KR20210124793A - Street lamp - Google Patents

Abstract

The present invention relates to a street lamp head for connecting a PCB of an LED module mounted on one surface of a head body and a cable fixed to the other surface of the head body. Provided is a street lamp head having a double waterproof structure for a terminal unit, which combines cables and PCBs, and cables and fixing bolts with each airtight structure, so as to increase safety by protecting a PCB and cable connection part with a double waterproof structure.

Description

Street lamp head having a double waterproof structure for the terminal part {STREET LAMP}

The present invention relates to a street lamp head connecting a PCB of an LED module mounted on one surface of a head body and a cable fixed to the other surface of the head body, and coupling between the cable and the PCB and the cable and the fixing bolt in each airtight structure. It relates to a street lamp head having a double waterproof structure for a terminal part that can increase safety by protecting a PCB and a cable connection part with a double waterproof structure.

Various technologies have been disclosed that enable semi-permanent use while reducing electricity consumption by grafting LED lighting to a conventional street lamp.

Representatively, there is published Patent Publication No. 10-2010-0122981 [Method of manufacturing a PCB equipped with a street lamp and a protective cap using an LED],

The published patent is

In a street lamp using an LED, which is equipped with a PCB having a plurality of LEDs mounted on its bottom surface and is configured with a protective cover for guiding the direction of light while protecting it;

A heat sink having a PCB insertion groove formed on a bottom surface of the street lamp is formed, and a PCB having a plurality of LEDs arranged on the bottom surface is mounted in the PCB insertion groove; Each of the LEDs is equipped with a protective cap to simultaneously perform the role of a lens, and a layer is formed on the bottom surface of the PCB except for the portion on which the protective cap is mounted to fix the protective cap, and to waterproof and A street lamp using an LED, characterized in that an epoxy molding layer is additionally formed to dissipate heat;

And in the method of manufacturing a PCB in which a plurality of LEDs are arranged and a protective cap is mounted on each LED to serve as a lens;

A protective cap mounting process of mounting a protective cap having a desired function on each LED in a PC in which a plurality of LEDs are arranged on the upper surface; a mold mounting process of inserting the PCB equipped with the protective cap into a mold having a PCB insertion part formed on an upper surface corresponding to the outline of the PCB; an epoxy molding process of forming a layer on the surface on which the LED and the protective cap of the PCB are mounted to a predetermined thickness to form an epoxy molding layer to fix the protective cap and to waterproof and radiate the PCB from the outside; It is characterized in that a series of processes of the PCB separation process for separating the mold and the PCB are continuously performed.

However, in the above patent, since the PCB for the LED is very thin, the PCB controller (converter) for power supply, etc. is mounted on the outside (rear side) of the head housing as the size and thickness of the housing on which the PCB is mounted also decreases. In this case, there is a problem in that the part connected by the cable between the PCB and the converter has a low airtightness, so that a breakdown or malfunction due to chip attack frequently occurs.

In addition, in order to dissipate heat from the PCB, the head housing must be made of a metal material. If the metal head housing is simply installed, electric shock or failure due to electrical conduction is easy to occur. However, when the PCB is attached to the head housing with the insulation coating, there is a problem in that the heat conduction efficiency due to the insulation is lowered, so that the heat dissipation performance is deteriorated.

Accordingly, the present invention has been devised to solve the above problems,

Providing a street light head with a double waterproof structure for the terminal part that can increase safety by protecting the connection between the PCB and the cable with a double waterproof structure by combining the cable and the PCB, and between the cable and the fixing bolt with each airtight structure. aim to

In order to achieve the above object, the street lamp head according to the present invention,

In the street lamp head comprising a PCB of an LED module mounted on one surface of the head body, and a cable inserted into the other surface of the head body and connected to the PCB,

a connection hole formed through the head body and having a first female thread on an inner circumferential surface;

a cable whose end is inserted into the connection hole to be connected to the terminal unit of the PCB;

A fixing bolt through which the cable is inserted through, and having a first male thread screw-coupled to the first female thread to fix the cable, and a fixing bolt having a second male thread spaced apart from the rear end of the first male thread ; and

It characterized in that it comprises a; airtight nut through which the cable is fitted through, and having a second female thread screw-coupled to the second male thread to seal the gap between the cable and the fixing bolt.

