JP3155159U - Electrical connector - Google Patents

Abstract

An electrical connector capable of maintaining high-speed transmission characteristics by equalizing the transmission rate of signal contacts. An insulating housing including a base portion and a supporting tongue extending forward from the base portion, and a plurality of contacts attached to the insulating housing. The plurality of contacts include at least a pair of signal contacts S and two ground contacts G. The signal contacts S and the ground contacts G are connected to a contact portion accommodated in the support tongue 12 and a circuit board. And a connecting portion that connects the contact portion and the terminal portion. Further, the contact portions of the ground contacts G are arranged in the upper row, the contact portions of the signal contacts S are arranged in the lower row, and each of the contact portions of the pair of signal contacts and the two adjacent to the signal contacts S are arranged. The contact portion of the ground contact G forms an isosceles trapezoid, and the bottom of the isosceles trapezoid connects the contact portions of the two ground contacts G. [Selection] Figure 3

Description

  The present invention relates to an electrical connector, and more particularly to an electrical connector for high-speed differential signal transmission that is mounted on a circuit board.

  In the prior art, as shown in Patent Document 1, an electrical connector is composed of a contact, an insulator, and a shell surrounding the whole, and the contact includes a plurality of signal contacts S, a plurality of ground contacts G, A pair of signal contacts S includes a plurality of general contacts D, and a pair of signal contacts S includes a + signal contact S and a − signal contact S. In the embodiment, the three types of contacts are arranged in the order of S, S, S, S, D, D from the right side in the upper row, and G, G, G, from the right side in the middle row. Arranged in the order of G, D, D, and in the lower row, they are arranged in the order of S, S, S, S, D from the right side. S adjacent in the upper row, S and G in the middle row, and S in the middle row and S, S adjacent in the lower row are located at the vertices of the inverted isosceles trapezoid. By arranging the + signal contact S, the − signal contact S, and the ground contact G at the apex of the inverted isosceles trapezoid, the high-speed transmission characteristics are maintained.

Japanese Patent No. 3564555

  However, in the contacts of the conventional electrical connector, the lengths of the signal contacts S arranged in the upper row, the middle row, and the lower row are different, so that the impedance of each of the pair of signal contacts S is different. The transmission rate of each signal contact S is not uniform. Therefore, in order to equalize the transmission rate of the signal contact, it is necessary to arrange an adjustment member for equalizing the transmission rate of the signal contact on the circuit board on which the electrical connector is mounted. There was a concern that the arrangement of the substrates would be complicated. Therefore, it is necessary to develop a new electrical connector.

  An object of the present invention is to provide an electrical connector in which the transmission rate of signal contacts is uniform and high-speed transmission characteristics can be maintained.

  In order to solve the above problems, the present invention includes an insulating housing including a base portion, a support tongue extending forward from the base portion, and a plurality of contacts attached to the insulating housing. In the electrical connector, the plurality of contacts include at least one pair of signal contacts and two ground contacts, and the signal contacts and the ground contacts include a contact portion accommodated in the support tongue and a circuit board. A terminal portion to be connected; and a connecting portion that connects the contact portion and the terminal portion. The contact portion of the ground contact is disposed in an upper row, and the contact portion of the signal contact is disposed in a lower row. Each of the contact portions of the pair of signal contacts and the contact portions of the two ground contacts adjacent to the signal contacts constitute an inverted isosceles trapezoid. , Wherein the isosceles trapezoid base is connected to the contact portion of the two ground contact.

  In the electrical connector of the present invention, since the contact portions of the signal contacts are arranged in a line, the lengths of the signal contacts are equal, the impedances of the signal contacts are equal, and therefore the transmission rates of the signal contacts S are equalized. Simplifies circuit board design. In addition, since each pair of signal contacts is arranged between the ground contacts, impedance matching of the signal contacts can be easily maintained, and high-speed transmission characteristics can be maintained.

1 is an assembled perspective view of an electrical connector according to the present invention. It is the assembly perspective view which looked at the electrical connector shown in FIG. 1 from another angle. It is a front view of the electrical connector shown in FIG. It is a disassembled perspective view of the electrical connector which concerns on this invention. It is the disassembled perspective view which looked at the electrical connector shown in FIG. 4 from another angle. It is a top view of the contact of the electrical connector which concerns on this invention. It is sectional drawing which follows the AA line of the electrical connector shown in FIG.

  Hereinafter, a preferred embodiment of the electrical connector 100 of the present invention will be described with reference to FIGS. The electrical connector 100 of the present invention is mounted on a circuit board (not shown) and can be fitted to a mating connector, and substantially surrounds the insulating housing 1, the plurality of contacts 2 attached to the insulating housing 1, and the insulating housing 1. And an outer shield 3 to be included.

  The insulating housing 1 includes a base portion 11 and support tongues 12 extending forward from the top of the base portion 11, and the base portion 11 includes a rear wall 112 and both side walls connected to the rear wall 112. 111. At the corners in the vertical direction connecting the side walls 111 and the rear wall 112, contact protrusions 1121 are formed so as to protrude to the outside. Movement is restricted.

  A plurality of first receiving grooves 121 penetrating the insulating housing 1 along the front-rear direction are provided in parallel on the upper wall of the support tongue 12, and the plurality of first receiving grooves 121 have a circular cross section. Presents. A plurality of second receiving grooves 122 that pass through the insulating housing 1 along the front-rear direction and open to communicate with the outside are provided in parallel on the lower wall of the support tongue 12. A plurality of holding grooves 123 communicating with the first receiving groove 121 in the front-rear direction of the first receiving groove 121 are formed in the middle portion of the support tongue 12, and in order to increase the strength of the support tongue 12, the support tongue 12 The upper wall is provided with a plurality of convex ribs 124 extending in the front-rear direction, and the first receiving groove 121 passes through the convex ribs 124. When the electrical connector 100 is mounted on the circuit board, when viewed from the front, the first receiving grooves 121 and the holding grooves 123 are arranged in a row in the upper stage, and the rows of the second receiving grooves 122 are arranged in a row in the lower stage. Is done.

  A reinforcing plate 13 extending forward from the bottom of the base portion 11 is provided, and the reinforcing plate 13 and the support tongue 12 are arranged in parallel. Convex bars 131 extending along the insertion direction of the mating connector are formed on both sides of the bottom surface of the reinforcing plate 13 facing the circuit board. When the electrical connector 100 is mounted on the circuit board, the convex bars 131 are connected to the circuit board. By contacting the substrate, the area of the insulating housing 1 that contacts the circuit board is reduced, and manufacturing errors of the insulating housing 1 can be reduced. In addition, since the plurality of through grooves 114 are formed in the rear wall 112 of the base portion 11, the weight of the electrical connector 100 can be reduced.

  The plurality of contacts 2 are made of a conductive metal plate and include five ground contacts G in the upper row and four pairs of signal contacts S in the lower row, and the pair of signal contacts S is + It consists of signal contacts and -signal contacts. The ground contact G and the signal contact S connect the contact portion 21 for fitting with the mating contact of the mating connector, the terminal portion 23 connected to the circuit board, and the contact portion 21 and the terminal portion 23. Connecting portion 22 for the purpose.

  The ground contact G is accommodated such that the contact portion 21 protrudes from the first accommodation groove 121, and the connecting portion 22 is held in the holding groove 123. The signal contact S is accommodated in the second accommodation groove 122 such that the contact portion 21 protrudes from the lower wall of the support tongue 12.

  When the electrical connector 100 is mounted on the circuit board as viewed from the front of the insulating housing 1, the contact portions 21 of the five ground contacts G are held in the first receiving groove 121 and the holding groove 123 as upper rows, The contact portions 21 of the four pairs of signal contacts S are received in the second receiving groove 122 as a lower row. That is, the contact portions 21 of the five ground contacts G and the contact portions 21 of the four pairs of signal contacts S are respectively arranged in the upper and lower rows of the support tongue 12. FIG. 6 is a diagram in which the plurality of contacts 2 mounted on the insulating housing 1 are projected from the circuit board, and the insulating housing 1 is omitted. When projected from the circuit board, the four pairs of signal contacts S are arranged between the five ground contacts G.

