JP2527411Y2 - Three-terminal electronic components - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an electronic component having a pair of input / output electrodes and a ground electrode.

[Conventional technology]

As shown in FIG. 6, a conventional electronic component of this type, such as a chip-type line filter, has a cubic component body 15.
A pair of input / output electrodes 13 and 13 are formed at both ends of the, and a strip-shaped ground electrode 14 is formed at the center. Examples of equivalent circuits of such a three-terminal electronic component are shown in FIGS.

Such a three-terminal electronic component, as shown in FIG.
It is mounted on the circuit board 10 on which the adhesives 7, 7 have been applied between the electrode lands 8, 9 in advance, and the bottom surface of the component body 15 is adhered with the adhesives 7, 7. FIGS. 6 and 7 show a state in which the adhesives 7 and 7 are temporarily fixed in this manner.
At this time, in order to temporarily fix the component body 15 on the circuit board 10 in a well-balanced manner, the ground electrode on the bottom surface of the component body 15 is required.
It is necessary to adhere the component body 15 to the circuit board 10 at two places between the input / output electrodes 13 and the input / output electrodes 13 and 13. After being temporarily fixed in this manner, the input / output electrodes 13 and 13 and the ground electrode 14 are connected to the electrode lands 8 and 9 on the circuit board 1 by soldering.

[Problems to be solved by the invention]

However, the conventional three-terminal electronic component has the following problems.

First, when the bottom surface of the exterior body 15 is adhered to the circuit board 10 via the adhesives 7, 7, the amount of the adhesive applied and the
It is necessary to delicately adjust the pressure at the time of pressing between the circuit board 15 and the circuit board 10, otherwise, poor soldering of the electrodes 13 and 14 and poor mounting are likely to occur. That is, the application amount of the adhesive 7, 7 is too large, or the component body 15 and the circuit board 10
If the force for pressing the adhesives 7 between them is too strong, the spread of the adhesives 7 is so large that the adhesives 7 reach the electrodes 13 and 14 and the electrode lands 8 and 9. In this case, the adhesives 7 may hinder the connection between the electrodes 13 and 14 and the electrode lands 8 and 9 by soldering. On the other hand, if the applied amount of the adhesives 7, 7 is too small, or if the force for pressing the adhesives 7, 7 between the component body 15 and the circuit board 10 is too weak, the electronic components are securely attached to the circuit board 10. When soldering, the component main body 15 is likely to fall off or shift from the circuit board 10, resulting in mounting failure. .

Second, the three-terminal electronic component is required to have high relative positional accuracy with the electrode lands 8, 9 when mounted on the circuit board 10. Otherwise, the adhesive 7, 7 may be the electrode 13,
14 could not be connected to electrode lands 8 and 9,
Or, the same defects as described above such as short-circuiting of the electrodes 13 and 14 are likely to occur.

Third, if the distance between the input / output electrodes 13 and 13 and the ground electrode 14 is not widened to some extent, when the electrodes 13 and 14 are soldered to the electrode lands 8 and 9, the electrodes 13 and 14 may be short-circuited by solder. Or, it is easily covered with the adhesives 7, 7 so that troubles such as inability to solder can easily occur.

Fourth, the adhesive 7 applied to two places as described above,
7, because the circuit board 10 and the component body 15 are bonded to each other,
At the time of soldering, the solder that has lost a space between the two adhesives 7, 7 pushes up the bottom surface of the component main body 15 due to its thermal expansion, and the component main body 15 is damaged, or the adhesive 7, 7
May be peeled off. For this reason, a defect of the electronic component and a soldering defect are likely to occur.

The present invention has been made in view of the above-mentioned conventional problems, and has as its object to solve these problems.

[Means for solving the problem]

That is, in order to achieve the above object, according to the present invention, an electronic component having a pair of input / output electrodes 4 and 4 and a ground electrode 5 has input / output electrodes 4 and 4 at both ends and a ground at the center. A component body 6 having electrodes 5; a substantially cubic exterior body 1 covering the component body 6; and input / output electrodes over both ends of one surface of the component body 6 over half of the entire width of the component body 6. 4 and 4, the input / output terminals 2, 2 each formed of an L-shaped metal plate led out to one side surface from both ends of the bottom surface of the exterior body, and face the one surface of the component body 6. At the center of the other surface, the metal body is connected to the ground electrode 5 over half of the entire width of the component body 6 and is formed of an L-shaped metal plate led out from the center of the bottom surface of the exterior body 1 to the other side. Ground terminal 3
And a three-terminal electronic component having:

[Action]

