JP3245868B2 - Round fluorescent lamp - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a round fluorescent lamp which can be easily attached and detached.

[0002]

2. Description of the Related Art Conventionally known round fluorescent lamps are based on JIS.
G10 shown in C7709 “Electric bulb base and receiver”
Has q base. FIG. 5 shows a cross section of the round fluorescent lamp passing through the base. At the center of the base 2 of the round fluorescent lamp 1, 45 ° with respect to the tube plane of the round fluorescent lamp 1.
A lamp pin 3 protruding in a direction inclined at an angle is provided.

FIG. 6 shows an example of a round fluorescent lamp luminaire using such a round fluorescent lamp 1. In this round fluorescent lamp lighting fixture, a lighting fixture body 4 is provided with lighting electric components such as a high-frequency lighting device, and a round fluorescent lamp socket 5 and a lamp support 6 are attached. The fluorescent lamps 1 and 1 ′ are mounted on the round fluorescent lamp socket 5 and supported by the round fluorescent lamp socket 5 and the lamp support 6, and the round fluorescent lamp 1 is mounted on the shade 7 mounted on the lighting fixture body 4. , 1 ′.

[0004] This round fluorescent lamp illuminating device includes a round fluorescent lamp 1.
Since the lamp pin 3 provided on the base 2 is inclined 45 degrees with respect to the tube plane of the round fluorescent lamp 1 and is directed toward the center, the base 2 is inclined 45 degrees outside when the round fluorescent lamp 1 is attached or detached. It is necessary to move in the direction. Therefore, the round fluorescent lamp 1
Is complicated and the operability is not good. In addition, at least a space for moving the round fluorescent lamp 1 and a space where a finger can be inserted at the time of the attaching / detaching operation must be ensured between the round fluorescent lamp 1 and the shade 7. growing. Further, in a round fluorescent lamp luminaire having round fluorescent lamps 1 and 1 'having different diameters, they may interfere with each other when the lamps are replaced, and it is necessary to take a sufficient distance due to the height relationship between the round fluorescent lamps. There was a problem that the height as a lighting fixture was increased.

On the other hand, a large number of round fluorescent lamps have been standardized and used, and a large number of round fluorescent lamp luminaires based on such a round fluorescent lamp 1 have been used. It is important that it can be used for round fluorescent lighting fixtures.

[0006]

The problem to be solved is that the lighting fixture can be used in a conventional round fluorescent lamp illuminating fixture that is premised on a round fluorescent lamp, but has good operability of attachment and detachment. An object of the present invention is to realize a round fluorescent lamp that can be downsized.

[0007]

SUMMARY OF THE INVENTION The present invention is directed to a round fluorescent lamp having a G10q base in which a bulb end is formed to be thinner than a light emitting portion other than the end and a lamp pin is implanted. A base is attached to the bulb so as to be rotatable at least in the range of 45 ° to 90 ° with respect to the center of the tube plane. One of the bulb end and the inner surface of the base has an engaging projection, the other has an engaging recess, and the lamp pin has The state of projecting at an angle of 45 degrees toward the center with respect to the tube plane and 90 degrees with respect to the tube plane
It is formed in a positional relationship of engaging with each other in at least two states of the degree.

[0008]

1 to 4 show an embodiment of the present invention, which will be described below with reference to the drawings.

In this round fluorescent lamp 1, the base 2 is attached to the bulb 9 so that the lamp pin 3 can be rotated within the range of 45 degrees to 90 degrees with respect to the tube plane as in the prior art.

The base 2 of the round fluorescent lamp 1 has a lamp pin 3
Is provided with a flat lamp pin disposing surface 8 on which is implanted. The bulb 9 which is formed of a glass of the round fluorescent lamp 1 in the shape of a circular tube and has a fluorescent substance accommodated therein is bent in a substantially circular shape so that both ends thereof are in close proximity to each other. The end of the bulb 9 is a base mounting part 10 formed thinner than the light emitting part other than the end, and the base 2 is rotatably mounted.

