JP2008071651A - Waterproof structure for underwater lighting case - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a waterproof structure for an underwater lighting case that achieves improvement in water-tightness. <P>SOLUTION: An O-ring fitting groove 3c having a nearly U-shaped cross-section in a side-view is formed at the outer peripheral part 3a of a case lid 3. A concave stepped part 2c, into which the outer peripheral part 3a of the case lid 3 is fittable together with an O-ring 8, is formed at the depth side of a front opening 2a of a case body 2. A female-screw part 2d, into which a male-screw part 4a of a case lid fixing ring 4 is screwed, is formed on the front side of the front opening 2a. The male-screw part 4a of the case lid fixing ring 4 is screwed into the female-screw part 2d of the case body 2. Consequently, the outer peripheral part 3a of the case lid 3 is fixed to the bottom face 2f of the concave stepped part 2c while pressing the outer peripheral part of the case lid against the bottom face of the concave stepped part. Simultaneously, the O-ring fitting groove 2c is narrowed by bending the outer peripheral part 3a in a screwing-in direction. Accordingly, the O-ring 8 is brought into pressure contact with an outer peripheral face 2g of the concave stepped part 2c while pushing out the O-ring 8 in an outer peripheral direction. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a waterproof structure for an underwater lighting case.

  Conventionally, a case main body (illumination unit main body) containing an LED (light emitting diode) is made to penetrate through a through hole in a side wall of a bathtub in a watertight state, and the front opening of the case main body is made of a transparent synthetic resin capable of watertightly closing There is a case where the case lid (diffusion plate) is exposed to the water in the bathtub, and the LED is used to illuminate the water in the bathtub through the case lid (see Patent Document 1).

In Patent Document 1, the case lid is fixed to the case body by screwing the male screw portion of the case lid into the female thread portion of the case body, and at the same time, the case cover is sandwiched between the case ring and the flange of the case body. The front opening of the main body can be closed watertight.
JP 2004-265653 A

  However, while screwing the male screw part of the case lid into the female screw part of the case body, the front opening of the case body is closed in a watertight manner by sandwiching the O-ring of the case lid between the flange of the case body. As the case lid is screwed in, a torsional force acts on the O-ring and the O-ring is likely to be distorted, resulting in a problem of poor watertightness (waterproofness).

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a waterproof structure for an underwater lighting case with improved water tightness.

  In order to solve the above-described problems, the present invention includes a case main body in which a lighting fixture is housed, and a case cover made of a transparent synthetic resin capable of watertightly closing a front opening of the case main body, and at least the case cover An underwater lighting case waterproof structure in which a part is exposed to water and illuminates the water through a case lid with a lighting fixture, and an O-ring having a substantially U-shaped cross section in a side view on the outer periphery of the case lid A fitting groove is formed, and a recessed step portion in which the outer periphery of the case lid can be fitted together with an O-ring is formed on the back side of the front opening of the case body, and a case lid fixing ring is formed on the front side of the front opening. When the external thread part of the case lid fixing ring is screwed into the internal thread part of the case body, the outer peripheral part of the case cover is pressed and fixed to the bottom surface of the recessed step part. In some cases, the outer peripheral portion is bent in the screwing direction to narrow the O-ring fitting groove so that the O-ring is pressed against the outer peripheral surface of the concave step portion while being pushed out in the outer peripheral direction. A waterproof structure is provided.

  As in claim 2, the case main body is penetrated through a through hole in a side wall of a bathtub or the like in a watertight state, a portion of the case lid is exposed to the water in the bathtub, It can be set as the structure which illuminates the water in a bathtub through a certain lens.

  According to the present invention, by screwing the male screw portion of the case lid fixing ring into the female screw portion of the case body, the outer peripheral portion of the case lid can be pressed and fixed to the bottom surface of the concave step portion. At the same time, the outer periphery of the case lid is bent in the screwing direction by screwing the case lid fixing ring, and the O-ring fitting groove is narrowed, so that the O-ring is pushed out in the outer peripheral direction and strongly pressed against the outer peripheral surface of the concave stepped portion. Since the torsional force accompanying the screwing of the case lid as in the background art does not act on the O-ring, the O-ring is less likely to be distorted and the watertightness (waterproofness) is improved.

  According to the second aspect, the LED can illuminate the water in the bathtub through the lens.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.

  FIG. 1A is an exploded perspective view of the underwater lighting case 1, and FIG. 1B is an assembled perspective view of the underwater lighting case 1. FIG. 2 is a cross-sectional view of the underwater lighting case 1 attached to the side wall 10 a of the bathtub 10. 3 (a) and 3 (b) are enlarged views of main parts of FIG.

  The underwater lighting case 1 includes a case body 2, a case lid 3, a case lid fixing ring 4, a decorative cover 5, a waterproof packing 6, a case body fixing ring 7, an O ring 8, and an LED (light emitting diode) block 9. Has been.

  The case body 2 is formed of a synthetic resin into a cylindrical shape, and a flange 2b is formed at the front end on the front opening 2a side. A concave step 2c is formed on the back side of the front opening 2a of the case body 2 so that the outer peripheral portion 3a of the case lid 3 can be fitted together with the O-ring 8, and a case lid fixing ring is provided on the front side of the front opening 2a. A female screw portion 2d for screwing the four male screw portions 4a is formed.

  An LED block (lighting fixture) 9 is accommodated inside the case body 2, and the LED block 9 is supplied with power from a lead wire 9 a, so that the LED emits light and passes through the case lid 3 to tub 10. Illuminates the underwater inside.

