JPH0917476A - Single-pole connector - Google Patents

Abstract

PURPOSE: To provide a single-pole connector in which the blocking of a male connector insert hole due to flow soldering can be prevented. CONSTITUTION: Contact pieces 3, 4 to make contact with a male connector; a support part 5 for supporting the contact pieces 3, 4; engaging parts 6, 7 to be engaged with the upper surface of a printed wiring board 11; and a terminal part 8 to be soldered to a land 13 on the reverse surface of the printed wiring board 11 are formed on a body 2 formed into substantially a square pole. Further, a body lower part 2a is formed on the body 2 lower end in the same length as the thickness of the printed wiring board 11, and a film of Teflon (Registered trademark by Du Pont) as fluorine compound is formed on its inside surface.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a single pole connector mounted on a printed wiring board.

[0002]

2. Description of the Related Art Generally, a printed wiring board on which various electronic parts are mounted has a connector mounted on its peripheral edge, and the electronic parts and the connector are electrically connected via a pattern formed on the printed wiring board. It is connected.

Signals of electronic components are input and output through the connector. By the way, it may be difficult to form a pattern from the electronic component to the connector. For example, there is a case where a current capacity of an input / output signal is large and it is necessary to form a wide pattern.

In such a case, in order to form a wide pattern, it is necessary to increase the size of the printed wiring board. Therefore, in order not to increase the size of the printed wiring board, single-pole connectors are mounted in the vicinity of the electronic components to reduce the area where a wide pattern is formed. The single pole connector is shown in FIGS.

FIG. 5A is a front view of the single-pole connector 61,
FIG. 5B is a side view. The single-pole connector 61 is provided with a body 62 having a substantially rectangular tubular shape. Its body 62
A plurality of terminals 63 are formed so as to project from the lower part of the. The main body 62 is formed with a pair of contact pieces 64 facing each other. In addition, as shown in FIG.
An engaging portion 65 is formed so as to project at a predetermined position.

When the single-pole connector 61 is mounted on the printed wiring board 66 shown by the chain double-dashed line, the engaging portion 65 engages with the front surface of the printed wiring board 66, and the terminals 6 from the rear surface.
It is formed so that only 3 projects.

That is, the portion of the main body 62 below the lower end of the engaging portion 65 is inserted into the mounting hole 67 of the printed wiring board 66. As shown in FIG. 6, the mounting hole 67 of the printed wiring board 66 is formed near an electronic component (not shown). The mounting hole 67 is formed in the main body 62 of the single-pole connector 61.
Is formed in a substantially quadrangular shape in accordance with the shape of the above, and in the vicinity thereof, a plurality of lands 68 corresponding to the terminals 63 of the single-pole connector 61 are formed on the back surface of the printed wiring board 66. The land 68 is electrically connected to an electronic component via a pattern (not shown).

When mounting the single-pole connector 61, FIG.
As shown in (a), the single-pole connector 61 is inserted into the mounting hole 67 from the front surface side of the printed wiring board 66 to a position where the engaging portion 65 engages with the surface of the printed wiring board 66. And
The terminal 63 is bent toward the land 68. By soldering the terminal 63 and the land 68, the single-pole connector 61 and the electronic component are electrically connected.

As shown in FIG. 7, a male connector L1 is inserted into the monopolar connector 61 from the back side of the printed wiring board 66, and signals of electronic components are input and output through the male connector L1. .

[0010]

By the way, when soldering the terminal 63 of the single-pole connector 61 and the land 68 formed on the back surface of the printed wiring board 66, the printed wiring board 66 is printed through a solder bath (not shown). By the method of supplying molten solder S1 from the back surface (so-called soldering surface) side of wiring board 66 (so-called flow soldering) as shown in FIG. 8, soldering is performed simultaneously with the electronic components mounted on printed wiring board 66. .

At this time, the mounting hole 67 is formed in the single-pole connector 61.
It is formed corresponding to the size of. That is, the mounting hole 67
The opening width of is wide. Therefore, the melted solder S1 is likely to rise inside the mounting hole 67, and when the solder S1 adheres to the inner surface of the main body 62, the solder S1 adhered to the main body 62 will be after the printed wiring board 66 has passed through the solder bath. Also remains inside the mounting hole 67 and inside the main body 62. This is considered to be due to the capillarity caused by the inner surface of the main body 62.

