JPH10233566A - Electronic circuit board and method of fixing electronic part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure the mechanical and electric fixture of electric parts mounted on a board and their electric continuity, even if unforeseen external force is applied to them by fall or vibration, etc. SOLUTION: These are an electronic circuit board and a fixing method which fixes, in immobile state, each kind of electronic parts including those consisting of plural constituent parts on the board 1 by means of the first fixing means to perform the mechanical fixture and electric continuity, and this board possesses a second fixing means 3 which performs the mechanical fixture by passing a hole 1b bored in the board 1 and also, retaining the topside section of the electric part 2 in immobile state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for fixing an electronic component and an electronic circuit board, and more particularly to a technique suitably applicable to an electronic circuit on which an electronic component including a plurality of components such as a choke coil is mounted. is there.

[0002]

2. Description of the Related Art Heretofore, various electronic circuit boards composed of a plurality of components such as choke coils or integrally mounted with heavy electronic components such as transformers have been put to practical use as power supply means for various devices. ing.

Referring to the drawings, an example of the configuration of an electronic circuit board will be described. FIG. 10 is an external perspective view of an electronic circuit board.
In this drawing, each electronic component is generally fixed to one mounting surface of a substrate due to restrictions such as a soldering process.

More specifically, in FIG.
In FIG. 1, holes are formed in the land pattern of the component mounting pattern. The choke coil 102, which is a common mode coil, the rectifier diode 106,
Aluminum electrolytic capacitors 107, 109, 110 and resistor 1
11 and an X capacitor 113 are mounted, and a power supply is configured as an electronic circuit by appropriately connecting the jumpers 112.

Although these components are examples of main components constituting a power supply circuit, it is needless to say that the components are not limited to the power supply.
Of course, it is not only a matter of course.

FIGS. 11 and 12 are a left side view and a front view, respectively, of the choke coil 102 as the electronic component in FIG. 10, and are cut away at a plane passing through the hole of the substrate 101. FIG. .

[0007] In both figures, the choke coil 102 is configured as follows. First, a bobbin 102a around which a coil 115 is wound, and a plurality of cores 102b forming a magnetic path and a plurality of coils 115 for being wound around the bobbin 102a, which are fixed to the mounting pattern of the printed circuit board 101 by soldering to perform electrical conduction It is composed of a lead pin 120, a direct connection part 116, 117 for fixing the tip of the coil to the lead pin 120 for electrical conduction, and a connecting part 119 for the lead pin 120.

The choke coil 1 configured as described above
02, the lead pin 120 is inserted into the hole of the substrate 101,
In the soldering process, the solder 122 is electrically and mechanically fixed to the pattern of the substrate 101.

Next, FIGS. 13 and 14 show a choke coil 1.
02 is a left side view and a front view. In FIG. 13, a press-fit portion 125 of a lead pin inserted into the bobbin 102a is used.
And a protrusion 126 for reinforcing press-fitting and a press-fitting hole 127 for press-fitting the lead pin of the bobbin.

In FIG. 14, for example, when a product incorporating the electronic circuit is accidentally dropped, or when a large vibration is continuously applied, the impact force,
As a result of the application of the excitation force or the like, the fixed state of the component is released. For this reason, for example, the overhang portion 125 comes off the bobbin 102a, the overhang portion 125 is deformed as illustrated, and the connection portion 116 is disconnected.

[0011]

Therefore, as shown in an external perspective view of FIG. 15, a heavy component such as a choke coil is bonded and fixed to the substrate 101 using an adhesive 102c. For this reason, there has been a problem that the application step of the adhesive and the control of the application amount are required.

When an external force acts as described above, the relative positional relationship between a plurality of components may change in a component composed of a plurality of components, or the component itself may be broken if the external force is large. There was a problem. Further, even if the component does not result in mechanical destruction, there is a problem that disconnection occurs due to a change in the positional relationship as described above.

