JPH04125401U - Electrical component terminal mounting structure - Google Patents

Abstract

(57) [Summary] [Purpose] To increase the mounting strength of the terminal by ensuring that the terminal is securely fixed to the insulating substrate before soldering and by ensuring a sufficient amount of solder adhesion. [Structure] Insertion piece 1 inserted into through hole 8 of insulating substrate 7
3 and an extension piece 14 disposed opposite to the outer surface of the insulating substrate 7 are used. Terminal 11
were caulked to the insulating substrate 7, and the bent ends were connected to the conductor 9 provided near the through hole 8 on the insulating substrate 7 by soldering.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to the mounting structure of terminals in electrical components such as variable resistors, and is particularly applicable to small The present invention relates to a terminal attachment structure suitable for attaching minute terminals to a type of insulating substrate.

0002

[Conventional technology]

Conventionally, the terminal attached to a small insulating board is as shown in Figure 6. It was widely known. Terminal 1 shown in the figure is made by pressing a thin metal plate. , insert the insertion piece 3 extending from the main flat plate part 2 into the through hole of the insulating substrate of the variable resistor, etc. , a conductor such as a silver electrode provided near the through hole on the insulating substrate and the tip of the insertion piece 3 The terminal 1 is connected and fixed by soldering. Note that the connection end 4 hanging down from the main flat plate 2 is soldered to a printed wiring board, etc. Both sides of the base end of this connection end 4, that is, the lower end of the main flat plate part 2. The surface 2a functions as a positioning stopper.

0003 However, when such a terminal 1 is soldered only at the tip of the insertion piece 3, Because of this, the installation strength is weak, and a jig must be used to temporarily fix it during soldering. There was also the complexity of having to do so.

0004 On the other hand, the terminal mounting structure disclosed in Japanese Utility Model Publication No. 56-29899 is As shown in FIG. 6 is used, which improves the mounting strength compared to the conventional example, and allows the use of jigs. Temporary fixation is also no longer necessary. That is, as shown in FIG. 8, this terminal 6 By inserting it into the through hole 8 of the insulating substrate 7, the insertion piece 3 and the extension piece 5 It is automatically temporarily fixed by sandwiching the plate 7, and each tip of the insertion piece 3 and the extension piece 5 and the conductor 9 on the insulating substrate 7 can be bonded with solder 10. The reliability of soldering is higher than that of the conventional example.

[0005]

[Problem that the idea aims to solve]

By the way, the conventional structure shown in FIGS. The clamping force itself is not very strong, so the mounting strength is determined by the solder 10. Although it depends largely on the adhesive strength, it is possible to press a hoop-shaped thin metal plate and shape it. Since the terminal 6 to be formed has poor solder wettability on the tip surface 6a, it is not always necessary to use a sufficient amount of solder. It was not possible to attach the solder 10. In other words, the solder wettability of terminal 6 is In order to ensure this, the hoop material is subjected to surface treatment such as soldering in advance, but Since the end surface 6a is a cut surface after this surface treatment, it is difficult for the solder 10 to adhere to it. Particularly when the terminal 6 is minute, the mounting strength is inevitably insufficient.

[0006] This invention was devised in view of these circumstances, and its purpose is to improve the installation strength of terminals. It is an object of the present invention to provide a terminal mounting structure for electrical components with improved quality.

[0007]

[Means to solve the problem]

The object of the present invention described above is to provide an insertion piece that is inserted into a through hole of an insulating substrate, and a Using a terminal with an extension piece arranged opposite to the outer surface of the plate, the insertion piece and By bending each tip of the extension piece and crimping the terminal onto the insulating board. Both of these bent ends and the conductor provided near the through hole on the insulating substrate This is accomplished by soldering and connecting.

[0008]

[Effect]

According to the above method, before soldering, each end of the terminal insertion piece and extension piece is The terminal can be securely attached to the insulating board by crimping by bending the end. Also, these insertion pieces and extension pieces are bent and laid down so that the solder is not attached. Therefore, a sufficient amount of solder can always be secured.

