JPS6332201B2 - - Google Patents

Description

Detailed Description of the Invention (Technical Field) The present invention relates to an underwater lamp that can withstand use under high water pressure, and particularly to an underwater lamp that has an improved holding structure between the opening of the lamp house of such an underwater lamp and the lamp. Regarding lights.

(Background technology) Underwater lights are generally used as fishing lights for fishing or underwater work lights by suspending a lamp house underwater using a cable from a ship and lighting a lamp fitted into a socket inside the lamp house. say something Since underwater lamps are used underwater, the inside of the lamp house must be insulated from water.

Various proposals have been made regarding structures for holding the lamp and the opening of the lamp house of the underwater lamp.

For example, in Utility Model Publication No. 54-4863, "Underwater Lamp Holder," a donut-shaped packing 22 made of an elastic material is arranged around the outer periphery of the cylindrical part of the light bulb, and flanged plates 23 and 24 are connected to both the upper and lower surfaces of the packing. However, a structure is shown in which the seal 22 expands in the diametrical direction by tightening the flanged plates 23 and 24 in the axial direction to maintain a watertight state (see FIG. 5). but,
With this structure, when water pressure increases, slippage can occur between the seal and the cylindrical surface of the bulb, potentially damaging the bulb and socket. In addition, because the structure cannot absorb manufacturing errors in the volume of the packing, the amount of tightening of the packing must be adjusted manually; if the tightening is too strong, the internal stress of the packing becomes too high, which may damage the bulb. If the tightening is too weak, it will be difficult to handle as it will succumb to the water pressure and cause water to leak.

In addition, in Utility Model Application Publication No. 58-152710 "Underwater Lamp Holder", there is a step 31 on the periphery of the proximal end of the tube where the cap has a small diameter.
A ring 35 made of an elastic material is attached to tightly contact the upper edge of the stepped portion of the light bulb as a holder for watertightly storing the light bulb 31 in a hollow case, and the ring 35 is positioned on the upper edge of the ring. Inward protrusion 33
an upper ring body 33 having a shape, a case body, and a lower ring body 34 that is pressed upward from the lower end and tightened;
An annular packing 32 made of an annular elastic body is provided between an upper annular body 33 and a lower annular body 34, and by tightening both annular bodies 33 and 34, the annular packing 32 is expanded inward. A structure is shown in which the light bulb is pressed against the outer periphery of the stepped portion of the light bulb (see FIG. 6). However, in this structure, the ring 35 and the stepped portion 3
1a is in line contact, stress is concentrated, so when the water pressure increases, the ring 35 deforms, and the inward protrusion 33a of the upper ring 33 comes into direct metal contact with the light bulb 31, causing the light bulb 31 to break due to the concentrated stress. Or,
Further, since the light bulb 31 is pushed and moved in the axial direction by a large amount due to water pressure, there is a risk of damaging the light bulb cap or socket. In addition, since the stepped portion 31a and the ring 35 are not in full contact, the contact pressure changes depending on the angle of the stepped portion 31a. It must be as close to the axis as possible at right angles,
A contradiction arises in that as the R of the glass step becomes smaller, the strength of the light bulb itself becomes smaller.

Furthermore, in Utility Publication No. 54-39915 ``Underwater Lamp'',
In particular, underwater lamps with a waterproof seal structure for halogen light bulbs are equipped with an auxiliary cap section that has a larger diameter than the main cap section at the junction with the bulb neck section of the cap body section, and this auxiliary cap section connects the lamp body with the auxiliary cap section. A first waterproof sealing member is interposed by pressure between the auxiliary base and the bulb neck, and a second waterproof sealing member is provided at the joint between the auxiliary base and the bulb neck, and these two sealing members are integrally pressed. The structure is shown. However, with this structure, the lower end surface of the sealing member's elastic body comes in contact with seawater over a wide area, so due to the viscoelastic properties of the elastic body, the high pressure that the elastic body receives from the neck of the mouthpiece causes the elastic body to be submerged in the sea. The internal stress of the seal member is less likely to increase due to protrusion. Therefore, it is not possible to effectively prevent the bulb from moving in the axial direction, and force is also applied to the socket, damaging the bulb base and socket, and causing damage to the bulb between the lamp body and the bulb base. It is impossible to design it for use in deep water because the thin wall of the seal will break.

(Objective of the Invention) The object of the present invention is to provide an underwater lamp that can keep the inside of the lamp house watertight even against high water pressure, and that can prevent the lamp from being destroyed due to metal contact between the lamp house and the like. It is about providing.

