JPH0677149U - Filament assembly - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide a filament assembly in which the long and short two internal lead-in wires and the supporter do not rotate even when force is applied from the outside in various steps. is there. [Structure] The filament assembly is composed of two long and short internal lead-in wires 1 and 2, a supporter 3, and a glass bridge 4. Then, two long and short internal lead-in wires 1, 2,
Also, the supporter 3 is bent at the points embedded in the glass bridge 4 at bending points a, b, and c. Furthermore, when each bending angle is α, β, γ,
All of α, β, and γ are 160 ° or less.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a filament assembly in a single-ended incandescent light bulb, in which two long and short internal lead-in wires for supporting a filament and a supporter are embedded by a glass bridge so as to be separated from each other.

[0002]

[Prior art]

 Generally, a filament assembly for supporting a filament of a single-ended incandescent light bulb is constructed by assembling metal wires such as molybdenum and tungsten. Specifically, a metal wire such as molybdenum or tungsten is transformed into two long and short internal lead wires and a supporter. Then, they are electrically insulated from each other and embedded in a glass bridge in a so-called separated manner.

However, an excessive force is externally applied to the filament assembly during the operation of connecting the filament assembly to the filament assembly or when the filament assembly in which the filament is connected is incorporated into the valve. If added, the internal lead-in wire and supporters will rotate. As a result, the axis of the splicing portion is displaced, and when the filament is spliced to this filament assembly, there is a problem that the shape of the filament is deteriorated, that is, the axis of the filament is displaced.

In order to prevent the rotation of the internal lead-in wire and the supporter, conventionally, empirically, two long and short internal lead-in wires and the supporter were bent to some extent, and the bent portion was embedded in a glass bridge.

As another method, as shown in Japanese Utility Model Application Laid-Open No. 54-116977, there has been a technique in which a part of an internal lead-in wire and a supporter buried in a glass bridge is devised. Hereinafter, description will be made with reference to FIG. The longer internal lead-in wire 5, the shorter internal lead-in wire 6 and the supporter 7 are partially embedded in the glass bridge 8 while being separated from each other. Then, in the two long and short internal lead-in wires 5, 6 and the supporter 7, the outer peripheral surface of the portion embedded in the glass bridge 8 is partially deleted to form fitting recesses 51, 61, 71. Furthermore, the surface of this fitting recess is made rough so that it is firmly embedded in the glass bridge 8. As a result, rotation of the long and short internal lead wires and supporters embedded in the glass bridge is prevented.

[0006]

[Problems to be solved by the device]

 However, in the method of bending the long and short two internal lead wires and the supporter to some extent and embedding the bent portion in the glass bridge, the bending angle was not clear. Therefore, a filament assembly in which the internal lead-in wire and the supporter rotate often occurred.

In addition, it is said that deleting two long and short internal lead wires and a part of the supporter to change the cross-sectional shape and further processing the surface into a rough surface increases the number of working steps and increases the cost. There was a problem.

The present invention has been made to solve the above problems, and its purpose is to connect filaments to a filament assembly or to connect filaments to which filaments are connected. It is an object of the present invention to provide a filament assembly that prevents rotation of an internal lead-in wire or a supporter that occurs when an excessive force is applied to the filament assembly from the outside when the solid body is incorporated into the valve.

[0009]

[Means for Solving the Problems]

 The filament assembly of the present invention comprises a long internal lead wire for connecting the filament, a short internal lead wire for connecting the filament, a supporter for supporting the filament, and the long and short two wires. In a filament assembly comprising an internal lead-in wire and a glass bridge for fixing a supporter, the long internal lead-in wire is bent in the direction of the central axis of the glass bridge so that the apex of the bending point is increased, The internal introduction line is bent such that the apex of the bending point is in a direction opposite to the bending point of the long internal introduction line, and the supporter is apex of the bending point in a direction opposite to the bending point of the long internal introduction line. And the bending points formed on the supporter are embedded in the glass bridge. When the bending angle of the long internal introduction line is α, α ≦ 160 ° When the bending angle of the short internal introduction line is β, β ≦ 160 ° When the bending angle of the supporter is γ, γ ≦ 160 It is characterized by being set to the value specified in °.

[0010]

[Action]

 In this filament assembly, two long and short internal lead wires and a supporter are embedded in a glass bridge. The two long and short internal lead wires and the supporter are bent at an angle of 160 ° or less at the portion embedded in the glass bridge. Therefore, the filament assembly has a structure in which the long and short two internal lead wires and the supporter do not rotate even when an excessive force is applied to the filament assembly from the outside in various processes.

