JPS6039786A - Method of connecting base pin of tubular bulb and lead wires - 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 relates to a method for caulking a base pin and a lead wire.

[Technical background of the invention and its problems]

For example, in old tube-shaped or ring-shaped base lamps for general lighting, the lead wire led out from the end of the bulb is inserted into the cap pin of the cap and connected. Instead of welding, attempts have been made to connect the cap pin and the lead wire by pressing a portion of the cap pin with a punch. In this method, once the lead wire is inserted into the cap pin, a part of the cap pin is crushed to press the cap pin and the lead wire into pressure contact, and then,
The unnecessary portion of the lead wire led out from the opening at the tip of the cap pin is cut and removed using a cutter or the like. By the way, when cutting and removing the lead wire, it is necessary to cut the lead wire so that it does not protrude from the opening surface of the tip of the cap pin, but it is extremely difficult to align the cap pin and the cutter with high precision. Therefore, when cutting the lead wire, the cutter may come into contact with the tip of the cap pin, causing problems such as early wear of the cutter and formation of burrs at the tip of the cap pin.

For this reason, conventionally, when cutting and removing the lead wire, the lead wire is cut at a portion slightly distant from the tip opening of the cap pin, and then the lead wire is cut off at a location slightly distant from the tip opening of the cap pin. The method used is to scrape off the part with a grinder or the like.

However, this method requires special post-processing and equipment for scraping the lead wires, which increases the number of man-hours, complicates the cutting process, and increases costs. Moreover, according to the pressure welding method as described above, the lead wire may be forcibly pulled onto the cap pin 911 when the cap pin is crushed, which may cause the lead wire to be severed or damage to the sealed portion. .

[Purpose of the invention]

The present invention was made based on these circumstances, and
After pressure welding, the lead wire does not protrude from the tip opening of the cap pin, and the special cutting process required in the conventional method is no longer necessary, simplifying the work, and there is no risk of the lead wire being forcibly pulled during pressure welding. To provide a method for connecting a cap pin and a lead wire in a tube, which can prevent lead wires from being separated and damage to their sealing parts, and which can provide reliable contact with good quality.

[Summary of the invention]

That is, in order to achieve the above object, the method of the present invention, once the lead wire is inserted into the cap pin, the portion of the lead wire led out from the tip opening of the cap pin is inserted into the tip opening. Cut and remove the lead wire with a certain length left, and then insert the remaining part of the lead wire protruding from the tip opening of the cap pin until its tip surface is at least flush with the tip opening surface of the cap pin. It is characterized in that it is pushed back inward, and in this state, the base pin is caulked and brought into pressure contact with the lead wire.

[Embodiments of the invention]

Hereinafter, a simple embodiment of the present invention will be explained based on FIGS. 1 to 5 in which it is applied to an annular fluorescent lamp.

In the figure, reference numeral 1 denotes a bulb bent into an annular shape, and flared portions 3 of a stem 2 are sealed to both ends of the bulb 1, respectively. A pair of lead wires 4, 4 are hermetically sealed through the stem 2, and a filament 5 is connected between the tip portions of these lead wires 4, 4 located inside the bulb 1. The other end is led out of the valve l.

A synthetic resin cap 6 is attached between both ends of the valve l, and four cap pins 7 each having a cylindrical shape are protruded from one side of the cap 6. ing. Lead 1 wires 4.4 led out from both ends of the valve 1 are respectively inserted into these cap pins 7.
It is electrically connected by caulking...

Next, a procedure for connecting the base pins 7 and the lead wires 4, 4 will be explained. First, as shown in FIG. 3, when the lead wire 4 is inserted into each cap pin 7..., the tip opening 8 of the cap pin 7... in this lead wire 4 is inserted.
The unnecessary portion 9 guided outward from the tip opening 8
It is cut and removed using a cutter 10 or the like, leaving a certain length 2 remaining.

Next, after positioning and holding the valve 1 in a position with the cap pins 7 facing downward using a chuck or the like (not shown), the guide block 11 is raised from below the cap 6 as shown in FIG. 4 installed in block 11
The cap pins 7 are inserted into the guide holes 12 of the book, and the tips of each are inserted into the guide block 11.
It is led out into the internal hollow part 13. Subsequently, hollow part 1
Raise the push-up block 14 placed in the fourth
As shown in the figure, the upper surface I5 of this push-up block 14
are brought into contact with the tip openings 8 of the four base pins 7... Due to this slight contact, the cap pin 7 of the lead wire 4
The remaining portion 16 that is missing by a certain length from the tip opening 8 of . The portion is flush with the opening surface of the tip opening 8 of the cap pin 7 .