In the three-terminal electronic component, L-shaped terminals 2 and 3 protruding from the bottom surface of the exterior body 1 are arranged at three locations on one side surface of both ends of the exterior body and the other side surface side of the central portion. Therefore, when the electronic components are mounted on the circuit board 10, they become like legs, and the bottom surface of the exterior body 1 and the circuit board 10.
An appropriate gap is formed between the sheet and the plate surface. Therefore, when the bottom surface of the exterior body 1 and the plate surface of the circuit board 10 are bonded with the adhesive 7, the force for pressing the adhesive 7 does not become excessive. In addition, since the input / output terminals 2 and 2 are separated from the ground terminal 3, the risk of short-circuiting between them is reduced, and one portion between them may be bonded with the adhesive 7. Further, the input / output terminals 2, which are soldered to the electrode lands 8, 9,
Since the tip of the terminal 2 and the ground terminal 3 are below the bottom surface of the exterior body 1 bonded with the adhesive 7, the adhesive 7 does not reach the terminals 2 and 3.

Further, the input / output terminals 2 and 2 are connected to the input / output electrodes 4 and 4 at both ends of one surface of the component body 6 over a half or more of the entire width of the component body 6, and the ground terminal 3 is The input / output terminals 2 and 2 and the ground terminal 5 are connected to the ground electrode 5 over a half or more of the entire width of the component main body 6 at the center of the other surface opposite to the one surface of the component main body 6. Reference numeral 3 denotes that the input / output electrodes 4, 4 and the ground electrode 5 are connected such that the component main body 6 is sandwiched by more than half of the entire width between both ends and the center of two opposing surfaces of the component main body 6. . Therefore, as shown in FIG. 4, both ends of the component body are formed by lead terminals 2 ', 2' and lead terminals 3 'cut and raised from a pair of parallel frames 12, 12' connected in a ladder shape. In addition, the lead terminals 2 ′, 2 ′, 3 ′ can be connected to the input / output electrodes 4, 4 and the ground electrode 5 by soldering or the like, with the center part sandwiched between both sides in a well-balanced manner. Thereafter, the lead terminals 2 ', 2', 3 'are simply cut off from the frames 12, 12', respectively, and the mounting of the input / output terminals 2, 2 and the ground terminal 3 to the component body 6 is completed. Accordingly, a large number of component bodies 6 can be stably sandwiched along the series of frames 12, 12 ', and the input / output terminals 2, 2 and the ground terminal 3 can be attached, so that high productivity can be obtained.

〔Example〕

Next, embodiments of the present invention will be described in detail with reference to the drawings.

As shown in FIGS. 2 and 3, the component body 6 is substantially the same as the above-described conventional chip-shaped electronic component. That is, the component body 6 has a substantially cubic shape, input / output electrodes 4 and 4 are formed at both ends, and a ground electrode 5 is formed at the center.

Input / output terminals 2 and 2 and a ground terminal 3 formed by bending an elongated plate-like metal plate into a crank shape are prepared.
The middle part of the two long input / output terminals 2, 2 is attached to one side surface of the component body 6, and the upper piece is the both ends on the upper surface side of the component body 6 in FIGS. And connected to the input / output electrodes 4 and 4 there. The lower ends of the input / output terminals 2 and 2 are
, And a lower end portion thereof is bent outward at right angles in an L-shape. On the other hand,
The short terminal of the ground terminal 3 is shown in FIGS.
In the figure, it is applied to the central portion on the lower surface side of the component main body 6, where it is connected to the ground electrode 5, and its lower end extends along the extension surface of the other side surface of the component main body 6, and also has an L-shaped outward shape. It is bent.

When the input / output terminals 2 and 2 and the ground terminal 3 are attached to the component body 6 in this manner, for example, a lead frame as shown in FIG. 4 may be used. In this lead frame, a pair of parallel frames 12, 12 'are connected to lead terminals 2', 2 ', 3' according to the distance between the input / output electrodes 4, 4 of the component body 6 and the ground electrode 5. It is connected to the bar 11 in a ladder shape. Here, lead terminals 2 ', 2' connecting the pair of frames 12, 12 'in a ladder shape.
3 'and the connecting bar 11 are arranged in the order of the lead terminal 2', the lead terminal 3 ', the lead terminal 2', and the connecting bar 11.

