JPS622450A - Manufacture of incandescent lamp - 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 [Technical Field of the Invention] The present invention provides an incandescent light bulb, e￥F, with a pinch-sealed sealing part. For example, the present invention relates to a fixing structure for a base of a halogen light bulb for an automobile.

[Technical background of the invention and its problems]

- Cap cement is used to fix the cap to the sealed bulb in incandescent light bulbs for general lighting, but in small-capacity, high-output light bulbs such as non-rogen bulbs for automobiles, glass bulbs are heated to high temperatures. This may cause the base cement to deteriorate in a relatively short period of time and lose adhesive strength.

For incandescent light bulbs, where glass bulbs are heated to high temperatures, a method called mechanical basing is known in which the cap is mechanically attached to a sealed bulb without the use of cap cement. The glass bulbs of norogen light bulbs, such as those for automobiles, are made of quartz glass that can withstand high temperatures, and the shape of the seal is rectangular in cross section, which is obtained by pinch-sealing the molybdenum foil and sealing wire leading to the tungsten filament.

Generally, the pinch seal portion is fixed to an inner shell, and the inner shell is fixed to a cylindrical outer shell.

However, when the outer diameter of the glass bulb is about 10 m or less, the contact pressure of the contact piece of the inner shell of the cap that clamps the pinch seal part is small, and therefore the fixing strength of the pinch seal part tends to weaken.

Furthermore, if force is applied when fixing the inner shell to the outer shell, the glass bulb is likely to shift and the distance between the center of light from the 7-lunge to the filament after the incandescent bulb is completed is likely to shift.

[Purpose of the invention]

The present invention has been made to solve the above problems, and it is possible to reliably fix the pinch seal portion of a sealed valve to the inner shell, and furthermore, it is possible to fix the inner shell at an accurate position on the outer shell. It is an object of the present invention to provide an easy and improved method for manufacturing an incandescent light bulb.

[Summary of the invention]

The present invention is provided with a plate material having a circular arc contacting the inside of the outer shell of the cap, which is provided with a contact piece that clamps the long diameter side of the pinch seal part of the pinch-sealed sealed valve, and whose end part is larger than the inner diameter of the outer shell. The method includes the step of fitting the expanded inner shell into the outer shell of the cap and pushing the outer shell inward toward the recessed hole provided in the plate material of the inner shell to fix the sealed valve to the cap. This is a method for manufacturing an incandescent light bulb.

[Embodiments of the invention]

The details of the present invention will be explained with reference to an illustrated embodiment. FIG. 1 is a front view of a halogen light bulb for an automobile showing an embodiment of the present invention, FIG. 2 is an exploded perspective view of FIG. 1, and FIG. 3 is a perspective view of an intermediate assembly structure.

The sealed bulb (2) of the halogen bulb (1) has a mount (6) in which the tungsten filament (4) is connected to the inner conductor (5) sealed inside the glass bulb (3). The lower end of the glass bulb (3) is pinch-sealed so that a pinch-sealed portion (a force is formed) and an outer conductor (8) led out from the mount (6) extends from the glass bulb (3).

The sealed valve (2) is fitted into the inner shell (9) of the cap, which will be described in detail below. The metal inner shell (9) is connected to the lower end of the pinch seal part (7) of the glass bulb (3), and the plate members Uυ and H, which are provided with circular arcs from opposite sides of the plate σC, stand up. , the above plate material αυ,
(L2 is a bridge that expands and protrudes outward from the rising edge of plate a1. Therefore, the gap between the edges of plates aυ and α (bl) is determined from the dimension (a) on the rising side of plate α1. It has spread to about 311. Also.

Plate materials αυ, aa K are the pinch seal parts of the sealed valve (2) (the contact pieces α and α3 and α4 that clamp the long diameter side of the force)
, (14) are provided, and the contact pieces α~, (13
Between (14 and α4, there is a through hole αs passing through plate αυ, (I3, and (Le).Furthermore, in the center of plate 01, there is a sealed end αD of the exhaust pipe of the sealed valve (2). A through hole H is drilled into which the above-mentioned receiver is inserted.Furthermore, the plate material aυ of plate α0 and the long diameter of the pinch seal part (7) of the sealed valve (2) are located on the opposite side of the plate α0 and α2 do not stand up. A restraining piece (11, (2G) is provided at the center of the side.

The perspective view of FIG. 3 shows a state in which the inner shell (9) of the K cap of the sealed valve (2) is fitted.

The valve fitted with the inner shell (9) shown in Fig. 3 above (
2) into the opening (22) K of the outer shell (21) of the cap. The plate Ql of the inner shell (9) is the outer shell (2
The opening (22) of 1) has dimensions that allow K to be inserted, and the ends of the plates aυ and α2 are wider than the inner diameter of the outer shell (21), so the inner shell (9)
When pushed into the outer shell (21), the plate αυ and the housing
is pressed along the inside of the outer shell (21) [The pressed plates αυ and (12) are in close contact with the inside of the outer shell (21), and the contact piece 0.α provided on the plate (1υ, H) firmly supports the pinch seal portion (7).Next, when the outer shell (21) of the cap is pressed from the outside in the direction of arrow (A) with a punch, the punched dent in the outer shell will be The punch holes (23), (24) are pushed into the through holes α9 of the inner shell (9) and fitted, as shown in Fig. 1.
is configured. The through hole (151, α) of the inner shell (9)
e may be a concave hole. (25) is the outer shell of the cap (21)
It is a pin provided in the socket for fitting into the socket,
(26) is the eyelet glass of the cap, (27) is the eyelet, and (28) is the solder that conductively connects one of the outer conductors to the eyelet (27).

〔Effect of the invention〕

The present invention is provided with a plate material having a contact piece that clamps the long diameter side of the pinch seal part of the sealed valve, and having a circular arc that contacts the inside of the outer shell of the cap, and the end part is formed to be larger than the inner diameter dimension of the outer shell. It is characterized by the step of fixing the sealed valve to the cap by fitting the inner shell into the outer shell of the cap and pushing the outer shell inward toward the recessed hole provided in the plate material of the inner shell. A method for manufacturing an incandescent light bulb.

For example, in the production of incandescent light bulbs with pinch-sealed parts, such as halogen light bulbs for automobiles, the pinch-seal parts are securely held.

By pushing the plate material into the outer shell, the inner shell and outer shell are firmly fixed, and the pinch seal part is firmly fixed, so there is no possibility that the glass bulb will shift and the optical center distance will change. An improved method of manufacturing an incandescent light bulb is capable of emitting light output.

[Brief explanation of the drawing]

FIG. 1 is a front view of a halogen light bulb for an automobile manufactured by an embodiment of the manufacturing method of the present invention, FIG. 2 is an explanatory diagram of the assembly process of the light bulb of FIG. 1, and FIG. 2 is a perspective view of an intermediate assembly process. Sealed valve;
3...Glass bulb. 7...Pinch seal part. 9... Inner shell, 10... Uke is board. 11, 12...Plate material, 13, 14
・・・・・・Touch piece. 21... Outer shell of the base.

Claims (1)

[Claims] A plate member is provided with a contact piece that clamps the long diameter side of the pinch seal part of the pinch-sealed sealed valve, and has a circular arc that contacts the inside of the outer shell of the cap, and the end part thereof is expanded to be larger than the inner diameter of the outer shell. The method includes the step of fitting the formed inner shell into the outer shell of the cap and pushing the outer shell inward toward the recessed hole provided in the plate material of the inner shell to fix the sealed valve to the cap. A method for manufacturing an incandescent light bulb, characterized by: