JPH0427092Y2 - - Google Patents

Description

[Detailed explanation of the idea] The light bulb of the present invention will be explained according to the following items.

A. Field of industrial application B. Overview of the invention C. Prior art [Figs. 7 to 9] D. Problems to be solved by the invention [Figs. 7 to 9] E. Means for solving the problems F Examples [Figs. 1 to 6] a Glass bulb [Figs. 1 to 6] b External lead wires [Figs. 1 to 3, 6
] c Base part [Figures 4 to 6] c-1 Base plate [Figures 4 to 6] c-2 Base body [Figures 4 to 6] c-3 Metal sleeve [Figure 4] Figures to Figures 6] d Attachment of base plate to metal sleeve e Terminal [Figure 6] G Effects of the invention (A Field of industrial application) The present invention relates to a novel light bulb. Specifically, the type that has two filaments inside the glass bulb.
That is, regarding double filament type light bulbs,
To provide a new light bulb which ensures a reliable connection between a lead wire protruding from a glass bulb and an external lead wire, and prevents accidental contact between the external lead wires.

(B Overview of the invention) In the light bulb of this invention, each connection end of the two filaments is connected to each inner end of each of the four lead wires that pass through the seal part at one end of the glass bulb in a straight line. This is a light bulb in which the outer ends of the lead wires are distributed and connected to three external lead wires, and the connecting portion of the two external lead wires, whose connecting ends are bent in an L shape, is connected to the glass bulb. The ends of the lead wires are slightly shifted in the axial direction, and the ends thereof are positioned so as to extend substantially along the arrangement direction of the lead wires, and the connecting portion of the remaining straight external lead wires is connected to the two It is located at a slight distance in the direction perpendicular to the arrangement direction of the lead wires and the axial direction of the glass bulb from the position where the ends of the connection parts of the external lead wires are facing each other, and is separately connected to one connection end of the two filaments mentioned above. Connect the two connected lead wires to the connection part of one of the L-shaped external lead wires, and connect the two lead wires separately connected to the other connection end of the filament to the other L-shaped external lead wire.
The outer end of the lead wire connected to the straight external lead wire is bent into a substantially L shape, and the tip of the lead wire is connected to the connecting portion of the straight external lead wire, thereby ensuring that the outer end of each lead wire is connected to the connecting portion of the external lead wire;
This prevents accidents where external lead wires come into contact with each other.

(C. Prior Art) [Figs. 7 to 9] Connections between lead wires and external lead wires in conventional double filament type light bulbs are as shown in Figs. 7 to 9.

That is, a is a glass bulb, and four lead wires c ₁ from the rear end of a seal part b formed at one end of the glass bulb,
c ₂ , c ₃ , and c ₄ are prominent. These lead wires c ₁ to c ₄ are arranged substantially in a straight line when viewed from the front and rear directions. Two filaments (not shown) are arranged inside the glass bulb a, and the inner ends of the lead wires c ₁ and c ₂ are individually connected to one connection end of the two filaments. , lead wires c ₃ and c ₄ are respectively connected to the other connecting ends of the two filaments. Also, the part of one of them c ₃ located outside the glass bulb a is bent from its base, that is, the part in contact with the rear end of the seal part b, and its outer end is connected to the lead wires c ₁ to c ₄ The seal portions b are spaced apart in a direction perpendicular to the arrangement direction y-y.

d, d' and e are external lead wires, the tips of d and d' are bent into an L-shape, and the wire e is formed into a straight line.

A connecting part f of the L-shaped external lead wires d and d' extending in a direction perpendicular to the axial direction x-x of the glass bulb a,
f′ extends along the arrangement direction of the lead wires c ₁ to c ₄ at the sealing part b, and
are arranged at _{approximately} the same _position in the axial _direction is connected.

The tip of the straight external lead wire e is arranged in the arrangement direction y-y and the axial direction
They are located slightly apart in the direction z-z perpendicular to x. The remaining lead wire _c3 is connected to the tip of this linear external lead wire e.

(Problems to be solved by the D idea) [Figures 7 to 9] However, in the case of the above-mentioned conventional light bulbs, first, the connection between the lead wire and the external lead wire, especially the straight external lead wire, is difficult. The problem is that it is uncertain.

Lead wire c ₃ connected to straight external lead wire e
The portion protruding from the seal portion is bent at its base and extends obliquely toward the rear. Therefore,
A slight deviation in the bending angle α causes a large change in the position of the tip of the lead wire c ₃ with respect to the straight external lead wire e. Furthermore, even if the material is bent to a predetermined angle using a jig, the final bending angle will vary greatly due to spring back. Therefore, in the case of the above-mentioned conventional light bulb, the connection point between the lead wire _c3 and the straight external lead wire e is not constant and varies greatly, and this causes the position of the connection with the spot welding electrode to vary. Due to reasons such as destabilizing the relationship,
This may cause welding defects.

In addition, the connection part f of the L-shaped external lead wires d and d',
Since the tips of f' are located extremely close to each other, there is a risk of short circuiting each other, which will significantly impede the reliability of the product.

(Means for Solving Problem E) In order to solve the above-mentioned problems, the light bulb of the present invention has four lead wires that pass through the seal part at one end of the glass bulb in a straight line. 2 on each inner edge
Each connection end of the two filaments is connected separately,
A light bulb in which the outer ends of the lead wires are distributed and connected to three external lead wires, and the connecting ends of the two external lead wires are bent in an L shape, and the connecting portion of the two external lead wires is in the axial direction of the glass bulb. The connecting portions of the remaining linear external lead wires are positioned so as to extend substantially along the arrangement direction of the lead wires with their tips slightly spaced apart from each other, and the connecting portions of the remaining linear external lead wires are connected to the two external leads. The terminals are located at a slight distance in the direction perpendicular to the arrangement direction of the lead wires and the axial direction of the glass bulb from the position where the ends of the connecting parts of the wires face each other, and are connected to one connecting end of the two filaments respectively. Connect the two lead wires to the connection part of one of the L-shaped external lead wires, and connect the two lead wires separately connected to the other connection end of the filament to the other L-shaped external lead. The outer end of the lead wire connected to the straight external lead wire is bent into a substantially L shape, and the tip is connected to the straight external lead wire. It is connected to the connection part of the line.

Therefore, according to the light bulb of the present invention, since the outer end of the lead wire connected to the straight external lead wire is bent into a substantially L-shape, the portion connected to the straight external lead wire is connected to the straight external lead wire. It extends in a direction substantially perpendicular to the lead wire, and its position in the front-rear direction with respect to the linear external lead wire, that is, in the axial direction of the glass bulb, is substantially constant. Therefore, the connection between the lead wire and the straight external lead wire by spot welding or the like can be made very reliably.

Furthermore, although the tips of the connecting parts of the L-shaped external lead wires are close to each other in the direction in which the lead wires are arranged, they are spaced apart in the axial direction of the glass bulb, making it difficult for them to contact each other. To effectively prevent short-circuit accidents between two external lead wires.

(Embodiment F) [Figs. 1 to 6] Details of the light bulb of the present invention will be explained below according to the illustrated embodiment.

1 is a halogen light bulb.

(a Glass bulb) [Figures 1 to 6] 2 is a glass bulb of the halogen light bulb 1. The glass bulb 2 has a rear end (the upward direction in FIG. 1 is the front, and the downward direction is the rear. In the following explanation, directions will be referred to in this direction) at the pinch seal portion. 3, it is a glass bulb whose front end is closed with an exhaust part 4 to make it airtight.

5, 5, . . . are lead wires that pass through the pinch seal portion 3 and have intermediate portions held by the pinch seal portion 3. In addition, this lead wire 5, 5,...
is made of molybdenum wire, for example.

Reference numerals 6 and 6 denote glass bridges, which are welded within the glass bulb 2 so as to sandwich the lead wires 5, 5, . . . from both sides. Further, filaments 7, 7 are stretched between the inner ends of the lead wires 5, 5, .
That is, the connecting ends 7 1 ′, 7 _{1 ′} of the filament 7 ₁ are connected to the lead wires 5 ₁ , 5 ₃ , and the lead wires 5 ₂ ,
Connecting ends 7 ₂ ′, 7 ₂ ′ of the filament 7 ₂ are connected to 5 ₄ .

The pinch seal portion 3 has a substantially flat shape, and has protrusions 8 on both sides on both sides in the width direction.
8, . . . are formed, and the cross-sectional shape is approximately I-shaped. Furthermore, engaging protrusions 9 are formed at positions near the lower end of both sides of the pinch seal portion 3 .