And the street lamp head according to the present invention,

It characterized in that it comprises a; airtight adhesive applied along the edge of the connection hole to which the fixing bolt is screwed to seal the gap between the connection hole and the fixing bolt.

Further in the street lamp head according to the present invention,

The fixing bolt is a soft material, including a tightening part having an airtight end protruding inward from the rear end side of the second male thread,

When the airtight nut is screwed to the second male thread of the fixing bolt, the airtight end of the tightening part is tightened inwardly by the airtight nut to be in close contact with the outer circumferential surface of the cable.

Also in the street light head according to the present invention,

The tightening part further comprises a plurality of pressing ends arranged to be spaced apart from each other by a predetermined distance in a radial direction in the circumferential direction of the airtight end,

The plurality of airtight ends are formed to be inclined at a predetermined angle toward the tightening direction of the airtight nut.

Street lamp head according to the present invention,

The double waterproof structure for the connection part of the PCB and the cable has excellent waterproof performance. In particular, the waterproofing by screwing the fixing bolts and airtight adhesive, and by tightening the airtight nut, are made of two layers. prevent failure,

There is an effect of increasing the quality of light by reducing light consumption while maintaining a constant color, temperature, and wide angle of light, along with securing waterproof performance for PCB.

1 is a cross-sectional view of a main part of the present invention;
2 is a perspective view of a cable assembly according to the present invention;
Figure 3 is a primary exploded perspective view of a street lamp head according to the present invention.
Figure 4 is a bottom view and a plan view of a street lamp head according to the present invention.
5 is a cross-sectional view schematically illustrating a sealing sheet lamination process according to the present invention.

The present invention is intended to be described in detail in the text of the embodiment (態樣, aspect) (or embodiments) can be applied to various changes and can have various forms. However, this is not intended to limit the present invention to the specific disclosed form, it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention.

In each drawing, the same reference numerals, particularly the tens digit and the one digit, or the tens digit, the one digit, and the same alphabetic reference numerals indicate members having the same or similar functions, and, unless otherwise stated, each The member indicated by the reference sign may be understood as a member conforming to these standards.

In addition, in each drawing, components are expressed in exaggeratedly large (or thick) or small (or thin) in size or thickness in consideration of convenience of understanding, or simplified, but the protection scope of the present invention is limited by this. it shouldn't be

The terminology used herein is only used to describe a specific embodiment (aspect, aspect, aspect) (or embodiment), and is not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise.

In the present application, terms such as comprises or consists of are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification is present, but one or more other features It is to be understood that it does not preclude the possibility of the presence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and should not be interpreted in an ideal or excessively formal meaning unless explicitly defined in the present application. does not

~1~, ~2~, etc. described in the present specification will be referred to only to distinguish that they are different components, and are not limited to the order of manufacture, and their names in the detailed description and claims of the invention are may not match.

In describing the street lamp head according to the present invention, for convenience, if an approximate direction standard that is not strict is specified with reference to FIG. 1, the direction in which gravity acts is the downward direction and the vertical and horizontal directions are determined as they are, and related to other drawings. In the detailed description and claims of the invention, unless otherwise specified, directions are specified and described according to this standard.

Hereinafter, a street lamp head according to the present invention will be described with reference to the accompanying drawings.

The present invention relates to a street lamp head, as shown in FIGS. 1 to 5,

A street lamp head including a PCB 22 of the LED module 20 mounted on one surface of the head body 10 and a cable 30 inserted into the other surface of the head body 10 and connected to the PCB 22 in,

a connection hole (12) formed through the head body (10) and having a first female thread (12a) on an inner circumferential surface;

a cable 30 having an end inserted into the connection hole 12 and connected to the terminal 22b of the PCB 22;

The cable 30 is inserted therethrough, and a first male thread 41 screwed to the first female thread 12a is provided to fix the cable 30, and the first male thread 41 is provided. a fixing bolt 40 having a second male thread 42 spaced apart from the rear end side of the; and

The cable 30 is inserted therethrough, and a second female thread 51 screwed to the second male thread 42 is provided to seal the gap between the cable 30 and the fixing bolt 40 . Airtight nut 50; includes.

