JP3046266B2 - Downlight - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a so-called downlight mainly mounted in a ceiling.

[0002]

2. Description of the Related Art FIG. 6 is a diagram showing a schematic structure of a conventional downlight generally used. In the figure, a downlight 100 is embedded in a ceiling 5. A reflector 2 is attached to the inside of the frame 1 of the downlight 100. The socket 6 for mounting the light bulb 4 is mounted laterally inward and slightly obliquely downward from the side surface of the frame 1. Such a downlight 10
At 0, for example, not only a 40W or 60W light bulb, but also a 10W
Even a 0W light bulb can be attached. However, when the lamp is limited to a light bulb of 60 W or less from the viewpoint of the heat resistance of the appliance, a cylinder 6a for preventing erroneous use is formed at the tip of the socket 6 as shown in FIG. This is based on the fact that the diameter of the bulb neck portion in the vicinity of the base of the bulb 4 for a downlight is different between those having a diameter greater than 60 W and those having a diameter of 60 W or less. That is, as shown in FIG. 8 (b), the bulb d of 60W or less has a diameter d1 of the bulb neck portion 4a of 18.5 to 19.5mm, whereas as shown in FIG. A bulb with a large wattage has a bulb neck 4a having a diameter d2 of 22.5 to 22.5.
23.5 mm. Therefore, the cylindrical body 6a is made to fit the bulb neck portion 4a of the electric bulb having an inner diameter of 60 W or less. Therefore, if a light bulb having a wattage exceeding 60 W is erroneously mounted, the bulb neck portion 4a of the light bulb will not work.
Is in contact with the cylinder 6a and cannot be inserted any further. Thus, only the right wattage bulb can be installed.

[0003]

However, the socket 6 having the cylinder 6a for preventing misuse (FIG. 7) is longer than the socket 6 without the cylinder 6a (FIG. 6).
As a result, the distance between the distal end portion 6b of the socket 6 and the reflection plate 2 on the axial extension thereof is reduced. As a result, there is a problem that, when trying to mount the light bulb, the tip of the light bulb hits the reflector 2 and it is difficult to mount the light bulb.

[0004] In view of the above-mentioned conventional problems, an object of the present invention is to provide a downlight that can be easily mounted on a light bulb while preventing erroneous use of the light bulb.

[0005]

SUMMARY OF THE INVENTION According to the present invention, in a downlight in which a socket is mounted horizontally in a frame, a protruding portion for preventing erroneous use of a light bulb is provided on an upper side of a distal end side of an electrode portion of the socket. A space for introducing the base portion of the electric bulb is formed at the lower side (claim 1). In the downlight configured as described above, for example, when an attempt is made to mount a bulb exceeding the allowable wattage, the bulb neck portion hits the protruding portion and the mounting is hindered. In addition, due to the presence of the space for introducing the base portion, if the light bulb having an allowable wattage or less is accessed from below, the mounting space is not impaired by the protrusion.

In the downlight, the protruding portion may be a semi-cylindrical body. In this case, misuse of the light bulb is prevented by the half-cylinder, and a sufficient mounting space is secured by accessing the light bulb from the side where the half-cylinder is not provided.

[0007]

FIG. 1 is a diagram showing a configuration of a downlight according to an embodiment of the present invention. In the figure, a downlight 10 is embedded and mounted on a ceiling 5. A reflector 2 is attached to the inside of the frame 1 of the downlight 10. The socket 3 for mounting the light bulb 4 is mounted laterally inward from the side surface of the frame 1 and slightly obliquely downward.