The lead terminals 2 ', 2' of the lead frame are cut off from the frame 12 'side, and the frame 12 side is bent in a crank shape, and the cut ends are raised from the frames 12, 12'. . The lead terminal 3 'is cut off from the frame 12 side,
The 12 'side is bent into a crank shape, and the cut end is raised from the frames 12, 12'. In this state, there is a difference in the height direction between the leading ends of the lead terminals 2 ', 2' and the lead terminal 3 ', which is about the thickness of the component body 6 (the vertical dimension in FIG. 2). . In this manner, the lead terminals 2 ', 2', 3 'are connected to the frames 12, 12', respectively.
, The frames 12, 12 'remain connected by the connecting bar 11 adjacent to the lead terminals 2', 2 '.

The component body 6 as described above is sandwiched between the lead terminals 2 ', 2' and the tip of the lead terminal 3 ', and the tips of the lead terminals 2', 2 'are held at both ends of the upper surface of the component body 6. ,
The input / output electrodes 4, 4 are applied to almost the entire width of the component main body 6.
The lead terminal 3 'is applied to the ground electrode 5 over a length exceeding half of the full width of
Solder to Thereafter, the lead terminals 2 'and 2' are cut off from the frame 12 side and the lead terminals 3 'are cut and separated from the frame 12' side, thereby separating the input / output terminals 2 and 2 and the ground terminal as shown in FIG. Component body 6 having 3
Is assembled.

Thereafter, as shown in FIGS. 1 to 3, the component body 6 is covered with an exterior body 1 formed of an insulating resin or the like. The exterior body 1 has a substantially cubic shape,
The input / output terminals 2,
The lower end of the ground terminal 3 is led out from the bottom of the central portion near the other side surface. The lengths of the lower ends of the L-shaped terminals 2, 2, and 3 derived from the outer package 1, that is, the heights of the lower ends thereof from the bottom surface of the outer package 1, are all set to be substantially the same.

Further, FIGS. 1 and 3 show a state in which the three-terminal electronic component thus completed is mounted on the circuit board 10, which is a state before the tips of the terminals 2, 3 are soldered. As is clear from these drawings, electrode lands 8, 8, and 9 are formed on the circuit board 10 in accordance with the positions of the input / output terminals 2 and 2 and the ground terminal 3, respectively. The bottom surface of the exterior body 1 is attached to the circuit board 10 with the applied adhesive 7.
Glue to In this bonded state, the tips of the input / output terminals 2 and 2 and the ground terminal 3 are located on the electrode lands 8, 8 and 9, respectively, and are connected thereto by soldering. Thereby, the electronic component is mounted on the circuit board 10 and connected to the circuit.

[Effect of the invention]

As described above, according to the present invention, the adhesive for temporarily fixing the electronic component to the circuit board is unlikely to hinder the soldering, the electrodes are not easily short-circuited, and the electronic component is not easily damaged. Therefore, it is possible to provide a three-terminal electronic component that can be securely mounted on the circuit board and connected, and the distance between the terminals can be reduced to some extent. Further, such a three-terminal electronic component allows terminals to be simultaneously and easily attached to a large number of component bodies, and high productivity can be obtained in an assembly process of the component body and the terminals.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an appearance of an embodiment of the present invention in which a three-terminal electronic component is temporarily fixed to a circuit board, FIG. 2 is a perspective view showing the exterior of the electronic component, and FIG. FIG. 4 is a vertical sectional side view of the electronic component temporarily fixed to a circuit board. FIG. 4 is a perspective view of an essential part showing an example of a frame lead used for manufacturing the electronic component. ) To (b) are connection diagrams showing examples of equivalent circuits of the three-terminal electronic component, and FIG.
FIG. 7 is a perspective view showing an appearance of a conventional example in which a three-terminal electronic component is temporarily fixed to a circuit board, and FIG. 7 is a side view showing the same state. DESCRIPTION OF SYMBOLS 1 ... exterior body, 2 ... input / output terminal, 3 ... ground terminal, 4 ... input / output electrode, 5 ... ground electrode, 6 ... component body

Claims (1)

(57) [Scope of request for utility model registration] An electronic component having a pair of input / output electrodes (4) and (4) and a ground electrode (5), wherein the electronic component has input / output electrodes (4) and (4) at both ends and a central portion. A component body (6) having a ground electrode (5) thereon, and a substantially cubic exterior body (1) covering the component body (6).
And input / output electrodes (4) at both ends of one surface of the component body (6) over half or more of the entire width of the component body (6).
The input / output terminals (2) and (2), which are connected to (4) and are led to one side surface from both ends of the bottom surface of the exterior body, and are made of an L-shaped metal plate; At the center of the other surface facing the one surface, the ground electrode (5) is connected to the ground electrode (5) over half or more of the entire width of the component body (6), and from the center of the bottom surface of the exterior body (1) to the other side surface. And a ground terminal (3) formed of an L-shaped metal plate led out to the side.