JP7112656B2 - lighting equipment - Google Patents

Description

TECHNICAL FIELD The present invention relates to a lighting fixture, and more particularly to the structure of a lighting fixture with a waterproof function.

The luminaire structure comprises at least a light emitting part and an adjacent power supply part. Recently, bulb-type LED lamps using light-emitting diodes as light sources have been widely used. Broadly speaking, the structure of a light bulb-shaped LED lamp consists of a power supply unit formed with an E-type base, a power supply unit for LED elements, and a light emitting unit containing a substrate (single or plural) on which LED elements are mounted. formed.

JP 2014-75257 "LED light bulb" (Published date: 2014/04/24) Applicant: ROHM Co., Ltd. JP 2016-122578 "LED lamp" (Published date: 2016/07/07) Applicant: Iwasaki Electric Co., Ltd.

In fields where HID lamps (high intensity discharge lamps) have been used, they are being replaced by LED lamps in order to reduce power consumption. In this case, the LED lamp using the E-type base is put into the HID lighting equipment and used. Therefore, the waterproof function of the lamp depends on the waterproof structure of the HID lighting fixture. The HID lamp is glass-sealed all around except for the cap, and the waterproofing of the lamp is achieved by providing an appropriate waterproofing means at the bottom of the power supply socket and providing a waterproof mechanism between the power supply socket and the cap. was possible.

However, in the case of the LED lamp, gaps between the constituent parts are exposed to the outside, and a similar waterproof mechanism cannot be used. Therefore, when the LED lamp is used outdoors or the like, the entire lamp is housed in a waterproof mechanism. Alternatively, a suitable waterproof means is provided on the bottom of the power supply socket to which the LED lamp is attached, and the structure of the LED lamp itself is provided with a waterproof function. That is, in the LED lamp structure, the power supply part, the power supply part, and the light emitting part each have a waterproof function, and further, the waterproof packing is arranged at the connection point of each part of the LED lamp structure.

The applicant has already filed a patent application for an LED lamp that adopts a new waterproof packing placed between the power supply socket and the power supply unit (Note: This application has not been published at the time of filing this application. .). As a next step, the present inventor has continued research and development on a new waterproof packing to be placed between the power supply section and the light emitting section. Accordingly, the present invention relates to lighting fixtures (including LED lamps) employing a novel waterproof packing disposed between a power supply section and a light emitting section.

On the other hand, LED lamps have a relatively complicated structure, which requires labor for assembly and tends to be produced in small lots of various types. Therefore, it is desirable to reduce the number of parts and assembly man-hours to reduce costs.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a novel luminaire having a waterproof function.
A further object of the present invention is to provide a lighting fixture in which a novel waterproof packing is arranged between a power source section and a light emitting section adjacent thereto.
A further object of the present invention is to provide a lighting fixture with reduced cost.

In view of the above problems, one aspect of the lighting device according to the present invention is a lighting fixture having a waterproof function that includes at least a light emitting unit and a power supply unit connected thereto, wherein the power supply unit includes a power supply circuit. A cup-shaped container is provided, the cup-shaped container is made of an elastic member, and has an edge formed at an open end thereof, and the edge of the open end is interposed between the light emitting section and the power supply section. It functions as a waterproof packing.

Further, in the above lighting fixture, the power supply circuit may be filled with a filler within the cup-shaped container, and the cup-shaped container may be arranged within an outer case.

Further, in the above lighting fixture, the edge of the open end may extend radially outward from the open surface of the cup-shaped container so as to cover the entire thickness of the outer case or partially cover the outer case.

Further, in the above lighting fixture, the cup-shaped container has an insertion hole for a power cable formed in the side surface, and the insertion hole is in the form of a separate chamber from the internal space of the cup-shaped container, and extends in the direction of the lamp axis. , and the upper and lower ends may be open.

Further, in the lighting fixture, ribs are formed inside the outer case corresponding to positions of power cable insertion holes formed in the cup-shaped container, and the cup-shaped container and the outer case are provided with ribs. may have a relative positioning function.

Further, in the above lighting fixture, the cup-shaped container has a screw hole packing formed on a side surface, and the screw hole packing surrounds the screw that connects the power supply unit and the light emitting unit and has a waterproof function. may be played.

Furthermore, the lighting fixture may further include a power supply section, and the power supply section may be connected to the power supply socket with a waterproof packing interposed therebetween.

Further, in the above lighting fixture, the light-emitting section may be an LED unit, the power supply section may be an LED power supply, and the power supply section may be an E-type base to constitute an LED lamp.

ADVANTAGE OF THE INVENTION According to this invention, the novel lighting fixture which has a waterproof function can be provided.

Furthermore, according to the present invention, it is possible to provide a lighting fixture in which a novel waterproof packing is arranged between a power supply section and a light emitting section adjacent thereto.

Furthermore, according to the present invention, it is possible to provide a lighting fixture with reduced cost.

FIG. 1 is a side perspective view of an LED lamp and a power supply socket according to the first embodiment. FIG. FIG. 2 is a diagram for explaining the power supply section of the LED lamp shown in FIG. FIG. 3(A) is a perspective view showing a state in which a cup-shaped container housing a power supply circuit of a power supply unit is assembled in an outer case, and FIG. It is a perspective view of the state which covered and assembled. 4A and 4B are diagrams for explaining the functions of the cup-shaped container that houses power supply components. FIG. 5 is a diagram for explaining the second embodiment. FIG. 6 is a diagram for explaining the second embodiment. FIG. 7 is a diagram for explaining the third embodiment.

Hereinafter, the structure of the lighting fixture according to the present invention will be described in detail with reference to the accompanying drawings. In addition, in the drawings, the same reference numerals are given to the same elements, and redundant explanations are omitted.
In the embodiments described below, an LED lamp will be described as an example of a lighting fixture, but the lighting fixture is not limited to this. The first embodiment relates to the waterproof structure of the LED lamp, and the second and third embodiments relate to the proposed screw fastening for attaching the LED unit when realizing the waterproof structure of the LED lamp.

[First embodiment]
(Structure of LED lamp)
In general, a lighting fixture used outdoors or the like includes at least a light emitting section and a power supply section adjacent thereto. For example, the LED lamp introduced in this embodiment is similarly formed of a light emitting section, a power supply section adjacent thereto, and a power supply section.

The structure of the LED lamp 10 according to the first embodiment will be briefly described with reference to FIGS. 1 and 2. FIG. The structure of the LED lamp 10 includes a power supply unit 2 formed with an E-type base 2a that can be attached to an existing light bulb socket, a power supply unit 4 that adjusts the power supply voltage from the power supply unit and supplies power to the LED element, and the LED element and a light-emitting portion 6 containing printed circuit boards (four in the figure) 6a on which are mounted. The LED lamp 10 is used by screwing the E-type base 2a of the power supply unit 2 into the power supply socket 50. As shown in FIG.

Originally, the structure of the LED lamp 10 using the E type base 2a does not have a waterproof function. Therefore, when providing a prevention function for outdoor use, an appropriate waterproofing means (not shown) is provided at the bottom of the power supply socket 50 to which the LED lamp 10 is attached, and between the power supply socket 50 and the power supply section 2. A waterproof packing 14 is interposed and designed to impart a waterproof function to the structure of the LED lamp 10 .

The waterproof function of the LED lamp 10 shown in FIG. 1 is achieved by integrating the power supply unit 2 and the power supply unit 4, housing the power supply unit in a resin case having a waterproof function, and housing the light emitting unit 6 in a resin case having a waterproof function. is doing. Furthermore, it is necessary to employ a suitable waterproof packing between the power supply unit 4 and the light emitting unit 6 as well. Next, this waterproof packing will be described in detail.

(cup-shaped container)
The cup-shaped container 4f that functions as the waterproof packing will be described with reference to FIGS. 2 and 3. FIG. FIG. 2 is a diagram for explaining the power source section 4 of the LED lamp shown in FIG. FIG. 3(A) is a perspective view showing a state in which a cup-shaped container 4f containing a power supply circuit of a power supply section is incorporated in an outer case 4a, and FIG. It is a perspective view of the assembled state covered with the base case 6b.

Here, the base case 6b may be made of any rigid insulating material. The base case 6b is typically preferably made of resin. For example, it is made of FRP such as glass fiber reinforced PBT (polybutylene terephthalate), polycarbonate, acrylic resin, or the like.

In the first embodiment, the power supply unit 4 has a structure in which a bowl-shaped outer case 4a is covered with a base case 6b of the LED unit 6. As shown in FIG. Both cases have a screw hole (through hole) 4c formed in a concave portion 4b formed in the lamp axial direction on the outer peripheral curved surface of the outer case 4a, and a base case 6b formed corresponding to the screw hole. It is screwed and fitted using a bottom screw hole (blind hole) 6c (not shown). In the drawing, three screw holes 4c are formed at regular intervals, that is, at 120° intervals on the opening surface of the outer case 4a (cup-shaped container 4f).

After the power supply circuit 4d is accommodated in the cup-shaped container 4f, it is filled with a filler to enhance the weather resistance and vibration resistance of the power supply components. A cup-shaped container 4f containing a power supply circuit 4d filled with a filler is arranged and fixed inside the outer case 4a. A resin is typically used as the filler. For example, an epoxy resin, a urethane resin, a silicon resin, or the like is used as the filler.

(Edge of cup-shaped container)
Since the power supply circuit 4d is solidified with a filler, the cup-shaped container 4f does not require rigidity from the viewpoint of vibration resistance, and an elastic member can be employed. Therefore, by devising the shape of the cup-shaped container 4f, it has become possible to use it as a waterproof packing between the power supply unit 4 and the light emitting unit 6 as well.

The cup-shaped container 4f has a rim 4g formed at the open end. The opening edge portion 4g spreads outward in the radial direction of the opening surface so as to entirely or partially cover the thickness of the outer case 4a. The opening edge portion 4g of the cup-shaped container 4f functions as a waterproof packing between the outer case 4a and the LED unit 6 (specifically, the base case 6b) (fitting edge). . By integrating the cup-shaped container 4f and the packing, there is no need to prepare and incorporate a waterproof packing between the outer case and the LED unit separately from the cup-shaped container 4f that houses the power supply circuit 4d.

(Power cable insertion hole in cup-shaped container)
Here, if a hole for inserting the power cable from the power supply circuit 4d to the base 2a is formed in the bottom of the cup-shaped container 4f, when the liquid resin is poured, it drips from the hole, resulting in poor workability. Therefore, an insertion hole 4i for the power cable is formed in the side surface of the cup-shaped container 4f. The insertion hole 4i is in the form of a separate chamber from the inner space of the cup-shaped container 4f, extends in the lamp axial direction, and has open top and bottom ends. Since the surface of the resin is lower than the insertion hole 4i when viewed in the lamp axis direction, the liquid resin does not flow into the insertion hole.

Correspondingly, ribs 4j extending radially inward are formed on the inner peripheral surface of the outer case 4a. The radial length of the rib 4j is shorter than the radial length of the insertion hole 4i. Since there is no resin in the insertion hole 4i, the portion of the outer peripheral surface of the insertion hole of the cup-shaped container 4f remains an elastic member. Therefore, the rib 4j presses the cup-shaped container 4f radially inwardly from the outer peripheral surface of the insertion hole and divides the cup-shaped container 4f at least partially along the lamp axial direction. By providing such insertion holes 4i and ribs 4j, the following advantages and effects are obtained.

(1) Relative positioning of the outer case 4a and the cup-shaped container 4f is possible. That is, since the screw holes 4c and 6c are provided at equal intervals (120° intervals in FIG. 2), the screw holes are aligned even if there is a relative displacement of 120°, but this can be prevented.
(2) Since the insertion hole 4i is divided by the rib 4j, two power cables from the power supply circuit 4d to the base 2a can be individually inserted.

A power cable (not shown) connected to the power circuit passes through the insertion hole 4i, passes through the inside of the outer case 4a, reaches the inside of the E-type base 2, and is connected to a predetermined location. By providing the insertion hole 4i for the power cable, the liquid resin does not come into contact with the power cable, and the power cable is directly connected to the E type base 2 through the inside of the outer case 4a without being exposed to the outside of the lamp. can do

(Function of cup-shaped container)
FIG. 4 is a diagram for explaining the packing function of the cup-shaped container that houses power supply components. (A1) and its partially enlarged view (A2) are diagrams for explaining the waterproof packing function of the fitting edge between the power supply section and the LED unit. FIG. 4(A1) corresponds to the side view of FIG. 3(B), and FIG. 4(A2) is an enlarged view of the portion surrounded by the dashed circle. In FIG. 4A2, the part painted in gray is the cup-shaped container 4f that functions as a waterproof packing at the fitting edge between the outer case 4a of the power supply unit 4 and the base case 6b of the LED unit 6. This is the opening edge portion 4g.

Here, the outer case 4a may be made of any rigid insulating material. The outer case 4a is typically preferably made of resin, for example, FRP such as glass fiber reinforced PBT (polybutylene terephthalate), polycarbonate, acrylic resin, or the like.

The cup-shaped container 4f may be made of any material as long as it has rubber elasticity that functions as a packing. The cup-shaped container 4f is made of, for example, rubber or resin, and is typically made of silicon resin, silicon rubber, urethane, or an elastomer such as TPE (thermoplastic elastomer) or TPS (styrene-based thermoplastic elastomer). be done.

The cup-shaped container 4f may be made of thick and hard rubber, or the entire cup-shaped container may not be made of the same material, and the opening end edge 4g of the cup-shaped container 4f may function as a rubber packing. If the portion of the cup-shaped container 4f other than the opening edge portion 4g is made of a resin or the like and has a predetermined rigidity, the power supply circuit has a certain level of vibration resistance. need not be filled with filler.

As described above, the cup-shaped container 4f (or at least the opening edge portion 4g, the same shall apply hereinafter) is made of an elastic material that is soft to some extent. It has the property of sealing a space and generating a repulsive force against it. Therefore, when the opening edge of the cup-shaped container is arranged between the members to be fitted, it is closely engaged with both members to achieve a sealing effect, preventing the infiltration of moisture from the outside, which is a waterproof function. play.

Three packings 4h for screw holes are formed on the inner peripheral side of the opening edge portion of the cup-shaped container, the packings 4h being arranged at equal intervals on the circumference. The screw hole packing 4h functions as a waterproof packing against water penetrating into the power supply section from the screw holes 4c of the outer case 4a through the gap between the outer case and the base case.

FIG. 4 (B1) and its partial enlarged view (B2) are diagrams for explaining the waterproof packing function around the screw hole connecting the power supply section and the LED unit. FIG. 4(B1) corresponds to the side view of FIG. 3(B), and FIG. 4(B2) is an enlarged view of the portion surrounded by the dashed line circle. In FIG. 4B2, the portion painted in gray is the packing 4h for the screw hole of the cup-shaped container 4f.

The cup-shaped container 4f is a structural member that has the following three functions by adopting a specific shape and material as described above.

(1) The original function of housing and fixing the components of the power supply circuit 4d and arranging them in the outer case 4a of the power supply (see FIG. 3(A))
(2) Waterproof packing function of the fitting edge between the power supply unit 4 (specifically, the outer case 4a) and the LED unit 6 (same, the base case 6b) (see Fig. 4 (A1, A2))
(3) Waterproof packing function around the screw hole that connects the power supply unit (same, outer case) and the LED unit (same, base case) (see Fig. 4 (B1, B2))

[Second embodiment]
5 and 6 are diagrams for explaining the second embodiment. The second embodiment relates to a screwing method for fixing a resin cover (resin) that covers an LED element-mounted printed circuit board to a mount (die-cast member) in an LED unit.

As shown in the upper half of FIG. 5, the target locations are the upper and lower portions of each resin cover. A pilot hole for a tapping screw is formed in the die cast member. The point of screwing is to install without damaging the resin (resin cover). Therefore, we developed screws with different shaft diameters , pressed the metal sheet metal material at the step where the shaft diameter changes from a relatively thin shaft diameter to a thick shaft diameter, and made the hole diameter of the resin (resin cover) larger than the thick shaft diameter of the screw. I made it a little bigger so it wouldn't hurt. The metal sheet metal material is used for positioning and attaching the four resin covers (resin).

In pattern (1), a metal plate material is applied to a die-cast member, and resin is layered thereon. The pilot hole of the metal sheet metal is smaller than the thick shaft diameter of the screw and larger than the thin shaft diameter. At the stage of screwing, the hole in the resin is slightly larger than the thick shaft diameter of the screw, and the plate thickness of the resin is slightly thinner than the length of the thick part of the screw, so there is play, and the resin is not damaged by screwing.

In pattern (1)-1, instead of changing the shaft diameter of the screw, a cylindrical metal spacer is passed through the screw shaft to replace the thick shaft diameter.
Pattern (2) is obtained by burring a sheet metal material, and the pilot hole of the die-cast member is smaller than the thick shaft diameter of the screw and larger than the thin shaft diameter.
Pattern (3) reverses the burring direction of the sheet metal material.
Pattern (4) is a method in which ribs are provided on a die-cast member.
In pattern (5), the shaft diameter of the screw is constant, and the pilot hole portion of the die-cast member is thickened for screwing.

[Third Embodiment]
FIG. 7 is a diagram for explaining the third embodiment. In the LED unit of the third embodiment, a resin cover (resin) that covers the LED element-mounted printed circuit board is screwed to the mount (die-cast member) at two locations on both ends. In the case of screwing at two locations on both ends, one screwing location has a slit structure to absorb dimensional tolerances of members, misalignment between screw holes and mounting holes, and the like. In general, the slit structure has a straight U-shaped recess as shown in FIG.

In the third embodiment, the width of the U-shaped relief portion is made equal to or less than the diameter of the screw, as shown in the "unscrewed state" shown in FIG. 7(B-2). In this way, even when the other screw is loosened and this screw is loosened, the resin cover (resin) is caught by the screw and does not come off from the screwed portion.

[Features, advantages, effects, etc. of the present embodiment]
Next, the features, advantages, effects, etc. of this embodiment will be described.
(1) By adopting the cup-shaped container 4f and integrating the power supply circuit storage container and the packing between the power supply section and the LED unit, it is possible to reduce the number of parts, reduce the number of assembly steps, and reduce costs. did it.
(2) In general, since the packing is thin and elastic, it is soft. Therefore, it takes time to position the packing between the members to be connected. Even a slight misalignment or deformation during placement will damage the waterproof function. In this embodiment, by using the edge 4g of the cup-shaped container 4f as a packing, the packing can be positioned simply by inserting the cup-shaped container 4f into the outer case 4a having the same inner peripheral shape as the outer shape of the cup-shaped container 4f. Easy and complete.
(3) The cup-shaped container 4f itself is made of an elastic member, but since the inside is filled with a filler, mechanical strength (rigidity) is imparted to the cup-shaped container 4f, and it has a stable shape. Even if the edge portion 4g, which is an elastic member, is thin, it can maintain its original shape because it is integrated with the power container.
(4) By providing an insertion hole 4i for the power cable extending from the power supply circuit 4d to the mouthpiece 2a on the inner side surface of the cup-shaped container 4f, positioning is possible using the rib 4j formed on the inner side surface of the outer case 4a. be possible. Since the insertion hole 4i is divided into two parts by the rib 4j, the movable range of each power supply cable is restricted and the cable routing is facilitated.

[others]
As described above, the lighting fixture according to the present embodiment has been described by taking the LED lamp as an example, but these are examples and do not limit the scope of the present invention. INDUSTRIAL APPLICABILITY The present invention can be applied to lighting fixtures in general that include a power supply unit and a light emitting unit connected thereto. The power supply part is not limited to the E type base, and may be of any type such as a pin type.

Additions, deletions, changes, improvements, etc. that a person skilled in the art can easily make to this embodiment are within the scope of the present invention. The technical scope of the present invention is defined by the attached claims.

2: Power supply part 2a: E type base 4: Power supply part 4a: Outer case 4b: Recess 4c: Screw hole 4d: Power supply circuit 4f: Cup-shaped container 4g: Edge, opening edge , packing 4h: packing for screw hole 4i: insertion hole 4j: rib 6: light emitting part, LED unit 6a: printed circuit board 6b: base case 10: LED lamp 14: waterproof packing 50 : Power supply socket

Claims (8)

In a lighting fixture having at least a light emitting part and a power supply connected thereto and having a waterproof function,
A cup-shaped container containing a power supply circuit is arranged in the outer case of the power supply unit,
The cup-shaped container is made of an elastic member with a rim formed at the open end ,
The power supply circuit is filled with a filler and fixed in the cup-shaped container,
The luminaire, wherein the edge of the open end of the cup-shaped container is interposed between the light emitting section and the power supply section to function as a waterproof packing. A lighting fixture according to claim 1 ,
The luminaire, wherein the edge of the open end extends radially outwardly of the open face of the cup-shaped vessel to cover the entire thickness of the outer case or partially. The lighting fixture according to claim 1 or 2 ,
The cup-shaped container has an insertion hole for a power cable formed on a side surface,
The lighting fixture, wherein the insertion hole is in the form of a separate chamber from the inner space of the cup-shaped container, extends in the lamp axis direction, and is open at upper and lower ends. A lighting fixture according to claim 3 ,
Ribs are formed on the inner side of the outer case corresponding to the position of the power cable insertion hole formed in the cup-shaped container to perform a relative positioning function between the cup-shaped container and the outer case. A lighting fixture that plays. In the lighting fixture according to any one of claims 1 to 4 ,
The cup-shaped container has a screw hole packing formed on a side surface,
The lighting fixture, wherein the screw hole packing surrounds a screw that connects the power supply unit and the light emitting unit to achieve a waterproof function. 2. The lighting fixture of claim 1, further comprising a power feed,
The lighting fixture, wherein the power supply unit is connected to a power supply socket with a waterproof packing interposed therebetween. A lighting fixture according to claim 6,
The light emitting unit is housed in a waterproof resin case,
The lighting fixture, wherein the power supply unit and the power supply unit are integrated, and the power supply unit is housed in a waterproof resin case. A lighting fixture according to claim 7,
The light emitting unit is an LED unit,
The power supply unit is an E type base ,
The lighting fixture , wherein the power supply section comprises the power supply circuit, adjusts the power supply voltage from the E-type base, and supplies power to the LED unit, and constitutes an LED lamp.

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