In this state, each guide hole I2 is inserted into the guide block 11.
..., insert the four punches 17 corresponding to the base pin 7.
When moved forward to the side, each punch 17 will open as shown in FIG.
A small-diameter hammering portion 18 at the tip enters into the guide hole 12 and crushes a part of the tip side of the cap pin 7 radially inward and swages it. The caulking portion 19 presses the lead wire 4 against the inner surface ζ of the cap pin 7, completing the electrical connection between the cap pin 7 and the lead wire 4.

According to this method, after cutting and removing the unnecessary portion 9 of the lead wire 4, the sand and back portion 16 protruding from the tip opening 8 of the cap pin 7 are pushed back into the cap pin 7, and this Since the cap pin 7 is caulked with the tip end surface of the lead wire 4 and the opening surface of the cap pin 7 flush with each other, the lead wire 4 is attached to the cap after the connection between the lead wire 4 and the cap pin 7 is completed. There is no protrusion from the opening at the tip of the pin 7, and the conventional cutting and finishing of the lead wire 4 and its equipment are not necessary. Therefore, the number of work steps can be reduced and work efficiency can be improved. In addition, the pushing back of the lead wire 4 can be performed continuously during the 1-step process from cutting and removing the unnecessary portion 9 to caulking, which, together with the reduction in the number of work steps mentioned above, is convenient for automation and reduces costs. It also contributes to reduction.

Moreover, since the lead wire 4 is bent within the cap pin 7 by being pushed back, even if a tensile force is applied as the cap pin 7 is caulked, this force can be absorbed and alleviated. Therefore, there is no need to undesirably break the lead wire 4, and there is no need to apply unnecessary force to the sealed portion of the stem 2, so it is possible to prevent the occurrence of cracks, etc., and there is an advantage that a reliable connection with good quality can be obtained. be.

1g The present invention is not limited to the above-mentioned embodiment, and for example, as shown in FIG.
On the upper surface of 4, there are provided pressing bodies 22 which can be attached in the protruding direction by springs 21 in correspondence with the top pins 7, and these suppressing bodies 2Z... The remaining portion 16 of the lead wire 4 is individually attached to the cap pin 7.
...You may push it back inward. This method has the advantage that variations in the protruding length of the lead wires 4 can be absorbed, and pushing back can be performed more reliably.

In addition, in the pointed embodiment described above, the case where the cap pin and the lead stag of an annular fluorescent lamp are connected has been explained. In addition to fluorescent lamps,
It can be applied to all tubes with caps equipped with cap pins.

[Effects of the Invention] According to the present invention ζ as stated above, after cutting and removing the lead wire, the remaining portion of the lead wire protruding from the tip opening of the cap pin is pushed back into the cap pin, and in this state, Since the cap pin is caulked, the lead wire does not protrude from the opening at the tip of the cap pin q) after the connection is completed, and the special cutting and finishing of the lead wire and its equipment as in the past are unnecessary. Therefore, the number of work steps can be reduced, the work becomes easier, and it is convenient for automation, and costs can be reduced. Moreover, as the lead wire is pushed back, the lead wire bends within the cap pin, so even if a tensile force is applied during caulking, this tensile force can be absorbed and alleviated, thereby preventing lead wire breakage and adverse effects on the lead wire sealing area. This has the advantage that it can be prevented and a reliable connection with good quality can be obtained.

[Brief explanation of the drawing]