(Structure of the Invention) In order to achieve the above object, the underwater lamp according to the present invention has a shape in which the neck of the glass container housing the light emitting part has a diameter larger than that of the cylindrical part on the base side and the cylindrical part on the side of the light emitting part. an underwater light emitter formed from a cylindrical part; and an underwater light emitter supporter, the opening of which has an inner diameter that receives the cylindrical part on the base side of the underwater light emitter, and a pressure receiving surface is formed on the end surface. ,
a packing made of an elastic body having an end surface that contacts the pressure-receiving surface, an inner wall having a step that fits the neck of the light emitter, an outer wall, and another end surface corresponding to the end surface; a gasket presser for sealingly closing the underwater light emitting device support container and the neck of the underwater light emitting device by pressing it against the underwater light emitting device support container and the neck of the underwater light emitting device; The relationship between the gap between the cylindrical part and the inner diameter of the packing holder, the gap between the cylindrical part on the light emitting part side of the glass container, and the hardness of the packing is such that when the underwater light emitter is pushed toward the base by water pressure, the inside of the packing is The neck of the underwater light emitter is supported through the internal stress of the packing so that no problem will occur due to protrusion when stress increases.

According to the above structure, the object of the present invention can be completely achieved.

(Example) Hereinafter, the present invention will be described in more detail with reference to the drawings and the like.

Figure 1 shows an embodiment of the underwater lamp according to the present invention, Figure A is a side view, Figure B is a plan view, and Figure 2 shows details of the opening of the lamp house and the holding structure for the lamp. It is a diagram.

The lamp 1 is an underwater light emitting device having a light emitting part housed in a glass container, and uses, for example, a halogen lamp. The lamp 1 includes a light emitting part 1f, a cylindrical part 1a connected to the light emitting part 1f, a base part 1b having a smaller diameter than the diameter of the cylindrical part 1a, and the cylindrical part 1a and the base part 1.
It consists of an inclined part 1c connecting the base part 1b and a base part 1d, and a filament 1e is provided inside the light emitting part 1f.

A base 1d of the lamp 1 is fitted into a socket 3 provided in a lamp house 2. The socket 3 is movable in the axial direction. With this structure, even if the lamp 1 moves in the direction of the socket 3 due to water pressure, the lamp 1 or the socket 3 will not move.
damage can be prevented. The socket 3 is prevented from rotating with respect to the central axis, so that the lamp 1 can be easily fitted into the socket 3.

There are cooling fins 2a on the outer periphery of the lamp house 2.
is provided. The upper part of the lamp house 2 is watertightly sealed by a head 4 via an O-ring 5. A cable 6 is led out from the top of the head 4, and is sealed watertight with a packing holder 8 via packings 7, 7a. The cable 6 is connected to the socket 3 with screws 3a, 3a. There are three guard stays 12 on the opening side of the lamp house 2.
are screwed, and a weight 13 is fixed to the guard stay 12. Guard stay 12
is for protecting the lamp 1 from underwater obstacles and the like. The weight 13 is for quickly sinking the underwater lamp into the water.

Next, the structure of the opening of the lamp house and the lamp holding portion will be explained in more detail with reference to FIG.

The inner diameter of the opening 2b of the lamp house 2 is the same as that of the lamp 1.
Since the outer diameter cannot be made the same as the outer diameter of the base portion 1b, there is a gap.

One end 9a of the gasket 9 is in contact with the end surface of the opening 2b of the lamp house 2. The inside of the gasket 9 is formed with a small diameter inner wall 9b that contacts the base 1b of the lamp 1, a large diameter inner wall 9d that contacts the cylindrical portion 1a of the lamp 1, and an inclined inner wall 9c that contacts the inclined surface 1c of the lamp 1. There is. The outer side of the packing 9 is formed by a cylindrical outer wall 9f having an inclined portion 9e on the other side.

The seal 9 is tightened by fixing the seal holder 10 to the lamp house 2 with screws 11. The packing presser 10 is also the cylindrical part 1 of the lamp 1.
The dimensions are such that there is a gap so that it does not come into contact with a. The external dimensions of the packing 9 are larger than the space formed by the lamp 1, the lamp house 2, and the packing holder 10. Therefore, when the packing holder 10 is tightened and fixed, uniform compressive stress is applied to the packing 9 due to the internal stress generated in the packing 9, so that the packing 9 is evenly adhered to each surface of the lamp 1. Therefore, watertightness can be maintained even if the dimensional accuracy of each surface of the lamp 1 is relatively low. In addition, even if the volume of the packing or the volume of the part where the packing is accommodated changes due to manufacturing errors, the error in volume is automatically corrected by slightly shifting the position of the light bulb in the axial direction. It is easy to tighten the bulb and there is no risk of it being damaged due to excessive stress being applied to the bulb.

Inner diameter of opening 2b of lamp house 2 and lamp 1
The gap between the diameter of the base 1b and the seal presser 1
The relationship between the gap between the inner diameter of 0 and the diameter of the cylindrical portion 1a of the lamp 1 and the hardness of the packing 9 is such that when the lamp 1 is pushed in the direction of the base 1b, a portion of the packing 9 protrudes from each gap. to prevent damage. That is, although it is preferable that each of the gaps be small in terms of accuracy, it is necessary to provide a certain gap in relation to the outer diameter of the lamp 1. For this reason, the packing 9 is designed to have such hardness that it will not protrude from the gap.