On the periphery of the base mounting portion 10 of the bulb 9, a rib-shaped engaging projection 11 in the bulb tube axial direction is provided so as to project in a direction perpendicular to the tube plane of the round fluorescent lamp 1. On the other hand, on the inner surface of the base 2, there are provided two engagement recesses 12 which engage with the engagement projections 11 of the valve 9 at two positions at an angle of 45 degrees to each other. When the base 2 rotates, when the lamp pin 3 is in a state of 45 degrees and 90 degrees with respect to the tube plane as in the related art, the engaging projection 11 of the bulb 9 engages with the engaging recess 12 of the base 2. The rotation is stopped together.

The base 2 covers a base body 13 of a resin molded product and a base cover 14 on a base mounting portion 10 of a valve 9.
The base 1 of the valve 9 is connected to each other by the
It is attached to 0. A lamp pin mounting surface 8 is formed on the base body 13, and four lamp pins 3 are implanted. The four lamp pins 3 are connected by lead wires 15 to filaments (not shown) provided on the bulb 9.

As shown in FIG. 2, this round fluorescent lamp 1
If the rotation of the base 2 is set so that the lamp pin 3 is inclined at 45 degrees with respect to the tube plane as in the related art, it can be used for a round fluorescent lamp illuminating device based on a conventional round fluorescent lamp.

On the other hand, the base 2 of the round fluorescent lamp 1 is
As shown in FIG. 4, if the lamp pin 3 is set at 90 degrees with respect to the plane of the tube, as shown in FIG.
The mounting and dismounting operation can be performed only by moving the tube in the direction of 90 degrees with respect to the plane of the tube of the round fluorescent lamp 1, which improves the operability and eliminates the need for a space only for the operation. Can be reduced in size. In addition, this round fluorescent lamp 1
In this case, the base 2 is made of resin, and the base 2 is elastically deformed at the time of rotation, so that an appropriate operation feeling can be given during the rotation operation.

The engaging projection 11 and the engaging recess 12 are
What is necessary is just to provide each in either the base 2 or the valve 9. In addition, the position at which it is provided only needs to be able to obtain at least the above two states.

[0016]

As described above, the round fluorescent lamp of the present invention can be used for a round fluorescent lamp on the premise of a conventional round fluorescent lamp. Becomes possible

[Brief description of the drawings]

FIG. 1 is a sectional front view of a round fluorescent lamp of the present invention.

FIG. 2 is a cross-sectional front view of a state in which the round fluorescent lamp of the present invention is used in a conventional round fluorescent lamp lighting fixture.

FIG. 3 is an exploded perspective view of a main part of the round fluorescent lamp of the present invention.

FIG. 4 is a cross-sectional front view of a main part of a round fluorescent lamp lighting fixture using the round fluorescent lamp of the present invention.

FIG. 5 is a sectional front view of a conventional round fluorescent lamp not using the present invention.

FIG. 6 is a cross-sectional front view showing a conventional round fluorescent lamp luminaire using a round fluorescent lamp without using the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Round fluorescent lamp 2 Base 3 Lamp pin 9 Bulb 10 Base mounting part 11 Engagement projection 12 Engagement recess

Continuation of the front page (56) References JP-A-2-86025 (JP, A) JP-A-57-121103 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H01J 5 / 50 H01J 61/32

Claims (1)

(57) [Claims] 1. A round fluorescent lamp having a G10q base in which an end portion of a bulb is formed thinner than a light emitting portion other than the end portion and in which a lamp pin is implanted, wherein a projection direction of the lamp pin is at least a center direction with respect to a tube plane. A base is attached to the bulb so as to be rotatable in a range of 45 degrees to 90 degrees, an engagement projection is provided on one of the end of the bulb and the inner surface of the base, an engagement recess is provided on the other side, and a lamp pin is provided in the center direction with respect to the tube plane. A round fluorescent lamp formed so as to engage with each other in at least two states of a state of protruding at an angle of degrees and a state of 90 degrees with respect to a tube plane.