JPS62274548A - Electric bulb with base - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] 3. Detailed description of the invention The light bulb with base of the present invention will be explained according to the following items.

A. Industrial field of application B1 Overview of the invention C1 Prior art [Fig. 8] B1 Problems to be solved by the invention E1 Means for solving the problems F. Examples [Figs. 1 to 7] a, Glass bulb [Figures 1 to 3, b, Holding plate [Figures 1 to 3, C1, B, Gold body [
[Figures 1 to 7] c-1, outer shell part c-2, contact piece c-3, core part c-4, holding part c-5, connection d of outer shell part and core part, glass bulb Effects of the invention (A. Field of industrial application) The present invention relates to a novel electric lamp with a base. Specifically, it is a light bulb with a base that holds a glass bulb with a filament sealed in a base body made of synthetic resin, and a connector part is integrally formed in the base body. The aim is to provide a new light bulb with a cap that is lighter in weight and has improved accuracy.

(B. Summary of the Invention) The light bulb with a base of the present invention has a base body made of synthetic resin that holds a glass bulb in which a filament is sealed, and
In a light bulb with a base in which the base body and the connector part are integrally formed, the base body is divided into an outer shell part integrally equipped with the contact piece of the connector part and a core part equipped with a holding part that holds the glass bulb. By fitting and integrating the core part with the front end of the outer shell part, it is possible to create a hollow part between the outer shell part and the core part, thereby reducing the amount of synthetic resin used. This makes it possible to reduce weight and improve accuracy.

(C, Prior Art) [Fig. 8] For example, in a light bulb with a base, a glass bulb with a filament sealed in the base body made of synthetic resin is held, and a connector part is integrally formed in the base body. There is something like the one shown.

In FIG. 8, reference numeral a denotes a synthetic resin base body, and a glass bulb is held in this base body a.

Reference numeral C denotes a connector portion integrally formed so as to protrude laterally from the rear end portion of the base body a.

The connector portion C has a space d that opens laterally, and one end of the contact pieces e and e is located within this space d.
1 is located. Further, the other ends e2, e2 of the contact pieces e, e protrude from the front end of the base body a.

f, f, . . . are support bottles, the base end of which is embedded in the front end of the base body a, and the glass bulb is inserted through the support bottles f, f, . It is supported by the base body a.

An external lead wire (not shown) protruding from the rear end of the glass bulb is connected to the other end e2 of the contact piece e%e,
Connected to e2.

Thus, the contact pieces e% e described above are obtained by inserting a part of the contact pieces e into the cavity of the molding die when molding the base body a, and then injecting molten resin into the cavity. It is integrated into the mouthpiece body a by so-called insert molding.

(D. Problem to be solved by the invention) By the way, the 8th problem
If the cap body a of the light bulb with a cap shown in the figure is made into a complete one-piece structure, most parts of the cap body a will have a solid structure, so synthetic resin material will be used even in unnecessary parts. As a result, there is a problem that not only is there a waste of material, but also that the weight of the cap body a becomes heavy. Furthermore, the presence of large volume parts means that
There will be a significant difference in the cooling rate between the area near the outer surface and the area near the center, and the appearance will be impaired due to the formation of recesses called "sink marks" on the surface of the area. However, there is a problem in that, in some cases, it may even affect dimensional accuracy.

(E. Means for Solving the Problems) In order to solve the above-mentioned problems, the light bulb with a base of the present invention has a base body made of synthetic resin that holds a glass bulb in which a filament is encapsulated, and In a light bulb with a base in which a connector part is integrally formed in the base body, the base body is divided into an outer shell part integrally equipped with a contact piece of the connector part and a core part equipped with a holding part that holds a glass bulb. The core portion is fitted and integrated with the front end portion of the outer shell portion.

Therefore, according to the present invention, it is possible to create a hollow part between the outer thigh part and the core part, thereby reducing the amount of synthetic resin used, reducing weight and improving precision. becomes possible.

(F. Example) [Figs. 1 to 7] Details of the light bulb with base of the present invention will be described below according to the illustrated example. In the illustrated embodiment, the present invention is applied to a halogen light bulb 1.

(a, glass bulb) [Figures 1 to 3] 2 is a glass bulb of a halogen light bulb 1, one end of which is closed with a substantially flat pinch seal part 3, and the other end closed with an exhaust part 4. It is sealed, and the inside is filled with inert gas and a specified halogen.

5.5 is a lead wire, the middle part of which is held in the pinch seal part 3 so as to pass through it in the axial direction, and the parts 5a, 5a inside the glass bulb 2 are used as internal lead wires, Portion 5 led out from the pinch seal portion 3
b. The wire is used as an external lead wire. A filament 6 is stretched between the tips of the internal lead wires 5a, 5a.

(b, Holding Plate) [Figures 1 to 3] Reference numeral 7 denotes a holding plate for holding the glass bulb 2 and connecting it to the base body, which will be described later, and is formed of a metal plate.

