JP2009059557A - Fluorescent lamp with built-in lighting circuit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fluorescent lamp with a built-in lighting circuit which can surely fix a glass globe irrespective of a condition of an adhesive agent. <P>SOLUTION: The fluorescent lamp with a built-in lighting circuit is provided with a globe 2 covering a fluorescent tube 1, a lighting circuit housing portion 4 for housing a lighting circuit 3 for lighting up the fluorescent tube 1, and a fitting claw 5 for holding the globe 2 on the lighting circuit housing portion 4. The globe 2 is preferably made of glass and the number of the fitting claws is preferably two or more, which are arranged in positions in a rotating symmetry on a circumference of an open portion 2a of the globe 2. The fitting claw 5 is preferably made of resin integrally with a part of the lighting circuit housing portion 4, or may be made of metal. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a fluorescent lamp incorporating a lighting circuit. More specifically, the present invention relates to a lighting circuit built-in fluorescent lamp having a globe covering a fluorescent tube.

  In order to reduce power consumption while using an incandescent lamp as it is, a bulb-type fluorescent lamp with a built-in lighting circuit is used. In order to replace a bulb-type fluorescent lamp with a bulb, it is necessary to reduce the number of manufacturing steps as much as possible. As a method for improving the assemblability of the bulb-type fluorescent lamp, there is, for example, Patent Document 1.

  In the technique of Patent Document 1, an envelope composed of a base and a translucent glove is divided into a first space on the base side and a second space on the glove side by a partition plate, and lamp lighting means is provided in the first space. In the case where the curved tube fluorescent lamp is housed in the second space, the base and the globe are fixed on the peripheral portion of the partition plate and below the peripheral portion so that the outer periphery of the partition plate is exposed. In addition, it is described that the nail formed on the globe is engaged with and fixed to the partition plate.

Bulb-type fluorescent lamps are more compact in order to replace the bulbs and to make lighting fixture constraints as close as possible to the bulbs. And glass material is used for the glove for light transmission and heat resistance. Glass globes are difficult to form protrusions, and the strength is weakened when holes or recesses are formed. The glass globe is attached to the base portion that houses the lighting circuit with an adhesive.
Japanese Utility Model Publication No. 62-15708

  Since the glass globe of the bulb-type fluorescent lamp is fixed to the base portion that houses the lighting circuit with only an adhesive, it is necessary to give sufficient consideration to the strength of the adhesive. In order to maintain the adhesive force while preventing the adhesive from protruding, it is necessary to strictly control the assembly process.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide a fluorescent lamp with a built-in lighting circuit that ensures the fixation of a glass globe regardless of the state of an adhesive.

The fluorescent lamp with a built-in lighting circuit according to the first aspect of the present invention,
A globe covering a fluorescent tube;
A housing portion for housing a lighting circuit for lighting the fluorescent tube;
An engaging portion that is provided in the housing portion, engages with an inner surface near the opening of the globe, and holds the globe in the housing portion;
It is characterized by providing.

  Preferably, the globe is made of glass.

  Preferably, the number of the engaging portions is two or more, and is in a rotationally symmetric position around the opening of the globe.

  Preferably, the engaging portion is made of resin and is formed integrally with a part of the housing portion.

  Alternatively, the engaging portion may be made of a resilient metal.

  According to the fluorescent lamp with a built-in lighting circuit of the present invention, the reliability of fixing the globe to the lighting circuit housing portion is improved by mechanically fixing, compared to the case of using only the adhesive.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals, and description thereof will not be repeated.

(Embodiment 1)
FIG. 1 is a partially cutaway view showing a configuration example of a fluorescent lamp 10 according to Embodiment 1 of the present invention. FIG. 2 is a plan view showing a configuration example of the fluorescent lamp 10 according to the first embodiment.

  As shown in FIG. 1, a fluorescent lamp 10 includes a fluorescent tube 1, a globe 2 that covers the fluorescent tube 1, a lighting circuit 3 that lights the fluorescent tube 1, a lighting circuit housing portion 4 that houses the lighting circuit 3, and the globe 2. It comprises an engaging claw 5 that is fixed to the lighting circuit housing portion 4 and a base 6.

