JPS6339843Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to a lighting fixture that can be attached to the ceiling, wall, etc. of a room.

This kind of lighting equipment is known, for example, as shown in Japanese Patent Publication No. 55-38762 and Japanese Utility Model Publication No. 55-4887.

As shown in FIG. 5, all of these devices basically have a cylindrical body 26 with a light bulb 17 attached to the bottom surface 23 via the light bulb socket 15 and a recess 25 with a female thread 24 on the peripheral wall. The globe 18 is attached to a mounting surface such as a ceiling surface, and is integrated by screwing a male screw 19 provided on the outer periphery of the opening 20 of the globe 18 into the female screw 24. However, according to such a conventional example, the peripheral wall having the female thread 24 is integrally formed as a part of the cylindrical body 26, which makes the shape of the cylindrical body 26 complicated and difficult to manufacture. This method is difficult and requires a special manufacturing method, as shown in Japanese Patent Publication No. 55-38762, for example, and has the drawback of increasing costs. Furthermore, since the shape of the cylindrical body 26 is complicated, it is difficult to increase the machining accuracy of the female thread 24 portion, and since the globe 18 is a molded product of glass or synthetic resin, it is difficult to increase the machining accuracy of the male screw 19 portion. Difficult to remove these screws 19, 24
If the axes of the cylindrical body 26 and the glove 18 do not match, the contact portions of the cylindrical body 26 and the globe 18 will not be in uniform contact, and furthermore, the waterproof ring packing 22 will not be able to be tightened uniformly around the entire circumference, resulting in the waterproofing. There is a risk that it will not be as effective. Further, if the glove 18 is screwed into the cylindrical body 26 excessively, an excessive force will be applied to the abutting portion, and there is a risk that the glove 18 will be damaged.

(c) Purpose of the invention This invention was created to eliminate these drawbacks. It simplifies the structure of the component parts to make them easier to manufacture, improves the machining accuracy of each component, and also improves the installation of the glove. The purpose is to simplify work, prevent glove damage, and improve the reliability and durability of lighting equipment.

(d) Structure of the invention The lighting device of the invention includes a cylindrical body with an open end, a globe with a threaded part formed around the opening,
a glove stopper tube which is open at both ends and has a peripheral wall having a plurality of support holes and a screw receiving part into which the threaded part is screwed; a central board; and an opening surface of the glove stopper cylinder which integrally extends radially from the central board. It is composed of a plurality of plate-shaped support pieces having plate surfaces facing each other, and the support pieces are inserted into the support holes to support the glove stopper tube in a reciprocating manner within the cylindrical body, and a leaf spring biased toward the bottom of the other end; and a light bulb socket fixed to the cylindrical body together with the leaf spring in such a manner that the center substrate of the leaf spring is held between the bottom of the other end of the cylindrical body. The cylindrical body and the glove stopper tube are constructed as separate parts, and then they are elastically integrated by a leaf spring, and the glove to be screwed onto the glove stopper tube is attached to the cylindrical body. It is supported by urging toward the other end.

(E) Embodiment 1 is a waterproof packing, 2 is a cylindrical body that is attached to a surface to be attached such as a ceiling or wall of a room through this waterproof packing 1, and this cylindrical body 2 is screwed to the surface to be attached. Upper mounting surface 3 that is directly fixed with etc.
It consists of a metal bottom plate 3 having a diameter of 1.5 mm, and a metal cylindrical body 6 having a lower opening 5, the upper end of which is caulked to the periphery of the bottom plate 3, and a brim-shaped peripheral edge 4 bent at the lower end.

Reference numeral 7 denotes a metal glove stopper tube that is housed within the cylindrical body 2 and is supported by a leaf spring to be described later so as to be able to reciprocate in the vertical direction, and has upper openings 8 at both ends thereof.
a and a lower opening 8b, and a female threaded portion 10 is formed by press working on the peripheral wall 9 as a screw receiving portion to be screwed into a male threaded portion of a glove to be described later.

Reference numeral 11 denotes a leaf spring that is attached to the glove stopper tube 7 and supports the glove stopper tube 7 to the cylindrical body 2;
Four supporting pieces 1 are arranged in four radial directions from the central board 12.
3... stands out as a whole. These supporting pieces 1
3... are respectively inserted into support holes 14... bored in the peripheral wall 9 near the upper opening 8a of the glove stopper tube 7 with their plate surfaces facing the upper opening 8a of the glove stopper tube 7. .

