JPH03102737A - Fluorescent lamp - Google Patents

Abstract

PURPOSE:To change the direction of a light emitting tube easily to dim by dividing a base into a light emitting tube supporting part and a base pin fitting part so that the light emitting tube can rotate to the axial direction thereof. CONSTITUTION:In a fluorescent lamp, of which light emitting tube 1 is bent more than one time, at least, within one flat surface and the end of the light emitting tube 1 is supported with a base 7 having base pins 3 so that an axis of the fluorescent lapp coincides with an axis of the base pin 3, the base 7 consists of a light emitting tube supporting part 8 for supporting the light emitting tube 1 and a base pin fitting part 9 to which the base pins are fitted. These light emitting tube supporting part 8 and the base pin fitting part 9 are fitted so that the light emitting tube 1 can be turned around of the axial direction. Consequently, the illuminance can be changed by holding the light emitting tube l and rotating it to the axial direction at the appropriate angle. The direction of the light emitting tube 1 can be easily changed to dim, and it is possible to hold the light emitting tube 1 without applying the strong force to the connected part at the time of fitting the light emitting tube 1.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a fluorescent lamp which is made more compact by bending the arc tube.

[Conventional technology]

Modern fluorescent lamps are required to be more compact and have higher brightness from the viewpoint of interior design.

In order to meet such demands, the arc tube is formed into a curved shape, and FIG. 6 shows a specific example thereof.

That is, the FDL type (name based on the Light Bulb Industry Association standards) is formed so that the entire outer shape is three-dimensional while alternating the bending direction.

On the other hand, in the FML type and FPL type, the arc tube is bent within the same plane so that the entire outer shape is planar.

7 and 8 are a plan view and a bottom view of the FML type. As is clear from these figures, the arc tube 1 is bent three times within the same plane, and its end portion is supported by a cap that is integrally molded with resin and has a cap pin 3 attached thereto. A reflector plate 4 is attached to the cap 2 or the arc tube 1 in order to improve illumination efficiency.

Such fluorescent lamps are usually used by inserting the cap pin 3 into a socket installed on the ceiling or wall surface, and fixing the lamp with a single touch.

[Problem to be solved by the invention]

Incidentally, in terms of interior design, it is not necessarily the case that the intensity of illumination in each room is uniform; it is necessary to change the amount of light depending on the purpose or environment of each room.

However, with compact fluorescent lamps like the one above,
Since the direction of the arc tube cannot be changed after it is inserted into the socket and fixed, it has been impossible to easily change the illumination intensity. For example, as shown in FIG. 9, if the orientation of the arc tube 1 when inserted into the socket and fixed is parallel to the irradiation surface 5, then change the orientation of the arc tube 1 to adjust the illumination intensity. I couldn't make it change.

When installing or replacing the arc tube 1, depending on the mounting position and direction of the socket, the arc tube 1 may be held horizontally as shown in Fig. 10, that is, the force may be applied in the direction of the arrow. You may have to hold the arc tube.

However, the connecting portion 6 formed between the two arc tubes 1 is a very weak portion, and there is a risk that it will be damaged depending on the force applied when gripping it.

The present invention has been made in view of the above circumstances, and allows for dimming by simply changing the direction of the arc tube, and also allows for a method that does not apply strong force to the joints when installing or replacing the arc tube. The present invention aims to provide a fluorescent lamp whose arc tube can be held in different orientations.

[Means to solve the problem]

As a means for solving the above problems, the present invention bends the arc tube at least once in the same plane, and bends the end of the arc tube so that the axis of the fluorescent lamp and the axis of the cap pin coincide. , a fluorescent lamp supported by a cap having a cap pin, wherein the cap is composed of an arc tube support part that supports the arc tube, and a cap pin mounting part to which the cap pin is attached;
The arc tube support part and the base pin attachment part are assembled so that the arc tube can rotate about its axial direction.

[For production]

In the above configuration, if you want to change the illumination intensity,
All you have to do is hold the arc tube and rotate it around the axis by an appropriate angle. Then, the base pin attachment part will not rotate,
Since only the arc tube and the arc tube support rotate, the illumination intensity on the irradiation surface can be easily adjusted.

Also, when installing or replacing the arc tube,
Attach the arc tube support and keep it at an angle suitable for replacement work. Then, hold the arc tube in such a direction that no force is applied to the joint, attach it to the arc tube support, and then
All you have to do is return the arc tube support to its original angle.

〔Example〕

Embodiments of the present invention will be described below with reference to FIGS. 1 to 4.

In FIG. 1, the cap 7 is divided into an arc tube support portion 8 that supports the arc tube 1 and a cap pin attachment portion to which the cap pin 3 is attached.

The arc tube support section 8 is composed of an upper cover 10 and a lower cover 11, and a hole 11a is provided in the bottom surface of the lower cover 11. The arc tube 1 is attached to the upper cover 10.

