JPH06342642A - Bulb type fluorescent lamp - Google Patents

Abstract

PURPOSE:To restrict the whitening of a globe and reduction in flux of light due to the whitening by restricting emission of low molecular siloxane in a silicone adhesive. CONSTITUTION:A case 2 is fixed to the opening part of a globe 1 having a closed part on one end and an opening part on the other end, and an envelope 3 is formed thereby. A holder 5, to which the both end parts of a double-U shape phosphor tube 4 are fixed, is provided on the envelope 3. A wall 6 partitioning the case 2 and a holder 5 in the axial direction of the case 2 is formed around the entire circumference of the inner circumferential surface of the case 2. A silicone adhesive 8 is injected into a groove formed by the wall 6 and the case 2, and the opening part of the globe 1 is inserted into the groove 7. The globe 1 and the case 2 are thus fixed to each other by the silicone adhesive 8 injected into the groove 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-ballasted fluorescent lamp.

[0002]

2. Description of the Related Art In a conventional compact fluorescent lamp, an opening of a globe 1 is inserted into a groove 11 formed by a case 12 and a holder 5 as shown in FIG. The opening of the globe 1 and the opening of the case 12 are fixed by the agent 8. In such a bulb-type fluorescent lamp, depending on the shapes of the case 12 and the holder 5, the silicone adhesive 8 for fixing the case 12 and the globe 1 must be used more than necessary.

[0003]

When the amount of the silicone adhesive 8 used is large, the amount of low molecular siloxane released from the silicone adhesive 8 by the heat of the lamp during lighting increases. As a result, there is a problem that the globe 1 becomes cloudy and the luminous flux of the lamp is extremely reduced. Since the amount of the low-molecular-weight siloxane released is in proportion to the amount of the silicone adhesive 8 used, it is necessary to reduce the amount of the silicone adhesive 8 used in order to reduce the amount of the low-molecular siloxane released.

The present invention has been made to solve the above problems, and the silicone adhesive can be used in an amount necessary for fixing the case and the glove, thereby releasing the low molecular siloxane. The present invention provides a bulb-type fluorescent lamp capable of suppressing the cloudiness of the globe due to the above and the reduction of the luminous flux due to the cloudiness.

[0005]

According to another aspect of the present invention, there is provided a bulb-type fluorescent lamp, wherein a case is fixed to the opening of a globe having a closed portion at one end and an opening at the other end to form an envelope. In a bulb-shaped fluorescent lamp provided with a holder in which a fluorescent tube is fixed in an envelope, on the inner peripheral surface of the case,
A wall is provided to partition the case and the holder in the axial direction of the case, the opening of the globe is inserted into the groove formed by the case and the wall, and the silicone adhesive injected into the groove is used. The case and the glove are fixed to each other.

In the bulb-type fluorescent lamp of the present invention, an envelope is constructed by fixing a case to the opening of a globe having a closed portion at one end and an opening at the other end. In a bulb-shaped fluorescent lamp provided with a holder to which a fluorescent tube is fixed, a wall for partitioning the case and the holder in the axial direction of the case is provided on the inner peripheral surface of the case, and the wall and the holder are provided. The opening of the glove is inserted into the formed groove, and the case and the glove are fixed to each other by the silicone adhesive injected into the groove.

[0007]

According to the present invention, since the amount of silicone adhesive used can be adjusted depending on the position of the wall provided on the case, it is possible to fix the glove and the case with the minimum necessary amount of silicone adhesive. You can

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 and 2, in the bulb-type fluorescent lamp of one embodiment of the present invention, a case 2 is fixed to the opening of a globe 1 having a closed portion at one end and an opening at the other end. And the envelope 3 is configured. Inside the envelope 3, a holder 5 in which both ends of a double U-shaped fluorescent tube 4 are fixed
Is provided. A wall 6 for partitioning the case 2 and the holder 5 in the axial direction of the case 2 is formed on the entire inner circumference of the case 2. The silicone adhesive 8 is injected into the groove 7 formed by the wall 6 and the case 2, and the opening of the globe 1 is inserted into the groove 7, so that the opening of the globe 1 and the opening of the case 2 are made of silicone. It is fixed with an adhesive 8.