Furthermore, when relatively high water pressure is applied to the lamp 1 in the direction of the base, the gasket 9 receives pressure from the inclined portion 1c of the lamp 1 of a magnitude corresponding to the difference in cross-sectional area between the cylindrical portion 1a and the base portion 1b. , the internal stress of the packing 9 increases and it comes into closer contact with the lamp 1. The internal stress of the packing is at the inclined part 1c.
Regardless of the design angle, it is determined only by the difference in cross-sectional area between the cylindrical part 1a and the base part 1b, so the angle of the inclined part 1c can be selected to be the most suitable shape in terms of the strength of the glass, ease of processing, etc. can. According to experiments by the inventors of the present invention, the cylindrical portion 1a of the lamp 1 and the base 1
It has been confirmed that when water pressure is applied from the cylindrical portion 1a side when designed with a diameter ratio of 5:4 to b, the internal stress of the packing 9 is approximately 2.5 to 3 times the water pressure. By arbitrarily designing the ratio of this diameter, the ratio between water pressure and packing internal pressure can be made larger or smaller. In addition, the shape of the gasket 9 is thin and has no notches, and only compressive stress is applied to areas other than the protruding portions, so the gasket 9
There is no fear that it will break.

(Modifications) Various modifications can be made to the embodiments described in detail above within the scope of the present invention.

FIGS. 3 and 4 are diagrams showing in detail a structure for holding the opening of the lamp house according to another embodiment of the present invention.

As shown in FIG. 3, the lamp house 2 is extended in the outer circumferential direction of the packing 9, and the packing holder 10 is pushed in, and the packing 9 is moved into the space formed by the lamp house 2, the neck of the lamp 1, and the packing holder 10. It may also be sealed tightly.

Alternatively, as shown in FIG. 4, a ring 2c may be inserted into the lamp house 2 side, and the gasket 9 may be hermetically closed in the space formed by the ring 2c, the lamp house 2, and the gasket retainer 10. In this case, the ring 2c can be considered part of the lamphouse 2.

In addition, although the above embodiment assumes that the underwater light is used for collecting fish, it can also be used not only for collecting fish but also as an underwater light installed on the seabed or an underwater light for a device that moves under the sea by itself. Can be done.

(Effects of the Invention) As explained in detail above, according to the present invention,
Even if the accuracy of the outer diameter of the lamp is relatively low, the internal stress acting on the packing allows the packing to adhere uniformly to the lamp surface, so watertightness can be maintained even against high-pressure water. Furthermore, the lamp is no longer destroyed due to metal contact with other parts.

On the other hand, since the neck of the underwater lamp according to the present invention has a two-stage cylindrical structure, the diameter can be easily controlled. Therefore, the gap between the support container and the packing holder can be made sufficiently small depending on the purpose, making it easy to design a watertight structure for deep sea use.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an embodiment of the underwater lamp according to the present invention, and FIG. 2 is a detailed view showing the opening of the lamp house and the holding structure for the lamp. Figure 3,
FIG. 4 is a diagram showing in detail a holding structure for holding a lamp and an opening of a lamp house according to another embodiment of the present invention. FIGS. 5 and 6 are diagrams for explaining a conventional example of a holding structure for an underwater lamp. 1... Lamp, 2... Lamp house, 3... Socket, 4... Head, 5... O-ring, 6... Cable,
7...Patchkin, 8...Packet holder, 9...Packet holder, 10...Putkin holder, 11...Screw, 12...Guard stay, 13...Weight.

Claims (1)

[Claims] 1. An underwater light-emitting device in which the neck of a glass container housing a light-emitting portion is formed of a cylindrical portion on the base side and a cylindrical portion having a larger diameter than the cylindrical portion on the light-emitting portion side; an underwater light emitter support container having an opening having an inner diameter that receives a cylindrical portion on the base side of the underwater light emitter and a pressure receiving surface formed on an end face; an end face that abuts the pressure receiving face;
an inner wall having a step that conforms to the neck of the light emitter;
A packing made of an elastic body having an outer wall and another end surface corresponding to the end surface, and the packing is pressed from at least the other end surface side and pressed against the underwater light emitting device support container and the neck of the underwater light emitting device for sealing. a gap between the aperture that receives the cylindrical portion on the base side of the underwater light emitting device and the cylindrical portion on the base side of the glass container, an inner diameter of the seal holder, and the cylinder on the light emitting portion side of the glass container. The relationship between the gap between the shaped portions and the hardness of the packing is such that when the underwater light emitter is pushed toward the base by water pressure and the internal stress of the packing increases, problems due to extrusion do not occur. An underwater lamp characterized in that the underwater lamp is configured to support the neck of the underwater light emitter.