JP2001210407A - Connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connector in which an interference between a protruding portion for positioning of connector and inner cicrumferential edge of a round hole of a substrate can be avoided and in which the reduction in positioning accuracy can be restrained without being demanded of a high accuracy of finishing. SOLUTION: In two protruding portions 4, 5 of the connector for positioning, one protruding portion 4 for positioning is cylindrical and the other protruding portion 5 for positioning is nearly ovally cylindrical, and the diameter C0 of one protruding portion 4 for positioning is smaller than the major axis C1 of the other protruding portion 5, and the major axis direction D1 is nearly orthogonal to the contact array direction D2. When the distance Lc of both the protruding portions 4, 5 for positioning and the distance of round holes 7, 8 of printed circuit board 6 are deviated with each other, the deviation is absorbed so that the interference between protruding portions 4, 5 and an inner circumferential edge of round holes 7, 8 does not occur. On the other hand, because the gap between the other protruding portion 5 for positioning the contact array direction D2 of the large diameter round hale 8 is small, similar to the conventional embodiment, the positioning accuracy of connector to the printed circuit board 6 is not reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connector,
In particular, it relates to a connector that can be surface-mounted on a printed circuit board with high accuracy.

[0002]

2. Description of the Related Art Conventionally, a connector of a type which is surface-mounted on a printed circuit board is known.

The connector includes a box-shaped insulator, a plurality of contacts held by the insulator, and two positioning projections provided on a mounting surface of the insulator.

[0004] The two positioning projections are both cylindrical, but have different diameters.

[0005] A printed circuit board on which this connector is mounted has two positioning projections corresponding to two positioning projections having different diameters.
One round hole (a small-diameter round hole and a large-diameter round hole) is formed.

[0006] The distance between the two positioning projections and the distance between the two round holes are required to be the same length.

When mounting a connector on a printed circuit board,
The small-diameter positioning projection of the connector is inserted into the small-diameter round hole of the printed circuit board, and the large-diameter positioning projection is inserted into the large-diameter round hole of the printed circuit board.

With this arrangement, the mounting direction of the connector is always constant, and the connector is mounted at a predetermined position on the printed circuit board.

[0009]

By the way, when automating the mounting operation of the connector, the gap between the two positioning projections and the two round holes is taken into consideration, and the positioning projection and the round hole are taken into account. In order not to interfere with the inner peripheral edge, the gap between the outer peripheral edge of the positioning projection and the inner peripheral edge of the round hole must be increased.

However, if the gap is increased, the positioning accuracy of the connector with respect to the printed circuit board is reduced. Therefore, it is desirable that this gap is not large in terms of positioning.

The present invention has been made in view of such circumstances, and the problem is that high processing accuracy is not required,
An object of the present invention is to provide a connector that can avoid interference between a positioning projection of the connector and an inner peripheral edge of a round hole of a printed circuit board and can suppress a decrease in positioning accuracy.

[0012]

According to a first aspect of the present invention, there is provided a connector comprising: an insulator;
A plurality of contacts held by the insulator;
And two positioning projections provided on the mounting surface of the insulator, wherein the two positioning projections are
In a connector that can be inserted into two round holes having different diameters formed on a substrate, one of the two positioning projections is cylindrical and the other positioning projection is It is almost oval,
The diameter of the one positioning projection is smaller than the major axis of the other positioning projection, and the major axis direction of the other positioning projection is substantially orthogonal to the arrangement direction of the contacts. .

Since the gap in the contact arrangement direction between the other positioning projection and the large-diameter round hole is larger than the conventional gap between the positioning projection and the large-diameter round hole in the contact arrangement direction, the connector is not used. When mounting on the board, the difference between the interval between the two positioning projections and the interval between the two round holes is absorbed, and interference between the positioning projections and the inner peripheral edge of the round hole is avoided. On the other hand, since the gap in the major axis direction between the other positioning projection and the large-diameter round hole is small as in the conventional example, the positional accuracy of the connector with respect to the substrate hardly decreases.

According to a second aspect of the present invention, in the connector according to the first aspect of the present invention, the diameter of the one positioning projection is smaller than the diameter of the smaller one of the two round holes. And the major axis of the other positioning projection is slightly smaller than the diameter of the larger one of the two round holes.