Since the remaining solder S1 cools and solidifies at the lower end of the main body 62, the lower end of the main body 62 may be blocked. When the lower end of the main body 62 is closed, the male connector L1
Since it becomes impossible to insert the solder, it is necessary to remove the solidified solder S1, which is troublesome.

On the other hand, in the method in which the jig is inserted into the main body 62 in advance and the flow soldering is performed, the clogging by the solder S1 can be prevented, but there is a problem in that the jig is still troublesome to insert.

The present invention has been made to solve the above problems, and an object thereof is to provide a single-pole connector capable of preventing the male connector insertion port from being blocked when soldering. .

[0015]

In order to solve the above-mentioned problems, the invention according to claim 1 is characterized in that a main body having a contact piece for contacting a male connector is formed, and a lower end of the main body is formed.
A single-pole connector including a lower portion of a main body inserted into a mounting hole formed in a printed wiring board, and a terminal portion protrudingly formed at a lower end of the lower portion of the main body and soldered to a land formed on a back surface of the printed wiring board. A surface treatment was applied to the inner surface of the lower portion of the main body to eliminate solder wettability.

According to the second aspect of the present invention, a film is formed as the surface treatment. In the invention according to claim 3, the coating is an oxide film. In the invention according to claim 4, the coating film is a fluorine-based compound.

[0017]

Therefore, according to the first aspect of the invention, since the inner surface of the lower portion of the main body is subjected to the surface treatment for eliminating the solder wettability, the solder does not adhere to the inner surface.

According to the second aspect of the present invention, as the surface treatment, the coating is formed on the inner surface of the lower portion of the main body.
The inner surface of the lower part of the body is covered. According to the third aspect of the present invention, by forming the oxide film, the inner surface of the lower portion of the main body is covered and insulated.

According to the fourth aspect of the present invention, by forming the fluorine compound, the inner surface of the lower portion of the main body is covered, and the heat resistance and chemical resistance of the inner surface of the lower portion of the main body are improved.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will now be described with reference to FIGS.
This will be described with reference to FIG. In this embodiment, the same members as those in the prior art are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIGS. 1A and 1B, the single-pole connector 1 is provided with a main body 2. The main body 2 is formed in a substantially rectangular tubular shape. As shown in FIG. 1C, the main body 2 is formed with a pair of contact pieces 3 and 4 facing each other. The contact pieces 3 and 4 are bent inside the main body 2 and are formed in a substantially arc shape.
Further, the main body 2 has support portions 5 formed on both sides of the contact pieces 3 and 4. The support portions 5 are each formed in a substantially trapezoidal shape, and are arranged such that their tips 5 a are located outside the contact pieces 3 and 4.

On the main body 2, the lower end of the supporting portion 5 is on the left side (see FIG. 1).
The engaging portion 6 is provided on the left side in FIG.
Engaging portions 7 are formed so as to project on the right side in (a). The engaging portions 6 and 7 are formed in a substantially rectangular shape and are formed in a direction perpendicular to the supporting portion 5.

The lower portion 2a of the main body is formed to have a length substantially the same as the thickness of the printed wiring board 11, and FIG.
As shown in FIG. 5, a film of Teflon (registered trademark of DuPont) 10 as a fluorine-based compound is formed on the inner surface of the lower body 2a to cover the inner surface of the lower body 2a.
Teflon 10 has excellent heat resistance and chemical resistance.

At the lower end of the lower portion 2a of the main body, terminal portions 8 and 9 each having a substantially rectangular shape are formed. Further, the connecting piece 14 is formed on the lower end of the lower portion 2a of the main body,
Thus, a plurality of single pole connectors 1 are connected.

