JP5258026B2 - Light bulb shaped fluorescent lamp - Google Patents

Description

  The present invention relates to a bulb-type fluorescent lamp.

A bulb-type fluorescent lamp is known in which a fluorescent tube and a lighting circuit are accommodated in a bulb-shaped housing (for example, Patent Document 1). Since this bulb-type fluorescent lamp has a base that can be attached to a socket for an incandescent bulb, it can be attached to a lighting fixture that uses the incandescent bulb to reduce power consumption.
JP 2004-103315 A

  However, as shown in FIG. 4, the conventional bulb-type fluorescent lamp 1 includes a case 4 that houses a lighting circuit between the cap 2 and the globe 3, so that it is compared with the incandescent bulb 5 having the same luminous intensity. As a result, there is a problem that the dimensions, particularly the dimensions in the longitudinal direction, are increased. For this reason, the bulb-type fluorescent lamp 1 may not be attached to a lighting fixture that uses the incandescent bulb 5.

  The present invention has been made in view of such a background, and an object thereof is to provide a compact bulb-type fluorescent lamp.

Compact fluorescent lamp according to the present invention includes a lighting circuit and the fluorescent tube, the compact fluorescent lamp constructed by the fluorescent tube and the lighting circuit is arranged inside a single glove, constituting the lighting circuit A circuit board for fixing an electronic component, and the circuit board is disposed inside the globe, and a space inside the globe is divided into a first section near the base and a second section far from the base. The fluorescent tube is disposed so as to penetrate the circuit board and extend from one of the first or second compartments to the other .

  According to the present invention, since the lighting circuit is disposed inside the globe that houses the fluorescent tube, a case that is provided between the base and the globe and accommodates the lighting circuit becomes unnecessary. Therefore, the bulb-type fluorescent lamp can be configured compactly. In addition, it becomes easy to secure the compatibility with the incandescent bulb by combining the bulb-type fluorescent lamp in the same shape and size as the incandescent bulb.

  Hereinafter, the best mode for carrying out the present invention will be described.

  FIG. 1 is a configuration diagram of a bulb-type fluorescent lamp according to the present invention, and FIG. 2 is a configuration diagram of a fluorescent tube of the bulb-type fluorescent lamp. As shown in FIG. 1, the bulb-type fluorescent lamp 1 includes a base 2 and a globe 3, and a fluorescent tube 6 and a circuit board 7 are accommodated in the globe 3.

  The base 2 is a screw-type base that can be attached to a screw-type socket (for example, E26) of a domestic incandescent lamp luminaire. The globe 3 is a housing that forms the outer shape of the bulb-type fluorescent lamp 1 and is a glass bulb that has the same shape and the same size as an incandescent lamp corresponding to the bulb-type fluorescent lamp 1 (having the same light output).

  As shown in FIG. 2, the fluorescent tube 6 includes a discharge electrode 9 attached to both ends of a glass tube 8 filled with a small amount of argon gas and mercury to form a discharge path, and the inside of the glass tube 8 (discharge path). ), The auxiliary amalgam 10 is arranged. The auxiliary amalgam 10 is configured by plating indium on a base made of stainless mesh, and absorbs mercury vapor excess due to high temperature during discharge. It is possible to suppress a decrease in brightness due to the adhesion of the mist.

  Since mercury adheres to a portion of the fluorescent tube 6 where the temperature is low, it is effective to place the auxiliary amalgam 10 in a low temperature portion of the fluorescent tube 6, for example, the uppermost part A or the lowermost part B of the fluorescent tube 6.

  Further, in order to increase the light output, it is necessary to lengthen the fluorescent tube 6, but the length of the fluorescent tube 6 that can be accommodated in the globe 3 is limited. Thus, in the present embodiment, the fluorescent tube 6 has a U-shaped bending shape repeatedly, but the shape of the fluorescent tube 6 is not limited to this. For example, the fluorescent tube 6 may be spiral.

  The circuit board 7 is a transparent disc having insulating properties, and is attached to a support column 11 fixed to the base 2 and extending inside the globe 3, so that the diameter of the globe 3, that is, the globe 3 is maximized. Held in position. Since the outer diameter of the circuit board 7 is substantially the same as the inner diameter of the globe 3, the globe 3 is partitioned into an upper part 12 and a lower part 13 with the circuit board 7 as a boundary as shown in FIG.