Accordingly, the present invention has been made in view of the above-mentioned problems, and the mechanical and electrical characteristics of the electric components mounted on the substrate are improved even when an unexpected external force is applied due to a drop or vibration. An object of the present invention is to provide a method for fixing an electronic component and an electronic circuit board that can guarantee the fixing and the conduction state. ,

Means for Solving the Problems The above-mentioned problems are solved,
In order to achieve the object, according to the present invention, various electronic components including an electronic component composed of a plurality of components are fixed in an immovable state by a first fixing unit that performs mechanical fixing and electrical conduction on a substrate. An electronic circuit board having a second fixing means for performing the mechanical fixing by passing through a hole formed in the board and holding an upper surface portion of the electronic component in an immobile state. It is characterized by:

Further, there is provided an electronic component fixing method in which various electronic components including an electronic component composed of a plurality of components are fixedly immobilized on a substrate by a first fixing means for performing mechanical fixing and electrical conduction. The mechanical fixing is further performed by a second fixing unit that passes through a hole formed in the substrate and holds an upper surface portion of the electronic component in an immobile state.

Further, an electronic component comprising a plurality of components and having a connecting portion tangled to a lead pin is immovably fixed on a substrate by a first fixing means for mechanically fixing and electrically conducting. An electronic circuit board, comprising: a lower portion of a tie wire tied to the lead pin soldered to pass through a mounting hole formed in the substrate; and an upper surface portion of the electronic component. It is characterized in that it comprises a second fixing member for holding the space immobile.

Then, an electronic component composed of a plurality of components and having a lead pin with a connecting portion tangled thereto is provided as a first component.
A method for fixing an electronic component that is fixed in an immobile state by fixing means, and performs mechanical fixing and electrical conduction on a substrate,
An immovable state is maintained between the lower part of the tie wire tied to the lead pin soldered so as to pass through the mounting hole formed in the substrate and the upper part of the electronic component. It is characterized in that a second fixing member is used.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments according to the present invention will be described below in detail with reference to the accompanying drawings.

First, FIG. 1 is a perspective view of the external appearance according to the first embodiment, FIG. 2 is a view taken along the line AA of FIG. 1, FIG. 3 is a view taken along the line BB of FIG. FIG. 3 is a diagram cut away along a surface along a hole of No. 1;

First, in FIG. 1, a component mounting pattern (not shown) is formed on the back surface of the printed circuit board 1,
Holes 1a are drilled in the land pattern portions, and choke coils 2, rectifier diodes 6, aluminum electrolytic capacitors 7, 9, 10 and resistors 11 and X capacitors are provided for these holes 1a. 13
Are mounted by soldering after each lead is inserted, and a power supply as an electronic circuit is configured by connecting the front side using a jumper wire 112 as appropriate.

Although these parts are examples of the main parts constituting the power supply circuit, it is needless to say that the present invention is not limited to the power supply, and is not limited to the choke coil 2 described below. .

2 and 3, the choke coil 2 is configured as follows. First, coil 1
The bobbin 2a around which the coils 4 and 15 are wound, the core 2b constituting the magnetic path, and the coils 14 and 15 wound around the bobbin 2a, respectively, are fixed to the mounting pattern of the printed circuit board 1 by soldering so as to perform electrical conduction. A plurality of lead pins 20, 2
1 and the coils 14, 1
Direct connection part 1 for fixing the tip of 5 and conducting electric conduction
Keg 1 for 6, 17 and lead pins 20, 21
8 and 19.

The choke coil 2 configured as described above
The lead pins 20 and 21 are inserted into the holes 1a of the substrate 1 so as to be electrically and mechanically fixed to the pattern of the substrate 1 with solder H in a soldering process.

On the other hand, a hole 1b for inserting a band 3 as a second fixing means is previously formed in the substrate 1 near the choke coil, and the band 3 is formed into a loop as shown in the drawing. The choke coil can be fixed in a stationary state. As the band 3, various types can be used. For example, trade names: Insulok tie,
The state shown in the figure can be easily obtained by using a bundled band made of nylon resin called Titon, Tie Wrap, or Faston, but it goes without saying that various bands can be used without being limited to these bands.

The band 3 is provided at a one-way clutch portion 3a, a member tip 3b, and a member tip, and is engaged with the one-way clutch to be locked by a latch portion 3c and latch teeth 3d.
And one-way clutch teeth 3e and one-way clutch 3f.

