JPS6345687Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to an underwater lighting device that requires high watertightness, especially an underwater lighting device for deep sea use.

[Prior art]

FIG. 1 is a sectional view showing a part of a conventional underwater lighting device, and FIG. 2 is a perspective view of a waterproof packing. In the figure, 1 is a lighting device main body, which has an outward flange 1a at an open end. 2 is a lamp socket provided in this main body, 3 is a lamp attached to this lamp socket, 4 is a glove attached to the open end of main body 1 so as to cover this lamp, and an outward facing end facing flange 1a is attached to the open end. Flange 4a
has. 5 is a soft waterproof gasket having a U-shaped cross section that covers this flange 4a from three sides, 6 is a tightening ring that overlaps the flange 4a of the glove 4 with the flange 1a of the main body 1 via this waterproof gasket, and 7 is a tightening ring that is fastened to the flange 1a. This is a tightening bolt that is screwed onto the attachment ring 6.

In the underwater lighting device configured as described above, a waterproof gasket 5 is attached to the flange 4a of the globe 4.
Fit the flange 1 of the main body 1 by sandwiching it.
A and the tightening ring 6 are superimposed, and the plurality of tightening bolts 7
By tightening with even force, water ingress is prevented.

However, in the conventional underwater lighting equipment configured as described above, when tightening several tightening bolts 7, it is difficult to tighten the tightening ring 6 uniformly, and the uneven surface of the flange 4a of the globe 4 Since this cannot be absorbed by the soft waterproof packing 5, a biased tightening force is applied to the flange 4a of the glove 4, resulting in damage to the glass glove 4. Furthermore, Patent No. 121677 shows a method in which the tightening ring 6 is screwed onto both sides of the flange 4a of the glove 4 by sandwiching gaskets, but the unevenness on the surface of the flange 4a cannot be absorbed by the gaskets. I had similar shortcomings.

[Summary of the idea]

This idea was made with the purpose of eliminating the drawbacks of the conventional ones as described above. A globe is attached to the opening of the lighting equipment body through a waterproof gasket, and the flange of this globe is inserted from the outside through a spacer ring. We propose an underwater lighting device that can tighten the glove with even force by screwing the tightening ring onto the outer periphery of the main body in a pressing manner to prevent damage.

[Example of idea]

FIG. 3 is a sectional view showing a part of an underwater lighting device according to an embodiment of the invention, and FIG. 4 is a perspective view of a spacer ring.
The same reference numerals as in the figures indicate the same or corresponding parts. The flange 1a of the lighting fixture body 1 is provided with an annular groove 1b on the surface facing the globe 4, and
A threaded portion 1c is formed on the outer periphery, and an annular waterproof packing (O-ring) 8 is inserted into the groove 1b.
The flange 4a of the glass globe 4 has an inclined surface on the side opposite to the main body 1, and a tightening ring 6 is inserted from the outside through an annular spacer ring 9.
is pressed against the main body 1 by. The tightening ring 6 is screwed to a threaded portion 1c on the outer periphery of the flange 1a of the main body 1 by a threaded portion 6a formed on the inner periphery of an L-shaped cross section. The spacer ring 9 is molded from an elastically deformable hard resin so as to have an inclined surface corresponding to the inclined surface of the flange 4a, and has an oblique slot 10 in a part thereof.

In the underwater lighting device configured as described above, the waterproof gasket 8 is inserted into the groove 1b of the flange 1a of the main body 1, the flange 4a of the globe 4 is overlapped, and the spacer ring 9 is inserted from the outside of the flange 4a.
The globe 4 is attached to the main body 1 by screwing the tightening ring 6 onto the flange 1a and tightening it. In the attached state, the glove 4 is pressed against the main body 1 by the tightening ring 6 and made watertight by the waterproof gasket 8. At this time, since the tightening ring 6 is screwed in such a way that it is pressed from the outside via the spacer ring 9 made of an elastically deformable hard resin, an even tightening force is applied to the flange 4a, and the flange 4a has unevenness. If the spacer ring 9 is deformed by the slots 10, a uniform tightening force is applied, and a watertight state is uniformly formed. Furthermore, when the globe 4 is molded, uneven thickness tends to occur where the wall thickness gradually changes around the entire circumference of the flange 4a. However, in the spacer ring 9 with the slots 10 in the diagonal direction, one of the slots 10 in the unevenly thick part of the flange 4a is tightened by the rotation of the tightening ring 6. The other side stays at the thicker part, and in this way, they overlap and fit in a shifted state at the slot 10 part, and a uniform clamping force is applied over the entire circumference of the flange 4a. As a result, the glove 4 is tightened to the main body 1 through the waterproof gasket 8 with a uniform tightening force (for example, 50 kg/cm ² ), thereby eliminating damage to the glove 4.

In addition, in the above embodiment, the flange 1 is attached to the main body 1.
Although we have described the case of forming flange 1
The tightening ring 6 may be directly screwed onto the main body 1 without forming the a. Furthermore, the present invention is applicable not only to deep sea lighting equipment but also to general underwater lighting equipment.

[Effect of idea]

As explained above, the present invention involves attaching a globe to the opening of the lighting equipment body via a waterproof packing, and elastically deforming the flange of the globe from the outside by having an inclined surface and slot corresponding to the inclined surface of the flange. Since the tightening ring is screwed onto the outer periphery of the main body so as to be pressed through a spacer ring made of hard resin, the glove can be tightened with uniform force to maintain a high degree of watertightness and prevent damage to the flange. There is an effect that can be achieved.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a part of a conventional underwater lighting device, FIG. 2 is a perspective view of its waterproof packing, and FIG. 3 is a sectional view showing a part of an underwater lighting device according to an embodiment of the invention. FIG. 4 is a perspective view of the spacer ring. In each figure, the same reference numerals indicate the same or equivalent parts, 1...Lighting device body, 2...Lamp socket, 3...Lamp, 4...Glove, 6...Tightening ring, 8...Waterproof gasket, 9 ...This is a spacer ring.

Claims (1)

[Scope of utility model registration request] A lighting equipment main body, an annular waterproof gasket inserted into a groove provided in the flange of the main body, a lamp socket provided in the main body, a lamp attached to the lamp socket, and the waterproof gasket attached to the opening of the main body so as to cover the lamp. A globe that is attached through a flange and has a flange formed with an inclined surface on the opposite side from the main body, and a fastener that is screwed onto the outer periphery of the main body so as to press the flange of this globe from the outside through a spacer ring. 1. An underwater lighting fixture comprising a ring, the spacer ring being molded from an elastically deformable hard resin so as to have an inclined surface corresponding to the inclined surface of the flange, and having a diagonal slot in a part thereof.