The holding plate 7 is formed by integrally forming a metal band 8 and connecting plates 9, 9, 10.

The metal band 8 is bent so as to be wrapped around the pinch seal portion 3 of the glass bulb 2 so as to form a substantially rectangular shape when viewed from the front and rear directions, and a connecting piece 8 is provided at the portion where both ends meet.
a, 8a are formed.

The metal band 8 is connected to the pinch seal portion 3 of the glass bulb 2.
In this state, the connecting pieces 8a, 8a are connected by spot welding or the like.

In this way, the metal band 8 is fixed to the pinch seal portion 3.

The connecting plates 9.9 and 10 are both provided along the rear end edge of the long side of the metal band 8, ie, along the edge on the opposite side to the side where the glass bulb 2 is located.

The connecting plates 9.9 are the connecting pieces 8a, 8a of the metal band 8.
It is formed by being bent at a substantially right angle from the rear edge,
Another connection plate 10 is a connection piece 8 of the metal band 8.
They are formed by being bent outward at a substantially right angle from the rear end edge of the long side opposite to the one long side a, 8a.

The connecting plate 9.9 has one insertion hole each, and the connecting plate 10 has two spaced insertion holes 11.11.
... are formed, and the opening edge of each insertion hole 11, 11, ... is slightly raised toward the front, and is formed in a short cylindrical shape.

(c, Base Body) [Figs. 1 to 7] Reference numeral 12 denotes a base body, and the base body 12 consists of an outer shell and a core that is fitted and fixed to the front end of the outer shell.

(c-1, Outer shell part) 13 is an outer shell part, which is formed by molding a synthetic resin, and integrally holds the contact piece.

The outer shell portion 13 includes a main portion 14 having a substantially circular shape and a connector portion 15 integrally projecting sideward from the rear end of the main portion 14.
It consists of The connector portion 15 has a substantially oval cylindrical shape with a small size in the vertical direction, and has a recess 16 that opens laterally.

The main portion 14 is formed with a recess 1 which opens at the front end and reaches approximately the rear end, and the front end of the recess 17 is formed into a large diameter portion 18 having an inner diameter larger than the other portion. Further, the main portion 17 has a rear end portion 19 that is slightly thicker than other portions.

A positioning protrusion 20 extending along the axial direction of the main portion 14 is integrally formed on the inner surface of the large diameter portion 18 .

Reference numeral 21 denotes a flange that projects laterally from the outer surface of the main portion 14 near the front end.

(c-2, contact piece) 22 and 23 are contact pieces made of a conductive material.

Each of these contact pieces 22 and 23 has a side surface shape of L.
It has a letter-shaped shape, and the vicinity of the L-shaped bent portion is embedded in the rear end portion 19 of the main portion 14 of the cap body 12 . That is, the main portion 14 and the contact pieces 22, 23 are integrally joined by so-called insert molding.

One end 22a of these contact pieces 22, 23
, 23a protrude into the recess 16 of the connector portion 15 and serve as a connector piece.

Further, the parts 22b, 23b to which the other ends of the contact pieces 22, 23 belong are lead pieces that extend along the axial direction of the recess 17 of the main part 14, and their front ends slightly protrude from the front end of the recess 17. ing.

A portion 22 embedded in the rear end portion 19 of the main portion 14
c and 23c are bent into a substantially crank shape when viewed from the front. As a result, when viewed from the front, the lead pieces 22b and 23b are substantially aligned along a line that intersects the central axis of the main part 14 and extends in the axial direction of the connector part 15, and are located on opposite sides across the word line. It is arranged so that

By arranging the lead pieces 22b and 23b in this manner, they can be arranged near the central axis of the main portion 14, and a relatively large distance can be maintained between them.

(C-3° Core Part) 24 is a core part, which is formed by molding a synthetic resin.

The core portion 24 has a cylindrical front surface with a short axial length and is connected to the front plate 2.
It has a shape that looks like it is closed by 5.

Reference numeral 26 denotes a grooved portion formed on the outer circumferential surface of the cylindrical portion of the core portion 24 along the axial direction.

Slits 27.28 are formed in the center of the front plate 25 of the core portion 24, and these slits 27.2
8 is the lead piece 22b, 23b of the contact piece 22, 23
The lead piece 22b123b is formed in a positional relationship corresponding to the positional relationship of the lead piece 22b123b. In addition, the rear end opening edge 27a12 of the slit 27.28
8a is expanded into a chamfered shape to facilitate insertion of the lead piece 22b123b.

Note that 24a is a welding rib formed on the rear end surface of the cylindrical portion.

(c-4, holding part) 29. 29, . . . are support bottles serving as holding parts for holding the glass bulb 2 on the base body 12.

The bases of these support bins 29, 29, . . . are embedded in the front plate 25 of the core portion 24 by so-called insert molding, and project forward from the front plate 25. These positions correspond to the positions of the insertion holes 11, 11, . . . formed in the holding plate 7.

