JPH0345432Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field] This invention relates to a light bulb adapter used when attaching a halogen light bulb with a small diameter base to a socket for a beam light bulb with a large diameter.

[Background technology]

Conventionally, beam light bulbs have been used as floodlight bulbs. However, recently, the use of halogen light bulbs has been increasing as they are small, inexpensive, have a clear light distribution pattern, and can be easily designed for light distribution. in this way,
When replacing a beam light bulb with a small halogen light bulb, it would be expensive to replace the entire lighting fixture, so an adapter was devised that allows you to attach a small halogen light bulb to a beam light bulb lighting fixture. There is. For example, Utsukai Showa 62-
There is an adapter as shown in FIGS. 6 to 8 disclosed in Japanese Patent No. 5579. Note that this adapter is used when attaching a halogen light bulb to an incandescent light bulb socket.

In FIG. 6, the adapter has a reflective cap 7 at the tip.
0, a middle body 71, and an incandescent lamp cap 72 at the rear end. The reflective shade 70 is formed of a dichroic mirror with an optical multilayer reflective coating applied to the inner surface of a glass material. Further, as shown in FIG. 7, the middle body 71 is formed by molding ceramics into two halves, and has an inner cylinder body 75 having a small-diameter socket 74 in the center of which a halogen light bulb 73 is attached.
and an outer cylindrical body 76 extending toward the tip so as to surround the inner cylindrical body 75. The tip of 76 serves as a mounting portion 78 for the reflective shade 70.

Further, two jetties 83 and 84 are provided on the outer wall of the upper end of the outer cylinder 76, and the inner cylinder 75
includes an electrode fitting 79 disposed in the socket 74,
Pinch grooves 81 and 82 are formed to sandwich and hold the tongue portions 80 (see FIG. 8).

In the adapter having such a configuration, the tongue portion of the electrode fitting 79 is inserted into the groove 81, and the electrode fitting 8 is inserted into the groove 81.
The tongue part of the ring 85 is placed between the pair of protrusions 83 and 84, and the middle body 71 is integrated in a temporarily fixed state.

Next, the incandescent light bulb cap 72 is placed on the attachment part 77 at the rear end of the middle body 71 and cemented, and the neck of the reflector 70 is inserted into the attachment part 78 at the tip and cemented.

With the halogen bulb 73 screwed and attached to the socket 74, the incandescent bulb cap 72 can be attached to an existing incandescent bulb lighting fixture for use.

However, according to the adapter configured in this manner, the middle body 71 is asymmetrical due to the shape of the sandwiching grooves 81 and 82 that sandwich the electrode fittings 79 and 80. For this reason, the middle body 7 of the two-split shape
When molding 1, a dedicated mold was required for each, which caused the problem of increased manufacturing costs.

[Purpose of invention]

The purpose of this invention is to provide a light bulb adapter that is inexpensive to manufacture.

[Disclosure of invention]

The light bulb adapter of this invention consists of a pair of adapter body structural members each having a pair of conductive fitting fitting grooves at symmetrical positions with respect to the central axis, which are formed by dividing the adapter body into two vertically, and the adapter body structure. a receiver held between the tips of the members, a reflective shade provided at the tip of the adapter body and having a light bulb insertion hole at a position facing the receiver, and a shell provided at the base end of the adapter body; A first conductive metal fitting that fits into the one conductive metal fitting groove and has one end disposed in the receiving part and the other end connected to the shell, and a first conductive metal fitting that fits into the other conductive metal fitting groove. a second conductive metal fitting having one end disposed in the receiving part and the other end proximal to the central axis of the adapter body and having a screw hole formed therein; and a second conductive metal fitting disposed on the outer surface of the shell to fix a conductive body. The cap is fastened to the screw hole of the second conductive metal fitting with a screw eyelet and fixed to the adapter body.

According to the configuration of this invention, a light bulb is attached to the receiver of the adapter body through the light bulb insertion hole of the reflective shade, and the base of the light bulb is connected to the first and second conductive fittings, and then connected to the shell and eyelet of the adapter body. . Then, use the adapter body by attaching it to an existing lighting fixture.

Since the pair of conductive metal fitting grooves are formed at symmetrical positions on the adapter body component, the pair of adapter body components can be molded using the same mold, reducing manufacturing costs.

