CN215869858U - A kind of interface unit - Google Patents

Abstract

A connector comprises an insulator, wherein a plurality of rows of contact elements are distributed on the insulator, the contact elements are divided into signal contact elements and grounding contact elements, the signal contact elements and the grounding contact elements have the same structure, and every two signal contact elements and every two grounding contact elements in the same row are arranged at intervals; and a conduction structure is arranged on the insulator between every two adjacent grounding contact pieces, and two ends of the conduction structure are in conduction connection with the corresponding grounding contact pieces. The high-speed performance is realized, the types of parts are reduced, and the problem that the common ground mode is not suitable for a high-density connector can be solved by only using one contact piece.

Description

A kind of interface unit

Technical Field

The utility model belongs to the technical field of connectors, and particularly relates to a connector.

Background

With the development of technology, the speed requirement of high-speed connectors is higher and higher, and the product performance of the connectors at high frequency is improved. For the existing backplane connector products, it is often adopted to connect all the ground pins (abbreviated as "G"), abbreviated as "common ground", as shown in fig. 1-1 to 1-2, and the common ground can optimize the return path on one hand and play a role in shielding on the other hand, so as to reduce the mutual interference between the differential pairs. The disadvantages of the above-mentioned method: the shielding plate can be added to the backplane connector to achieve the effect of common grounding, but due to the structural limitation, the above "common grounding" method is not suitable for the high-density interlayer connector.

If high speed is to be achieved in the mezzanine connector of the prior art, the signal pins and the ground pins are arranged alternately, and the ground pins are much wider than the signal pins for achieving good shielding effect, so that the contact has two structural forms. The current popular design concept is to reduce the part types and make the part types as few as possible on the premise of realizing good high-speed performance.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem that the common ground mode is not suitable for a high-density interlayer connector, the utility model provides a connector which can realize good high-speed performance and reduce the types of parts.

The purpose of the utility model is realized by adopting the following technical scheme. The connector comprises an insulator, wherein a plurality of rows of contact elements are distributed on the insulator, the contact elements are divided into signal contact elements and grounding contact elements, the signal contact elements and the grounding contact elements have the same structure, and every two signal contact elements and every two grounding contact elements in the same row are arranged at intervals; and a conduction structure is arranged on the insulator between every two adjacent grounding contact pieces, and two ends of the conduction structure are in conduction connection with the corresponding grounding contact pieces.

Furthermore, the contact element is sequentially provided with a contact area, a linear area and a pin area from the head part to the tail part, the pin area is vertical to the linear area, one surface of the pin area, which is far away from the linear area, is a solder ball placing surface, a concave pit is arranged on the solder ball placing surface, and a solder ball is arranged in the concave pit.

Furthermore, the pin area is connected with the linear area through connecting ribs, and the number of the connecting ribs is one or two.

Further, the pits are through holes or blind holes, and the pits are any one of rectangular pits and circular pits.

Furthermore, a plurality of ribs are distributed on the front surface of the insulator, grooves are distributed on two sides of each rib, holes corresponding to the grooves are formed in the insulator, and the contact pieces are inserted into the corresponding holes and the corresponding grooves; the tail end of the straight line area is provided with a barb which is clamped in the corresponding hole, and the contact area is positioned in the corresponding groove.

Further, the maximum width in the first direction between the outer sides of the contact areas of two adjacent signal contacts is smaller than the maximum width in the first direction between the outer sides of the contact areas of two adjacent ground contacts, and the projection of the outer sides of the contact areas of two adjacent signal contacts in the second direction falls within the range of the outer sides of the contact areas of two ground contacts in the partition wall row.

Further, the maximum width in the first direction outside the straight regions of two adjacent signal contacts is L1, the width in the first direction of the gap between the straight regions of two adjacent ground contacts is L2, the width in the first direction outside the straight regions of two adjacent ground contacts in the partition wall row is L3, and the relationship among the three is: l2 is more than or equal to 2T and less than L1, L3 is more than L1, the projection of L1 in the second direction falls in the range of L3, and T is the contact piece material thickness.

Furthermore, the maximum width of the outer sides of the pin areas of two adjacent signal contact pieces in the first direction is smaller than the maximum width of the outer sides of the pin areas of two adjacent ground contact pieces in the first direction, and the projection of the outer sides of the pin areas of two signal contact pieces in the second direction falls within the range of the outer sides of the pin areas of two ground contact pieces in the partition line.

