leg (25) is a cylinder (aluminum tube) of a certain length (for example, about 100 mm), and can be removably inserted into a telescopic column (27) such as a movable carriage (not shown) or a tripod (26). It can be done.

  Reference numeral (28) denotes a nut welded at a mid-height position of the mounting leg (cylinder) (25), and a presser bolt (30) with a large-sized decorative head (29) screwed and fastened to the nut from the lateral direction. ) Is screwed by a turning operation with a fingertip, and the insertion use state of the mounting leg (25) with respect to the column (27) is fixed and maintained.

  In that case, since the presser bolt (30) with the decorative head (29) projects horizontally from the mounting leg (25), its screw shaft portion is used as a hanging rod (31) and a hanger hook ( The AC-DC converter (or LED stabilized power supply for LED) (33) can be suspended and used via 32) or the like. The specifications of the AC-DC converter (33) are input voltage: AC100V to AC240V, and power consumption: 240W.

  (34) is a waterproof connector for connecting the wiring bundle (wire harness) (15) derived from the radiator (A) and the power cord (35), and (36) is its AC-DC converter (33). Is a power plug cord extended through a separate waterproof connector (37), and the power plug (38) is used for connection to a generator, storage battery, or other power source (not shown) outside the figure. .

  Next, FIGS. 9 and 10 show a first modified embodiment of the present invention, in which each of the radiator plates (10) forming the regular polygonal radiator (A) is extruded with an aluminum extrusion having a pseudo-cross section. As a material, a pair of parallel side screw receiving recesses (10c) that open sideways are arranged on both left and right ends of a very thick plate body (10a) corresponding to the bottom surface of the bowl shape. 10a) A pair of symmetrical arc-shaped hood support flanges (10f) are projected from the left and right end portions of the left and right sides in a continuous and continuous manner, and the projecting tip portions of both support flanges (10f) are parallel to the side slide guide recesses. They are arranged as (10d).

  The hood (16) that wraps the printed wiring board (12) of the LED (11) is extruded from the same thermoplastic resin (preferably polycarbonate resin) as that of the basic embodiment into a cross-sectional pseudo-hull shape, A pair of engaging ridges (16d) formed corresponding to the right and left opening edges of the bowl shape are inserted into the side slide guide ridges (10d) on the heat radiating plate (10) side so as to be freely detachable from the vertical direction. It is combined.

  In addition, since the other structure in 1st deformation | transformation embodiment of FIG. 9, 10 is substantially the same as the said basic embodiment of FIGS. 1-8, the code | symbol same as FIG. Just fill it in and omit the detailed explanation.

  Further, FIGS. 11 to 13 show a second modified embodiment of the present invention, in which an AC-DC converter (or LED stabilized power supply for LED) (33) is used as a radiator as in the basic embodiment. (A) The holding leg (25) hanging down from the lower retaining plate (18) is not suspended from the holding bolt (30), so that it is not used and stored in the hollow space of the radiator (A). It is fixedly installed.

  The power cord (35) and the power plug cord (36) are led out from the AC-DC converter (33) to the outside of the radiator (A). A waterproof connector interposed in the middle of the appropriate length is not shown.

  The structure of each heat sink (10) that forms the heat radiator (A) and the structure of the hood (16) that wraps the printed wiring board (12) of the LED (11) are the first modified embodiment shown in FIGS. In the second modified embodiment, in order to enlarge the hollow interior of the radiator (A), a separate connecting cover (39) is provided between adjacent ones of the radiator plates (10). It is installed.

  That is, as shown in FIGS. 11 and 12, the adjacent heat sinks (10) are arranged on the parallel side screw receiving recesses (10c) arranged in the left and right ends of the plate body (10a) in each heat sink (10). The connecting cover (39) is inserted and engaged freely in the up-and-down direction so as to connect each other.

  The connecting cover (39) is made of an aluminum plate having a constant band width (W3) (for example, about 32 mm) and the same constant length (L) as the heat sink (10), and the plate surface is as shown in FIG. A plurality of third vent holes (40) are distributed in opening. The third vent (40) will open sideways.

  In that case, relief corners (41) of the tapping screws (19) (20) for attaching and fixing the retaining plates (17) (18) are provided at the corners of the connection cover (39). After the cover (39) is inserted and engaged with the side screw receiving recess (10c) on the heat sink (10) side, the tapping screws (19) and (20) are screwed into the side screw receiving recess (10c) from above and below. It goes without saying that the pair of retaining plates (17), (18) can be fixedly attached to the heat radiating plate (10).

  In addition, the top cover (21) of the second modified embodiment is bent in a shade shape unlike the top plate as in the above basic embodiment, and a plurality of support stays (42) distributed in a radial symmetry type are provided. It is attached to the upper retaining plate (17) by a fixing screw (43). The support stay (42) welded to the top cover (21) corresponds to the spacer (22) of the basic embodiment and secures a constant ventilation gap (S) with the upper retaining plate (17). doing.

  In addition, since the other structure in 2nd modified embodiment of FIGS. 11-13 is substantially the same as the said basic embodiment of FIGS. 1-8, and 1st modified embodiment of FIGS. Only the same reference numerals as in FIGS. 1 to 10 are written in ˜13, and detailed explanation thereof is omitted.

