JP2009129836A - Waterproof socket - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a waterproof socket capable of securing waterproofness, and usable over a long time by suppressing deterioration due to an ultraviolet ray. <P>SOLUTION: This waterproof socket 12 is provided with an outer shell 15 formed with a recessed part 16 for housing an end 13B (a base 14 and a light emitting surface 13A in the vicinity of the base 14) of a straight tube-like ultraviolet lamp 13 therein, and packing 18 interposed between the recessed part 16 and the ultraviolet lamp 13. A tubular body 22 includes a tubular base body 28, and a metal film 29 covering a surface 28A of the base body 28. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a waterproof socket including a cylindrical body that covers an end of a straight tubular light source.

Conventionally, as a socket of a lighting device, a socket made of general-purpose resin such as polypropylene (PP), polybutylene terephthalate (PBT), polycarbonate (PC), etc., which is relatively inexpensive, is used for a fluorescent lamp.
In addition, fluorescent lamp lighting devices such as high-intensity discharge use magnetic sockets because the temperature generated by lighting exceeds the use limit temperature of general-purpose resin.

  Further, the fluorescent lamp illuminator using the germicidal lamp uses a resin socket as in the case of a normal lighting device. When the socket is deteriorated by ultraviolet rays, it is necessary to replace the deteriorated socket.

By the way, in a sterilization apparatus using an ultraviolet germicidal lamp, in order to prevent the resin portion from being deteriorated by ultraviolet rays, a germicidal lamp is provided at the center of the tangential fan, and the tangential fan has a large number of blades. In order to prevent the deterioration of the resin part by suppressing the above-mentioned, there has been proposed (for example, see Patent Document 1).
Japanese Patent Laid-Open No. 11-276569

According to the sterilization device of Patent Document 1, it is possible to suppress the ultraviolet rays with a large number of blades of a tangential fan and to increase the life of the lighting device to the same level as that of a general device.
However, when the fluorescent lamp of Patent Document 1 is configured to be held using a resin socket, it is difficult to block the ultraviolet rays that deteriorate the socket with the blade of the tangential fan.
For this reason, the socket deteriorates, and it is necessary to replace the deteriorated socket.
However, the deterioration of the socket varies depending on the use environment, and it is difficult to replace the deteriorated socket at an appropriate time.

As a countermeasure, it is conceivable to replace the socket every time the fluorescent lamp is replaced. However, if the socket is replaced every time the fluorescent lamp is replaced, the cost increases even though a relatively inexpensive resin socket is used.
In particular, when the socket is mounted at a high place, it is necessary to attach and remove the wiring, so that the socket cannot be easily replaced like a fluorescent lamp.

Here, in order to prevent deterioration of the socket due to ultraviolet rays, an organic ultraviolet absorber may be applied as a coating film.
However, when an ultraviolet ray having a large energy such as 310 nm or 254 nm is hit, the organic ultraviolet absorber is deteriorated and it is difficult to use it for a long time.
In addition, when an inorganic ultraviolet absorber is used, a large amount of an inorganic ultraviolet absorber is required, and it is considered that the film thickness increases and the adhesion is hindered.

In addition, even if an ultraviolet absorber is added to the resin itself for molding the socket, it is difficult to prevent deterioration from the surface.
In order to prevent deterioration from the surface, it is conceivable to add a large amount of an ultraviolet absorber, but if a large amount of the ultraviolet absorber is added, the physical properties of the resin itself are impaired.

Moreover, the sterilization apparatus of patent document 1 sterilizes by the convection of the air generated with the tangential fan, without irradiating an ultraviolet-ray directly.
For this reason, when it is desired to sterilize by directly irradiating ultraviolet rays, the sterilization apparatus of Patent Document 1 cannot be used.

  The present invention has been made to satisfy the above-described demand, and an object of the present invention is to provide a waterproof socket that can ensure waterproofness and can be used for a long period of time while suppressing deterioration against ultraviolet rays.

  The waterproof socket of the present invention is a waterproof socket including a cylindrical body that covers an end portion of a straight tubular light source, and the cylindrical body includes a cylindrical base and a metal film that covers the surface of the base. Features.