  FIG. 3 is a front view of the electrical connector 100. When the plurality of contacts 2 are mounted on the insulating housing 1 as viewed from FIG. 3, each of the contact portions 21 of the pair of signal contacts S in the lower row and the upper row are shown. The contact portions 21 of the two ground contacts G adjacent in the row are arranged in a staggered manner at the vertices of the isosceles trapezoid, and the bottom of the isosceles trapezoid is the contact portion of the two ground contacts G Thus, impedance matching can be easily maintained and high-speed transmission characteristics can be maintained.

  The four pairs of signal contacts S are arranged in a row in the second receiving groove 122, the lengths of the four pairs of signal contacts S are equal, and the impedance of each of the pair of signal contacts S is equal. The transmission rate is uniform, and the circuit board design is simplified.

  The connecting portions 22 of the ground contact G and the signal contact S, which are portions attached to the rear wall 112 of the insulating housing 1, are arranged in a row, and on both sides of each of the connecting portions 22 of the pair of signal contacts S, Since the connecting portion 22 of the ground contact G is arranged, each of the pair of adjacent signal contacts S can easily maintain impedance matching. By the through groove 114 of the insulating housing 1, the contact area between the connecting portion 22 of the contact 2 and the insulating housing 1 is reduced, the impedance of the contact 2 is reduced, and a high transmission rate can be maintained.

  Since the terminal portions 23 of the contacts 2 are arranged in a row and are located in the same plane as the protrusions 131 of the reinforcing plate 13 of the insulating housing 1, the flatness of the terminal portions 23 can be easily maintained, and the electrical connector 100 can be assembled. Is advantageous. In the present embodiment, the contact 2 is a surface mount type. Of course, in other embodiments, the contact can be a through-hole type.

  The outer shield 3 substantially surrounds the insulating housing 1 and includes a top plate 31, a bottom plate 32, side plates 33 connecting the top plate 31 and the bottom plate 32, and a rear cover 34.

  The top plate 31, bottom plate 32, and both side plates 33 are punched out with the same metal plate to form an accommodation space 35 having an insertion port (no reference symbol) for accommodating the mating connector. Elastic pieces 36 that are pressed by the mating connector extend so as to extend toward the accommodation space 35 of the bottom plate 32 and the side plates 33. The side plates 33 have a bent portion 331 that bends in the direction from the tip to the outside, a flat plate portion 332 that extends backward from the bent portion 331, and a first holding leg 333 that extends downward from the flat plate portion 332. And the flat plate portion 332 is provided in parallel to the both side plates 33, so that the first holding legs 333 are also arranged to be parallel to the both side plates 33. Of course, in other embodiments, the first holding legs 333 are provided. Can be formed to extend immediately downward from the side plate 33.

  A pair of engagement holes 311 are formed in the top plate 31 of the outer shield 3, a protruding portion 334 is formed at the rear end of both side plates 33, and a metal plate joint 321 is formed on the bottom plate 32. Is done. The portions where the side plates 33, the top plate 31 and the bottom plate 32 are connected to each other abut against the abutment convex portion 1121 of the insulating housing 1 to restrict the rearward movement of the outer shield 3, whereby the outer shield 3 is insulated. Since the acting force acting on the outer shield 3 is equalized when assembled to the housing 1, it is possible to prevent the seam 321 formed on the bottom plate 32 from being torn.

  The rear cover 34 is disposed so as to be separated into the top plate 31, the bottom plate 32, and both side plates 33, and is made of a metal plate different from the external shield, and includes a main body 341 that covers the insulating housing 1, A holding piece 342 extending forward from the top edge, an engagement piece 343 extending forward from both side edges of the main body 341, and a second holding leg extending downward from both ends of the bottom edge of the main body 341 344. The holding piece 342 is accommodated in the holding groove 1110 of the insulating housing 1 and abuts against a convex portion 117 (not shown) provided in the holding groove 1110 to restrict the movement of the rear cover 34 in the left-right direction. An engaging portion 3421 for engaging with the engaging hole 311 of the top plate 31 is formed in the holding piece 342, and the hole 3431 for engaging with the protruding portion 334 of the both side plates 33 is formed in the engaging piece 343. Formed, and these restrict the rearward movement of the rear cover 34.

  The second holding leg 344 is formed so as to immediately extend from the main body 341 of the rear cover 34 and is located in the same plane as the main body 341, and the first holding leg 333, the second holding leg 344, Are spaced apart in the front-rear direction and extend downward. Thus, when the electrical connector 100 is mounted on the circuit board, the movement of the electrical connector 100 in the left-right direction and the front-rear direction is limited.

