CN117673784A

CN117673784A - Card edge connector and electronic system

Info

Publication number: CN117673784A
Application number: CN202211018354.XA
Authority: CN
Inventors: 杨奎; 胡小东
Original assignee: Amphenol Commercial Products Chengdu Co Ltd
Current assignee: Amphenol Commercial Products Chengdu Co Ltd
Priority date: 2022-08-24
Filing date: 2022-08-24
Publication date: 2024-03-08

Abstract

Embodiments of the present disclosure provide a card edge connector and an electronic system. The card edge connector includes: the electronic card comprises an insulating shell, a connecting piece and a connecting piece, wherein the insulating shell is provided with a butt joint surface and a mounting surface, and a slot which is used for receiving the electronic card and extends along the longitudinal direction is arranged on the butt joint surface; and a board lock having a connection portion connected to the mounting surface and a soldering portion configured for soldering to the circuit board based on a surface mount technology. With the card edge connector provided by the present disclosure, it may occupy only one surface of the circuit board. Thus, the other surface of the circuit board may be used to connect other card edge connectors. Therefore, the same circuit board can be simultaneously connected with two card edge connectors on the front side and the back side, so that the space utilization rate of the circuit board can be improved, and the purpose of miniaturization is achieved. And, because the connecting hole of connecting plate lock need not to set up on the circuit board, can have more spaces on the circuit board for the wiring to have better electric performance.

Description

Card edge connector and electronic system

Technical Field

The present disclosure relates generally to the field of connector technology, and in particular, to a card edge connector and an electronic system.

Background

Electrical connectors are used in many electronic systems. It is generally easier and more cost effective to manufacture a system on several circuit boards connected to each other by electrical connectors than to manufacture the system as a single component. Conventional arrangements for interconnecting several circuit boards typically use one circuit board as a backplane. Other circuit boards, referred to as daughter boards or daughter cards, are then connected to the backplane by electrical connectors to effect interconnection of the circuit boards.

The card edge connector (card edge connector) is widely used as an electrical connector in electronic products such as computers, and can be used for connecting electronic cards such as memory cards, video cards, sound cards and the like to a circuit board, so that the electronic cards provide memory capacity for the electronic products and enhance the operation speed of the electronic products. Such a card edge connector, on which a Board Lock (BL) is provided, exists under the specification of the joint electronics engineering council (Joint Electron Device Engineering Council, JEDEC). Typical plate locks include lugs (tab) and fork locks (fork lock). By providing a board lock, interconnection between the card edge connector and the circuit board can be achieved.

Disclosure of Invention

In order to at least partially solve the problems in the prior art, according to one aspect of the present disclosure, a card edge connector is provided. The card edge connector includes: the electronic card comprises an insulating shell, a connecting piece and a connecting piece, wherein the insulating shell is provided with a butt joint surface and a mounting surface, and a slot which is used for receiving the electronic card and extends along the longitudinal direction is arranged on the butt joint surface; and a board lock having a connection portion connected to the mounting surface and a soldering portion configured for soldering to a circuit board based on a surface mount technology.

The plate lock is illustratively provided at one or more of an intermediate position corresponding to the partition rib within the slot and an end position of the insulating housing.

Illustratively, the insulating housing is provided at both ends thereof with a first positioning post and a second positioning post protruding from the mounting surface, respectively, the first positioning post and the second positioning post being located on diagonal lines of the mounting surface.

Illustratively, the first and second positioning posts have different cross-sections.

Illustratively, a plate lock attachment slot is provided on the mounting surface, the attachment portion of the plate lock being in interference fit with the plate lock attachment slot.

Illustratively, the depth of the plate lock attachment slot is greater than the length of the attachment portion of the plate lock such that the position of the attachment portion within the plate lock attachment slot is adjustable.

Illustratively, the plate lock is provided with barbs on both sides of the connection portion that engage the side walls of the plate lock connection slot.

Illustratively, the card edge connector further comprises: a plurality of conductive elements, each of the plurality of conductive elements including a mating contact portion bent into the socket, a mounting tail portion extending beyond the mounting face, and an intermediate portion connected between the mating contact portion and the mounting tail portion.

Illustratively, the mounting tail is a surface mount technology based mounting tail, and an end surface of the solder portion parallel to the mounting surface is coplanar with an end surface of the mounting tail parallel to the mounting surface.

Illustratively, the connection is perpendicular to the weld, which is parallel to the mounting surface.

Illustratively, the plate lock further includes a curved portion connected between the connecting portion and the weld, the curved portion having a width that is less than a width of the connecting portion and the weld.

Illustratively, a recess is provided in the insulating housing at a location surrounded by the curved portion, an opening of the recess facing the curved portion.

Illustratively, gaps are formed between the periphery of the bending part and the insulating shell.

Illustratively, the weld is spaced apart from the insulating housing.

Illustratively, the connecting portion includes a first connecting portion and a second connecting portion disposed opposite to each other on both sides of the welding portion in a transverse direction, which is perpendicular to the longitudinal direction, so that the plate lock is U-shaped.

Illustratively, the first and second connection portions are parallel to the longitudinal direction.

Illustratively, the first and second connection portions are located on both sides of the slot in the lateral direction, respectively.

Illustratively, the connecting portion extends in a transverse direction perpendicular to the longitudinal direction.

Illustratively, the weld is bent toward the end of the insulating housing relative to the connection.

Illustratively, the weld is provided with a through hole.

The plate lock is, for example, in the form of a planar plate, which extends in a transverse direction perpendicular to the longitudinal direction.

Illustratively, the weld includes a first weld and a second weld disposed in spaced apart relation along the transverse direction.

