GB2321345A

GB2321345A - Lamp bulb with flat insertion base

Info

Publication number: GB2321345A
Application number: GB9700957A
Authority: GB
Inventors: Peter K H Huang
Original assignee: Shining Blick Enterprises Co Ltd
Current assignee: Shining Blick Enterprises Co Ltd
Priority date: 1997-01-17
Filing date: 1997-01-17
Publication date: 1998-07-22
Anticipated expiration: 2017-01-17
Also published as: JPH1139924A; GB9700957D0; FR2758913A1; CA2207139A1; GB2321345B

Abstract

An improved miniature lamp structure, wherein, two conductors (51, 52; 72, 73; 81, 82) are positioned by a burned bead (53) in the lamp bulb (50, 70, 80), a tungsten filament (54) is provided on the top of the conductors (51, 52; 72, 73; 81, 82) of which the ends (55, 56) extend outwardly of a flat insertion connecting end (57, 71, 83) of the lamp bulb (50, 70, 80); it is characterized in that, the outwardly extending ends (55, 56) of the conductors (51, 52; 72, 73; 81, 82) are bended to be positioned on the two lateral sides (58, 59) of the flat insertion connecting end (57, 71, 83), so that they can be connected directly with two power line metal sheets (62, 63; 77, 78; 88, 89) provided in a connecting base (60, 76, 84). Metal contact sheets or caps required by ordinary miniature lamps can be saved in the present invention.

Description

COMPLETE SPECIFICATION IMPROVED STRUCTURE FOR MINIATURE LAMP The present invention is related to an improved connecting structure for a miniature lamp, and especially to which wherein the internal conductors are directly bended and close to the two lateral surfaces of an insertion con -necting end of a lamp bulb, so that a telescopically slipping over connecting member or related metal sheet conductors can be saved.

Ordinary miniature lamp bulbs mostly are made of glass, two conductors are provided in the vacuum interior of each lamp bulb, a short tungsten filament is provided between the upper ends of the conductors, the conductors are extended with the other ends thereof through a glass spherical body and then are connected to the electric supply.

Such lamp structures available nowadays include the types stated below: The first one is shown in Fig. 1, wherein, a conventional ball shaped lamp bulb 10 is provided with a flat insertion connecting end 11, two separately located conductors 12, 13 are positioned by a burned bead 14, a tung -sten filament 15 of predetermined length and for emitting light is provided on the top of the conductors 12, 13. The lower ends of the conductors 12, 13 are bended to render the bending sections 16, 17 thereof to be close to the front and the rear surfaces of the flat insertion con -necting end 11 respectively. Such a lamp 10 generally must be assembled onto a connecting base 20 which ordinarily is provided with an internal hole 21 for telescopically connecting with the flat insertion connecting end 11, two metal sheets 22, 23 on a power line are provided on both sides respectively of the internal hole 21, four front and rear metal contact sheets 24, 25 are provided for connecting with the bending sections 16, 17 of the conductors 12, 13. So that when the lamp 10 is assembled onto the connecting base 20, the bending sections 16, 17 of the conductors 12, 13 are connected to the four internal metal contact sheets 24, 25 respectively, then the metal contact sheets 24, 25 are connected to the elec -tric wires, the lamp can thus be turned on to emit light While defect of such lamp is that it must use more metal contac-t sheets 24, 25.

The second one is shown in Fig. 2, wherein, the conventional structure of a Christmas lamp is shown, the ends 33, 34 of two conductors 31, 32 from a Christmas lamp bulb 30 thereof are extended in straight lines out of the glass body and are extended through two corresponding holes provided on the bottom of a plastic cap 35, then are bended to be close to the two lateral sides of the plastic cap 35 at the lower end thereof. The plastic cap 35 with the lamp bulb 30 assembled thereon then i-S connected to a connecting sleeve 36, the ends 33, 34 exposed can contact the internal metal contact sheets 37, 38 provided in the connecting sleeve 36. While defect of such lamp is that it must use an extra plastic cap 35.

The third one is shown in Fig. 3, wherein, an elongated lamp bulb 40 on a screw type lamp is shown, the lower ends of two conductors 41, 42 from the lamp bulb 40 are extended outwardly to be welded to an external screw cap 43, and then are screw coupled in an inner plastic screw hole of a connecting base 45, and contact the internal metal contact sheets 47, 48 provided in the plastic screw hole. Such lamp also must use a metallic external screw cap 43.

The object of the present invention is to provide an improved connecting structure for a miniature lamp, where -in, the lower ends of two conductors from the lamp bulb are extended outwardly to be positioned on the two lateral sides of a flat insertion connecting end thereof, so that the lamp bulb can be assembled in the connecting base directly without providing extra metal contact sheets or cap, production cost of such non-expensive miniature lamps can be largely and effectively reduced.

The present invention will be apparent in its novelty and other characteristics after reading the detailed description of the preferred embodiments thereof in referen ce to the accompanying drawings.

