JPH07161415A - Electric connector and electric contact using this connector - Google Patents

Abstract

PURPOSE:To provide an electric contact having high impedance-matching capability accommodating for acceleration of high speed of electric signals and simple structure and provide an electric connector using this electric contact. CONSTITUTION:An electric connector has an insulating housing 4, an earthing electric contact 3, and two kinds of electric contacts for signals, capable of mutually fitting. Electric contacts are arranged in a row to form female and male contacts with the same shape. The electric contact for signals and the earthing electric contact 3 form microstrip structure by placing an insulator of the insulating housing 4 between them. Two kinds of electric contacts for signals are fitted to a different kind of electric contact of a partner electric contact to obtain good electrical contact and effective impedance matching.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrical connector, and more particularly to an electrical connector for electrically connecting printed circuit boards to each other and an electrical contact used therein.

[0002]

2. Description of the Related Art In recent years, electronic devices have become smaller and smaller, and their operation speeds are increasing. This tendency is remarkable even in the case of computers such as workstations, and the electric connectors used in those electronic devices are also being dealt with. On the other hand, the size (dimension) of a computer-related device is often a problem, and a more compact package that effectively utilizes a narrow space is required. In such a case, it is very effective to form the boards (printed circuit boards) into a stacking structure. That is, the space can be effectively used by stacking the boards on each other, and in some cases, it is possible to add circuits such as a memory as required.

[0003]

By the way, as described above, it is inevitable to cope with high speed even in a board fixed type electrical connector for connecting boards when they are stacked. The problem at this time is the problem of impedance matching.
Impedance matching needs to be realized to ensure the transmission of signals.

The conventional electrical connector for inter-board connection of this type has a complicated shape in order to solve the problem of impedance matching. Therefore, it is expensive and difficult to manufacture, and there are many defects in electrical contact between electrical contacts that transmit signals, and improvements have been desired.

Therefore, an object of the present invention is to provide an electrical connector which has a sufficient impedance matching property corresponding to the speeding up of signal transmission, and has a simple structure and economical effect. Another object of the present invention is to provide a signal electrical contact that provides sufficient impedance matching and has a high electrical contact reliability and reliable signal transmission.

[0006]

According to the present invention, a plate-shaped contact portion and an arm contact portion having elasticity and an arch-shaped curved surface are arranged to face each other with their free ends, and End portions of the plate-shaped contact portion and the arm contact portion opposite to the free ends of the plate-shaped contact portion and the arm contact portion. Is characterized in that a solder tine portion is formed.

Further, according to the present invention, plate-shaped grounding electric contacts having engaging portions are arranged in a row in the insulating housing, and the signal electric contacts having a complementary shape are grounding electric contacts. The rows and columns are arranged in rows so as to form an electrical connector of substantially the same shape as the male and female, and one of the rows of the electrical contacts for signals is arranged at a substantially constant distance from the electrical contacts for grounding with an insulator interposed therebetween. It is characterized by

The electrical connector of the present invention comprises three types of electrical contacts of different shapes and an insulating housing for housing them. Two of the three electrical contacts are for signals and the other one is for ground. Two types of electrical contacts for signals (hereinafter also referred to as electrical contacts) have a pair of contact portions at one end and a pair of tines (solder tines) fixed to the substrate at the opposite ends, and these pairs serve as a bridge ( (Bridge) formed. The contact portions of the two types of signal electrical contacts are formed to be complementary to each other. One of a pair of contact portions of each electric contact is formed in a cantilever shape having a spring property, and the other is formed in a plate shape and is arranged to face each other. That is, at the time of fitting, the cantilever-shaped contact portion (arm contact portion) and the plate-shaped contact portion (plate-shaped contact portion) are in contact with each other to be electrically connected.

The grounding electrical contact has a planar structure in which a cantilever-shaped contact portion and plate-shaped portions are arranged side by side in the lateral direction. The grounding electrical contact engages an identically shaped electrical contact. That is, the cantilever-shaped contact portions are in contact with each other and electrically connected to each other.

These three electrical contacts are arranged in an insulating housing to form a microstrip structure. The electrical contacts for grounding are arranged in a row and
The two types of signal electrical contacts are arranged in each row with the row of grounding electrical contacts interposed therebetween. Further, the plate-shaped contact portions of at least one of the two types of signal electrical contacts are arranged substantially parallel to the row of grounding electrical contacts, and sandwich the insulator to form a strip.

This electrical connector is formed to have a male and female shape. In other words, due to the arrangement of the electrical contacts described above, the electrical contacts for grounding make electrical contact with each other at the center when they are mated, and the electrical connector for each type of signal is connected to the electrical connector for another type of the other electrical connector on both sides sandwiching it. Mates with contacts. Therefore, at the time of fitting, perfect impedance matching is performed and signal reflection and attenuation are prevented.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The electrical contacts and connectors of the present invention will be described in detail below with reference to the accompanying drawings.

The electrical contacts of the present invention are shown in FIGS. The electrical contact 1 shown in FIGS. 1 and 2,
Both 2 have a pair of tine parts (solder tine parts) 14 and 24 on the side fixed to the board, and a pair of contact parts 11, 12; 21, 22 on the mating side with the mating connector. The contact portions of the electric contacts 1 and 2 are plate portions (plate-shaped contact portions) 11 and 21, respectively.
And the elastic arm portions (arm contact portions) 12 and 22 are arranged so as to face each other. Plates 11 and 21 and elastic arms 12 and 22
Are connected by bridge portions 13 and 23, respectively, as shown in FIGS. The bridge portions 13 and 23 are formed by bending the plate portions 11 and 21 and the elastic arm portions 12 and 22 substantially at right angles.

In the electrical contact 1 of FIG. 1, the plate portion 11
A wide portion is formed between the elastic arm portion 12 and the elastic arm portion 12, that is, the bridge portion 13 is formed to be long, and the tip end of the elastic arm portion has an arch-shaped curved surface protruding inward. Further, in the electric contact 2 of FIG. 2, the space between the plate portion 11 and the elastic arm portion 12 is narrowed, that is, the bridge portion 23 is formed short, and the tip of the elastic arm has an arch-shaped curved surface protruding outward. As a result, these electrical contacts 1 and 2 can be complementarily engaged while the plate portions 11 and 21 and the elastic arm portions 22 and 12 are in contact with each other.

Electrical contacts 1, 2 as shown in FIGS.
The ridges 15 and 25 are formed on the tine portions 14 and 24 in proper directions. The tines 14, 24 can be inserted into through holes in the printed circuit board and fixed by soldering.

FIG. 3 shows an electrical contact 3 for grounding. The grounding electrical contact 3 is formed in a plate shape. The contact portion provided at one end includes a plate portion 31 and an arm portion 32 formed by alternately arranging in the lateral direction. The arm portion 32 is formed to have elasticity and a curved surface as shown in FIG. In addition, the contact portion 31,
A solder tine portion 34 is formed at the opposite end of 32.

4 and 5 show an embodiment of the electrical connector of the present invention. The insulating housing 4 has a box-shaped fitting portion 41.
And a ridge fitting portion 42. The electric contact 1 is arranged in the box-shaped fitting portion 41, and the electric contact 2 is arranged in the ridge fitting portion 42. Locking the electrical contacts to the housing is by press fitting. (The locking structure by press fitting is omitted in the drawings.) As shown in FIGS. 4 and 5, the inner wall of the box-shaped fitting portion 41 has a plate portion groove 43 for accommodating the plate portion 11 of the electric contact 1 and an elastic arm. Arm grooves (44) for accommodating the parts (12) and enabling the bending at the time of fitting are formed facing each other. Further, the grounding electrical contacts 3 are arranged in a line on the outer wall of the box-shaped fitting portion 41 on the back side of the plate groove 43. As a result, the plate portion of the electrical contact 1
A microstrip structure is formed in which 12 and the grounding electrical contact 3 are arranged at a substantially constant interval with the insulator 51 sandwiched therebetween. A notch 45 is formed on the top of the outer wall of the rear surface of the arm portion 32 of the grounding electrical contact 3 to allow the arm portion 32 to bend. Further, the protrusion fitting portion 42 is arranged so as to sandwich the grounding electrical contact 3 with respect to the box-shaped fitting portion. Ridge fitting part 42
The outer wall of the arm has an arm groove 46 for accommodating the elastic arm portion 22 of the electric contact 2 on the side facing the electric contact 3 for grounding and allowing the elastic arm portion 22 to bend during fitting, and the plate portion 21 on the opposite side. The plate groove 47 is formed. That is, the electric contacts 2 are arranged so as to sandwich the ridges 48 of the insulating housing 4.

FIG. 6 shows a fitted state of the electric connector of the present invention. The plate parts 11, 21 of the electric contacts 1 and 2 for each signal,
The elastic arms 12 and 22 are in electrical contact with the elastic arms 22 'and 12' and the plate portions 21 'and 11' of the mating electrical contacts, respectively.
Further, the grounding electrical contacts 3 and 3'arranged in the center electrically contact each other through the elastic arm portions 32 and 32 '. As mentioned above, the electrical contacts 3, 3'are the plate parts 12, 1
Since they are placed at approximately the same spacing as 2 ', sufficient impedance matching is achieved in the mated state.

Further, a stack housing 49 for height adjustment is arranged on the bottom surface of the insulating housing as required. This makes it possible to optimize the distance between the substrates.
The stack housing 49 has a terminal passage 50 and an engaging structure with the insulating housing 4. In addition, the stack housing 49 arranges the arrangement of each electric contact and also functions as a flux preventer during soldering. Also, during height adjustment, the electrical contacts are formed by adjusting their longitudinal dimension.

The embodiment of the present invention has been described above.
Besides this, various modifications can be made without changing the gist of the present invention. The configurations or operations of the disclosed embodiments of the present invention are merely illustrative and do not limit the present invention.

[0021]

As described above, the electrical connector of the present invention provides an electrical connection with a relatively simple structure, which is capable of performing sufficient impedance matching corresponding to the speeding up of electronic equipment. In particular, since the electrical connector of the present invention is essentially hermaphroditic, it has a small number of parts and a great economic effect.

Characteristic electrical contacts are used in the electrical connector of the present invention. The electrical contact of the present invention has sufficient impedance matching at the time of mating and provides high contact reliability. In particular, since the contact with the mating contact is made at two points, the contact pressure is well balanced and highly reliable.
Further, since the tab-shaped plate portion and the bellows-type elastic arm portion are connected to each other, it is resistant to twisting.

[Brief description of drawings]

FIG. 1A is a side view and FIG. 1B is a front view showing an example of an electrical contact of the present invention. (The locking structure by press fitting into the housing is omitted. The same applies to the following drawings.)

2 (a) is a side view and FIG. 2 (b) is a front view of an electric contact used in combination with the electric contact of FIG.

FIG. 3A is a front view and FIG. 3B is a side view showing a grounding electric contact used in the electric connector of the present invention.

FIG. 4 is a perspective view showing constituent members of an electric connector according to an embodiment of the present invention. A part of the structure near the center of the electrical connector is omitted.

5 is a cross-sectional view of the electrical connector of FIG.

6 is a cross-sectional view showing a fitted state of the electric connector of FIG.

[Explanation of symbols]

 1, 2 Electrical contact (electrical contact for signal) 3 Electrical contact for grounding 4 Insulating housing 11, 21 Plate-shaped contact part 12, 22 Arm contact part 13, 23 Bridge part 14, 24 Solder tine part 51 Insulator

Claims (2)

[Claims] 1. A plate-shaped contact portion and arm contact portions having elasticity and having an arch-shaped curved surface are arranged to face each other with respective free ends, and the plate-shaped contact portion and the arm contact portion are provided. Formed by being connected to each other by a bridge portion that is bent in a direction substantially perpendicular to the surface, and a solder tine portion is formed at an end opposite to the free end of each of the plate-like contact portion and the arm contact portion. An electrical contact characterized in that 2. A plate-shaped grounding electric contact having an engaging portion is arranged in a line in a row in the insulating housing,
In addition, the signal electric contacts having complementary shapes are arranged in rows with the row of grounding electric contacts sandwiched therebetween to form an electrical connector of substantially the same sex, and one of the signal electric contact rows is an insulator. An electrical connector, wherein the electrical connector is disposed at a substantially constant distance from the electrical contact for grounding with a pinch in between.