JPS5960961A - Incandescent bulb - 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 The present invention relates to an incandescent light bulb such as a halogen incandescent light bulb.

For example, halogen incandescent light bulbs are used as light source light bulbs for automobile front lighting because they are small, have high luminous intensity, and have a long service life. Fig. 1 shows an example of a one-end sealed halo/incandescent light bulb, in which four leads (J?) are attached to the crimp-sealed portion (2) of the envelope (l) so as to pass through the crimp-sealed portion (2).
43, 3 and 4, 4 are provided, and filament coils 5 and 6 are connected between the lead rods 3, 3 and between the lead rods 4, 4, respectively, within the envelope 1 to constitute a so-called lie/filament type incandescent light bulb. . 7 is the remainder of the exhaust pipe, and 8 is a fixing piece.

Conventionally, such an incandescent light bulb has an assembly 10 formed by connecting filament coils 5 and 6 to the tips of four leads h3, 3 and 4, 4, as shown in FIG.
3, 4, and 4 are held in one plane by a hole tube 11, the assembly 10 is inserted into a glass tube 13 provided with an exhaust pipe 12, and the open end 14 of the glass tube 13 is heated. As shown in FIG. 3 (6) and (b), the pressing surface 1 is parallel to the plane on which the lead rods 3.3 and 4, 4 are located.
0IJ movable jaw 17B by a fixed jaw 17A shouldering 6A and a pressing surface z6B (i = 1) which is parallel to the pressing surface 16A and an internal jaw 17B disposed so as to be able to move toward and away from the rectangular jaw t7A. ' is brought close to the fixed jaw +7A to clamp the open end 14?lI- of the glass tube 13 as shown in FIG.
It is manufactured by forming.

However, in the conventional incandescent light bulb obtained in this way, the shape of the lower end portion 19 is not the same because there is no part in the jaws 17A and 17B of the pinocher that restricts the lower end that goes down to the crimp S2. Not only does it become unsightly as it becomes rounded and irregular, but also the softened glass sag, so the length between the level of the filament coil 5 or 6 and the level of the outermost part of the crimp sealing part 2 is shortened. becomes larger as it becomes constant, and leads 3.3 and 4,4 become displaced in the plane direction where they are located due to the C bending of the glass compensated for by the compression surface due to the impact when crimping with pinchers. As shown in Figure 5, the envelope 1 is tilted with respect to l1qilX! ll
As a result, the filament/coils 5 and 6 are displaced.

For this reason, for example, when attaching the incandescent lamp to the concave reflector 20 through the cap 21 inserted into the crimp sealing part 2 as shown in Figure @6, the filament coil 5 or 6 is attached to the concave reflector 20. There is a possibility that the reflecting mirror 200 cannot be reliably positioned at the focal position.

The present invention has been made based on the above-mentioned circumstances, and its purpose is to break the unsightly crimp-sealed portion where the shape of the end portion is restricted, and to provide the lead rod parallel to the axis of the sealing body. The company provides incandescent light bulbs.

The inventive incandescent light bulb is characterized by an envelope, a crimp seal formed at the end of the envelope, and a lead rod that passes through the crimp seal in an airtight manner and extends to the outside. , a filament coil connected to the lead rod within the enclosure, a protrusion extending in the direction of the crimp is formed on the end face of the crimp-sealed part, and the lead rod protrudes outward from the protrusion. I'm sorry for the inconvenience.

An embodiment of the present invention will be described below by reference.

In one embodiment of the present invention, as shown in FIGS. 7 and 8, a lead) ru
: On the end surface 30 of the crimp sealing part 2 through which the crimp sealing parts 2 extend through, four protrusions 31 and 31 are formed extending in the thickness direction of the crimp sealing part 2, and r> An incandescent light bulb is configured such that the iJ lead rods 3, 3 and 4, 4 protrude to the outside through protrusions 31, 31.

Such an incandescent light bulb (can be manufactured as follows: 8g, 9). A bearing member 41 forming a bearing 40 extending forward along its entire length, that is, in the direction of the movable jaw 17B, is integrally fixed to the fixed jaw 17A. Four cutting grooves 42 extending to the pressing surface 16A in the moving direction of the driving jaw 17B.
42 and the lead rod 3.
It is formed to correspond to the positional relationship in which the numbers 3 and 4, 4 are lined up.

Using such a pinocher, the leads h3, 3 and 4,4 of the assembly 10 are connected to the fixed jaw 17A as shown in FIG.
The assembly 10 is held by the holder 11 in a state where it is inserted through the cut 9 grooves 42° 42 in the support member 41,
The glass tube 18 is placed, the open end thereof is heated, the movable tube 17B is brought close to the fixed tube 17A, and the glass tube 18 is pressed between the glass tube 18 and the fixed tube 17A, thereby forming the crimp-sealed portion 2. Thereafter, exhaust gas and filler gas are introduced through the exhaust pipe 12, and the exhaust pipe 12 is sealed off to obtain an incandescent light bulb.

