CN102208720B - Electric connector - Google Patents

Abstract

The invention discloses an electrical connector, which includes an insulating body provided with a terminal hole and a plurality of conductive terminals accommodated in the terminal hole. The terminal holes of the insulating body are arranged in an array. The conductive terminal includes an upper contact portion and a lower welding portion. The conductive terminals are arranged in the insulating body in a first arrangement and a second arrangement. In the first arrangement, the distance between adjacent welding parts of the same row of conductive terminals is greater than the distance between adjacent contact parts, and the distance between the same row of conductive terminals The distance between adjacent welding parts is the same as the distance between adjacent contact parts; in the second arrangement, the distance between adjacent welding parts of adjacent conductive terminals in the row and column directions is greater than the distance between adjacent contact parts . The electric connector of the present invention uses conductive terminals with the same structure to realize high-density arrangement of the terminals, which can save costs and facilitate the installation of the electric connector on the circuit board.

Description

electrical connector

【Technical field】

The invention relates to an electrical connector, in particular to a plane grid array electrical connector for electrically connecting a chip module to a circuit board.

【technical background】

Electrical connectors can be divided into Land Grid Array electrical connectors, Ball Grid Array electrical connectors and Pin Grid Array (Pin Grid Array) electrical connectors according to the contact mode between conductive terminals and chip modules or circuit boards. Grid Array) electrical connector.

U.S. Patent No. 7,074,048 published on July 11, 2006 discloses a Land Grid Array (LGA) and Ball Grid Array (BGA) type electrical connector for contacting the chip module and the circuit board respectively. The electrical connector includes an insulating body and a plurality of conductive terminals accommodated in the insulating body. The conductive terminal includes a base held in the terminal receiving groove of the insulating body, elastic arms and horizontal welding parts respectively extending from the base to both ends, wherein the end of the elastic part is provided with a contact part for contacting the conductive sheet of the chip module, Solder balls are arranged under the soldering portion, and the electrical connector is welded to the conductive sheet of the circuit board through the solder balls. When the electrical connector is connected to the chip module, the elastic arm of the conductive terminal is elastically deformed by pressing an external force, so that the contact part of the conductive terminal elastically abuts against the conductive sheet on the bottom surface of the chip module, thereby achieving electrical connection between the chip module and the circuit board. sex lead. In this type of electrical connector, the distance between the contact parts of adjacent conductive terminals is equal to the distance between the corresponding welding parts.

With the miniaturization and high-speed development of electrical equipment, the density between the conductive terminals of the LGA electrical connector is also increasing. However, at present, the technical development of chip modules and circuit boards is not in line with each other. New process capabilities can already produce high-density chip modules with smaller spacing between conductive sheets. If you want to manufacture circuit boards with the same density as the above-mentioned chip modules, the cost is relatively high. High and low yield. The above-mentioned existing electrical connectors can only connect chip modules and circuit boards with the same spacing of conductive sheets, so they cannot be used to connect chip modules with small-pitch conductive sheets to existing circuit boards, thereby limiting the small-pitch high-density chip module. development of.

In view of this, it is necessary to provide an improved electrical connector to overcome the above-mentioned shortcomings of the electrical connector.

【Content of invention】

The technical problem solved by the present invention is to provide an electrical connector, the density of the upper contact portion of the electrical connector is different from the density of the lower welding portion.

To solve the aforementioned technical problems, the present invention provides an electrical connector, which includes an insulating body and a plurality of conductive terminals. The insulating body is provided with terminal holes arranged in an array. The conductive terminal is accommodated in the terminal hole, and the conductive terminal includes an upper contact portion and a lower welding portion. Wherein, the extending directions of rows and columns are respectively defined as X direction and Y direction. The conductive terminals are arranged in the insulating body in the first arrangement and the second arrangement. In the first arrangement, the distance between the welding parts of the adjacent conductive terminals in the X direction is greater than the distance between the contact parts, and the adjacent contact parts in the Y direction The pitch of the soldering portions of the conductive terminals is the same as the pitch of the contact portions; in the second arrangement, the pitches of the soldering portions of adjacent conductive terminals in the X and Y directions are greater than the pitch of the contact portions.

Compared with the prior art, in the case of the same number of contact parts and welding parts of the conductive terminal, the area occupied by the contact part of the conductive terminal of the present invention is smaller than that of the welding part in the extending direction of the row and column where the conductive terminal is located. Therefore, the density of the contact portion of the conductive terminal is greater than the density of the soldering portion, so as to adapt to the development of the existing high-density chip module.

【Description of drawings】

FIG. 1 is a three-dimensional assembled view of a part of the electrical connector of the present invention.

Fig. 2 is a partial sectional view of the electrical connector of the present invention.

FIG. 3 is a schematic diagram of relative positions of contact portions and soldering portions of conductive terminals arranged in a first arrangement of the electrical connector of the present invention.

FIG. 4 is a three-dimensional assembled view of another part of the electrical connector of the present invention.