A cap 9 is provided on the protruding portion of the case 2. The lighting circuit 10 is provided in the case 2.

In the light bulb type fluorescent lamp of this embodiment, a wall 6 for partitioning the case 2 and the holder 5 in the axial direction of the case 2 is provided on the inner peripheral surface of the case 2, whereby the amount of the silicone adhesive 8 used is increased. Can be set to the minimum amount necessary for fixing the globe 1 and the case 2, and therefore, the cloudiness of the globe 1 due to the emission of the low-molecular siloxane that occurs during the lighting of the lamp and the reduction of the luminous flux due to this cloudiness are suppressed. Is what you can do.

FIG. 3 shows another embodiment of the present invention, in which the silicone adhesive 8 is injected into the groove 11 formed by the wall 6 and the holder 5, and the groove 11 is opened into the groove 11. The portion is inserted, and the silicone adhesive 8 injected into the groove 11 fixes the opening of the globe 1, the case 2 and the holder 5 to each other.

In addition to the effects of the above-described embodiment, the self-ballasted fluorescent lamp of this embodiment has only the case 2 and the globe 1 by injecting the silicone adhesive 8 into the groove 11 formed by the wall 6 and the holder 5. In addition, the holder 5 can be firmly fixed at the same time.

In the above embodiment, the wall 6 is formed on the inner peripheral surface of the case 2 over the entire circumference along the opening of the case 2, but the inner peripheral surface of the case 2 is covered by the wall 6. Multiple walls may be provided along the opening.

[0015]

As described above, in the light bulb type fluorescent lamp of the present invention, since the amount of the silicone adhesive required for fixing the globe and the case can be set to the minimum required amount, the silicone is used. Adhesives can be used effectively, and whitening of the globe due to low molecular weight siloxane in the silicone adhesive released by the heat of the lamp during lighting and reduction of luminous flux due to this whitening can be suppressed. Is.

[Brief description of drawings]

FIG. 1 is a cutaway front view of a main part of a bulb-type fluorescent lamp according to an embodiment of the present invention.

FIG. 2 is a plan view of the case of the same bulb-shaped fluorescent lamp.

FIG. 3 is a cutaway front view of a main part of a bulb-type fluorescent lamp according to another embodiment of the present invention.

FIG. 4 is a cutaway front view of a main part of a conventional bulb-type fluorescent lamp.

[Explanation of symbols]

 1 Globe 2 Case 3 Envelope 4 Double U-shaped Fluorescent Tube 5 Holder 6 Wall 7, 11 Groove 8 Silicone Adhesive

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kenji Nakano 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electronics Industrial Co., Ltd.

Claims (2)

[Claims] 1. A holder in which a case is fixed to the opening of a globe having a closed portion at one end and an opening at the other end to form an envelope, and a fluorescent tube is fixed inside the envelope. In the provided bulb-type fluorescent lamp, a wall that partitions the case and the holder in the axial direction of the case is provided on the inner peripheral surface of the case, and the groove of the globe is formed in the groove formed by the case and the wall. A bulb-type fluorescent lamp characterized in that the case and the globe are fixed to each other with a silicone adhesive injected into the groove. 2. A holder in which a case is fixed to the opening of a globe having a closed portion at one end and an opening at the other end to form an envelope, and a fluorescent tube is fixed inside the envelope. In the provided bulb-type fluorescent lamp, a wall that partitions the case and the holder in the axial direction of the case is provided on the inner peripheral surface of the case, and the groove of the globe is formed in the groove formed by the wall and the holder. A bulb-type fluorescent lamp characterized in that the case and the globe are fixed to each other with a silicone adhesive injected into the groove.