  A power supply terminal of the lighting circuit 3 is connected to the base 6. The output terminal of the lighting circuit 3 is connected to the electrode of the fluorescent tube 1. In the fluorescent lamp 10, the fluorescent tube 1 is lit by the action of the lighting circuit 3 when the base 6 is inserted into a socket suitable for the fluorescent lamp 10 and a power source (for example, AC 100 V commercial power source) is connected. For example, a high-frequency lighting circuit is used as the lighting circuit 3. Some bulb-type fluorescent lamps do not have globe 2 (D type), but many have globe 2 in order to match the light emitting surface shape and color rendering effect of incandescent bulbs.

  In the first embodiment, the engaging claw 5 is made of resin and is formed integrally with a part of the lighting circuit housing portion 4. The engaging claw 5 is engaged with the inner surface near the opening of the globe 2.

  The globe 2 is made of glass. The opening 2 a of the globe 2 has a convex shape in which the end of the opening protrudes out of the globe 2, and is formed so as to fit into the recess of the lighting circuit housing portion 4. The engagement surface 2b of the globe 2 is the inner surface of the globe 2 adjacent to the opening 2a. An adhesive surface 4 a is formed on the periphery of the base portion of the lighting circuit housing portion 4 so as to be in close contact with the outer surface around the opening 2 a of the globe 2.

  Two engaging claws 5 are provided directly in the lighting circuit housing portion 4 and are in a rotationally symmetrical position (a diagonal position of the opening 2a) around the opening 2a of the globe 2 (see FIG. 2).

  The claw portion of the engagement claw 5 has a slope inclined in a direction from the center of the circle toward the circumference. When the globe 2 is brought closer to the lighting circuit housing portion 4 by inserting the fluorescent tube 1 into the opening 2a of the globe 2 from the state where the globe 2 is separated from the lighting circuit housing portion 4, the opening 2a of the globe 2 is obtained. Hits the slant surface of the engaging claw 5 and pushes the engaging claw 5. At this time, the inclined surface of the engaging claw 5 is displaced in the opening surface of the globe 2 by receiving the force in the center direction of the opening 2a, and the engaging claw 5 is deformed. The engaging claw 5 has elasticity, and a force for restoring deformation is urged.

  When the globe 2 is closed, the opening 2 a of the globe 2 passes over the claw slope of the engagement claw 5 and the engagement claw 5 returns to its original shape, so that the engagement surface 2 b is fixed by the engagement claw 5. The globe 2 is in contact with the adhesive surface 4 a of the lighting circuit housing portion 4. The engaging surface 2b is supported by the engaging claw 5, and the movement in the direction in which the globe 2 is pulled away from the lighting circuit housing portion 4 is suppressed.

  In advance, an adhesive is applied to the bonding surface 4 a of the lighting circuit housing portion 4. The globe 2 and the lighting circuit accommodating portion 4 can be divided into two methods by bonding the adhesive surface 4a and the engaging surface 2b with an adhesive when the globe 2 is closed and suppressing the engaging claw 5 on the engaging surface 2a. Fixed at the same time.

  As described above, according to the fluorescent lamp 10 of the present invention, by providing the engaging claw 5 in the lighting circuit housing portion 4, in addition to fixing with a conventional adhesive, fixing by engagement can be performed simultaneously. Even when the bonding strength varies due to the difference in the bonding conditions, the lighting circuit housing portion 4 and the globe 2 are securely fixed, so that the reliability of fixing the globe 2 is improved.

  Furthermore, the engaging claw 5 is made of resin and can be integrated with the lighting circuit housing portion 4, and is easy to manufacture.

  The engaging claw 5 may be an elastic metal. However, in the case of metal, it is not integrated with the lighting circuit housing portion 4 but is fixed and supported by the lighting circuit housing portion 4.

