JP2005174901A - Lga electric connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an LGA electric connector for electrically connecting an IC module to a circuit board. <P>SOLUTION: The LGA electric connector, for electrically connecting the IC module to the circuit board, is provided with an insulator main body and a plurality of conductive terminals contained in the same. The insulator main body is provided with a conductive zone and a base part consisting of a first mounting face and a second mounting face. The conductive zone has a plurality of terminal containing spaces arrayed in a matrix shape, and the plurality of conductive terminals are contained in the corresponding terminal containing spaces. A first protrusion is designed to be protruded upward from the first mounting face, and a second protrusion protruded downward from the second mounting face. Each protrusion is set in the middle of two adjacent terminal containing spaces, so as to separate them. The protrusions prevent the conductive terminals from excessive deformation, realizing high-frequency and high-speed signal transmission with excellent stability and reliability between electronic equipment. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an LGA electrical connector, and more particularly to an LGA electrical connector for electrically connecting an IC module to a circuit board.

Conventional LGA electrical connectors can be used for high-frequency and high-speed signal transmission between two electronic devices, and are widely used in the electrical field.
As shown in FIG. 1, the LGA electrical connector for electrically connecting the IC module 7 to the circuit board 9 includes an insulating body 6 and conductive terminals 5, and the insulating body 6 includes a body 65 and four side walls 61. The main body 65 and the four side walls 61 form an accommodation space 63 for accommodating the IC module 7. The main body 65 is provided with a conductive section, and a plurality of terminal accommodating spaces 60 arranged in a matrix are arranged in the conductive section. All the C-shaped conductive terminals 5 are designed to bend in the same direction. A contact arm 51 and a contact arm (not shown) extend from the upper and lower ends of the conductive terminal 5 so as to protrude from the upper and lower surfaces. When assembling, the conductive terminal 5 is elastically deformed, the contact arm 51 of the conductive terminal 5 is brought into contact with the conductor of the IC module 7, and the contact arm 52 is brought into contact with the conductor of the circuit board 9. The pressure which electrically connects 9 is required.

  However, since the arrangement density of the conductive terminals of the LGA electrical connector is high, when the IC module 7 and the circuit board 9 are connected, the contact arm and the contact arm of the conductive terminal are deformed by pressure and there is no protective device. Therefore, the contact arm and the contact arm may lose elasticity. As a result, stable contact cannot be realized, and there is a possibility that adjacent terminals contact or short circuit. There is a need to design a new type of electrical connector that improves upon the above mentioned drawbacks.

  The present invention provides an LGA electrical connector for electrically connecting an IC module to a circuit board.

  An LGA electrical connector for electrically connecting an IC module of the present invention to a circuit board includes an insulating body and a plurality of conductive terminals accommodated in the insulating body, and the insulating body is provided with a conductive section. And a base portion comprising a first mounting surface and a second mounting surface. A plurality of terminal accommodating spaces are arranged in a matrix in the conductive section, and the plurality of conductive terminals are accommodated in the corresponding terminal accommodating spaces. The first protrusion is installed so as to protrude upward from the first mounting surface, and the second protrusion is installed so as to protrude downward from the second mounting surface. Each protrusion is provided between the two terminal accommodating spaces, and is disposed with the terminal accommodating space therebetween. The protrusion prevents the conductive terminal from being deformed excessively, and realizes high-frequency and high-speed stable and reliable signal transmission between electronic devices.

  Compared with the prior art, the present invention has the following advantages. By adding a protrusion between the conductive terminals, when the conductive terminal is pushed, the horizontal movement of the free end of the conductive terminal is limited to a certain range, and it is possible to prevent the elastic recovery from being impossible due to excessive pressure.

  As shown in FIGS. 2 to 5, the invention relates to an LGA electrical connector 1 for electrically connecting an IC module 4 to a circuit board 5. The LGA electrical connector 1 includes an insulating body 10 and an insulating body 10. And a plurality of conductive terminals 20 accommodated therein.