  The case lid 3 is formed of a transparent synthetic resin into a bottomed cylindrical shape, and closes the front opening 2a of the case body 2 in a watertight manner. The front surface portion 3b of the case lid 3 functions as a lens such as diffusion.

  An O-ring fitting groove 3c having a substantially U-shaped cross section in a side view is formed in the outer periphery 3a of the case lid 3, and the O-ring 8 is fitted into the O-ring fitting groove 3c.

  The underwater lighting case 1 composed of the above-described components can be assembled as follows.

  After housing the LED block (lighting fixture) 9 in the case body 2 from the front opening 2a and positioning it with the positioning protrusion 2e, the outer peripheral portion 3a of the case lid 3 from the front opening 2a as shown in FIG. Is fitted together with the O-ring 8 into the recessed step 2c. Thereafter, the male threaded portion 4a of the case lid fixing ring 4 is screwed into the female threaded portion 2d of the case main body 2, so that the outer peripheral portion 3a of the case lid 3 is made to be the concave step portion 2c of the case main body 2 as shown in FIG. The bottom surface 2f is pressed and fixed.

  At the same time, the case lid fixing ring 4 is further strongly screwed into the case body 2, so that the outer peripheral portion 3 a of the case lid 3 is bent in the screwing direction (see arrow a) by the case lid fixing ring 4.

  Thereby, since the O-ring fitting groove 3c is narrowed, the O-ring 8 is pushed out in the outer peripheral direction (see arrow b), and comes into strong pressure contact with the outer peripheral surface 2g of the concave step portion 2c.

  The underwater lighting case 1 assembled in this way can be attached to the side wall 10a of the bathtub 10 as follows.

  The waterproof packing 6 is fitted into a through-hole 10b formed in the side wall 10a of the bathtub 10 in advance, and the case body 2 is fitted into the center hole 6a of the waterproof packing 6 with the flange 2b facing the inside of the bathtub 10, When the internal thread 7a of the case body fixing ring 7 is screwed into the external thread 2h of the case body 2 from the outside of the bathtub 10, the waterproof packing 6 is sandwiched between the flange 2b of the case body 2 and the case body fixing ring 7. In this state, it can be attached to the side wall 10a of the bathtub 10. Thereafter, the decorative cover 5 is fixed to the flange 2 b of the case body 2.

  In the case of the waterproof structure of the underwater lighting case 1 as described above, the outer threaded portion 4a of the case lid 3 is screwed into the female threaded portion 2d of the case main body 2 so that the outer peripheral portion 3a of the case lid 3 is recessed into the recessed step portion 2c. The bottom surface 2f can be pressed down and fixed.

  At the same time, the outer periphery 3a of the case lid 3 is bent in the screwing direction by screwing the case lid fixing ring 4 to narrow the O-ring fitting groove 3c, so that the outer periphery of the concave step portion 2c is pushed out while pushing out the O-ring 8 in the outer peripheral direction. Since it is strongly pressed against the surface 2g, the torsional force accompanying the screwing of the case lid as in the background art does not act on the O-ring 8, so that the O-ring 8 is less likely to be distorted and the water tightness (waterproofness) is improved. To come.

  In the said embodiment, although the LED block 9 was used as a lighting fixture, it is also possible to use another lighting fixture.

  In the above embodiment, the underwater lighting case 1 is attached to the side wall 10a of the bathtub 10 and at least the portion of the case lid 3 is exposed to the water. However, the entire underwater lighting case 1 is underwater such as a pool or a fountain. It can also be applied to the type installed in.

It is the underwater illumination case which concerns on embodiment of this invention, (a) is a disassembled perspective view, (b) is an assembly perspective view. It is sectional drawing which attached the underwater lighting case of FIG. 1 to the side wall of the bathtub. (A) and (b) are the principal part enlarged views of FIG. 2, respectively.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Underwater lighting case 2 Case main body 2a Front opening 2b Flange 2c Concave step part 2d Female thread part 2f Bottom face 2g Outer peripheral surface 3 Case cover 3a Outer peripheral part 3c O-ring fitting groove 4 Case cover fixing ring 4a Male thread part 8 O-ring 9 LED block (lighting equipment)
10 Bathtub 10a Side wall 10b Through hole

Claims (2)

A case body containing a lighting fixture inside and a case cover made of a transparent synthetic resin capable of watertightly closing the front opening of the case main body, and at least a portion of the case lid is exposed to the water. A waterproof structure for an underwater lighting case that illuminates the water through a lid,
An O-ring fitting groove having a substantially U-shaped cross section in a side view is formed in the outer periphery of the case lid, and the outer periphery of the case lid can be fitted together with the O-ring on the back side of the front opening of the case body. A concave step is formed, and a female screw part for screwing the male screw part of the case lid fixing ring is formed on the front side of the front opening, and the male screw part of the case cover fixing ring is screwed into the female screw part of the case body At the same time, the outer periphery of the case lid is pressed and fixed to the bottom surface of the concave step portion, and at the same time, the outer peripheral portion is bent in the screwing direction to narrow the O-ring fitting groove, thereby pushing out the O-ring in the outer peripheral direction. A waterproof structure for an underwater lighting case, wherein the outer peripheral surface of the underwater lighting case is press-contacted.   The case body is penetrated through a through hole in a side wall of a bathtub or the like in a watertight state, a portion of the case lid is exposed to the water in the bathtub, and the LED which is a lighting fixture is passed through a lens which is a case lid. The underwater illumination case waterproof structure according to claim 1, wherein the underwater illumination case is illuminated.

Images