  Although FIG. 2 of the top view which shows the structural example of the fluorescent lamp 10 which concerns on Embodiment 1 showed the case where the engagement nail | claw 5 was provided in the lighting circuit accommodating part 4 on 2 diagonal lines (rotationally symmetric position), If there is an effect of preventing the globe 2 from falling off, the number of the engaging claws 5 may be one. Preferably, the number of the engaging claws 5 is two or more, but may be three or more. In particular, when the number of the engaging claws 5 is three, the number is the minimum number of the globe 2 that is stable. In addition, it is desirable to provide the engaging claws 5 at rotationally symmetrical positions around the opening 2a of the globe 2 because the globe 2 is most difficult to be detached and stable.

  In FIG. 1 of a partially cutaway view showing a configuration example of the fluorescent lamp 10 according to the first embodiment, the globe 2 has a G shape (ball bulb shape), but the same applies to an A shape (general bulb shape), a ref shape, and the like. Applicable to.

(Embodiment 2)
The second embodiment of the present invention is a case where the engaging claw 5 is made of a resilient metal and is engaged with the inner surface near the opening of the globe 2. FIG. 3 is a partial cutaway view showing a configuration example of the fluorescent lamp 10 according to the second embodiment. FIG. 4 is a plan view showing a configuration example of the fluorescent lamp 10 according to the second embodiment.

  As shown in FIG. 3, the fluorescent lamp 10 includes a fluorescent tube 1, a globe 2 that covers the fluorescent tube 1, a lighting circuit 3 that lights the fluorescent tube 1, a lighting circuit housing portion 4 that houses the lighting circuit 3, and the globe 2. It comprises an engaging claw 5 that is fixed to the lighting circuit housing portion 4 and a base 6.

  The globe 2 is made of glass. The opening 2 a of the globe 2 is inclined with respect to the direction in which the globe 2 is closed, and has a convex shape with respect to the lighting circuit housing portion 4. The engagement surface 2b of the globe 2 is the inner surface of the globe 2 around the opening 2a. An adhesive surface 4 a is formed on the periphery of the base portion of the lighting circuit housing portion 4 so as to be in close contact with the globe 2. In the example of FIG. 3, the engagement surface 2b and the bonding surface 4a are opposed to each other. The lighting circuit housing portion 4 is formed with a recess so that the periphery of the opening 2 a of the globe 2 is fitted.

  The engaging claw 5 is fixed to and supported by the lighting circuit housing portion 4. The engaging claw 5 is made of an elastic metal, and the tip is covered with, for example, foamed resin. This is to prevent the contacted metal from damaging the opening 2a and the inner surface of the glass globe 2 when the globe 2 is held on the lighting circuit housing portion 4 and held. The engaging claw 5 has a slope inclined in a direction from the center of the circle to the circumference. Three engaging claws 5 are provided directly in the lighting circuit housing portion 4 and are in a rotationally symmetrical position around the opening 2a of the globe 2 (see FIG. 4).

  The engagement surface 2b of the globe 2 is adjacent to the opening 2a. An adhesive surface 4 a is provided on the peripheral edge of the base portion of the lighting circuit housing portion 4 at a position facing the engagement surface 2 b of the globe 2.

  An adhesive is applied to the bonding surface 4 a to fix the globe 2 to the lighting circuit housing portion 4. When fixing, the engaging claw 5 and the opening 2a are fitted together.

  The opening 2 a is fitted between the engaging claw 5 and the lighting circuit housing portion 4. First, one side of the opening 2 a is fitted between the one engaging claw 5 and the lighting circuit housing portion 4 so as to match the globe 2 from the oblique direction. The engaging claw 5 and the lighting circuit housing portion facing the opposite side of the opening 2a while displacing the globe 2 by applying a force in the center direction to the engaging claw 5 so that the globe 2 is perpendicular to the lighting circuit housing portion 4. Fit between 4. If the size of the circle represented by the tip of the engagement claw 5 when the engagement claw 5 is displaced by applying a force in the direction of the center of the circle is smaller than the circle size of the opening 2a, the engagement claw 5 is opened. It can be put in from the part 2a.