[0015] A decrease in the positional accuracy of the connector with respect to the substrate is more reliably suppressed, and the contacts of the connector are accurately arranged at predetermined positions on the substrate.

[0016]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of a connector according to an embodiment of the present invention, FIG. 2 is a bottom view of the connector, FIG. 3 is a plan view showing a part of a printed circuit board, and FIG. The figure showing the movable range in the major axis direction of the columnar positioning projection,
FIG. 4B is a view showing the movable range of the substantially cylindrical positioning protrusion in the minor diameter direction.

This connector is a box-shaped insulator 1
And a plurality of contacts 3 held by the insulator 1 and two contacts 3 provided on the mounting surface 1a of the insulator 1.
And two positioning projections 4 and 5.

The insulator 1 has a space (not shown) into which an IC card or the like can be inserted. Fixing legs 9, 10 are provided at both ends of the mounting surface 1a of the insulator 1.
Is held. The fixing legs 9 and 10 are bent in an L-shape so as to make surface contact with the printed circuit board 6.

The contacts 3 are arranged in two rows along the longitudinal direction of the insulator 1. The terminal 3a of the contact 3 is exposed from the insulator 1 to the outside. The terminal portion 3a is bent so that it can be surface-mounted on the printed circuit board 6.

The distance between the two positioning projections 4 and 5 is _Lc.
Are arranged through. Two positioning projections 4,
5 is inserted into the two round holes 7 and 8 of the printed circuit board 6, respectively. One of the positioning projections 4 is cylindrical,
The other positioning projection 5 has a substantially cylindrical shape. The diameter c ₀ of the positioning projection 4 is smaller than the major axis c ₁ of the positioning projection 5. Longitudinal direction D ₁ of positioning projection 5
And contact 3 arrangement direction D ₂ (contact arrangement direction)
Are almost orthogonal to each other.

[0022] printed circuit board 6 is different two round holes 7,8 diameter is formed through the interval L _p. Pads 11 are formed in two rows between the round holes 7 and 8 of the printed circuit board 6. The pad 11 corresponds to the terminal 3a of the contact 3. The diameter c ₀ of the positioning projection 4 is slightly smaller than the diameter of the small-diameter round hole 7 of the printed circuit board 6. The major diameter c ₁ of the positioning projection 5 is slightly smaller than the diameter of the large-diameter round hole 8.

FIG. 5 shows the positioning projection 105 of the conventional example.
Contact arrangement direction D₂FIG. 4 is a diagram showing a movable range of the circumstance. Rank
The positioning projection 105 has a simple columnar shape and a diameter
Long diameter c of the positioning projection 5₁Large diameter round hole
8, contact arrangement direction D ₂And the direction perpendicular to it
D₃Distance δ₂Can only move. In contrast,
Is the positioning projection 5 of this embodiment a long columnar shape?
In the round hole 8, the major axis direction D₁Distance δ₂Can only move
(See FIG. 4A), the contact arrangement direction D₂To distance
Separation δ₁(See FIG. 4B). That is,
δ₁> Δ₂And the positioning projection 5 is compared with the conventional example.
Contact arrangement direction D₂Can travel a long distance.

When the connector is mounted on the surface of the printed circuit board 6, the small-diameter positioning projection 4 of the connector is inserted into the small-diameter round hole 7 of the printed circuit board 6, and the large-diameter positioning projection 5 is inserted into the large-diameter of the printed circuit board 6. Respectively into the round holes 8. Since major axis c ₁ of the positioning protrusion 5 is larger than the diameter of the small diameter of the circular hole 7, it can not be inserted positioning projection portion 8 round hole 7. Therefore, the mounting direction of the connector does not reverse.

The positioning projection 5 and the large-diameter round hole 8
Since much larger than the gap of the contact arrangement direction D ₂ of the gap of the contact arrangement direction D ₂ is a round hole 8 of the large diameter and the positioning projection 105 of the conventional example and, if the interval of the positioning projections 4, 5 L _c and even the distance L _p of round holes 7,8 is deviated, the deviation is absorbed, it does not occur interference with the inner peripheral edge of the positioning projections 4, 5 and round hole 7,8.