(c-5, Coupling the outer shell part and the core part) Therefore, the core part 24 fits into the front end of the recess 17 formed in the main part 14 of the outer thigh part 13, that is, into the large diameter part 18. be done. At this time, the projections 20 formed on the large diameter portion 18 engage with the grooves 26 formed on the core portion 24, thereby positioning the outer shell portion 13 and the core portion 24,
The lead pieces 22b and 23b of the contact pieces 22 and 23 form slits 27 and 28 formed in the front plate 25 of the core part 24.
, and the front ends of the lead pieces 22b, 23b are made to protrude forward from the front plate 25 inside the support bins 29, 29, .

In this state, the outer shell part 13 and the core part 24 are integrally joined by ultrasonic welding to form the base body 12. At this time, the welding rib 24a is melted and welded to the bottom surface of the large diameter portion 18.

Note that the connection between the outer shell part 13 and the core part 24 is not limited to ultrasonic welding, but may be performed by other means, such as adhesion.

(d. Combining the glass bulb and the cap body) The glass bulb 2 is coupled to the cap body 12 in the following manner.

That is, first, the support pin 29 provided on the base body 12.
29, . . . are the insertion holes 11. formed in the connection plates 9.9 and 10 of the holding plate 7 holding the glass bulb 2.
Insert into 11,...

Then, the support pin 2 is inserted into the insertion hole 11.11,...
9. The positional relationship between the flange 21 provided on the cap body 12 and the filament 6 sealed in the glass bulb 2 was adjusted by sliding 29, . . . By the way, the connecting plates 9.9 and 10 of the holding plate 7 are bonded by appropriate welding means such as plasma arc welding.
are fixed to the support pins 29, 29, .

As a result, the glass bulb 2 is supported by the base body 12 via the holding plate 7, support pins 29, 29, . . . .

And an external lead wire 5b led out from the glass bulb 2,
5b is the lead piece 22b, 23 of the contact piece 22.23
It is connected to the front end of b by spot welding or the like.

In the manner described above, the glass bulb 2 is coupled to the base body 12, and the halogen light bulb 1 is formed.

(G. Effects of the Invention) As is clear from the above description, the light bulb with a cap of the present invention has a cap body made of synthetic resin that holds a glass bulb in which a filament is sealed, and a connector part in the cap body. A light bulb with a base integrally formed with the base body, the base body being formed from an outer shell part and a core part that is fitted and integrated with the front end part of the outer shell part, and a connector part provided in the outer shell part and the base part being integrated with the front end part of the outer shell part. A contact piece is integrally fixed to the connector part by insert molding, one end of the contact piece is located inside the connector part, the other end extends to the front end of the outer shell part, and a glass bulb is attached to the core part. The present invention is characterized in that a holding part for holding the contact piece and an insertion part for inserting the other end of the contact piece and projecting it from the front surface of the core part are formed.

Therefore, according to the present invention, it is possible to create a hollow part between the outer shell part and the core part, thereby reducing the amount of synthetic resin used, reducing weight and improving precision. becomes possible.

[Brief explanation of the drawing]

Figures 1 to 7 show an example of an embodiment in which the light bulb with a cap of the present invention is applied to a halogen light bulb, with Figure 1 being an exploded perspective view, Figure 2 being a perspective view, and Figure 3 being a longitudinal sectional view. , Figures 4 to 6 show the base body, Figure 4 is a front view, Figure 5 is a front view, and Figure 5 is a front view.
FIG. 6 is a rear view, FIG. 6 is a view taken in the direction of the ■ arrow in FIG. 4, FIG. 7 is a partially cutaway perspective view of the core portion, and FIG. 8 is a longitudinal cross-sectional view showing an example of a conventional light bulb with a base. Explanation of symbols 1...Light bulb with base, 2...Glass bulb, 6...
filament, 12... base body, 13... outer shell part, 15...
・Connector part, 22.23... Contact piece, 22a, 23a... One end of contact piece, 22b, 2
3b...Other end of contact piece, 24...Core part, 27.28...Insertion part, 29...Holding part screw vr
Figure 3 Two-side view Figure 4 Back view Figure 5 Figure 6 Figure 7 Figure 8

Claims (1)

[Scope of Claims] A light bulb with a cap, in which a cap body made of synthetic resin holds a glass bulb in which a filament is sealed, and a connector part is integrally formed with the cap body, the cap body being an outer shell part. and a core part that is fitted and integrated with the front end part of the outer shell part, a connector part is provided in the outer shell part, and a contact piece is integrally fixed to the connector part by insert molding, and the contact piece One end is located within the connector part, the other end extends to the front end of the outer shell part, the core part has a holding part for holding the glass bulb, and the other end of the contact piece is inserted through the core part. A light bulb with a base, characterized in that an insertion part is formed to project from the front surface of the core part.