  The engaging claw 5 is made of an elastic metal, and is displaced in the direction in which the force is applied, and a force for restoring in the opposite direction works. When all the engaging claws 5 are put in from the opening 2 a of the globe 2 as described above, the globe 2 is pressed against the lighting circuit housing portion 4 and held by the elasticity of the engaging claws 5. Since the plurality of engaging claws 5 are arranged around the opening 2a, the movement in the direction in which the globe 2 is pulled away from the lighting circuit housing portion 4 is suppressed. Even if the globe 2 is pulled with a little force, it cannot be removed from the lighting circuit housing portion 4. The elasticity of the engaging claw 5 is set to a strength that does not drop at least due to the weight of the globe 2.

  As described above, according to the fluorescent lamp 10 of the present invention, by providing the engaging claw 5 in the lighting circuit housing portion 4, in addition to fixing with a conventional adhesive, fixing by engagement can be performed simultaneously. Even when the bonding strength varies due to the difference in the bonding conditions, the lighting circuit housing portion 4 and the globe 2 are securely fixed, so that the reliability of fixing the globe 2 is improved.

  Although FIG. 4 of the top view which shows the structural example of the fluorescent lamp 10 which concerns on Embodiment 2 showed the case where the three engaging claws 5 were provided in the lighting circuit accommodating part 4, if it has the fall-off prevention effect of a glove, it will be related. One nail 5 may be provided. Preferably, the number of the engaging claws 5 is two or more, but may be three or four or more. In addition, it is desirable to provide the engaging claws 5 at rotationally symmetrical positions around the opening 2a of the globe 2 because the globe 2 is most difficult to be detached and stable.

  In FIG. 3 of a partially cutaway view showing a configuration example of the fluorescent lamp 10 according to the second embodiment, the globe 2 has a G shape (ball bulb shape), but the same applies to an A shape (general bulb shape), a ref shape, and the like. Applicable to.

  1 can be formed of metal, and the engaging claw 5 of FIG. 3 can be formed integrally with a part of the lighting circuit housing portion 4 with resin. Is also possible. Further, the direction in which the engaging claw 5 is deformed is not limited to the direction toward the center of the fluorescent lamp 10, but may be configured to be deformed in a direction offset from the center. Further, the engaging claw 5 can be configured to be deformed in the direction of the opening surface of the globe 2 by making the shape of the engaging claw 5 into a shape like an arrow blade in a plan view.

  Although the embodiments of the present invention have been described, the present invention is not limited to the above-described embodiments, and various embodiments are possible within the scope of the present invention.

It is a fragmentary broken view which shows the structural example of the fluorescent lamp which concerns on Embodiment 1 of this invention. It is a top view which shows the structural example of the fluorescent lamp lamp which concerns on Embodiment 1 of this invention. It is a partially broken figure which shows the structural example of the fluorescent lamp lamp which concerns on Embodiment 2 of this invention. It is a top view which shows the structural example of the fluorescent lamp lamp which concerns on Embodiment 2 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fluorescent tube 2 Globe 2a Opening 2b Engagement surface 3 Lighting circuit 4 Lighting circuit accommodating part 4a Adhesion surface 5 Engagement claw 6 Base 10 Fluorescent lamp

Claims (5)

A globe covering a fluorescent tube;
A housing portion for housing a lighting circuit for lighting the fluorescent tube;
An engaging portion that is provided in the housing portion, engages with an inner surface near the opening of the globe, and holds the globe in the housing portion;
A fluorescent lamp with a built-in lighting circuit.   The fluorescent lamp with built-in lighting circuit according to claim 1, wherein the globe is made of glass.   3. The fluorescent lamp with built-in lighting circuit according to claim 1, wherein the number of the engaging portions is two or more and is located at a rotationally symmetrical position around the opening of the globe.   The fluorescent lamp with built-in lighting circuit according to any one of claims 1 to 3, wherein the engaging portion is made of resin and is formed integrally with a part of the housing portion.   The fluorescent lamp with a built-in lighting circuit according to any one of claims 1 to 3, wherein the engaging portion is made of an elastic metal.

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