[0009]

【Example】

Hereinafter, embodiments of the present invention will be described based on the drawings.

0010 Figure 1 shows a variable resistor according to an embodiment of the present invention with terminals permanently fixed to the insulating substrate. 2 is a cross-sectional view taken along the line A-A in FIG. 1, and FIG. Figure 4, a process diagram for fixing, shows the terminal temporarily fixed to the insulating board in the same example. Fig. 1 is a perspective view of the main parts, and in order to avoid complexity, solder is omitted in Fig. 1, and Figs. 4, the resistor and silver electrode are not shown.

[0011] The terminal 11 shown in these figures is formed by pressing a hoop-shaped thin metal plate. , and is separated from the hoop material at the final stage of the variable resistor assembly process. This terminal 1 From the main flat plate part 12 of 1, it stands up along a plane substantially perpendicular to the main flat plate part 12. A narrow insertion piece 13 that is closed, and a shape that is approximately perpendicular to the main flat plate portion 12 and the insertion piece 13. A slightly wide extension piece 14 stands up along a flat plane, and extends from the insertion piece 1. 3 into the through hole 8 of the insulating substrate 7, the extension piece 14 will touch the outer surface of the insulating substrate 7. They are placed in opposing positions. Note that, as described later, if the terminal 11 is disconnected, At the stage of temporary fixing to the edge board 7, the tips of the insertion piece 13 and the extension piece 14 are Both pieces 13 and 14 in the manufactured variable resistor are bent inward. The shape of both is hook-shaped. In addition, this variable resistor has a main flat plate portion 1 of the terminal 11. 2 to a printed wiring board (not shown). It is mounted standing up against the board.

0012 Next, the procedure for attaching the terminal 11 to the insulating substrate 7 will be described in detail.

[0013] First, a pair of left and right terminals 11 and a middle terminal are formed on the same hoop-shaped thin metal plate. These terminals are arranged so that the center terminals 15 are respectively arranged at predetermined positions on the insulating substrate 7. The insulating substrate 7 is mounted on the groups 11 and 15 (FIG. 1 and FIGS. 3(a) and 3(b)). reference). In addition, in this type of variable resistor, the commonly known terminals 1 and 3 are a pair of left and right terminals 1. 1. The terminal 15, commonly known as 2 terminal, is the central terminal 15, and there is a conductive pattern on the insulating substrate 7 in advance. A silver electrode 9 and a resistor 16 are formed. Next, the through hole of the insulating substrate 7 8. Bend the tips of the insertion pieces 13 of each terminal 11 inserted into the terminals 8 in opposite directions. (see FIGS. 1 and 3(c)), and is further arranged opposite to the outer surface of the insulating substrate 7. Also bend the tip of the extension piece 14 of each terminal 11 toward the silver electrode 9 (see FIGS. (see FIG. 3(d)), the crimping process involves bending the tips of both pieces 13 and 14. Thus, each terminal 11 is temporarily fixed to the insulating substrate 7 (see FIG. 4). After that, insert the insertion piece 13 and the tip of the extension piece 14 and the silver electrode 9 using solder 10. By attaching, each terminal 11 is permanently fixed to the insulating substrate 7 and electrically and mechanically complete the connection (see Figure 2). Then, other components such as sliders are incorporated. The variable resistor manufactured by separating the terminals 11 and 15 from the hoop material is Insert the main flat plate part 12 of the child 11 into a through hole of a printed wiring board (not shown) and solder it. At this time, the outer surface 14a of the proximal end of the extension piece 14 is , as a stopper that defines the height position of the insulating substrate 7 with respect to the printed wiring board. Function.

