JPH0159681B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to electric lighting devices, and more particularly to portable high power lighting devices.

Until now, it has been technically difficult to combine high-power light bulbs with small-scale lighting equipment. In general, light bulbs that can produce light of the same brightness as those used for photographic or stage lighting have inherent problems with dissipating the heat they emit.
This severely limits the power levels that can be tolerated in small appliances. Known high power devices require bulky and cumbersome auxiliary components such as fans, heat transfer fittings, forced air ventilation, cooling coils, etc. to remove excess heat. Such components naturally require large and heavy equipment, which are difficult to use and generally lack portability. Moreover, the presence of such heat-dissipating components complicates operation, use and repair, and therefore increases costs.

An object of the present invention is to provide a small-scale stage light that is easy to handle, has good heat dissipation effects, and is easy to maintain and repair.

According to the invention, the front end and the upper open section U
A letter-shaped housing is provided which supports the light bulb and the light bulb mounting assembly, and the two rotatable members are separately hinged at opposite ends of the top of the housing. They can be rotated toward or away from each other, and furthermore, at least one of the members has an opening formed therethrough to allow air to pass therethrough and is made of a material with high thermal conductivity. The present invention has the advantage that it is possible to obtain a small-scale stage light that is easy to handle, has a good heat dissipation effect, and is easy to maintain and repair.

Referring now to the accompanying drawings, there is shown a portable electric lighting device constructed in accordance with the present invention. The device includes a housing 10 having an open front end 12 and an open top 14.

The open upper part can be closed with a first cover member 16 and a second cover member 18. Both cover members are rotatably hinged to opposite corners 22 and 24 of the top of the housing. In this way, each cover member can be rotated such that their free ends approach or move away from each other, allowing complete access to the interior of the housing, yet remaining closed during operation of the lighting device.

As best shown in FIG. 4, the free end of the second cover member is provided with an outwardly extending lip 26, and the free end of the first cover member is provided with an outwardly extending lip 26. A flange portion 28 that is offset is provided. In this manner, when the two members are in the closed position on the housing, the outwardly extending flange portion of the first member overlies and engages the lip portion of the second member. .

Note that the cover members are sized to close the open top 14 of the housing when rotated to the closed position, and both cover members are adapted to vent hot air through the openings 30. In the first member, these openings consist of louvers 32 cut across the top of this cover member. The opening in cover member 18 is defined by a plurality of laterally extending angled wings 34 . these wings 3
4 is fixed to a base member 36 extending parallel to the side wall of the housing. Preferably, the second member is made of a material with high thermal conductivity that acts as a heat sink, as described below.

A base frame 40 is fixed to the inner bottom surface of the housing. This frame is part of the light bulb mounting assembly.
It has an upright hole plate 44 and an electrical contact 46. The electrical contacts are adapted for frictional engagement by opposed metal clips 48 with corresponding metal protrusions 50 on bulb 52. Clip 4
8 sends electricity to the bulb through a power cord from a power source (not shown). The clips 48 are secured to ceramic insulation 54, which in turn is secured to the base frame 40.

As shown in FIG.
is integral with the base frame and extends across the width of the housing at approximately the midpoint of the housing. Preferably, the plate 44 is spaced from the contact portion 46 by a distance approximately equal to the length of the bulb 52.
The height of plate 44 is approximately equal to the height of the side walls of the housing, and this plate forms an abutment for lip 26 over its upper edge. Hole 56 in plate 44
is concentric with the rounded surface of the bulb 52, and the diameter of this hole is slightly smaller than the diameter of the rim 60 on the front of the bulb for purposes described below.

Spring biasing means consisting of a pair of elastic wires 58 are connected to the upper, opposite corners of the perforated plate. Each wire is slightly bent, and when it is stretched, it tends to return to its original state. Thus, as best seen in FIG. 5, when each wire 58 is extended diagonally downward from each opposite corner of the plate to a fixed position on the underside of the frame 40 and has its opposite end secured thereto, the frame Applying an upward force to 40 attempts to move it towards plate 44. Therefore, the insulating material 54 of the contact portion 46 connected to this frame 40 is moved toward the plate 44,
Therefore, the metal clip 4 supported on the insulating material 54
The front rim surface 60 of the bulb mounted at 8 can be pressed against the perforated plate 44 to hold the bulb in proper alignment within the housing. In this way, the bulb is held securely within the housing and is difficult to dislodge during use of the device.

A lever 62 is pivotally mounted to the base frame 40 to facilitate the removal of damaged bulbs.
Removal means are provided. As shown in FIG. 6, this lever includes an arm portion 64 that lies beneath the bulb and an upright portion 66 located adjacent the bulb along the inside wall of the housing. To remove the bulb, grasp it by the uprights 66 and rotate it toward the rear of the housing so that the arms 64 provide a lifting force on the bottom of the bulb and remove the bulb from the spring clip 48 and elastic wire 58. Do it like this. As shown in Figure 4, the angular displacement between the arm and the lower portion of the bulb is sufficient to displace the arm from the bulb, but the arm still cannot easily grip the bulb. It can be rotated enough to remove the light bulb.

The interior of the housing also includes a mounting bracket 68 extending across it. This bracket is preferably adjacent to a perforated plate 44, and extends a sufficient distance from the perforated plate to provide an insertion area 70 into which a light filter, lens, light bulb protector, color frame, etc. can be inserted. It has a plate member offset from the front.