The band 3 is passed through the hole 1b of the substrate 1,
Also, by fixing the lead pins 21 and 21 as the first fixing means of the choke coil to the substrate pattern by solder H separately from the upper surface of the choke coil 2 so as to be obliquely crossed, 2 can be fixed to the substrate 1 as the core 2b.

According to the above arrangement, even when an external force or vibration h that generates a component force substantially parallel to the mounting surface of the substrate or a component force substantially parallel to the mounting surface of the substrate is applied, the lead pins 20 and 21 can be prevented from coming off the bobbin 2a.

That is, in FIGS. 3 and 4, the band 3 as the second fixing means is passed through the tip 3b from the surface opposite to the pattern with respect to the hole 1b of the substrate 1, and the tip 3b is inserted into the other hole 1b. In FIG. 2, the core 2b is substantially point-symmetric with the center of the choke coil 2 from one side of the core 2b.
b on the other side, and furthermore, the front end 3b of the one-way clutch portion 3a is locked by strongly pulling it after passing through the tip 3b.
Achieves a second fixation of the choke coil 2 with respect to.
By the fixing described above, the occurrence of the trouble as described with reference to FIG. 14 can be prevented.

Next, FIG. 4 is an external perspective view showing a second embodiment, FIG. 5 is a view taken on line AA of FIG. 4, and FIG. 6 is a view taken on line BB of FIG. FIG. 7 is a view showing a state in which the band 23 prevents the part from being removed when the part is subjected to impact or vibration.

In FIG. 4, the same components as those already described are denoted by the same reference numerals, and the description thereof will be omitted. If the description is limited to the characteristic portions, a band 23 as a second fixing member will attach the choke coil 2 to the substrate 1. It is inserted through the hole 1b.

In FIGS. 5 and 6, a band portion 23a which is applied to the core 2b of the band 23 is provided in contact with the core 2b of the choke coil 2 so that the band 23 is passed through the hole 1b. It is configured to be fixed. Further, in FIG. 5, the width L2 of the hole 1b is set to be substantially equal to the width L1 of the band 23. Therefore, the band 23 passed through the hole 1b is not fixed so as to be immobile in the width direction by the hole 1b.

Further, as shown by a broken line in the figure, in order to immobilize the band 23 in the width direction, one band is provided near the choke coil 2.
Only one hole 1b is formed, and a band 2 is formed in a convex protrusion or a concave recess 1f provided on the end face of the substrate 1.
With the configuration in which 3 is applied, the mounting operation becomes easier.

Therefore, in the case of the second embodiment, the effect as the second fixing means can be obtained without the need to bother the band 3 as in the first embodiment.

As a result, as shown in FIG.
Even when 5 comes off from the bobbin 2a, the core 2b can be reliably held down by the band portion 23a.

Finally, FIGS. 8 and 9 show a configuration example according to the third embodiment. In both figures, the components already described are given the same reference numerals, description thereof will be omitted, and only the characteristic portions will be described.

First, a fixing member 2 as a second fixing means
6 is provided so that the fixing portion 26a contacts the core 2b. The fixing member 26 is provided with a fixing function portion 26b which passes through the lead pins 20 and 21 fixed by solder in the land pattern portion of the printed circuit board 1, respectively, and is held below the ledge portion 19 of the lead pin. I am trying to be.

In the above configuration, since the fixing to the substrate 1 by the fixing member 26 is performed in the choke coil 2 itself, the fixing is performed irrespective of the wiring space of the substrate, the space between adjacent components, or the presence or absence of the adjacent components. It becomes possible.

That is, the fixing member 2 is held so that the fixing portion 26b is held below the barb 19 of the lead pin.
14 is provided, and some external force acts on it, as shown in FIG.
Even in the case of inclination as shown by, since the barbed portion moves as it is, disconnection of the connecting portions 16 and 17 can be prevented. According to this configuration, the fixing of the lead pins used for fixing the printed circuit board pattern and the electronic component to the component is particularly effective when the hole is pressed into the hole.