First, the head body 10 is a heat dissipating member made of metal or plastic of a heat dissipating material, and includes a mounting part 11 on one side, a connection hole 12 formed through one side of the mounting part 11, and a protruding surface on the other side. It has a plurality of heat dissipation parts 13 , and an insulating coating layer 14 is formed on the surface except for the mounting part 11 .

The head body 10 is a plate-shaped member, and in the drawings, an embodiment in which the LED module 20 is mounted on the bottom (front) of the head body 10 by being connected to the upper end of the post of the street lamp is representatively shown, but this not limited

The mounting part 11 is a part of the surface of the head body 10 and is referred to as a specific part for convenience of understanding, but the mounting part 11 is not provided as a separate structure and is an area corresponding to the LED module 20 It refers to the area where the insulating coating is not formed.

The connection hole 12 is formed through both surfaces of the head body 10, and a first female thread 12a is provided on an inner circumferential surface.

The heat dissipation part 13 is composed of a plurality of heat dissipation protrusions 13a protruding from the upper surface (rear surface) of the head body 10 and connected in the front and rear longitudinal directions, wherein some of the heat dissipation protrusions 13a have fitting grooves ( 13b) is formed so that the controller mounting case 15 is fitted and coupled to the fitting groove 13b.

The insulating coating layer 14 is formed by applying an insulating paint or the like to the surface of the head body 10 , and in this case, an insulating coating layer 14 is formed on a portion corresponding to the total area of the LED module 20 through the connection hole 12 . ) is not formed, and the corresponding part is used as the mounting part 11 .

The case 15 is equipped with an LED module 20 mounted on the head body 10 and a converter (not shown) connected by a cable 30 to protect it, and is composed of a pipe-shaped frame having a predetermined length. A fitting protrusion (15a) that is slidably coupled to the fitting groove (13b) is provided on one side thereof, and is fixed by bolting to a position other than the mounting part (11) after sliding coupling.

The converter is mounted in the case 15 by bolting, and a separate cap (not shown) for protecting the converter is coupled to the front and rear openings of the case 15 .

This converter is connected to the connection port 33 of the cable 30 fixed to the connection hole 12 to control the operation of the LED module 20 .

And the LED module 20 is mounted in close contact with the mounting part 11, and includes a metal PCB 22 provided with the LED element 22a.

The PCB 22 has a thin thickness, and in particular, a flexible PCB (FPCB), that is, a flexible substrate, is used to form the mounting part 11 on the convex surface of the head body 10 to attach the PCB 22 in full close contact. make it possible

Next, the cable 30 is coated with a metal conductive wire 32 such as copper (31), the conductive wire 32 is connected to one end, and a connection port 33 for controlling the LED module 20 is connected to the other end. connected.

In the drawings of the present specification, a cable 30 in which two conductors are coated as one for normal power supply is shown as a representative example.

Correspondingly, a terminal portion 22b to which the conductive wire 32 of the cable 30 is fixedly connected is provided on the rear surface of the PCB 22 .

The terminal part 22b is positioned on the connection hole 12 , and the conductive wire of the cable 30 is inserted into the connection hole 12 and fixed through soldering or the like.

The fixing bolt 40 has a first hollow part 43 formed through it in the longitudinal direction, the cable 30 is fitted, and the first male thread 41 is provided at the front end of the connection hole ( 12) while screwing the cable 30 connected to the terminal part 22b in a vertical direction with respect to the PCB 22 and fixing it.

In addition, the fixing bolt 40 is provided with a locking end 41a protruding outward from the upper end of the first male thread 41, so that the locking end 41a when screwing is connected to the edge of the connection hole 12. keep it confidential

Further, the present invention includes an airtight adhesive 44 that is applied along the edge of the connection hole 12 to which the fixing bolt 40 is screwed to seal the gap between the connection hole 12 and the fixing bolt 40. do.

The airtight adhesive 44 prevents the fixing bolt 40 from being loosened and separated in the connection hole 12 , and at the same time fills a fine gap between the connection rod and the fixing bolt 40 to provide moisture into the connection hole 12 . To prevent invasion, it is preferable to apply between the edge of the connection hole 12 and the engaging end 41a.

The airtight nut 50 has a second hollow part 52 formed through it in the longitudinal direction, the cable 30 is fitted, and the second female thread 51 is provided on the inner surface of the front end to provide the fixing bolt. While screwed to (40), the first hollow part (43) is covered to make the cable 30 and the adjustment bolt waterproof.

