JPH0117761Y2 - - Google Patents

Description

[Detailed explanation of the invention] (a) Industrial application field This invention relates to a bicycle light device such as a bicycle headlamp.

(b) Prior Art A bicycle lamp of this type is known as shown in Japanese Utility Model Publication No. 48-36784. This device includes a reflecting mirror 3' and a front lens 2 as shown in FIG.
1 attached to the lens frame 22, and this lens frame 22
and a main body case 5' into which the light bulb holding tube 23 is screwed.
is integrally protruded, and a light bulb 19' is mounted on this holding tube 23.
The light bulb 19' is configured to be directly attached to the main body case 5' by fitting the cap part of the light bulb 19' into the body case 5'. However, this conventional example has a disadvantage in that the fitting position of the light bulb 19' into the light bulb holding tube 23 is not constant, making it difficult to adjust the focus on the reflecting mirror 3'.

(c) Purpose of the invention This invention is a bicycle light device in which the light bulb is directly attached to the main body case, in which the light bulb is mounted in a fixed position relative to the main body case.

(d) Structure of the invention The bicycle light device of the invention includes a main body case made of resin, a translucent front cover attached to the opening of the main case, and a reflector plate attached to the front cover.
A light bulb holder provided on the inner surface of the main body case, a light bulb holder having a light bulb screwing hole attached to the light bulb holder, and a base screwed into the light bulb screwing hole so that the base becomes a light bulb holder. A light bulb that is inserted into the tube, and a light bulb bottom abutting rib that is provided in the light bulb stopper tube and regulates the screwing position of the light bulb, and the bottom of the base of the light bulb is attached to the light bulb. By abutting against the bottom abutting rib, the amount of screwing into the light bulb holder is kept constant.

(E) Embodiment 1 is a bicycle headlamp, in which 2 is a translucent front cover, and 3 is a reflector whose peripheral edge is fitted into the circumferential rib 2a of this front cover 2. A light bulb loose insertion hole 4 is bored in the center of this reflecting mirror 3. Further, 5 is a main body case made of synthetic resin whose front opening is closed by this front lid 2, and 6 is a main body case made of synthetic resin whose front opening is closed by this front lid 2; The inner cylinder surface of this locking tube 6 has ribs 7 for abutting the bottom of the light bulb divided approximately every 120 degrees, and these ribs on the inner cylinder surface A light bulb cap holding rib 8, which is shorter than the rib 7, is provided at a portion from 7 toward the opening 6a.
A notch 9 for inserting a ground plate is formed from the opening 6a of the stopper cylinder 6. Further, reference numeral 10 denotes a receiver support rib having a height lower than that of the stopper tube 6 and provided continuously on the outer cylinder surface of the stopper tube 6;
1... are the receiver fixing bosses provided in series with the supporting ribs 10..., 12, 12, 13, 13 are the low ribs and high ribs for holding the lead wires provided in series with these fixing bosses 11... These ribs and bosses are both formed to protrude from the inner surface of the main body case 5.

Reference numeral 14 designates an earth lead plate whose free end is inserted into the stop tube 6 through the notch 9, and its base end is fixed by caulking at the same time when the vehicle body mounting bracket 15 is caulked to the main body case 5.

16 is a metal plate light bulb holder, and the light bulb screw hole 17
is bored in the center, and an engaging flange piece 16b is provided around the periphery of one side of the cylindrical portion 16a. Furthermore, 18 is a lead wire.

Then, one end 18a of the lead wire 18 from which the insulation coating has been removed is hooked onto the mouth portion 6a of the retaining tube 6, and the lead wire 18 is connected to the receiver fixing boss 11.
With the light bulb holder 16 sandwiched between the lead wire holding high rib 13 and placed on the lead wire holding low rib 12, the light bulb holder 16 is positioned so that its light bulb screw hole 17 faces the opening 6a. Then, the engaging flange piece 16b
is placed on the holder supporting rib 10, and the upper end 11a of the holder fixing boss 11 is heated and thermally caulked to electrically connect the bulb holder 16 to the lead wire 18, and to secure the main body case. At this time, the upper end 11a covers the upper part of the lead wire 18 and prevents the lead wire 18 from coming off between the receiver fixing boss 11 and the lead wire holding high rib 13. be.

19 is a light bulb, and this light bulb 19 has a base 20.
into the light bulb screwing hole 17 of the holder 4 until the peripheral edge of the cap part 20 is held between the cap holding ribs 8 and the bottom part 20a of the cap part 20 comes into contact with the bottom abutting ribs 7. It is fixed to the receiver 4 by screwing, and the tail terminal 20b is electrically connected to the earth lead plate 14 at this time.

According to this configuration, the mounting position of the light bulb 19 with respect to the main body case 5 is the same as that of the light bulb 19.
The bottom part 20a of the cap part 20 is the rib 7 for contacting the bottom of the light bulb.
By being in contact with..., it will always be in a constant position,
It is not affected by the size of the tail end terminal 20b, which tends to vary depending on each individual mass-produced light bulb 19, or by the force exerted when screwing in. Therefore, since the mounting position of the light bulb 19 is always constant with respect to the reflecting mirror 3 attached to the translucent front cover 2, the light bulb 19 should be brought into contact with the bottom of the light bulb in advance so that it is at the focal point of the reflecting mirror 3. By designing the ribs 7 and molding the main body case 5 with resin, the subsequent focus adjustment work can be omitted. In addition, since the bulb 19 has its cap 20 screwed into the bulb holder 16 and is held between the cap holding ribs 8, the heat emitted from the bulb 19 is transferred between the cap 20 and the bulb stopper tube 6 by the cap holding ribs 8. Heat is dissipated by the gap created between the bulbs and is not directly transmitted to the bulb holder tube 6, so the bulb holder tube 6 is not melted by the heat.

(f) Effects of the invention According to the invention, the size of the rib for contacting the bottom of the light bulb is designed taking into account the desired position of the light bulb when manufacturing the main body case, and when assembling or replacing the light bulb, the size of the rib for contacting the light bulb is The light bulb can be placed in the desired position with respect to the reflector by simply screwing it in until its bottom abuts against the light bulb bottom abutment rib, and there is no need to adjust the focus each time.

[Brief explanation of the drawing]

The drawings all relate to a bicycle light device; Fig. 1 is a cross-sectional side view of the embodiment of the present invention, Fig. 2 is an exploded view of the same, and Fig. 3 is an exploded view of the same.
The figure is a sectional view of the main part of the main body case, FIG. 4 is a front view of the main part of the main body case, and FIG. 5 is a sectional view of the main part. Further, FIG. 6 is a sectional view of a conventional example. 2...Translucent front cover, 3...Reflector, 5...Body case, 7...Lib for contacting the light bulb, 6...Light bulb stopper tube, 16...Light bulb holder, 19...Light bulb.

Claims (1)

[Scope of utility model registration request] A main body case made of resin, a translucent front cover attached to the opening of the main body case, a reflector plate attached to the front cover, a light bulb stopper provided on the inner surface of the main body case, and a light bulb. A light bulb holder having a threaded hole and attached to the light bulb holder tube; a light bulb having a cap screwed into the light bulb threading hole and the cap inserted into the bulb holder tube; and a light bulb provided in the bulb holder tube. 1. A bicycle lamp comprising: a light bulb bottom abutment rib for regulating the screwing position of the light bulb.