JP5245597B2 - connector - Google Patents

Description

The present invention relates Kadoe' Jikonekuta that the ground pin and signal pin is a plurality of pairs arranged in the longitudinal direction of the housing with a predetermined pitch forms a pair, and more particularly to a contact pin tail structure.
More specifically, the present invention is, for example, a card edge connector that is surface-mounted on the edge of a printed circuit board in a test head of an LSI test system, and is connected to a connector for interfacing with a DUT (Device Under Test). The present invention relates to the structure of a high-density, high-frequency connector arranged in a row along the substrate edge.

  Prior art documents related to the card edge connector include the following.

Sumitomo 3M Home Page / Products and Services / Electrical / Electronic / Power / Communication / Electrical / Electronic Products / Connectors / Mounting IC Sockets [Search July 9, 2008] Internet <URL: http://www.mmm.co. jp / electrical / connector / index.html> JP 2008-091047 A JP 2008-117706 A

  9A and 9B are diagrams illustrating the configuration of a main part of a conventional example that is generally used conventionally. FIG. 9A is a front view, FIG. 9B is a bottom view, and FIG. FIG. 11 is an explanatory diagram of a main part configuration of an example in which the conventional apparatus is actually used, FIG. 12 is a component explanatory diagram of FIG. 11, showing a printed circuit board, (a) is a plan view, and (b) is a side view. FIG. 13 is a component explanatory diagram of FIG. 11 showing a connector harness, where (a) is a front view, (b) is a right side view, (c) is a left side view, and FIG. 14 is an operation explanatory diagram of FIG. .

9 and 10, in the card edge connector 1, a plurality of pairs of ground pins 2 and signal pins 3 arranged on a vertical line are arranged in the longitudinal direction of the housing 4 with a predetermined pitch.
FIG. 11 is an explanatory view of the main configuration of an example in which the conventional apparatus is actually used.
The card edge connector 1 is attached to the printed circuit board 20, and the connector harness 10 shown in FIG. 13 is fitted into the card edge connector 1.
Reference numeral 16 denotes a carrier housing that aligns and protects the connector harness 10.

  As shown in FIG. 13, the connector harness 10 has a coaxial cable 11 joined thereto, the coaxial signal line is connected to the signal socket 12 in the connector harness 10, and the shield line of the coaxial cable 11 is a shield box that covers the connector harness 10. 13 and a ground socket 14 in the connector connector harness 10 and a ground clip 15 is attached.

The connector harness 10 includes a ground socket 14, a signal socket 12, and a ground clip 15 from the upper side of FIG.
However, since this connector harness 10 is covered with the shield box 13, it is pseudo coaxial.

  In the card edge connector 1 shown in FIG. 9 and FIG. 10, when the connector harness 10 shown in FIG. 13 is fitted, in the AA sectional view of FIG. The signal socket 12 fits on the lower side in the drawing, and the ground socket 14 fits on the longer contact pin on the upper side in the drawing.

Then, it is transmitted in parallel in the header of the card edge connector 1 as it is, and joined to the pads in the mounting pattern diagram of the printed circuit board 20 shown in FIG.
In FIG. 12, the pads are shown as a ground plane 21, a signal pad 22, and a ground plane 23 in contact with the ground clip 15 at the bottom.

Such an apparatus has the following problems.
As shown in FIG. 9, the structure of the signal pin 3 and the ground pin 2 in the header of the card edge connector 1 is such that the ground pin 2 sandwiches the signal pin 3 only in the vertical direction in the drawing.

Therefore, when the signal pin 3 is hidden by the ground pin 2 in the longitudinal direction of the card edge connector 1 and it is necessary to repair the signal pin 3 such as a mounting failure, the signal pin 3 is blocked by the ground pin 2 and soldered. Cannot apply 鏝, and rework is not possible when mounting failure occurs.
Further, as schematically shown in FIG. 14, the shielding performance in the left-right direction in the drawing was insufficient.

  An object of the present invention is to solve the above-described problems, and to provide a connector capable of improving the workability of repair and improving the signal transmission characteristics by improving the shielding performance.

