This application claims priority to and the benefit of Chinese Patent Application Serial Nos. 202220224390.0 and 202210097418.3, both filed on Jan. 27, 2022, both entitled “CARD EDGE CONNECTOR WITH PRESSURE MOUNT AND ELECTRONIC SYSTEM.” The contents of these applications are incorporated herein by reference in their entirety.
This application relates to electrical connectors, such as those used to interconnect electronic assemblies.
Card edge connectors are used widely in electrical systems. It is generally easier and more cost effective to manufacture components of an electrical system on several printed circuit boards (PCBs), and to connect the PCBs to other components of the electrical system using card edge connectors than to manufacture the electrical system as a single component. Sometimes, one PCB may be used as a main board or motherboard, while other PCBs in the system may be referred to as daughter boards or daughter cards that are connected to the motherboard by card edge connectors to interconnect these PCBs. In a computer, card edge connectors may be used on a motherboard to receive a memory card, a graphics card, or other PCBs that provide other functionalities.
One type of a card edge connector is a memory socket for receiving a memory card. The memory socket may be used, for example to interconnect a memory daughter card with a motherboard. DDR5 (Double Data Rate Gen 5) is a memory specification widely used in computers today. A daughter card using DDR5 may be interconnected with the motherboard of a computer through a card edge connector. The card edge connector is fixed on the motherboard, and conductive elements on the card edge connector are interconnected with circuits on the motherboard. The daughter card is inserted into the card slot of the card edge connector, so that the pads on the daughter card are electrically connected with corresponding conductive elements on the card edge connector, so as to provide electrical interconnection with circuitry on the motherboard through the card edge connector.
A known card edge connector includes a housing having a slot defined by two opposing side walls for receiving a daughter card. Each of the opposing side wall may include a row of openings exposing a plurality of conductive elements. A mating contact portion of a conductive element may extend into the slot through a corresponding opening in the side wall, such that when a daughter card is inserted into the slot, the conductive element may be electrically connected with a corresponding conductive pad on the daughter card via the contact portion. The card edge connector may also include an ejector for ejecting the daughter card and a lock for locking the daughter card in the slot.
Computers may be manufactured with multiple card edge connectors to receive multiple memory cards. Some computers may be manufactured with memory cards in all of those connectors. For cost reasons, other computers of the same design may be manufactured with memory cards in only some of the connectors. The user of those computers then has the option to later add memory cards where more performance from the computer is desired.
Aspects of the present disclosure relate to field installable card edge connectors.
Some embodiments relate to an electrical connector. The electrical connector may include a housing comprising a mating surface, a mounting surface separated from the mating surface in a vertical direction, and a slot extending through the mating surface and elongated in a longitudinal direction perpendicular to the vertical direction; and a plurality of conductive elements held in the housing, each of the plurality of conductive elements comprising a mating end curving into the slot, a mounting end extending out of the mounting surface and configured for pressure mount, and an intermediate portion joining the mating end and the mounting end.
Optionally, for each of the plurality of conductive elements: the mounting end may extend from the intermediate portion at an angle to the vertical direction; and the angle may be greater than zero degree and less than ninety degrees.
Optionally, the mounting end may comprise a contact surface perpendicular to the vertical direction.
Optionally, the contact surface may comprise a conductive layer.
Optionally, for each of the plurality of conductive elements: the mounting end may be thinner and/or narrower than the intermediate portion.
Optionally, for each of the plurality of conductive elements, the mounting end may be thinner than the mating end.
Optionally, for each of the plurality of conductive elements: the mating end may comprise a first curved portion and a second curved portion; the first curved portion may join the second curved portion and the intermediate portion; and the second curved portion may comprise a mating contact region in the slot.
Optionally, the housing may comprise a pair of towers disposed at opposite ends of the slot and a pair of latches pivotably attached to respective ones of the pair of towers; and each of the pair of towers may comprise a lug extending outwards of the slot and comprising a mounting hole extending therethrough.
Optionally, the housing may comprise another mounting hole disposed between the pair of towers.
Some embodiments relate to an electrical connector. The electrical connector may include a housing comprising a mating surface, a mounting surface separated from the mating surface in a vertical direction, and a slot extending through the mating surface and elongated in a longitudinal direction perpendicular to the vertical direction; a plurality of conductive elements held in the housing, each of the plurality of conductive elements comprising a mating end curving into the slot and a mounting end extending out of the mounting surface; and a member at least partially disposed on the housing and comprising a slot aligned with the slot of the housing.
Optionally, the member may comprise a pair of openings; and the housing may comprise a pair of towers disposed at opposite ends of the slot and extending through respective ones of the pair of openings and in the vertical direction.
Optionally, the housing may comprise one or more mounting holes; and the member may comprise one or more mounting holes aligned with respective ones of the one or more mounting holes of the housing.
Optionally, the one or more mounting holes of the member may comprise a first mounting hole disposed outside the pair of towers and a second mounting hole disposed between the pair of towers.
Optionally, the member may comprise a first portion disposed on the mating surface; and the first portion of the member may comprise the slot of the member.
Optionally, the member may comprise a second portion extending from the first portion and in the vertical direction.
Optionally, the member may comprise material stronger than material of the housing.
Some embodiments relate to an electronic system. The electronic system may include a printed circuit board comprising a memory bus; a first electrical connector electrically coupled to the memory bus; a second electrical connector disposed next to the first electrical connector and electrically coupled to the memory bus; and a connecting member holding both the first electrical connector and the second electrical connector to the printed circuit board.
Optionally, the connecting member may extend through a hole; the first electrical connector may comprise a first housing comprising a first portion of the hole; and the second electrical connector may comprise a second housing comprising a second portion of the hole.
Optionally, the first electrical connector may comprise a first housing and a first member at least partially disposed on the first housing; and the connecting member may hold the first member of the first electrical connector to the printed circuit board.
Optionally, the second electrical connector may comprise a second housing and a second member at least partially disposed on the second housing; and the connecting member may hold the second member of the second electrical connector to the printed circuit board.
Some embodiments relate to a card edge connector with pressure mount. The card edge connector with pressure mount may include an insulating housing and a plurality of conductive elements. The insulating housing may have a mating surface and a mounting surface opposite in a vertical direction, and a card slot through the mating surface. The plurality of conductive elements may be held in the insulating housing. Each of the plurality of conductive elements may have an mating end and a mounting end configured for pressure mount, the mating end may extend into the card slot, and the mounting end may extend out of the mounting surface for pressure mount to a contact pad on a circuit board.
Optionally, an insulating housing mounting hole may be formed in the insulating housing.
Optionally, a tower may be arranged at an end, in a longitudinal direction perpendicular to the vertical direction, of the insulating housing, the insulating housing mounting hole may comprise a first insulating housing mounting hole and/or a second insulating housing mounting hole, the first insulating housing mounting hole may be formed at the outer side of the tower in the longitudinal direction, and the second insulating housing mounting hole may be formed in the middle of the insulating housing in the longitudinal direction.
Optionally, the tower may be provided with a first lug, the first lug may extend along the mounting surface, and the first insulating housing mounting hole may be formed in the first lug.
Optionally, a latch may be pivotally connected to the tower, and the first lug may not extend beyond, in the longitudinal direction, the latch pivoted to an unlocked position.
Optionally, the second insulating housing mounting hole may be formed inside the insulating housing.
Optionally, the second insulating housing mounting hole may be formed on the side, extending in the longitudinal direction, of the insulating housing.
Optionally, the second insulating housing mounting hole may be half hole, the half hole may communicate with the external along a transverse direction in a cross section of the half hole, the transverse direction is perpendicular to the longitudinal direction and the vertical direction.
Optionally, the second insulating housing mounting hole may be configured to form a through hole with a second insulating housing mounting hole formed in an adjacent card edge connector with pressure mount to share a same connecting member.
Optionally, an insulating housing recess and a second lug may be arranged on the side, extending in the longitudinal direction, of the insulating housing; the second lug, adjacent to the mounting surface, may extend outward in the transverse direction from the interior of the insulating housing recess; and the second insulating housing mounting hole may be formed in the second lug, wherein the transverse direction is perpendicular to the longitudinal direction and the vertical direction.
Optionally, the card edge connector with pressure mount may further comprise a member. The member may be mounted on one side, on which the mating surface is located; a slot exposing the card slot may be formed in the member; and the member may be used for applying pressure to the insulating housing.
Optionally, the member may comprise a cover plate; the cover plate may cover the mating surface; and the slot may be formed in the cover plate.
Optionally, a flange, extending toward the mounting surface, may be arranged at the side edge of the cover plate and abut against the side surface of the insulating housing.
Optionally, the cover plate and the flange may be sized to provide the desired signal integrity and the desired robustness.
Optionally, a tower may be arranged at an end, in a longitudinal direction perpendicular to the vertical direction, of the insulating housing; a tower opening may be further formed in an end of the cover plate; and the tower may extend through the tower opening.
Optionally, the cover plate may comprise a first sub-cover plate and a second sub-cover plate; and the first sub-cover plate and the second sub-cover plate may be spaced apart from each other to form the tower opening and the slot.
Optionally, the cover plate may further comprise an end plate; the end plate may connect the first sub-cover plate and the second sub-cover plate on the outer side, in the longitudinal direction, of the tower; and a first stiffener mounting hole may be formed in the end plate.
Optionally, the end plate may be closer to the mounting surface rather than the mating surface.
Optionally, the insulating housing may be of an elongated structure; and a second stiffener mounting hole may be formed on the side, extending in the longitudinal direction, of the member.
Optionally, the second stiffener mounting hole may be a half hole, the half hole may communicate with the external along a transverse direction in a cross section of the half hole, and the transverse direction is perpendicular to the longitudinal direction and the vertical direction.
Optionally, the second stiffener mounting hole may be configured to form a through hole with a second stiffener mounting hole formed in a member of an adjacent card edge connector with pressure mount to share a same connecting member.
Optionally, a stiffener recess may be arranged on the side, extending in the longitudinal direction, of the insulating housing, a hole seat adjacent to the mounting surface may be formed inside the stiffener recess, and the second stiffener mounting hole may be formed in the hole seat.
Optionally, the member may be provided with a stiffener mounting hole aligned with the insulating housing mounting hole formed in the insulating housing.
Optionally, the member may be made of metal and used for grounding.
Optionally, the thickness of the mounting end is smaller than that of the mating end.
Optionally, an intermediate portion may be arranged between the mounting end and the mating end; and the thickness of the intermediate portion may be larger than that of the mounting end.
Optionally, an intermediate portion may be arranged between the mounting end and the mating end and may be fixed in the insulating housing; the mating end may comprise a V-shaped portion and a U-shaped portion; one end of the V-shaped portion may be connected to the intermediate portion and the other end may connected to an end of the U-shaped portion at the inner side of the intermediate portion; and a bend of the U-shaped portion may form a contact region.
Optionally, the mounting end may obliquely extend toward an outer side of the insulating housing.
Optionally, a tip may be connected to the end of the mating end and limited in a mounting groove for the conductive element having the tip thereon.
Optionally, the tip may be configured to be short enough that a distance between a contact region of the mating end bent in the card slot and an opening of the card slot is smaller than a preset distance.
Some embodiments relate to a card edge connector with pressure mount. The card edge connector with pressure mount may comprise an insulating housing having a mating surface and a mounting surface, wherein a card slot may be through the mating surface; a plurality of conductive elements may be held in the insulating housing, wherein each of the plurality of conductive elements may have a mating end and a mounting end, the mating end may extend into the card slot, and the mounting end may extend out of the mounting surface; and a member may be mounted on the insulating housing and used for applying pressure to the insulating housing to enable the mounting end to pressure mount to a contact pad on the circuit board.
Optionally, an insulating housing mounting hole may be formed in the insulating housing.
Optionally, a tower may be arranged at the end, in a longitudinal direction, of the insulating housing; the insulating housing mounting hole may comprise a first insulating housing mounting hole and/or a second insulating housing mounting hole; the first insulating housing mounting hole may be formed at the outer side of the tower in the longitudinal direction; and the second insulating housing mounting hole may be formed in the middle of the insulating housing in the longitudinal direction.
Optionally, the tower may be provided with a first lug; the first lug may extend along the mounting surface; and the first insulating housing mounting hole may be formed in the first lug.
Optionally, a latch may be pivotally connected to the tower; and a projection of the latch pivoted to an unlocked position on the mounting surface may cover a projection of the first lug on the mounting surface.
Optionally, the second insulating housing mounting hole may be formed inside the insulating housing.
Optionally, the second insulating housing mounting hole may be formed on the side, extending in the longitudinal direction, of the insulating housing.
Optionally, the second insulating housing mounting hole may be a half hole, the half hole may communicate with the external along a transverse direction in the cross section of the half hole, and the transverse direction is perpendicular to the longitudinal direction.
Optionally, the second insulating housing mounting hole may be configured to form a through hole with a second insulating housing mounting hole formed in an adjacent card edge connector with pressure mount to share a same connecting member.
Optionally, an insulating housing recess and a second lug may be arranged on the side, extending in the longitudinal direction, of the insulating housing; the second lug, adjacent to the mounting surface, may extend outward in the transverse direction from the interior of the insulating housing recess; and the second insulating housing mounting hole may be formed in the second lug, wherein the transverse direction is perpendicular to the longitudinal direction.
Optionally, the member may comprise a cover plate; the cover plate may cover the mating surface; and a slot may be formed in the cover plate.
Optionally, a flange, extending toward the mounting surface, may be arranged at the side edge of the cover plate and abut against the side surface of the insulating housing.
Optionally, the cover plate and the flange may be sized to provide the desired signal integrity and the desired robustness.
Optionally, a tower may be arranged at an end, in a longitudinal direction, of the insulating housing; a tower opening may be further formed in an end of the cover plate; and the tower may extend through the tower opening.
Optionally, the cover plate may comprise a first sub-cover plate and a second sub-cover plate; and the first sub-cover plate and the second sub-cover plate may be spaced apart from each other to form the tower opening and the slot.
Optionally, the cover plate may further comprise an end plate; the end plate may connect the first sub-cover plate and the second sub-cover plate on the outer side, in the longitudinal direction, of the tower; and the first stiffener mounting hole may be formed in the end plate.
Optionally, the end plate may be closer to the mounting surface rather than the mating surface.
Optionally, the insulating housing may be of an elongated structure; and a second stiffener mounting hole may be formed on the side, extending in the longitudinal direction, of the member.
Optionally, the second stiffener mounting hole may be a half hole, the half hole may communicate with the external along a transverse direction in a cross section of the half hole, and the transverse direction is perpendicular to the longitudinal direction.
Optionally, the second stiffener mounting hole may be configured to form a through hole with a second stiffener mounting hole formed in a member of an adjacent card edge connector with pressure mount to share a same connecting member.
Optionally, a stiffener recess may be arranged on the side, extending in the longitudinal direction, of the insulating housing; a hole seat adjacent to the mounting surface may be formed inside the stiffener recess; and the second stiffener mounting hole may be formed in the hole seat.
Optionally, the member may be provided with a stiffener mounting hole aligning with the insulating housing mounting hole formed in the insulating housing.
Optionally, the member may be made of metal and used for grounding.
Optionally, the thickness of the mounting end may be smaller than that of the mating end.
Optionally, an intermediate portion may be arranged between the mounting end and the mating end; and the thickness of the intermediate portion may be larger than that of the mounting end.
Optionally, the intermediate portion may be arranged between the mounting end and the mating end and may be fixed in the insulating housing; the mating end may comprise a V-shaped portion and a U-shaped portion; one end of the V-shaped portion may be connected to the intermediate portion and the other end may be connected to an end of the U-shaped portion at the inner side of the intermediate portion; and a bend of the U-shaped portion may form a contact region.
Optionally, the mounting end may obliquely extend toward an outer side of the insulating housing.
Optionally, a tip may be connected to the end of the mating end and may be limited in a mounting groove for the corresponding conductive element having the tip thereon.
Optionally, the tip may be configured to be short enough that a distance between a contact region of the mating end bent in the card slot and an opening of the card slot is smaller than a preset distance.
Some embodiments relate to an electronic system. The electronic system may comprise a circuit board and a card edge connector with pressure mount, wherein the card edge connector with pressure mount may comprise an insulating housing, a mounting surface of which may be connected to a front side of the circuit board; and a plurality of conductive elements held in the insulating housing, each of the plurality of conductive elements may have a mounting end, the mounting end may extend out of the mounting surface and may be used for pressure mount to a contact pad on the circuit board.
Optionally, the card edge connector with pressure mount may further comprise a member fixed on the circuit board, the insulating housing being clamped between the member and the circuit board.
Optionally, the electronic system may further comprise a circuit board stiffener fixed to the card edge connector with pressure mount, the circuit board being clamped between the card edge connector with pressure mount and the circuit board stiffener.
These techniques may be used alone or in any suitable combination. The foregoing summary is provided by way of illustration and is not intended to be limiting.
The accompanying drawings may not be drawn to scale. In the drawings, each identical or nearly identical component that is illustrated in various figures may be represented by a like numeral. For purposes of clarity, not every component may be labeled in every drawing. In the drawings:
The above accompanying drawings include the following reference numerals:
card edge connector 100; reinforcing member 200; opening 201; transverse part 210; first longitudinal part 221; second longitudinal part 222; elastic part 230; first extension part 251; second extension part 252; first arc transition part 261; second arc transition part 262; first protrusion part 271; second protrusion part 272; third protrusion part 273; insulating housings 300, 300″; mating surface 301; mounting surface 302; side portion 310; first side portion 311; second side portion 312; tower 320; card slot 330; card inserting groove 331; card locking groove 332; separating rib 333; insulating housing mounting hole 340; first insulating housing mounting hole 341; second insulating housing mounting holes 342, 342″; insulating housing recess 350; first lug 361; second lug 362; latch 370; edge 371; slot 390; first step 391; second step 392; first recess 393; second recess 394; third recess 395; mounting groove 396; conductive element 400; mating end 410; V-shaped portion 411; U-shaped portion 412; contact region 413; mounting end 420; intermediate portion 430; tip 440; member 500; slot 510; cover plate 520; first sub-cover plate 521; second sub-cover plate 522; end plate 523; flange 530; tower opening 540; stiffener mounting hole 550; first stiffener mounting hole 551; second stiffener mounting hole 552; stiffener recess 560; hole seat 561; shell reinforcing separating rib 570; bolt 610; nut 620; electronic systems 700, 700′; circuit board 800; contact pad 810; circuit board mounting hole 820; circuit board stiffener 830; circuit board stiffener mounting hole 840; electronic card 900; and golden finger 910.
The Inventors have recognized and appreciated connector designs that may enable improved performance of computer systems that use high data rate buses to connect components to add-in-cards, such as memory cards. These connector designs may enable connectors that are field installable. Connectors manufactured according to these designs may synergistically support higher frequency connector operation, satisfy the physical requirements set by industry standards such as DDR5, and meet requirements for mass manufacturing, including cost, time and reliability.
Conventionally, unpopulated connectors are pre-installed on a computer motherboard in factories by, for example, soldering, so that additional cards may be added to the motherboard at a later time. The conductive elements of the unpopulated connector that are interconnected to signal paths on the motherboard can act as an unterminated stub. An unterminated stub can impact the signal integrity (SI) and electromagnetic interference (EMI) performance of the system. For example, a computer may be designed with a memory bus that transfers data between a processor and memories. Sockets may be attached to the bus at the time the computer is manufactured. Subsequently, if it is desired to add memory to the computer, memories on add-in-cards may be inserted into the sockets. If some sockets are not populated with add-in memory cards, a performance problem may arise. A conductive element of an unpopulated socket designed to receive a DDR5 memory card, for example, has a mating contact portion that extends a few mm (e.g., 6 mm) in length, which may cause stub resonance within the frequency range of high speed signals on the memory bus to which that socket is connected. Such undesirable electromagnetic characteristics in the operating frequency range of the memory bus may create a particular high risk of interfering with operation of the memory bus.
Aspects of the present disclosure provide high performance, high speed electrical connectors that can be installed in the field by users, which may replace pre-installed unpopulated connectors. Such a connector may include conductive elements configured for pressure mount to a printed circuit board, which may require no additional materials and/or special tools that may be found in factories but not usually possessed by users.
A housing may hold the conductive elements. The housing may have a mating surface, a mounting surface opposite the mating surface in a vertical direction, and a slot extending through the mating surface and elongated in a longitudinal direction perpendicular to the vertical direction. A pair of towers extending in the vertical direction may be disposed on opposite sides of the slot, which may extend into the towers. A pair of latches may be disposed in respective ones of the pair of towers and configured to pivot between a locked position for securing a card in the slot and an unlocked position for ejecting the card out of the slot.
The conductive elements may be disposed in rows on opposite sides of the slot. Each conductive element may include a mating end, a mounting end, and an intermediate portion joining the mating end and the mounting end. The mating end may include a curved portion extending into the slot so as to mate with a card inserted into the slot. The mounting end may extend out of the mounting surface at an angle to the vertical direction, which may change depending on the state of the conductive element. The conductive element may move from a rest state to a compressed state when making contact with a contact pad of a printed circuit board that the connector is mounted to. The angle may increase when the conductive element moves from the rest state to the compressed state, which may provide force for a sufficient contact between a contact surface of the conductive element and the contact pad.
The conductive elements may be configured to balance a tradeoff between a desired compression force and signal integrity performance. For each conductive element, the mounting end may be thinner and/or narrower than the intermediate portion, which may reduce the compression force. The mounting end may have a plating layer at least at selected locations such as the contact surface. The plating layer may include one or more of gold, tin, and any other suitable material, which may reduce a contact resistance between the contact surface of the conductive element and the contact pad and therefore improve signal integrity.
The housing may be configured to provide the compression force to the conductive element when the housing is secured to the printed circuit board that the connector is mounted to. The housing may have one or more mounting holes disposed at selected locations, which may be configured to align with respective holes of the printed circuit board. A connecting member such as a bolt may extend through the aligned holes so as to hold the housing to the printed circuit board. In some embodiments, the housing may include mounting holes disposed outside the pair of towers in the longitudinal direction. In some embodiments, the housing may include one or more holes disposed between the pair of towers. Some of the holes may be shaped to coordinate with holes of an adjacent connector such that the adjacent connectors may share a connecting member.
The inventors have recognized and appreciated that the housing may be subject to warpage when the housing is secured to the printed circuit board by a user. The connector may include a member configured to reduce the risk of housing warpage. The member may be made of a material that has higher strength such as metal, ceramic, or any other suitable materials. The member may be at least partially disposed on the mating surface of the housing and have a slot aligned with the slot of the housing so that a card can go through the slot of the member and be inserted into the slot of the housing. The member may include side portions extending perpendicular to the mating surface and along the sides of the housing.
The member and the conductive elements may be configured coordinatively so as to provide both desired mechanical strength and desired signal integrity. In some embodiments, the conductive element may be configured to be shorter in the vertical direction, which may shorten signal paths and therefore improve signal integrity. In some embodiments, the mating end of each conductive elements may include first and second curved portions. The first curved portion may join the second curved portion and the intermediate portion. The second curved portion may extend into the slot to provide a mating contact region. Such a configuration may move the mating contact region closer to the mating surface of the housing so as to compensate a mating distance in the vertical direction added by a thickness of the member. Shorter conductive elements may enable the member to have a desired thickness in the vertical direction, which may improve mechanical strength. Such a configuration may also enable the overall height of the connector including the member to satisfy standard requirement.
As shown in
In some embodiments, the insulating housing 300 may be elongated. The insulating housing 300 may extend in the longitudinal direction X-X. The card slot 330 may be in elongated in the longitudinal direction X-X. The electronic card 900 may be inserted into the card slot 330. The mounting surface 302 may be connected to a circuit board 800 serving as a mainboard, and the electronic card 900 may be electrically connected to a circuit board 800 through the card edge connector 100. Therefore, circuits on the electronic card 900 and circuits on the circuit board 800 may be interconnected. In some embodiments, a plurality of conductive elements 400 may be held in the insulating housing 300. The plurality of conductive elements 400 may be arranged in the longitudinal direction X-X and spaced apart from each other in the insulating housing 300, so as to ensure electrical insulation between adjacent conductive elements 400. The plurality of conductive elements 400 may be distributed on both sides of the card slot 330. The electronic card 900 may have a plurality of golden fingers 910. As shown in
The mounting end 420 of each conductive element 400 of the card edge connector 100 can be in pressure mount to the contact pad 810 on the circuit board 800 in any suitable method. In some embodiments, the card edge connector 100 may be provided with any other suitable connecting structure and may be connected to the circuit board 800 through such connecting structure. In some embodiments, such connecting structure includes one or more of a snap joint and a threaded connecting member, which is convenient for the user to install the card edge connector 100 independently in field. After the card edge connector 100 is connected to the circuit board 800 in place, the mounting end 420 of each conductive element 400 may undergo certain elastic deformation. Therefore, shown as
Directional terms used herein are with respect to the placed state of the card edge connector 100 in
Conventionally, conductive elements of a card edge connector are soldered to a circuit board in the factory. According to aspects of the present disclosure, the conductive elements 400 of the card edge connector 100 may be separated from the circuit board 800 in lieu of being soldered onto the circuit board in the factory. In this way, the card edge connector 100 may provide simplified manufacturing procedures, shortened manufacturing period, lowered manufacturing cost, and improved market competitiveness. When a user needs to use the card edge connector 100, the mounting ends 420 may be pressure mount onto the contact pad 810 on the circuit board 800 by the user in field. Such a configuration may enable expanding capabilities of an electronic system by installing additional cards without pre-installing unpopulated card edge connectors. Conductive elements of a pre-installed, unpopulated connector may act as an unterminated stub, which can impact signal integrity. Also, a new card edge connector 100 may be changed onto the circuit boards 800 by the user if needed, for example, to replace a broken connector. Such a configuration may provide higher practicability.
Some embodiments of the present disclosure further provide an electronic system. The electronic system may include a circuit board and a card edge connector according to any one of the embodiments of the present disclosure. In an embodiment, as shown in
As shown in
The insulating housing 300 may further include a tower 320. The tower 320 may be located at the end, in the longitudinal direction X-X, of the insulating housing 300. In some embodiments, the tower 320 may be connected to the end of the side portions 310. There may be a pair of towers 320. The pair of towers 320 may be connected to the two ends of a pair of the side portions 310 respectively. The towers 320 may extend in the vertical direction Z-Z and is higher than the side portions 310. The two ends of the card slot 330 may extend into the pair of the towers 320 respectively. That is to say, in the longitudinal direction X-X, a length of the card slot 330 may be larger than that of the side portion 310, so that the two ends of the card slot 330 may extend beyond the side portions 310 and extend into the towers 320. The mating surface 301 may be formed by the side portions 310 and the towers 320; and the mounting surface 302 may similarly be formed by the side portion 310 and the tower 320.
As shown in
In the illustrated example, the card slot 330 extends into the towers 320, which affects the strength of the towers 320. The towers 320 can be strengthened by providing the reinforcing members 200 in the towers 320, so as to improve their impact resistance. A longitudinal length of the entire card slot 330 may be greater than a transverse width. The towers 320 may deform or crack when subjected to an impact force in the transverse direction Y-Y. Therefore, further, the ends of the card slot 330 extend into the opening 201 of the U-shaped reinforcing member 200. In this way, when the electronic card 900 is inserted into the card slot 330, the reinforcing members 200 can maintain the shape of the towers 320 at the sides of the electronic card in the transverse direction Y-Y, so as to reduce the risk of deformation or cracking of the towers 320 when the electronic card 900 is impacted by an external force. In addition, since the vertical height of the towers 320 may be greater than the vertical height of the side portions 310, the increased strength of the towers 320 can effectively share the impact force on the side portions 310, and also strengthen the pair of side portions 310, thereby improving their impact resistances. In particular, the resistance to the impact force in the transverse direction Y-Y can be improved, thereby protecting the insulating housing 300 to a certain extent and preventing the insulating housing 300 from deforming or cracking.
The reinforcing member 200 may be inserted into the insertion slot 390 in any suitable direction, such as the longitudinal direction X-X (not shown) or the vertical direction Z-Z (as shown). Under situations that the reinforcing member 200 is installed into the tower 320 in different directions, the insertion slot 390 may have different shapes and structures. When the reinforcing member 200 is inserted into the insertion slot 390 in the longitudinal direction X-X, the insertion slot 390 may extend to the outer side surface of the tower 320 in the longitudinal direction X-X. In this way, the reinforcing member 200 may be inserted into the insertion slot 390 from the outer side surface. When the reinforcing member 200 is inserted into the insertion slot 390 in the vertical direction Z-Z, the insertion slot 390 may extend to the mating surface 301 or the mounting surface 302 of the tower 320 in the vertical direction Z-Z. In this way, the reinforcing member 200 may be inserted into the insertion slot 390 from the mating surface 301 or the mounting surface 302.
The reinforcing member 200 may be made of a high-strength material, such as plastic, ceramic, metal and so on. In some embodiments, the reinforcing member 200 is made of metal. The metal material has higher strength, and lower material cost and processing cost. In some embodiments, the reinforcing member 200 is an integral sheet metal piece. In this way, the reinforcing member 200 has higher strength, accompanied with simpler processing technology and lower cost. The insulating housing 300 and the reinforcing member 200 are made of different materials. The reinforcing member 200 is inserted into the insertion slot 390. The insulating housing 300 and the reinforcing member 200 can be separately manufactured and then assembled, thereby facilitating manufacturing and installation, and reducing the cost of the electrical connector 100.
Optionally, the reinforcing member 200 may be installed in the tower 320 in a non-plugging manner, and instead may be sealed in the insulating housing 300 while the insulating housing 300 is molded. However, this may result in higher cost of molds for producing the insulating housing 300.
Optionally, the insertion slot 390 extends to the mating surface 301 of the tower 320. The reinforcing member 200 is inserted into the insertion slot 390 from the mating surface 301. During the assembling of the conductive elements 400 and the reinforcing member 200 to the insulating housing 300, the insulating housing 300 may be conveyed along the longitudinal direction X-X to insertion modules of the assembling apparatus. The modules for inserting the conductive elements 400 and the reinforcing member 200 may be located below and above the insulating housing 300, respectively, and the conductive element 400 may be inserted from the mounting surface 302 and the reinforcing member 200 may be inserted into the insulating housing 300 from the mating surface 301. The electrical connector 100 in this configuration can make the layout of the assembling apparatus more reasonable, and the cooperation between the various modules is more efficient.
In some embodiments, as shown in
Optionally, the depth of the third recess 395 may be greater than the depth of the first recess 393 and the depth of the second recess 394. In this way, an insertion depth of a main portion of the reinforcing member 200 can be increased, which is beneficial to increase the vertical height of the opening 201, ensure the interference force of the reinforcing member 200, and protect the towers 320 to a larger extent from deforming or cracking.
Optionally, the depth of the third recess 395 may be less than or equal to the depth of the first recess 393 and the depth of the second recess 394.
In some embodiments, as shown in
Optionally, the reinforcing member 200 may further include a first extension part 251 and a second extension part 252. The first extension part 251 and the second extension part 252 extend upward from the first longitudinal part 221 and the second longitudinal part 222, respectively. The first extension part 251 and the second extension part 252 may be same or different. In an exemplary embodiment, the first extension part 251 and the first longitudinal part 221, as well as the second extension part 252 and the second longitudinal part 222 may be spliced together by means of, for example, welding, bonding, etc., or may be integrally formed. The first extension part 251 and the second extension part 252 can increase a vertical size of the reinforcing member 200 as much as possible so as to enhance the resistance of the reinforcing member 200 to an impact force, so that the insulating housing 300 can be better protected from deforming or cracking.
Optionally, the transverse part 210 and the first longitudinal part 221 may be connected by a first arc transition part 261. The transverse part 210 and the second longitudinal part 222 may be connected by a second arc transition part 262. A curvature radius of the first arc transition part 261 and a curvature radius of the second arc transition part 262 may be arbitrary. In this way, the reinforcing member 200 is easily processed and formed from a plate, and the production cost thereof is relatively lower.
In the illustrated embodiment, as shown in
In some embodiments, as shown in
In some embodiments, an insulating housing mounting hole(s) 340 may be formed in the insulating housing 300, as shown in
The insulating housing mounting hole 340 may include a first insulating housing mounting hole 341 and/or a second insulating housing mounting hole 342. The first insulating housing mounting hole 341 may be formed at the outer side of the tower 320 in the longitudinal direction X-X. Optionally, a first insulating housing mounting hole 341 may be formed in the outer side of one tower 320 only; or two first insulating housing mounting holes 341 may be formed in the outer sides of the two towers 320 respectively. In some embodiments, the first insulating housing mounting holes 341 may be formed in the outer sides of the two towers 320 and may be located at two ends, in the longitudinal direction X-X, of the insulating housing 300. The second insulating housing mounting hole 342 may be formed in the middle of the insulating housing 300 in the longitudinal direction X-X. The middle includes, but not limited to, the right center. For example, it may offset by a certain distance in the longitudinal direction X-X and/or the transverse direction Y-Y. In some embodiments, the second insulating housing mounting hole 342 may be formed in a separating rib 333. The position, at which the separating rib 333 is located, may not be provided with any conductive element; and the portion of the insulating housing 300 having the separating rib 333 may be relatively higher in strength. It may reduce the size of the insulating housing 300 and may further have no effect on the mechanical strength of the insulating housing 300 basically by providing the second insulating housing mounting hole 342 in the separating rib 333. In some embodiments, both the first insulating housing mounting hole 341 and the second insulating housing mounting hole 342 may be provided. In this way, the pressure, facing the circuit board 800, may be applied to the insulating housing 300 at the end and the middle of the insulating housing 300 respectively, so that the plurality of mounting ends 420 distributed in the longitudinal direction X-X may pressure mount to the contact pads 810 on the circuit board 800 uniformly. The warpage of the insulating housing 300 and/or the circuit board 800 due to the pressure may be alleviated. The uniform pressure mount between the plurality of mounting ends 420 and the contact pads 810 on the circuit board 800 may ensure consistent contact areas between the plurality of mounting ends 420 and the contact pads 810, and then contact impedance may be uniform among the plurality of mounting ends 420. Therefore, balanced impedance can be maintained between different signal conductors, and the stability of signal transmission is ensured.
In some embodiments, as shown
In some embodiments, as shown in
In some embodiments, as shown in
In some embodiments, the second insulating housing mounting hole 342 may be a half hole. In a cross section of the half hole, the half hole may communicate with the external in the transverse direction Y-Y. The cross section of the half hole refers to a cross section perpendicular to the vertical direction Z-Z. In some embodiments, the cross section of the half hole may be in a shape of semicircle. The straight edge of the semicircle may face the external. The half hole may communicate with the external through one side, on which the straight edge is located. In other embodiments (not shown), the half hole may also be in any suitable shape. The shape of the half hole may depend on the shape and the structure of the connecting member used. As the electronic system becomes more and more compact and the intensive degree becomes higher and higher, the size of the insulating housing 300 in the transverse direction Y-Y may be very limited. Such a configuration may enable the half hole to have a relatively larger diameter in a limited space, such that a relatively larger connecting member may be used to connect the card edge connector having the insulating housing 300 to the circuit board. It may lower the difficulty of the connecting operation. Moreover, it may enable the second insulating housing mounting holes 342 formed in the two adjacent insulating housings 300 to form a through hole.
As the electronic system becomes more and more compact, and the intensive degree becomes higher and higher, a plurality of card edge connectors may be connected to one circuit board in the transverse direction Y-Y one by one, that is, two adjacent card edge connectors may be disposed very close to each other, with reference to
In some embodiments, the side, extending in the longitudinal direction X-X, of the insulating housing 300 may be provided with an insulating housing recess 350 and a second lug 362, referring back to
In some embodiments, as shown
In some embodiments, as shown in
In embodiments where the card slot 330 is internally provided with the separating rib 333, the slot 510 may be internally provided with a shell reinforcing separating rib 570. The shell reinforcing separating rib 570 may be aligned with the separating rib 333. The shell reinforcing separating rib 570 may divide the slot 510 into a plurality of independent sections. The shell reinforcing separating rib 570 may improve the mechanical strength of the member 500 and may further have a fool-proof function by arranging the shell reinforcing separating rib 570 at the decentered position of the slot 510.
The member 500 may be made of a material with relatively larger strength, for example, plastics, ceramics, a metal and the like. In some embodiments, the member 500 is an integral sheet metal part. Therefore, the member 500 is relatively higher in strength, simpler in processing process and relatively lower in cost.
By arranging the member 500, the warpage of the insulating housing 300 due to the pressures between the mounting ends 420 and the circuit board 800 may be reduced. In some embodiments, if the structure strength of the insulating housing 300 is high enough, there may be no need for arranging the member 500.
In the electronic system 700, the member 500 may be fixed on the circuit board 800. The insulating housing 300 may be clamped between the member 500 and the circuit board 800. In some embodiments, the bolt 610 may penetrate through the member 500. Therefore, the connecting members, such as the bolt 610 and the nut 620, may be used for clamping the member 500, the insulating housing 300 and the circuit board 800 to achieve pressure mount of the mounting ends 420 to the contact pads 810 on the circuit board 800. It should be noted that in the case of arranging the member 500, there may be no insulating housing mounting hole 340 in the insulating housing 300. The connecting members, such as the bolt 610 and the nut 620, may connect the member 500 to the circuit board 800 together to clamp the insulating housing 300.
In some embodiments, the electronic system 700 may include a circuit board stiffener 830. The circuit board stiffener 830 may be fixed to the card edge connector 100. The circuit board 800 may be clamped between the card edge connector 100 and the circuit board stiffener 830. In some embodiments, a circuit board stiffener mounting hole 840 may be formed in the circuit board stiffener 830. The circuit board stiffener mounting hole 840 may be aligned with the insulating housing mounting hole 340. The bolt 610 may extend through the insulating housing mounting hole 340, the circuit board mounting hole 820 and the circuit board stiffener mounting hole 840, and be connected to the nut 620. Therefore, the connecting members, such as the bolt 610 and the nut 620, may be used for clamping the insulating housing 300, the circuit board 800 and the circuit board stiffener 830 to achieve pressure mount of the mounting ends 420 to the contact pads 810 on the circuit board 800. It should be noted that in the case of arranging the member 500 without any insulating housing mounting hole 340 in the insulating housing 300, the connecting members, such as the bolt 610 and the nut 620, may connect the member 500, the circuit board 800 and the circuit board stiffener 830 together to clamp the insulating housing 300.