By covering the end portion of the light source with the cylindrical body, waterproofness of the end portion of the light source can be ensured.
In addition, the cylindrical body that covers the edge of the light source has a metal film that covers the surface of the substrate, so that the metallic film reflects ultraviolet rays to prevent deterioration of the cylindrical body, enabling long-term use of the waterproof socket. I made it.

  Further, the present invention is characterized in that an insulating layer is provided inside the cylindrical body.

  By providing the insulating layer on the inner side of the cylindrical body, conduction with the light source can be prevented in the portion where the light source is inserted and in the vicinity thereof, and the light source can be prevented from being short-circuited.

  Furthermore, the present invention is characterized in that a metal film is provided on the inner surface of the insulating layer so as to correspond to the light emitting surface of the light source.

By providing a metal film on the inner surface of the insulating layer corresponding to the light emitting surface of the light source, ultraviolet rays can be reflected by the metal film.
Accordingly, even if the insulating layer is formed of an inexpensive material, the insulating layer can be used for a long period of time by preventing deterioration of the insulating layer due to ultraviolet rays.

According to the waterproof socket of the present invention, the end of the light source is covered with the cylindrical body, so that the waterproof property of the end of the light source can be ensured.
In addition, the cylindrical body that covers the end of the light source has a metal film that covers the surface of the substrate, so that the metallic film reflects ultraviolet rays to prevent deterioration of the cylindrical body, and the waterproof socket can be used for a long time. Have

Hereinafter, a waterproof socket according to an embodiment of the present invention will be described with reference to the drawings.
(First embodiment)
As shown in FIG. 1, the fluorescent lamp illumination device 10 according to the first embodiment is provided with waterproof sockets 12 at both ends 11A of a base 11, and an ultraviolet lamp 13 is detachably attached to the waterproof sockets 12 at both ends 11A. Is provided.

  As shown in FIGS. 2 to 4, the waterproof socket 12 has a recess 16 (see FIG. 3) that accommodates 13 </ b> B (the base 14 and the light emitting surface 13 </ b> A in the vicinity of the base 14) of the straight tubular ultraviolet lamp (light source) 13. The outer shell 15 formed and a packing (insulating layer) 18 interposed between the concave portion 16 and the ultraviolet lamp 13 are provided.

The ultraviolet lamp 13 is a light source that emits ultraviolet rays when emitting light.
The outer shell 15 includes an outer shell body 21 that can be attached to the base 11, and a cylindrical body 22 that houses the base 14 of the ultraviolet lamp 13 and the light emitting surface 13 </ b> A in the vicinity of the base 14.

The outer body 21 is a part facing the end surface 14A of the base 14 of the ultraviolet lamp 13 and includes a bottom 16A of the recess 16.
A pair of electrode insertion grooves 25 into which the lamp electrodes (lamp terminals) 24 of the ultraviolet lamp 13 can be inserted are formed in the bottom portion 16A, and outer electrodes (not shown) that can contact the lamp electrodes 24 in the pair of electrode insertion grooves 25. Z).
A male screw 23 is formed on the outer periphery of the bottom portion 16A.
The outer electrode is electrically connected to a power source (not shown).

  The outer body 21 is a member formed of a general-purpose resin such as polypropylene (PP), polybutylene terephthalate (PBT), or polycarbonate (PC).

The outer main body 21 has a metal film (reflection film) 27 formed on the bottom 16A and the other outer periphery 21A.
The metal film 27 is made of a material and a film thickness that do not substantially transmit ultraviolet rays of about 300 to 380 nm or less.
Specific examples of the metal film 27 include reflective materials such as aluminum, chromium, copper, gold, silver, and composite metals thereof. Aluminum and chromium are used from the viewpoint of adhesion and film oxidation. desirable.

The film thickness of the metal film 27 is preferably 0.1 to 3.0 μm from the viewpoint of adhesion and permeability.
For example, when a PP resin having poor adhesion is used as the material of the outer body 21, it is possible to give fine adhesion to the surface on which the coating film is formed, or to increase the adhesion by performing corona treatment.