  The insulating body 10 has a vertically long plate-like structure and includes a base portion 13 and four side walls 12 extending from the edge of the base portion 13. The upper surface of the base portion 13 is a first mounting surface 130 and the lower surface is a second mounting surface 132. A conductive section is provided in the central portion of the base portion 13, in which a plurality of terminal accommodating spaces 110 for accommodating the conductive terminals 20 are arranged in a matrix, and between two adjacent terminal accommodating spaces 110. The first protrusion 134 and the second protrusion 135 are provided so as to protrude. When viewed as a whole, the terminal receiving space 110 is designed with a protrusion therebetween. The first protrusion 134 protrudes upward in a state higher than the first mounting surface 130, and the second protrusion 135 is installed to protrude downward in a state lower than the second mounting surface 132. The four side walls 12 and the base portion 13 are integrated to form an accommodation space 15 for accommodating the IC module 4. Each adjacent side wall 12 is provided with an elastic arm 120 for pressing the IC module 4.

  The conductive terminal 20 is designed in a C shape, and the curve is bent in the same way. A contact arm 22 and a contact arm 24 extend from both upper and lower ends of the conductive terminal 20, and a contact portion 222 and a contact portion 242 extend from the free ends of the contact arm 22 and the contact arm 24. Yes. The conductive terminal 20 is accommodated in the corresponding terminal accommodating space 110, and the contact portion 222 protrudes from the first mounting surface 130 of the base portion 13 and is higher than the top surface of the first protrusion 134. The corresponding contact body 412 is connected. The contact portion 242 protrudes from the second mounting surface 132 of the base portion 13 and is connected to a corresponding contact piece 512 on the circuit board 5 so as to be lower than the second protrusion 135.

  When the IC module 4 is attached to the electrical connector 1 from above, the sides of the IC module 4 press both elastic arms 120 to elastically deform and move to the side wall 12 side. It is accommodated in the accommodating space 15. At the same time, the contact portion 222 of the conductive terminal 20 contacts the corresponding contact body 412 on the IC module 4, and the contact portion 242 contacts the contact piece 512 on the circuit board 5. The electrical connection with 5 is realized. The elastic recovery force generated by the elastic deformation presses the side of the IC module 4 and holds the IC module 4 in the accommodation space 15 of the electrical connector 1.

  When the IC module 4 is mounted from above, the conductor 412 of the IC module 4 pushes the conductive terminal 20, elastically deforms the contact arm 22 and the contact arm 24 of the conductive terminal 20, and the contact portion 222 and the contact portion 242. Is horizontally moved to the adjacent conductive terminal 20 side. In this case, since the protrusion is installed between the two terminal accommodating spaces 110, when the contact portion 222 and the contact portion 242 reach a certain position, the free ends of the contact arm 22 and the contact arm 24 are respectively the first ends. It is possible to prevent the elastic recovery of the contact arm 22 and the contact arm 24 due to excessive pressure when the bumps collide with the side surfaces of the first protrusion 134 and the second protrusion 135. Since the two adjacent conductive terminals 20 separate the protrusions, excessive deformation of the contact arm 22 and the contact arm 24 in the horizontal direction and contact / short path between the adjacent conductive terminals 20 are prevented.

  6 and 7 show a second embodiment of the present invention. In the second embodiment, the contact arm 22 'and the contact arm 24' of the conductive terminal 20 'are designed to be shorter, and the first protrusion 134' and the second protrusion 135 'are designed to be longer. The contact portion 222 ′ of the contact arm 22 ′ is provided to protrude from the first mounting surface 130 ′ and to be higher than the first protrusion 134 ′ in order to contact the corresponding conductor 412 ′ on the IC module 4 ′. ing. The contact portion 242 ′ of the contact arm 24 ′ protrudes from the second mounting surface 132 ′ and extends below the second protrusion 135 ′ in order to contact the contact piece 512 on the circuit board 5 ′. Is provided. When the IC module 4 presses the conductive terminal 20 ′, the conductive terminal 20 ′ is elastically deformed, and the contact portion 222 ′ and the contact portion 242 ′ approach each other. At the same time, the ends of the contact arm 22 ′ and the contact arm 24 ′ are accommodated in the terminal accommodating space. When the conductive terminal 20 ′ is pressed to a certain position, the first protrusion 134 ′ and the second protrusion 135 ′ come into contact with the IC module 4 ′ and the circuit board 5 ′, respectively, and the conductive terminal 20 ′ is elastically damaged by excessive pressure. Can be prevented.

