JPH0345434Y2 - - 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 Publication 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 80 is inserted into the groove 81.
The ring 85 is placed between the pair of jetties 83 and 84, and the middle body 71 is temporarily fixed to be integrated.

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, with the adapter configured in this manner, when the halogen bulb 73 was attached to the electrode fitting 79, poor contact between the eyelet of the halogen bulb 73 and the electrode fitting 80 sometimes occurred.

[Purpose of invention]

The purpose of this invention is to provide a light bulb adapter that can prevent poor contact with the light bulb and is easy to assemble.

[Disclosure of invention]

The light bulb adapter of this invention consists of a pair of adapter body constituent members each having a pair of conductive fitting fitting grooves formed by dividing the adapter body into two vertically and each having a storage portion formed on the distal end side, and this adapter body constituent member. a receiver held between the tips of the adapter body, 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 base provided at the base end of the adapter body; A pair of guide pieces are fitted into a pair of conductive fitting fitting grooves, each having a pair of guide pieces facing each other and fitting into the storage part in a parallel attitude to the dividing plane of the adapter main body component at one end, and the other end is connected to the base. A plunger is housed between the pair of guide pieces and is biased to protrude in the direction of the receiver by a compression coil spring.

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 a pair of conductive metal fittings via a plunger to be connected to the base of the adapter body. Then, use the adapter body by attaching it to an existing lighting fixture.

Since the plunger is biased to protrude in the direction of the receiver by a compression coil spring, contact between the plunger and the bulb can be ensured, and poor contact between the bulb can be prevented.

In addition, since the compression coil spring is stored between a pair of guide pieces and fitted into the storage part of the conductive metal fitting groove, the compression coil spring is surrounded on all four sides by the guide pieces and the storage part, so that the compression coil spring can be easily removed during assembly. It does not pop out and is easy to assemble.

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 consists of a pair of adapter bodies 10 that are vertically divided into two parts, each with storage portions 22a and 23a (see FIG. 2) formed on the distal end side. A pair of adapter body constituent members 10a, 10b having conductive fitting fitting grooves 22, 23, a receiver 11 held between the tips of the adapter body constituent members 10a, 10b, and a receiver 11 provided at the tip of the adapter body 10. A light bulb insertion hole 1 is provided at a position facing the receiver 11.
3 and the adapter body 10.
The cap 9 disposed at the base end of the accommodating portion 22a is fitted into the pair of conductive fitting fitting grooves 22 and 23, and the storage portion 22a is held at one end thereof in a parallel attitude to the dividing plane of the adapter main body constituent members 10a and 10b. , 23a, a pair of conductive metal fittings 2 having a pair of guide pieces 33, 34 facing each other and having the other end connected to the base 9.
9, 30, and plungers 48, 49 which are housed between the pair of guide pieces and are biased to protrude in the direction of the receiver 11 by compression coil springs 46, 47.

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. In the middle of the conductive metal fitting grooves 22 and 23, there is a storage part 22a with an enlarged diameter.
23a is formed, and the upper end serves as small-diameter plunger insertion holes 22b and 23b.

Further, the connecting ring 15 is made of stainless steel and has a cylindrical shape, and has a flange 26 protruding from the inner circumferential surface of one open end. In addition, the base 9 is
An eyelet 41 consisting of a brass shell 16, an insulator cap 40, and a conductor fixing screw.
It is composed of

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 constituent members 10a, 10b, and a protrusion 32 is inserted into this deep groove.
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 has a pair of guide pieces 33 erected at its 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 and 30 are fitted into the conductive metal fitting grooves 22 and 23 by fitting the guide pieces 33 and 34 into the storage portions 22a and 23a of the conductive metal fitting grooves 22 and 23. do. 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, thereby fixing the connecting ring 15 to the adapter body 10. Further, the shell 16 is fitted onto the shell attachment portion 12 at the base end of the adapter body 10 . In addition, as shown in FIG. 4, the first conductive metal fitting 2
The end of 9 passes through the hole 37 of the shell 16 and is fixed with high temperature solder 38. Furthermore, as shown in FIG. 5, a cap 40 is placed on the lower surface of the shell 16, and the eyelet 41 is fastened to the screw hole 35 of the second conductive metal fitting 30, thereby fixing the shell 16. moreover,
As shown in FIG. 1, insert the neck 14' of the reflective shade 14 into the connecting ring 15, and
is crimped and engaged in the recess 19 of the reflective shade 14, thereby fixing the reflective shade 14.

Insert the halogen light bulb 30 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 plungers 48 and 49 are connected to the compression coil spring 4.
Since the plungers 48 and 49 and the halogen bulb 39 are biased to protrude in the direction of the receiver 11 at
Ensures contact with the base of the halogen bulb 39
Poor contact can be prevented.

Moreover, the compression coil springs 46 and 47 are housed between the pair of guide pieces 33 and 34, and the conductive metal fitting fitting groove 2
2 and 23, the compression coil springs 46 and 47 are surrounded on all four sides by the guide pieces 33 and 34 and the storage sections 22a and 23a, so that the compression coil springs 46 and 47 do not pop out during assembly. Easy to assemble without any hassle.

In addition, adapter main body constituent members 10a, 10b
is made of ceramics and has variations in molding, but since the first and second conductive fittings 29 and 30 are made of brass, the pair of guide pieces 33 and 34
The dimensional accuracy between them is good, the plungers 48 and 49 can be reliably guided, and the plungers 48 and 49 can move smoothly.

Furthermore, since the plungers 48, 49 and the compression coil springs 46, 47 are guided by the guide pieces 33, 34, the ceramic adapter body 10 is not rubbed by the plungers 48, 49 and the compression coil springs 46, 47. This can prevent wear and tear.

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 a pair of conductive metal fittings via the plunger, and then connected to the base of the adapter body. do. Then, use the adapter body by attaching it to an existing lighting fixture.

Since the plunger is biased to project in the direction of the receiver by a compression coil spring, contact between the plunger and the light bulb can be ensured, and poor contact between the light bulb can be prevented.

In addition, since the compression coil spring is stored between a pair of guide pieces and fitted into the storage part of the conductive metal fitting groove, the compression coil spring is surrounded on all four sides by the guide pieces and the storage part, so that the compression coil spring can be easily removed during assembly. The effect is that the assembly can be easily performed without the parts popping out.

[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. 9...Base, 10...Adapter body, 10a,
10b... Adapter main body component, 11... Receiver, 13... Light bulb insertion hole, 14... Reflective shade, 2
2, 23... Conductive metal fitting fitting groove, 22a, 23a...
...Storage part, 29, 30...Conductive metal fittings, 33, 34
... Guide piece, 46, 47 ... Compression coil spring,
48, 49...Plungeya.

Claims (1)

[Scope of utility model registration request] A pair of adapter body components each having a pair of conductive fitting fitting grooves formed by vertically dividing the adapter body into two and each having a housing section formed on the tip side, and a receiver sandwiched between the tips of the adapter body component 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; a base provided at the base end of the adapter body; and a pair of conductive fitting fitting grooves. a pair of electrically conductive metal fittings that are fitted together and each have a pair of guide pieces that are fitted into the storage part in parallel to the dividing plane of the adapter main body component at one end and face each other, and the other end of which is connected to the base; ,
A light bulb adapter comprising: a plunger housed between the pair of guide pieces and biased to protrude in the direction of the receiver by a compression coil spring.