In order to achieve such a problem, in the present invention, in the connector of claim 1,
In a connector in which a plurality of pairs of ground pins and signal pins arranged on a vertical line form a pair with a predetermined pitch in the longitudinal direction of the housing, the rear ends are arranged in parallel to the paired signal pins in the vertical direction. A pin tip supported by the housing, a pin bend at one end connected to the rear end of the pin tip, bent in the longitudinal direction of the housing, and fixed to the housing; and The other end of the signal pin is connected to the other end and arranged in parallel in the horizontal direction with a half pitch shift with respect to the paired signal pins, and the one end is supported by the housing to improve the shielding effect. It is characterized by comprising a ground pin having a pin rear end shape and the pin rear portion formed in a stepped shape so as to be equidistant .

According to claim 1 of the present invention, there are the following effects.
In the connector of the present invention, the header of the connector is surface-mounted on the pads formed in a row on the printed circuit board.
However, since the printed circuit board is plate-shaped, it is likely to warp, and the connector header itself is also long, so it tends to warp in the longitudinal direction.

  Therefore, when the connector is surface-mounted on a printed circuit board, solder mounting defects are likely to occur. However, even in such a case, the signal pin is not blocked by the ground pin, and the connector that improves the workability of reworking the header and facilitates it. Is obtained.

A coaxial cable is used as a transmission line for transmitting a high-frequency signal, but the terminal is usually a connector, but it is often difficult to maintain the coaxiality of the connector part. .
When it is contacted as a coaxial transmission line, the pin tail portion of the contact to the surface mounting board of the header portion of the connector is configured such that the ground pin further surrounds the signal pin, although the insulating layer is air, A connector that can further improve impedance matching as a high-frequency transmission line is obtained.

  In addition, the pad pattern on the surface mount board can be arranged in a staggered pattern, and both the signal pad and ground pad can be drawn linearly inside the board, so the signal pad pattern is particularly free of wiring on the surface mount board. Thus, a connector that can be expected to improve signal quality can be obtained.

  In addition, a high numerical value is often required for the insulation resistance between the signal lines and between the signal lines and the ground, and in many cases, the leakage current on the surface of the substrate becomes dominant. Since the actual distance between the signal pad and the ground pad can be longer than that of the conventional example, a connector capable of increasing the insulation resistance value can be obtained.

  Next, in the low frequency signal path and DC signal path, it is not necessary to designate the signal line and the ground line as a signal pin and a ground pin, the pad pattern of the surface mounting board is staggered, and the distance between adjacent pads is increased. In addition, the ground plane at the edge of the board is no longer necessary, and a guard pattern can be additionally placed to reduce leakage current. A connector that can be expected to be stable and improved is obtained.

Connector pin rear end of grayed round pins, as the shielding effect is improved, because it was formed in a stepped shape such that the pin rear portion shape and equidistant signal pin, which is further enhanced shielding effect Is obtained.

  This shielding effect can suppress the mismatch amount of the characteristic impedance of the signal line exposed to the air, and a connector having an effect of improving and stabilizing the signal quality as a high-frequency signal transmission line can be obtained.

Hereinafter, the present invention will be described in detail with reference to the drawings.
1A and 1B are explanatory views of the configuration of the main part of one embodiment of the present invention. FIG. 1A is a front view, FIG. 1B is a plan view, FIG. 1C is a bottom view, and FIG. FIG. 3 is a cross-sectional view taken along the line CC in FIG. 1A, FIG. 4 is an explanatory diagram of a main part of an example when the apparatus of the present invention is actually used, and FIG. 6 shows the printed circuit board, FIG. 6 is an operation explanatory view of FIG. 1, FIG. 7 is a component explanatory view of FIG. 1, and shows a solder tab, (a) is a front view, (b) is a left side view, and (c) is a bottom view. It is.
In the figure, the same symbol structure as in FIG. 9 represents the same function.
Only the differences from FIG. 9 will be described below.

1 to 3, the ground pin 31 has a pin front end portion 311, a pin bent portion 312, and a pin rear end portion 313.
As shown in FIG. 3, the pin front end portion 311 is arranged in parallel with the signal pin 3 making a pair in the vertical direction, and the rear end is supported by the housing 314.

One end of the pin bent portion 312 is connected to the rear end of the pin tip portion 311, the pin bent portion 312 is bent in the longitudinal direction of the housing 314, and is fixed to the housing 314.
One end of the pin rear end portion 313 is connected to the other end of the pin bent portion 312 and is disposed parallel to the pair of signal pins 3 in the horizontal direction with a half-pitch shift by a predetermined pitch P1, and one end is a housing. 314 is supported.

