JPS63314754A - Electric bulb with base - Google Patents

Abstract

PURPOSE:To accurately secure the positional relation between a glass bulb and a holding band, normalize the positional relation between the glass bulb and a base section, and hold the glass bulb reliably and easily by coupling the projection of a pinch seal section and the recess of the holding band. CONSTITUTION:The pinch seal section 3 of a glass bulb 2 is inserted into a space surrounded by holding pieces 15, 16 of a holding section 14 and a connecting piece and a short piece 18, with the holding pieces 15, 16 slightly expanded. It is inserted until the bulb 2 is brought into contact with the front end of a protruded section 22 so that the holding pieces 15, 16 are brought into contact with the seal section 3. A projection 11 on protruded faces 9, 10 formed on the seal section 3 is coupled with coupling holes 23, 24, 23', 24' formed on the protruded section 22 under this condition. Connecting pieces 19, 20 are then connected and fixed by welding or the like. As a result, the glass bulb 2 is reliably held with a holding band, with their positional relation kept correctly.

Description

[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 B0 Overview of the invention C0 Prior art 0 Problems to be solved by the invention E0 Means for solving the problems F. Example a Glass bulb [Figs. 1 to 4 ] b, Holding band [Figures 1 to 8] C1 Cap part [Figures 1 to 3] c-10 Cap body c-2, terminal piece c-3, metal sleeve d, metal sleeve of retaining band Attachment to G1 Effect of the invention (A, field of industrial application) The present invention relates to a novel light bulb with a base. Specifically, in a type of lamp with a base that connects the glass bulb and the base through a retaining band wrapped around the pinch seal part of the glass bulb, the positional relationship between the glass bulb and the retaining band is accurate, and the retaining band is ensure the retention of the glass bulb by the
To provide a novel light bulb with a base that prevents frequent breakage of the glass bulb.

(B. Summary of the Invention) The light bulb with a cap of the present invention has a cap that connects a glass bulb having a pinch seal portion having a substantially rectangular cross-sectional shape to the cap portion via a holding band wrapped around the pinch seal portion. In the attached light bulb, a plurality of protrusions are formed on the side surface of the pinch seal part, and the protrusions are engaged with the recesses formed in the holding band, and some of the protrusions and the recesses do not engage tightly. engage,
In other cases, the engagement is loose, thereby ensuring accurate positional relationship between the glass bulb and the holding band and ensuring that the holding band holds the glass bulb. This is to prevent parts from being damaged.

(C, Prior Art) Some bulbs with caps include those in which a glass bulb and a cap are connected via a holding band wrapped around a pinch seal portion of the glass bulb.

(D. Problem that the invention seeks to solve) However,
If the holding band is simply wrapped around the pinch seal part as in the case of conventional light bulbs with bases, the alignment between the pinch seal part and the holding band will be unstable, and the pinch seal part will not be fixed by the holding band. There is also the problem that retention is uncertain.

Therefore, the inventor considered forming a protrusion on the pinch seal portion and engaging this protrusion with a recess formed in the holding band.

However, if the protrusions and the recesses are engaged tightly, that is, without any gaps between them, some of the protrusions will break after long-term use. I realized that.

The present invention has been made to solve these problems.

(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 pinch seal portion that is approximately rectangular in cross section. A plurality of protrusions are formed, and a recess that engages with the protrusion is formed in the holding band wrapped around the pinch seal part, and the engagement between the protrusion and the recess is such that some of the protrusions are tightly engaged with each other. , and others, the glass bulb and the cap are connected via this holding band, which is loosely engaged.

Therefore, according to the present invention, the positional relationship between the glass bulb and the holding band is accurately determined by the engagement between the protrusion of the pinch seal part and the recessed part of the holding band.
All that is left to do is to align the holding band and the cap section, so that the positional relationship between the glass bulb and the cap section is in the normal state, and the glass bulb can be held securely easily. . In addition, since some of the protrusions and the recesses are engaged tightly and others are loosely engaged, accidents that break the protrusions during use almost never occur.

(F. Example) The details of the light bulb with base of the present invention will be described below according to the illustrated example.

The illustrated embodiment is an application of the present invention to a halogen light bulb 1.

(a, glass bulb) [Figures 1 to 4] 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 and 5b are external lead wires. And an internal lead wire 5a.

A filament 6 is stretched between the tips of 5a.

The pinch seal portion 3 has a generally rectangular cross-sectional shape and is generally flat as a whole, and protrusions 8, 8, 1, . . . are formed along both side edges of its wide side surface 7, 7'. ing.

Further, each of the two wide side surfaces 7.7' has two protrusions 9.9 slightly protruding from the side surfaces, and
10.10 are formed one by one, and each of these protrusions 9.9, . . . and 10.10 is formed with a small protrusion.

