JP2541281Y2 - Mounting assembly for circuit board and electronic component body - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The invention relates to electronic components such as resistors, capacitors,
The present invention relates to a convenient mounting assembly of a circuit board and an electronic component body before a semiconductor element or an electronic jumper wire is mounted on an electrode land of a circuit board.

[Conventional technology]

The attachment of the electronic component in the conventional example will be described with reference to FIGS.

FIG. 7 is an explanatory view of mounting a rectangular electronic component in a conventional example. In FIG. 7, the rectangular electronic component body 31 has rectangular cap electrodes 32 connected to both ends. Also, the circuit board
An electrode land 41 which forms a part of a wiring pattern (not shown) is formed on 40, and a rectangular electronic component 31 'is mounted on the electrode land 41 by an automatic assembling machine. And when flow or reflow soldering is performed,
The square cap electrode 32 and the electrode land 41 are mechanically and electrically connected by the solder.

FIGS. 8A and 8B are explanatory views of a square cap electrode in a conventional example.

The plate 34 having the shape as shown in FIG. 8 (a) is narrowed down several times by a square mold. After that, the open end
As shown in FIG. 8 (b), the rectangular cap electrode 32 is trimmed. Then, the square electronic component body 31 (see FIG. 7) is inserted from the open portion 33 of the square cap electrode 32, and the square electronic component body 31 falls off the square cap electrode 32 due to friction between them. Connected mechanically and electrically.

However, the square cap electrode 32 has a problem that the cost is high because it is necessary to perform a multi-stage aperture on a portion having a small shape. Also, if there is a slight variation in the machining accuracy of the square cap electrode 32, the square electronic component body 31
However, there is a drawback that some of them are difficult to insert or easily fall off.

FIGS. 9 (a) and 9 (b) are explanatory views of another rectangular cap electrode in the conventional example. The one shown in FIG. 9 is conceived in order to eliminate the above-mentioned disadvantage, and FIG.
After forming the cross plate 35 as shown, the cross plate 35
The contact portion 36 is formed at a right angle in accordance with the dotted line in FIG. 9 to form a square cap electrode 32 'as shown in FIG. In this case, when the thickness of the cross plate 35 is reduced, the frictional force between the square electronic component body 31 and the square cap electrode 32 'is weak, and not only the electrical connection between them is weak, but also the mechanical strength is low. Is also weak. Conversely, when the thickness of the cross plate 35 is increased, the strength of the square cap electrode 32 'and the frictional force between the square electronic component body 31 and the square cap electrode 32' increase, but the material and processing There is a problem that the cost is high.

FIGS. 10 (a) and 10 (b) are explanatory diagrams of another rectangular cap electrode in the conventional example.

This conventional example is designed to further increase the mounting strength between the rectangular electronic component body 31 and the rectangular cap electrode 32 'shown in FIG. 9 and reduce the processing cost.

That is, the cruciform plate 35 is pressed by a mold (not shown) as a shape having the meat portions 38 at the four corners, and the rectangular cap electrode is shaped as shown in FIG.
32 ″. The square cap electrode 3 thus made
2 "is formed with a contact portion 39 which is in contact with an adjacent surface close to the open portion 33, and a continuous throttle portion 39 'is formed at a portion closer to the bottom than the open portion 33.

The diaphragm 39 'shown in FIG. 10 (b) is a square cap electrode.
Depending on the cross-sectional area of the square cap electrode 32 ", when the side of the square cap electrode 32" is about 1/2 to 1/3 of one side, the square cap electrode 32 "can be narrowed down by one pressing of the mold. Can be

[Problems to be solved by the invention]

A square electronic component has better stability when installed on a substrate and has a larger area in contact with an electrode land than a round electronic component.

However, when the square electronic component or the round electronic component is further miniaturized, the area in contact with the electrode land of the cap electrode becomes smaller. Therefore, there is a problem that the electric resistance between the electronic component and the electrode land increases.

Further, when the axial lead type electronic component is miniaturized in the same manner as described above, the area of the welded portion between the cap electrode and the lead wire is reduced, and there is a problem in reliability in this portion.

