JPH0465522B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is used to continuously attach small electrical components to a printed circuit board etc. using an automatic feeder when mounting electrical components such as semi-fixed variable resistors onto a wiring board. The present invention relates to a method of manufacturing an electrical component assembly for supply to a consumer.

[Conventional technology]

Figure 1A (top view), Figure 1B (side view), Figure 1
Figure C (bottom view) shows a semi-fixed variable resistor 1 as an example of a small electric component. This semi-fixed variable resistor 1 has a small size of about 4 mm on one side. A shaft 3 is provided at the center of the substrate 2, and an operating body 4 is provided above the shaft 3. A slit 4a is formed on the upper surface of the operating body 4 for rotational operation by a screwdriver. Further, a slider 7 is provided on the lower surface of the operating body 4 so as to be rotatable therewith. An electrode 5 electrically connected to a slider 7 and a resistor 6 formed concentrically with respect to the shaft 3 are attached to the upper surface of the substrate 2, and the slider 7 is attached to the resistor 6. 6 is in sliding contact. The end of the electrode 5 and both ends of the resistor 6 extend to the edge of the substrate 2. A connection electrode 8a is connected to the end of the electrode 5, and connection electrodes 8b, 8c are connected to both ends of the resistor 8, and each of the connection electrodes 8a, 8b, 8c extends to the back side of the substrate 2. It is extending.

Conventionally, in order to mount this type of semi-fixed variable resistor 1 on a printed circuit board, creamy solder is applied to a pattern on the printed circuit board, and connection electrodes 8a, 8b, and 8c are placed on top of the solder. . Then, the printed circuit board is passed through a furnace at a predetermined temperature, and the solder is melted to fix the connection electrodes 8a, 8b, 8c and the pattern on the board.

[Problems to be solved by the invention] Incidentally, in the manufacturing process of recent electronic equipment units, it is common to supply various electrical components to printed circuit boards using automatic supply machines and then mount them. . However, when the semi-fixed variable resistor 1 as described above is mounted as a single unit on a printed circuit board, there is a drawback that the above-mentioned automation is difficult to implement. That is, there is no optimal means for continuously supplying the semi-fixed variable resistor 1 shown in FIGS. 1A to 1C as a single unit to a predetermined position of an automatic feeder, and there is also no suitable means for continuously supplying the semi-fixed variable resistor 1 shown in FIGS. Arranging them one after another requires grasping the substrate 2 itself, which is unstable.

The present invention has been made by focusing on the above-mentioned conventional problems, and enables electrical components to be continuously supplied onto a wiring board by an automatic supply machine, and furthermore,
It is an object of the present invention to provide a method for manufacturing an electrical component assembly in which conventional electrical components can be used as they are.

[Means for solving problems]

The method for manufacturing an electrical component assembly according to the present invention is characterized by comprising the following steps (a) to (c).

(a) A connecting part and a plurality of sets of metal terminals connected to the connecting part are formed from metal plates; (b) A resin case is fixed to each set of metal terminals, and at this time, the above-mentioned A metal terminal is exposed inside the case, and (c) an operable electronic component, in which a board having a conductive circuit and an operation body that controls a contact part to the conductive circuit is pre-assembled, is housed in the case. [Operation] In the above means, the electrode portion of the operable electronic component is brought into contact with the metal terminal exposed in the case and soldered. The case is fixed to the set of metal terminals by outsert molding. At this time, the metal terminal is exposed inside the case, and the electrode portion of a completed or almost completed operable electric component such as a semi-fixed variable resistor is soldered to this terminal. Therefore, electrical components such as semi-fixed variable resistors can be installed inside the case using a normal soldering process, and through this soldering process, a connected body in which multiple cases and electrical components are connected is obtained. be able to. In addition, since the electrical components only need to be soldered to the case, the structure of electrical components such as semi-fixed variable resistors can be kept the same as before, and there is no need to change the components to form the connection body. .

When mounting the above-mentioned electrical components on a wiring board, load the connecting part that connects the cases or a separate connecting member into an automatic feeder, and separate the parts by removing the protruding parts of the metal terminals, etc. The case is supplied to the wiring board, and the terminals protruding from the case are attached to the through holes of the wiring board.

〔Example〕

Embodiments of the present invention will be described below with reference to FIG. 2 and the following drawings.

FIGS. 2 to 6 show the assembly of electrical parts used in the present invention in the order of manufacturing steps.

First, with reference to FIG. 6, the structure of a connected body of electrical components using the semi-fixed variable resistor 1 will be explained.

In the completed state, the semi-fixed variable resistor 1 is installed on a case 11 made of resin. This case 11 includes a set of three metal terminals 12a, 12b, 1
2c is outsert molded. Then, the connection electrode 8 of each semi-fixed variable resistor 1
a, 8b, 8c are connected to respective metal terminals 12a, 12b, 12c by solder 14. Further, the ends of each metal terminal 12a, 12b, 12c are connected to each other by a paper tape 13 which is a connecting member.

Next, a method for manufacturing a connected body of electrical components having the above structure will be explained step by step.

First, as shown in FIG. 2, metal terminals 12a,
12b and 12c are formed. That is, by punching out the metal hoop material 12, the connecting portions 12d, 12e on both sides and the terminals 12a, 12b, 12c provided between the connecting portions 12d, 12e are formed.
and are integrally formed. The terminal is 12
A, 12b, and 12c are made into a set of three, and a plurality of sets are formed in line in the vertical direction of FIG. Note that the holes 12f drilled in the connecting parts 12d and 12e
is provided for automatically feeding the hoop material when punching and forming the terminals 12a, 12b, and 12c.