On the other hand, the base pin mounting portion 9 is composed of a mounting seat 12 and a socket protection cover 13 that are integrally molded. A base pin 3 is attached to the bottom surface 12a of the mounting seat 12,
The cap pin 3 and the filament 14 of the arc tube 14 are connected by a lead wire 15.

The upper part of the mounting seat 12 passes through the hole 11a and is located inside the lower cover 11, so that the mounting seat 12 can rotate approximately 180'' in the direction of the arrow in FIG.
Since rotation of 180° or more is unnecessary, stopper 12b on the mounting seat 12 side and stopper 1lb on the lower cover 11 side.
Therefore, further rotation is restricted.

Next, how to use this embodiment configured as described above will be explained.

In Figure 1, first, a socket 1 installed on a wall etc.
When the cap pin 3 is inserted into the socket 6, the entire fluorescent lamp is fixed to the socket 16 with one touch.

Next, hold the arc tube 1 at a suitable location and rotate it around the axial direction. Then, since the arc tube support part 8 is configured to be rotatable with respect to the base pin attachment part 9,
The arc tube support portion 8 and the arc tube 1 rotate together.

Therefore, as shown in FIG.
You can freely adjust the angle θ between the irradiation and the 5
The illumination intensity can be varied in various ways. In order to reliably maintain the posture of the arc tube 1 after rolling over, the periphery of the hole 11a in FIG. It is preferable to make contact with a certain degree of frictional force. Alternatively, it is also possible to provide tooth-like meshing parts on the circumferential surface of the hole 11a and the tip of the stopper 12b, respectively, so that the rotation can be performed in stages.

FIG. 4 is a characteristic diagram of the FML type fluorescent lamp when θ in FIG. 3 is changed in this manner. That is, assuming that the relative illuminance at θ-0° is 100%, it can be seen that the relative illuminance decreases to about 10% at θ-90@. Therefore, θ in FIG.
This relative illuminance can be adjusted in various ways by appropriately changing the value in the range of Oo to 90@.

FIG. 5 is a characteristic diagram of the t-eye illumination level comparing an FML type fluorescent lamp and an FDL type fluorescent lamp of different sizes from those shown in FIG. 4.

The reason why the relative illuminance of the FDL type fluorescent lamp does not change so much is because the entire outer shape of the arc tube is three-dimensional, as shown in FIG. Therefore, it can be seen that for the FDL type, even if the arc tube is configured to be rotatable, no great effect can be expected regarding dimming.

Next, we will explain how to install or replace the arc tube 1. After rotating the arc tube support part 8 to an appropriate angle, inserting the arc tube 1, and then returning the arc tube 1 to its original angle. It is possible to prevent a large force from being applied to the connecting portion of the arc tube 1. For example, in the case of Fig. 10, the arc tube 1 is almost horizontal (θ-0°), but it is turned vertically (θ-90'), and the lower arc tube is grasped. In this way, no force is applied to the connecting portion 6.

Note that it is preferable that the reflector plate 4 be attached to the arc tube support 48 or the arc tube 1 so that it can rotate together with the arc tube 1, as shown in FIG. This is because the illumination efficiency cannot be said to be sufficient if the counter board 4 is attached to another member to ensure a sufficient distance from the light emitting tube 1 so that only the light emitting tube 1 can rotate.

〔Effect of the invention〕

As explained above, according to the present invention, the cap is divided into the arc tube support part and the cap pin attachment part, and the arc tube is configured to be rotatable in its axial direction, so that the arc tube can be easily aligned with respect to the irradiation surface. ! 11, the light can be dimmed, and these operations can be performed without fear of damaging the joints when attaching or replacing the arc tube.

[Brief explanation of drawings]

Fig. 1 is a longitudinal diagram showing an embodiment of the present invention, and Fig. 2 is a longitudinal diagram showing an embodiment of the present invention.
Figure 3 is an explanatory diagram showing the usage status of the lamp in Figure 1, Figures 4 and 5 are characteristic diagrams of the lamp in Figure 1, and Figure 6 is a diagram of the conventional fluorescent lamp. FIGS. 7 and 8 are perspective views showing the external shapes of each type, FIGS. 7 and 8 are plan and bottom views of the conventional example, and FIGS. 9 and 10 are explanatory views of problems in the conventional example. 1... Arc tube, 3... Base pin, 4... Reflector plate,
7... Cap, 8... Arc tube support part, 9... Eyelet pin attachment part.

Claims (1)

[Claims] 1. The arc tube is bent at least once in the same plane, and the end of the arc tube is bent so that the axis of the fluorescent lamp and the axis of the cap pin coincide with each other. In the fluorescent lamp, the cap includes an arc tube support part that supports the arc tube, and a cap pin attachment part to which the cap pin is attached, and the arc tube rotates around its axial direction. A fluorescent lamp characterized in that the arc tube support part and the base pin attachment part are assembled to enable movement. 2. The fluorescent lamp according to claim 1, wherein the fluorescent lamp is provided with a reflective member that reflects light from the arc tube, and the reflective mounting member is rotatable together with the arc tube.