JPH0413817B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The inventive incandescent lamp will be described in accordance with the following items.

A. Field of industrial application B. Outline of the invention C. Prior art [Figure 5] D. Problem to be solved by the invention E. Means for solving the problem F. Example [Figures 1 to 4] a. Glass Ball b Holding plate c Base part c-1 Base body c-2 Outer shell part, contact piece c-3 Core part, support pin c-4 Connection between outer shell part and core part d Connection between glass bulb and base part G. Effects of the invention (A. Field of industrial application) The present invention relates to a novel incandescent light bulb. For more information,
An incandescent light bulb with a base body made of synthetic resin, which is designed to prevent the filament from being misaligned in the direction perpendicular to the axis of the glass bulb when attaching the glass bulb to the base, and to It is an object of the present invention to provide a novel incandescent light bulb that can be easily formed.

(B. Summary of the Invention) The incandescent light bulb of the present invention has a plurality of support pins protruding from the base, and an insertion hole through which the support pins are slidably inserted in the holding plate holding the glass bulb. By welding the holding plate to the support pin with the support pin inserted into the insertion hole, the relative rotational movement between the holding plate and the mouthpiece body is completely prevented, thereby making it possible to Prevents the filament from being misaligned in the direction perpendicular to the axis of the glass bulb when attaching the glass bulb,
Further, the cap part is provided with two synthetic resin parts, an outer shell part and a core part fixed to the outer shell part, and a support pin provided in the cap part to hold the glass bulb is implanted in the core part. By fixing the core part to the outer shell part, a base part with a protruding support pin is formed, thereby making it easier to attach the support pin to the base part. .

(C. Prior Art) [Fig. 5] An incandescent light bulb having a base body made of synthetic resin has been proposed. An example of such an incandescent light bulb is shown in FIG. This incandescent light bulb a is shown in US Pat. No. 4,412,273.

b is a base body made of synthetic resin, and terminals c, c, c are protruded from the rear end thereof. Further, a cylindrical metal tube d is fixed to the front end of the base body b, and welding pieces e, e,
...is installed protrudingly.

Reference numeral f denotes a metal cap holding a glass bulb g, which is slidably fitted into the metal cylinder d.

In order to align the filament h enclosed in the glass bulb g, the cap body f is slid against the metal tube d to adjust the positional relationship between the filament h and the cap body b. Once the positional relationship is determined, weld pieces e, e,
... and the cap body f are fixed by spot welding or the like.

(D Problems to be Solved by the Invention) In the conventional incandescent light bulb a described above, its structure makes it possible to adopt the base body b made of synthetic resin, but the axial direction of the glass bulb g There is a problem in that the position of the filament h in the direction perpendicular to is likely to be misaligned.

That is, the metal cylinder d fixed to the base body b and the cap body f holding the glass bulb g are connected by fitting their cylindrical parts to each other, and are slidable in the axial direction. is being used. Therefore, such a fitted state also allows mutual movement in the rotational direction, which may cause the filament h to shift from its normal position in the rotational direction.

Therefore, it is conceivable to provide a plurality of support pins protruding from the cap and fix the holding plate holding the glass bulb to the support pins, but if so-called insert molding is used to provide the support pins in the cap, , for example, a slide mold must be used, resulting in poor workability.

(E. Means for Solving the Problems) In order to solve the above-mentioned problems, the inventive incandescent light bulb has a plurality of supports provided in the base portion through a plurality of insertion holes provided in the holding plate holding the glass bulb. This is an incandescent light bulb in which a holding plate and a support pin are fixed with the pin inserted, and the base has two synthetic resin parts, an outer shell part and a core part fixed to this part, and the support pin is first attached to the core part. By implanting the core into the outer shell and connecting the core to the outer shell, a support pin is provided to protrude from the base.

Therefore, according to the incandescent light bulb of the present invention, the holding plate holding the glass bulb is fixed with the plurality of support pins protruding from the cap portion inserted into the plurality of insertion holes formed in the holding plate. In particular, since the filament is connected to the cap, the position of the filament in the direction perpendicular to the axis of the glass bulb will not be misaligned when the glass bulb is attached to the cap.

Since the support pin is first implanted in the core part which will be fixed to the outer shell later, the support pin can be inserted into the base without the troublesome work of insert molding, and without using a slide mold. Since it can be provided in the part, the formation of the cap part can be facilitated.