Furthermore, the edge of the front side of the insulator is provided with a guide groove and a guide post for inserting and positioning with another electric connector; and the edge of the back of the insulator is provided with a positioning column for inserting and positioning the PCB.

Furthermore, a plurality of bulges are arranged on the back surface of the insulator, and each bulge is positioned between two rows of contact elements.

Compared with the prior art, the utility model discloses an useful part lies in: the high-speed performance is realized, the types of parts are reduced, and the problem that the common ground mode in the background art is not suitable for a high-density connector can be solved by only one contact piece.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following preferred embodiments are described in detail with reference to the accompanying drawings.

Drawings

FIG. 1-1 is a schematic view of a prior art backplane bend-like plug assembly;

FIG. 1-2 is a schematic view of the common ground of FIG. 1-1;

FIG. 2-1 is a front view of one embodiment of a connector of the present invention;

FIG. 2-2 is a side view of FIG. 2-1;

FIG. 2-3 is a partial cross-sectional view of FIG. 2-1;

fig. 2-4 is a perspective view of the front side of the insulator of fig. 2-1;

fig. 2-5 is a perspective view of the side of the insulator of fig. 2-1;

fig. 2-6 are partial cross-sectional views of the insulator of fig. 2-1;

fig. 2-7 is a perspective view of the back side of the insulator of fig. 2-1;

FIGS. 2-8 are enlarged views A of FIGS. 2-7;

FIGS. 2-9 are partial views of the insulator of FIG. 2-1;

fig. 2-10 is a cross-sectional perspective view of the insulator of fig. 2-1;

FIGS. 2-11 are perspective views of the contact of FIG. 2-1;

FIGS. 2-12 are perspective views of the contact of FIG. 2-1 from another perspective;

FIGS. 2-13 are enlarged partial views of a first contact structure of FIG. 2-1;

FIGS. 2-14 are enlarged partial views of a second contact structure of FIG. 2-1;

2-15 are enlarged partial views of a third contact structure of FIG. 2-1;

[ reference numerals ]

101-one-time injection molding, 102-two-time injection molding, 2-shielding sheets, 3-contact pieces, 301-differential signal pairs, 4-grounding, 5-insulators, 501-guide grooves, 502-guide posts, 503-ribs, 504-groove I, 505-groove II, 506-protrusions, 507-fixing areas, 508-avoiding areas I, 509-avoiding areas II, 510-hole I, 511-hole II, 512-limiting areas I, 513-limiting areas II, 514-positioning posts, 6-contact pieces, 601-signal contact pieces, 602-grounding contact pieces, 603-contact areas, 604-linear areas, 605-pin areas, 606-pits, 607-connecting ribs, 608-barbs, 609-rectangular pits, 610-circular pits, 611-solder ball placement surface, 7-solder ball, 8-conduction structure.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

One embodiment of a connector of the present invention is shown in fig. 2-1 through 2-15. The electrical connector comprises an insulator 5, a contact 6, a solder ball 7 and a conducting structure 8, wherein the contact 6 comprises a signal contact 601 and a grounding signal contact 60102.

The insulator 5 is a rectangular plate, the extending direction of the longer side of the insulator 5 is the first direction, the extending direction of the shorter side is the second direction, the plugging surface of the connector is the front surface, the other surface of the connector is the back surface, the end of the contact 6 which is in contact fit with the contact of another electric connector is the head, and the other end of the contact 6 is the tail.

The signal contacts 601 and the ground contacts 602 are fixed on the insulator 5, the signal contacts 601 and the ground contacts 602 form a multi-row array, each row of the array is parallel to the first direction, the signal contacts 601 and the ground contacts 602 of each row of the array are distributed at intervals, at least 5 rows of the array are arranged in the second direction of the insulator 5, and in the embodiment, 7 rows of the array are arranged. The signal contact 601 is represented by S, the ground contact 602 is represented by G, and the distribution rule of the signal contacts 601 and the ground contacts 602 in each row is as follows: G-G-S-S-G-G- … …, which can realize the demand of high density and miniaturization, thereby realizing higher transmission rate. Solder balls 7 are welded at the tail parts of the signal contact 601 and the grounding contact 602, and the solder balls 7 are in contact with the PCB, heated and cooled to realize the conductive connection between the signal contact 601 and the PCB. The conducting structures 8 are fixed inside the insulator 5, and the conducting structures 8 are arranged between the adjacent ground contacts 602 and are used for conducting the corresponding adjacent ground contacts 602.