Embodiment An embodiment of this invention will be described based on FIGS. 1 to 5. That is, as shown in FIG. 1, the light bulb adapter of this embodiment has an adapter body 10 divided vertically into two parts, each having a pair of conductive fitting fitting grooves 22 and 23 at symmetrical positions with respect to the central axis.
A pair of adapter body constituent members 10a, 1 having
0b, this adapter main body constituent member 10a, 10
a receiver 11 held between the ends of the adapter body 10; a reflector 14 provided with a light bulb insertion hole 13 at the end of the adapter body 10 and facing the receiver 11;
A shell 1 disposed at the base end of the adapter body 10
6, and a first conductive metal fitting 29 that fits into the one conductive metal fitting fitting groove 22 and has one end disposed in the receiver 11 portion and the other end connected to the shell 16.
and fits into the other conductive fitting fitting groove 23, one end is placed in the receiving part 11, and the other end is placed on the base end side of the central axis of the adapter main body 10, and a screw hole 34 is formed. The second conductive metal fitting 30 is connected to the second conductive metal fitting 30 by the eyelet 41 which is arranged on the outer surface of the shell 16 and consists of a conductive fixing screw.
The cap 40 is fastened to the screw hole 34 of the adapter body and fixed to the adapter body.

The reflective shade 14 is composed of a dichroic mirror with a multilayer optical function reflective surface 18 on the inner surface of a glass material 17, and transmits about 80% of unnecessary heat rays (infrared rays) from the light bulb backward. In addition, a light bulb insertion hole 13 is provided in the neck 14' of the reflective shade 14.
Further, a recess 19 is formed on the outer periphery of the neck portion 14'.

The adapter body 10 is formed by molding and sintering a ceramic material into a pair of adapter body constituent members 10a and 10b of the same shape, which are divided into two in the longitudinal direction, as shown in FIG.
The adapter main body components 10a and 10b have a concave portion 28 formed on the outer periphery of the tip, and a small-diameter shell attachment portion 12 at the base. Further, a light bulb insertion hole 20 is open on the tip side, and a receiver mounting groove 21 is formed on the inner peripheral surface of this light bulb insertion hole 20. Furthermore, a pair of conductive fitting fitting grooves 22 and 23 are arranged in parallel, extending from the light bulb insertion hole 20 to the base ends of the adapter body constituent members 10a and 10b, at symmetrical positions with respect to the central axis. Enlarged diameter portions 22a, 23a are formed in the middle of the conductive fitting fitting grooves 22, 23, and small diameter plunger insertion holes 22b, 23b are formed at the upper ends.

Reference numeral 15 denotes a connecting ring, which is made of stainless steel and has a cylindrical shape, and has a collar 26 protruding from the inner peripheral surface of one open end.

Next, the assembly of the light bulb adapter will be explained. First, both adapter main body constituent members 10a, 10
When aligning b, the adapter body component 10
The receiver 11 and the first and second conductive fittings 29, 30 shown in FIG. 3 are fitted into the receiving fitting grooves 21 and the conductive fitting fitting grooves 22, 23 of a and 10b. Receiver 11 and first and second conductive metal fittings 29, 3
0 are both made of brass. The receiver 11 has a pair of hook grooves 45, and a collar 31 having a pair of protrusions 32 is protruded from the outer periphery. A deep groove (not shown) is formed in the receiver mounting groove 21 of the adapter main body components 10a, 10b, and the protrusion 32 in this deep groove is inserted into the collar 3.
1 into the receiver mounting groove 21. In this way, the receiver 11 is positioned at a predetermined position.
Further, the first conductive metal fitting 29 is L-shaped, and a pair of guide pieces 33 are erected at the upper end. Further, the second conductive metal fitting 30 is formed in a U-shape, has a pair of guide pieces 34 erected at its upper end, and has a screw hole 35 at its lower end. Plungers 48 and 4 are connected via compression coil springs 46 and 47 between the guide pieces 33 and 34 of the first and second conductive metal fittings 29 and 30, respectively.
Insert 9 so that it can move up and down. The first and second conductive metal fittings 29, 30 are fitted into the conductive metal fitting grooves 22, 23 by fitting the guide pieces 33, 34 into the enlarged diameter portions 22a, 23a of the conductive metal fitting grooves 22, 23. match. The plungers 48, 49 are compressed by coil springs 46, 4.
Due to the pressing force of 7, the plunger insertion hole 22b,
It protrudes from 23b.

And adapter main body constituent members 10a, 10b
are fitted together, the connecting ring 15 is fitted onto the tip thereof, and the fixing ring 27 is engaged with the concave portion 28 of the adapter body 10 to fix the connecting ring 15 to the adapter body 10. Furthermore, a brass shell 16 is attached to the shell attachment portion 12 at the proximal end of the adapter body 10.
to be fitted externally. As shown in FIG. 4, the end of the first conductive metal fitting 29 penetrates the hole 37 of the shell 16 and is fixed with high temperature solder 38. Furthermore, the first
As shown in the figure, an insulating cap 40 is placed at the lower end of the shell 16, and a conductive eyelet 41 is fastened to the screw hole 35 of the second conductive fitting 30 to fix the shell 16. That is, as shown in FIG. 5, by inserting the second conductive metal fitting 30 into the gap L between the adapter body 10 and the cap 40 and fastening the eyelet 41 to the screw hole 35 of the second conductive metal fitting 30. , the second conductive metal fitting 30 with point A as the fulcrum
The elasticity of the eyelet 41 can prevent the eyelet 41 from loosening. Furthermore, the neck 14' of the reflective shade 14
into the connecting ring 15, and connecting ring 1
5 is caulked and engaged in the recess 19 of the reflective shade 14, thereby fixing the reflective shade 14.