Next, the surface treatment of the lower body 2a will be described with reference to FIG. As shown in FIG. 2, the single-pole connector 1 is formed by connecting a plurality of pieces in the lateral direction by the connecting pieces 14 in a state of being developed on a plane. In this unfolded state, a film of Teflon 10 is formed on the inner surface of the lower portion 2a of the main body. In this state, the single-pole connector 1 is unfolded on a plane, and the inner surface portions of the main body lower portions 2a are arranged adjacent to each other in the same direction. Therefore,
The film forming process of the Teflon 10 is easily performed by a flow operation using a roller or the like.

After the step of forming the film of Teflon 10 is completed,
The single pole connector 1 in the unfolded state is bent along the chain line shown in FIG. 2 to form the single pole connector 1 shown in FIG. After that, as shown in FIGS. 3 and 4, the connecting piece 14 is cut off and the single-pole connector 1 is attached to the printed wiring board 1.
It is implemented in 1.

As shown in FIG. 3, the printed wiring board 11 is provided with a mounting hole 12 having a substantially rectangular shape slightly larger than the opening of the single pole connector 1. The mounting hole 12 is formed in the vicinity of an electronic component (not shown) as in the conventional case. Around the mounting hole 12, a land 13 corresponding to the terminal of the single pole connector 1 is formed on the back surface of the printed wiring board 11. The land 13 is electrically connected to an electronic component via a pattern (not shown).

By engaging the engaging portions 6 and 7 of the main body 2 of the single-pole connector 1 inserted in the mounting hole 12 with the upper surface of the printed wiring board 11, the terminals from the rear surface of the printed wiring board 11 are Only the parts 8 and 9 project.
At this time, the lower part 2a of the main body is attached to the mounting hole 1 of the printed wiring board 11.
2 and is adjacent to the inner wall surface of the mounting hole 12.

As described above, with respect to the single pole connector 1 inserted in the mounting hole 12, the terminal portions 8 and 9 projecting from the back surface of the printed wiring board 11 are bent toward the land 13. Then, as shown in FIG. 3, the printed wiring board 11
Is sandwiched between the lower end of the main body 2 of the single-pole connector 1, that is, the engaging portions 6 and 7 and the terminal portions 8 and 9, and the single-pole connector 1 is attached to the printed wiring board 11. .

As described above, when the terminal portions 8 and 9 of the single pole connector 1 attached to the printed wiring board 11 are soldered, they are mounted on the printed wiring board 11 by flow soldering as in the conventional case. Soldered at the same time as electronic parts. The solder connects the monopolar connector 1 and the land 13.

At this time, as shown in FIG. 4, from the mounting hole 12 to the lower portion 2a of the main body, with respect to the back surface of the printed wiring board 11.
Since the inner surface is exposed, the solder S1 adheres to the inner surface. However, after the printed wiring board 11 has passed through the solder bath, the solder S1 is unlikely to remain on the inner surface of the lower portion 2a of the main body.

This is because the Teflon 10 film having no solder wettability is formed on the inner surface of the lower portion 2a of the main body.
As a result of suppressing the capillarity that tends to rise when the lower part 2a of the main body gets wet, the solder S1 returns to the solder bath. as a result,
Since the molten solder S1 does not adhere to the inner surface of the lower portion 2a of the main body, it is possible to prevent the lower end of the main body 2 of the single-pole connector 1 from being blocked. In addition, since Teflon 10 has excellent heat resistance, the heat of the molten solder bath (about 250 ° C)
Does not melt or peel off.

As described above, according to the single-pole connector 1 of this embodiment, the lower part 2a of the main body 2 is formed on the lower end of the main body 2, and the coating of the Teflon 10 is formed on the inner side surface thereof. Engagement portions 6 and 7 are engaged with the upper surface of the printed wiring board 11, and the lower portion 2a of the main body is attached to the printed wiring board 1.
It is arranged in the mounting hole 12 of No. 1 and only the terminal portions 8 and 9 project from the back surface. Then, after bending the terminal portions 8 and 9 toward the land 13 formed on the back surface of the printed wiring board 11,
I did flow soldering. In addition, before the single-pole connector 1 is bent and formed, that is, in a deployed state, a film of the Teflon 10 is formed on a portion which becomes the inner surface of the main body 2a.