The front face of the longer edge of the insulator 5 is provided with a guide groove 501 and a guide post 502, and the guide post 502 and the guide groove 501 are inserted into a guide groove and a guide post corresponding to another electrical connector to play a role in positioning and guiding. The rear side of the longer edge of the insulating body 5 is provided with a positioning post 514, and the positioning post 514 is used for positioning when the electric connector is mounted on a PCB.

The front surface of the insulator 5 is provided with a plurality of ribs 503 extending in the first direction, and in the present embodiment, there are four ribs 503 in total. The cross-sectional shape of the rib 503 is a convex shape, both sides of the rib 503 along the first direction are provided with grooves, the groove for inserting the signal contact 601 is a groove I504, the groove for inserting the ground contact 602 is a groove II505, only the inner side of one rib 503 at the edge is provided with the grooves I504 and II505, the grooves I504 correspond to the number of the signal ground pins 601 one by one, and the grooves II505 correspond to the number of the ground signal pins 602 one by one. The bottoms of the grooves I504 and II505 and the insulators 5 at the corresponding positions are provided with holes penetrating through the insulators 5, the hole corresponding to the groove I504 is a hole I510, the hole corresponding to the groove II505 is a hole II511, the grooves I504 and II505 have the same structure, and the holes I510 and II511 have the same structure. The hole I510 and the hole II511 are equally divided into a fixed area 507, a avoiding area I508 and a avoiding area II509, the avoiding area I508 is located at the bottom of the corresponding groove I504 or groove II505, the fixed area 510 and the avoiding area I511 are located on the insulator 5 between the rib 503 and the rib 503, the avoiding area I511 and the avoiding area II512 are equal in width in the first direction, the width of the fixed area 510 is larger than the avoiding area I511 and the avoiding area II512 and is equal to the width of the groove I504 and the groove II505, and the fixed area 510 is located between the avoiding area I511 and the avoiding area II 512. Two side walls of the avoiding region II509 are limiting regions for limiting the position of the tail of the contact element, the limiting region for limiting the signal contact element 601 is a limiting region I512, and the limiting region for limiting the ground contact element 602 is a limiting region II 513. Every four adjacent holes in the same row are grouped into a group, the middle two adjacent holes in a group are holes I510 for inserting corresponding signal contacts 601, and the two holes on the outer side are holes II511 for inserting corresponding ground contacts 602.

In the second direction on the back side of the insulator 5, there is a protrusion 506 between each row of holes. When the electrical connector is pressed on the PCB, the protrusion 506 increases the distance between the electrical connector and the PCB, so as to ensure that the solder ball 7 is not flattened and increase the strength of the insulator 5.

The structure of each contact 6 is the same, namely: the signal contact 601 and the ground contact 602 have the same structure, and can be completed by the same mold, and the mold structure is simpler. The contact 6 includes a contact region 603, a straight region 604, and a pin region 605. The contact member 6 is made of a single elongated plate and has a main body in the form of a linear section 604. The contact region 603 is located at the head of the contact 6 in the direction in which the linear region 604 extends, and projects to one side. Another extending direction of the linear region 602 is a lead region 605, and the lead region 605 is located at the tail of the contact 6, and the end thereof is tilted, and the tilting direction is opposite to the protruding direction of the contact region 603. The straight section 604 is provided with barbs 608 near the pin section 605, and the barbs 608 are disposed on two sides of the straight section 604 for catching on the fixing section 507 to fix the signal contact 601. When the contact 6 is inserted into the corresponding position on the insulator 5, the contact area 603 of the contact 6 is located in the groove I504 or the groove II505, and the convex direction of the contact area 603 of the contact 6 is towards the outer side of the groove I504 or the groove II505 for contacting and conducting connection with a contact of another electrical connector.