Further, in order to improve the waterproof performance through the airtight nut 50,

The fixing bolt 40 is a soft material and includes a tightening portion 45 having an airtight end 45a protruding inward from the rear end side of the second male thread 42,

When screwing the airtight nut 50 to the second male thread 42 of the fixing bolt 40 , the airtight end 45a of the tightening part 45 is inside by the airtight nut 50 . It is tightened to be in close contact with the outer circumferential surface of the cable 30 .

The tightening portion 45 is attached to and coupled to the rear end of the fixing bolt 40 with a soft material such as rubber, and pressing the tightening portion 45 inward while the tight nut 50 is tightened, the airtight end (45a) is in close contact with the outer circumferential surface of the cable 30 while contracting inward.

Furthermore, the tightening part 45 further includes a plurality of pressing ends 45b arranged to be spaced apart from each other by a predetermined distance in a radial direction in the circumferential direction of the airtight end 45a.

The pressing ends (45b) are separated from each other and can be bent and tightened inward toward the cable (30),

In particular, the tightening direction of the airtight nut 50 is formed to be inclined at a predetermined sailing angle.

That is, the pressing ends (45b) are connected obliquely from the inside to the outside in the clockwise direction, so that the pressing ends (45b) are arranged in a similar spiral, and thus the airtight nut (50) is tightened to the fixing bolt (40). When the pressure end (45b) is retracted inward toward the tightening direction, the inner airtight end (45a) is contracted so that the airtight end (45a) is in close contact with the outer circumferential surface of the cable (30), so that the cable (30) and The gap between the fixing bolts 40 may be more hermetically filled to improve the waterproof performance.

The LED module 20 of this configuration has excellent heat dissipation performance because the PCB 22 is in close contact with the head body 10 directly (or via the heat conductive sealing adhesive layer 25 ), and a sealing sheet separate from the translucent lens 26 . By (23a), the entire PCB 22 is hermetically protected, so that the waterproof performance is excellent.

Further, the LED module 20,

a heat conduction sheet 21 mounted on one surface of the head body 10;

a metal PCB 22 laminated on one surface of the heat conductive sheet 21 and provided with the LED element 22a;

and a sealing sheet (23a) stacked on one surface of the PCB (22) and having a fitting hole (23a) through which the LED element (22a) is inserted.

The heat conduction sheet 21 increases the heat conduction between the PCB 22 and the head body 10 so that the PCB 22 is cooled through the heat dissipation part 13 of the head body 10, representatively A graphite sheet may be used.

The sealing sheet 23a is a soft sheet made of a material such as silicone or epoxy, and a fitting hole 23a through which the LED element 22a is inserted and exposed at a position corresponding to the LED element 22a of the PCB 22 . ) is provided.

At this time, the fitting hole 23a is perforated to have a larger width (area) than the LED element 22a.

Specifically, the manufacturing method of the LED module 20 will be described.

a) laminating a metal PCB 22 provided with an LED element 22a on one surface of the heat conductive sheet 21;

b) laminating a sealing sheet 23a having a fitting hole 23a through which the LED element 22a is inserted on one surface of the PCB 22;

The fitting hole 23a is perforated to have a larger width than the LED element 22a, and in the step b), vacuum, heat and pressure are applied to the sealing sheet 23a so that the fitting hole 23a is contracted while the LED It is fitted and fixed to the outer end of the element 22a.

Conventionally, the front surface of the PCB 22 is completely covered with a transparent sealing member for waterproofing the front surface of the PCB 22 provided with the LED element 22a, but in this case, the color, temperature, and wide angle of the light are not constant. Not only that, there was a problem in that the quality of light was deteriorated due to severe consumption of light.

Accordingly, the present invention solves the above problem by allowing the sealing sheet 23a to be laminated while covering the entire surface of the PCB 22 except for the light emitting portion of the LED element 22a through the fitting hole 23a,

At this time, since it is practically impossible to drill the fitting hole 23a to have exactly the same width as the LED element 22a, the fitting hole 23a having a larger width than the LED element 22a is first drilled, and then the sealing sheet 23a. As the fitting hole 23a into which the LED element 22a is inserted is contracted (expansion of the sealing sheet 23a) using its own material properties, the inner end of the fitting hole 23a is precisely positioned at the outer end of the LED element 22a. By matching, it is possible to prevent deterioration of light quality and at the same time ensure waterproof performance through the sealing sheet 23a.