Although the above description has been made mainly on the fact that it is effective for preventing disconnection, it goes without saying that it is generally possible to compensate for the weak fixing force.

In summary, the mechanical and electrical first fixing means conventionally used is provided with another mechanical second fixing means to reinforce the fixing. At this time, in a case where the electronic component is composed of a plurality of components such as a choke coil, the weak portion of the component may not be firmly fixed by only the first fixing means. By further reinforcing the second fixing means, a large load due to shock or vibration can be given resistance to destruction.

As the second fixing means, for example, a band (wire) having a structure in which a one-way clutch is provided at one end of the wire and which is locked in the pull-out direction by inserting the other end is to be reinforced. By stopping the part and the board or other parts integrally by looping the wire rod, the load of the impact force and excitation force on the part to be reinforced can be distributed to the board and other parts, which is effective It is possible to perform a proper fixing.

Further, since the band (wire) constituting the loop is fixed in a direction substantially point-symmetrical to the side of the part and the tangent line with respect to the center of the part in the oblique direction, the band can be fixed obliquely to the part. When an impact force or a vibrating force acts on a part, a force in any direction can be received by the band. Further, the band can fix the component without coming off the component.

Further, since the band is positioned at least in the width direction on the substrate, the position is clearly defined, so that the band does not shift and the fixing can be performed more effectively. More specifically, the positioning is performed by a protrusion or a dent on the end face of the substrate, for example, a hole portion having a width substantially equal to the band width, which is formed in a shape portion after cutting the perforation for cutting the substrate. In this configuration, the displacement can be prevented by hooking the band on the protrusion or the dent of the end face of the substrate or by inserting a wire into the hole of the substrate.

By fixing the second fixing means to, for example, lead pins which are sandwiched between the printed circuit boards, the second fixing means is fixed to the electronic component composed of a plurality of parts, which is fixed to the printed circuit board. And other electronic components), you can reinforce the fixation yourself,
The second fixation can be performed with or without the presence of space or other components.

As described above, according to the present invention, when the electronic component is mechanically and electrically fixed to the printed circuit board, when the substrate and the electronic component are subjected to a load such as shock and vibration, Normally, troubles such as component breakage, disconnection, etc. occur, but for this, further fixing is performed, and it is possible to solve the trouble effectively and at low cost.
Compared with the conventional method of fixing an adhesive, since it is an application of a product manufactured in a large amount with a small number of processes (for example, generally used as a bundled band), there are many advantages such as low cost.

[0045]

As described above, according to the present invention, even when an external force is applied to a substrate on which electronic components are mounted due to dropping, vibration, or the like, the mechanical and electrical characteristics of the electric components mounted on the substrate are reduced. It is possible to provide a method of fixing an electronic component and an electronic circuit board that can guarantee the secure conduction state.

[0046]

[Brief description of the drawings]

FIG. 1 is an external perspective view of an electronic circuit board according to a first embodiment of the present invention.

FIG. 2 is a view taken in the direction of arrows BB in FIG.

FIG. 3 is a view as viewed in the direction of arrows AA in FIG. 1;

FIG. 4 is an external perspective view of an electronic circuit board according to a second embodiment.

FIG. 5 is a view taken in the direction of arrows AA in FIG. 4;

6 is a view taken in the direction of arrows BB in FIG. 4;

FIG. 7 is an operation explanatory diagram of the second embodiment.

FIG. 8 is a detailed explanatory diagram of the third embodiment.

FIG. 9 is a detailed explanatory diagram of the third embodiment.

FIG. 10 is an external perspective view of a conventional electronic circuit board.

FIG. 11 is a left side view of a conventional choke coil.

FIG. 12 is a front view of a conventional choke coil.

FIG. 13 is a view showing a component structure of a conventional example.

FIG. 14 is a diagram illustrating the operation of a conventional example.

FIG. 15 is an external view of a conventional transformer mounting board.