Figures 1 to 5 show one embodiment of the present invention, Figure 1 is a cross-sectional view of the mouthpiece, Figures 2 to 5 are process explanatory diagrams showing the work steps in order, and Figure 6 is a diagram of the main body. FIG. 7 is a sectional view showing another embodiment of the invention. 1... Valve, 4... Lead wire, 7... Base pin, 8... Tip opening, 9... Unused part, 16...
・Remaining part. Applicant's Representative Patent Attorney Takehiko Suzue Figure 1 Figure 2 Figure 4 Figure 5 Figure 6 Procedure Supplement ＼ Original Book November 1, 2, 1981 Mr. Manabu Shiga, Commissioner of the Patent Office, of the case Indication Patent Application No. 58-149055 2, Name of the invention Method for connecting cap pins and lead wires in tubes 3 Relationship with the case of the person making the amendment Patent applicant (307) Toshiba Corporation 4, Agent (2) Drawings Attachments Figures 7, 8, and 9 are attached hereto. Description 1. Title of the invention: Method for connecting a cap pin and lead wire in a tube. In the method of connecting the cap pin and the lead wire by caulking, after the lead wire is inserted into the cap bottle, the portion of the lead wire that is led out from the tip opening of the cap pin is inserted into the tip opening. By cutting and removing the lead wire with a certain length remaining from the base pin, and then pushing the remaining part of the lead wire protruding from the tip opening of the base pin back into the base bottle.
A method for connecting a cap pin and a lead wire in a tube, characterized by bending the lead wire and caulking the cap pin in this state to bring the cap pin and the lead wire into pressure contact. 3. Detailed Description of the Invention [Technical Field of the Invention] The present invention relates to a method for caulking a base pin and a lead wire. [Technical background of the invention and its problems] For example, in a straight tube type or annular fluorescent lamp for general lighting, the lead wire led out from the end of the bulb is connected by inserting it into the base pin of the base. However, recently, instead of the conventional soldering or welding, attempts have been made to connect the cap pin and the lead wire by pressing a portion of the cap pin with a punch. In this method, once the lead wire is inserted into the cap bottle, a part of the cap pin is crushed to bring the cap pin and the lead wire into pressure contact, and then the lead drawn out from the opening at the tip of the cap pin is pressed. The unnecessary parts of the wire are cut and removed using a cutter or the like. By the way, when cutting and removing the lead wire, it is necessary to cut the lead wire so that it does not protrude from the opening surface of the tip of the cap pin, but it is extremely difficult to align the cap pin and the cutter with high precision. When cutting the lead wire, the cutter may come into contact with the tip of the cap bottle, causing problems such as early wear of the cutter and formation of burrs at the tip of the cap bottle. For this reason, conventionally, when cutting and removing the lead wire, the lead wire is cut at a portion slightly away from the tip opening of the cap bottle, and then the lead wire is cut off at a portion slightly away from the tip opening of the cap bottle. The method used is to scrape off the part with a grinder or the like. However, this method requires a special post-process for scraping off the lead wires and a cutting device, which increases the number of man-hours, complicates the work, and increases costs. Moreover, according to the pressure welding method as described above, when the cap bottle is crushed, the lead wire may be forcibly pulled into the cap bottle, which may cause the lead wire to be severed or damage to the sealed portion. [Object of the invention] The present invention was made based on the above circumstances, and
After pressure welding, the lead wire does not protrude from the tip opening of the cap bottle, and the special cutting process required in the past is not required, simplifying the work, and there is no risk of the lead wire being forcibly pulled during pressure welding. To provide a method for connecting a cap bottle and a lead wire in a tube bulb, which can prevent splitting of the lead wire and damage to its sealed portion, and provide a reliable connection with good quality. [Summary of the Invention] That is, in order to achieve the above object, the method of the present invention inserts a lead wire into a cap bottle, and then inserts a portion of the lead wire led out from the tip opening of the cap bottle.
Cut and remove with a certain length left from this tip opening,
Next, the remaining portion of the lead wire protruding from the opening at the tip of the cap bottle is pushed back into the cap pin to give the lead wire some flex, and in this state, the cap bottle is caulked so that it comes into pressure contact with the lead wire. It is characterized by the following. [Embodiments of the Invention] A first embodiment of the present invention will be described below with reference to FIGS. 1 to 5, in which the invention is applied to an annular fluorescent lamp. In the figure, 1 is an annularly curved valve, and this valve l