Incidentally, the glass bulb 2 is filled with an inert gas and a suitable halogen.

The arrangement directions y-y of the portions 5a ₁ , 5a ₂ , 5a ₃ , 5a ₄ of the lead wires 5 ₁ to 5 ₄ protruding from the rear end of the pinch seal portion 3 are substantially in a straight line, and the glass bulb 2 It intersects approximately perpendicularly to the axial direction xx. The protruding lead wires 5a ₁ , 5 a ₂ , and 5 a ₄ extend straight so as to extend parallel to the axial direction x-x, but the protruding lead wire 5 a ₃ has a rear end approximately L.
An end portion 10 is formed which is bent into a letter shape and extends substantially perpendicularly to the arrangement direction y-y and the axial direction xx.

(b external lead wire) [Figures 1 to 3, 6
Figure] 11, 12 and 13 are external lead wires.

The external lead wires 11 and 12 are L-shaped external lead wires whose tips are bent into an L-shape and have connecting portions 11a and 12a extending substantially parallel to the arrangement direction y-y.

These external lead wires 11 and 12 are oriented so that the tips of their connecting portions 11a and 12a face each other with a slight distance in the arrangement direction y-y, and in the axial direction x-x of the glass bulb 2. They are arranged in a slightly shifted manner.

Then, the connection portion 11 of the L-shaped external lead wire 11
The protruding parts 5a ₁ and 5a ₂ of the lead wires 5 ₁ and 5 ₂ are connected to the L-shaped external lead wire 1 by spot welding.
The protruding portion 5a4 of the lead wire ₅₄ is also connected to the connecting portion 12a of the lead wire ₅₄ by spot welding.

The distal end 13a of the straight external lead wire 13 is arranged in the arrangement direction y-y from the position where the distal ends of the connecting parts 11a and 12a of the external lead wires 11 and 12 are facing each other.
and is located at a distance in the direction z-z perpendicular to the axial direction xx, and the end 10 of the protrusion 5a ₃ of the lead wire 5 ₃ is connected to this tip 13a by spot welding. ing.

(C cap part) [FIGS. 4 to 6] 14 is a cap part that holds the glass bulb 2. The cap part 14 is attached to a cap plate that holds the glass bulb 2 with the pinch seal part 3, a cap body supported by a lamp body of a predetermined headlamp, and the cap plate is fixed. It consists of a metal sleeve. (c-1 Cap Plate) [Figures 4 to 6] 15 is a cap plate.

The cap plate 15 is made of a metal plate having spring elasticity, and has a substantially circular planar shape.

A short cylindrical ring portion 16 is formed from the periphery of the base plate 15.

Two pairs of intermediate holding pieces 18, 18, 18', 18' and two pairs of side holding pieces 19, 19, 19', 19' are formed in a cut and raised shape on the holding surface 17 of the cap plate 15. . intermediate holding pieces 18, 18 and 18',
18' are formed to face each other, are bent rearward from the holding surface 17, and are inclined so that the rear ends 20, 20 and 20', 20' approach each other. Side holding piece 19,1
9 and 19', 19' are formed to face each other, and are directed forward from the holding surface 17 and from the front end 2.
1, 21 and 21', 21' are inclined and bent so as to approach each other. And these presser pieces 18, 18, 18', 18', 19, 19,
Between each of 19' and 19', there are slits 22, 22, 2 to give more elasticity to these holding pieces.
2 and 22', 22', 22' are formed.

In addition, the side holding pieces 19, 19 and 19', 1
Spaces 23, 23 are formed outside 9',
By connecting these spaces 23, 23 with the spaces formed by forming each of the holding pieces, the shape roughly corresponds to the cross-sectional shape of the pinch seal portion 3 of the glass bulb 2 when viewed from above. An I-shaped space is formed.