The cylindrical body 22 is a member constituting the side wall of the concave portion 16 and is formed in a cylindrical shape so that the end portion 13B (the base 14 and the light emitting surface 13A in the vicinity of the base 14) of the ultraviolet lamp 13 can be stored.
The cylindrical body 22 includes a cylindrical base body 28 and a metal film 29 covering the surface 28A of the base body 28. A female screw 31 is formed on the inner periphery of the base end portion 22A, and the distal end portion 22B is radially inward. An overhanging portion 32 is provided.

By covering the end portion 13B (the base 14 and the light emitting surface 13A in the vicinity of the base 14) of the ultraviolet lamp 13 with the cylindrical body 22, the waterproofness of the end portion 13B can be ensured.
The cylindrical base 28 is a member formed of a general-purpose resin such as polypropylene (PP), polybutylene terephthalate (PBT), polycarbonate (PC).

Further, by covering the surface 28A of the base 28 with the metal film 29, the ultraviolet rays radiated from the ultraviolet lamp 13 are reflected by the metal film 29, thereby preventing the cylindrical body 22 from being deteriorated and the waterproof socket 12 being used for a long time. Is possible.
The metal film 29 is a reflective film formed by insert molding on the surface 28A of the cylindrical base 28, and has an internal thread 31 on the inner periphery.

The metal film 29 is made of a material and a film thickness that do not substantially transmit ultraviolet rays of about 300 to 380 nm or less.
Specifically, the metal film 29 includes reflective materials such as aluminum, chromium, copper, gold, silver, and composite metals thereof, and aluminum or chromium is used from the viewpoint of adhesion and film oxidation. desirable.

By providing the outer main body 21 and the cylindrical body 22 with the metal films (reflection films) 27 and 29, respectively, the ultraviolet rays emitted from the ultraviolet lamp 13 can be reflected by the metal films 27 and 29.
Therefore, deterioration of the outer shell body 21 and the cylindrical body 22 can be prevented, and the waterproof socket 42 can be used for a long time.

A cylindrical packing 18 is provided inside the cylindrical body 22.
The packing 18 as an insulating layer is accommodated in the recess 16 (that is, in the cylindrical tube 22), and is fitted to the side wall 14B of the base 14 or the light emitting surface 13A in the vicinity of the base 14 to thereby form the side wall of the base 14. 14B and a cylindrical rubber member covering the light emitting surface 13A near the base 14.
As an example, the packing 18 is formed using a relatively inexpensive ethylene propylene (EPT) rubber or the like.

The rubber packing 18 is disposed in the recess 16 (that is, in the cylindrical tube 22), and the rubber packing 18 covers the side wall 14B of the base 14 and the light emitting surface 13A in the vicinity of the base 14 so that the recess 16 is covered. The waterproofness inside can be ensured.
Further, by providing the rubber packing 18 inside the cylindrical body 22, conduction with the ultraviolet lamp 13 is prevented in the side wall 14B of the base 14 and the light emitting surface 13A in the vicinity of the base 14 and in the vicinity thereof, and the ultraviolet lamp 13 is short-circuited. Can be prevented.

The packing 18 is provided with a metal film 33 corresponding to the light emitting surface 13A in the vicinity of the base 14 on the inner surface 18A.
In the first embodiment, the example in which the metal film 33 is provided on the inner surface 18A of the packing 18 corresponding to the light emitting surface 13A in the vicinity of the base 14 has been described. However, the metal film 33 may be provided on the entire inner surface 18A.

By providing the metal film 33 on the inner surface 18 </ b> A of the packing 18 corresponding to the light emitting surface 13 </ b> A in the vicinity of the base 14, ultraviolet rays can be reflected by the metal film 33.
As a result, even if the packing 18 is formed of a relatively inexpensive material such as ethylene propylene (EPT) rubber, the packing 18 can be used for a long period of time by preventing deterioration of the packing 18 due to ultraviolet rays.

The metal film 33 can be formed in the same manner as the metal film 27.
Here, when an electric leakage current or the like is generated by forming the metal film 33, an insulating layer may be formed on the surface of the metal film 33 (surface facing the ultraviolet lamp 13).

Next, the assembly procedure of the waterproof socket 12 will be described with reference to FIG.
First, after the cylindrical body 22 is fitted into the ultraviolet lamp 13 from the base 14 side of the ultraviolet lamp 13, the packing 18 is fitted.
Next, the lamp electrode 24 of the ultraviolet lamp 13 is inserted into the electrode insertion groove 25 of the outer body 21, and the lamp electrode 24 is brought into contact with the outer electrode of the electrode insertion groove 25 of the outer body 21.
Next, the female screw 31 of the cylindrical body 22 is screwed to the male screw 23 of the outer shell main body 21. Thereby, the assembly of the waterproof socket 12 is completed.

(Second Embodiment)
As shown in FIG. 5, the waterproof socket 42 of the second embodiment is a portion of the surface of the metal film 27 formed on the bottom 16 </ b> A of the recess 16 of the first embodiment where the pair of lamp electrodes 24 may be short-circuited. An insulating layer 43 is provided on the substrate.

Specifically, among the surfaces of the metal film 27 (see FIG. 4), at least the electrode insertion groove 25 into which the lamp electrode 24 is inserted and the vicinity of the electrode insertion groove 25, the space between the lamp electrodes 24 contacts the metal film 27. Insulating layer 43 is provided in the part which is short-circuited.
Therefore, it is possible to prevent the pair of lamp electrodes 24 from coming into contact with the metal film 27 and short-circuiting.

The insulating layer 43 can cover the entire surface of the metal film 27 and other parts, but as shown in FIG. 5, an interval of L (specifically, 2 mm) or more from the electrode insertion groove 25 is secured. It is desirable to do.
This is because if the distance L is 2 mm or less, the lamp electrode 24 may come into contact with the insulating layer 43 in a state where the lamp electrode 24 is inserted into the electrode insertion groove 25.

The insulating layer 43 may be a fluororesin, an inorganic coating film, or the like, but is not limited thereto, and may be any insulating material that can suppress deterioration due to ultraviolet rays.
Furthermore, the insulating layer 43 is provided by a method of forming by applying an insulating material, a method of attaching a member formed with the insulating material to an insulating portion, or the like.

In the first and second embodiments, the example in which the packing 18 is formed of a relatively inexpensive material such as ethylene propylene (EPT) rubber has been described. However, the packing 18 is formed of another insulating material such as silicon rubber. It is also possible.
Since the silicon rubber has a characteristic that hardly deteriorates against ultraviolet rays, the metal film 33 can be removed from the inner surface 18A of the packing 18.

  Moreover, although the said 1st-2nd embodiment demonstrated the example which formed the metal film 27 in the bottom part 16A and other outer periphery 21A of the outer shell main body 21, it is not restricted to this, The bottom part 16A and other outer periphery 21A Alternatively, the metal film 27 may not be formed.

  Furthermore, the shapes of the waterproof sockets 12, 42, the ultraviolet lamp 13, the outer shell body 21, the cylindrical body 22, and the like shown in the first and second embodiments are not limited to those illustrated, and can be appropriately changed. .

  The present invention is suitable for application to a waterproof socket having a cylindrical body that covers an end portion of a straight tubular light source.

It is a perspective view which shows the illuminating device for fluorescent lamps which attached the waterproof socket (1st Embodiment) which concerns on this invention. It is a disassembled perspective view which shows the waterproof socket of 1st Embodiment. It is sectional drawing which shows the waterproof socket of 1st Embodiment. It is sectional drawing shown in the state which decomposed | disassembled the waterproof socket of 1st Embodiment. It is a front view which shows the outline main body of the waterproof socket (2nd Embodiment) which concerns on this invention.

Explanation of symbols

12, 42 Waterproof socket 13 UV lamp (light source)
13A Light emitting surface near base (light emitting surface of light source)
End of 13B UV lamp (end of light source)
14 Base 16 Recess 16A Bottom of Recess 18 Packing (Insulating Layer)
18A Inner surface of packing (Inner surface of insulating layer)
22 cylinder 27, 29, 33 metal film 28 substrate 28A substrate surface

Claims (3)

A waterproof socket comprising a cylindrical body covering the end of a straight tubular light source,
The waterproof socket, wherein the cylindrical body includes a cylindrical base and a metal film that covers a surface of the base.   The waterproof socket according to claim 1, further comprising an insulating layer inside the cylindrical body.   The waterproof socket according to claim 1, wherein a metal film is provided on the inner surface of the insulating layer so as to correspond to the light emitting surface of the light source.

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