To this end, the sheet laminate in which the PCB 22 and the sealing sheet 23a are laminated is placed on a jig or the like, and a predetermined heat (H) and pressure (P) are applied to the sealing sheet 23a in an airtight state with a cover. When a vacuum (V, negative pressure) is applied to the inside of the cover, the fitting hole 23a is contracted, and the sealing sheet 23a is accurately adhered to the outer end of the LED element 22a.

And the LED module 20 is laminated on one surface of the sealing sheet 23a, and includes a reflective sheet 24 having an exposed hole corresponding to the fitting hole 23a.

The reflective sheet 24 has a reflective layer coated on the front surface or a reflective tape attached thereto, so that the light emitted from the LED element 22a is widely diffused forward to be irradiated.

In the present invention, since the fitting hole 23a exactly matches the LED element 22a by the above-described manufacturing method, the exposure hole of the reflective sheet 24 does not have to exactly match the width of the LED element 22a.

In addition, the LED module 20 includes a sealing adhesive layer 25 formed between one surface of the head body 10 and the other surface of the heat conductive sheet 21 to fix the LED module 20 .

The sealing adhesive layer 25 is formed due to the difference in hardness between the head body 10 of high hardness and the heat conductive sheet 21 of low hardness. Although it is illustrated as being formed as a separate layer between the one surface of (10) and the heat-conducting sheet 21, it should be understood that it is formed integrally with the contact surface of the head body 10 and the heat-conducting sheet 21, and if necessary, heat conduction for a metal material It may be formed by adding an adhesive or adhesive tape.

Furthermore, the LED module 20 may further include a light-transmitting lens 26 coupled to the head body 10 while covering the sealing sheet 23a or the reflective sheet 24 .

The light-transmitting lens 26 has a dome portion 26a in which the LED element 22a is accommodated, and has the same size as the metal PCB 22. it is preferable

In the above description of the present invention, with reference to the accompanying drawings, the street lamp head has been mainly described, but various modifications, changes and substitutions are possible by those skilled in the art, and these modifications, changes and substitutions fall within the protection scope of the present invention. should be interpreted as

10: head body 11: mounting part
12: connection hole 13: heat dissipation part
14: coating layer 20: LED module
21: heat conduction sheet 22: PCB
23: sealing sheet 24: reflective sheet
25: sealing adhesive layer 26: light transmitting lens
30: cable 31: sheath
32: conductor 33: connection port
40: fixing bolt 41: first male thread
42: second male thread 43: first hollow part
44 ; Airtight Adhesive 45: Tightening
50: airtight nut 51: second female thread
52: second hollow part

Claims (4)

In the street lamp head comprising a PCB of an LED module mounted on one surface of the head body, and a cable inserted into the other surface of the head body and connected to the PCB,
a connection hole formed through the head body and having a first female thread on an inner circumferential surface;
a cable whose end is inserted into the connection hole to be connected to the terminal unit of the PCB;
A fixing bolt through which the cable is inserted through, and having a first male thread screw-coupled to the first female thread to fix the cable, and a fixing bolt having a second male thread spaced apart from the rear end of the first male thread ; and
and a sealing nut through which the cable is fitted through, and a second female thread screwed to the second male thread to seal the gap between the cable and the fixing bolt.
The method of claim 1,
A street lamp head comprising a; airtight adhesive applied along the edge of the connection hole to which the fixing bolt is screwed to seal the gap between the connection hole and the fixing bolt.
3. The method according to claim 1 or 2,
The fixing bolt includes a tightening part having an airtight end protruding inward from the rear end side of the second male thread with a soft material,
When the airtight nut is screwed to the second male thread of the fixing bolt, the airtight end of the tightening part is tightened inwardly by the airtight nut to be in close contact with the outer circumferential surface of the cable.
4. The method of claim 3,
The tightening unit further includes a plurality of pressing ends arranged to be spaced apart from each other by a predetermined distance in a radial direction in the circumferential direction of the airtight end,
The plurality of airtight ends are inclined at a predetermined angle toward the tightening direction of the airtight nut.

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