JPH0124841Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a sealed beam light bulb for projecting light.
Specifically, the object is to provide a novel sealed beam light bulb for projecting light that is easy to attach and detach from a socket.

Sealed beam floodlight bulbs are used for a variety of lighting purposes, and may be mounted in a fixture with a cylindrical inner surface having an inner diameter only slightly larger than the outer diameter of the bulb, or alternatively may be recessed into a wall. It is often used as a. In such cases, even if the outer diameter of the light bulb is large enough for a person to fit their hand into, there is not enough space between the mounting part and the outer circumference of the light bulb to hold the light bulb's base into the socket. The bulb could not be screwed in, which could cause the bulb to fall off or cause poor contact during use. Furthermore, since there was no handhold when removing it from the socket, the work efficiency was extremely poor. This situation also applies to cases where the outer diameter of the light bulb is so large that it is impossible to hold the outer periphery by hand.

Therefore, the present invention has developed a new sealed beam light bulb for floodlighting that has a screw-in base and has an appropriate grip on the front surface of the lens to make it easier to attach and remove it from the socket. This is a sealed beam light bulb for floodlighting, in which a glass lens is welded to the opening edge of a glass reflector and a screw-in base is attached to the rear of the bulb, with a light source structure built into the lens. , a plurality of protrusions arranged on the circumference with a diameter of 50 to 140 mm are formed on the front surface of the lens, and the protrusion height of the protrusions from the lens surface is within the range of 1.5 to 5.0 mm, and The surface is characterized by forming a curved surface and being continuous with the lens surface.

The details of the sealed beam light bulb for projection according to the present invention will be explained below with reference to the embodiments shown in the accompanying drawings.

1 in the figure is a sealed beam light bulb for projecting light according to the present invention. 2 is a glass reflector, and a reflective film is provided on its inner surface by aluminum vapor deposition or the like. On the back of the top of the reflector 2 is a ferrule 3,
3' is melt-sealed, internal lead wires 4, 4' are brazed to the ferrules 3, 3', and a filament 5 is stretched between the internal lead wires 4, 4'. A lens 6 made of glass similar to that of the reflector 2 is melt-sealed and bonded to the front opening edge of the reflector 2. A screw-in type cap 8 is fixed to the thus formed valve 7.

Further, on the front surface of the lens 6, small protrusions 9, 9, 9, which are continuous with the surface of the lens 6 with a curved surface, are protrudingly provided. And these protrusions 9, 9, 9 are the lens 6
They are arranged at approximately equal intervals on a circumference with a diameter of 50 to 140 mm, with the center near the center. Further, the amount h of protrusion of each protrusion 9 from the surface of the lens 6 is within the range of 1.5 to 5.0 mm. Incidentally, once the amount of protrusion is determined, the length and width of the protrusion 9 are necessarily determined to be necessary and sufficient values to obtain the amount of protrusion, but it is preferable that the length and width are each within the range of 3 to 10 mm. .

As described above, in the sealed beam light bulb 1 for projecting the present invention, since the above-mentioned protrusion 9 is formed on the surface of the lens 6, when the light bulb 1 is screwed into the socket, the lens 6 Even when there is no space around it, the fingers of the hand can be placed on the protrusion 9, and the cap 8 of the light bulb 1 can be screwed into the socket with the necessary and sufficient force. This situation also applies when removing from the socket.

Furthermore, since the surface of the protrusion 9 forms a curved surface and is continuous with the surface of the lens 6 by the curved surface,
Distortion that poses a problem in use does not occur at the relevant location.

Incidentally, since the protrusion 9 formed on the surface of the lens 6 is used for the above-mentioned purpose,
Two or more must be provided. However, providing too many protrusions will cause a lot of distortion in the lens, and there is no practical need for so many protrusions, so it is better to limit the number to about four at most. Furthermore, if the spacing between the protrusions is narrow, it becomes difficult to apply rotational moment to the light bulb, so it is preferable to arrange the protrusions on a circumference with a diameter of 50 mm or more. Further, if the distance between the protrusions is too far apart, the fingers of the hand will not be able to reach between the protrusions, so it is preferable to arrange the protrusions on a circumference with a diameter of 140 mm or less.
Furthermore, if the protrusion is too small, it will be difficult for your fingers to get on it, and if it is too large, it will cause cracks on the lens, so the protrusion should be carefully adjusted.
It is preferably in the range of 1.5 to 5.0 mm.

[Brief explanation of the drawing]

The drawings show an example of the implementation of the sealed beam light bulb for projection according to the present invention. Fig. 1 is a side view showing the parts other than the base in longitudinal section, Fig. 2 is a front view of the lens, and Fig. 3 is the lens. FIG. 4 is an enlarged sectional view taken along the - line in FIG. 2. Explanation of symbols: 1... Sealed beam light bulb for projection, 2... Reflector, 6... Lens, 7... Bulb, 8... Base, 9... Protrusion.

Claims (1)

[Scope of utility model registration request] In a sealed beam light bulb for floodlighting, a glass lens is welded to the opening edge of a glass reflector, and a screw-in base is attached to the rear of the bulb with a built-in light source structure inside.
Form multiple protrusions arranged on a circumference of 50 to 140 mm, and determine the protrusion height of the protrusions from the lens surface.
1. A sealed beam light bulb for projecting light, characterized in that the projection has a diameter within the range of 1.5 to 5.0 mm, the surface of the projection is a curved surface, and the curved surface is continuous with the lens surface.