Next, as shown in FIG. 3, the case 11 is fixed to each set of three terminals 12a, 12b, and 12c. This case 11 has a terminal 1 made of resin.
It is fixed by outsert molding to 2a, 12b, and 12c. This case 11
has a rectangular plane and a recess 11 in the center.
At the right end of the figure, a notch 11c is formed which is continuous with the recess 11a. Then, each terminal 12a, 12 is placed on the bottom surface 11b of the recess 11a.
b and 12c are exposed (see FIG. 5 for the cross-sectional shape of the case 11).

Next, as shown in FIGS. 4 and 5 (cross-sectional view in FIG. 4), the semi-fixed variable resistor 1 is installed in the recess 11a of the case 11. This work begins with each terminal 12 exposed in the recess 11a of the case 11.
a, 12b, 12c and each connection electrode 8a, 8b, 8c of the semi-fixed variable resistor 1 are temporarily fixed with creamy solder 14. After that, the case 11 is passed through a furnace at a predetermined temperature, the solder 14 is melted at the temperature inside the furnace, and the semi-fixed variable resistor 1 is attached to the case 11.
Solder it inside.

Note that the terminals 12a, 12b, 12 are made from the hoop material.
The process from punching out C to passing through the furnace and soldering as described above is performed continuously. During this series of steps, the connecting portions 12d on both sides of the terminals 12a, 12b, 12c,
The terminal 12 is connected to the hole 12f formed in the hole 12e.
This is done while automatically feeding a, 12b, and 12c.

After the above steps up to soldering are completed, the connecting portion 12e and the terminals 12a, 12
The parts b and 12c protruding to the right side of the case 11 are cut to form the state shown in FIGS. 4 and 5.

Furthermore, after that, each terminal 12a, 12b, 12c
Attach paper tape 13, which is a connecting member, to the tip of the
After that, the connecting portion 1 protruding from the paper tape 13
2d is cut and removed, and a connected body of electrical parts shown in FIG. 6 is formed.

Through the above steps, the connected body of electrical parts formed into the state shown in FIG. 6 is supplied as is to the assembly process of various electronic devices.
In this assembly process, the paper tape 13 is loaded into an automatic feeder, and the holes 1 formed in the paper tape 13 are
3a, the fixed portions of the semi-fixed variable resistor 1 are sent out one after another. And the terminals 12a, 12b,
Each case 11 is separated from the connected body shown in FIG. 6 by cutting the left end of the case 12c as shown in the drawing. Then, the terminals 12a,
Hold 12b and 12c and insert them into the mounting holes of the printed circuit board.

In the illustrated embodiment, a semi-fixed variable resistor is used as the small electric component, but other types may be used. Furthermore, in the description of the above embodiment, the paper tape 13 is used as a connecting member in the state shown in FIG. 6, and this paper tape 13 is loaded into an automatic feed mechanism by an automatic feeder.
As another method, the left connecting part 1 of the hoop material 12
2d is used directly as a connecting member instead of this paper tape 13, that is, in a state where the paper tape 13 is not present in FIG. 6 and the connecting portion 12d indicated by the dotted line is provided, it is loaded into an automatic component feeder. It's okay. In this case, the connecting portion 12d is loaded into the feeding mechanism of the automatic feeder, and each case 11 is fed out by the connecting portion 12d. Then, in the automatic feeding machine, the terminals 12a, 12b, 12c are connected to the connecting part 1.
2d to supply the semi-fixed variable resistor 1 on the printed circuit board.

〔effect〕

As described above, according to the present invention, operable electrical components such as small variable resistors, which conventionally could not be automatically supplied to a board, can be handled as a series of multiple sets, and these electrical components can be automatically supplied to circuit boards, etc.

In addition, complete or almost complete electrical components with circuit boards and operating elements pre-assembled are soldered and installed inside the case, so there is no need to change the shape of conventional small electronic components. , it becomes possible to create electrical components that can be automatically supplied as is.

Furthermore, the manufacturing method is simple, for example, by forming multiple sets of metal terminals that are fixed to the case, and simply soldering the operable electrical components to the metal terminals exposed inside the case. Through this process, it is possible to manufacture electrical component assemblies that can be automatically supplied.

[Brief explanation of the drawing]

Fig. 1A is a plan view of a semi-fixed variable resistor which is an example of an electrical component, Fig. 1B is a side view thereof, Fig. 1C is a bottom view thereof, and Figs. 2 and below are diagrams for explaining embodiments of the present invention. Figure 2, Figure 3, Figure 4
The figure is a plan view showing each step of the method for manufacturing a connected body of electrical components according to the present invention, FIG. 5 is a sectional view of FIG. 4,
FIG. 6 is a plan view showing the completed electrical component connection body. 1... Electrical component (semi-fixed variable resistor), 8a,
8b, 8c... Connection electrode, 11... Case, 11
a... recess, 12a, 12b, 12c... terminal,
12d, 12e...Connecting portion, 12d, 12e...
Connection member, 14...Solder.

Claims (1)

[Scope of Claims] 1. A method for manufacturing an electrical component assembly, characterized by comprising the following steps (a) to (c): (a) a connecting portion and a plurality of sets connected to the connecting portion; (b) fixing a resin case to each set of metal terminals and exposing the metal terminals within the case; (c) forming a conductive circuit. An operable electronic component, in which a substrate having a substrate and an operating body for controlling a contact portion to the conductive circuit are pre-assembled, is housed in the case, and the electrode portion of the operable electronic component is exposed in the case. soldering it in contact with the metal terminal;