The lead area 605 includes a connecting rib 607, and the main body of the lead area 605 is a flat plate and perpendicular to the linear area 604, so as to conveniently place the solder ball 8. The pin area 605 is connected to the linear area 604 via a connecting rib 607, in this embodiment, two connecting ribs 607 are provided, as shown in fig. 2-11 and 2-12, in other embodiments, one connecting rib may be provided, as shown in fig. 2-15, or in other forms. The lead area 605 has a solder ball placement surface 611 on a surface thereof facing away from the linear area 604, and the solder ball placement surface 611 has a recess 606. The accuracy of the position of the solder ball 8 can be improved by adjusting the structure of the solder ball placement surface 611 and the shape and size of the recess 606, mainly because: the soldering process of the solder ball 8 and the contact 6 is as follows: firstly, placing the solder balls 8 on the pin area 605 of the contact element 6, and then placing the solder balls on a chain belt of a reflow oven for reflow soldering so as to solder the solder balls and the chain belt together; the lead area 605 is added with the pit 606, so that on one hand, when the solder ball 8 is placed at the tail of the contact element 6 in the reflow soldering process, the low position accuracy of the solder ball 8 caused by factors such as shaking and the like can be avoided; on the other hand, since the solder ball 8 is in a liquid state after entering the reflow furnace, and the liquid droplet gradually spreads on the solid surface to wet the solid surface according to the property of the solid surface, this phenomenon is called a wetting phenomenon, and if the attraction of the liquid molecules on the solid surface is strong, the solid surface is hydrophilic and has good wettability, and if the attraction is opposite, the solid surface is hydrophobic and has bad wettability, so that the wettability of the surface of the pin region 605 can be adjusted by the concave pit 606 to adjust and improve the positional accuracy of the solder ball 8. The dimple 606 may be a through hole or a blind hole and may be in the shape of a rectangular dimple 609, as shown in fig. 2-13, or a circular dimple 610, as shown in fig. 2-14.

The conductive structure 8 has a material conductivity superior to that of the insulator 5, and the conductive structure 8 is located between the adjacent holes II 511. The ground contact 602 is fitted into the hole II511, the signal contact 601 is fitted into the hole I510, the via structure 8 is positioned between the two holes I510, and the ground contacts 602 are assembled so that the adjacent ground contacts 602 are conductively connected through the via structure 8.

Two adjacent signal contacts 601 form a differential pair, the maximum width in the first direction between the outer sides of the contact areas of one differential pair is smaller than the maximum width in the first direction between the outer sides of the contact areas of two adjacent ground contacts 602 of adjacent groups in the same row, and is smaller than the maximum width in the first direction between the outer sides of the contact areas of two adjacent ground contacts 602 of adjacent groups in a partition wall row, and the projection in the second direction of the outer sides of the contact areas of two adjacent signal contacts 601 falls within the range of the outer sides of the contact areas of two ground contacts 602 in the partition wall row.

The maximum width in the first direction of the outer side of the straight line region of one differential pair is L1, the width in the first direction of the gap between the straight line regions of two adjacent ground contacts 602 in the same row or the next-to-wall row is L2, and the width in the first direction of the outer side of the straight line region of two adjacent ground contacts 602 is L3, the relationship between the three being: l2 is more than or equal to 2T and less than L1, L3 is more than L1, the projection of L1 in the second direction falls in the range of L3, and T is the contact piece material thickness.

The maximum width of the outer sides of the lead areas of one differential pair in the first direction is smaller than the maximum width of the outer sides of the lead areas of two ground contacts 602 in the adjacent group in the first direction, and is smaller than the maximum width of the outer sides of the lead areas of two ground contacts 602 in the partition row in the first direction, and the projection of the outer sides of the lead areas of two signal contacts 601 in the second direction falls within the range of the outer sides of the lead areas of two ground contacts 602 in the partition row.

Before the contacts are inserted, the signal contacts 601 and the ground contacts 602 used in a row are located on the same material belt, after the contacts are machined, the tails of the contacts needed in the same row are connected with the material belt through connecting materials, and adjacent contacts are also connected through connecting materials. The S-S spacing, the S-G spacing, the G-G spacing and the corresponding position spacing of each group of contact of the finished connector are respectively and correspondingly the same as the S-S spacing, the S-G spacing, the G-G spacing and the corresponding position spacing of each group of contact designed on the material belt. During assembly, the material belt is assembled in one row at one time, and after the assembly is in place, the tail connecting material is shaken and broken off; the technology can finish product assembly by only assembling for a plurality of times, greatly improves the assembly efficiency and can also ensure the true position of the product. The contact elements are distributed on the material belt in a G-G-S-S-G-G-S-S arrangement, and in other connectors, the contact elements can also be arranged in a G-S-S-G-S-S arrangement so as to be suitable for a backplane connector or a sandwich connector or other connectors.

