JPH11251712A - Electronic component mounting structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic component mounting structure which can prevent the erroneous insertion of electronic component having polarities. SOLUTION: An electronic component mounting structure is constituted in such a way that each lead 12 of electronic parts 10 composed of a main body 11 and a plurality of leads 12 and 13 which are extended in parallel with each other from the main body 11, has polarities, and is inserted into and soldered to the corresponding fitting holes 14a and 14b of a printed board 14 when the component 10 are mounted on the wiring board 14. The lead 12 has a bent section 12a for preventing erroneous insertion in the middle, and the fitting hole 14a of the board 14 corresponding to the lead 12 is formed to pass the bent section 12a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure for an electronic component having a polarity, such as a resistor or a capacitor.

[0002]

2. Description of the Related Art Conventionally, a polar electronic component is configured as shown in FIG. That is, in FIG. 6, the electronic component 1 includes a main body 2 and two leads 3 and 4 extending from the main body in parallel with each other. These leads 3 and 4 are mounted on a printed circuit board 5 for mounting.
Are inserted into the mounting holes 5a and 5b provided in the printed circuit board 5 and soldered, so that they are electrically connected to a conductive pattern (not shown) formed on the lower surface of the printed circuit board 5. ing. In the case shown in the figure, the leads 3 and 4 are provided with bending portions 3a and 4a for positioning in the middle thereof, and the bent portions 3a and 4a come into contact with the upper surface of the printed circuit board 5 as shown in FIG. So, electronic components 1
Can be held at a predetermined height with respect to the printed circuit board 5.

Here, the two leads 3 and 4 have polarities, and must be mounted in a correct orientation on a printed circuit board 5 for mounting during mounting. For this reason, the electronic component 1 has a polarity mark (not shown) attached to its main body 2 by printing or the like. At the time of mounting, the polarity mark and the polarity mark provided on the surface of the printed circuit board 5 are visually observed. , So that the mounting can be performed in the correct orientation.

[0004]

However, in the electronic component 1 described above, the polarity mark attached to the main body 2 may be shifted from the leads 3 and 4 by, for example, about ± 90%. As shown in FIG. 8, the printed circuit board 5 may be mounted in the opposite direction. Also, the electronic component 1 is inserted into the printed circuit board
However, there is a problem that mounting in the opposite direction actually occurs even when the camera is mounted on the camera. Further, if an operation test of an electronic circuit or an electronic device incorporating the electronic component is performed while the electronic component is mounted in the opposite direction, in some cases, not only the electronic component but also other electronic components or electronic circuits may be used. However, there is a problem that electronic devices may be damaged.

SUMMARY OF THE INVENTION In view of the above, it is an object of the present invention to provide a mounting structure for an electronic component which prevents erroneous insertion of a polar electronic component.

[0006]

SUMMARY OF THE INVENTION According to the present invention, there is provided, in accordance with the present invention, a main body and a plurality of leads extending parallel to each other from the main body. For electronic components to be inserted and soldered into the corresponding mounting holes of the printed circuit board during mounting, one side of the lead has a bent portion for preventing incorrect insertion in the middle, and mounting of the printed circuit board corresponding to the lead This is achieved by an electronic component mounting structure, wherein the hole is formed in a shape that allows the hole to pass through.

The mounting structure for an electronic component according to the present invention is preferably formed as a long hole so that the mounting hole of the printed board corresponding to the lead can pass through the bent portion.

In the electronic component mounting structure according to the present invention, preferably, the mounting hole of the printed circuit board corresponding to the lead is formed as a large round hole so as to allow the bent portion to pass therethrough.

In the electronic component mounting structure according to the present invention, preferably, the length from the bent portion for preventing erroneous insertion of the lead to the tip is shorter than the thickness of the printed circuit board to be mounted.

In the mounting structure for an electronic component according to the present invention, preferably, the length from the bent portion for preventing erroneous insertion of the lead to the base is selected to be equal to or longer than the entire length of the other lead.

