JPS5828710B2 - Indicator lamp and its manufacturing method - Google Patents

Description

[Detailed description of the invention] The present invention relates to an indicator lamp and a method of manufacturing the same.

BACKGROUND ART In recent years, electronics technology has made remarkable progress, and various electronic devices and the like have been manufactured.

2. Description of the Related Art Generally, electronic devices and the like have built-in display lamps for informing the outside of their operating status, and as various electronic devices and the like have appeared, the demand for display lamps has also increased.

Incidentally, conventionally, this type of small-sized display lamp has been generally manufactured as shown in FIG.

That is, ■ First, the lamp body 1 is manufactured in advance through a predetermined process.
The lead terminal 2 made of a thin wire provided in the lamp body 1 is cut near the bottom of the lamp body 1 (see Fig. 2B).

■Next, in order to make it easier to attach the indicator lamp on the finished product to a printed circuit board, etc., connect the connection terminal 3, which is made of a slightly thick wire prepared separately, to the lead terminal 2 with a solder pad 4 (see Figures B and C). reference).

■ Next, insert the bottom of the lamp body 1 into the base 5 and house it while inserting the connection terminal 3 through the hole sa of the bottomed cylindrical glass base 5 for protecting the lamp body 1 which functions as a holder (2. (See figure E).

(2) At that time, apply adhesive to the inside of the base 5 and/or the bottom of the rung body 1 so that the two are firmly bonded.

■' After that, cut the connection terminal 3 to the desired length (see the figure below).

It was manufactured through the following steps.

However, according to the above-mentioned conventional method, when manufacturing indicator lamps, a soldering process is included in the manufacturing process, but this soldering work is generally done by hand, resulting in very low productivity. Because it is complicated, this work in particular among the steps ① (②) has been a factor that hinders mass production.

In addition, adhesive is used when inserting the lamp body 1 into the base 5, but if the amount of this adhesive is too large, it will protrude to the outside as shown by the reference numeral 6 in Figure E, spoiling the appearance. This had the drawback of causing a decrease in product value.

In addition, in the conventional display lamp constructed in this way, the thin wire lead terminal 2 and the connection terminal 3 are connected by soldering, but the strength of this part is weak and the soldering 4
If there is variation in the solder, the solder can easily come off during assembly work or when handling the finished product, causing the terminals to disconnect from each other and causing a malfunction, or the soldered parts may corrode due to long-term use. was there.

The present invention improves the above-mentioned drawbacks by eliminating the soldering process, bonding process, etc. that mainly hinder mass production, thereby preventing wire breakage caused by soldering, and improving mass productivity. The object of the present invention is to provide an indicator lamp and a method for manufacturing the same.

Hereinafter, the present invention will be explained along with the drawings.

FIGS. 2A to 2E show embodiments of the present invention. In these figures, 11 is a lamp body, which is manufactured through a predetermined manufacturing process, and inside the glass tube 12. A filament 14 as a light emitting source is provided via a stem 13, and the filament 1
A thin wire lead terminal 15 electrically connected to 4 is provided externally.

Reference numeral 16 denotes a cylindrical base with a bottom, which is made of a molded product and is used to protect the lamp body 11. The inner diameter of the lamp body storage portion 17 of this base 16 is formed to be slightly smaller than the outer diameter of the lamp body 11. More specifically, as shown in FIG. 3, the base of a tubular connection terminal 18 is integrally buried in the bottom.

The connection terminal 18 is made of a conductive metal material, and a hollow portion 18a formed along the axial direction communicates with the lamp body storage portion 17 of the base 16 made of synthetic resin such as plastic.

The connection terminals 18 are buried at the same time as the base 16 is manufactured by injecting synthetic resin into a mold.

Next, the manufacturing method of the present invention will be explained.

■ First, connect the lead terminal 15 of the lamp body 11 to the base 16.
A part of the lamp body 11 is stored in the lamp body storage portion 17 of the base 16 while the connection terminal 18 is inserted into the hollow portion 18a (see figures A to C).

In this case, since the inner diameter of the base 16 is formed to be slightly smaller than the outer diameter of the lamp body 11, the lamp body 11 can be inserted into the base 16 by pushing the lamp body 11 into the base 16 with a slight force and fitting the lamp body 11 into the base 16. 16, and thus the lamp body 11 and the base can be integrally joined without the need for any adhesive.

(2) Next, the lower ends of the connection terminals 18 are crimped using a suitable jig to electrically connect the lead terminals 15 and the connection terminals 18 embedded in the base 16 (see Figure 2).

■ After that, the indicator lamp is completed by cutting off the unnecessary lead terminal 15 exposed to the outside from the lower end of the connecting terminal 18 (see figure E) 6 In this case, the lower end of the connecting terminal 18 is connected. The same objective can also be achieved by

FIG. 4 shows a small indicator lamp that has been stolen in this way.

In the above process, the lower end of the connection terminal 18 is crimped to electrically connect the lead terminal 15 and the connection terminal 18. It is also possible to connect directly.

As described above, according to the present invention, it is possible to easily electrically connect the two by simply crimping the tubular connection terminal through which the lead terminal made of a thin wire on the lamp body side is inserted, and the soldering process This eliminates the need for the soldering process, which greatly improves productivity compared to the conventional method, where the soldering process was the main obstacle to mass production, and there is no risk of wire breakage, corrosion, etc. due to soldering.

In addition, by simply pushing the lamp body into the bottomed cylindrical base, which is formed with a slightly smaller diameter than the outside diameter of the lamp body, the two can be integrally joined without using any adhesive. However, according to the present invention, only the final step is required, so the manufacturing process is shorter than that of the conventional example. There are advantages such as reducing the number of parts, making it extremely easy to manufacture, mass production is possible, and cost reduction can also be achieved.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing the conventional manufacturing process, FIG. 2 A to H are an embodiment showing the manufacturing process of the present invention, FIG. It is an indicator lamp according to the present invention. 11...Lamp body, 15...Lead terminal, 16.
...Plastic base, 18...Connection terminal, 18
a...Hollow part.

Claims (1)

[Claims] 1. A part of the lamp body 11 having the lead terminal 15 is
The lead terminal 15 is pushed into and stored in a bottomed cylindrical base 16 having a tubular connection terminal 18 at the bottom, and is inserted into the connection terminal 18 by crimping the connection terminal 18. and a connecting terminal 18 are electrically connected to each other. 2. The lamp body 11 having the lead terminal 15 is formed into a bottomed cylinder having a tubular connection terminal 18 at the bottom and a lamp body housing portion 11 formed with a diameter slightly smaller than the outer diameter of the upper lamp body 4. It is configured by pushing the lead terminal 15 into the shaped base 16, then crimping the lower end of the connecting terminal 18, and then cutting the lead terminal 15 exposed to the outside from the lower end of the connecting terminal 18. A method for manufacturing a display lamp characterized by: