JPH06104033A - Surface mounting type connector - Google Patents

Abstract

PURPOSE:To automate mounting work to a board and to improve productivity by additionally forming an arm, which can be cut, and which is provided with the weight corresponding to that of a plug contact region protruded from the end side of the board. CONSTITUTION:A connector 2 comprises two kinds of plurality of plug terminals 11, 12, and an insulator 21 for providing the terminals. An arm 21b is additionally formed on the insulator 21 on each front end part of the both side leg parts in the width direction in both sides through a V-shape notch 21a. A weight 22 is embedded in the arm 21b, and it is prevented from at least being dropped by its tare when the connector 2 is loaded on the side of an end side 23a of a board 23. Suction is stopped by a vacuum suction head of an automatic system at this point, and the connector 2 is not dropped even at the time of withdrawal, and the connector 2 can be mounted on the board 23 by a reflow soldering device 17 in the next process. An arm 21b that is curved several times is removed by the notch 21a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a surface mount type connector mounted on an edge of a circuit board (hereinafter simply referred to as a board), and particularly to a board by an automatic machine equipped with a handling head for vacuum suction or the like. The present invention relates to a surface mount connector that facilitates mounting work and improves productivity.

In the field of electronic equipment in recent years, in order to meet the demand for downsizing of devices, a surface mounting technique that is easy to work and has a small occupied area is frequently used for mounting means for mounting electronic components mounted on the substrate. Is starting to appear.

In this case, the surface mount type connector (hereinafter simply referred to as a connector) mounted on the board is made as small as possible to reduce the area occupied by the board.
The surface mount type connector for mounting the edge of the board, which has been put into practical use in response to the purpose, has come to be widely used.

[0004]

2. Description of the Related Art FIG. 3 is a diagram for explaining an example of a conventional connector configuration together with a method of mounting on a board, and FIG. 4 is a diagram for explaining problems.

In each of the drawings, a case will be described as an example in which plug-side connectors having plug terminals located in a matrix of two rows are mounted on a substrate. In Fig. 3, (3-1) shows a schematic example of the connector configuration together with the board, and (3-2)
Shows the state of mounting on the board, and (3-3) shows the solder connection method to the board.

In (3-1) of FIG. 3, the connector 1 is formed by forming straight plug contacts 11a and 12a at one end, and then offset-bending from the contact portions through fixing portions 11b and 12b having bulges. A plurality of two types of plug terminals 11 and 12 made of a conductor metal such as copper alloy, which are formed on the external connection terminals 11c and 12c having a tongue shape at the other end, and the terminals 11 and 12 are connected to their plug contacts 11a, 12a is an insulator 14 having a concave shape in a plan view, which is planted so as to be arranged in two rows in parallel with each other in a matrix.

The plug terminals 11 and 12 are square holes formed in two rows in a predetermined area excluding the legs of the insulator 14.
14a, so that the same terminals are aligned in the row
It is designed to be positioned and fixed to the insulator 14 by press-fitting 11b, 12b, but each external connection terminal 11c, 12c of each plug terminal 11, 12 when fixed by the fixing portion 11b, 12b.
The bonding surface of the substrate with respect to the substrate is arranged in a matrix of two rows on the same surface.

In addition, the insulator 14 has a concave step surface 14b which can be positioned with respect to the substrate by being brought into contact with the edge of the substrate on the joint surface side to the substrate, and the concave surface of the concave portion is formed. Near the both ends in the longitudinal direction of the stepped surface 14b, a board fixing piece 15 formed by bending a tongue-shaped spring plate material in the plate thickness direction in a mountain shape is formed so that the mountain-shaped parts face each other outward.
It is provided so as to project from b.

Therefore, each plug terminal 11 and 12 is connected to the above-mentioned insulator.
The connector 1 shown in the figure can be constructed by press-fitting into each of the square holes 14a of 14 and fixing to the insulator 14. On the other hand, the board 16 on which the connector 1 is mounted is positioned at a position corresponding to the joint surface of each external connection terminal 11c, 12c when the connector 1 is positioned by abutting the edge 16a with a concave step forming surface. Electrode pads 16 connected to electronic components (not shown) on the substrate 16
The b is formed with solder, and square holes 16c into which the board fixing pieces 15 can be inserted are provided at respective positions corresponding to the two board fixing pieces 15 of the connector 1.

The two square holes 16c and the two board fixing pieces 15 of the connector 1 are displaced when the connector 1 positioned and placed on the board 16 is depressed. It is formed so as to maintain the relative position so that it can be fixed to the substrate 16.

Therefore, the connector 1 is connected to its external connection terminal.
The connector 1 is mounted on the board 16 by lowering the bonding surfaces of 11c and 12c so as to correspond to the electrode pads 16b of the board 16 as shown by the arrow A, and mounting the connector 1 on the board 16 as shown in (3-2). Can be fixed at 16.

Then, as in (3-3), the connector 1 is passed through the inside of a normal reflow soldering device 17 which uses hot air, infrared rays or the like as a heat source together with the board 16 to, for example, 215 ° C. or 260
The connector 1 can be mounted on the substrate 16 by heating to about ° C.

[0013]

Mounting of the connector 1 having such a configuration on the substrate 16 is generally handled by an automatic machine.

FIGS. 4A to 4C for explaining the problems show the mounting process of the connector 1 on the board 16 described in (3-1) of FIG. 3 in a time series manner. For example, as shown in (4-1), after the connector 1 housed in a stocker (not shown) is sucked by the vacuum suction head 18 of the automatic machine on the surface of the insulator, the substrate 16 is positioned and fixed in advance. The connector 1 is temporarily mounted on the board 16 by handling the board fixing piece 15 of the connector 1 and the square hole 16c of the board 16 by handling the board 1 to the predetermined position as indicated by arrow B ₁ (4-2). State.

At this point, when the vacuum suction head 18 stops its vacuum suction and is retracted as shown by arrow B ₂ , the substrate
Since the weight of the plug contact area protruding from the board edge of the connector 1 provisionally mounted on the board 16 is larger than the weight of the area located on the board 16, the connector 1 has an arrow C.
Therefore, immediately before the vacuum suction by the vacuum suction head 18 is stopped, the insulator surface corresponding to the position of the board fixing piece of the connector 1 is pressed by a jig or a manual pressure (P). At the same time, by retracting the vacuum suction head 18 like B ₂ , the connector 1 can be mounted and fixed to the substrate 16 as shown in (4-3).

This means that a handling step by a vacuum suction head of an automatic machine and a pressing and fixing step for the connector are required. Therefore, the conventional connector cannot be mounted on a substrate only by an automatic machine having a vacuum suction head, and a pressing and fixing process for the connector is required, so that improvement in productivity cannot be expected. there were.

[0017]

SUMMARY OF THE INVENTION The above-mentioned problems are solved by a tongue-shaped external member which forms one end of a plurality of plug terminals or jack terminals of a plug connector or a jack connector which is positioned and mounted along an edge of a circuit board. Each of the connection terminals is formed so as to be aligned with the surface of the circuit board after protruding from a predetermined wall surface of the insulator, and is formed at a position corresponding to each of the external connection terminals near the edge of the circuit board. A surface mount type connector, which is mounted on the circuit board by joining the external connection terminals of the plug terminal or the jack terminal to the electrode pad in a state of being in contact with each other, and implanting the plug terminal or the jack terminal. An insulator having a flat surface is provided with arms extending from both ends in the longitudinal direction toward the circuit board side and capable of being removed from the insulator body by repeated bending operations. Is accomplished by surface mount connector.

[0018]

The connector is constructed such that the connector can be stably positioned without dropping from the substrate even when the vacuum suction head is retracted after the handling of the connector by the vacuum suction head of the automatic machine is completed. Then, it can be sent to the reflow soldering device in the next step without the pressing and fixing step by the jig or the manual explained in FIG.

Therefore, in the present invention, a releasable arm having a weight corresponding to at least the weight of the plug contact region protruding from the edge of the substrate is additionally formed on the insulator of the connector to form the connector. .

In this case, the connector mounted on the board is stably positioned on the board by the additionally formed arm. Therefore, the connector having the arm can be mounted on a substrate by a conventional automatic machine having a vacuum suction head, and the soldering process can be performed by the reflow soldering device described in FIG. 3 while the suction head is retracted. Therefore, by cutting off the arm thereafter, a connector having a small board-occupying area can be mounted on the board without a pressing step by a jig or a manual.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a diagram for explaining a connector configuration example according to the present invention together with a board mounting method. Like FIG. 3, (1-1) schematically shows a connector configuration example together with a board, 2) shows the solder connection method to the board, and (1-3) shows the arm excision method.

FIG. 2 is a diagram showing another structural example of the connector according to the present invention. In each of the drawings, the same plug connector as that in FIG. 3 is taken as an example, and therefore, the same target members and parts as those in FIG. 3 are designated by the same reference numerals and the duplicate description will be omitted.

In (1-1) of FIG. 1, the connector 2 includes a plurality of plug terminals 11 and 12 of the two types described in FIG.
It is composed of an insulator 21 for implanting 1,12 in the same manner as in FIG. In particular, the insulator 21 in this case has the board fixing piece 15 provided on the insulator 14 described in FIG. Arms 21b extending in the leg extension direction are additionally formed through V-shaped notches 21a formed on both sides in the direction.

Further, a weight 22 in the form of a cylinder, for example, for making the arm 21b heavy is embedded in the substantially central portion of the arm 21b by an ordinary mold-in technique or the like. 21b is the edge of the substrate 23
The connector 2 mounted on the 23a side in the same manner as in FIG. 3 is set to have a weight so that at least the connector 2 does not drop by its own weight.

Therefore, as shown in FIG.
As shown in FIG. 3, the plug terminals 11 and 12 are press-fitted into the same rectangular holes 14a and fixed to the insulator 21.
Can be configured.

On the other hand, the board 23 on which the connector 2 is mounted is obtained by removing only the square holes 16c of the board 16 described in FIG. Therefore, for example, the area indicated by the broken line D on the surface of the insulator of the connector 2 is sucked and handled by the vacuum suction head of the automatic machine described in FIG. 4, and each electrode pad 6b of the substrate 23 is handled.
And the external connection terminals 11c, 12c of the connector 2 are lowered at a position corresponding to each other as indicated by an arrow A, so that the connector 2 is placed on the substrate.
However, since the connector 2 in this case is formed with the arm 21b having a weight, even if the suction by the vacuum suction head is stopped and retracted, the board 23 of the connector 2 described in FIG. The connector 2 can be mounted on the board 23 in a stable state without dropping from the board.

Next, as shown in (1-2), the connector 2 can be mounted on the board 23 by passing the connector 2 together with the board 23 through the normal reflow soldering device 17 as described in FIG. Yes, but the arm 21b is free.

Therefore, each arm of the connector 2 after mounting
21B can be bent multiple times around the V-shaped notch 21a as shown by arrow E in (1-3) to remove only the arm 21b, and a connector similar to that shown in FIG. 3 can be constructed.

In the connector having such a structure, a board fixing piece or a jig or a manual pressure fixing step as a fixing means to the board, which is required in the conventional mounting step of the connector 1 on the board, is unnecessary. Also, improvement in productivity can be expected by reducing the number of steps.

When an obstacle such as a circuit pattern or another electronic device is located in a region on the substrate corresponding to the existing region of the arm 21b or the bending range thereof, the substrate contact surface side of the arm 21b is located. In the portion corresponding to the obstacle of, to form a concave step surface that can avoid these,
The arm 21b can be made to have such a length as to avoid these obstacles, and the weight 22 embedded in the arm 21b can be changed.

Further, a weight embedded in the arm 21b.
By removing 22 or changing its size and weight, it can be made to correspond to any size connector, and for example, the tongue-shaped external connection terminal part of each plug terminal can be slightly projected to the board side. If formed, the external connection terminal can be brought into contact with the electrode pad when the connector is mounted on the board, so that the molding variation in the external connection terminal portion can be absorbed and reliable soldering in the next step can be achieved. There is a merit that attachment work can be realized.

FIG. 2 showing another structural example of the connector according to the present invention is shown in a state when it is mounted on a substrate. That is, in FIG. 2, the connector 3 is composed of a plurality of plug terminals 11 and 12 of the above-mentioned two kinds and an insulator 31 in which the terminals 11 and 12 are implanted in the same manner as in FIG.

In this case, the insulator 31 has V-shaped notches 31a for cutting off the arm 31b similar to the arm 21b described in FIG. 1 on both sides in the thickness direction (vertical direction in the figure) of the arm 31b. The arm 31b is formed so thin that a gap α is formed on the substrate contact surface side.

In the connector 3 composed of such an insulator 31, since the bending direction for cutting off the arm 31b is the vertical direction of the substrate, the arm is easily affected by the circuit pattern on the substrate 23 and the electronic device. There is a merit that 31a can be excised.

[0035]

As described above, according to the present invention, it is possible to provide a surface mount type connector which realizes easy mounting work on a substrate by an automatic machine equipped with a handling head and improves productivity.

In the description of the present invention, the V-shaped notch is provided on the arm base of the insulator, but the V-shaped notch may be replaced with another notch shape such as a semicircular notch. The effect of can be obtained.

In the description of the present invention, the case where the plug connector is mounted on the substrate is illustrated, but it is clear that the same effect can be obtained even if the plug connector is replaced with a jack connector.

[Brief description of drawings]

FIG. 1 is a diagram illustrating a connector configuration example according to the present invention together with a board mounting method.

FIG. 2 is a diagram showing another configuration example of the connector according to the present invention.

FIG. 3 is a diagram for explaining a conventional connector configuration example together with a method of mounting on a board.

FIG. 4 is a diagram illustrating a problem.

[Explanation of symbols]

2,3 Surface mount type connector 11,12 Plug terminal 14a Square hole 16b Electrode pad 17 Reflow soldering device 21,31 Insulator 21a, 31a V-shaped notch 21b, 31b Arm 22 Weight 23 Circuit board 23a Edge

Claims (3)

[Claims] 1. A predetermined wall surface of an insulator is a tongue-shaped external connection terminal that forms one end of a plurality of plug terminals or jack terminals of a plug connector or a jack connector that is positioned and mounted along an edge of a circuit board. The plug terminals or the jacks are formed so as to be aligned with the surface of the circuit board after protruding from the electrode board and formed on the electrode pads at positions corresponding to the external connection terminals near the end sides of the circuit board. A surface mount type connector that is mounted on the circuit board by joining the external connection terminals of the terminals in contact with each other, and is a flat surface for implanting plug terminals (11, 12) or jack terminals. The insulator (21, 31) comprises arms (21b, 31b) extending from both ends in the longitudinal direction thereof toward the circuit board (23) and removable from the insulator body by repeated bending operations. thing Surface mount connector characterized. 2. A V-shaped or semi-circular cut formed in the arm body in the width direction or the thickness direction of the insulator body, wherein the means for removing from the insulator main body, which is provided in the arm (21b, 31b) according to claim 1. Surface mount type connector characterized by being composed of (21a, 31a). 3. A surface mount type connector, wherein the arm (21b, 31b) according to claim 1 is configured to include a weight (22).