According to the above construction, one of the leads has a bent portion for preventing erroneous insertion, and a corresponding mounting hole of a printed circuit board to be mounted passes through the bent portion. It is formed in a shape that can be obtained, for example, a long hole or a large hole. Therefore, when each lead is inserted into the mounting hole of the printed circuit board to be mounted in a normal direction, the bent portion for preventing the erroneous insertion of the one-side lead can pass through the corresponding mounting hole, All the leads can be inserted into the corresponding mounting holes.

On the other hand, when each lead is inserted in the mounting hole of the printed circuit board to be mounted in the opposite direction, the mounting hole into which the one-side lead is inserted only allows the normal lead to pass. Since the size is selected, the bent portion for preventing erroneous insertion is locked to the edge of the mounting hole, and the lead cannot be completely inserted into the mounting hole.

For this reason, for example, when an electronic component is mounted on a printed circuit board for mounting using an automatic insertion machine, the electronic component is not completely inserted if the electronic component is opposite to the printed circuit board. Therefore, such an electronic component inserted in the opposite direction can be easily visually recognized. Therefore, in an overseas factory or a cooperative factory where capital investment does not proceed as desired, in a factory that produces a small amount of various types of electronic devices, quality improvement or quality maintenance in mounting electronic components can be easily performed. Become like

If the length from the bent portion to the tip of the lead for preventing erroneous insertion is selected to be shorter than the thickness of the printed circuit board to be mounted, the erroneous insertion in the reverse direction is prevented. When the bent portion is locked to the edge of the mounting hole of the printed circuit board to be mounted, the tip of the lead does not protrude from the lower surface of the printed circuit board. It is not soldered to the conductive pattern formed on the lower surface and is not electrically connected. Therefore, if there is a wrong insertion of the electronic component in the reverse direction,
At the time of inspection of an electronic circuit or an electronic device incorporating the electronic component, they do not operate properly and do not damage other electronic components.

If the length of the lead from the bent portion for preventing erroneous insertion to the root is selected to be equal to or longer than the entire length of the other lead, the erroneous insertion in the opposite direction is similarly performed. When the bent part for preventing incorrect insertion is locked to the edge of the mounting hole of the printed circuit board to be mounted, the tip of the other lead may
Since they do not protrude from the lower surface of the printed circuit board, these other leads are not soldered to the conductive patterns formed on the lower surface of the printed circuit board in the soldering step, and are not electrically connected. Therefore, when an electronic component is incorrectly inserted in the opposite direction, when inspecting an electronic circuit or an electronic device incorporating the electronic component, they do not operate properly.
Also, there is no damage to other electronic components and the like.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings. FIG. 1 shows a first embodiment of an electronic component mounting structure according to the present invention.
In FIG. 1, an electronic component 10 includes a main body 11 and two leads 12, 1 extending from the main body 11 in parallel with each other.
And 3. These leads 12 and 13
At the time of mounting, the conductive pattern (not shown) formed on the lower surface of the printed circuit board 14 is inserted into the mounting holes 14a and 14b provided on the printed circuit board 14 for mounting and soldered. The connection is made electrically.

The above configuration is the same as the conventional electronic component mounting structure shown in FIG. 6. However, in the electronic component mounting structure according to the present invention, one of the leads 12 But a bent portion 12a for preventing erroneous insertion.
And the lead 1 of the printed circuit board 14.
As shown in FIG. 1B, the mounting hole 14a corresponding to the second hole 2 is formed as a long hole so as to pass through the bent portion 12a. Here, when the length from the base to the bent portion 12a is L1 and the length from the bent portion 12a to the tip is L2, L2 is shorter than the thickness of the printed circuit board 14.

The electronic component mounting structure according to the embodiment of the present invention is configured as described above. When the electronic component 10 is mounted on the printed circuit board 14 in a normal direction, as shown in FIG. In addition, each of the leads 12 has a bent portion 12a passing through a mounting hole 14a formed as a corresponding long hole of the printed circuit board 14, so that each lead 1
2, 13 could be fully inserted.