5 is a bottom view of the upper body of the electrical connector of the present invention, wherein the terminal holes are arranged in a second arrangement.

FIG. 6 is a schematic diagram of the relative positions of the contact portions and welding portions of the conductive terminals arranged in the second arrangement of the electrical connector of the present invention.

FIG. 7 is a schematic diagram of the arrangement of the contact portion and the welding portion of the conductive terminal of the electrical connector of the present invention.

FIG. 8 is a schematic diagram of another arrangement of the contact portion and the welding portion of the conductive terminal of the electrical connector of the present invention.

FIG. 9 is a schematic diagram of another alternative method of the contact portion and the welding portion of the conductive terminal of the electrical connector of the present invention.

【Detailed ways】

Referring to FIG. 1 , the electrical connector includes an insulating body 1 and a plurality of conductive terminals 2 accommodated in the insulating body 1 .

2 and 7, the insulating body 1 includes an upper body 10 and a lower body 11 stacked up and down. The upper and lower bodies 10, 11 are respectively provided with an upper terminal hole 100 and a lower terminal hole 110. The upper and lower terminals The holes 100 and 110 are correspondingly connected to form a terminal hole for accommodating the conductive terminal 2 . The insulating body 1 is roughly square and divided into several regions, including a roughly square middle region 13, a second region 14 located at four corners and a first region 15 between adjacent second regions 14, the first region 15 are located on the four sides of the middle area 13. The conductive terminals 2 are arranged in an array in the insulating body 1 , including several rows and several columns, and the arrangement of the conductive terminals 2 in the second region 14 is different from that in the first region 15 .

Continue referring to FIG. 2 , the conductive terminals 2 are assembled in the upper and lower terminal holes 100 , 110 . Each conductive terminal 2 has a longer abutment arm 20 and a shorter elastic support arm 21 bent upward from the bottom of the abutment arm 20 . A welding portion 22 is formed at the bend of the abutting arm 20 and the supporting arm 21 , and a contact portion 23 is formed by bending the free end above the abutting arm 20 . The contact portion 23 and the welding portion 22 pass through the upper body 10 and the lower body 11 respectively and are respectively used for electrically connecting with a chip module (not shown) and a circuit board (not shown).

The conductive terminals 2 located in the first region 15 are arranged in a first arrangement. Referring to FIGS. 1 and 2 , each upper terminal hole 100 has a vertical wall 101 and an abutting wall 102 opposite to the vertical wall 101 . In the direction of the same row, the inclination angles of the abutment walls 102 gradually increase from left to right, wherein the angle between the first abutment wall 102 on the left and the vertical direction is zero degrees, and the rightmost abutment wall 102 The angle between 102 and the vertical direction is the largest. The structure of the lower body 11 is similar to that of the upper body 10. Each lower terminal hole 110 has a vertical wall 111 and an abutment wall 112. The abutment wall 112 is on the same plane as the abutment wall 102 in the corresponding upper terminal hole 100. Inwardly inclined, the vertical wall 111 and the corresponding vertical wall 101 in the upper terminal hole 100 are sequentially staggered from left to right, and the distance from the first alignment on the left to the staggering distance gradually increases.

The conductive terminal 2 is assembled in the upper and lower terminal holes 100, 110, and the pitch d of the contact portion 23 of the conductive terminal 2 formed by the aforementioned terminal hole structure is smaller than the distance D between the soldering portions 22. Therefore, the small pitch of the contact portion 23, The high-density arrangement is suitable for chip modules (not shown) of specific specifications, and at the same time, the larger distance D between the soldering portions 22 facilitates assembly of the electrical connector on a circuit board (not shown). Refer to the third figure, which is a schematic diagram of the distribution of the contact portion 23 and the welding portion 22 of the conductive terminals 2 arranged in the first arrangement, wherein the larger circle C represents the position of the contact portion 23, and the smaller circle S represents the welding The position of the part 22, as shown in this figure, the arrangement area of the welding part 22 of the conductive terminal 2 is larger than the arrangement area of the contact part 23, and the distance between the welding parts 22 of the adjacent conductive terminals 2 in the same row is greater than the distance between the contact parts 23 , the pitch of the soldering portion 22 of the same row of conductive terminals 2 is the same as the pitch of the contact portion 23, so the first arrangement is based on a row of conductive terminals 2 or terminal holes as the original reference, and the soldering portion 22 is along the X direction (the direction where the row is located) ) expands, the spacing between adjacent welding portions 22 in the X direction is greater than the spacing between adjacent contact portions 23, and the spacing between welding portions 22 and contact portions 23 in the Y direction (column direction) is equal, so the first arrangement is also called one-dimensional expansion.