  When assembling, the contact 2 is attached to the insulating housing 1 later, the rear cover 34 of the outer shield 3 covers the rear wall 112 of the insulating housing 1 later, and the outer shield 3 is assembled to the insulating housing 1 from the front. The rear cover 34 is engaged. When assembled, the reinforcing plate 13 of the insulating housing 1 is positioned at the bottom of the bottom plate 32 of the outer shield 3, and the strength of the outer shield 3 can be increased.

  The electrical connector 100 of the present invention can stably hold the electrical connector 100 on the circuit board by arranging the first holding leg 333 and the second holding leg 344 so as to be spaced apart and extend downward. Abutting protrusions 1121 are formed at the upper and lower corners connected to the rear walls 112 of the both side walls 111 of the insulating housing 1, and the abutting force acting on the outer shield 3 is equalized when the outer shield 3 is assembled to the insulating housing 1. As a result, the seam 321 formed on the bottom plate 32 can be prevented from tearing, and damage to the outer shield 3 can be prevented. In addition, since the support tongue 12 is formed with the receiving groove 121 only in the lower wall, the strength of the support tongue 12 can be ensured, and the thickness of the support tongue 12 can be reduced. This is advantageous for downsizing.

  Although the present invention has been described in detail with reference to the best embodiment, the embodiment is merely illustrative and is not limited thereto. Further, the above description is intended to be within the scope of the claims of the present invention, such as modification or change of details that can be made based on the present invention.

DESCRIPTION OF SYMBOLS 100 Electrical connector 1 Insulation housing 11 Base part 111 Both-side wall 1110 Holding groove 112 Rear wall 1121 Abutting convex part 114 Through groove 117 Convex part 12 Supporting tongue part 121 First accommodation groove 122 Second accommodation groove 123 Holding groove 124 Convex shape Rib 13 Reinforcement plate 131 Convex 2 Contact 21 Contact portion 22 Connection portion 23 Terminal portion G Ground contact S Signal contact 3 Outer shield 31 Top plate 311 Engagement hole 32 Bottom plate 321 Seam 33 Both side plates 331 Bent portion 332 Flat plate portion 333 First One holding leg 334 Protruding part 34 Rear cover 341 Main body part 342 Holding piece 3421 Engaging part 343 Engaging piece 3431 Hole 344 Second holding leg 35 Housing space 36 Elastic piece

Claims (6)

An insulating housing including a base portion and a support tongue extending forwardly from the base portion;
A plurality of contacts mounted on the insulating housing;
In electrical connectors including
The plurality of contacts include at least a pair of signal contacts and two ground contacts;
Each of the signal contact and the ground contact includes a contact portion accommodated in the support tongue, a terminal portion connected to a circuit board, and a connecting portion connecting the contact portion and the terminal portion. ,
The contact portion of the ground contact is disposed in the upper row of the support tongue, and the contact portion of the signal contact is disposed in the lower row of the support tongue.
The electrical connector characterized in that the positional relationship between the contact portions of the pair of signal contacts and the contact portions of the two ground contacts adjacent to the signal contacts is an inverted isosceles trapezoid.   2. The electrical connector according to claim 1, wherein the contact portion of the ground contact is closer to the circuit board than the contact portion of the signal contact, and the lengths of the signal contacts are all equal.   The electrical connector according to claim 1, wherein the signal contact and the ground contact have a connecting portion extending in a line along a rear wall of a base portion of the insulating housing.   4. The electrical connector according to claim 3, wherein the signal contact and the ground contact are arranged in a row in parallel with each of the terminal portion and the contact portion, and the plurality of contacts are of a surface mount type. .   The support tongue is formed with a first receiving groove in the upper row and a second receiving groove in the lower row through the insulating housing, and the contact portion of the ground contact is the first receiving groove. 2. The device according to claim 1, wherein the second contact groove is received so as to protrude from the first storage groove, and the contact portion of the signal contact protrudes from a lower surface of the support tongue. Electrical connector.   The support tongue is formed with a holding groove communicating with the first receiving groove and positioned below the first receiving groove, and the ground contact is held by the holding groove. The electrical connector according to claim 1.

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