FIG. 3 is a perspective view showing the socket 3. In FIGS. 1 and 3, a projection 3 a for preventing erroneous use of a light bulb is continuously provided in the upper half portion of the socket 3 from the electrode portion 3 b. The protruding portion 3a has a shape like a half cylindrical body obtained by dividing a cylinder into two along the axial direction.
On the other hand, no projection is provided in the lower half of the tip of the socket 3 from the electrode portion 3b, and the lower half is a space for introducing the base 4b of the light bulb 4. Therefore, when the light bulb 4 is mounted, the socket 3
, A sufficient bulb mounting space is secured between the lower end 3c of the socket 3 and the reflector 2 on the extension of the socket 3 in the axial direction. Therefore, the light bulb 4 can be easily attached to the socket 3 without any uncomfortable feeling as compared with the case where the electric bulb 4 is attached to a socket having no misuse prevention function (see FIG. 6). Since the projection 3a is a semi-cylindrical body, it also serves as a guide for guiding the base 4b of the bulb 4 to the electrode 3b of the socket 3 when the bulb is mounted. On the other hand, if a light bulb exceeding the allowable wattage is erroneously mounted, as shown in FIG. 2, the bulb neck 4a of the light bulb 4 comes into contact with the protruding portion 3a, thereby preventing insertion. Therefore, mounting is not possible.

In the above embodiment, the projection 3a is
Although it is assumed that the cylinder is a half-cylindrical body in which the cylinder is halved along the axial direction, a cylinder smaller than half (for example,
/ 3 cylinder shape). Further, the shape is not limited to a shape continuous in the circumferential direction, and may be provided as a plurality of small protrusions 3d as shown in FIG. However, in order to reliably prevent erroneous use, it is preferable to provide the protruding portion 3a as wide as possible as long as the mounting of the bulb 4 is not hindered. Therefore, it is also possible to provide a projecting portion that is formed so as to slightly extend around the lower half as well as the upper half. FIG. 5 is a view showing a socket 3 of still another shape.
(A) is a side view, (b) is a bottom view. In this case, the lower half of the front end side of the socket 3 is notched obliquely with respect to the axis of the socket 3, and the upper half is a protruding portion 3 a protruding relatively to the lower half. I have. With such a structure, the same effect as in the above embodiment (FIGS. 1 to 3) can be obtained.

[0010]

The present invention configured as described above has the following effects. According to the downlight of the first aspect, for example, when an attempt is made to mount a bulb exceeding the allowable wattage, the bulb neck hits the protruding portion and the mounting is hindered, so that erroneous use is reliably prevented. In addition, due to the presence of the space for introducing the base portion, if the light bulb having an allowable wattage or less is accessed from below, the mounting space is not impaired by the protrusion. Therefore, mounting of the light bulb is easy.

According to the downlight of the second aspect, misuse of the light bulb is more reliably prevented by the half-cylinder body, and the bulb is accessed from the side where the half-cylinder body is not provided, so that the bulb is sufficiently mounted. Space is secured and the bulb can be easily mounted.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a schematic configuration of a downlight according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view illustrating a state in which a light bulb exceeding an allowable wattage is erroneously mounted in the downlight.

FIG. 3 is a perspective view of the socket shown in FIG. 1;

FIG. 4 is a perspective view showing a socket having another shape.

FIG. 5 is a view showing a socket having still another shape;
(A) is a side view, (b) is a bottom view.

FIG. 6 is a cross-sectional view showing a schematic configuration of a conventional downlight.

FIG. 7 is a cross-sectional view illustrating a schematic configuration of a conventional downlight provided with a socket having an erroneous use prevention function.

FIG. 8 is a diagram showing a downlight bulb for each wattage.

[Explanation of symbols]

 1 Frame 2 Reflector 3 Socket 3a Projection 3d Small Projection 3b Electrode 4 Light Bulb 4a Bulb Neck 5 Ceiling 10 Downlight

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) H01R 33/22 F21V 19/00 310 F21V 21/04

Claims (2)

(57) [Claims] 1. A downlight in which a socket is mounted horizontally in a frame, wherein a projection for preventing misuse of a light bulb is continuously provided on an upper side of a distal end side of an electrode portion of the socket, and a base of the light bulb is provided on a lower side. A downlight, wherein a space for introducing a part is formed. 2. The downlight according to claim 1, wherein said projecting portion is a semi-cylindrical body.