  When the portable projectors (LED lighting fixtures) of the basic embodiment and the first modified embodiment are used for road works at night and various events in the dark, even during daytime, as illustrated in FIGS. Insert the mounting leg (25) on the projector side from above into the extendable column (27) of the tripod (26) installed on the site, and fix it with the presser bolt (30). An AC-DC converter (or LED stabilized power supply for LED) (33) is suspended from a screw shaft portion (hanging rod) (31) of a bolt (30) via a hanger hook (32). The wiring bundle (wire harness) (15) led out from the radiator (A) on the projector side is connected and wired, while the generator, storage battery, and other power sources and connection wiring mounted on the movable carriage outside the figure are connected. Just do it.

  In the case of the second modified embodiment, since the AC-DC converter (33) is installed in the radiator (A), the power cord (35) and the power plug cord (36) derived therefrom are used. It is only necessary to connect to a power source such as a generator or a storage battery not shown.

  In any case, if the power plug (38) of the power plug cord (36) is plugged into a generator, storage battery, or other power source (not shown), the projector can be used immediately. Unlike the conventional balloon-type projector described at the beginning, the forced air-cooling blower does not continue to operate at night, so that the problem of generating noise can be solved particularly by connection use to a storage battery.

  The hood (16) enclosing the printed wiring board (12) of the LED (11) is extruded from a fluorescent or milky white thermoplastic resin (preferably polycarbonate resin). Durability is better than balloons made of cloth, and even though high light transmittance can be obtained, glare can be suppressed. In other words, there is an effect that can be provided as a portable projector (LED lighting apparatus) useful for outdoor work at night.

(10) · Heat sink (10a) · Plate body (10b) · Heat sink fin (10c) · Side screw receiving recess (10d) · Side slide guide recess (10e) · Center screw receiving recess (10f) · Hood support Flange (11) / LED (Light Emitting Diode)
(12) · Printed wiring board (13) (19) (20) · Tapping screw (16) · Hood (16a) · Engaging projection (17) (18) · Retaining plate (17a) (18a) · No. 1 vent (17b) (18b), 2nd vent (21), top cover (22), spacer (23) (24), fixing screw (25), mounting leg (26), tripod (27), prop (28) · Nut (29) · Cosmetic head (30) · Presser bolt (31) · Hanging rod (33) · AC-DC converter (34) (37) · Waterproof connector (36) · Power plug cord ( 39) ・ Connecting cover (40) ・ Third vent (41) ・ Relief notch (42) ・ Support stay (43) ・ Fixing screw (A) ・ Heat radiator (S) ・ Ventilation gap

Claims (7)

A hollow heatsink combined with a regular polygon in a plan view and a bottom view, from a plurality of heatsinks on which an LED printed wiring board is attached and fixed on the outer surface, and comb-shaped heat radiation fins are projected on the inner surface,
Fluorescent or milky white hood attached to each heat sink that forms the radiator to enclose the printed circuit board of the LED, and
A pair of upper and lower retaining plates attached and fixed to the radiator plate of the radiator, as a circular shape with a size that allows the upper ends and the lower ends of the radiator and the hood to be covered together,
A top cover fixed to the upper retaining plate with a fixed air gap,
A mounting leg that is integrally suspended from the center of the lower retaining plate,
A plurality of upper and lower pairs of the first vents for cooling the LED printed wiring board communicating with the hollow interior of the hood and the second vent holes for cooling the radiation fins communicating with the hollow interior of the radiator are arranged in pairs. A portable floodlight characterized in that openings are formed in the stop plate in a radially symmetric distribution type. As a regular hexagonal shape in plan view and bottom view where the radiator is combined from a total of 6 heat sinks, center screw receiving recesses are arranged on the longitudinal center line of each heat sink,
2. The portable projector according to claim 1, wherein a printed wiring board of the LED is attached and fixed by a tapping screw that is screwed into the center screw receiving recess of each heat sink from the lateral direction. Each heat sink forming the radiator is made of aluminum extruded material with a constant width, and side screw receiving recesses parallel to the left and right ends of the plate body are arranged,
3. A pair of upper and lower retaining plates are fixedly attached to and fixed to a radiator and a hood with a tapping screw that is screwed into a side screw receiving recess of each of the radiator plates from above and below. Portable floodlight. While each radiator plate that forms the radiator is made of aluminum extrusion material with a certain width, side slide guide ridges parallel to the left and right ends of the plate body are arranged in a row,
The hood of each LED printed wiring board is made of a synthetic resin extruded material having a cross-section pseudo saddle shape or kamaboko shape, and the parallel engaging ridges formed corresponding to the left and right opening edges are formed on the side slide guide ridges on the heat sink side. 3. The portable projector according to claim 1, wherein the portable projector is detachably inserted and engaged. Each heat sink that forms the heat sink is made of extruded aluminum with a pseudo-cross section, and a pair of left and right arc-shaped hood support flanges are continuously extended from the thick plate body corresponding to the bottom of the bowl to the outside. As it forms,
5. The portable projector according to claim 4, wherein side slide guide ridges parallel to the projecting tip portions of the two support flanges are arranged. As a fixed-length cylinder that can be used by inserting and removing the mounting leg into a telescopic column such as a movable carriage or tripod, a nut is welded to the middle height of the cylinder,
A presser bolt with a decorative head that can be turned with a fingertip, which can also be a hanging rod of an AC-DC converter, is screwed and fastened to a nut of the mounting leg so as to freely advance and retract from the lateral direction. Item 3. The portable projector according to item 1 or 2.   An AC-DC converter is mounted and fixed in the hollow space of the radiator, and a connecting cover in which a plurality of third vents are distributed between the adjacent radiator plates forming the radiator is installed. The portable projector according to claim 1 or 2.

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