JP2014002911A - Lamp with base and lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lamp with a base, which can maintain sealability of a housing by protecting the housing of a sealed structure.SOLUTION: A lamp 10 with a base includes a housing 11 of a sealed structure having a translucent cover 17 on side of one end and the base 19 on the side of the other end. The housing 11 houses a light-emitting part having a semiconductor light-emitting element for emitting light from the translucent cover 17, and a lighting circuit for supplying lighting power to the semiconductor light-emitting element. The housing 11 is provided with a pressure regulating valve 36 for regulating pressure in the housing 11.

Description

  Embodiments described herein relate generally to a lamp with a cap having a sealed housing and a lighting fixture using the lamp with the cap.

  2. Description of the Related Art Conventionally, outdoor lighting fixtures used for, for example, signboard lighting have a structure in which a lamp is exposed from a fixture body in a mounted state in which a lamp base is connected to a socket in the fixture body. Between the instrument body and the lamp, the packing on the instrument body side is in close contact with the periphery of the lamp to ensure waterproofness.

  For such lighting fixtures that require waterproofness, incandescent bulbs and mercury lamps that do not allow rainwater to enter inside are suitable. From the viewpoint of low power consumption and long life, for example, LED elements are used as light sources. An alternative to a lamp with a base is preferred.

JP 2005-337000 A

  In consideration of waterproofness, the lamp with a cap needs to have a sealed structure by interposing packing between a plurality of members constituting the casing of the cap with lamp.

  However, if the casing of the lamp with cap is made to have a sealed structure, the pressure in the casing rises due to the heat generated by the LED element and the heat generated by the lighting circuit when the lamp with the cap is turned on, while the lamp with the cap is turned off. As a result, the pressure drops to atmospheric pressure. For this reason, the pressure in the housing fluctuates greatly, and there is a risk that the casing member and the packing used to obtain the sealing of the housing will be subjected to a load due to the pressure change, and the sealing of the housing may not be maintained. is there.

  The problem to be solved by the present invention is to provide a lamp with a cap capable of protecting a casing having a sealed structure and maintaining the sealing performance of the casing, and a lighting fixture using the lamp with the cap.

  The lamp with a base of the embodiment includes a sealed housing having a light emitting part on one end side and a base on the other end side. The housing accommodates a light emitting section having a semiconductor light emitting element that emits light from the light emitting section, and a lighting circuit that supplies lighting power to the semiconductor light emitting element. The casing is provided with a pressure adjustment valve that adjusts the pressure in the casing.

  According to the present invention, it is possible to protect the casing of the hermetic structure and maintain the hermeticity of the casing by suppressing the change in the pressure in the casing in response to turning on and off with the pressure regulating valve.

It is a perspective view of the lamp | ramp with a base which shows one Embodiment. It is a perspective view of the decomposition | disassembly state of a lamp | ramp with a base same as the above. It is a side view of the lighting fixture using a lamp with a cap same as the above.

  Hereinafter, an embodiment will be described with reference to FIGS. 1 to 3.

  In FIG. 1 and FIG. 2, the cap-equipped lamp 10 includes a housing 11 having a light bulb shape, and includes a light emitting unit 12 and a lighting circuit 13 housed in the housing 11.

  The housing 11 includes a heat radiating body 16, a translucent cover 17 constituting a light emitting portion attached to one end of the heat radiating body 16, an insulating case 18 projecting to the other end of the heat radiating body 16, and an insulating case 18 A base 19 attached to the other end is provided.

  The radiator 16 is made of, for example, a metal such as magnesium or aluminum or a resin having good thermal conductivity, and is formed in a cylindrical shape having both ends opened, and has a taper whose diameter decreases from one end side to the other end side. It is formed into a shape. When the radiator 16 is made of metal, the radiator 16 is manufactured by a manufacturing method such as die casting, press molding, drawing, or cutting. The outer peripheral surface of the radiator 16 has a packing contact portion 22 that is in contact with the packing on the luminaire side when the lamp with cap 10 is attached to the luminaire and ensures waterproofness, and one end side from the packing contact portion 22 A plurality of heat radiating fins 23 are formed. Further, an annular screw portion 24 for screwing and attaching the translucent cover 17 is formed on one end side of the radiator 16, and a light emitting portion attaching portion for attaching the light emitting portion 12 inside the radiator 16 Insulating case attaching portions (not shown) for attaching 25 and insulating case 18 are formed.

  The translucent cover 17 is made of, for example, a resin having translucency, and is screwed to the screw portion 24 with an annular packing 28 interposed between the translucent body 16 and the one end side opening of the radiator 16. Is covered in a sealed state.