Taking the present invention as an example, if the conventional assembly is adopted, one grounding pin is installed at a time, or a pair of signal pins are installed at a time, the whole assembly needs 146 times to be completed. If the design that the space between the contact elements in the material belt 9 is the same as that between the contact elements in the connector is adopted, the assembly is carried out in one row at one time, after the assembly is in place, the broken tail part connecting material is shaken, the assembly can be completed only by 7 times of assembly, and the assembly time can be saved by about 95 percent. The technology can finish product assembly by only assembling for a plurality of times, greatly improves the assembly efficiency and can also ensure the true position of the product.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (10)

1. Connector comprising an insulating body (5), on which insulating body (5) rows of contacts (6) are distributed, characterized in that: the contact (6) is divided into a signal contact (601) and a ground contact (602), the signal contact (601) and the ground contact (602) have the same structure, and every two signal contacts (601) and two ground contacts (602) in the same row are arranged at intervals; and a conducting structure (8) is arranged on the insulator (5) between every two adjacent grounding contact pieces (602), and two ends of the conducting structure (8) are in conducting connection with the corresponding grounding contact pieces (602).

2. A connector according to claim 1, wherein: the structure of the contact element (6) is sequentially provided with a contact area (603), a linear area (604) and a pin area (605) from the head to the tail, the pin area (605) is vertical to the linear area (604), one surface of the pin area (605), which is far away from the linear area (604), is a solder ball placing surface (611), a concave pit (606) is arranged on the solder ball placing surface (611), and a solder ball (7) is arranged in the concave pit (606).

3. A connector according to claim 2, wherein: the pin area (605) is connected with the linear area (604) through connecting ribs (607), and the number of the connecting ribs (607) is one or two.

4. A connector according to claim 2, wherein: the pit (606) is a through hole or a blind hole, and the pit (606) is any one of a rectangular pit (609) and a circular pit (610).

5. A connector according to claim 2, wherein: a plurality of ribs (503) are distributed on the front surface of the insulator (5), grooves are distributed on two sides of the ribs (503), holes corresponding to the grooves are formed in the insulator (5), and the contact pieces (6) are inserted in the corresponding holes and grooves; the tail end of the linear area (604) is provided with a barb (608), the barb (608) is clamped in the corresponding hole, and the contact area (603) is arranged in the corresponding groove.

6. A connector according to claim 2, wherein: the maximum width in the first direction between the contact area outer sides of two adjacent signal contacts (601) is smaller than the maximum width in the first direction of the contact area outer sides of two adjacent ground contacts (602), and the projection of the contact area outer sides of the two adjacent signal contacts (601) in the second direction falls within the range of the contact area outer sides of the two ground contacts (602) in the partition wall row.

7. A connector according to claim 2, wherein: the maximum width of the outer sides of the straight regions of two adjacent signal contacts (601) in the first direction is L1, the width of the gap between the straight regions of two adjacent ground contacts (602) in the first direction is L2, and the width of the outer sides of the straight regions of two adjacent ground contacts (602) in the partition line in the first direction is L3, wherein the relationship among the three is as follows: l2 is more than or equal to 2T and less than L1, L3 is more than L1, the projection of L1 in the second direction falls in the range of L3, and T is the contact piece material thickness.

8. A connector according to claim 2, wherein: the maximum width of the outer sides of the pin areas of two adjacent signal contacts (601) in the first direction is smaller than the maximum width of the outer sides of the pin areas of two adjacent ground contacts (602) in the first direction, and the projection of the outer sides of the pin areas of two signal contacts (601) in the second direction falls within the range of the outer sides of the pin areas of two ground contacts (602) in the partition wall row.

9. A connector according to claim 1, wherein: the edge of the front surface of the insulator (5) is provided with a guide groove (501) and a guide post (502) which are used for being inserted and positioned with another electric connector; and the edge of the back surface of the insulator (5) is provided with a positioning column (514) for inserting and positioning with the PCB.

10. A connector according to claim 1, wherein: the back of the insulator (5) is provided with a plurality of bulges (506), and each bulge (506) is positioned between two rows of contact elements (6).

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