JPH11191304A - Electrodeless fluorescent lamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a working lamp having a long service life, resistant to vibration and never limiting the working range by providing a metal mesh on a case for covering a high frequency power source so as to cover a handle and a discharge vessel, and providing a chargeable battery for driving the power source within the handle so that the working lamp is portable. SOLUTION: This working lamp is provided with a lighting circuit 3 set in the lower part of a discharge vessel 1 and a charging battery 4 set under it, and the housing part of the lighting circuit 3 is covered with a metallic vessel so that the high frequency electromagnetic field is never leaked to the outside of a lamp. The lighting circuit 3 generates a high frequency by the charging battery 4 or a commercial power source, and this output is connected to an exciting coil 5 provided in the cylindrical part. A handle 8 is provided in the lower part of the housing case 7 of the lighting circuit 3 for easy carrying, and a metal mesh 10 is provided around the discharge vessel 1 in the upper part of the housing case 7 so as to reduce the quantity of the high frequency electromagnetic field leaking to the outside. A commercial power source connecting plug cord 9 is provided on the end part of the handle 8 to connect the commercial power source to the charging battery 4 and the lighting circuit 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a long-life electrodeless fluorescent lamp having no electrodes in a discharge vessel, and more particularly to a lamp suitable for use in outdoor work.

[0002]

2. Description of the Related Art In recent years, electrodeless fluorescent lamps have been studied as long-life lamps. For example, JP-A-7-192627
Issue. An electrodeless fluorescent lamp generates a high-frequency current by applying a high-frequency current to an excitation coil disposed close to a discharge vessel filled with a discharge gas or applying a high-frequency voltage to a pair of opposed electrodes disposed close to the discharge vessel. It discharges and emits a discharge gas in a discharge vessel by an electromagnetic field. The frequency of the high frequency is about several MHz to several tens MHz. This electrodeless fluorescent lamp has a feature that it has a long life because it has no electrode in the discharge vessel.

As a substitute for a general incandescent light bulb, a compact light bulb-type fluorescent lamp using an Edison base and incorporating a lighting circuit has been developed. As for the above-mentioned electrodeless fluorescent lamp, a small-sized fluorescent lamp with a built-in high-frequency power source using an Edison base has been developed. Conventionally, the work light has been used by a method of providing a handle and a socket for Edison base, and covering the lamp with a wire mesh to protect the lamp from external action, but the work light is a general incandescent light bulb,
A method of providing a plug cord for connecting to a commercial power supply for lighting was adopted.

[0004]

Since the working lamp uses a general incandescent light bulb, it consumes a large amount of power, and the power is supplied via a plug cord. The working range is determined by the length of the plug cord. Was. In addition, ordinary incandescent lamps have a short life and are susceptible to vibration.

An object of the present invention is to provide a working lamp which has a long service life, is relatively resistant to vibration, and has a limited working range.

[0006]

SUMMARY OF THE INVENTION The object of the present invention is to use an electrodeless fluorescent lamp in which a lighting circuit unit is integrally combined with a discharge vessel as a light source of a working lamp, and to handle a case covering a lighting circuit and cover a discharge vessel. A metal mesh is provided as described above, a rechargeable battery for driving a lighting circuit, and a plug cord for charging the battery are provided in the case or the handle, and the commercial power supplied from the plug cord is the rechargeable battery. This is achieved by adopting a configuration for inputting to a lighting circuit.

[0007]

FIG. 1 shows a working lamp of an electrodeless fluorescent lamp as one embodiment of the present invention. The discharge vessel 1 is made of a glass vessel equivalent to an ordinary fluorescent lamp. The appearance is substantially spherical, and has a portion extending cylindrically inward from the bottom side.

The discharge vessel 1 is filled with a rare gas such as argon and mercury or amalgam. Discharge vessel 1
Inside, the phosphor 2 is applied to the inner surface of the outer glass, and the phosphor 2 is applied to the cylindrical portion. Next, a lighting circuit 3 and a rechargeable rechargeable battery 4 are provided below the lighting circuit 3 at a lower portion of the discharge vessel 1, and a housing portion of the lighting circuit 3 is covered with a metal container so that a high-frequency electromagnetic field does not leak outside the lamp. Have been done.

The lighting circuit 3 generates a high frequency of several MHz from a rechargeable battery 4 or a commercial power supply, and the high frequency output is connected to an excitation coil 5 provided in a cylindrical portion. The excitation coil 5 is a wire wound around a cylindrical ferrite 6 and coated with, for example, Teflon.

A handle 8 is provided at a lower portion of the case 7 for housing the lighting circuit 3 so as to be easily carried, and a metal net is provided at an upper portion of the case 7 so as to reduce an amount of a high-frequency electromagnetic field leaking outside. 10 is provided around the discharge vessel. At the end of the handle 8, a plug cord 9 for connecting to a commercial power supply is provided. Commercial power from the plug cord 9 is connected to the rechargeable battery 4 and the lighting circuit 3.

[0011]

According to the present invention, a handle and a rechargeable rechargeable battery are provided in a case covering a lighting circuit of an electrodeless fluorescent lamp integrally formed with a lighting circuit, and a metal net is formed so as to cover the discharge vessel. By providing it, it has a long life and is relatively resistant to vibration,
It is possible to provide a working lamp whose working range is not limited.

[Brief description of the drawings]

FIG. 1 is a partial sectional view of a working light according to an embodiment of the present invention.

[Description of References] 1 ... discharge vessel, 2 ... phosphor, 3 ... lighting circuit, 4 ... rechargeable battery, 5 ... excitation coil, 6 ... ferrite core, 7 ... storage case, 8 ... handle, 9 ... plug cord, 10 ... a metal net.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Atsushi Takekiyo 888 Fujibashi, Ome-shi, Tokyo Heating Lighting Division, Hitachi, Ltd.

Claims (2)

[Claims] 1. A light-transmissive discharge vessel in which a gas filling capable of being excited with a luminescent substance is enclosed, a coil for generating a high-frequency electromagnetic field for discharging closely to the discharge vessel, and a high-frequency power supply. In an integrated electrodeless fluorescent lamp comprising a high-frequency power supply for supplying, a handle is provided on a case covering the high-frequency power supply, a metal mesh is provided on the case so as to cover the discharge vessel, and the high-frequency power supply is driven. An electrodeless fluorescent lamp characterized in that a rechargeable battery is provided in the case or the handle so as to be portable. 2. The electrodeless fluorescent lamp according to claim 1, further comprising a plug cord for charging a rechargeable battery for driving a high-frequency power supply built in said electrodeless fluorescent lamp, and The supplied commercial power is supplied to the rechargeable battery and the high-frequency power source, so that the rechargeable battery can be lit while being charged and turned on by the battery. Characteristic electrodeless fluorescent lamp.