JP2001085811A - Perforated pin for through-hole - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a perforated pin for solder through-hole having a simple structure that is suitable for the wiring change, etc., of a circuit board. SOLUTION: A perforated pin for solder though-hole is composed of two kinds of male and female perforated pins 1 and 2, provided with flanges 11 and 12 which are used in a state such that the flanges are inserted into the through-hole of a circuit board 3 form both sides of the board 3 as auxiliary part when temporary repairs, remodeling, etc., are performed on a board 3. On the backsides of the flanges 11 and 12 of the pins 1 and 2, a heat-resistant adhesive is provided and when the pins 1 and 2 are inserted into the through- hole of the circuit board 3, the pins 1 and 2 can be locked to the surface of the board 3 with the flanges 1 and 12, and at the same time, can be fixed temporarily to the board 3 with the adhesive. On the front surfaces of the flanges 11 and 12 of the pins 1 and 2, copper foil is provided to make a solder 6 to spread well. Copper foil is also provided on the internal surface of the male perforated pin 1 and the coupling surfaces of the pins 1 and 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a perforated pin for forming a solder through hole in a circuit board, and more particularly to a perforated pin for a solder through hole suitable for emergency treatment such as a change in circuit connection of a circuit board.

[0002]

2. Description of the Related Art Conventionally, holes (holes) penetrating a printed wiring board having a wiring pattern formed on both sides thereof are formed.
As a wiring pattern connection structure in which printed wiring patterns on each surface are mutually connected by pins inserted into the holes, a structure is known in which cylindrical pins are inserted from both sides of a printed wiring board to perform solder connection. (JP-A-58-46)
694).

FIGS. 9 and 10 show a conventional wiring pattern connection structure. As shown in FIG. 3, the shape of the pin to be penetrated and inserted into the hole
1 and 201, and has a tip 10
In order to engage and temporarily fix the other pins to the pins 3 and 203, the tip 103 of one of the pins 100 has a tapered fitting convex portion, and the tip of the other pin 200 has the tapered tip. It has a structure having a tapered fitting recess for fitting the tip 103. In addition, the first and second pins 1
00 and 200 are inserted from the respective surfaces of the printed wiring board as shown in FIG.
1 is locked to both wiring patterns, and the fitting concave and convex portions 103 and 203 at the tips of both pins are fitted and temporarily fixed in the holes of the board, and the wiring patterns on both surfaces are connected by soldering. It is composed.

[0004]

Conventionally, when changing the wiring of a circuit board, changing or improving circuit performance, etc. at the time of trial production of a circuit board, a new circuit board or the like is added or the circuit board itself is revised. May be. However, the additional substrate has a problem in handling and does not look good. In addition, in order to respond to the revision of the board, new costs are incurred, and the delivery time is prolonged. Therefore, it is effective to form a hole in the circuit board, insert a pin, and use the pin for circuit wiring to change or improve the wiring configuration and circuit function of the circuit board.

However, the wiring pattern connection structure as described above is originally used for connecting the wiring patterns on the front and back surfaces of the substrate, and diverting such a connection structure has the following problems. is there. That is, in the above-described conventional wiring pattern connection structure, in order to engage with and temporarily fix the other pin to the tip of each pin, one tip has a tapered fitting convex portion and the other has a tapered fitting projection. Each tip itself has a structure having a fitting concave portion with a tapered end for fitting the convex portion, and is fitted and temporarily fixed and joined at the center of the substrate in the hole. Is complicated in shape and structure, and there are also difficulties in terms of pin design accuracy and manufacturing. In addition, each pin has a convex portion in the circumferential direction near the fitting portion inside the pin itself, and when a lead wire, a terminal of a component, or the like is inserted, it interferes with insertion and connection from any direction. .
Further, since the pins are always attached to the surface of the substrate, they cannot be used in accordance with the circuit pattern, for example, a bridge with another circuit pattern occurs at the time of circuit wiring by soldering.

(Purpose) An object of the present invention is to provide a perforated pin for a solder through hole having a simple structure suitable for changing the wiring of a circuit board.

Another object of the present invention is to provide a perforated pin for a solder through hole, which can reduce the remodeling cost of a prototype machine and an evaluation machine and can firmly form a pinhole. .

It is another object of the present invention to provide a simple structure of a perforated pin for a solder through hole which can be used as a wiring terminal separated from the surface of a circuit board and suitable for changing the wiring of a circuit board.

[0009]

The perforated pin of the present invention comprises:
It is composed of two types of male and female perforated pins provided with flanges that are inserted into the circuit board from the front and back and used as auxiliary parts when performing emergency processing, remodeling, etc. of the circuit board. A heat-resistant adhesive is provided on the back side of the flange of each of the male and female pins, and when the pins are inserted into holes in the circuit board, the pins are locked to the surface of the board by the flange, It has a function of temporarily fixing the pins to the circuit board with the adhesive.