That is, a circular protrusion 11.11 that is one circle smaller than the protrusion 9.9 is formed on the protrusion 9.9 of one side face, and a circular protrusion 11.11 that is one circle smaller than the protrusion 10 is formed on the protrusion 10. A small oval protrusion 12 is formed. Further, the protrusion 9.9 on the other side surface 7' is formed with protrusions 11', 11' each having a circular shape smaller than the protrusion 9.9, and the protrusion 10 has an oval protrusion. 12' is formed.

Among these protrusions, the circular protrusions 11.11, 11', and 11' have the same diameter, for example, 2 mm, but the oval protrusions 12 and 12' have the same diameter. The sizes are different.

For example, these protrusions 12.12' both have a short axis of 2 m.
m, but the major axis of the protrusion 12 is 2,8 m.
A protrusion 12' with a thickness of 3.2 mm is formed at m.

(b, Holding band) [Figures 1 to 8] Reference numeral 13 is a holding band that holds the glass bulb 2 by winding the pinch seal portion 3 of the glass bulb 2. The holding band 13 has spring elasticity. It is formed by press-forming a single sheet metal material having the following properties.

Reference numeral 14 denotes a holding portion that is bent so as to have an approximately I-shape as a whole when viewed from the front and back direction, that is, a shape that matches the cross-sectional shape of the pinch seal portion 3. The holding portion 14 is composed of two sheets facing each other. A connecting piece 17 connecting one end of the holding piece 15.16 of the holding piece 15.16 and a connecting piece 17 that is bent at a right angle from the end of the holding piece 15 on the side opposite to the connecting piece 17 and facing the connecting piece 17. A connecting piece 19 extending from the opposite end of the connecting piece 17 of the short piece 18 and the other holding piece 16, and a connecting piece 20 that is bent outward from the tip of the short piece 18 at a substantially right angle and faces the connecting piece 19.
are integrally formed. And the holding piece 15.16
A protrusion 21, 22 is formed in which the intermediate portion in the longitudinal direction is protruded inwardly, and thereby,
The interval between the holding pieces 15 and 16 becomes narrower in the middle, and when the connecting pieces 19 and 20 are connected, the cross section of the pinch seal portion 3 is A space having a substantially square shape that conforms to the shape is formed.

23.23 and 24 are engagement holes formed in the protrusion 21, into which the protrusions 11.11 and 12 formed on one side 7 of the pinch seal portion 3 of the glass bulb 2 are engaged. It is something. That is, the protrusion 11.1 is located in the engagement hole 23.23.
1 is engaged, and the protrusion 12 is engaged with the engagement hole 24. These protrusions 11, 11, 12 and engagement holes 23, 23
．． 24 is tightly engaged. - That is, if the size of each protrusion 11, 11, 12 is the size example described above, the engagement hole 23, 23 is formed in a circular shape with a diameter of 2 mm, and the engagement hole 24 has a minor axis of 2 mm, It is formed into an oval shape with a major axis of 18 mm.

23', 23', and 24' are engagement holes formed in the protrusion 22, and the glass bulbs 2 are inserted into the engagement holes 23', 23'.
Projections 11', 11' formed on the other side surface 7' of the pinch seal portion 3 are engaged with the small stitch. That is, in the example of the dimensions described above, the protrusions 11', 11' are formed in a circular shape with a diameter of 2 mm+, whereas the engagement holes 23', 23' are formed in a circular shape with a diameter of 12 mm. Then, the protrusion 12' is tightly engaged with the remaining engagement hole 24'. That is, the protrusion 1
If the dimensions of 2' are as shown in the above example, the engagement hole 2
4' is formed into an oval shape with a short axis of 2 mm and a long axis of 3.2+nm.

Reference numerals 25 and 26 denote connection plates that extend from the rear end edges of the holding pieces 15 and 16 toward opposite sides, and have semicircular outer edges. Projections 27, 27, . . . projecting forward are formed in cut-and-raised shapes at the portions of the connecting plates 25 and 26 near the outer edges and both ends thereof.

27a, 27a, ... are projecting pieces 27.27, ...
This is a hole formed by cutting and raising the hole. Also, the outer edges of each coupling plate 25, 26 are bent slightly rearward.

The holding band 13 configured in this manner is wrapped around the pinch seal portion 3 of the glass bulb 2 in the following manner.