Additionally, the housing includes a back plate 72 to which a knob 74 is mounted. The plate extends across the rear end of the housing and is provided with a port 76 through which a power cord 78 can be passed for connection to a power source.

A mounting knob 80 is connected to one side wall of the housing, and a bracket 82 is secured to this. A handle member 84 is removably connected to this bracket to allow manual operation of the lighting device. The knob 80 is threaded and can be turned to loosen the bracket and adjust or align the angle of the housing. The handle 84 may be removed and the bracket may be attached to a fixed means such as a base. Of course, the knob 74 assists in manually adjusting the lighting device.

A particularly advantageous feature of the device according to the invention lies not only in its size but also in its ability to dissipate the heat emitted by the bulb 52. The second member 18 is made of a material with high thermal conductivity to facilitate heat removal. This member is typically a cast or molded aluminum part, which easily conducts heat and is lightweight.

Additionally, the bottom of the housing optionally includes a louver having an opening designated by reference numeral 86. The inclusion of such louvers allows air to enter and exit the housing, further enhancing the heat removal effectiveness of the device.

A further advantage of the device of the invention is that it is easy to use. Note that an upwardly sloped end 31 extends from the flange member 28. This end is beveled at an angle coextensive with the wing 34, which, in addition to being aesthetically pleasing, can be easily grasped to lift the first cover member from the lip 26, as shown in phantom in FIG. It can be rotated to any position. Similarly, after that, the heavy second cover member 1
8 grips either the outwardly extending lip 26 or one wing near the free end of the member, and
It can be rotated rearward to the position shown in phantom in the figure. When the housing is opened in this manner, the interior of the housing is ready for cleaning.

To close the housing and operate the device, the above procedure is reversed, rotating the second member 18 downwardly and inserting the outwardly extending lip 26 into the perforated plate 4.
Place it on the upper edge 16 of 4. After that, the cover member 16
A staggered flange 28 extending outwardly from the lip 26
Rotate the cover member 16 to a position where it rests on the top surface of the cover member 16.

Having described the invention in terms of preferred embodiments,
It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the scope and spirit of the invention. Accordingly, the invention is not intended to be limited to the embodiments described above, but rather is defined only by the scope of the claims.

[Brief explanation of drawings]

1 is a perspective view of a portable lighting device of the present invention, FIG. 2 is an enlarged partial view of the device of FIG. 1, with the light bulb removed and the cover member of the housing opened; Figure 3 is a sectional view taken along line 3-3 in Figure 2, Figure 4 is a sectional view taken along line 4-4 in Figure 1, and Figure 5 is a perspective view showing a spring for holding the light bulb. , FIG. 6 is a perspective view showing a lever for taking out a light bulb. DESCRIPTION OF SYMBOLS 10... Housing, 12... Open front end, 14... Open upper part, 16... First cover member, 18... Second cover member, 26... Lip part, 28... Flange part, 30
... opening, 32 ... louver, 34 ... wing, 36 ... base member, 40 ... base frame, 44 ... plate with hole, 46 ... electrical contact part, 48 ... clip, 50
...metal protrusion, 52...bulb, 56...hole, 58...elastic wire, 60...rim of bulb front, 62...lever, 64...arm part, 66...upright part, 68...mounting bracket, 78...power cord, 80 ...Mounting knob, 82...Bracket, 84...Handle member.

Claims (1)

[Scope of Claims] 1. A housing having an open front end and an open upper part, the upper part being closeable by first and second members, each member being connected to an upper opposite part of the housing. the free ends of these members abut each other when closing the top of the housing;
a light bulb assembly disposed within the housing, wherein a light bulb is mounted towards the open front end of the housing, the assembly supporting electrical contact means for providing power to the light bulb; a bottom frame secured to the housing, and further a plate having holes aligned with the front end of the housing is secured within the housing, and further, at least one of the members is air permeable. 1. A portable light comprising an opening penetrating through the light, and at least one of said members being made of a metal material with high thermal conductivity. 2. A light as claimed in claim 1, further comprising spring biasing means mounted within the housing for crimping the outer surface of the bulb to maintain the bulb in a fixed position. 3 said perforated plate extends across said housing and is spaced from said contact means by a distance approximately equal to the length of said bulb, said spring biasing means contacting said bulb near an opposite side of said bulb; 3. A light according to claim 2, comprising an elastic wire fixed to the upper part of the perforated plate and to the frame so as to provide a spring biasing force. 4. A light as claimed in claim 1, wherein the aperture in at least one of the members comprises a plurality of upwardly sloping wings. 5. The light of claim 3, further comprising a mounting bracket disposed within the housing in a spaced plane parallel to the perforated plate. 6 The free end of one of said members has an outwardly extending lip portion, and the free end of the other said member has an outwardly extending offset flange portion, said members closing the open top of said housing. 2. A light as claimed in claim 1, wherein said flange portion sometimes overlies said lip portion. 7. A light according to claim 1, wherein the housing is generally U-shaped in cross section and includes a plate across its rear end. 8. Claim 1, wherein the member closest to the light bulb is made of the metal material with high thermal conductivity.
Lights listed in section. 9. Claim 8, wherein a handle means is attached to the casing so that the light can be operated by hand.
Lights listed in section.