In addition, when the electronic component is miniaturized, the contact area with the electrode land also becomes small, and there is a problem in mechanical and electrical mounting strength.

The present invention is intended to solve the above-described problems, and can be used for chip-type electronic components, has a small electric resistance between an electronic component body and an electrode land of a circuit board, and has a strong mechanical mounting strength. An object of the present invention is to provide a mounting assembly of a circuit board and an electronic component body.

The present invention increases the contact area when mounting on the electrode lands of a circuit board compared to a round-shaped one, and provides good stability when mounted and high mounting strength. An object of the present invention is to provide a mounting assembly with a body.

[Means for solving the problem]

In order to achieve the above object, a mounting assembly for a circuit board and an electronic component body according to the present invention has an electronic component body: a bottom portion at one end and an open portion at the other end. A bottomed cylinder having a square cross section connected to both ends, an opening formed in a part of the bottom of the bottomed cylinder, and a throttle formed on the bottom side of the bottomed cylinder, A notch formed at a corner on the open side of the bottomed cylindrical body;
A circuit board having a wiring pattern and land electrodes formed on an insulating substrate: mechanically and electrically connecting the electronic component body and the electrode lands of the circuit board via an opening, a notch, and a bottom of the cap electrode. Solder connected to:
And characterized by the following.

The mounting assembly of the present invention for mounting a circuit board and an electronic component body includes a guide plate extending a pair of opposing pieces of the cylindrical body.

[Action]

When the electronic component body is inserted into the cap electrode, the electronic component body and the cap electrode are mechanically and electrically connected to each other by the resiliency of each piece formed in the cutout portion of the cap electrode. Since the spring property of each piece of the cap electrode can be appropriately controlled by the length of the narrowed portion, highly reliable mounting can be performed.

In addition, since the opening is provided at the bottom of the cap electrode, when the cap electrode is placed on the electrode land of the circuit board, the solder is removed from the electronic component body through the opening of the cap electrode and the bottom. To the end. Furthermore, the connection between the electrode lands of the circuit board and the electronic component body is further improved because the solder enters through the notch formed by cutting the contact portion provided in the open portion from the narrowed portion of the cap electrode. Be firm.

The connection structure with the opening, the bottom, and the notch,
Suitable for control circuits used in places with severe vibration and heat cycles. In addition, the connection structure has a high attachment strength and a high electrical connection, so that the electric resistance between the electronic component body and the electrode lands on the circuit board is reduced.

Further, a guide plate can be provided so that the automatic assembly machine can easily perform the insertion of the electronic component body into the cap electrode. Further, the cutout portion provided from the narrowed portion to the open portion of the cylindrical cap electrode formed into a square cross section facilitates insertion of the electronic component body into the cap electrode and is brittle like a multilayer ceramic capacitor. When inserting the square component into the cap electrode, the corner of the electronic component body is not chipped.

〔Example〕

FIG. 1, FIG. 2, and FIG. 5 are views for explaining a reference example of the present invention.

FIG. 3, FIG. 4 and FIG. 6 are views for explaining an embodiment of the present invention.

An embodiment of the present invention and a reference example will be described with reference to FIGS. 1 to 6.

FIG. 1 is a perspective view of a square cap electrode according to a reference example of the present invention, in which an opening 4 is formed in a portion corresponding to the bottom 2 from a cross plate like the conventional example shown in FIG.

Then, the bottom portion 2 is pressed by a mold (not shown) to form a throttle portion 6 on the bottom portion 2 side of the rectangular cylindrical body 9 and a contact portion 7 on the opening portion 3 side as shown in FIG. Thus, a rectangular cap electrode 1 is obtained.

The square electronic component 10 ′ is completed by inserting the square cap electrode 1 manufactured as described above into the end of the square electronic component body 10. The resiliency of each piece of the square cap electrode 1 can be changed by controlling the length of the aperture 6 of the square cap electrode 1. The square cap electrode 1 can be applied to an electronic component such as an axial lead type or a radial lead type in addition to the chip component.

FIG. 2 is an explanatory view showing a case where a lead wire is attached to the square cap electrode in the reference example of the present invention.