[0010] The copper foil for improving the soldering is provided on the surface of the flange of each of the male and female pins, and the copper foil is also provided on the inner surface of the male perforated pin. Also with copper foil. In addition, each perforated pin can be manufactured using a soldering iron and a nonmetallic material that does not melt with the heat of the solder. For example, it can be manufactured by manufacturing with silicon glass or the like and performing copper plating so that a copper foil is formed at a required portion.

[0011] When two types of perforated pins of a male type and a female type are fitted to each other, by providing a copper foil on the contact surface between them, they are firmly connected by solder so that they cannot be separated from each other.

That is, the perforated pin for a through hole according to the present invention is provided at a tubular portion having a length substantially equal to the thickness of the circuit board inserted into the through hole of the circuit board, and at one end of the tubular portion. A female perforated pin having a flange for locking with the circuit board, and a thickness of the circuit board for being inserted and fitted into a hole at the other end of the tubular portion of the female perforated pin. It comprises a male-shaped perforated pin having a tubular portion of approximately the same length and a flange provided at one end of the tubular portion and engaged with a circuit board in a fitted state, and at least a female type and a male type. The outer surface of the flange portion of the perforated pin, the inner surface of the tubular portion of the female perforated pin, and the inner and outer surfaces of the tubular portion of the male perforated pin are conductor surfaces that can be soldered.

A tubular portion having a length substantially equal to the thickness of the circuit board inserted into the through hole of the circuit board; and a flange provided at one end of the tubular portion for locking with the circuit board. ,
A female perforated pin having a projection in the middle of the inside of the tubular portion, and inserted into the hole of the tubular portion of the female perforated pin from the other end and engaged with the projection by locking A male perforated pin having a tubular portion having a length exceeding the length from the other end of the female perforated pin to the protrusion, and a flange provided at one end of the tubular portion. At least, the outer surfaces of the flanges of the female and male perforated pins, the inner surface of the tubular portion of the female perforated pin, and the inner and outer surfaces of the tubular portion of the male perforated pin are conductor surfaces that can be soldered. It is characterized by the following.

The perforated pin for a through hole according to the present invention comprises:
It is preferable to apply an adhesive to a surface of the female perforated pin flange or the male perforated pin flange which is to be engaged with the circuit board, and a non-metallic material is used as the pin material. It can be manufactured by molding by injection molding or the like and providing a copper foil on the conductor surface.

[0015]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a pin having a through hole for a solder through hole according to an embodiment of the present invention. FIGS. 1 to 6 show a structure and a perforated pin of this embodiment which can be used as circuit connection terminals for penetrating and inserting into a circuit board, connecting circuit patterns, mounting circuit components, and performing emergency treatment of the circuit board. FIG. 6 is a view showing a process of inserting and temporarily fixing a device in a circuit board.

(Explanation of Structure) FIG. 1 is a view showing the structure of a female perforated pin which penetrates and is inserted into a hole formed in a circuit board. The perforated pin 1 has a hollow cylindrical shape having an outer diameter corresponding to the diameter of the hole so that it can be inserted into the hole of the circuit board, and has a flange at one end (upper portion) which is engaged with the circuit board. 11 Also, when the cylindrical portion is inserted into the base plate, the perforated pin is temporarily fixed to the flange 11 so that
An adhesive or glue having heat resistance (referred to as “adhesive”) is applied to the back surface 14 of the flange 11.

FIG. 2 shows the structure of a male perforated pin used with the perforated pin of FIG. So that it can be inserted into the hollow cylindrical part of the female perforated pin 1
It has a hollow cylindrical portion having an outer diameter dimension corresponding to the inner diameter of the cylinder, and has a flange 21 which engages with a circuit board at one end (lower portion) of the cylindrical portion. Further, the back surface of the flange 21 is provided on the flange 21 so that when the female pin is inserted into the female hole pin 1 inserted into the board, the hole pin 2 is temporarily fixed to the circuit board in a fitted state. 14 is coated with a heat-resistant adhesive.

As the two types of perforated pins 1 and 2 in the present embodiment, a copper foil is provided on the front side of the flanges 11 and 21 so that the solder can be easily mounted. The inner surface of the cylinder is also provided with a copper foil, and is configured such that when a lead wire or a terminal is inserted and connected, it can be fixedly connected by soldering. The two types of male and female perforated pins 1 and 2 are also provided with copper foil on the contact surfaces so that when they are fitted in the cylindrical portion, the mutual coupling surfaces can be fixed by soldering. In this way, the perforated pins 1 and 2 are provided with copper foil on the opposing surfaces thereof when they are overlapped, so that they are securely connected and fixed by using solder, and firmly fixed so that they cannot be separated. Is possible.

The perforated pins 1 and 2 can be manufactured using a soldering iron and a nonmetallic material that does not melt in the heat of the solder. For example, it can be manufactured by manufacturing with silicon glass or the like and performing copper plating so that a copper foil is formed at a required portion.

As the dimensions of the perforated pins 1 and 2 of this embodiment, for example, it is preferable that the diameter is approximately 1.5 mm and the entire length is equal to the thickness of the circuit board.

(Explanation of Operation) Next, a procedure for mounting the perforated pin of the present embodiment on a circuit board for remodeling such as an emergency treatment of the circuit board, and a component to a solder through hole formed by the perforated pin. Will be described in order below. (1) The circuit board 3 is 1.5 mm in diameter with an electric drill or the like.
A hole is made by drilling a hole through the substrate. (2) As shown in FIG. 3, the perforated pin 1 is inserted from the surface of the circuit board 3 into the hole. (3) Insert the perforated pin 2 into the perforated pin 1 from the surface of the circuit board 3 opposite to the surface on which the perforated pin 1 is inserted,
4 to 6, the back surface 14 of the flange 11 of the perforated pin 1
Is temporarily fixed to the circuit board by the adhesive 14 applied to the substrate. (4) Next, the boundary between the surface 12 of the flange 11 of the perforated pin 1 and the cylindrical end surface 25 of the perforated pin 2 is soldered. At this time, the upper surface 12 of the flange 11 and the end surface 25 are flush with each other, and the two perforated pins sandwich the circuit board between the two flanges and are firmly fixed by an adhesive and solder. As a result, as shown in FIG. 7, a conductive pinhole penetrating the front and back of the circuit board is formed, and the pinhole has the same function as a normal solder through hole. (5) Also, in the temporarily fixed state shown in FIG. 6 or the soldered state shown in FIG. 7, the terminals (legs) of the electronic components such as the lead wires used for the emergency treatment or the pins connected to the lead wires, LSIs, etc. are opened. It is inserted into the inner surface 23 of the pin and soldered. As a result, as shown in FIG.
Copper plating on surface 12 of copper, copper plating 2 on perforated pin 2
5 and the copper plating portion on the inner surface 23 of the perforated pin 2 and the copper plating portion on the surface 22 of the flange 21 to electrically connect the lead wires and the like, and to connect the male and female perforated pins to each other. Is also performed to obtain a firmly fixed state.

(Other Embodiments) Further, the perforated pins can be attached to the circuit board at the locations where the wiring patterns are provided. For example, as shown in FIG. 9, when a circuit board has a ground pattern or the like on one side and a potential difference on the ground pattern is generated by a high-frequency signal, the wiring on the other side of the ground pattern is not shown. By mounting the perforated pin between the (pattern) and the ground pattern (strengthening the ground), the pin can be used as a noise countermeasure for preventing noise caused by a potential difference.

In the above embodiment, an example is shown in which male and female perforated pins are used as component mounting through holes or wiring terminals by sandwiching the board between the flanges of each pin. The female perforated pin can be mounted so that one flange of the pin is floated from the substrate, so that the structure can be improved for ease of use as a component mounting and wiring terminal.

FIG. 10 is a diagram showing such a perforated pin and its structure. The female perforated pin 1 is provided with a stopper 9 having an inclined surface and a stopper surface in a cylindrical shape inside or partially or entirely around the inner surface of the cylinder. Each pin is fitted so that penetration of the end surface 25 of the shape is prevented, and the flange 21 of the male perforated pin 2 is located at a position away from the surface of the circuit board. The perforated pin 1 can be connected to the conductor pattern of the board by soldering.
The contact portion of each perforated pin can also be fixed by soldering. Further, a method of connecting the respective perforated pins to each other at the same time as connecting the electrodes or the lead wires of the component with the male perforated pins as terminals can be adopted. FIG. 11 is a diagram showing an example in which the electrodes of the component are connected to the male pin 2 with the male pin shown in FIG.

In this embodiment, the stopper is provided inside the cylinder of the female perforated pin. On the contrary, the stopper can be provided outside the cylinder of the male perforated pin. Further, it is possible to configure the female perforated pins so that the perforated pins are fitted to each other such that the flange of the female perforated pin is located at a position separated from the surface of the circuit board.

In the above-described embodiment, an example is shown in which the perforated pin is formed in a cylindrical shape. It's clear what we need to do.

[0027]

As described above, the perforated pin of the present invention comprises a female perforated pin with a flange for engaging with a circuit board having a length substantially equal to the thickness of the circuit board, A male perforated pin having a flange portion inserted and fitted into the hole at the other end of the tubular portion of the perforated pin, the outer surface of the female and male perforated pin flange portion, Since the inner surface of the tubular portion of the perforated pin and the inner and outer surfaces of the tubular portion of the male perforated pin have a structure of a conductor surface capable of being soldered, the front and back solder through holes with respect to the circuit board are securely and firmly formed. Thus, it is possible to easily form required electrodes on the circuit patterns, make electrical connections between the circuit patterns, attach circuit components, and the like.

Further, since the adhesive is applied to the surface of the flange which is in contact with the circuit board, it is easy to form and temporarily fix the solder through hole, the work efficiency such as circuit connection change is improved, and the circuit board Revision is not required, and the cost of remodeling a prototype, an evaluation machine, and the like can be reduced.

Further, by using a female perforated pin having a projection at the middle of the inside of the tubular portion, the flange of the male perforated pin can be used as a terminal on a circuit board, and other circuit patterns can be used. Connection mistake when changing the circuit connection of the bridge or the like can be prevented.

[Brief description of the drawings]

FIG. 1 is a diagram showing a structure of a female perforated pin according to an embodiment of the present invention.

FIG. 2 is a diagram showing a structure of a male perforated pin according to an embodiment of the present invention.

FIG. 3 is a diagram showing attachment of the circuit board and the male and female perforated pins of the present embodiment.

FIG. 4 is a diagram showing an attached state of the female perforated pin of the present embodiment.

FIG. 5 is a diagram showing a process of inserting the male perforated pin of the present embodiment.

FIG. 6 is a diagram showing a mounted state of the male and female perforated pins of the present embodiment.

FIG. 7 is a view showing solder through holes formed by connecting perforated pins by soldering.

FIG. 8 is a diagram showing a usage example of a solder through hole.

FIG. 9 is a diagram showing another embodiment of the present invention.

FIG. 10 is a diagram showing another embodiment of the present invention.

FIG. 11 is a diagram showing a usage example of the embodiment shown in FIG. 10;

FIG. 12 is a diagram showing a conventional pin structure for connecting a wiring pattern.

FIG. 13 is a sectional view of a conventional wiring pattern connection structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Female perforated pin 2 Male perforated pin 3 Substrate 11, 21 Flange 13, 23 Inner surface of cylindrical portion 14, 24 Inner surface of flange 12, 22 Outer surface of flange 15, 25 End of cylindrical portion Part 4, 6, 8 Solder 41 Terminal (legs such as resistance) 5 Electronic component 7 Conductor layer (copper foil, shield) 9 Projection 100, 200 pins 102, 202 Cylindrical part 103, 203 Fitting part

Claims (6)

[Claims] 1. A tubular portion having a length substantially equal to the thickness of a circuit board inserted into a through hole of a circuit board, and a flange provided at one end of the tubular portion for locking with the circuit board. A female perforated pin having a tubular portion having a length substantially equal to the thickness of a circuit board to be inserted and fitted into a hole at the other end of the tubular portion of the female perforated pin; And a male perforated pin having a flange provided at one end of the portion and engaged with the circuit board in a fitted state, at least an outer surface of the flange of the female and male perforated pins, A perforated pin for a through hole, wherein the inner surface of the tubular portion of the perforated pin and the inner and outer surfaces of the tubular portion of the male perforated pin are conductor surfaces to which solder connection is possible. 2. The adhesive according to claim 1, wherein an adhesive is provided on a surface of the female perforated pin flange or the male perforated pin flange which is engaged with the circuit board. Perforated pin for through hole. 3. A tubular portion having a length substantially equal to the thickness of the circuit board inserted into the through hole of the circuit board, and a flange provided at one end of the tubular portion for engaging with the circuit board. A female perforated pin having a protrusion in the middle of the inside of the tubular portion, and inserted into a hole at the other end of the tubular portion of the female perforated pin, engaged with and fitted to the protrusion. A tubular portion having a length exceeding the length from the other end of the female perforated pin to the protrusion, and a male perforated pin having a flange provided at one end of the tubular portion. At least, the outer surfaces of the flanges of the female and male perforated pins, the inner surface of the tubular portion of the female perforated pin, and the inner and outer surfaces of the tubular portion of the male perforated pin are conductor surfaces that can be soldered. A perforated pin for through holes, characterized in that: 4. The perforated pin for a through hole according to claim 3, wherein an adhesive is provided on a surface of the collar portion of the female perforated pin which is engaged with the circuit board. 5. The female perforated pin or the male perforated pin is formed of a non-metallic material, and the conductor surface is provided with a copper foil. Perforated pin for through hole described. 6. The perforated pin for a through hole according to claim 1, wherein the tubular portion has a cylindrical shape.