Insert the halogen light bulb 39 from the light bulb insertion hole 13 of the reflective shade 14 into the light bulb insertion hole 20 of the adapter body 10, and insert the boss 51 protruding from the side surface of the base 50 of the halogen light bulb 39 into the hooking groove 45 of the receiver 11. The pair of terminals of the cap 50 are electrically connected to the plungers 48 and 49, respectively. That is, one terminal of the cap 50 of the halogen light bulb 39 is connected to the shell 16 via the plunger 48 and the first conductive metal fitting 29, and the other terminal is connected to the eyelet 41 via the plunger 49 and the second conductive metal fitting 30. do. Then, the adapter main body 10 is used by being attached to an existing beam light bulb lighting fixture.

According to the light bulb adapter configured in this way, the first and second conductive fittings 2 are asymmetrical to each other.
9 and 30, a pair of conductive fitting fitting grooves 22 and 23 can be formed at symmetrical positions of the adapter main body constituent members 10a and 10b, and the pair of adapter main body constituent members 10a and 10b can be connected to the same Can be molded using a mold, reducing manufacturing costs.

Further, as shown in FIG. 4, the first conductive metal fitting 20
Since the tip of the shell 16 is soldered to the shell 16, rotation of the shell 16 can be prevented.

Further, as shown in FIG. 5, the second conductive metal fitting 3
At 0, the eyelet 41 can be prevented from loosening, and a spring washer for preventing the eyelet 41 from loosening is not required.

Further, the structure is simple, and the adapter main body constituent members 10a and 10b can be brought together and the connecting ring 15 fitted on the outside.
0a and 10b can be easily assembled.

In the above embodiment, the receiver 11 is of the bayonet type, but may be of the screw type.

[Effect of idea]

According to the light bulb adapter of this invention, the light bulb is attached to the receiver of the adapter body through the light bulb insertion hole of the reflective shade, and the base of the light bulb is connected to the first and second conductive metal fittings, and the bulb is inserted into the shell and eyelet of the adapter body. Connecting. Then, use the adapter body by attaching it to an existing lighting fixture.

Since a pair of conductive metal fitting grooves are formed at symmetrical positions on the adapter body components, the pair of adapter body components can be molded using the same mold, which has the effect of reducing manufacturing costs. can get.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of an embodiment of this invention, Fig. 2 is a partially exploded perspective view thereof, Fig. 3 is an exploded perspective view of the receiver and the first and second conductive fittings, and Fig. 4 is the shell thereof. and a perspective view showing the connection state of the first conductive metal fitting,
FIG. 5 is a partial sectional view thereof, FIG. 6 is a side view of the conventional example, FIG. 7 is an exploded perspective view of the middle body thereof, and FIG. 8 is a perspective view of the electrode fitting. 10...Adapter body, 10a, 10b...
Adapter body component, 11... Receiver, 13...
Light bulb insertion hole, 14... Reflective shade, 16... Ciel,
22, 23... Conductive fitting fitting groove, 29... First conducting fitting, 30... Second conducting fitting, 34... Screw hole, 40... Cap, 41... Eyelet.

Claims (1)

[Scope of utility model registration request] The adapter body is divided vertically into two parts, each having a pair of conductive metal fitting grooves at symmetrical positions with respect to the central axis, and a receiver sandwiched between the tips of the adapter body components. gold, a reflective shade provided at the tip of the adapter body and having a light bulb insertion hole at a position facing the receiver, a shell provided at the base end of the adapter body, and a groove for fitting the one conductive metal fitting. a first conductive metal fitting having one end disposed in the receiving part and the other end connected to the shell; and a first conductive metal fitting fitting in the other conductive fitting fitting groove and having one end disposed in the receiving part. At the same time, the second conductive metal fitting is arranged at the other end on the proximal side of the central axis of the adapter body and has a screw hole formed therein, and the second conductive metal fitting is arranged on the outer surface of the shell and includes a fixing screw for the conductor. 2. A light bulb adapter comprising a cap fastened to a screw hole of a conductive metal fitting and fixed to the adapter body.