The flare portions 3 of the stem 2 are sealed to both ends of the stem 2, respectively. A pair of lead wires 4, 4 are hermetically sealed through the stem 2, and a filament 5 is connected between the tips of these lead wires 4, 4 located inside the bulb 1. , the other end is led out of the valve 1. A synthetic resin cap 6 is attached between both ends of the valve l, and a hollow cylindrical 4 is attached to one side of the cap 6.
A book cap bottle 7... is provided protrudingly. Lead wires 4, 4 led out from both ends of the valve 10 are inserted into these cap bins 7, respectively, and are electrically connected by tightening the cap bins 7. Next, a procedure for connecting the cap bottle 7 and the lead wires 4, 4 will be explained. First, the lead wire 4 is inserted into each cap bottle 7 as shown in FIG. A gate-shaped cutter is brought into contact with the unnecessary portion 9 of the lead wire 4 while leaving the unnecessary portion 9 of a certain length l from the tip opening 8.
Cut and remove with a slide (cutter 10, etc.). Next, once the valve 1 is positioned and held in a position in which the cap bottle 7 is pressed downward by a chuck or the like (not shown), the guide block 11 is raised from below the cap 6 as shown in FIG. The cap bottles 2 are inserted into the four guide holes 12 provided in the guide block 11, and the tips of each are inserted into the guide block 1.
1 into the hollow section 13 inside the tube. Subsequently, the pusher placed in the hollow part 13 raises the block 14, and as shown in FIG.
5 is brought into contact with the tip openings 8 of the four cap bottles 7... Due to this contact, the base pin 7 of the lead wire 4
The remaining portion 16 protruding by a fixed length of 4 minutes from the tip opening 8 of ... is pushed back into the cap bin 7..., and the lead wire 4 is bent inside the cap bin 2... and its tip is flush with the opening surface of the tip opening 8 of the cap bottle 7. In this state, each guide hole 1 is inserted into the guide block 11.
When the four punches 17 provided corresponding to 2... are advanced toward the cap bottle 2 side, each punch 1
7, a small-diameter striking portion 18 at the tip enters into the guide hole 12,
A part of the tip side of the cap bottle 7 is crushed and caulked inward in the radial direction. Then, the lead wire 4 is pressed against the inner surface of the cap bottle 7 by the caulking part 19, and the cap bottle 7 and the lead wire 4 are brought into contact with each other.
The electrical connection is completed. According to the first embodiment of the present invention, after the unnecessary portion 9 of the lead wire 4 is cut and removed, the remaining portion 16 protruding from the tip opening 8 of the cap bin 7 is pushed back into the cap bin 7. The connection between the lead wire 4 and the cap pin 7 is made so that the lead wire 4 is bent and the cap pin 7 is caulked with the tip end surface of the lead wire 4 and the opening surface of the cap bottle 7 flush with each other. After completion, the lead wire 4 does not protrude from the tip opening of the cap bottle 7, and the conventional cutting and finishing of the lead wire 4 and its equipment become unnecessary. Therefore, the number of work steps can be reduced and work efficiency can be improved. Moreover, the work of pushing back the lead wire 4 can be carried out continuously during the series of processes from cutting and removing the unnecessary part 9 to caulking work, so this reduces the number of work steps mentioned above, is convenient for automation, and reduces costs. It also contributes to Moreover, since the lead wire 4 is bent in the cap bin 7 by being pushed back, even if a tensile force is applied due to the tip of the cap bin 7 at t7, this force can be absorbed and alleviated. Therefore, there is no need to apply unnecessary force to the sealed portion of the stem 2, as well as undesirable breakage of the lead m4.
This has the advantage of being able to prevent the occurrence of problems, etc., and providing a reliable connection with good quality. In carrying out the first embodiment described above, for example, as shown in FIG.
The protruding press body 22 is biased in the protruding direction by
... may be provided, and the remaining portions 16 of the four lead wires 4 may be individually pushed back into the cap bottle 7 by these pressing bodies 22. This method has the advantage that variations in the protruding length l of the lead wires 4 can be absorbed, and pushing back can be performed more reliably. Furthermore, the present invention is not limited to the first embodiment described above, and FIG. 7 shows a second embodiment of the present invention. In this second embodiment, on the upper surface 15 of the push-up block 14,
It has a tapered shape, and the diameter l□ of the tip is the inner diameter of the cap bottle 7! A pressing protrusion 31 smaller than , is provided protrudingly, and the remaining portion 16 of the lead wire 4 is
In this method, the lead wire 4 is completely pushed into the cap bin 7, that is, pushed into the cap bin 7 by a length r beyond the tip opening 8 of the cap bin 7, which is the tip of the lead wire 4. According to the second embodiment, even if the lead wire 4 is stretched due to the subsequent caulking work,
The tip of the lead wire 4 does not protrude from the tip opening 8 of the cap bottle 7, and the reliability of the work is further improved. Furthermore, in the third embodiment of the present invention shown in FIG.