The conductive terminals 2 located in the second region 14 are arranged in a second arrangement. The terminal holes 100 , 110 and the conductive terminals 2 in the second area 14 have the same structure as the terminal holes 100 , 110 and the conductive terminals 2 in the first area 15 , the difference is the arrangement of the conductive terminals 2 . Referring to Figure 4 and Figure 5, in the second arrangement, with one conductive terminal 2 as the original position, first expand into a row of conductive terminals 2 in the X direction, and then use the row of conductive terminals 2 as the original position to expand in the Y direction The two-way expansion of the welding portion 22 in the X direction and the Y direction is realized through different deflection angles of the conductive terminals 2 . Focus on Fig. 6, which is a schematic diagram of the position distribution of the contact portion 23 and the welding portion 22 of the conductive terminal 2 in the second arrangement mode, and the arrangement area of the welding portion 22 of the conductive terminal 2 is larger than the arrangement area of the contact portion 23 , wherein the distance between the welding parts 22 of the same row of conductive terminals 2 is greater than the distance between the contact parts 23, and the distance between the welding parts 22 of the same row of conductive terminals 2 is also greater than the distance between the contact parts 23, so the second arrangement is the closest to the middle A certain conductive terminal 2 in the area 13 is at the original position, and the welding portion 22 first expands to the X direction and then expands to the Y direction, forming that the distance between adjacent welding portions 22 in both the X direction and the Y direction is greater than the distance between adjacent contact portions 23 , so the second arrangement is also called two-dimensional expansion.

Referring to Fig. 3 and Fig. 6, the extended distance of the outer conductive terminal 2 is longer, so no matter one-dimensional expansion or two-dimensional expansion, the maximum length of its outward expansion will be limited by the manufacturing capacity of the electrical connector, so The present invention combines one-dimensional expansion and two-dimensional expansion. Referring to FIG. 7, the conductive terminals 2 in the second area 14 are expanded in a two-dimensional manner, and the conductive terminals 2 in the first area 15 are expanded in a one-dimensional manner. In this way, different distances between the contact portion 23 and the welding portion 22 of the conductive terminal 2 can be realized and the number of the conductive terminals 2 can be increased. In order to increase the utilization rate of the central conductive sheet of the chip module (not shown), as shown in FIG. 8 and FIG. Set of conductive terminals 2 arranged in a one-dimensional manner. Of course, the arrangement of the conductive terminals 2 of the present invention is not limited thereto, and the conductive terminals 2 of the present invention can also be embedded in the insulating body 1 by insert-mold.

The above are only preferred embodiments of the present invention, and any improvement and transformation made on the basis of this embodiment should not deviate from the technical solution of the present invention.

Claims (7)

1. An electrical connector, comprising: an insulating body and a plurality of conductive terminals, the insulating body is provided with terminal holes arranged in an array, the conductive terminals are accommodated in the terminal holes, the conductive terminals include an upper contact portion and The welding part of the lower part is defined as the X direction and the Y direction by the extension direction of the row and the column respectively, and it is characterized in that: the conductive terminals are arranged in the insulating body in the first arrangement and the second arrangement, and in the first arrangement , the distance between the welding parts of adjacent conductive terminals in the X direction is greater than the distance between the contact parts, and the distance between the welding parts of adjacent conductive terminals in the Y direction is the same as the distance between the contact parts; in the second arrangement, X and Y The distances between the welding parts of the adjacent conductive terminals in the direction are greater than the distances between the contact parts. 2. The electrical connector according to claim 1, wherein the insulating body is defined as several areas, including a rectangular middle area, a first area located at four corners and an adjacent first area and a second area between them, the second area is located on four sides of the middle area, the conductive terminals in the first area are arranged in a first arrangement, and the conductive terminals in the second area are arranged in a second arrangement. 3. The electrical connector according to claim 2, wherein the conductive terminals disposed in the middle area are arranged in a first arrangement or in a second arrangement. 4. The electrical connector according to claim 1, wherein the insulating body comprises an upper body and a lower body, and the upper and lower bodies are respectively provided with an upper terminal hole and a lower terminal hole, and the terminal hole consists of an upper body and a lower body. The lower terminal holes are formed corresponding to the communication. 5. The electrical connector according to claim 4, wherein each of the upper and lower terminal holes is respectively provided with a vertical wall and an abutting wall opposite to the vertical wall, wherein in the X direction, the The angle of inclination against the wall gradually increases from zero degree, and the vertical wall of the lower terminal hole and the vertical wall of the upper terminal hole gradually increase the stagger distance from alignment to the vertical wall of the upper terminal hole. 6. The electrical connector according to claim 1, characterized in that: in the second arrangement mode, a conductive terminal is used as the original position, first expanded into a row of conductive terminals in the X direction, and then the row of conductive terminals is used as the original position. The position expands to the Y direction, and the two-way expansion of the welding part to the X direction and the Y direction is realized through different deflection angles of the conductive terminals. 7. The electrical connector according to claim 1, wherein the conductive terminal has a longer abutment arm and a shorter elastic support arm bent upward from the bottom of the abutment arm, the The welding part is formed at the bend of the abutting arm and the supporting arm, and the free end of the contact part above the abutting arm is bent.

Images