Illustratively, a recess is provided in the middle of the connection portion on a side facing the abutment surface, a latch is provided at an end of the insulating housing, the latch being pivotable between a locked position and an unlocked position, and an opening of the recess faces a tail of the latch.

The tail portion of the latch has an outer side facing the avoidance groove and an inner side facing the slot, and both ends of the outer side in a transverse direction are respectively provided with a first notch and a second notch, so that a transverse width of the outer side is smaller than a transverse width of the inner side, wherein the transverse width of the avoidance groove is larger than the transverse width of the outer side and smaller than the transverse width of the inner side, and the transverse direction is perpendicular to the longitudinal direction.

According to another aspect of the present disclosure, an electronic system is provided. The electronic system includes: the circuit board is provided with a first surface and a second surface which are opposite, wherein the first surface is provided with a first welding pad, and the second surface is provided with a second welding pad; a first card edge connector, the first card edge connector being any one of the card edge connectors described above, a welded portion of a board lock of the first card edge connector being welded to the first pad; and a second card edge connector, the second card edge connector being any one of the card edge connectors described above, the welded portion of the board lock of the second card edge connector being welded to the second pad.

Illustratively, the first card edge connector and the second card edge connector are arranged in superposition in a direction perpendicular to the circuit board.

Illustratively, two first positioning holes and two second positioning holes are arranged on the circuit board at positions corresponding to two ends of the first card edge connector and the second card edge connector, wherein the two first positioning holes are symmetrically arranged about a central line of the first card edge connector extending along the longitudinal direction; and the two second positioning holes are symmetrically arranged about a center line of the first card edge connector extending in the longitudinal direction.

With the card edge connector provided by the present disclosure, it may occupy only one surface of the circuit board. Thus, the other surface of the circuit board may be used to connect other card edge connectors. Therefore, the same circuit board can be simultaneously connected with two card edge connectors on the front side and the back side, so that the space utilization rate of the circuit board can be improved, and the purpose of miniaturization is achieved. And, because the connecting hole of connecting plate lock need not to set up on the circuit board, can have more spaces on the circuit board for the wiring to have better electric performance.

In the summary, a series of concepts in a simplified form are introduced, which will be further described in detail in the detailed description section. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.

Advantages and features of the disclosure are described in detail below with reference to the accompanying drawings.

Drawings

The following drawings of the present disclosure are included as part of the disclosure herein for purposes of understanding the same. Embodiments of the present disclosure and descriptions thereof are shown in the drawings to explain the principles of the disclosure. In the drawings of which there are shown,

FIG. 1 is a perspective view of an electronic system according to an exemplary embodiment of the present disclosure;

fig. 2 is a cross-sectional view of the electronic system shown in fig. 1 taken in a plane perpendicular to the longitudinal direction;

fig. 3 is a perspective view of the circuit board shown in fig. 1;

FIG. 4 is an angled perspective view of a card edge connector according to an exemplary embodiment of the present disclosure;

FIG. 5 is another angled perspective view of the card edge connector shown in FIG. 4;

FIG. 6 is an enlarged view of a portion of the card edge connector shown in FIG. 5;

fig. 7 is a cross-sectional view of the card edge connector shown in fig. 4 taken in a plane perpendicular to the longitudinal direction;

fig. 8 is a partial enlarged view of the insulating housing shown in fig. 4;

FIG. 9 is a perspective view of the plate lock shown in FIG. 4;

FIG. 10A is a side view of the shackle shown in FIG. 4;

FIG. 10B is a perspective view of the latch shown in FIG. 4;

FIG. 11 is a perspective view of a card edge connector according to another exemplary embodiment of the present disclosure;

FIG. 12 is an enlarged view of a portion of the card edge connector shown in FIG. 11;

fig. 13 is a cross-sectional view of the card edge connector shown in fig. 11 taken in a plane perpendicular to the longitudinal direction;

FIG. 14 is a perspective view of the plate lock shown in FIG. 11;

Fig. 15 is a perspective view of a card edge connector according to yet another exemplary embodiment of the present disclosure;

FIG. 16 is an enlarged view of a portion of the card edge connector shown in FIG. 15;

fig. 17 is a cross-sectional view of the card edge connector shown in fig. 15 taken in a plane perpendicular to the longitudinal direction; and

fig. 18 is a perspective view of the plate lock shown in fig. 15.

Wherein the above figures include the following reference numerals:

100. a card edge connector; 110. a first card edge connector; 120. a second card edge connector; 200. an insulating housing; 201. a butt joint surface; 203. a mounting surface; 205. a middle position; 207. an end position; 210. a slot; 211. a partition rib; 221. a base; 222. a tower section; 231. a first positioning column; 232. a second positioning column; 250. a plate lock connecting groove; 270. a recessed portion; 300. 300', 300", plate lock; 310. a connection part; 311. a first connection portion; 312. a second connecting portion; 330. a welding part; 331. an end surface; 333. a through hole; 335. a first welded portion; 337. a second welded portion; 350. a barb; 370. a bending portion; 390. an avoidance groove; 400. a conductive element; 410. a mating contact portion; 430. mounting a tail part; 431. an end surface; 450. an intermediate portion; 500. locking; 510. tail part; 511. an outer side; 513. an inner side; 531. a first notch; 532. a second notch; 900. a circuit board; 911. a first surface; 912. a second surface; 931. a first bonding pad; 932. a second bonding pad; 951. a first positioning hole; 952. and a second positioning hole.

Detailed Description

In the following description, numerous details are provided to provide a thorough understanding of the present disclosure. However, it will be understood by those skilled in the art that the following description illustrates preferred embodiments of the present disclosure by way of example only and that the present disclosure may be practiced without one or more of these details. Furthermore, some technical features that are known in the art have not been described in detail in order to avoid obscuring the present disclosure.

Card edge connectors include, but are not limited to, DDR (double data rate) connectors. Card edge connectors are widely used for interconnection with electronic cards in electronic systems. Electronic cards include, but are not limited to, video cards or memory cards, and the like. The card edge connector is secured to the circuit board and conductive elements on the card edge connector interconnect with circuitry on the circuit board. The electronic card can be plugged into the card edge connector so that the golden finger on the electronic card is electrically connected with the conductive element on the card edge connector, thereby realizing the interconnection between the golden finger on the electronic card and the circuit on the circuit board.

In order to firmly fix the card edge connector on the circuit board, a board lock is arranged on the card edge connector. Both the conventional lug-type board lock and fork-type board lock require penetration from one side of the circuit board where the card edge connector is located to the other side of the circuit board. When the card edge connector is secured to the first surface of the circuit board, the board lock extends to the second surface of the circuit board. Through holes are needed to be arranged at positions on the circuit board corresponding to the board locks so that the board locks can pass through. Such a board lock may enable mechanical fixation between the card edge connector and the circuit board. The inventors have recognized and appreciated that either a lug-type board lock or a fork-type board lock requires that the board lock protrude from the second surface of the circuit board. Such connection structures are typically provided with recesses or engagement portions on the sides of the board lock, and after the board lock passes through the through-hole, the edge of the circuit board forming the through-hole is snapped into the recesses or engagement portions to retain the card edge connector on the circuit board.

The inventors have also recognized and appreciated that as the functionality of electronic cards becomes more complex and electronic systems move toward miniaturization, the space utilization of electronic systems needs to be further improved. In the above electronic system, since the board lock protrudes to the second surface of the circuit board, this means that if it is desired to provide another electrical connector on the second surface, the space occupied by the board lock needs to be avoided, which causes many limitations in reinstalling another electrical connector on the second surface. One of the most significant drawbacks associated with this is the low space utilization of the circuit board. And mounting the electrical connector on the circuit board ensures that the conductive elements on the electrical connector are able to interconnect with the circuitry within the circuit board, in addition to taking into account whether the space is sufficient to enable the electrical connector to be placed from outside. When the position of the electrical connector on the circuit board is subject to a number of constraints, there is a further need for a layout design of the wiring inside the circuit board and the pads on the surface of the circuit board. This significantly extends the cycle time and cost of product development. Furthermore, electronic devices of various types and sizes are often mounted on the circuit board, which are substantially fixed in position on the circuit board based on existing designs, in which case the possibility of the second surface of the circuit board being able to reinstall the desired electrical connector is limited. It is most likely that the same type of electrical connector will be reinstalled on the second surface at a location corresponding to the electrical connector on the first surface. However, under the above-mentioned dual restrictions in terms of external space and circuit design on the circuit board, it is likely that the desired electrical connector cannot be mounted any more on the second surface of the circuit board. In addition, when soldering the board lock to the through hole on the circuit board in the related art, reworking is difficult because the board lock is inserted into the through hole, as compared with the card edge connector of the present disclosure.

In some embodiments of the present disclosure, the board lock may be soldered to the circuit board by Surface Mount Technology (SMT). Thus, the board locks of different electrical connectors can be soldered to the first and second surfaces of the circuit board, respectively, thereby realizing the mounting of electrical connectors, such as card edge connectors, to the two surfaces, respectively. By the arrangement, the electronic system adopting the card edge connector disclosed by the embodiment of the invention can greatly improve the space utilization rate, thereby achieving the purpose of miniaturization.

The card edge connector and the electronic system of some embodiments are described in detail below with reference to the accompanying drawings.

For clarity and conciseness of description, the vertical direction Z-Z, the longitudinal direction X-X and the transverse direction Y-Y are defined. The vertical direction Z-Z, the longitudinal direction X-X and the transverse direction Y-Y may be perpendicular to each other. The vertical direction Z-Z generally refers to the height direction of the card edge connector. The longitudinal direction X-X generally refers to the length direction of the card edge connector. The transverse direction Y-Y generally refers to the width direction of the card edge connector.

As shown in fig. 4-7, the card edge connector 100 may include an insulating housing 200 and a board lock 300.

The insulating housing 200 may be molded from an insulating material such as plastic. The plastic may include, but is not limited to, liquid Crystal Polymer (LCP), polyphenylene sulfide (PPS), high temperature nylon or polyphenylene oxide (PPO), or polypropylene (PP), or other materials may be used. In some cases, the plastic may be a thermoset. In some cases, the insulating plastic may comprise an insulating material such as fiberglass reinforced. The insulating housing 200 may generally be a single piece. The insulating housing 200 may have a mating face 201 and a mounting face 203. In embodiments where the card edge connector 100 is a right angle connector, the mating face 201 and the mounting face 203 may be perpendicular to each other. In other types of card edge connectors 100, such as the vertical connector shown in the figures, the mating face 201 and the mounting face 203 may be parallel to each other. Regardless of the type of card edge connector 100, however, the roles of the mating face 201 and the mounting face 203 in the various card edge connectors are substantially identical.

The abutment surface 201 may be provided with a slot 210 extending in the longitudinal direction X-X. The slot 210 may be recessed toward the mounting surface 203 for receiving an edge of an electronic card (not shown). Electronic cards include, but are not limited to, memory cards or graphics cards, and the like. The edge of the electronic card may be plugged into slot 210. The slot 210 may have a partition rib 211 disposed therein. The partition rib 211 may be connected between two sidewalls of the socket 210 opposite in the lateral direction Y-Y. The separation rib 211 may function as a fool-proof to prevent misdirection of the insertion of the electronic card into the slot 210. And the partition rib 211 can also enhance the strength of the insulating housing 200.

The insulating housing 200 may include a base 221 and a tower 222. The housing 221 may extend in the longitudinal direction X-X. The tower 222 may be connected to an end of the base 221 in the longitudinal direction X-X. The tower 222 may extend in a vertical direction Z-Z to protrude upward from an end of the base 221. The socket 210 is mainly provided on the seat 221, and an end of the socket 210 may extend into the tower 222. Illustratively, the tower 222 may be provided only on one end of the base 221 in the longitudinal direction X-X. Desirably, the tower 222 may be provided on both ends of the seat 221 in the longitudinal direction X-X. The tower portions 222 may be located at opposite sides of the base 221 in the longitudinal direction X-X, respectively. The tower 222 may serve as a longitudinal end of the insulating housing 200.

The card edge connector 100 may also include a conductive element 400. The conductive member 400 may be disposed on the insulating housing 200. The conductive element 400 may include a plurality. Adjacent conductive elements 400 may be spaced apart to ensure electrical isolation between adjacent conductive elements 400 from each other. The conductive element 400 may be made of a conductive material such as metal. Each conductive element 400 is generally an elongated, unitary piece. The conductive element 400 may extend from the mounting surface 203 into the socket 210. Specifically, each conductive element 400 may include a mating contact portion 410, a mounting tail portion 430, and an intermediate portion 450 along its extension. The mating contact 410 may extend into the socket 210. Typically, the mating contact 410 is bent generally toward the interior of the socket 210 to protrude into the socket 210. The mounting tail 430 may extend beyond the mounting face 203. Intermediate portion 450 may be connected between mating contact portion 410 and mounting tail portion 430.

The conductive elements 400 may be arranged in two rows on either side of the socket 210 along the lateral direction Y-Y, each row extending along the longitudinal direction X-X. Alternatively, the two rows of conductive elements 400 may be aligned with each other along the longitudinal direction X-X. Optionally, the two rows of conductive elements 400 are staggered in the longitudinal direction X-X to increase the spacing between the conductive elements 400 to reduce cross-talk. Of course, if desired, the conductive element 400 may be located on the side of the socket 210.

In practical applications, when the edge of the electronic card is plugged into the slot 210, the golden finger of the electronic card can electrically contact the mating contact portion 410, so as to realize electrical connection. The mounting tail 430 may be attached to a circuit board. Typically, the mounting tail 430 may be a surface mount technology based mounting tail. The mounting tails 430 may be soldered to pads on the circuit board by surface mount technology to make electrical connection to the circuitry of the circuit board. In this manner, the card edge connector 100 may enable interconnection of an electronic card with circuitry on a circuit board.

The plate lock 300 may be made of a stronger material such as plastic, ceramic, metal, etc. Preferably, the plate lock 300 is a metal piece. The strength of the metal material is high, and the material and processing cost is low. So arranged, the plate lock 300 has high mechanical strength, is convenient to process, and has low material cost. The plate lock 300 may be a single piece, or a multi-segment splice.

As shown in fig. 6-7, the plate lock 300 may have a connection portion 310 and a weld portion 330. The connection portion 310 may be connected to the mounting face 203 of the insulating housing 200 by an interference fit, a connector connection, or the like. In one embodiment, as shown in connection with fig. 8, a plate lock attachment slot 250 may be provided on the mounting surface 203. The plate lock attachment slot 250 may be recessed from the mounting face 203 toward the mating face 201. The connection portion 310 of the plate lock 300 may be inserted into the plate lock connection groove 250 so as to be interference-fitted with the plate lock connection groove 250. So configured, the insulating housing 200 and the plate lock 300 may be manufactured separately and then connected together by assembly. This reduces the difficulty of manufacture and thus reduces the cost of manufacture. Alternatively, instead of being connected to the mounting surface 203 by way of a plug-in fitting, the plate lock 300 may be formed by injection molding the insulating housing 200 over the connection portion 310 in such a manner as to connect the connection portion 310 to the mounting surface 203. However, this may result in an increase in the processing cost of the insulating housing 200.

Illustratively, as shown in fig. 7 and 9, both sides of the connection portion 310 of the plate lock 300 may be provided with barbs 350. Each pair of barbs 350 may be located on opposite sides of the connection 310, respectively. Barb 350 may include one, two, or more pairs. Adjacent pairs of barbs 350 may be spaced apart in the direction of insertion of the connector 310 into the plate lock attachment slot 250. The barbs 350 may abut the sidewalls of the plate lock attachment slots 250 so as to engage the sidewalls of the plate lock attachment slots 250. By providing barbs 350, material consumption of board lock 300 may be reduced, thereby reducing the cost of card edge connector 100. Moreover, the abutting area of the connecting part 310 and the plate lock connecting groove 250 can be reduced, so that friction can be reduced in the plugging process, and the installation is convenient; and the possibility of the non-adaptation of the abutting surface caused by the non-flatness of the abutting surface can be reduced, and the requirement on the machining precision is reduced.

The solder 330 of the board lock 300 may be configured for soldering to a circuit board based on surface mount technology. Thus, by providing the board lock 300, the card edge connector 100 can be fixed to the circuit board. Illustratively, as shown in fig. 6, the weld 330 may have an end surface 331 that is parallel to the mounting surface 203. The mounting tail 430 of the conductive element 400 may have an end surface 431 parallel to the mounting surface 203. The end surface 331 of the solder 330 may be coplanar with the end surface 431 of the mounting tail 430. So configured, the solder portions 330 and the mounting tails 430 may simultaneously abut corresponding pads on the circuit board, and then the solder portions 330 of the mounting tails 430 and the board lock 300 are soldered to the circuit board by surface mount technology. In this way, the mounting efficiency can be improved.

Illustratively, as shown in fig. 7, the depth of the plate lock connection groove 250 may be greater than the length of the connection portion 310 of the plate lock 300. This allows the position of the connection portion 310 within the plate lock connection slot 250 to be adjustable. Thus, by adjusting the position of the connection portion 310, the height of the solder portion 330 can be adjusted so that the mounting surface 203 of the solder portion 330 can be coplanar with the end surface 431 of the mounting tail 430, or other desired effect can be achieved, depending on the position of the mounting tail 430. In addition, by increasing the depth of the plate lock connection groove 250, the possibility that the plate lock connection groove 250 and/or the connection portion 310 cannot be fully inserted into the plate lock connection groove 250 due to machining errors can be reduced, and the requirement for machining accuracy can be reduced.

The number of plate locks 300 may be any number including, but not limited to, one, two, or more. Preferably, the board lock 300 may be plural to enhance the connection strength of the interconnection between the card edge connector 100 and the circuit board. The arrangement of the plurality of plate locks 300 may be arbitrary. In one embodiment, the insulating housing 200 may have a middle position 205 and an end position 207. The intermediate position 205 may correspond to the partition rib 211 within the slot 210. The end positions 207 may be located at both ends of the intermediate position 205 in the longitudinal direction X-X. The plate lock 300 may be disposed at one or more of the intermediate position 205 and the end position 207. The number of plate locks 300 and the set positions can be selected by the user according to the actually required connection strength.

As shown in fig. 1-3, an electronic system may include a card edge connector 100 and a circuit board 900.

The circuit board 900 may have opposing first and second surfaces 911, 912. The first surface 911 and the second surface 912 may be oppositely disposed along the vertical direction Z-Z. The first surface 911 may be provided with a first pad 931. A second pad 932 may be disposed on the second surface 912.

The card edge connector 100 may include a first card edge connector 110 and a second card edge connector 120. The first card edge connector 110 and the second card edge connector 120 may be the same or different. The welding portion 330 of the board lock 300 of the first card edge connector 110 may be welded to the first welding pad 931. The welding portion 330 of the board lock 300 of the first card edge connector 110 may be disposed corresponding to the first pad 931. Of course, if the soldered portions 330 of several board locks 300 of the first card edge connector 110 are closely spaced, they may be soldered to one first pad 931. The soldering portion 330 of the board lock 300 of the second card edge connector 120 may be soldered to the second pad 932. The soldering portion 330 of the board lock 300 of the second card edge connector 120 may be disposed corresponding to the second pad 932. Of course, if the solder portions 330 of several of the board locks 300 of the second card edge connector 120 are closer together, they may be soldered to one of the second pads 932.

Thus, with the card edge connector 100 provided by the present disclosure, it may occupy only one surface of the circuit board. Thus, the other surface of the circuit board may be used to connect other card edge connectors 100. Therefore, the same circuit board can be simultaneously connected with two card edge connectors on the front side and the back side, so that the space utilization rate of the circuit board can be improved, and the purpose of miniaturization is achieved. And, because the connecting hole of connecting plate lock need not to set up on the circuit board, can have more spaces on the circuit board for the wiring to have better electric performance.

1-3, the first card edge connector 110 and the second card edge connector 120 may be disposed in registration in a direction perpendicular to the circuit board 900 (i.e., in a plane defined by the longitudinal direction X-X and the transverse direction Y-Y). So arranged, the layout of the electronic system is more compact to avoid taking up more space, thereby providing more application space for other components. Illustratively, the first and second pads 931 and 932 may be disposed in superposition in a direction perpendicular to the circuit board 900. Alternatively, in a direction perpendicular to the circuit board 900, the first and second pads 931 and 932 may be disposed in a staggered manner, and the soldering portion 330 of the board lock 300 of the first card edge connector 110 and the soldering portion 330 of the board lock 300 of the second card edge connector 120 may be disposed at different positions, respectively, and/or soldered to different positions on the first and second pads 931 and 932, respectively, to achieve overlapping disposition of the first and second card edge connectors 110 and 120.

Illustratively, as shown in fig. 5-8, the insulating housing 200 is provided at both ends thereof with a first positioning post 231 and a second positioning post 232, respectively. The first and second positioning posts 231 and 232, respectively, may protrude from the mounting surface 203. The first and second positioning posts 231 and 232 may be located on a diagonal of the mounting surface 203. Illustratively, in the laid-out state of the insulating housing 200 shown in fig. 5, the first positioning column 231 may be located at the upper left corner of the insulating housing 200, and the second positioning column 232 may be located at the upper right corner of the insulating housing 200.

Illustratively, as shown in fig. 3, two first positioning holes 951 and two second positioning holes 952 may be provided on the circuit board 900. Both of the first positioning holes 951 may be disposed on the circuit board 900 at positions corresponding to one ends (e.g., left ends) of the first and second card edge connectors 110 and 120. Both of the second positioning holes 952 may be provided at positions on the circuit board 900 corresponding to the other ends (e.g., right ends) of the first and second card edge connectors 110 and 120. Specifically, the first positioning post 231 and the second positioning post 232 of the first card edge connector 110 may be respectively inserted into one first positioning hole 951 and one second positioning hole 952 distributed on one diagonal line; the first positioning post 231 and the second positioning post 232 of the second card edge connector 120 may be inserted into another first positioning hole 951 and another second positioning hole 952, respectively, distributed on another diagonal line. So configured, the first and second card edge connectors 110, 120 may be positioned onto the circuit board 900 to facilitate connection to the circuit board 900. In addition, compared with other structures, the first positioning post 231 and the second positioning post 232 are located on the diagonal line of the mounting surface 203, so that the stress of the card edge connector 100 and the circuit board 900 can be more uniform, and the occurrence of deformation or cracking can be avoided.

The two first positioning holes 951 may be symmetrically disposed about a center line of the first card edge connector 110 extending in the longitudinal direction X-X. The two second positioning holes 952 may be symmetrically disposed about a center line of the first card edge connector 110 extending in the longitudinal direction X-X. So configured, the two first positioning holes 951 and the two second positioning holes 952 may be staggered so as to avoid interfering with each other. The symmetrical arrangement of the two first positioning holes 951 and the two second positioning holes 952 about the aforementioned midline provides significant benefits, as permitted by the circuitry on the circuit board. The card edge connector mounted on the first surface 911 of the circuit board 900 may also be mounted on the second surface 912 thereof, and the card edge connector mounted on the second surface 912 of the circuit board 900 may also be mounted on the first surface 911 thereof. Even in the case where the structures of the first positioning post 231 and the second positioning post 232 are different as will be mentioned later, it is possible to make each card edge connector double-sided mountable.

Illustratively, the first and second positioning posts 231, 232 may be the same or different. In a preferred embodiment, the first and second positioning posts 231, 232 may have different cross-sections. The cross section is a section formed by sectioning the first and second positioning posts 231 and 232 along the extending direction perpendicular to the first and second positioning posts 231 and 232, respectively. The cut-away breaks the first positioning post 231 and the second positioning post 232, and no longer has a complete structure. In the embodiment shown in the figures, the cross-section of the first positioning post 231 may be circular and the cross-section of the second positioning post 232 may be cloud-like. In other embodiments not shown in the drawings, the cross section of the first positioning post 231 may be circular, the cross section of the second positioning post 232 may be rectangular, etc., as long as the cross sections are different. The two different cross-section posts may act as a fool-proof feature to prevent misdirection of installation of the card edge connector 100.

Illustratively, as shown in fig. 9, the connection portion 310 of the plate lock 300 may be perpendicular to the welding portion 330. As shown in fig. 6, the solder 330 may be parallel to the mounting surface 203. So set up, the area of contact of welding portion 330 and the pad on the circuit board is great to can improve welded area, and then improve welded intensity.

Illustratively, as shown in FIG. 9, the plate lock 300 also includes a bend 370. The bent portion 370 may be connected between the connection portion 310 and the welding portion 330. The width of the bent portion 370 may be smaller than the widths of the connection portion 310 and the welding portion 330. The radius of curvature of the curved portion 370 may be arbitrary. Thus, the plate lock 300 is easier to form from a single plate material and has lower production cost. Also, since the bent portion 370 mainly serves to connect the connection portion 310 and the welding portion 330, reducing the width thereof may reduce material consumption of the board lock 300, thereby reducing the cost of the card edge connector 100.

Illustratively, as shown in fig. 7, a gap may be provided between the periphery of the bent portion 370 and the insulating housing 200. As described above, the bending portion 370 mainly functions to connect the connection portion 310 and the welding portion 330, and by providing the slit, the bending portion 370 can be prevented from contacting the insulating housing 200, thereby being prevented from being subjected to external force applied thereto by the insulating housing 200. In addition, the bent portion 370 is not in contact with the insulating housing 200, and also the contact area of the board lock 300 and the insulating housing 200 can be reduced, avoiding rapid transfer of heat on the welded portion 330 to the insulating housing 200 until reflow soldering in the surface mounting technology is performed, whereby stability of the insulating housing 200 in the surface mounting technology can be maintained in terms of performance, shape, and the like.

Illustratively, as shown in fig. 7-8, the insulating housing 200 is provided with a recess 270. The recess 270 may communicate with the plate lock connection groove 250. The bent portion 370 may cover a sidewall of the recess 270 so as to surround the recess 270. The opening of the recess 270 may face the bent portion 370. By providing the recess 270, the contact area between the insulating housing 200 and the board lock 300 can be reduced, and the heat transfer efficiency during reflow soldering can be reduced. But also reduces the material consumption for manufacturing the insulative housing 200, thereby reducing the cost of the card edge connector 100.

Illustratively, as shown in fig. 7, the weld 330 may be spaced apart from the insulating housing 200. Thus, the soldering portion 330 can restrain heat energy generated by soldering from being transferred to the insulating housing 200 during soldering to the soldering pad on the circuit board, thereby preventing deformation of the insulating housing 200 due to overheating.

For example, as shown in fig. 7-9, the connection portion 310 of the plate lock 300 may include a first connection portion 311 and a second connection portion 312. The first and second connection parts 311 and 312 may be oppositely disposed at both sides of the welding part 330 in the lateral direction Y-Y. The first and second connection portions 311 and 312 and the welding portion 330 may be connected by the bending portion 370, respectively. The plate lock 300 may be U-shaped. In an embodiment in which the board lock connection groove 250 is provided on the mounting surface 203, as shown in fig. 6 to 8, the first connection portion 311 and the second connection portion 312 may be respectively inserted into the two board lock connection grooves 250. The two plate lock attachment slots 250 may be oppositely disposed in the transverse direction Y-Y. By providing the first connection portion 311 and the second connection portion 312, the connection strength of the board lock 300 and the insulating housing 200 can be improved, thereby preventing the disconnection of the two.

Illustratively, as shown in FIG. 9, the first connection portion 311 and the second connection portion 312 may each be parallel to the longitudinal direction X-X. Since the card edge connector 100 generally extends in the longitudinal direction X-X, the longitudinal direction X-X is generally large in size and the transverse direction Y-Y is limited in size, the first connection portion 311 and the second connection portion 312 may be both parallel to the longitudinal direction X-X, and the insulating housing 200 may have sufficient space in the longitudinal direction X-X to accommodate the first connection portion 311 and the second connection portion 312. The first and second connection parts 311 and 312 may also be relatively large in size. This ensures that both the plate lock 300 and the insulating housing 200 have sufficient mechanical strength.