Therefore, the glass bulb 2 has its pinch seal portion 3
are the presser pieces 18 and 1 of the cap plate 15 from above.
8', 18 and 18', 19 and 19', and 19 and 19', the front ends 21, 21, 21', 21' of the presser pieces 19, 19, 19', 19' are located behind the glass bulb 2. It is inserted until it touches the end. In this state, the intermediate holding pieces 18, 18, 18', 18' are attached to the rear end 2.
0, 20, 20', and 20' are in elastic contact with the sides of the intermediate portion of the pinch seal portion 3 of the glass bulb 2 from both sides behind the holding surface 17. At this time, the side holding pieces 19,1
The outer side edges of 9, 19', 19' are brought into contact with the mutually opposing side surfaces of the protrusions 8, 8, . . . of the pinch seal portion 3. In addition, the intermediate presser piece 18,1
8, 18', 18' rear end 20, 20, 20', 2
0' engages with the front surfaces of engaging protrusions 9, 9 formed on the side surfaces of the pinch seal portion 3, thereby preventing the glass bulb 2 from coming off from the cap plate 15.

(c-2 Base Body) [Figures 4 to 6] Reference numeral 24 denotes a base body, which is molded from thermoplastic synthetic resin.

The cap body 24 has a substantially cylindrical shape, and its interior is divided into a glass bulb holding part 26 and a connector part 27 by a partition wall 25 provided in the middle. Terminal mounting holes 2 are provided in the partition wall 25.
8, 28, 28 are formed. Further, a flange 29 projecting outward is integrally formed on the outer peripheral surface of the cap body 24.
There are three positioning notches 30, 3 on the outer peripheral edge of 9.
0,30 (only two are shown in the drawing).

31 is an annular fitting groove formed on the outer peripheral surface of the base body 24 at a position forward of the flange 29;
An O-ring-shaped sealing material is fitted into the fitting groove 31 and contributes to waterproofing between the base body 24 and the lamp body when the light bulb is attached to the lamp body.

Note that a predetermined terminal is provided inside the cap body 24, which will be described later.

(c-3 metal sleeve) [Figures 4 to 6] 32 is a metal sleeve.

The metal sleeve 32 has an outer diameter that allows the glass bulb holding portion 26 of the cap body 24 to fit therein, and an inner diameter that allows the annular portion 16 of the cap plate 15 to fit therein. Then, the metal sleeve 32
Several, for example, 6 to 8 small protrusions 33, 33, .

The metal sleeve 32 is connected to the base body 2.
It is fitted inside and fixed to the glass bulb holding portion 26 of No. 4.

(d Attachment of the cap plate to the metal sleeve) After the above-described cap plate 15 has been adjusted in position relative to the cap body 24 while holding the glass bulb 2, it is attached to the metal sleeve 32 fixed to the cap body 24. It will be done.

That is, the annular portion 16 of the base plate 15 is fitted into the metal sleeve 32 fixed to the base body 24 . Then, the annular portion 16 is slid against the metal sleeve 32 to adjust the positional relationship between the flange 29 of the cap body 24 and the filaments 7 ₁ and 7 ₂ of the glass bulb 2 to be correct, and the filament 7
When the positional relationship between ₁ and 7 ₂ and the flange 29 is correct, the projecting pieces 33 of the metal sleeve 32,
33, . . . and the annular portion 16 of the base plate 15 are fixed by spot welding.

In addition, this metal sleeve 32 and the cap plate 15
The fixing between them is not limited to spot welding, but may be done by other fixing means, such as soldering. In the case of soldering, the protrusions 33, 33, . . . for spot welding are not required.

(e Terminal) [Fig. 6] Reference numerals 34, 34, and 34 are terminals disposed within the connector portion 27 of the base body 24. Each terminal 3
4 has a mounting piece 35 bent at right angles to the main part at its base end, and a cylindrical part 36 protruding toward the opposite side of the main part is formed on the mounting piece 35.

Therefore, the mounting pieces 3 of the terminals 34, 34, 34
Cylindrical portions 36, 36, 3 formed in 5, 35, 35
6 is inserted into the terminal mounting holes 28, 28, 28 formed in the partition wall 25 of the cap body 24 from the connector part 27 side, and the tip of each cylinder part 36, 36, 36 protrudes toward the glass bulb holding part 26 side. Caulk the part,
This allows the terminals 34, 34, 34 to connect to the base body 2.
4 is placed in the connector section 27 of No. 4.

The rear ends of the external lead wires 11, 12, 13 are inserted into the cylindrical portions 36, 36, 36 of the corresponding terminals 34, 34, 34, respectively, and then the terminals 3
37, 37, 37 are soldered to the mounting pieces 35, 35, 35 of 4, 34, 34.

(Effects of the G design) As is clear from the above description, the light bulb of the present invention has four lead wires arranged substantially in a line passing through a seal formed at one end of the glass bulb. The connecting ends of the two filaments are connected to each inner end of the lead wire, and the connecting ends of the two external lead wires, each of which is bent in an L-shape, are slightly misaligned in the axial direction of the glass bulb. The connecting portion of the other linear external lead wire is connected to the two external lead wires in a state where the ends thereof are slightly spaced apart from each other so as to extend substantially along the arrangement direction of the lead wires. The two filaments are located a little apart in the direction orthogonal to the arrangement direction of the lead wires and the axial direction of the glass bulb from the opposing positions of the ends of the connection parts of the two filaments, and are respectively connected to one connection end of the two filaments. Lead,
That is, a common lead wire is connected to the connection portion of one of the L-shaped external lead wires, and two lead wires are each connected to the other connection end of the filament,
That is, the power supply lead wire is connected separately to the connection part of the other L-shaped external lead wire and the connection part of the straight external lead wire, and the outer end of the power supply lead wire connected to the straight external lead wire is approximately L-shaped. It is characterized in that it is bent into a letter shape, and its tip is connected to the connection part of the straight external lead wire.

Therefore, according to the light bulb of the present invention, since the outer end of the lead wire connected to the straight external lead wire is bent into a substantially L shape, the portion connected to the straight external lead wire is bent into a straight external lead wire. It extends in a direction substantially perpendicular to the lead wire, and its position in the front-rear direction with respect to the linear external lead wire, that is, in the axial direction of the glass bulb, is substantially constant. Therefore, the connection between the lead wire and the straight external lead wire by spot welding or the like can be made very reliably.

Furthermore, although the tips of the connecting parts of the L-shaped external lead wires are close to each other in the direction in which the lead wires are arranged, they are spaced apart in the axial direction of the glass bulb, making it difficult for them to contact each other. To effectively prevent short-circuit accidents between two external lead wires.

[Brief explanation of the drawing]

Figures 1 to 6 show an example of the implementation of the light bulb of the present invention. Figures 1 to 3 show the glass bulb and external lead wires, Figure 1 is a side view of the glass bulb, and Figure 2 is a side view of the glass bulb. is a plan view of the glass bulb, FIG. 3 is an enlarged rear view of the glass bulb, FIGS. 4 to 6 show the whole, and FIG.
The figure is an exploded perspective view, FIG. 5 is a perspective view, FIG. 6 is a vertical sectional view, FIGS. 7 to 9 show an example of the glass bulb and external lead wire of a conventional light bulb, and FIG. 7 is a side view. , FIG. 8 is a plan view, and FIG. 9 is an enlarged rear view. Explanation of symbols, 1...Light bulb, 2...Glass bulb, 3
... Seal part, 5 ₁ to 5 ₄ ... Lead wire, 7 ₁ , ₂
...Filament, 7' ₁ , ₂ ...Filament connection end, 10...Outer end of lead wire 53, ₁₁ , 12...
...L-shaped external lead wire, 11a, 12a...connection section, 13...straight external lead wire, 13a...connection section.

Claims (1)

[Claims for Utility Model Registration] Four lead wires are arranged substantially in a line passing through a seal formed at one end of the glass bulb, and each connection end of two filaments is attached to each inner end of the lead wire. are connected separately, and the connection parts of the two external lead wires, each of which has an L-shaped connection end, are slightly shifted in the axial direction of the glass bulb, and their tips are slightly spaced apart from each other. The connecting portion of another linear external lead wire is positioned so as to extend substantially along the arrangement direction of the lead wires, and the connection portion of the other linear external lead wire extends from the opposing position of the ends of the connecting portions of the two external lead wires in the lead wire arrangement direction. and two lead wires, i.e., a common lead wire, located slightly apart from each other in a direction perpendicular to the axial direction of the glass bulb and connected to one connection end of the two filaments, i.e., a common lead wire, to the outside of the L-shape. Connect two lead wires that are connected to the connection of one of the lead wires and separately connected to the other connection end of the filament, that is, the power supply lead wire to the connection of the other L-shaped external lead wire and the straight type. The outer end of the power supply lead wire that is connected to the connection part of the external lead wire separately is bent into an approximately L shape, and its tip is connected to the connection part of the straight type external lead wire. A light bulb characterized by: