JPH02235302A - electronic components - 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 Field of the Invention The present invention relates to a dip type electronic component used mainly in video equipment such as video equipment.

Conventional technology The conventional technology will be explained with reference to FIGS. 3 to 6.

FIG. 3 is a side sectional view of a conventional small variable resistor, and the fourth
The figure is an exploded perspective view of the resistor board and outer terminal before insert molding in the case of the same small variable resistor. Figure 6 is an exploded perspective view of the same small variable resistor. Figure 6 shows the suction nozzle and It is a figure which shows the deviation|shift at the time of adsorption|suction of the same small variable resistor.

3 to 6, reference numeral 1 denotes a resistor substrate to which external terminals 2 are attached, and in this state, a case 3 is formed by insert molding.

Reference numeral 4 denotes a mounting plate made of stainless steel material, on which a knob 6 having a driver groove in its center portion and a slider 6 are rotatably integrated. Further, the mounting plate 4 is partially plated with solder to form an intermediate terminal portion and a connection portion 4& to be connected to an external electrode.

A thermosetting resin 7 is applied to the entire upper surface of the opening of the case 3 to bring the mounting plate 4 into close contact with the resin, and is heated and hardened to fix the case 3 and the mounting plate 4 together.

As described above, the case 3 and the mounting plate 4 are mechanically held together by the resin 7 between them, and the interior of the case 3 is hermetically sealed by the mounting plate 4.

When the small variable resistor configured as described above is mounted on a printed circuit board, the suction nozzle 1o of mounting equipment (not shown) is brought into contact with the knob of the small variable resistor, and the suction nozzle 1o is used to suck the small variable resistor. As a result, the small variable resistor 11 is attached to the suction nozzle 1o and moved and mounted at a predetermined position on the printed circuit board.

Problems to be Solved by the Invention However, in electronic components such as the conventional small variable resistor, if a misalignment occurs between the suction nozzle 1o of the mounting equipment and the electronic component as shown in FIG. Problems arise, such as air leakage, reduced suction force, and poor mounting.Especially when electronic components become smaller, it is necessary to strictly control misalignment between the suction nozzle and electronic components. , the electronic components to be mounted were limited.

The present invention is intended to solve such conventional problems, and aims to provide an electronic component that can improve the mounting rate.

Means for Solving the Problems In order to solve the above problems, the present invention integrates the knob and the mounting plate by making the upper surface of the knob the same as or slightly lower than the surface of the mounting plate.

Function As mentioned above, since the top surface of the knob is set to be the same as or slightly lower than the mounting plate surface, the suction nozzle targets the mounting plate surface, so even if there is a misalignment, the suction nozzle will be attached to the mounting plate surface that is larger than the knob. Since they are in contact with each other, air leakage is eliminated and the mounting rate is improved.

Embodiment An embodiment of the present invention will be explained using a small variable resistor shown in FIGS. 1 and 2. FIG. 1 is a side sectional view of a small variable resistor, and FIG. 2 is a diagram showing the deviation between a suction nozzle and the same small variable resistor during suction.

Note that the same parts as those in the conventional example are given the same numbers and the description thereof will be omitted. According to FIGS. 1 and 2, 8 is a knob which has a driver groove, is flush with or slightly lower than the surface of the mounting plate 4, and is rotatably integrated with the slider 6 on the mounting plate 4.

The above small variable resistor has the knob 8 on the mounting plate 4.
Since it is installed at the same level as the surface or slightly lower, 5i!
The suction nozzle 10 of the wearing equipment (not shown) suctions the four surfaces of the mounting plate and is moved and mounted on the printed circuit board.

Furthermore, in the above embodiment, a small variable resistor was explained, but it goes without saying that it can also be applied to other electronic components (trimmer capacitors, etc.) that require this type of sealed structure. In this case, the resistor substrate is another substrate, and the knob and slider are represented as rotating bodies driven by external operating means.

Effects of the Invention As is clear from the above, in the present invention, the rotating body such as the knob is configured to be at the same level or slightly lower than the mounting plate surface, and this mounting plate surface is used as the suction surface, so that there is no κ between the suction nozzle and the product. This has the effect that even if a slight deviation occurs, it is possible to provide the user with a product that has high suction performance and a high mounting rate.

[Brief explanation of drawings]

Figure 1 is a side sectional view of a small variable resistor, Figure 2 is a diagram of the suction nozzle of the mounting equipment and the same small variable resistor, and Figure 3 is a diagram of the suction state of the same small variable resistor.
The figure is a side sectional view of a conventional small variable resistor, Figure 4 is an exploded perspective view of the resistor board and external terminal before insert molding in the case of the same small variable resistor, and Figure 5 is an exploded perspective view of the same small variable resistor. The exploded perspective view and FIG. 6 are diagrams showing the suction state of the suction nozzle of the mounting equipment and the same small variable resistor. 1...Resistor board, 2...Outer terminal, 3
...Case, 4...Mounting plate, 8...
...Knob (rotating body). Name of agent: Patent attorney Shigetaka Awano and 1 other person

Claims (1)

[Claims] A case having a top opening in which a board with external terminals attached is insert-molded at the bottom, a rotating body driven by an external operating means, and a rotating body fixed to the top opening of the case so that the rotating body can be rotated. , and an electronic component further comprising a mounting plate formed by integrating the upper surface of the rotating body so that the upper surface thereof is the same or slightly lower.