[Description of Signs] 1 Substrate 1a, 1b Hole 2 Choke coil 2a Bobbin 2b Core 3 Band (second fixing means) 3a Fixing part 3b Member tip 3c Latch 3d Latch tooth 3e One-way clutch tooth 3f One-way clutch 14, 15 Coils 16, 17 Coupling parts 18, 19 Tightening fixing parts 20, 21 Lead pins 26 Second fixing members 26a Second fixing function parts 26b Fixing function parts to members fixed to the substrate

Claims (16)

[Claims] An electronic circuit board for immobilizing various electronic components including an electronic component including a plurality of components on a substrate by a first fixing means for mechanically fixing and electrically connecting the electronic components. A second fixing unit that performs the mechanical fixing by passing through a hole or an uneven portion formed in the substrate and holding an upper surface portion of the electronic component in a substantially immobile state. Electronic circuit board. 2. The electronic circuit board according to claim 1, wherein the second fixing means is a wire forming a loop having the upper surface portion as an inner peripheral surface. 3. The electronic circuit board according to claim 1, wherein the wire is “crossed” so as to pass obliquely through the upper surface portion. 4. The hole according to claim 1, wherein a pair of holes are formed in the vicinity of the electronic component, and a positioning portion is provided for immobilizing the wire in the width direction. 2. The electronic circuit board according to 1. 5. An end face of the substrate, wherein one of the holes is formed in the vicinity of the electronic component in order to immobilize the wire in the width direction, and an edge of the substrate in order to immobilize the wire in the width direction. The electronic circuit board according to claim 1, further comprising a convex protrusion or a concave recess provided on the substrate. 6. A wire base, a one-way clutch portion formed at one end of the base portion, and an engagement member formed at the other end of the base portion and locked at the one-way clutch portion. The electronic circuit board according to claim 2, further comprising a stop. 7. The electronic circuit board according to claim 2, wherein the electronic component includes a choke coil having an upper surface portion of a core fixed in the immovable state. 8. A method for fixing an electronic component in which various electronic components including an electronic component including a plurality of components are fixedly immobilized on a substrate by first fixing means for performing mechanical fixing and electrical conduction. The mechanical fixing is further performed by a second fixing unit that passes through a hole or an uneven portion formed in the substrate and holds an upper surface portion of the electronic component in a substantially immobile state. How to fix electronic components. 9. The method for fixing an electronic component according to claim 8, wherein a wire forming a loop having the upper surface portion as an inner peripheral surface is used as the second fixing means. 10. The method for fixing an electronic component according to claim 8, wherein the wire is crossed so as to pass obliquely with respect to the upper surface portion. 11. The fixing of an electronic component according to claim 8, wherein a pair of the holes are formed in the vicinity of the electronic component, and the wire is immovable in a width direction at a positioning portion. Method. 12. A hole is formed in the vicinity of the electronic component in order to immobilize the wire in the width direction, and a projecting portion or a concave portion provided on an end face of the substrate is provided. The method for fixing an electronic component according to claim 1, wherein the wire is immovable in the width direction at the recess. 13. A one-way clutch formed at one end of the base, and a one-way clutch formed at one end of the base, and the wire is locked at the one-way clutch as the wire. 13. The electronic circuit board according to claim 8, wherein the electronic circuit board has a locking portion. 14. The method for fixing an electronic component according to claim 8, wherein the electronic component includes a choke coil in which an upper surface portion of a core is fixed in the immovable state. 15. An electronic component comprising a plurality of components and having a connecting portion tangled to a lead pin is immovably fixed on a substrate by first fixing means for performing mechanical fixing and electrical conduction. An electronic circuit board, comprising: a lower portion of a tie wire tied to the lead pin soldered so as to pass through a mounting hole formed in the substrate; and an upper surface portion of the electronic component. An electronic circuit board, comprising: a second fixing member that holds a space immovable. 16. An electronic component comprising a plurality of components and having a connecting portion tangled to a lead pin is fixed in an immobile state by a first fixing means, and is mechanically fixed and electrically connected to a substrate. A method for fixing an electronic component, comprising: a lower portion of a tie wire tied to the lead pin soldered so as to pass through a mounting hole formed in the substrate; and an upper surface of the electronic component. A method for fixing an electronic component, comprising using a second fixing member for holding a space between the parts in a stationary state.