On the other hand, when the electronic component 10 is mounted on the printed board 14 in the opposite direction, the leads 12 of the electronic component 10 are inserted into the mounting holes 14b of the printed board 14 as shown in FIG. The bending portion 12
a is locked by the edge of the mounting hole 14b of the printed circuit board 14. Therefore, in this case, the leads 12,
13 is not completely inserted, and the main body 11 is
4 is held in a floating state. Therefore, when the electronic component 10 is inserted in the opposite direction,
By visually recognizing the electronic component 10 after insertion, the electronic component 10 can be easily grasped.

Further, in this case, the bent portion 1 of the lead 12
The length L2 from 2a to the tip is selected to be shorter than the thickness of the printed circuit board 14, so that in the case of incorrect insertion in the reverse direction, the bent portion 12a of the lead 12 becomes the edge of the mounting hole 14b of the printed circuit board 14. When locked by the portions, the tips of the leads 12 do not project from the lower surface of the printed circuit board 14. Therefore, in the soldering process, the lead 12
Are not soldered to the conductive pattern formed on the lower surface of the printed circuit board 14 and are not electrically connected. Thus, if an electronic component is incorrectly inserted in the reverse direction, the electronic circuit or electronic device operates correctly because the electronic component is not connected during the inspection of the electronic circuit or electronic device incorporating the electronic component. In addition, damage to other electronic components and the like due to the reverse connection can be prevented.

FIG. 4 shows a second embodiment of the electronic component mounting structure according to the present invention. In FIG. 4, the electronic component 20 includes a main body 21 and two leads 22 and 23 extending downward from the main body 21 in parallel with each other. In this case, the bent portion 22a
When the length of the lead 23 is L1 and the length of the lead 23 is L3, this L3 is selected to be equal to or smaller than L1. In this embodiment, the printed board 14 in the electronic component mounting structure shown in FIG. 1 is used as a printed board on which the electronic component 20 is to be mounted.

According to the mounting structure of the electronic component having such a configuration, when the electronic component 20 is mounted on the printed circuit board 14 in the opposite direction, the lead is provided similarly to the electronic component 10 shown in FIG. The bent portion 22a of the printed circuit board 22 is held at the edge of the mounting hole 14b of the printed circuit board 14, so that the printed circuit board 14 is held in a state of floating above the surface of the printed circuit board 14. Further, in the case of this electronic component 20, the leads 23
When the electronic component 20 is mounted in the reverse direction with respect to the printed circuit board 14 because the length L3 is selected to be equal to or shorter than the length L1, the lead 23 has the tip thereof from the lower surface of the printed circuit board 14. Does not protrude. Therefore, in the soldering step, the leads 23 are not soldered to the conductive patterns formed on the lower surface of the printed circuit board 14 and are not electrically connected. Thus, if an electronic component is incorrectly inserted in the reverse direction, the electronic circuit or electronic device operates correctly because the electronic component is not connected during the inspection of the electronic circuit or electronic device incorporating the electronic component. In addition, damage to other electronic components and the like due to the reverse connection can be prevented.

In the above-described embodiment, the mounting hole 14a of the printed circuit board 14 is formed as an elongated hole. However, as shown in FIG. Bend 2 of lead 22
Obviously, it may be formed as a large diameter round hole 14a 'through which 2a can pass.

In the above embodiment, the electronic component 1
0 and 20 have two leads 12, 13 or 22, 23 parallel to each other, but the present invention is not limited to this, and the present invention is also applied to an electronic component having three or more leads having polarity. Obviously gaining. In the above-described embodiment, the leads 1 of the electronic components 10 and 20 are used.
Although 2, 13 or 22, 23 do not have a bent portion for positioning, it is apparent that, like the conventional electronic component 1 shown in FIG. 6, a bent portion for positioning may be provided. .