  The insulating case 18 is made of, for example, resin having an insulating property, and is formed in a cylindrical shape so as to accommodate the lighting circuit 13. The insulating case 18 is inserted from the opening on one end side of the heat radiating body 16 with an annular packing 31 interposed therebetween, and is attached to the insulating case mounting portion in the heat radiating body 16, and the space between the heat radiating body 16 is sealed by the packing 31. ing. Formed on one end side of the insulating case 18 is a case portion 32 that protrudes through the other end opening of the radiator 16 and constitutes a part of the housing 11. A base attachment portion 33 for attaching the base 19 is formed at the tip of the case portion 32.

  The base 19 is a screw-type base and is attached to the base attachment portion 33 of the insulating case 18. The inside of the base 19 attached to the base attaching part 33 is filled with a filler such as silicone resin, and the space between the insulating case 18 and the base is sealed. Note that the base may have any form other than a screw-in type, such as an insertion pin type or a rotation latch type.

  Therefore, the space between the radiator 16 and the translucent cover 17 is sealed with the packing 28, the space between the radiator 16 and the insulating case 18 is sealed with the packing 31, and the space between the insulating case 18 and the base 19 is a filler. The casing 11 is formed in a hermetically sealed structure by being sealed.

  Further, the housing 11 is provided with a pressure adjusting valve 36 that adjusts the pressure inside the housing 11 within a certain range with respect to the atmospheric pressure. The position of the pressure adjusting valve 36 is a position closer to the base than the packing contact portion 22 and is a position of the case portion 32 of the insulating case 18 between the radiator 16 and the base 19. The pressure regulating valve 36 has, for example, a communication hole that communicates the inside and the outside of the housing 11 and a valve body that closes the communication hole, and a pressure difference between the pressure inside the housing 11 and the atmospheric pressure outside the housing 11 Is equal to or greater than a predetermined value, the valve body is displaced by the pressure difference to open the communication hole, and the inside and outside of the housing 11 communicate with each other to reduce the pressure difference. The pressure regulating valve 36 is preferably provided with a filter in the ventilation path in order to prevent dust and the like from entering the housing 11 and biting between the communication hole and the valve body.

  The light emitting unit 12 includes a substrate 39 and a semiconductor light emitting element 40 provided on one surface of the substrate 39. The substrate 39 is made of a material such as metal, ceramics, and resin. The semiconductor light emitting element 40 includes, for example, an LED element and an organic EL. In the case of the LED element, a COB module method in which a plurality of LED chips mounted on the substrate 39 are integrally sealed with a phosphor layer, or a surface mount type SMD package method is used. Further, the substrate 39 is screwed to the light emitting portion mounting portion 25 of the heat radiating body 16 in a state of being superimposed on the heat radiating plate via an insulating sheet (not shown). Therefore, the light emitting unit 12 is attached to the heat radiating body 16 so as to be able to conduct heat.

  The lighting circuit 13 includes a circuit board 43 and a plurality of electronic components (not shown) mounted on the circuit board 43. The lighting circuit 13 is electrically connected to a base 19 that is accommodated in the insulating case 18 and attached to the insulating case 18, and is electrically connected to the semiconductor light emitting element 40 of the substrate 39. The lighting circuit 13 is a rectifying / smoothing circuit that rectifies and smoothes commercial AC power supplied from the base 19, and a power supply voltage that converts the rectified and smoothed power supply voltage into a lighting power supply voltage and supplies the power to the semiconductor light emitting element 40. It has a conversion circuit. In addition, with the lighting circuit 13 and the base 19 assembled to the insulating case 18, a filling material such as silicone resin is filled between the lighting circuit 13 and the base 19 so that the lighting circuit 13 and the base 19 are thermally connected. Is bound to. This filler is the same as the filler that seals between the insulating case 18 and the base 19, and both thermal coupling and sealing can be performed at the same time by one filling.

  Further, FIG. 3 shows a lighting fixture 50 using the lamp with cap 10. This luminaire 50 is an outdoor luminaire used for, for example, signboard illumination, and has a fixture main body 51 having one end opened. A socket 52 is disposed on the other end side in the instrument main body 51, and an annular packing 53 is attached to the periphery of the opening on one end side of the instrument main body 51.

  An angle adjustment mechanism 54 is provided on the other end side of the fixture body 51, and the angle adjustment mechanism 54 is supported by a pipe-like support member 55 that supports the lighting fixture 50. A power line wired in the support member 55 is connected to the socket 52 in the instrument body 51 through the angle adjustment mechanism 54. Therefore, the inside of the instrument main body 51 is opened to the atmosphere through the wiring space of the power supply line such as the inside of the support member 55.

  Then, the base side of the lamp with cap 10 is inserted from the opening on one end side of the instrument body 51, and the base 19 is screwed into the socket 52 to be electrically and mechanically connected. In the process of screwing the lamp with cap 10 into the socket 52, the packing contact portion 22 on the outer peripheral surface of the radiator 16 contacts the packing 53, and the gap between the lamp with cap 10 and the instrument body 51 is sealed.

  In a state where the lamp with cap 10 is attached to the lighting fixture 50, the pressure regulating valve 36 is disposed in the fixture main body 51 sealed by the packing 53.

  Then, by supplying commercial AC power to the lamp with cap through the power line and the socket 52, the lighting power converted by the lighting circuit 13 is supplied to the semiconductor light emitting element 40, and the semiconductor light emitting element 40 is turned on. The light generated by the semiconductor light emitting device 40 passes through the translucent cover 17 and is irradiated on the irradiated object.

  Further, when the lamp with cap 10 is turned on, the heat generated by the semiconductor light emitting element 40 is thermally conducted to the radiator 16 and dissipated into the atmosphere, and further, the heat generated by the lighting circuit 13 is transferred to the cap 19. Conducted, thermally conducted from the base 19 to the instrument body 51 through the socket 52, and radiated from the instrument body 51 to the atmosphere.

  In addition, when the lamp 10 with the cap turned off is turned on, the air in the sealed casing 11 is heated and expanded by the heat generated by the semiconductor light emitting element 40 and the lighting circuit 13, and the pressure in the casing 11 is increased. It rises from atmospheric pressure. When the pressure difference between the internal pressure of the housing 11 and the external atmospheric pressure exceeds a predetermined value, the valve body of the pressure regulating valve 36 is displaced by the pressure difference to open the communication hole, and the internal pressure of the housing 11 To the outside, and the pressure difference between the internal pressure of the housing 11 and the external atmospheric pressure is reduced.

  Moreover, the temperature of the air in the housing 11 is lowered to the atmospheric temperature by turning off the lamp with cap 10 that has been turned on. The air in the housing 11 contracts due to this temperature drop, and the pressure in the housing has dropped below atmospheric pressure. Due to the difference, the valve body of the pressure regulating valve 36 is displaced to open the communication hole, and outside air enters the inside of the housing 11 to reduce the pressure difference between the pressure inside the housing 11 and the external atmospheric pressure.

  In this manner, the cap-equipped lamp 10 can protect the casing 11 having a sealed structure by suppressing the change in the pressure in the casing 11 in response to turning on and off by the pressure adjusting valve 36, and is particularly susceptible to deterioration. 28, 31 and the insulating case 18 can be protected, and the sealing property of the housing 11 can be maintained.

  Further, the pressure regulating valve 36 may be provided in the heat radiating body 16, but is preferably provided in a place of the insulating case 18 between the heat radiating body 16 and the base 19. This is because when the pressure regulating valve 36 is provided at the location of the radiator 16, holes are drilled in the radiator 16 and there is a risk of deterioration such as oxidation at the machining location. This is because there is no risk of such deterioration.

  Further, the pressure regulating valve 36 is provided on the base side from the packing contact portion 22 that contacts the packing 53 of the lighting fixture 50, that is, contacts the lamp 10 with the base when the lamp 10 with the base is mounted on the lighting fixture 50. Since it is disposed in the instrument body 51 sealed by the packing 53, rainwater can be prevented from entering the casing 11 through the pressure regulating valve 36.

  Note that the pressure regulating valve 36 may be provided in the radiator 16 or the translucent cover 17 according to the application of the lamp 10 with the cap.

  The pressure regulating valve 36 may be a diaphragm that is displaced by pressure, for example.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

10 Lamp with cap
11 Enclosure
12 Light emitter
13 Lighting circuit
16 Heat sink
17 Translucent cover as light exit
18 Insulation case
19 base
22 Packing contact
36 Pressure regulating valve
40 Semiconductor light emitting device
50 light fixtures
51 Instrument body
52 socket
53 Packing

Claims (4)

A sealed housing having a light emitting portion on one end and a base on the other end;
A light emitting unit having a semiconductor light emitting element housed in a housing and emitting light from the light emitting unit;
A lighting circuit that is housed in a housing and supplies lighting power to the semiconductor light emitting element;
A pressure regulating valve provided in the housing for adjusting the pressure in the housing;
A lamp with a base, characterized by comprising: The housing has a heat radiator that is connected so that the light emitting part can conduct heat, and an insulating case that is disposed between the heat radiator and the base,
The lamp with cap according to claim 1, wherein the pressure regulating valve is provided at a location of an insulating case between the radiator and the cap. The casing has a packing contact portion that is in contact with the packing on the lighting fixture side around the casing,
The lamp with cap according to claim 1 or 2, wherein the pressure adjusting valve is provided on the cap side from the packing contact portion. An instrument body having an open end and a socket;
A lamp with a base according to any one of claims 1 to 3, wherein the base side of the housing is inserted into the instrument body from an opening on one end side of the instrument body, and the base is connected to the socket;
A packing that is interposed between one end of the instrument body and the housing of the lamp with the cap, and contacts the periphery of the housing on the light emitting side from the pressure regulating valve;
The lighting fixture characterized by comprising.

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