  In general, both the structure and function of the present invention, including the numerous features and advantages of the present invention, are listed in the foregoing description. Further, the above description is intended to be within the scope of the present invention, such as modification or change of details that can be made based on the present invention.

It is a three-dimensional view showing a state before assembling a conventional LGA electrical connector and an IC module. It is a three-dimensional view showing a state before assembling the LGA electrical connector and the IC module of the present invention. FIG. 3 is a cross-sectional view of the LGA electrical connector shown in FIG. 2 along line III-III. It is a three-dimensional view showing a state after assembling the LGA electrical connector and the IC module of the present invention. FIG. 5 is a cross-sectional view of the LGA electrical connector of FIG. 4 along line VV. It is a three-dimensional view showing a state before assembling the LGA electrical connector and the IC module of the second embodiment of the present invention. It is a three-dimensional view showing a state after assembling the LGA electrical connector and the IC module of the second embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 LGA electrical connector 4 IC module 5, 5 'Circuit board 10 Insulation body 12 Side wall 13 Base part 15 Storage space 20' Conductive terminal 22, 22 'Contact arm 24, 24' Contact arm 110 Terminal storage space 120 Elastic arm 130, 130 'first mounting surface 132, 132' second mounting surface 134, 134 'first projection 135, 135' second projection 222, 222 'contact portion 242, 242' contact portion 412, 412 'conductor 512, 512 'Contact piece

Claims (11)

In an LGA electrical connector for electrically connecting an IC module to a circuit board,
An insulating body including a first mounting surface facing the IC module, a second mounting surface facing the circuit board, and a terminal housing space arranged in a plurality of matrices, wherein the conductive section is installed and facing the IC module;
A plurality of conductive terminals housed in the terminal housing space of the insulating body,
A first protrusion protruding upward from the first mounting surface and a second protrusion protruding downward from the second mounting surface are provided, each protrusion being provided in the middle of both terminal receiving spaces, The LGA electrical connector, wherein when pressed, the first protrusion and the second protrusion are in proper contact with the IC module and the circuit board, respectively, to prevent elastic breakage of the conductive terminal due to excessive pressing force.   The contact arm and the contact arm are extended from both upper and lower ends of the conductive terminal, and the contact arm and the contact arm are provided with a contact portion and a contact portion. LGA electrical connector.   The contact portion of the conductive terminal protrudes upward so as to be higher than the top surface of the first protrusion, and the contact portion protrudes downwardly lower than the second protrusion. 2. The LGA electrical connector according to 2.   4. The LGA electrical connector according to claim 3, wherein the conductive terminals are designed to be bent in a C-shape and are designed to have the same curve bending method.   The LGA electrical connector according to claim 1, wherein the conductive terminal is not in contact with the protrusion in a pressed state.   6. The LGA electrical connector according to claim 5, wherein a side wall extends upward from the periphery of the conductive section, and an elastic arm is provided on each adjacent side wall. In an LGA electrical connector for electrically connecting an IC module to a circuit board,
An insulating body having a base portion where a conductive section is installed, and a plurality of terminal accommodating spaces arranged in a matrix in the conductive section;
A contact arm having a contact portion and a contact portion from both the upper and lower ends, and a contact arm, and a plurality of conductive terminals housed in a terminal housing space of the insulating body;
Since the protrusion is installed in the middle of both terminal receiving spaces, when the conductive terminal is pressed, the movement of the contact arm and the contact arm is restricted by the protrusion, and excessive deformation of the conductive terminal is prevented. Characteristic LGA electrical connector.   The LGA electrical connector according to claim 7, wherein the conductive terminal is provided so as to contact a side surface of the protrusion.   9. The LGA electrical connector according to claim 8, wherein the conductive terminals are designed in a C shape and the curve is designed to be bent in the same way.   The base portion is provided with a first mounting surface and a second mounting surface, and the first protrusion protrudes upward from the first mounting surface, and the second protrusion protrudes downward from the second mounting surface. The LGA electrical connector according to claim 7.   11. The LGA electrical connector according to claim 10, wherein when the conductive terminal is pressed, the contact arm contacts the first protrusion and the contact arm contacts the second protrusion.

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