Illustratively, as shown in fig. 7, the first and second connection parts 311 and 312 may be located at both sides of the socket 210 in the lateral direction Y-Y, respectively. The first and second connection parts 311 and 312 may also function to protect the socket 210 from deformation or cracking of the socket 210.

Of course, the connection of the plate lock may also extend in the transverse direction Y-Y. In this case, the board lock may be located outside the locker 500, i.e., the connection portion of the board lock is closer to the end of the insulating case 200 than the locker 500. For example, as shown in fig. 11-14, the connection portion 310 of the plate lock 300' may extend in the lateral direction Y-Y. For example, as shown in fig. 15-18, the connecting portion 310 of the plate lock 300″ may extend in the lateral direction Y-Y. The connection portion 310 of the plate lock 300' in the embodiment shown in fig. 11-14 may have a similar structure to the connection portion 310 of the plate lock 300 "shown in fig. 15-18. While the connection portions 310 of the plate locks may extend in the transverse direction Y-Y, each plate lock may include only one connection portion 310.

Illustratively, as shown in fig. 18, the welding portion 330 may be bent toward the end of the insulating case 200 with respect to the connection portion 310. In this way, the welding portion 330 is closer to the outside of the insulating case 200, thereby facilitating welding.

Illustratively, as shown in fig. 18, a through hole 333 may be provided on the solder 330. So configured, the soldering portion 330 can also be soldered within the through hole 333 during soldering to the soldering pad on the circuit board, so that the soldering strength can be further improved. Also, by providing the through holes 333, material consumption of the board lock 300″ can be reduced, thereby reducing the cost of the card edge connector 100.

For example, as shown in fig. 11-14, the plate lock 300' may be planar plate-like. The plate lock 300' may extend in the lateral direction Y-Y. So arranged, the plate lock 300' is compact in structure and low in manufacturing cost.

Illustratively, as shown in fig. 14, the weld 330 may include a first weld 335 and a second weld 337. The first and second welded portions 335 and 337 may be disposed spaced apart in the lateral direction Y-Y. By providing the first and second solder portions 335 and 337, the contact area of the solder portion 330 with the pad on the circuit board is large, so that the area of soldering can be increased, and the soldering strength can be improved. A V-cut may be provided between the first and second welds 335 and 337 to facilitate separation of the plurality of plate locks 300' after manufacture together.

Only the differences between the three embodiments are described above, the same reference numerals are used for the same or similar parts of the three embodiments, and for the sake of brevity, these same or similar parts will not be described in detail herein.

As shown in fig. 4-7, the end of the insulating housing 200 may be provided with a latch 500. The shackle 500 may be pivotally connected to the end of the insulated housing 200 between a locked position and an unlocked position. Illustratively, the tail of the shackle 500 may be pivotally connected to the tower 222 between a locked position and an unlocked position. The heads of the latches 500 are inserted into grooves on the side edges of the electronic card when the latches 500 are in the latched position, thereby latching the electronic card to the card edge connector. The plate lock 300 may be disposed on the tower 222. The plate lock 300 may be disposed below the tail of the shackle 500. The first and second connection portions 311, 312 may be inserted into the tower 222 below the catch 500 from the mounting surface 203. Illustratively, as shown in fig. 9, a middle portion of a side of the connection portion 310 facing the abutment surface 201 may be provided with a relief groove 390. The relief slot 390 may open toward the tail 510 of the shackle 500. Illustratively, the latch 500 may retain the electronic card on the slot 210 when the latch 500 is in the latched position. When the latch 500 is in the unlocked position, the tail 510 of the latch 500 may jack up the electronic card, and the electronic card may be removed from the slot 210. Through setting up dodge groove 390, hasp 500 can be through dodging groove 390 pivotable between locking position and unblock position, can make the structure of card edge connector 100 more compact like this to realize miniaturized purpose.

4-8, the tail 510 of the shackle 500 may have an outer side 511 facing the relief groove 390 and an inner side 513 facing the slot 210. Both ends of the outer side 511 in the lateral direction Y-Y may be provided with a first notch 531 and a second notch 532, respectively. In this way, lateral width of lateral side 511 may be made smaller than lateral width of medial side 513. The lateral width of relief groove 390 may be greater than the lateral width of lateral side 511. The lateral width of the relief groove 390 may be less than the lateral width of the inner side 513. So configured, the latch 500 extends into the avoidance groove 390 to a greater extent, thereby making the structure of the card edge connector 100 more compact and achieving the purpose of miniaturization.

Thus, the present disclosure has been described in terms of several embodiments, but it will be appreciated that numerous variations, modifications, and improvements will readily occur to those skilled in the art in light of the teachings of the present disclosure, and are within the spirit and scope of the disclosure as claimed. The scope of the disclosure is defined by the appended claims and equivalents thereof. The foregoing embodiments are provided for the purpose of illustration and description only and are not intended to limit the disclosure to the embodiments described.

In the description of the present disclosure, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front", "rear", "upper", "lower", "left", "right", "transverse", "vertical", "horizontal", "top", "bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present disclosure and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be configured and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present disclosure; the orientation terms "inner" and "outer" refer to the inner and outer relative to the outline of the components themselves.

Moreover, while many inventive aspects are described above with reference to vertical connectors, it should be understood that aspects of the present disclosure are not limited thereto. As such, any one of the inventive features, either alone or in combination with one or more other inventive features, may also be used with other types of connectors, such as coplanar connectors, and the like.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one or more components or features' spatial positional relationships to other components or features as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass not only the orientation of the elements in the figures but also different orientations in use or operation. For example, if the element in the figures is turned over entirely, elements "over" or "on" other elements or features would then be included in cases where the element is "under" or "beneath" the other elements or features. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". Moreover, these components or features may also be positioned at other different angles (e.g., rotated 90 degrees or other angles), and all such cases are intended to be encompassed herein.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, components, assemblies, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be implemented in sequences other than those illustrated or described herein.

