JPH1126134A - Manufacture of connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing method of a connector by which sticking of a flux can be prevented as much as possible and coplanarity of a contact lead can also be improved and holding power of a contact can be improved at the same time. SOLUTION: In this method, a connector housing 21 having a contact hole and positioning bosses 22 and 23 is integrally formed, and a contact 40 is positioned and supported, and a bottom plate 30 having positioning holes 31 and 32 to fit/insert the positioning bosses 22 and 23 is integrally formed. The positioning bosses 22 and 23 are also fitted to and inserted into the positioning holes 31 and 32, and the bottom plate 30 is positioned in and supported by a bottom part 21b of the connector housing 21, and the positioning bosses 22 and 23 are also crushed, and the bottom plate 30 is fixed to the bottom part of the connector housing 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method of manufacturing a connector mounted on a printed wiring board or the like.

[0002]

2. Description of the Related Art FIG. 1 is a conceptual perspective view showing a conventional connector 1, and particularly a conceptual perspective view of a connector housing 2 which is mounted on a printed wiring board (not shown) and functions as a receptacle to which a plug (not shown) is fitted. It is.

FIG. 1 shows a state in which the connector housing 2 is turned upside down to facilitate the description.

The connector housing 2 has a plurality of contacts 3 arranged in a row at a predetermined pitch.

In order to manufacture such a connector housing 2, conventionally, as shown in FIG. 1 and FIG. 2 shown in an AA sectional view thereof, a plug is inserted together with a bottom portion 2a thereof by molding means such as injection molding. The concave portion 2b is formed integrally, and then the contacts 3 are press-fitted into the contact mounting holes 2c formed in the bottom portion 2a.

In order to mount the above-described connector housing 2 on a printed wiring board (not shown), the rear end of the contact 3 protruding from the bottom 2a, that is, the contact lead 3a is formed on the printed wiring board (not shown). Then, the contact lead 3a is soldered to the corresponding wiring pattern by using a flux.

[0007]

According to the conventional connector 1 described above, each contact 3 is provided with a contact mounting hole 2c of the connector housing 2 formed in advance.
As shown in FIG. 2, a gap S is easily formed between the contact 3 and the contact mounting hole 2c because the contact lead 3a and the corresponding wiring pattern are formed by using a flux. When performing the soldering process, the molten flux easily moves to the contact portion 3b of the contact 3 through the gap S as shown by the arrow a, so that the conductivity of the contact 3 itself is significantly reduced, and There is a possibility that a connection failure may be caused.

[0008] Conventionally, in order to minimize the adverse effects caused by the movement of the flux, the contact leads 3
After increasing the height h of the contact 3a, applying a flux adhesion preventing material to the contact 3, or soldering the contact lead 3a to the wiring pattern, the contact 3
Complicated post-treatments, such as washing and removing the flux attached to the surface, were required.

If a gap S is formed between each contact 3 and the contact mounting hole 2c, the contact 3 is loosely mounted, and the arrangement of the contact leads 3a is likely to be disturbed (arrow B). Therefore, the regular arrangement of the contact leads 3a, so-called coplanarity, is reduced, and this causes a connection failure in the soldering process between the contact leads 3a and the corresponding wiring patterns.

Further, in the connector in which the pitch of the contacts 3 is reduced and the height of the contacts 3 is reduced, the thickness T of the terminal holding portion C of the connector housing 2 cannot be increased, and a sufficient holding force for the contacts 3 is obtained. Also, it has been difficult to maintain stable electrical connection with the contact of the plug fitted in the recess 2b.

The present invention has been made in view of the above-mentioned circumstances, and has been made in consideration of the above circumstances, to prevent the adhesion of flux as much as possible, to improve the coplanarity of a contact lead, and to improve the contact holding force. It is intended to provide a manufacturing method.