In the incandescent light bulb obtained in the above manner, the water surface 4 is attached to the fixed show 17A of the pincher during the formation of the crimp sealing part 2.
Since the support member 41 forming the groove 4z is provided, the glass does not hang down freely but is regulated by the ice surface 40, and at the same time the glass hangs slightly into the groove 4z. As shown in FIG. 8, the crimp sealing part 2 is formed with a flat end surface 8o and protrusions 81 and 1 extending in the thickness direction, and the crimping sealing part 2 is formed with a flat end surface 8o and protrusions 81 and 1 extending in the thickness direction. Since the grooves 42 and 42 were inserted into the grooves 42 and 42, the grooves 42 and 42 were held so that they protruded outward from the protrusions 81 and 81. Moreover, when forming the crimp sealing part 2, each of the lead rods 8, 8 and 4, 4 is inserted into the cut groove 4z of the support member 41 fixed to the fixed show 17A, so that the flow of the glass is prevented. Lead rod 8. :U and 4,4
is prevented from being displaced along the plane in which it lies, so that each lead rod 3, 3 and 4.4 remains parallel to the axis X of the enclosure l. As a result of the above, the obtained incandescent lamp has an extremely beautiful appearance with the ends of the crimp-sealed part 2 having a rectangular parallelepiped shape, and the outermost end of the crimp-sealed part 2 from the level of the filament coil 5 or 6. The length e between the levels of the positions does not increase unexpectedly and is regulated to be approximately constant, and furthermore, the length e between the levels of the positions
is in the desired state with respect to the sealing body 1, so that the crimp sealing part 2
The external shape of the lamp and the positional relationship between the filament I and the coils 5 and 6 are always constant, and the work of assembling the incandescent lamp into a concave reflector etc. is reliable and easy, and the desired lighting effect can be reliably exerted. can.

To further explain the support member 41 mentioned above, the width D (see FIG. 11) and the height H (see FIG. 9 [0) of the cut groove 4z]
When the diameter of the lead rod is d, it is preferable that the following relationship is satisfied, and in this case, it is possible to reliably prevent the lead rod from tilting.

1 Furthermore, the cut groove 4z is formed on the support member 4 as shown in FIG.
It is preferable that the lead rod is widened at the front edge of the lead rod 1, since this makes it easier to insert the lead rod therethrough. This support member 41 may be fixed to the fixed show 17A with screws or the like;
It may be formed integrally with A.

In the present invention, the following first-order modification is possible.

1) The number of lead rods may be other than 4.

2) The seal may be of a both-end sealed type.

As described above, the present invention provides a sealing body, a crimp-sealing portion formed at the end of the sealing body, a lead rod extending outside through the crimp-sealing portion in an airtight manner, and a and a filament coil connected to a lead rod, a protrusion extending in the thickness direction is formed on the end face of the crimp-sealed part, and the lead rod protrudes outward from the protrusion. With this configuration, the crimp sealing part has a beautiful appearance and a regulated shape, and the filament coil is
[It is possible to easily manufacture a product with the following posture.]

[Brief explanation of drawings]

Fig. 1 is an explanatory front view of a one-end sealed incandescent light bulb, Figs. 2 and 4 are explanatory front views and vertical side views of the formation of a crimp-sealed portion, and Figs. 8 (a) and (b). ) are respectively a plan view and a front view of Pincher's show, Figure 5 is an explanatory front view of a conventional incandescent light bulb, Figure 6 is an explanatory diagram of an example of use of an incandescent light bulb, and Figure 7 is an incandescent light bulb of the present invention. An explanatory front view of the light bulb, FIG. 8 is an enlarged perspective view of the crimp sealing part, and FIG.
Figures (a) and (b) are a plan view and a front view, respectively, of the pincher used for manufacturing the inventive incandescent lamp, and Fig. 10 is a longitudinal cross-section for explaining the formation of the crimp sealing part of the inventive inventive incandescent lamp. The side view and FIG. 11 are explanatory enlarged plan views showing other examples of the support member. I-Pa sealing body 2...Crimp sealing part 3.4...
Lead h 5, 6...Filament coil 7.
...Exhaust pipe remaining part 1o...Assembly 11...Boulder 13...Glass tubes 17A, 17B...Jaws
20... Concave reflector L... Incandescent light bulb 3o
...End face 31...Protrusion 4o...End face 41...Supporting member 42...Multi-cut groove Figure 1, Figure 2, Science 4, Figure 3 (A) (0), 16B, 5 Figure]. 7z (A) 332- Figure 10 Figure 1I

Claims (1)

[Claims] 1) A sealing body, a crimp-sealing portion formed at the end of the sealing body, a lead rod extending to the outside through the crimp-sealing portion airtightly, and the IJ-do rod within the housing. a filament coil connected to the crimp-sealed portion, and a protrusion extending in the thickness direction is formed on the end face of the crimp-sealed portion;
An incandescent light bulb characterized in that the M mark protrudes outward from the protrusion.