On the other hand, the positioning projection 5 and the large-diameter round hole 8
Since the gap of the major axis D ₁ of the same small in the conventional example,
The positional accuracy of the connector with respect to the printed circuit board 6 does not decrease.

According to this embodiment, a low dimensional accuracy of the distance _{L p} of dimensional accuracy and circular holes 7 and 8 of the spacing _{L c} of the positioning projections 4, 5, not both spacing _L c, is _{L p} equals If
Interference between the positioning projections 4, 5 and the inner peripheral edges of the round holes 7, 8 when the connector is mounted on the printed circuit board 6 can be avoided, and a decrease in positioning accuracy can be suppressed. Since high processing accuracy is not required, it contributes to cost reduction.

The positioning projection 8 is substantially in the shape of a long column, and the major diameter c ₁ of the positioning projection 8 is a small-diameter round hole 7.
Is larger than the diameter of
Cannot be inserted into Therefore, erroneous mounting of the connector is prevented.

Further, the holes formed in the printed circuit board 6 may be round holes 7 and 8 having a simple shape which can be processed by a drill.
Processing is easy.

Further, according to the present invention, not only the positional displacement between the pad 11 of the printed board 6 and the connecting portion 3a of the contact 3 of the connector is avoided, but also when a large number of connectors are mounted on the printed board 6. The positional relationship between the connectors becomes appropriate.

Furthermore, the fixing leg portions 9 and 10 provided on the mounting surface 1a of the insulator 1, but the space is limited to placing the positioning projections 5, the positioning projections if they have space to major c ₁ The part 5 can be arranged.

In the above embodiment, the connector having two positioning projections 4 and 5 has been described. However, the present invention can be applied to a connector having three or more positioning projections 4 and 5. .

[0033]

As described above, according to the connector of the first aspect of the present invention, it is possible to avoid interference between the positioning projection of the connector and the inner peripheral edge of the round hole of the substrate without requiring high processing accuracy. In addition to this, it is possible to suppress a decrease in positioning accuracy, which contributes to a reduction in manufacturing cost.

According to the second aspect of the present invention, a decrease in the positional accuracy of the connector with respect to the substrate is more reliably suppressed, and the contacts of the connector are accurately arranged at predetermined positions on the substrate. Defects can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view of a connector according to an embodiment of the present invention.

FIG. 2 is a bottom view of the connector.

FIG. 3 is a plan view showing a part of a printed circuit board.

4A is a diagram showing a movable range of a substantially long columnar positioning projection in the major axis direction, and FIG. 4B is a diagram of a substantially long columnar positioning projection in a minor axis direction movable. It is a figure showing a range.

FIG. 5 is a view showing a movable range of a positioning protrusion of a conventional example in a contact arrangement direction.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Insulator 1a Insulator mounting surface 3 Contact 4 Positioning projection (one positioning projection) 5 Positioning projection (the other positioning projection) 6 Printed circuit board (substrate) 7 Round hole (small diameter round hole) 8 Round hole (large diameter round hole) c ₀ Diameter of positioning projection 4 c ₁ Long diameter of positioning projection 5 D ₁ Long diameter direction of positioning projection 5 D ₂ Contact arrangement direction

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5E023 AA04 AA16 BB22 CC26 GG07 HH01 HH18 5E077 BB23 BB31 DD01 GG04 HH04 JJ11

Claims (2)

[Claims] 1. An insulator comprising: an insulator; a plurality of contacts held by the insulator; and two positioning projections provided on a mounting surface of the insulator.
In a connector that can be inserted into two circular holes having different diameters formed on a substrate, one of the two positioning projections is cylindrical and the other positioning projection is The one positioning protrusion has a diameter smaller than the longer diameter of the other positioning protrusion, and the longer diameter direction of the other positioning protrusion is substantially equal to the arrangement direction of the contacts. A connector characterized by being orthogonal. 2. The diameter of the one positioning projection is:
The diameter of the other one of the two round holes is slightly smaller than the diameter of the small-diameter round hole, and the long diameter of the other positioning protrusion is slightly smaller than the diameter of the large-diameter round hole of the two round holes. The connector according to claim 1, wherein: