JP3121305U - Waterproof structure at the end of the tubular case - Google Patents

Abstract

An object of the present invention is to provide a linear light source that eliminates the entry and exit of moisture into a tubular case, protects LEDs that are sensitive to moisture, and has a long life.
SOLUTION: A recess is provided on the outer peripheral surface of a sealing plug to be inserted into an end portion of a tubular case, and a filler is injected into a space formed by the recess and the inner surface of the tubular case from a hole provided on the outer surface of the sealing plug. Then, a tubular case having a structure for discharging the air in the space portion from a groove or hole of the sealing plug formed separately is formed, and the outside is covered with a waterproof case to form a waterproof structure.
[Selection] Figure 1

Description

  The present invention relates to a waterproof structure at a tube end portion of a tubular light-emitting body that houses an LED module as a light source. By storing a plurality of LEDs as a light source, a compact linear waterproof light source can be obtained.

  A compact LED linear light source is difficult to use as a general illumination light source because of its small amount of light, but is used as a sign / display light source for display because of its high brightness, small size, and light weight. Especially when used as indoor and outdoor line lighting, the outline of the building emerges at night and has the effect of creating a beautiful night view. In particular, in order to use the LED outdoors, it is necessary to have a strong waterproof performance.

  According to Patent Document 1, a waterproof terminal structure for an optical cable is shown. According to this, a structure is described in which an adhesive is injected from an adhesive injection hole formed in a side surface of a shell (corresponding to a tubular case) into which a cable is inserted to seal the inner surface of the shell and the outer surface of the cable.

  In this structure, the adhesive injection hole of the shell is opened at right angles to the cable insertion direction. For this reason, it is difficult to make an adhesive injection hole in the shell by a simple shell extrusion process, and a complicated mold structure is required. In particular, a mold cost increases when a long shell is manufactured. Therefore, it is usually necessary to perform the process in a separate process, resulting in a problem of high cost.

  In addition, the injected adhesive penetrates into the gap between the shell inner surface and the cable outer surface, but air is trapped at the sealed end, and the adhesive does not reach the end, resulting in problems such as loss of waterproofing and reduced strength. .

  Patent Document 2 describes the structure of a tube material that inserts and joins an outer tube and an inner tube. When joining these pipe materials, a space is provided on the contact surface between the two, and an adhesive injection port communicating with the space is provided in the outer tube. As the adhesive is injected, the air in the space is discharged to the outside. The structure is described.

In this structure, the adhesive injection port is opened at right angles to the insertion direction of the outer tube and the inner tube. For this reason, the adhesive injection port must be opened in a separate process from the manufacture of the pipe, and the annular recess serving as the adhesive filling section must be processed in a separate process, and the parts are difficult to swing during processing. In addition, an elastic porous member is used to discharge the air in the adhesive filling space, but there is a problem that the entire length varies due to the pushing force of the tube.
JP 2004-309981 A JP-A-2005-256349

  Ensure that the waterproof structure of the end of the tubular case can be achieved reliably and inexpensively. This eliminates the entry and exit of moisture into the tubular case, protects the LEDs that are vulnerable to moisture, and provides a long-life linear light source.

  When injecting the filler into the space of the tubular case and the sealing plug, airtightness is obtained without generating bubbles in the filling part, and the filler injection hole is provided in the same direction as the insertion direction of the sealing plug. There is a need to improve the workability of filler filling.

  In order to solve the above-described problem, a tunnel communicating with the outer surface of the sealing plug surface that does not contact the hollow space of the sealing plug and the tubular case is provided in advance on the outer surface of the sealing plug surface, and this is inserted into the tubular case, Filler is injected from the injection hole on the outer surface of the sealing plug. As a result, the inside and outside of the tubular case are hermetically sealed by the sealing plug.

  In addition to the injection hole, the sealing plug is provided with an exhaust groove or an exhaust hole connected to the hollow space and the outer surface of the tubular case. Thus, when the filler is injected from the injection hole, the filler quickly flows into the hollow space and the air in the hollow space is discharged to the outside, so that a reliable airtightness is obtained without generating bubbles in the filler. be able to.