[0014] In this way, in the above embodiment, before soldering the terminal 11, the insertion piece 13 and Since each tip of the extension piece 14 is bent and caulked, the terminal 11 is It can be reliably attached to the insulating substrate 7. Moreover, these insertion pieces 13 and Since the extension piece 14 is bent and laid down, the solder 10 will be attached to it. , it is possible to always ensure a sufficient amount of solder adhesion. Therefore, the terminal in the above embodiment The mounting strength of terminal 11 is extremely high, and even when a strong external force such as an impact is applied, the terminal 11 remains intact. It is less likely to break or fall off.

[0015] In addition, in the above embodiment, the tips of the insertion pieces 13 of the pair of left and right terminals 11 are placed in opposite directions. Since it is bent in the direction of the Misalignment of the center of the substrate 7 can be prevented. In other words, both terminals are supported by the hoop material. 11 to the insulating substrate 7, the center position of the insulating substrate 7 is automatically determined. Therefore, the sensor of the insulating substrate 7 due to the clearance between the through hole 8 and the insertion piece 13 There will be no misalignment.

[0016] Furthermore, in the above embodiment, the stop on the outer surface 14a of the extension piece 14 of the terminal 11 is The height position of the insulating board 7 relative to the printed wiring board can be determined by the par function. Therefore, it is not necessary to cut out an end surface for a stopper in the main flat plate portion 12 of the terminal 11. Therefore, even if the terminal 11 is minute, it can be easily accommodated. In other words , when a minute terminal 11 is required as the insulating substrate 7 becomes smaller, the main flat plate part 12 The stopper structure, in which the end surface of the However, it is difficult to adopt the outer surface 14a of the extension piece 14 as in the above embodiment. There is no problem if it is made at par, and as a result, miniaturization of the variable resistor can be promoted.

[0017] In addition, in the case of the above embodiment, the height position of the insulating substrate 7 with respect to the printed wiring board is Although it is not very large, as shown in FIG. 12 is set at an appropriate non-right angle, and the extension piece 14 is slightly longer. By forming the reference plane B corresponding to the printed wiring board and the insulating substrate 7 It is also possible to increase the distance between

[0018]

[Effect of the idea]

As explained above, the present invention bends each end of the terminal insertion piece and extension piece. crimp the terminal onto the insulating board, and solder these insertion pieces and extension pieces. Since the amount of solder adhered to the terminal is sufficient, the installation strength of the terminal is increased. It is possible to provide a terminal mounting structure with extremely high reliability.

[Brief explanation of drawings]

FIG. 1 is a plan view showing a state in which terminals are permanently fixed to an insulating substrate of a variable resistor according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along line AA in FIG. 1;

FIG. 3 is a process diagram up to temporary fixing of terminals in the same embodiment.

FIG. 4 is a perspective view of essential parts showing a state in which terminals are temporarily fixed to an insulating substrate in the same embodiment.

FIG. 5 is a sectional view for explaining another embodiment of the present invention.

FIG. 6 is a perspective view of a terminal according to a conventional example.

FIG. 7 is a perspective view of a terminal according to another conventional example.

8 is a cross-sectional view for explaining a conventional terminal mounting structure using the terminal shown in FIG. 7. FIG.

[Explanation of symbols]

7 Insulating substrate 8 Through hole 9 Silver electrode (conductor) 10 Solder 11 Terminal 12 Main plate part 13 Insertion piece 14 Extension piece

Claims (1)

[Scope of utility model registration request] 1. An electrical component in which a part of a terminal made of a thin metal plate is inserted into a through hole in an insulating substrate, and the terminal is connected by soldering to a conductor provided near the through hole in the insulating substrate. In the terminal mounting structure, a terminal is provided in which an insertion piece that is inserted into the through hole and an extension piece that is arranged opposite to the outer surface of the insulating substrate are extended, and each of the insertion piece and the extension piece is extended. 1. A terminal mounting structure for an electrical component, characterized in that the terminals are each bent and the terminals are caulked to the insulating substrate, and the bent tips are soldered as described above.