Claims

1. A card edge connector, comprising:

the electronic card comprises an insulating shell, a connecting piece and a connecting piece, wherein the insulating shell is provided with a butt joint surface and a mounting surface, and a slot which is used for receiving the electronic card and extends along the longitudinal direction is arranged on the butt joint surface; and

The board lock has a connection portion connected to the mounting surface and a soldering portion configured for soldering to a circuit board based on a surface mount technology.

2. The card edge connector of claim 1, wherein the board lock is provided at one or more of an intermediate position corresponding to the partition rib in the slot and an end position of the insulating housing.

3. The card edge connector according to claim 1, wherein the insulating housing is provided at both ends thereof with a first positioning post and a second positioning post protruding from the mounting surface, respectively, the first positioning post and the second positioning post being located on a diagonal line of the mounting surface.

4. The card edge connector of claim 3, wherein the first positioning post and the second positioning post have different cross-sections.

5. The card edge connector of any one of claims 1-4, wherein a board lock attachment slot is provided on the mounting surface, the attachment portion of the board lock being an interference fit with the board lock attachment slot.

6. The card edge connector of claim 5, wherein the depth of the plate lock attachment slot is greater than the length of the attachment portion of the plate lock such that the position of the attachment portion within the plate lock attachment slot is adjustable.

7. The card edge connector as claimed in claim 5, wherein both sides of the connection portion of the board lock are provided with barbs, the barbs being engaged with side walls of the board lock connection groove.

8. The card edge connector as in any one of claims 1-4, further comprising:

a plurality of conductive elements, each of the plurality of conductive elements including a mating contact portion bent into the socket, a mounting tail portion extending beyond the mounting face, and an intermediate portion connected between the mating contact portion and the mounting tail portion.

9. The card edge connector as defined in claim 8, wherein the mounting tail is a surface mount technology based mounting tail, and an end surface of the solder portion parallel to the mounting face is coplanar with an end surface of the mounting tail parallel to the mounting face.

10. The card edge connector of claim 1, wherein the connecting portion is perpendicular to the soldering portion, and the soldering portion is parallel to the mounting surface.

11. The card edge connector of claim 10, wherein the board lock further comprises a curved portion connected between the connecting portion and the welding portion, the curved portion having a width smaller than the connecting portion and the welding portion.

12. The card edge connector as claimed in claim 11, wherein a recess is provided in the insulating housing at a position surrounded by the bent portion, an opening of the recess facing the bent portion.

13. The card edge connector as claimed in claim 11, wherein gaps are provided between the periphery of the bent portion and the insulating housing.

14. The card edge connector of claim 10, wherein the weld is spaced apart from the insulating housing.

15. The card edge connector as claimed in claim 10, wherein the connecting portion includes a first connecting portion and a second connecting portion disposed oppositely on both sides of the welding portion in a lateral direction, the lateral direction being perpendicular to the longitudinal direction, so that the board lock is U-shaped.

16. The card edge connector of claim 15, wherein the first and second connection portions are parallel to the longitudinal direction.

17. The card edge connector as claimed in claim 15, wherein the first and second connection portions are located on both sides of the slot in the lateral direction, respectively.

18. The card edge connector as claimed in claim 10, wherein the connecting portion extends in a transverse direction perpendicular to the longitudinal direction.

19. The card edge connector of claim 18, wherein the weld is bent toward an end of the insulating housing relative to the connecting portion.

20. The card edge connector as claimed in claim 18, wherein the solder portion is provided with a through hole.

21. The card edge connector of claim 1, wherein the plate lock has a planar plate shape, the plate lock extending in a transverse direction perpendicular to the longitudinal direction.

22. The card edge connector of claim 21, wherein the weld includes a first weld and a second weld disposed in spaced relation along the lateral direction.

23. The card edge connector as claimed in any one of claims 18 to 21, wherein a center portion of a side of the connection portion facing the mating surface is provided with a relief groove, and an end portion of the insulating housing is provided with a latch pivotable between a locked position and an unlocked position, the relief groove opening toward a tail portion of the latch.

24. The card edge connector of claim 23, wherein the tail of the latch has an outer side facing the escape slot and an inner side facing the slot, and both ends of the outer side in a lateral direction are provided with a first notch and a second notch, respectively, such that a lateral width of the outer side is smaller than a lateral width of the inner side, wherein the lateral width of the escape slot is larger than the lateral width of the outer side and smaller than the lateral width of the inner side, and the lateral direction is perpendicular to the longitudinal direction.

25. An electronic system, comprising:

the circuit board is provided with a first surface and a second surface which are opposite, wherein the first surface is provided with a first welding pad, and the second surface is provided with a second welding pad;

a first card edge connector, the first card edge connector being the card edge connector of any one of claims 1-24, the solder portion of the board lock of the first card edge connector being soldered to the first solder pad; and

a second card edge connector as claimed in any one of claims 1 to 24, the welded portion of the board lock of the second card edge connector being welded to the second pad.

26. The electronic system of claim 25, wherein the first and second card edge connectors are disposed in registry in a direction perpendicular to the circuit board.

27. The electronic system of claim 26, wherein the circuit board is provided with two first positioning holes and two second positioning holes at positions corresponding to both ends of the first card edge connector and the second card edge connector, wherein

The two first positioning holes are symmetrically arranged about a central line of the first card edge connector extending along the longitudinal direction; and is also provided with

The two second positioning holes are symmetrically arranged about a center line of the first card edge connector extending in the longitudinal direction.