  Covering at least one end of the tubular case end including the sealing plug through which the wire penetrates with a cover in consideration of the case where the sealing is not sufficient only by sealing the tubular end with the sealing plug. Fill the gap with the stopper with a filler to strengthen the waterproof structure.

  In addition, an elastic packing is attached to the end portion of the tubular case center side of the sealing plug independently of the filler to reinforce the waterproof structure.

  The waterproof structure at the end of the tubular case of the present invention processes only the sealing plug, and both are sealed without special processing on the tubular case, so that reliable and inexpensive waterproof performance can be obtained.

  Filler can be injected from the injection hole provided on the outer surface of the sealing plug, and air is injected during injection of the filler from the exhaust groove or exhaust hole provided in the sealing plug. improves.

  The tubular case end is sealed with a sealing plug, covered with a waterproof cover, and the gap is filled with a filler to enhance waterproofing. Further, the sealing case has an elastic packing independent of the filler at the central end of the tubular case. With the structure of mounting, the reliability of airtightness is further increased, deterioration due to moisture, which is one of the weak points of LEDs, can be greatly reduced, and a long-life LED module tubular light emitter can be obtained.

  By using a foaming material as the filler, the joining with the tubular case, the sealing plug, and the waterproof cover is ensured to every corner, and the sealing structure is further improved.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows a plan view and a front view of a preferred embodiment of a waterproof structure for an end of a tubular case according to the present invention. FIG. 2 shows a plan view and a front view showing an assembling procedure of the tubular case end before attaching the waterproof cover of the embodiment of FIG. FIG. 3 shows a plan view and a front view showing a procedure for covering the end of the tubular case of FIG. 2 with a waterproof cover. FIG. 4 shows a circuit diagram in which LEDs are connected in series and parallel.

The plan view of FIG. 1 shows an overall cross-sectional view, and a part of the lead line portion is shown in a partial cross-sectional view. In this illuminator, a socket 13 is connected to the metal circuit conductor 12, an LED 14 and a resistor are attached to the socket 13 where necessary, and a surge absorber 16 is connected to the power inlet side. The LED module tubular illuminator is connected to the lead wire 11 and accommodated in the tubular case 4, and both ends of the tubular case 4 are sealed with sealing plugs 1, 1 ′. Further, waterproof covers 2 and 2 'are attached to both ends to form a waterproof structure.
The parts related to the first waterproof structure are the sealing plugs 1, 1 ′, the tubular case 4, the recesses 3, 3 ′, and the fillers A6, 6 ′. The parts related to the second waterproof structure are elastic packings 8 and 8 '. The parts related to the third waterproof structure are waterproof covers 2, 2 'and fillers B9, 9'.

  FIG. 2 is a plan view and a front view relating to the first waterproof structure. The tubular light emitter of the LED module is inserted into the tubular case 4, and the filler A 6 is injected from the filler A injection hole 7 into the recess 3 formed by the sealing plug 1 and the tubular case 4. At this time, the space formed by the recess 3 and the tubular case inner surface 5 is sealed with a filler. The flow at the time of filling with the filler A6 flows from the filler A injection hole 7 through the tunnel portion of the sealing plug 1 to the recess 3 as shown by a → b → b ′ → c in the front view. After going around, go to c through the exhaust groove. A similar effect can be obtained by providing an exhaust hole instead of the exhaust groove. In addition, before inserting the sealing plug 1 into the tubular case 4, the elastic packing 8 is fitted into the sealing plug 1 so that the peak portion in contact with the inner surface 5 of the tubular case comes to the center side of the tubular case, thereby forming a second waterproof structure. It is good to do so. Thus, by using a small-sized sealing plug that is hermetically sealed with a filler at the end of the tubular case, the waterproof tubular of the highly reliable LED module that has good workability, is inexpensive, and is long and airtight. A luminous body is obtained. Of course, the same effect can be obtained even if the elastic packing 8 is integrated by using a sealing plug having elasticity and the elastic packing is omitted.