and on the axis of this push-up bottle 4,
A rod-shaped body 42 made of a metal material harder than the push-up bottle 4I, for example, a cemented carbide used for a drill, etc., is incorporated, and one end of this rod-shaped body 42 is made to protrude beyond the tip surface of the push-up bottle 41. In this case, the dimensional relationship between the rod-shaped body 42 and the cap bottle 7 is such that the diameter of the rod-shaped body 420! □, when the inner diameter of the cap bottle 7 is 12, it is defined as 12≧11, and the limit of the difference between l and l is ノ□-72
-0,3. According to the third embodiment of the present invention, the remaining portion 16 of the lead wire 4 is brought into contact with the rod-shaped body 42 and the base pin 7 is
In this case, the rod-shaped body 42 is made of a harder material than the push-up bottle 41 as a separate body, so even though the rod-shaped body 42 is small enough to be pushed into the cap bottle 7, Regardless, sufficient strength can be provided, and breakage and deformation of the rod-shaped body 42 can be prevented. Furthermore, by defining the dimensional relationship between the rod-shaped body 42 and the cap bottle 7 as described above, the diameter of the rod-shaped body 420 can be adjusted to the diameter of the cap bottle 7.
Since the inner diameter of the lead wire 4 is approximately equal to the inner diameter of the lead wire 4, even if a slight crack occurs at the cut portion of the lead wire 4, for example, the lead wire 4 can be forcefully pushed into the cap bottle 7, and therefore, the pushing operation can be performed reliably. , efficiency is improved. Furthermore, as in the fourth embodiment of the present invention shown in FIG.
The flange portion 51 on the tip side and the push-up block 14
An elastic block body 52 made of an elastic material such as rubber may be interposed between the upper surface 15 and the upper surface 15. According to the fourth embodiment, the impact force applied to the tip of the rod-shaped body 42 when the lead wire 4 is pushed in and when the cap bottle 7 is caulked can be absorbed and alleviated by the elastic block body 52. This makes it possible to more reliably prevent damage to the small-diameter rod-shaped body 42. In addition, in each of the above-mentioned embodiments, the case where the cap bottle and the lead wire of a ring-shaped fluorescent lamp are connected has been described, but the method of the present invention is not limited to this, and can be implemented in the same manner even when a straight-tube fluorescent lamp is used. In addition to fluorescent lamps,
[Effects of the Invention] According to the method of the present invention detailed above, after the lead wire is cut and removed, the EJ metal bottle in this lead wire is removed. The remaining part protruding from the tip opening was pushed back into the cap to give it some flex, and the cap bottle was caulked in this state, so that the lead wire would protrude from the tip opening of the cap bottle after the connection was completed. This eliminates the need for the conventional special -P wire cutting and finishing process and its equipment. Therefore, the number of work steps can be reduced, the work becomes easier, and it is convenient for automation, and costs can be reduced. Moreover, since the lead wire bends within the cap bottle, even if tensile force is applied due to subsequent caulking work, this tensile force can be absorbed and alleviated.
Therefore, it is possible to prevent breakage of the lead wire and adverse effects on the lead wire sealing portion, and there is an advantage that a reliable connection with good quality can be obtained. 4. Brief Description of the Drawings Figures 1 to 5 show a first embodiment of the present invention.
The figure is a cross-sectional view of the base part, Figures 2 to 5 are step-by-step process explanatory diagrams showing the working process, Figure 6 is a cross-sectional view showing a modification of the first embodiment, and Figure 7 is a cross-sectional view of the present invention. FIG. 8 is a sectional view showing a third embodiment of the invention, and FIG. 9 is a sectional view showing a fourth embodiment of the invention. DESCRIPTION OF SYMBOLS 1... Pulp, 4... Lead wire, 7... Cap bottle, 8... Tip opening, 9... Unused part, 16...
Remaining portion O Applicant's agent Patent attorney Takehiko Suzue Figure 7 Figure 8 Figure 9 Figures 7, 7

Claims (1)

[Claims] A method of connecting the cap pin and the lead wire by inserting the lead wire led out from the end of the valve into the hollow cylindrical cap pin and caulking the cap pin. Once the lead wire has been inserted through the tip opening of the cap pin, cut and remove the portion of the lead wire led outward from the tip opening of the cap pin, leaving a certain length from the tip opening. Push the remaining part of the lead wire protruding from the base pin back into the base pin until its tip surface is at least flush with the opening surface of the tip opening of the base pin, and in this state, caulk the base pin to connect it to the base pin. A method for connecting a cap pin and a lead wire in a tube, characterized by pressure contacting the lead wire.