[0011]

【Example】

 Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 shows an embodiment of a filament assembly according to the present invention. The two long and short internal lead-in wires 1 and 2 and the supporter 3 are embedded in the glass bridge 4 while being separated from each other. And, the long internal lead-in wire 1 forms a tightly wound joint portion 11 on a part thereof, and the tip thereof is inserted into a tip-off portion of a valve (not shown). More specifically, the long introductory wire 1 has its bending point a portion embedded in the glass bridge 4 and is bent so that the apex of the bending point a is aligned with the central axis direction of the glass bridge 4. There is. At that time, when the bending angle α of the bending point a is set, α ≦ 160 °.

On the other hand, the short internal lead-in wire 2 has a tightly wound connection portion 21 formed at its tip. Further, the bending point b of the short internal lead-in wire 2 is embedded in the glass bridge 4, and the apex of the bending point b is oriented in a direction opposite to the bending point a of the long internal lead-in wire. It is bent. At that time, when the bending angle β of the bending point b is set, β ≦ 160 °.

Further, the supporter 3 has a hook portion 31 for supporting a filament (not shown) at its tip. In addition, the bending point c of the supporter 3 is embedded in the glass bridge 4, and the supporter 3 is bent such that the apex of the bending point c is in a direction opposite to the bending point a of the long internal lead-in line. At that time, when the bending angle γ of the bending point c is set, γ ≦ 160 °.

Next, the effect of this invention will be shown with reference to FIG. FIG. 3 shows bending angles α, β, γ at bending points a, b, and c, and one of 100 long sample filament assemblies, one of the long and short internal lead wires and one of the supporters. The relationship of the rotation occurrence rate of the filament assembly that was rotated at all times was obtained. If the bending angle α, β, γ of any one of the bending point a, the bending point b, and the bending point c is 170 °, two long and short internal lead wires of the sample filament assembly or the supporter The number of filament assemblies rotated by any one was 30. Therefore, the rotation generation rate was 30%. Even when any one of the bending points a, b, and c has a bending angle α, β, γ of 165 °, the number of similarly rotated filament assemblies was five. Therefore, the rotation generation rate was 5%. When all the bending angles α, β, and γ at the bending points a, b, and c were 160 °, the number of similarly rotated filament assemblies was 0. Therefore, the rotation generation rate was 0%. When all the bending angles α, β, γ at the bending points a, b, and c were 155 °, the number of filament assemblies similarly rotated was 0. Therefore, the rotation generation rate was 0%.

From the above experimental results, when the long and short internal lead wires and the bending angles α, β, γ of the supporters are all 160 ° or less, the long and short internal lead wires of the filament assembly are Also, it is understood that none of the supporters rotates.

[0016]

[Effect of device]

 As described in detail above, the filament assembly of the present invention has a bending angle of 160 ° or less in each of the two long and short inner lead wires and the portion embedded in the glass bridge of the supporter. As a result, the filament assembly has a structure in which the long and short internal lead wires and the supporter do not rotate even when a force is applied to the filament assembly from the outside in various processes. Therefore, the axis connecting the connecting portions formed on the two long and short internal lead wires will not be displaced. When the filament is connected to this connecting portion, the filament shape becomes a desired shape.

[Brief description of drawings]

FIG. 1 shows a filament assembly according to the present invention.

FIG. 2 shows a conventional filament assembly.

FIG. 3 shows an experimental result for explaining the effect of the present invention.

[Explanation of symbols]

 1 Internal Introduction Line 2 Internal Introduction Line 3 Supporter 4 Glass Bridge 11 Splice Line 21 Splice Line 31 Hook 5 Internal Introduction Line 6 Internal Introduction Line 7 Supporter 8 Glass Bridge 51 Fitting Concave 61 Fitting Concave 71 71 Fitting Concave

Claims (1)

[Scope of utility model registration request] 1. A long internal lead-in wire for connecting the filament, a short internal lead-in wire for connecting the filament, a supporter for supporting the filament, and two long and short internal lead-in wires. In a filament assembly comprising a glass bridge for fixing a supporter and, the long internal introduction line is bent so that the apex of the bending point is in the central axis direction of the glass bridge, and the short internal introduction line is The apex of the bending point is bent in a direction opposite to the bending point of the long internal introduction line, and the supporter is bent so that the apex of the bending point comes in a direction opposite to the bending point of the long internal introduction line. The long and short two internal introduction lines and the respective bending points formed on the supporter are embedded in the glass bridge, and When the bending angle is α, α ≦ 160 ° When the bending angle of the short internal lead wire is β, β ≦ 160 ° When the bending angle of the supporter is γ, a value defined by γ ≦ 160 ° A filament assembly characterized by being set to.