  As shown in FIG. 3, various electronic components 14 are fixed to the lower surface of the circuit board 7, and the electronic components 14 are connected to each other via a wiring pattern (not shown) formed on the circuit board 7. Thus, the lighting circuit 15 is formed. The lighting circuit 15 converts an alternating current supplied from a power source (generally a commercial alternating current power source) via the base 2 into a direct current, further converts it into a high frequency, and supplies it to the fluorescent tube 6 for fluorescence. This is a circuit for generating discharge in the tube 6. In addition, power is supplied to the lighting circuit 15 through a conductive wire (not shown) built in the column 11.

  In addition, a hole (not shown) through which the fluorescent tube 6 passes is opened in the circuit board 7, and the fluorescent tube 6 enters the upper portion 12 from the lower portion 13 of the globe 3 through this hole, and is bent a plurality of times. It is arranged so as to return to the lower part 13 again. Since it is configured in this way, the length of the fluorescent tube 6 accommodated in the upper part 12 of the globe 3 is longer than the part accommodated in the lower part 13.

  As described above, the bulb-type fluorescent lamp 1 according to the present embodiment has the circuit board 7 disposed substantially in the center of the globe 3 and the lighting circuit 15 is formed on the circuit board 7. The case 4 (see FIG. 4) that is in the bulb-type fluorescent lamp 1 is not necessary. Therefore, in the present embodiment, the bulb-type fluorescent lamp 1 can be configured in the same shape and size as the incandescent bulb 5 (see FIG. 4).

  Further, since the circuit board 7 is made transparent, light emitted from the fluorescent tube 6 passes through the circuit board 7. For this reason, the entire globe 3 can emit light uniformly.

  Further, since the auxiliary amalgam 10 is arranged inside the fluorescent tube 6, it is possible to adsorb excessive mercury vapor. For this reason, the adhesion of mercury to the inner surface of the fluorescent tube 6 is suppressed, so that a decrease in brightness due to use can be suppressed.

It is a block diagram of the bulb-type fluorescent lamp according to the present invention. It is a block diagram of the fluorescent tube of the bulb-type fluorescent lamp. It is a top view of the circuit board of the said bulb-type fluorescent lamp, (A) shows the upper surface of a circuit board, (B) shows the lower surface of a circuit board. It is an external view of the lightbulb-type fluorescent lamp and incandescent lamp which concern on a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Light bulb-type fluorescent lamp 2 Base 3 Globe 4 Case 5 Incandescent light bulb 6 Fluorescent tube 7 Circuit board 8 Glass tube 9 Electrode 10 Auxiliary amalgam 11 Post 12 Upper part 13 Lower part 14 Electronic component 15 Lighting circuit

Claims (6)

In a light bulb shaped fluorescent lamp comprising a lighting circuit and a fluorescent tube, the lighting circuit and the fluorescent tube are arranged inside a single globe,
A circuit board for fixing electronic components constituting the lighting circuit;
The circuit board is arranged inside the globe , and divides the space inside the globe into a first compartment near the base and a second compartment far from the base,
The fluorescent tube, the through the circuit board, wherein the first or second feature and to that conductive spherical fluorescent lamp that one is disposed so as to extend to the other from the compartment. The fluorescent tube is bent so as to approach or separate from the base at a plurality of locations, and is arranged to extend from one of the first or second sections to the other at a plurality of locations, penetrating the circuit board. The bulb-type fluorescent lamp according to claim 1 , wherein The bulb-type fluorescent lamp according to claim 2 , further comprising an amalgam that adsorbs mercury at a portion of the fluorescent tube farthest from the circuit board . The bulb-type fluorescent lamp according to claim 1 , wherein the fluorescent tube is bent in a spiral shape.   The length of the part in the second compartment of the fluorescent tube is longer than the length of the part in the first compartment
  The bulb-type fluorescent lamp according to any one of claims 1 to 4, wherein the bulb-type fluorescent lamp is characterized. The bulb-type fluorescent lamp according to any one of claims 1 to 5, wherein the circuit board is light transmissive.

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