JPH0735297Y2 - Leadless terminal bulb - Google Patents

Description

[Detailed description of the device]

[Industrial applications]

The present invention relates to a light bulb, and more particularly, to a light bulb configured to be directly attached to a foil side of a printed circuit board.

[Prior art]

FIG. 3 shows an example of a conventional light bulb 100 of this type, and a pair of lead wire holes 1 penetrating a bottom surface 101a of a base portion 101 made of resin and having a bottomed cylindrical base portion 101.
01b is provided, the lead wire 102a of the light bulb 102 is penetrated through the lead wire hole 101b and pulled out to the outside when the baseless bulb 102 is inserted and attached to the base portion 101, and the portion of the lead wire 102a pulled out. To serve as a mounting terminal to the substrate 110.

[Problems to be Solved by the Invention]

However, the conventional light bulb 100 described above is a baseless light bulb 1.
The lead wire 102a of 02 is also used as a mounting terminal to the printed circuit board 110, and the lead wire 102a is naturally restricted in size, material, etc. from the viewpoint of ensuring airtightness at the time of sealing, etc. However, there were problems such as insufficient strength and poor wettability with respect to solder. Especially in the recent printed circuit board assembly process, resistors,
Other parts such as capacitors will be those of leadless terminals that are attached from the foil side 111 side of the printed circuit board 110,
It becomes impossible to install with the mounting terminal sharing the lead wire 102a at all, and the light bulb 100 has to be manually mounted after the other parts are mounted by passing through the soldering furnace. There has been a problem that production efficiency is lowered, and it has been a problem to solve this problem.

[Means for Solving the Problems]

The present invention is, as a specific means for solving the above-mentioned conventional problems, a blind tubular light bulb insertion hole formed in a substantially rectangular parallelepiped shape with a resin member toward the center of one surface, and from the light bulb insertion hole to the bottom surface. A pair of penetrating lead wire holes, substantially rectangular terminal holes penetrating to the bottom surface on both sides of the bulb insertion hole, and a connecting groove for connecting the lead wire hole and the terminal hole to each other on the bottom surface are provided. A base, a baseless bulb, and a pair of terminals formed of a metal plate member.The baseless bulb is inserted into the bulb insertion hole with its lead wire passing through the lead wire hole. The terminal is inserted into the terminal hole and is formed into a substantially U-shape along the upper and lower surfaces of the base, and a portion along the bottom surface is a leadless terminal portion, and the lead wire has the connecting groove. Reactor characterized in that it is connected to each of the terminals via To provide a dress pin bulb,
As a leadless terminal that can be attached to a printed circuit board, the conventional problems described above are solved.

【Example】

Next, the present invention will be described in detail based on an embodiment shown in the drawings. Reference numeral 1 in FIGS. 1 and 2 is a leadless terminal light bulb according to the present invention (hereinafter abbreviated as light bulb 1), and this light bulb 1 is basically called, for example, a microminiature light bulb. The base 3 is made up of an insulating member such as resin, and the base 3 is provided with a terminal 4 made of a conductive member such as a metal plate. The leadless connection to the printed circuit board 10 is made possible by the and terminals 4. The outer shape of the base 3 is formed into a substantially rectangular parallelepiped shape, and a blind tubular light bulb insertion hole 3a for attaching the baseless light bulb 2 is provided at a substantially center of one surface of the base 3 from the bottom of the light bulb insertion hole 3a. A pair of lead wire holes 3b is provided that penetrates to the bottom surface of the base 3, that is, the surface opposite to the surface on which the bulb insertion hole 3a is provided. In addition, the base 3 has terminal holes 3c on both sides of the light bulb insertion hole 3a, the terminal holes 3c having a substantially rectangular shape whose cross section is substantially aligned with the cross section of a terminal 4 described later, and one surface provided with the light bulb insertion hole 3a. That is, it is supposed to be provided so as to penetrate from the front surface to the bottom surface.
A groove-shaped connecting groove 3d for connecting with 3c is formed. The terminal 4 is formed of a conductive plate-shaped member as described above, and is formed into a substantially L-shape in which the tab 4a is formed by bending the upper end side of the substantially rectangular plate member. The claw portion 4b is formed on the side surface and is appropriately fixed when the claw portion 4b is inserted into the terminal hole 3c. When assembling the light bulb 1 with the baseless bulb 2, the base 3 and the terminal 4 configured as described above, first, each lead wire 2a of the baseless bulb 2 is penetrated into each lead hole 3b of the base 3. Then, the baseless bulb 2 is mounted in the bulb insertion hole 3a, and then the lead wire 2a is passed through each of the terminal holes 3c through the connecting groove 3d and pulled out to the front surface side. Insert the terminals 4 into the terminal holes 3c of the base 3 from the surface side of the base 3 until the tabs 4a abut.
The leadless terminal portion 4c is formed by bending the portion protruding from the bottom surface of the base material along the bottom surface. The lead wire 2a is then preferably connected to the tab 4a by an appropriate means such as soldering or spot welding. With the above configuration, the light bulb 1 of the present invention can be installed leadlessly by simply placing it on the pad 11 of the printed circuit board 10 and passing through the heating furnace as shown in FIG. Become. Further, with the above configuration, the lead wire 2a is housed in the connecting groove 3d and only the leadless terminal portion 4c is exposed on the bottom surface, so that even when the leadless attachment is performed. Interference with other wirings 12 on the printed circuit board 10 may not occur.

[Effect of device]

As described above, according to the present invention, the baseless bulb light bulb is attached to one surface of the base, the terminals having the leadless terminal portions along the bottom surface are provided on both sides, and the lead wire of the baseless bulb is connected to this terminal. By using a leadless terminal bulb connected through the groove without being exposed to the bottom surface, for example, by passing through a solder furnace in the process of assembling a printed circuit board on which this type of bulb is mounted, a semiconductor element,
It can be installed at the same time as other parts such as ICs, resistors, capacitors, etc., and has the extremely excellent effect of eliminating the conventional manual work and increasing the production efficiency of the assembly of this kind of printed circuit board.

[Brief description of drawings]

FIG. 1 is a perspective view showing an exploded view of an embodiment of a leadless terminal light bulb according to the present invention, FIG. 2 is a sectional view taken along line II-II of FIG. 1, and FIG. 3 shows a conventional example. It is a perspective view. 1 …… Leadless terminal bulb 2 …… Baseless bulb 2a …… Lead wire 3 …… Base 3a …… Bulb insertion hole, 3b …… Lead wire hole 3c …… Terminal hole, 3d …… Connecting groove 4 …… Terminal 4a …… tab, 4b …… claw 4c …… leadless terminal

Claims (1)

[Scope of utility model registration request] 1. A blind tubular light bulb insertion hole formed of a resin member in a substantially rectangular parallelepiped shape near the center of one surface, a pair of lead wire holes penetrating from the light bulb insertion hole to the bottom surface, and the light bulb insertion hole. A base having a substantially rectangular terminal hole penetrating to the bottom surface on both sides of the base, and a connection groove connecting the lead wire hole and the terminal hole on the bottom surface, a baseless bulb, and a metal plate member A pair of terminals formed in, the baseless bulb is inserted into the bulb insertion hole with its lead wire penetrating the lead hole, and the terminal is inserted into the terminal hole. The portion along the bottom surface of the base is substantially U-shaped along the upper and lower surfaces is a leadless terminal portion, and the lead wire is connected to each of the terminals via the connecting groove. Characteristic leadless terminal bulb.