  In short, as shown in FIG. 1, the connector 30 of the present invention is arranged vertically in the order of the ground pin 31 and the signal pin 3 from the top and bottom in the figure, but the upper side in the mold resin of the housing 314 The pin rear end portion 313 arranged in the horizontal direction is shifted by a half pitch in the horizontal direction, and the pin rear end portion 313 shifted by a half pitch is solder mounted on the pad pattern shown in FIG. .

FIG. 2 shows a cross-sectional view taken along the line BB of FIG. FIG. 2 shows a state where the pin rear end portion 313 arranged on the upper side is shifted by a half pitch in the direction perpendicular to the drawing inside the mold resin of the housing 314.
FIG. 3 shows a cross-sectional view taken along the line CC of FIG. 3 is a sectional view of the height at which the pin rear end portion 313 is located, and the hatched portion is the mold resin of the housing 314 and the ground pin 311 is shifted by a half pitch in the pitch direction in the mold resin, and the pin rear end portion 313 shows a state connected to H.313.

  The signal pin 3 that cannot be seen under the ground pin 311 is not offset, so that the pin 3 goes straight through the mold resin and is connected to the rear end of the signal pin 3.

FIG. 4 is an explanatory view of the main configuration of an example when the connector of the present invention is actually used.
The connector 30 of the present invention is attached to the printed circuit board 40, and the connector harness 10 shown in FIG. 13 is fitted into the connector 30 of the present invention.
Reference numeral 16 denotes a carrier housing that aligns and protects the connector harness 10.

FIG. 5 shows a pad pattern of a printed circuit board on which the card edge connector of the present invention is mounted.
The ground plane 23 to which the ground clip 15 attached to the shield box 13 of the connector harness contacts is the same arrangement as in the conventional example of FIG.
Further, the arrangement of the signal pads 22 with which the pin tail of the signal pin 3 contacts is the same as that of the conventional example of FIG.

The signal pin 3 is arranged so as to be the shortest including the contact tail portion, and the signal pad 22 is located immediately below from the position where the signal pin 3 comes out of the molding resin of the housing 314.
The pin rear end 313 of the ground pin 31 that makes a pair with the signal pin 3 contacts the ground pad 41 arranged at a position shifted by a half pitch.

Therefore, the pad pattern is staggered so that the ground pads 41 surround the signal pads 22 as compared with the conventional example of FIG.
FIG. 6 schematically shows the arrangement of the ground pins 31 and the signal pins 3 as viewed from the pin tail side of the connector.

In the above configuration, in the conventional example of FIG. 14, one ground pin paired with one signal pin serves as a shield, but there is only one ground pin on the top of the signal pin, and in the left-right direction. There is no shielding effect.
In FIG. 6, two ground pins that are equidistant from one signal pin serve as a shield and are arranged close to the coaxial structure.

In FIG. 1, the housing 34 has solder tabs 45 at both left and right ends.
As shown in FIG. 7, the solder tab 45 is made of a metal piece, has a function of being surface-mounted on the printed circuit board 20, and has an effect of improving the strength of solder bonding with the printed circuit board 20, and is also composed of a metal piece. In addition, it has the effect of maintaining the weight balance of the connector with the pin tail.
Because of this effect, when the connector is surface-mounted on the printed circuit board 20, stable solder mounting can be achieved without tilting back and forth and left and right.
7A is a front view, FIG. 7B is a left side view, and FIG. 7C is a bottom view.
46 is a solder pad provided on the printed circuit board 20.

Furthermore, when the connector harness 10 is inserted into or removed from the connector, a certain force is applied in the front-rear direction. This force is applied to the solder joint surfaces of the signal pins 3 and the ground pins 31 by the solder joint surfaces of the solder tabs 45. To compensate for the shear stress applied to
For this reason, it is possible to avoid a situation where the solder joint surface of the pin tail of the signal pin 3 or the ground pin 31 to which the signal or the ground is originally transmitted is broken.

As a result, the connector of the present invention is surface-mounted on the pads 21 and 22 generated in a row on the printed circuit board 20.
However, since the printed circuit board 20 is plate-shaped, it is likely to warp, and the connector itself is long, so that it is likely to warp in the longitudinal direction.

  Therefore, when the connector is surface-mounted on the printed circuit board 20, solder mounting failure is likely to occur. However, even in such a case, the signal pin 3 is not blocked by the ground pin 31, and the workability of reworking the connector is improved and easy. A connector is obtained.