[0025]

As described above, according to the present invention, one of the leads is provided with a bent portion for preventing erroneous insertion, and the corresponding mounting hole of the printed circuit board to be mounted is correspondingly provided. Is formed in a shape that allows the passage of the bent portion, for example, a long hole or a large hole. Therefore, when each lead is inserted into the mounting hole of the printed circuit board to be mounted in a normal direction, the bent portion for preventing the erroneous insertion of the one-side lead can pass through the corresponding mounting hole, All the leads can be inserted into the corresponding mounting holes.

On the other hand, when each lead is inserted in the mounting hole of the printed circuit board to be mounted in the opposite direction, the mounting hole into which the lead on one side is inserted only allows the normal lead to pass. Since the size is selected, the bent portion for preventing erroneous insertion is locked to the edge of the mounting hole, and the lead cannot be completely inserted into the mounting hole.

For this reason, for example, when an electronic component is mounted on a printed circuit board for mounting using an automatic insertion machine, the electronic component is not completely inserted if the electronic component is opposite to the printed circuit board. Therefore, such an electronic component inserted in the opposite direction can be easily visually recognized. Therefore, in an overseas factory or a cooperative factory where capital investment does not proceed as desired, in a factory that produces a small amount of various types of electronic devices, quality improvement or quality maintenance in mounting electronic components can be easily performed. Become like

Thus, according to the present invention, it is possible to provide an extremely excellent structure for mounting an electronic component which prevents erroneous insertion of an electronic component having polarity.

[Brief description of the drawings]

1A and 1B show a configuration of a first embodiment of an electronic component mounting structure according to the present invention, wherein FIG. 1A is a schematic cross-sectional view in a state before electronic components are mounted, and FIG. 1B is a plan view of a printed circuit board. .

FIG. 2 is a schematic sectional view showing a normal mounting state of the electronic component in the electronic component mounting structure of FIG. 1;

FIG. 3 is a schematic cross-sectional view showing a mounting state of the electronic component in a reverse direction in the mounting structure of the electronic component of FIG. 1;

FIG. 4 is a schematic side view showing a configuration of an electronic component in a second embodiment of the electronic component mounting structure according to the present invention.

FIG. 5 is a plan view showing a mounting hole of a printed circuit board in a third embodiment of the electronic component mounting structure according to the present invention.

FIG. 6 is a schematic cross-sectional view showing an example of a conventional electronic component mounting structure before mounting electronic components.

FIG. 7 is a schematic sectional view showing a normal mounting state of the electronic component in the electronic component mounting structure of FIG. 6;

FIG. 8 is a schematic cross-sectional view showing a mounting state of the electronic component in a reverse direction in the mounting structure of the electronic component of FIG. 6;

[Explanation of symbols]

 10, 20 Electronic component 11, 21 Main body 12, 13, 22, 23 Lead 12a, 22a Bend for preventing incorrect insertion 14 Mounting printed circuit board 14a Mounting hole (long hole) 14a 'Mounting hole (large round hole) 14b Mounting hole

Claims (5)

[Claims] 1. A lead body comprising: a main body; and a plurality of leads extending parallel to each other from the main body, each lead having a polarity, and each lead being inserted into a corresponding mounting hole of a printed circuit board during mounting, and Regarding the electronic component to be attached, one of the leads has a bent portion for preventing erroneous insertion in the middle, and the mounting hole of the printed circuit board corresponding to the lead is formed in a shape that can pass through the bent portion. A mounting structure for electronic components, characterized in that: 2. The mounting structure for an electronic component according to claim 1, wherein the mounting hole of the printed circuit board corresponding to the lead is formed as an elongated hole so as to allow the bent portion to pass therethrough. . 3. The mounting of the electronic component according to claim 1, wherein the mounting hole of the printed circuit board corresponding to the lead is formed as a large round hole so as to allow the bent portion to pass therethrough. Construction. 4. The electronic component according to claim 1, wherein a length from a bent portion to a tip of the lead for preventing erroneous insertion of the lead is selected to be shorter than a thickness of a printed circuit board to be mounted. Mounting structure. 5. The method according to claim 1, wherein the length from the bent portion for preventing erroneous insertion of the lead to the root is selected to be equal to or longer than the total length of the other leads. Mounting structure for electronic components.