A swelling portion is formed in advance at the end 8 ′ of the lead wire 8, and after the lead wire 8 is inserted from the open portion 3 side of the square cap electrode 1, the swelling portion and the square cap Electrode 1
And caulking.

FIG. 3 is a view for explaining a mounting assembly of a circuit board and an electronic component body according to an embodiment of the present invention.

In FIG. 3, an electrode land 11 is formed on a circuit board 13 so as to be connected to a wiring pattern (not shown). The square electronic component 10 'is connected to the electrode land.
11, for example, is placed via creamy solder 12.

Thereafter, when reflow processing is performed, the square electronic component body 10
And the electrode land 11, the opening 4 of the rectangular cap electrode, the notch 27, the side surface (not shown) of the rectangular cap electrode,
And via the bottom 2 a mechanical and electrical connection by means of solder 12. Also, since the height of the square cap electrode 1 is usually 1 mm to several mm, due to the surface tension of the solder 12, the solder 12 passes through the bottom 2 and the opening 4 of the square cap electrode 1 to form the square cap electrode 1. Get inside. As a result, the solder 12 connects the electrode land 11, the square cap electrode 1, and the square electronic component body 10, and lowers the resistance of the connection portion and increases the mounting strength as compared with the case where the opening 4 is not provided. .

FIGS. 4A and 4B are explanatory views of another embodiment of the present invention.

In FIG. 4 (a), the illustrated square cap electrode 1 is shown.
In the figure, one of the opposing pieces of the rectangular cylindrical body 9 is extended as shown in the figure, and a guide plate 21 is formed.

Further, in FIG. 4 (b), the illustrated rectangular cap electrode 1 is provided with a guide plate 22 in which one of the opposing pieces of the rectangular cylindrical body 9 is tapered outward in an extended portion as shown in the figure. I have.

Therefore, when the rectangular electronic component body 10 is inserted into the rectangular cap electrode 1 by automatic assembly or the like (not shown), the guides 21 and 22 facilitate the entrance of the rectangular electronic component body 10 and It is fixed by its spring property.

5 (a) and 5 (b) are views for explaining a reference example in the present invention. In FIGS. 5 (a) and 5 (b), the rectangular cap electrode 1 shown in the drawing has a convex portion formed on each piece of the rectangular cylinder 9. That is, the one shown in FIG. 5 (a) forms the concave portion 23 from the outside to the inside of the rectangular cap electrode 1. As a result, the square cap electrode 1
A convex portion 24 is formed in the inside, and when the square electronic component body 10 is inserted into the square cap electrode 1, the above-mentioned portion cuts into the square electronic component body 10 to mechanically and electrically connect the two. Strengthen the connection. Similarly, the one shown in FIG.
A linear concave portion 25 and a linear convex portion 26 are formed, and these portions bite into the rectangular electronic component body 10.

FIGS. 6A to 6C are explanatory views of another embodiment of the present invention. As shown in FIG. 6 (a), a cutout 27 is formed in the square cap electrode 1 by cutting out the contact portion 7 with which each piece of the rectangular cylindrical body 9 is in contact. Then, as shown in FIG. 6 (b), the rectangular electronic component body 10 is inserted into the rectangular cap electrode 1. When the rectangular electronic component body 10 is easily chipped, for example, as in a multilayer ceramic capacitor, the cutout portion 27 is prevented from contacting with the square cap electrode 1 so that the rectangular electronic component body 10 is not chipped. Is prevented.

As shown in FIG. 6C, when the square cap electrode 1 is connected to the circuit board 13, the solder enters the square electronic component body 10 through the notch 27. The mechanical and electrical connections are stronger. At this time, the solder enters through the bottom 2 and the opening 4 of the square cap electrode 1 and the electrode land 11 and the square electronic component element body.
10 is connected.

The embodiments of the present invention have been described in detail, but the present invention is not limited to the above embodiments. Various design changes can be made without departing from the present invention described in the claims for utility model registration.

In the reference example shown in FIG. 1, the opening is circular, but arbitrarily sized or shaped is a problem in designing the square cap electrode. For example, the opening may have a similar shape such as an ellipse, an ellipse, a slit, a triangle, and a square.