In the drawings: Fig. 1 is an analytic perspective view of a conventional ball shaped miniature lamp; Fig. 2 is an analytic perspective view of a conventional Christmas lamp; Fig. 3 is an analytic perspective view of a conventional elongated miniature lamp; Fig. 4 is an analytic perspective view of an embodiment of the present invention; Fig. 5 is a partial sectional view of the embodiment shown in Fig. 4; Fig. 6 shows another embodiment of the present invention; Fig. 7 shows a further embodiment of the present invent ion.

Referring firstly to Fig. 4, taking Christmas lamps as an example, the present invention is also provided with two conductors 51, 52 in a Christmas lamp bulb 50 thereof, the conductors 51, 52 are positioned by a burned bead 53, a tungsten filament 54 is provided on the top of the conductors 51, 52, the present invention is characterized mainly in that, the outwardly extending ends 55, 56 of the conductors 51, 52 are bended to be close to the two lateral sides 58, 59 of a flat insertion connecting end 57 of the lamp bulb 50, meanwhile, two raised strips 570 are provided respectively on the front and the rear surfaces of the flat insertion connecting end 57, and an appropriate engaging protrusion 571 is provided on each of the two raised strips 570.

The above stated Christmas lamp bulb 50 can therefore be assembled in the connecting hole 61 of a connecting base 60, now the engaging protrusions 571 on the flat insertion connecting end 57 can be snap engaged with two engaging lugs 64, 65 on the wall of the connecting hole 61; the outwardly extending ends 55, 56 of the conductors 51, 52 bended to be close to the two lateral sides 58, 59 of the flat insertion connecting end 57 are directly press connected with two internal power line metal sheets 62, 63 provided in the connecting hole 61 (referring to Fig. 5). Thereby, no intermediate (plastic) cap is required as is the case of the above stated conventional structure.

In another embodiment such as is shown in Fig. 6, the present invention is also provided with a flat insertion connecting end 71 at the lower portion of the lamp bulb 70, the outwardly extending ends 74, 75 of two conductors 72, 73 provided therein are bended to be close to the two lateral sides of the flat insertion connecting end 71, so that they can be connected directly with two power line metal sheets 77, 78 provided in the connecting hole of a connecting base 76. In order to increase the capability of positioning of such insertion, the flat insertion connecting end 71 mentioned above can also be provided with two raised strips 79 and two engaging protrusions 791 rspectively on the front and the rear surfaces thereof. It can be seen from this embodiment that, the embodiment can save the four originally necessary internal metal contact sheets in conventional arts such as is the case of the first type of the ordinary miniature lamps.

In another embodiment of an elongated lamp such as that shown in Fig. 7, the present invention is also provided with two conductors 81, 82 in the lamp bulb 80, the outwardly extending ends of the conductors 81, 82 are bended to be close to the two lateral sides of a flat insertion connecting end 83 of the lamp bulb 80, the whole lamp bulb 80 can therefore be assembled directly in the connecting hole 85 with a metallic surface of a connecting base 84, and two raised strips 86 and two engaging protrusions 861 provided thereon can be snap engaged with two engaging lugs 87 on the wall of the connecting hole of the connecting base 84, the protruding sections of the conductors 81, 82 on the lateral sides are press contacted with the internal power line metal sheets 88, 89 to thereby save a metal cap conventionally required at the bottom of the miniature lamp bulb 80.

In view that the miniature lamp sets available in the markets are almost mass produced, unit price thereof is very low, so that their competitiveness and yield of production can both be increased, and because the present invention can save internal metal contact sheets or caps, it owns a great economic benefit in production, and thus has high industrial value.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, what I claim will be declared in the claims followed.

Claims

1. An improved connecting structure for a miniature lamp, it is comprised of in the glass lamp bulb thereof: two conductors positioned by a burned bead, a tung -sten filament of specific length being provided between the top of the conductors, the lower ends of the conductors extend outwardly of a flat insertion connecting end of the lamp bulb; the structure is characterized in that: the outwardly extending ends of the conductors are bended to be positioned on the two lateral sides of the flat insertion connecting end, so that they can be connec -ted directly with two power line metal sheets provided in a connecting base.

2. An improved connecting structure for a miniature lamp as claimed in claim 1, wherein, the flat insertion connecting end is provided with two raised strips, and an engaging protrusion is provided on each of the two raised strips, two engaging lugs correspondingly provided to the two engaging protrusion are located on the wall of a connecting hole in the connecting base.

3. A lamp bulb comprising a bulb portion and a flat insertion portion for insertion into an electrical socket, the bulb portion containing a filament which is connected to a pair of electrical conductors, the free ends of the conductors being directed along respective edges of the flat insertion portion.

4. A lamp bulb as claimed in claim 3, wherein the conductors emerge from the end of the insertion potion away from the bulb portion and are bent up at their free ends to extend along respective edges of the insertion portion.

5. A lamp bulb as claimed in claim 3 or 4, wherein a flat face of the insertion portion is provided with a locating projection and the electrical socket is shaped to engage the projection when the insertion portion of the lamp bulb is inserted into the socket.

6. A lamp bulb as claimed in claim 5, wherein the electrical socket is provided with a corresponding recess or second projection which engages the locating projection when the insertion portion of the lamp bulb is inserted into the socket.

7. A lamp bulb substantially as described herewith, with reference to and as shown in Figures 4 to 7 of the accompanying drawings.