  In addition, the coaxial cable 11 is used as a transmission line for transmitting a high-frequency signal, but the terminal is mostly a connector, but the connector part is exposed, and the coaxiality can be maintained. Often difficult.

  When the contact is made as a coaxial transmission line, the pin tail portion of the contact to the surface mounting board of the connector is configured such that the ground pin 31 further surrounds the signal pin 3 although the insulating layer is air, so that the high frequency A connector that can further improve impedance matching as a transmission line is obtained.

  Further, the pad pattern of the surface mounting substrate can be arranged in a staggered manner, and both the signal pad 22 and the ground pad 41 can be linearly drawn out to the inside of the substrate. A connector that can increase the degree of freedom of wiring and can be expected to improve signal quality is obtained.

  In addition, a high numerical value is often required for the insulation resistance between the signal lines and between the signal lines and the ground, and in many cases, the leakage current on the surface of the substrate becomes dominant. Since the actual distance between the signal pad 22 and the ground pad 41 can be longer than that of the conventional example, a connector capable of increasing the insulation resistance value can be obtained.

  Next, in the low frequency signal path and the DC signal path, it is not necessary to designate the signal line and the ground line as a signal pin and a ground pin, and the pad patterns 22 and 41 on the surface mounting substrate are arranged in a staggered manner and between adjacent pads. Since the distance can be increased, and the ground plane 23 at the edge of the substrate is not required, and a leakage current can be reduced by additionally arranging a guard pattern, thereby increasing the degree of freedom of wiring. Thus, a connector that can be expected to stabilize and improve the signal quality can be obtained.

FIG. 8 is an explanatory view of the main part configuration of another embodiment of the present invention.
In FIG. 8, the pin rear end portion 51 of the ground pin 50 is formed in a step shape so as to be equidistant from the pin rear end shape of the signal pin 3 so as to improve the shielding effect.

As a result, the pin rear end portion 51 of the ground pin 50 is formed in a step shape so as to be equidistant from the pin rear end shape of the signal pin 3 so that the shield effect is improved. A connector with improved resistance can be obtained.
This shielding effect can suppress the mismatch amount of the characteristic impedance of the signal line exposed to the air, and a connector having an effect of improving and stabilizing the signal quality as a high-frequency signal transmission line can be obtained.

The above description merely shows a specific preferred embodiment for the purpose of explanation and illustration of the present invention.
Therefore, the present invention is not limited to the above-described embodiments, and includes many changes and modifications without departing from the essence thereof.

It is principal part structure explanatory drawing of one Example of this invention. It is BB sectional drawing of FIG. It is CC sectional drawing of FIG. It is principal part structure explanatory drawing of an example when this invention apparatus is actually used. It is component explanatory drawing of FIG. It is operation | movement explanatory drawing of FIG. It is component explanatory drawing of FIG. It is principal part structure explanatory drawing of the other Example of this invention. It is structure explanatory drawing of the prior art example generally used conventionally. It is AA sectional drawing of FIG. It is principal part structure explanatory drawing of an example in which this conventional apparatus is actually used. It is component explanatory drawing of FIG. It is component explanatory drawing of FIG. It is operation | movement explanatory drawing of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Card edge connector 2 Ground pin 3 Signal pin 4 Housing 10 Connector harness 11 Coaxial cable 12 Signal socket 13 Shield box 14 Ground socket 15 Ground clip 16 Carrier housing 20 Printed circuit board 21 Ground pad 22 Signal pad 23 Ground plane 30 Connector of this invention 31 Ground Pin 311 Pin Tip 312 Pin Bend 313 Pin Rear End 314 Housing 40 Printed Circuit Board 41 Ground Pad 45 Solder Tab 46 Solder Pad 50 Ground Pin 51 Pin Rear End P1 Pitch

Claims (1)

In the connector in which a plurality of pairs of ground pins and signal pins arranged on the vertical line are arranged in the longitudinal direction of the housing with a predetermined pitch.
A pin tip portion arranged in parallel in the vertical direction to the paired signal pins and having a rear end supported by the housing;
One end is connected to the rear end of the pin tip, and the pin is bent in the longitudinal direction of the housing and fixed to the housing;
One end is connected to the other end of the bent portion of the pin, the half of the predetermined pitch is shifted with respect to the pair of signal pins and arranged in parallel in the horizontal direction, and the one end is supported by the housing to improve the shielding effect. Thus, a connector comprising a ground pin having a pin rear end portion formed stepwise so as to be equidistant from the pin rear end shape of the signal pin .