That is, the pinch seal part 3 of the glass bulb 2 is inserted into the space surrounded by the holding pieces 15, 16, the connecting piece 17, and the short piece 18 of the holding part 14, with the holding pieces 15 and 16 slightly expanded. This insertion is carried out until the glass bulb 2 abuts the front end of the projection 21.22, and then the retaining pieces 15 and 16 come into contact with the pinch seal 3). In this state, the engagement hole 23.23.24 formed in the protrusion 21.22
and the protrusions 11 on the pinch seal portion 3 formed at 23', 23', 24', and 10.10.
．． 11.12 and 11', 11', 12' are engaged. Then, the connecting pieces 19 and 20 are connected and fixed by spot welding or the like. Incidentally, when spot welding the connecting pieces 19 and 20, the protrusion 28 formed on the connecting piece 20 melts quickly to ensure spot welding.

In addition, 29, 29, . . . are notches formed at both ends of the holding pieces 15, 16, which facilitate the bending of the holding part 14 and also allow the holding part 14 to be attached to the pinch seal part 3. It works to improve familiarity.

As a result, the glass bulbs 2 are securely held by the holding band 13 in a correct positional relationship. Note that the dimensions of the oval protrusions 12.12' formed on each side surface 7.7' of the pinch seal portion 3 are different, and the holding band 13 is formed in correspondence with these protrusions 12.12'. Since the dimensions of the engagement holes 24, 24' correspond to the respective protrusions 12, 12', the glass bulb 2 is always oriented correctly with respect to the holding band 13 when the glass bulb 2 is attached to the holding band. It will be held at 13.

(c, cap part) [Figs. 1 to 3] Reference numeral 30 denotes a cap part, which consists of a cap body, a terminal piece, and a metal sleeve.

(c-1, Base Body) 31 is a base body, which is molded from a thermoplastic synthetic resin.

This cap body 31 has a substantially cylindrical shape, and a partition wall 32 provided at an intermediate portion defines a glass bulb holding portion 33 inside the cap body 31.
and a connector part 34. Terminal mounting holes 35.35 are formed in the partition wall 32. Further, a flange 36 projecting outward is integrally formed on the outer peripheral surface of the base body 31, and three positioning notches 37, 37, 37 (
In the drawing, only two are shown. , ) are formed.

Reference numeral 38 denotes an annular fitting groove formed on the outer peripheral surface of the base body 31 at a position forward of the flange 36, and an O-ring-shaped sealing material 39 is fitted and attached to the fitting groove 38. ,
Base part 5 when this light bulb is attached to the lamp body
This contributes to waterproofing between the body 31 and the lamp body.

(c-2, terminal piece) 40.40 is a terminal piece disposed within the connector portion 34 of the base body 31.

The terminal piece 40 has an abbreviated shape, and a tube-shaped portion 42 is integrally formed on a mounting piece 41 at the base.

Thus, the cylindrical portion 42.42 of the terminal piece 40.40 is connected to the terminal attachment hole 35.35 formed in the partition wall 32 of the base body 31.
The terminal piece 40.40 is inserted through the connector portion 34 side from the connector portion 34 side, and is supported by the partition wall 32 by caulking the portion of the cylindrical portion 42.42 that protrudes toward the glass bulb holding portion 33 side.

43.43 is a connecting line, and the base end is a terminal piece 40140
It is inserted into the cylindrical part 42.42 of the glass bulb and fixed to the mounting piece 41.41 by soldering, and the front end slightly protrudes from the front end of the glass bulb holding part 33.

(c-3, metal sleeve) 44 is a metal sleeve. The metal sleeve 44 is formed by curling a metal strip, and the abutting portions of both ends thereof are folded back to the sides where they contact each other, and the folded pieces 4 of each
5.45' is caulked from the inside and outside directions in the engaged state to form a cylindrical shape. A protrusion 46 extending in the axial direction is formed to protrude outside the caulked portion.

This metal sleeve 44 has an outer diameter that allows it to fit inside the glass bulb holding portion 33 of the base body 31, and several holes 47, 47, 47 are formed in its side wall.

48, 48, . . . are band attachment pieces provided to protrude forward from the front end edge of the metal sleeve 44, and these band attachment pieces 48, 48, . , ... are located closer to the axis of the metal sleeve 44, and holes 27a, 27a, formed in the connecting plate 25, 26 of the holding band 13.
. . . The rear portion from the middle portion is inclined so as to be positioned correspondingly to each other.

Reference numerals 50 and 50 denote projecting pieces that protrude forward from positions 180° apart from each other at the front end of the metal sleeve 44, and are used by hand or with a jig when inserting the metal sleeve 44 into the glass bulb holding portion 33 of the cap body 31. This is to make it easier to hold.

Note that the length of this metal sleeve 44 is slightly shorter than the length of the glass bulb holding portion 33 of the base body 31. Also,
Band mounting piece 48.48. Front end 49.4 of...
9, . . . are projecting pieces 27.2 formed on the holding band 13.
7, . . . are oriented parallel to the corresponding ones.