[0012]

In order to solve the above-mentioned problems, according to a method of manufacturing a connector of the present invention, a contact having a bent portion between a contact lead portion and a contact portion is fitted with the contact portion. A step of integrally forming a connector housing having a hole and a positioning boss at the bottom, and positioning and supporting the bent portion of the contact;
And a step of integrally forming a bottom plate having a positioning hole into which the positioning boss is inserted, and fitting the contact portion of the contact into the contact hole of the connector housing, and inserting the positioning hole into the positioning boss. Fitting and positioning the bottom plate to the bottom of the connector housing; and crushing the positioning boss so that the positioning boss and the positioning hole are engaged with each other, whereby the bottom plate is moved to the bottom of the connector housing. And a step of fixing the same.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a method for manufacturing a connector according to the present invention will be described in detail.

FIG. 3 is an exploded sectional view showing a main part of the connector 20 according to the present invention. In particular, a connector housing 21 which is mounted on a printed wiring board (not shown) and functions as a receptacle to which a plug (not shown) fits. It is an assembly exploded sectional view.

The connector housing 21 is formed by means of injection molding or the like with a recess 21a into which a plug (not shown) is inserted and a pair of opposed contacts into which a contact portion of a contact described later is inserted into its bottom 21b. The hole 21c and a pair of positioning bosses 22 and 23 projecting from the bottom center portion 21d are integrally formed.

On the other hand, the bottom plate 30 covering the bottom 21a of the connector housing 21 is also integrally formed by a forming means such as injection molding.

During the integral formation of the bottom plate 30, the contacts 40, which oppose each other and are arranged in a row in the vertical direction in the drawing, are positioned and supported. Bottom center 21
Positioning holes 31 and 32 into which positioning bosses 22 and 23 projecting from d are inserted are also integrally formed at the same time.

In the positioning holes 31 and 32, small diameter portions 31a and 32a and large diameter portions 31b and 32b are integrally formed.

On the other hand, the contacts 40 positioned and supported on the bottom plate 30 are bent substantially in an L-shape, and a cross section is provided between a contact lead portion 40a at the upper end and a contact portion 40b at the lower end. U-shaped bent part 40
Although the c is formed, according to the above-described bottom plate 30, at the time of the integral formation, the stepped portion 30b having a U-shaped cross section for supporting the bent portion 40c of the contact 40 is also integrally formed at the same time.

In FIG. 3, reference numeral 30c denotes a contact 40.
Are formed at the same time when the bottom plate 30 is formed. Reference numeral 21
"e" is a defining plate for restricting the contact portions 40b of the contacts 40 from contacting with each other. The defining plate 21e is also integrally formed when the connector housing 21 is formed.

As described above, the connector housing 21
And a bottom plate 30 covering the bottom 21b are integrally formed by forming means such as injection molding, and then approached to each other as shown by an arrow A in FIG. 3, and contact holes 21c of the connector housing 21 as shown in FIG. The contact portion 40b of the contact 40 positioned and supported on the bottom plate 30 is inserted therein, and the positioning bosses 22 and 23 of the connector housing 21 are formed in the positioning holes 3 formed in the bottom plate 30.
1, 32 are inserted.

Then, as shown in FIG.
Is positioned and supported at a predetermined position on the bottom 21b of the connector housing 21.

After the bottom plate 30 is positioned on the bottom 21b of the connector housing 21 as described above, the tips 22a, 2b of the positioning bosses 22, 23 are positioned as shown in FIG.
When 3a is crushed by processing means such as ultrasonic vibration, the crushed and large-diameter tips 22a and 23a engage with the small-diameter portions 31a and 32a of the positioning holes 31 and 32 formed in the bottom plate 30, As a result, the bottom plate 30 is firmly fixed to the bottom 21b of the connector housing 21.

According to such a connector manufacturing method,
As shown in FIG. 5, since the entire bottom plate 30 including the step portion 30b of the bottom plate 30 is integrally formed by injection molding or the like,
Contact lead 40a and contact lead 40a
The contact lead 40a and the corresponding wiring pattern are melted when performing a soldering process using a flux because a sealing state is formed without forming a gap between the bottom plate 30 and the bottom plate 30 that supports the positioning. Movement of the generated flux from the contact lead 40a to the contact portion 40b is prevented as much as possible, so that the connection failure of the connector 20 can be reduced as much as possible.