Further, in the reference example shown in FIG. 5, the convex portion is shown as having a circular shape and a linear shape, but the same shape as described above is optional.

Further, in the embodiment shown in FIG. 6, the shape of the notch can be arbitrarily changed in consideration of the elasticity and the contact area of each piece of the square cap electrode.

Further, in the embodiment of the present invention, the square electronic component has been described, but it goes without saying that the present invention can be similarly applied to a round electronic component.

[Effect of the invention]

According to the present invention, by appropriately controlling the lengths of the constricted portion and the cutout portion of the cap electrode formed of a cylindrical body having a square cross section, the electronic component body and the cap are formed by the spring property of each piece of the cap electrode. The reliability of the mechanical and electrical connection with the electrodes is increased.

According to the present invention, the notch provided at the corner of the cap electrode formed of a cylindrical body having a square cross section facilitates the solder to enter the electronic component body.

According to the present invention, the electronic component body and the land electrode of the circuit board are directly connected to each other through the opening of the cap electrode and the cutout at the corner, so that the mounting strength of both can be increased.

According to the present invention, the notch provided at the corner of the cap electrode prevents a fragile square component such as a multilayer ceramic capacitor from being lost at the corner when the component is inserted into the cap electrode.

According to the present invention, at least one guide plate is provided on the cap electrode, so that the electronic component body can be easily inserted.

[Brief description of the drawings]

FIG. 1 is a perspective view of a square cap electrode according to a reference example of the present invention, FIG. 2 is an explanatory view of a square cap electrode according to a reference example of the present invention in which a lead wire is attached, and FIG. FIGS. 4 (a) and 4 (b) are views for explaining a mounting assembly of a circuit board and an electronic component element as an example, FIGS. 4 (a) and 4 (b) are explanatory views of another embodiment of the present invention, FIGS. (B) is a diagram for explaining a reference example in the present invention, FIGS. 6 (a) to (c) are explanatory diagrams of another embodiment in the present invention, and FIG. FIGS. 8 (a) and 8 (b) are explanatory diagrams of a square cap electrode in a conventional example, and FIGS. 9 (a) and 9 (b) are explanatory diagrams of another rectangular cap electrode in a conventional example, and FIGS. (A) and (b) are explanatory diagrams of another rectangular cap electrode in the conventional example. DESCRIPTION OF SYMBOLS 1 ... Square-shaped cap electrode 2 ... Bottom 3 ... Open part 4 ... Opening 5 ... Open end 6 ... Narrow part 7 ... Contact part 8 ... Lead wire 9 ... Square cylinder 10 …… Square electronic component element body 11 …… Electrode land 12 …… Solder 13 …… Circuit board

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Takeshi Doi 6-16-20 Ueno, Taito-ku, Tokyo Taiyo Yuden Co., Ltd. (56) References JP-A-1-144610 (JP, A) Shokai 62 -37913 (JP, U) Japanese Utility Model Showa 50-75058 (JP, U) Japanese Utility Model Showa 62-92605 (JP, U) Japanese Utility Model Showa 44-12532 (JP, Y1) Japanese Utility Model Utility Model Showa 38-17839 (JP, Y1) )

Claims (2)

(57) [Scope of request for utility model registration] 1. An electronic component element body: a bottomed cylindrical element having a bottom 2 at one end and an open portion 3 at the other end, and having a rectangular cross section connected to both ends of the electronic component element; Opening 4 formed in part of bottom 2 in the bottom cylinder
A throttle part 6 formed on the bottom part 2 side of the bottomed cylindrical body; and a notch part 27 formed on a corner of the bottomed cylindrical body on the side of the open part 3.
And a cap electrode comprising: a wiring pattern and a land electrode formed on an insulating substrate
Circuit board 13 having 11: the electronic component body and the electrode lands 11 of the circuit board 13 are connected to the opening 4, the cutout 27, the side surface, and the bottom 2 of the cap electrode.
And a solder 12 that is mechanically and electrically connected to the circuit board and the electronic component body. 2. A guide plate in which a pair of opposed pieces of the cylindrical body are extended.
The mounting assembly according to claim 1, further comprising: 21.