Therefore, the metal sleeve 44 as described above is attached to the base body 31.
The metal sleeve 44 is fitted into the glass bulb holding part 33 of the metal sleeve 44, and in that state, the vicinity of the middle part of the metal sleeve 44 is heated by ultrasonic waves. At this time, the protrusion 46 formed on the metal sleeve 44 engages with the grooved line 51 formed to extend in the axial direction on the inner surface of the glass bulb holding part 33 of the metal sleeve 44 , and 31 is positioned. When the cap body 31 and the metal sleeve 44 are ultrasonically heated, the metal sleeve 4
4 and the inner surface of the glass bulb holder 33 , the inner surface of the glass bulb holder 33 melts, and the molten synthetic resin material flows through the hole 47 formed in the side surface of the metal sleeve 44 . .47.47, thereby preventing the metal sleeve 44 from falling off the glass bulb holder 33'. In this way, the base body 31
and metal sleeve 44 are combined.

(d. Attaching the holding band to the metal sleeve) Then, the holding band 13 is attached to the metal sleeve 44 while holding the glass bulb 2 in the following manner.

That is, the band attachment pieces 48, 48 of the metal sleeve 44,
The front ends 49.49, . . . are inserted into the holes 27 a, 27 a, .・・・
Adjust the positional relationship between the filament 6 of the glass bulb 2 and the flange 36 of the cap body 31 to be correct by sliding it against the
Front end portion 49.49 of band attachment piece 48.48,...
... and the projecting pieces 27, 27, ... of the holding band 13 are fixed by plasma arc welding or the like.

As a result, the glass bulb 2 is held in the base body 31 via the holding band 13 and the metal sleeve 44.

The external lead wires 5b, 5b protruding from the rear end of the pinch seal portion 3 of the glass bulb 2 are welded to the tips of the connecting wires 43.43, thereby connecting the lead wires 5.5 and the terminal piece 4.
0.40 are concatenated.

The C halogen light bulb 1 is formed as described above.

(G. Effects of the Invention) As is clear from the above description, the light bulb with a base of the present invention has a holder wrapped around a pinch seal portion of a glass bulb having a pinch seal portion having a substantially rectangular cross-sectional shape. A light bulb with a cap that connects a glass bulb and a cap via a band, wherein a plurality of protrusions are formed on the side surface of a pinch seal portion of the glass bulb, and the protrusions are engaged with a recess formed in a holding band. However, the engagement between the protrusions and the recesses is characterized in that some of the protrusions and the recesses are tightly engaged, while others are loosely engaged.

Therefore, according to the present invention, the positional relationship between the glass bulb and the holding band is accurately determined by the engagement between the protrusion of the pinch seal part and the recessed part of the holding band.
All that is left to do is to align the holding band and the cap to ensure the proper positional relationship between the glass bulb and the cap, and to easily hold the glass bulb securely. . In addition, since some of the protrusions and the recesses are engaged tightly and others are loosely engaged, accidents that break the protrusions during use almost never occur.

In each of the embodiments described above, all the recesses formed in the holding band are configured as engagement holes, but this makes it easier to form the holding band and improves accuracy. However, it goes without saying that the recess is not a through hole such as an engagement hole, but may be a recess with one side closed.

[Brief explanation of the drawing]

The drawings show an example of an embodiment in which the light bulb with a base of the present invention is applied to a halogen light bulb. Figure 1 is an exploded perspective view, Figure 2 is a horizontal sectional view, and Figure 3 is a view taken along line III-III in Figure 2. 4 is an enlarged exploded perspective view of the glass bulb and retaining band seen from the opposite side from FIG. 1, FIGS. 5 and 8 show the retaining band, and FIG. 6 is a side view on the opposite side of FIG. 5, FIG. 7 is a front view, and FIG. 8 is a sectional view taken along the line ■-■ in FIG. 5. Explanation of symbols 1...Light bulb with base, 2...Glass bulb, 3...
Pinch seal portion, 11.12.12'...Tightly engaged protrusion, 11', 11'...Loosely engaged protrusion, 13...Retaining band, 23.23', 24.24 '...Concavity, 30...Side view of the mouthpiece Fig. 5 Fig. 6 Fig. 7 Cross-sectional view (Xl-1 line) Fig. 8

Claims (1)

[Claims] (1) A light bulb with a cap that connects a glass bulb and a cap via a holding band wrapped around the pinch seal of a glass bulb having a pinch seal that is approximately rectangular in cross section, the glass bulb having a pinch seal that is approximately rectangular in cross section; A plurality of protrusions are formed on the side surface of the pinch seal portion, and the protrusions are engaged with recesses formed in the holding band, and the engagement between the protrusions and the recesses is such that some of the protrusions are tightly engaged with each other. , and other types of light bulbs with caps characterized by loose engagement.