The contact lead 40a and the bottom plate 30
Since there is no gap between them and they are sealed and supported, the arrangement of the contact leads 40a is not disturbed, and the regular arrangement, so-called coplanarity, is improved.

Further, the contact lead 40a and the bottom plate 3
0, no gap is formed and the connector is sealed. Therefore, even in a connector in which the pitch of the contacts 40 is narrowed and the height is reduced, even if the thickness of the terminal holding portion C of the bottom plate 30 is small, the contacts can be sufficiently contacted. Thus, a holding force of 40 can be secured.

[0027]

As described above, according to the connector manufacturing method of the present invention, the connector housing having the contact hole and the positioning boss is integrally formed, the contact is supported for positioning, and the positioning boss is inserted. A bottom plate having a positioning hole to be formed is integrally formed, a positioning hole is inserted into a positioning boss, and the bottom plate is positioned and supported on the bottom of the connector housing. Since it is fixed, there is no gap between the contact lead and the bottom plate.Therefore, when soldering the contact lead and the corresponding wiring pattern using flux, the molten flux Of the connector is prevented as much as possible. Sealed, it is possible to provide a connector to exhibit a stable function.

Further, when the soldering process is performed on the contact lead and the corresponding wiring pattern using the flux, the molten flux is prevented as much as possible from moving to the contact portion of the contact. In order to prevent the adverse effects of flux movement as much as possible with conventional connectors, the height of the contact leads must be increased, or a flux adhesion preventing material must be applied to the contacts, or the solder between the contact leads and the wiring pattern must be soldered. After the attachment process,
Since a complicated process such as cleaning and dropping of the flux adhered to the contact is not required, the manufacturing process is simplified, and a connector that maintains a stable function can be provided at low cost.

Since there is no gap between the contact lead and the bottom plate, there is no play in the contact lead.
Therefore, the arrangement of the contact leads is not disturbed, and the regular arrangement of the contact leads, that is, the so-called coplanarity is improved, and the occurrence of soldering failure between the contact leads and the corresponding wiring pattern is prevented as much as possible. Can also.

Further, since no gap is generated between the contact lead and the bottom plate, in a connector in which the pitch of the contacts is reduced and the height is reduced, it is sufficient even if the thickness of the terminal holding portion of the connector housing is reduced. It is also possible to provide a small-sized connector that provides a holding force for the contacts and thus maintains a stable electrical connection with the contacts arranged on the plug.

[Brief description of the drawings]

FIG. 1 is a conceptual perspective view of a conventional connector.

FIG. 2 is a sectional view taken along the line AA in FIG.

FIG. 3 is an exploded sectional view of a main part of the connector according to the present invention.

FIG. 4 is a sectional view showing a method of assembling the connector according to the present invention.

FIG. 5 is a sectional view showing a method of assembling the connector according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 21 ... Connector housing 21b ... Bottom part 21c ... Contact hole 22, 23 ... Positioning boss 30 ... Bottom plate 31, 32 ... Positioning hole 31a, 32a ... Small diameter part 31b, 32b ... Large diameter part 40 ... Contact 40a ... Contact lead part 40b ... Contact 40c ... Bend

Claims (3)

[Claims] A step of integrally forming a connector housing having a contact hole for inserting the contact portion of a contact having a bent portion between the contact lead portion and the contact portion, and a positioning boss at a bottom portion; A step of integrally supporting a bottom plate having a positioning hole into which the bent portion of the contact is positioned and having the positioning boss inserted therein, and fitting the contact portion of the contact into the contact hole of the connector housing; Inserting the positioning holes into the positioning bosses, and positioning and supporting the bottom plate to the bottom of the connector housing; crushing the positioning bosses to engage the positioning bosses with the positioning holes; Fixing the bottom plate to the bottom of the connector housing by this. Manufacturing method. 2. The method according to claim 1, wherein the bent portion of the contact is formed in a U-shaped cross section. 3. The positioning hole has a large diameter portion and a small diameter portion, and the crushed positioning boss has a large diameter and engages with the small diameter portion of the positioning hole. 1)
The manufacturing method of the connector described in the above.