As a result, before the bending of the single-pole connector 1, the plurality of single-pole connectors 1 are spread on a flat surface, so that the coating of the Teflon 10 can be formed in a simple process by a flow work. . In addition, due to the coating of Teflon 10 formed on the inner surface of the lower body portion 2a, the lower body portion 2a
Since the solder wettability of the inner surface is lost, the rise of the molten solder S1 can be suppressed during the flow soldering. Therefore, the printed wiring board 11 that has passed through the solder bath
Then, since the solder S1 does not remain in the mounting hole 12, it is possible to prevent the single-pole connector 1 from being blocked.

The present invention may be modified as follows, and in that case, the same operation and effect can be obtained. 1) Apply chromium oxide plating with excellent insulation to the inner surface of the lower part 2a of the main body. Even with such a configuration, the rise of the melted solder S1 can be suppressed during the flow soldering. Also, in the unfolded state of the single-pole connector 1,
Electroplating can be easily performed using a masking treatment agent.

2) Apply heat resistant coating to the inner surface of the lower part 2a of the main body. Therefore, the molten solder bath does not melt or peel off due to the heat of the solder bath, and the single-pole connector 1 can be easily coated in the expanded state.

3) In the above embodiment, the single-pole connector 1 is formed in a substantially rectangular tube shape, but it may be formed in an arbitrary shape such as a cylindrical shape. At that time, printed wiring board 1
It goes without saying that the mounting hole 12 of No. 1 is formed in a shape corresponding to the shape of the single-pole connector 1 to be mounted.

Further, the single pole connector 1 may be implemented by forming it into a generally U-shaped plane with one surface omitted. Although the respective embodiments of the present invention have been described above, technical ideas other than the claims that can be understood from the respective embodiments will be described below together with their effects.

(A) The monopolar connector according to claim 3, wherein the oxide film is chromium oxide plating. According to this structure, solder does not adhere to the inner surface of the lower portion 2a of the main body, and the insulating property is improved.

(B) The main body 2 is formed in a tubular shape.
The single-pole connector according to any one of to 4. With this configuration, it is possible to reliably hold the male connector L1.

[0041]

As described above in detail, the surface treatment of the inner surface of the lower part of the main body can be performed by an easy process, and the male connector insertion port can be prevented from being blocked by the flow soldering. Can be provided.

[Brief description of the drawings]

FIG. 1 is a front view, a side view, and a vertical sectional view of a single-pole connector according to an embodiment.

FIG. 2 is a development view of a single-pole connector.

FIG. 3 is a bottom view of the single-pole connector mounted on the printed wiring board.

FIG. 4 is a vertical cross-sectional view of a single-pole connector mounted on a printed wiring board.

FIG. 5 is a front view and a side view of a conventional single pole connector.

FIG. 6 is a bottom view of a conventional single-pole connector mounted on a printed wiring board.

FIG. 7 is a vertical sectional view of a conventional single-pole connector mounted on a printed wiring board.

FIG. 8 is a partial vertical sectional view for explaining soldering of a conventional single-pole connector.

[Explanation of symbols]

1 ... Monopolar connector, 2 ... Main body, 2a ... Lower part of main body, 3, 4
... Contact pieces, 6,7 ... Engaging portions, 8,9 ... Terminal portions, 10 ... Teflon as a fluorine compound, 11 ... Printed wiring board, 12 ... Mounting holes, 13 ... Land, L1 ... Male connector, S1 ... Solder.

Claims (4)

[Claims] 1. A main body (2) having contact pieces (3, 4) for contacting a male connector (L1), and a printed wiring board (1) formed at a lower end of the main body (2).
1) A lower part of the main body 2a inserted into the mounting hole 12 formed in 1), and a land 13 formed on the back surface of the printed wiring board 11 so as to project from the lower end of the lower part 2a of the main body. A single-pole connector having terminal portions (8, 9) to be soldered to, wherein the inner surface of the lower portion (2a) of the main body is subjected to a surface treatment for eliminating solder wettability. 2. The single pole connector according to claim 1, wherein a coating is formed as the surface treatment. 3. The single pole connector according to claim 2, wherein the coating is an oxide film. 4. The single-pole connector according to claim 2, wherein the coating film is a fluorine-based compound.