(Embodiment F) [Figs. 1 to 4] Details of the inventive hot bulb will be described below with reference to illustrated embodiments. In the illustrated embodiment, the present invention is applied to a halogen light bulb 1.

(a Glass bulb) 2 is a glass bulb of the halogen light bulb 1, one end of which is closed with a substantially flat pinch seal part 3, and the other end of which is closed with an exhaust part 4 to form a hermetically sealed state, and there is nothing inside. Filled with active gas and certain halogens.

5, 5 are lead wires, 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 part 5 inside the glass bulb 2
The portions a and 5a are internal lead wires, and the portions 5b and 5b led out from the pinch seal portion 3 are external lead wires. And internal lead wires 5a, 5
A filament 6 is stretched between the tips of a.

(b Holding plate) 7 is a holding plate for holding the glass bulb 2 and connecting it to the base body described below,
It is made of a metal plate.

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

The metal band 8 is the pinch seal part 3 of the glass bulb 2
It is bent so as to form a substantially rectangular shape so as to be wrapped around the periphery, and connecting pieces 8a, 8a are formed at the portions where both ends meet.

Then, the metal band 8 is wrapped around the pinch seal portion 3 of the glass bulb 2, and in this state, the connecting piece 8
a and 8a are joined together by spot welding or the like. In this way, the metal band 8 is attached to the pinch seal portion 3.
Fixed.

The connecting plates 9, 9, and 10 are all provided along the rear edge of the long side of the metal band 8, that is, the edge on the opposite side to the side where the glass bulb 2 is located.

The connecting plates 9, 9 are connecting pieces 8 of the metal band 8.
The other connecting plate 10 is bent at a substantially right angle from the rear edge of the metal band 8 connecting pieces 8a, 8a, and the other connecting plate 10 is bent outward from the rear edge of the long side opposite to the long side where the metal band 8 connecting pieces 8a, 8a are located. It is formed by being bent at a substantially right angle toward the direction.

Then, one piece each on the connecting plates 9, 9,
Two insertion holes 11, 11, . . . are formed in the connecting plate 10 at intervals, and each insertion hole 1
The opening edges of 1, 11, . . . are slightly raised toward the front and are formed into a short cylindrical shape.

Reference numeral 12 denotes a cap part, and the cap body 1 is made of synthetic resin.
3, two contacts 14, 14, and
It consists of four support pins 15, 15, .

(c-1 Base Body) The base body 13 mainly consists of an outer shell part 16 defining the outer periphery thereof and a core part 17 fixed inside the outer shell part 16.

(c-2 Outer shell part, contact piece) The outer shell part 16 is formed by molding a synthetic resin, and includes a glass bulb holding part 18 and a connector part 19.
and are formed integrally or integrally.

The glass bulb holder 18 has a recess 20 opened on the front side.
have.

21 is a flange formed integrally with the glass bulb holding part 18, 22 is an annular groove formed on the front side of the flange 21, and an O-ring-shaped seal ring 23 is fitted into the annular groove 22. It will be worn.

The connector portion 19 is provided so as to protrude laterally from the rear end portion of the glass bulb holding portion 18, and has a receiving recess 24 opened laterally.

The contact pieces 14, 14 are made of conductive metal, and are bent to form a substantially L-shape. Then, such contact pieces 14, 14
The intermediate portion thereof is held in the rear half of the glass bulb holding portion 18 in the outer shell portion 16 in an embedded manner.
Such an outer shell portion 1 of the contact pieces 14, 14
The holding at 6 is achieved, for example, by insert molding.

The contact pieces 14, 14 are held in the outer shell 16 as described above, and their one ends 14a, 1
4a is located within the receiving recess 24 of the connector portion 19, and the other end thereof is slightly protruded from the front end of the glass bulb holding portion 18.

(c-3 Core part, support pin) The core part 17 is also formed by molding synthetic resin, and is formed to a size that can be tightly fitted into the recess 20 formed in the outer shell part 16. has been done.

Numerals 25 and 25 are insertion grooves formed to extend in the axial direction of the core portion 17. These insertion grooves 25, 25 are connected to the contact pieces 14, 14.
It is formed corresponding to the other end portions 14b, 14b.

26, 26, . . . are embedded holes formed to open at the front end surface of the core portion 17, and are embedded in the insertion groove 2.
They are formed at positions avoiding the positions 5 and 25 and corresponding to the four corners of a substantially square. Also,
The embedding holes 26, 26, . . . are arranged at the same intervals as the insertion holes 11, 11, .