  FIG. 3 shows a structure in which the waterproof performance is further enhanced by covering the end of the tubular case having the waterproof structure assembled in FIG. 2 with a waterproof cover A. In this case, the waterproof cover A2 is inserted into the end of the tubular case, and the filler B is injected from the filler B injection hole. The filler B fills the space between the waterproof cover and the tubular case, and fills a small gap formed between the tubular case and the waterproof cover while exhausting air. In order to keep the inside of the tubular case 4 airtight, the O-ring 17 is fitted to the lead wire, and the O-ring is pushed into the sealing plug by the convex portion formed on the inner surface of the waterproof cover A2, which keeps the waterproof and also serves as a retainer. .

  By providing the stopper 18 on the lead wire 11, no tension is applied to the connection point of the metal circuit conductor 12 due to the pull of the lead wire 11, so safety can be improved.

  As the filler, an adhesive having an appropriate viscosity may be selected from fluid adhesives such as acrylic and silicone.

  The double-sided tape 20 is used for temporary fixing when positioning the tubular light emitter of the LED module in a building or the like.

  Although FIG. 1 illustrates the light emitter with the lead wire attached to only one side, the same structure can be applied to the tubular light emitter of the LED module with the lead wire provided on both sides for feeding.

  The present invention is used for a tubular light emitter of an LED module having a waterproof structure required for indoor / outdoor lighting in the field of sign display such as architectural line lighting, contour lighting, and amusement hall.

The top view and front view of the suitable Example of the waterproof structure of the tubular case edge part based on this invention. The top view and front view which show the procedure which inserts a sealing stopper in a tubular case and comprises a 1st waterproof structure. The top view and front view which show the procedure which comprises a 3rd waterproof structure in the tubular case which comprised the 1st waterproof structure. An example of the circuit used for the tubular light-emitting body of the LED module which has a waterproof structure is shown.

Explanation of symbols

1, 1 'sealing plug A
2, 2 'waterproof cover A
3, 3 'hollow 4 tubular case 5 tubular case inner surface 6, 6' filler A
7 Filling material A injection hole 8, 8 'Elastic packing 9, 9' Filling material B
10 exhaust groove 11 lead wire 12 metal circuit conductor 13 socket 14 LED
15 Resistor storage hole 16 Surge absorber 17 O-ring 18 Stopper 19 Filler B injection hole 20 Double-sided tape

Claims (6)

At least one end of the tubular LED module is provided with a sealing plug having an electric wire through hole in close contact with the inner surface of the tubular case at the end of the tubular case, and the outer periphery of the sealing plug at the outer surface end of the sealing plug A waterproof structure for an end portion of a tubular case, wherein a hole is provided in the middle so as to communicate with a recess extending over the entire circumference, and a structure is formed in which a filler is injected from the hole into the recess. The exhaust groove or the exhaust hole is provided in the other end portion of the injection hole so that the gas in the recess is pushed out when the filler is injected into the recess. The waterproof structure of the tubular case end described in 1. 3. The tubular according to claim 1, wherein a second waterproof sealing portion is formed by attaching an elastic packing over the entire circumference of the sealing plug portion closer to the tubular central portion than the recess. Waterproof structure at the end of the case. There is a filler injection hole for covering at least one end of the tubular case end hermetically sealed with a filler with a cover having a wire through hole and filling a gap between the cover and the case and the sealing plug with the filler. The waterproof structure for the end of the tubular case according to any one of claims 1 to 3, wherein a third waterproof sealing portion is provided. 5. The waterproof structure of the tubular case end according to claim 1, wherein the filler forming the waterproof structure at the end of the tubular case has foaming properties. 6. The waterproof structure of the tubular case end portion according to claim 1, wherein the sealing plug is made of an elastic material.

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