Reference numeral 15 denotes a light bulb socket, which holds the central base plate 12 of the leaf spring 11 between the bottom plate 3 of the cylindrical body 2 and is fixed together with the leaf spring 11 to the center of the bottom plate 3 by a screw 16. The leaf spring 11 is thus fixed to the cylindrical main body 2, supports the glove stopper tube 7 in a reciprocating manner, and biases the glove stopper tube 7 in the direction of the upper mounting surface 3a. In addition, since the leaf spring 11 attached to the glove stopper tube 7 and the light bulb socket 15 are fixed at the same time with the common screw 16, assembly work efficiency is improved and the leaf spring 1
1 is firmly fixed to the cylindrical body 2.

17 is a light bulb attached to the light bulb socket 15;
Reference numeral 18 denotes a glove made of glass or synthetic resin that covers the light bulb 17, and this glove 18 has a male screw portion 19 screwed into the female screw portion 10 formed on the periphery of the opening 20, and an engaging shoulder portion 21. have.
22 is a waterproof ring packing, which is inserted between the engagement shoulder 21 of the glove 18 and the brim-shaped peripheral edge 4 of the cylindrical body 2 to prevent moisture from entering the lighting equipment. .

Thus, the glove 18 has its male threaded portion 19.
is attached to the cylindrical body 2 by screwing into the female threaded portion 10 of the glove stopper tube 7 which is elastically held within the cylindrical body 2 by a leaf spring 11. At this time, even if the glove 18 is screwed in somewhat excessively, the glove stopper tube 7 simply moves downward against the biasing force of the leaf spring 11, so that no unreasonable force is applied to the glove 18, and the glove 18 is damaged. Never. Further, since the engagement shoulder 21 of the glove 18 and the brim-shaped peripheral edge 4 of the cylindrical body 2 abut with uniform pressure at all locations, the ring packing 22 is prevented.
can be tightened together around the entire circumference and has a complete waterproof effect.

Furthermore, when the glove 18 is screwed into the glove stopper tube 7, the glove 18 is attached to the glove stopper tube 7.
Torsional force is applied in the screwing direction. However, in this case, since the support piece 13 is inserted into the support hole 14 with its plate surface facing the upper opening 8a of the glove stopper tube 7, the torsional force is applied to the support piece through the glove stopper tube 7. 13 in the width direction, and the leaf spring 11 is applied to the bottom plate 3 of the cylindrical body 2.
and the light bulb socket 15, and are firmly fixed. Therefore, the leaf spring 11 is not deformed by this torsional force, and the glove 1
8 is reliably held and has excellent durability.

(f) Effects of the invention According to the invention, since the cylindrical body and the glove stopper are constructed as separate parts, they can be manufactured separately, and the processing accuracy of each can be improved. In particular, the work of installing a threaded portion around the peripheral wall of the glove stopper tube can be made extremely easy. In addition, even if you tighten the glove excessively when attaching the glove, the tightening force is absorbed by the leaf spring, so there is no risk of applying excessive force to the glove and damaging it. Since this is done using a special leaf spring that does not deform when the glove is screwed on, the glove is held securely and is highly reliable and durable.

[Brief explanation of the drawing]

FIG. 1 is an external perspective view showing an embodiment of the present invention;
Fig. 2 is a cross-sectional view of the main part, Fig. 3 is a cross-sectional view of the main part with the glove removed, Fig. 4 is an exploded perspective view of the main part, and Fig. 5 is a cross-sectional view of the main part showing the conventional example. be. 2... Cylindrical body, 7... Glove stopper tube, 10
... Female screw part, 11 ... Leaf spring, 12 ... Center board, 13 ... Support piece, 14 ... Support hole, 15 ...
Light bulb socket, 18...Glove, 19...Male thread part.

Claims (1)

[Scope of utility model registration request] a cylindrical body with one end open; a glove with a threaded part formed around the opening; and a glove stopper cylinder with both ends open and with a peripheral wall having a plurality of support holes and a screw receiving part into which the threaded part is screwed. , consisting of a central substrate and a plurality of plate-shaped support pieces that integrally extend radially from the central substrate and have plate surfaces facing the opening surface of the glove stopper tube, and the support pieces are inserted into the support holes to remove the glove. a leaf spring for reciprocatingly supporting the retaining tube within the cylindrical body and biasing it toward the bottom of the other end of the cylindrical body; 1. A lighting device comprising: a light bulb socket fixed to the cylindrical body together with the leaf spring in a state where the socket is held between the bulb sockets.