The support pins 15, 15, . . . have an outer diameter slightly larger than the hole diameter of the buried holes 26, 26, . ... has been applied.

These support pins 15, 15, .
26,..., and in this state, the support pins 15, 1 of the core part 16 are heated by high frequency heating.
The base ends of the support pins 15, 15, . . . are embedded by a predetermined amount into the embedding holes 26, 26, .
As a result, the support pins 15, 15, . . . are supported by the core portion 17 in a state protruding from its front end surface.

(c-4 Coupling of Outer Shell Part and Core Part) Therefore, the core part 17 is fitted into the recess 20 formed in the outer shell part 16 and fixed. At this time, the other end portions 14b, 14b of the contact pieces 14, 14 held by the outer shell portion 16 are inserted through the insertion grooves 25, 25 formed in the core portion 17, and are made to protrude from the front end surface of the core portion 17. .

Note that the core portion 17 is fixed to the outer shell portion 16 by adhesive,
Any appropriate means such as fusion by high frequency heating may be used.

(d. Joining the glass bulb and the cap part) The glass bulb 2 is joined to the cap part 12 in the following manner.

That is, first, the support pins 15, 15, ... provided on the cap part 12 are inserted into the insertion holes 11, 11, ... formed in the connecting plates 9, 9, and 10 of the holding plate 7 holding the glass bulb 2. . Then, the support pins 15, 1 are connected to the insertion holes 11, 11, .
5,... to adjust the positional relationship between the flange 21 provided on the mouthpiece body 13 and the filament 6 sealed in the glass bulb 2, and once the positional relationship is adjusted, plastic arc welding, etc. The connecting plates 9, 9 and 10 of the holding plate 7 are attached to the support pins 15, 15, . . . by suitable welding means.
Fixed to.

With this, the glass bulb 2 is attached to the holding plate 7,
It is supported by the base portion 12 via support pins 15, 15, .

The external lead wires 5b, 5b led out from the glass bulb 2 are connected to the other ends 1 of the contacts 14, 14.
4b and 14b by spot welding or the like.

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

(G Effect of the Invention) As is clear from the above description, the inventive white light bulb has a plurality of insertion holes formed in the holding plate that holds the glass bulb, and holds the plurality of support pins provided in the base. An incandescent light bulb that fixes a holding plate and a support pin while being inserted into the insertion hole of the plate, wherein the base has two synthetic resin parts, an outer shell part and a core part fixed to the outer shell part. ,
The support pin is characterized in that the rear core part implanted in the core part is coupled to the outer shell part, so that the support pin projects from the base part.

Therefore, according to the incandescent light bulb of the present invention, the holding plate holding the glass bulb is fixed with the plurality of support pins protruding from the cap portion inserted into the plurality of insertion holes formed in the holding plate. In particular, since the filament is connected to the cap, the position of the filament in the direction perpendicular to the axis of the glass bulb will not be misaligned when the glass bulb is attached to the cap.

Since the support pin is first implanted in the core part which will be fixed to the outer shell later, the support pin can be inserted into the base without the troublesome work of insert molding, and without using a slide mold. Since it can be provided in the part, the formation of the cap part can be facilitated.

In the above description of the embodiments, an example was shown in which the present invention was applied to a halogen light bulb, but it goes without saying that the present invention can also be applied to other incandescent light bulbs other than halogen light bulbs.

[Brief explanation of drawings]

Figures 1 to 4 show an example of the application of the present invention to a halogen light bulb, in which Figure 1 is a perspective view, Figure 2 is an exploded perspective view, Figure 3 is a vertical sectional view, FIG. 4 is a side view, and FIG. 5 is a side view showing an example of a conventional incandescent light bulb. Explanation of symbols, 1... Incandescent light bulb, 2... Glass bulb, 7... Holding plate, 11... Holding plate insertion hole, 12... Base part, 15... Support pin,
16... Outer shell part, 17... Core part.

Claims (1)

[Scope of Claims] 1. A plurality of insertion holes are formed in a holding plate that holds a glass bulb, and the holding plate and the support pins are inserted with a plurality of support pins provided in the cap part inserted into the insertion holes of the holding plate. An incandescent light bulb to be fixed, wherein the base has two synthetic resin parts, an outer shell part and a core part fixed to the outer shell part, and the support pin is attached to a rear core part implanted in the core part. An incandescent light bulb characterized in that the support pin is coupled to the outer shell so that the support pin protrudes from the base.