The circuit board stiffener 830 may be made of the material with relatively larger strength, for example, the plastics, the ceramics, the metal and the like. In some embodiments, the circuit board stiffener 830 is an integral sheet metal part. Therefore, the circuit board stiffener 830 is relatively higher in strength, simpler in processing process and relatively lower in cost.
Arranging the circuit board stiffener 830 may reduce the risk of the warpage of the circuit board 800 due to the pressures between the mounting ends 420 and the circuit board 800. In some embodiments, if the structure strength of the circuit board 800 is high enough, there may be no need for arranging the circuit board stiffener 830.
In some embodiments, the member 500 may include a cover plate 520. The cover plate 520 may cover the mating surface 301. The slot 510 may be formed in the cover plate 520. Therefore, force afforded by the insulating housing 300 may be more uniform, which makes the insulating housing 300 durable. Additionally, the cover plate 520 may serve as a protective cap, blocking ingress of dust, moisture, etc. from entering the insulating housing 300 through the mating surface 301.
In some embodiments, a flange 530, extending toward the mounting surface 302, may be arranged at the side edge of the cover plate 520. The flange 530 may abut against the side surface of the insulating housing 300. With reference to
In some embodiments, depending on required signal integrity and the member material, the member 500 may be grounded or not. In some embodiments, the member 500 may be made of metal, which may deteriorate the signal integrity performance if float. Then connecting the stiffener to ground may improve the signal integrity performance. In some embodiments, the member 500 may be made of a different material and/or have a better structure. For example, the member 500 may be made of a high-strength non-metallic material, the member 500 may be not necessary to be grounded.
In some embodiments, the cover plate 520 and the flange 530 may be sized to provide the desired signal integrity and the desired robustness. In some embodiments, the size of the cover plate 520 may include a width W1 and a thickness L1, and the size of the flange 530 may include a width W2 and a thickness L2. The above sizes may be adjusted according to the desired signal integrity and the desired robustness, so as to meet the user demand. In some embodiments, when better robustness is required, the sizes of the cover plate 520 and the flange 530 may be increased, so that the member 500 may have higher mechanical strength; and when better signal integrity is required, the sizes of the cover plate 520 and the flange 530 may be reduced.
In some embodiments, a tower opening 540 may be formed in an end of the cover plate 520. The tower opening 540 may communicate with the slot 510. The tower opening 540 may be in correspondence to the tower 320. The tower 320 may extend through the tower opening 540. The flange 530 may extend to the side surface of the tower 320. Therefore, the flange 530 may further have the effect of protection on the side surface of the tower 320, so as to prevent the insulating housing 300 from deforming or cracking.
In some embodiments, a stiffener mounting hole 550 may be formed in the member 500. The stiffener mounting hole 550 may be aligned with the insulating housing mounting hole 340 formed in the insulating housing 300. Therefore, the bolt 610 may extend through the stiffener mounting hole 550 and the insulating housing mounting hole 340, and then be connected to the nut 620.
In some embodiments, as shown in
In some embodiments, as shown in
In some embodiments, the end plate 523 may be closer to the mounting surface 302 than the mating surface 301. Such a configuration may reduce a length of the bolt 610 and therefore lower the cost. Also, the stability of connection between the bolt 610 and the nut 620 may be improved.
In some embodiments, the insulating housing 300 may be of an elongated structure. The stiffener mounting hole 550 may include second stiffener mounting holes 552; and the second stiffener mounting holes 552 may be formed on the sides, extending in the longitudinal direction X-X, of the member 500. In some embodiments, the second stiffener mounting holes 552 may be aligned with the second insulating housing mounting holes 342 (if provided). Accordingly, for example, the connecting members such as the bolts 610 may penetrate through the second stiffener mounting holes 552 and the second insulating housing mounting holes 342 and then be connected to the nuts 620, or may be directly in threaded connection with the second stiffener mounting holes 552 and the second insulating housing mounting holes 342. With such arrangement, pressure may be applied to the insulating housing 300 from a plurality of positions, so as to prevent the warpage of the insulating housing 300 and/or the circuit board 800.
In some embodiments, each of the second stiffener mounting holes 552 may be half hole. In a cross section of the half hole, the half hole communicates in the transverse direction Y-Y with the external. The cross section of the half hole refers to a cross section perpendicular to the vertical direction Z-Z. In some embodiments, the cross section of the half hole may be in a semicircular shape. The straight edge of the semicircle may face the outside. The half hole may communicate with the external through one side, on which the straight edge is located. In other embodiments (not shown), the half hole may further be in any other shape; and the shape of the half hole may depend on the shape and the structure of the used connecting member. Similar to the beneficial effects of employing a half hole as the second insulating housing mounting hole 342, the half hole with relatively larger diameter may be arranged in a limited space of the member 500, and then a relatively larger connecting member may be used to connect the card edge connector having the member 500 to the circuit board, so as to lower the difficulty of a connecting operation. Moreover, it possibly provides a condition for the second stiffener mounting holes 552 formed in the two adjacent members 500 to form a through hole.
In some embodiments, the second stiffener mounting hole 552 may be configured to form a through hole with a second stiffener mounting hole 552 formed in a member 500 of an adjacent card edge connector 100 to share a same connecting member. As the electronic system becomes more and more compact and the intensive degree becomes higher and higher, a plurality of card edge connectors with pressure mount are connected to one circuit board in the transverse direction Y-Y one by one, that is, two adjacent card edge connectors with pressure mount may be disposed very close to each other, with reference to
In some embodiments, a stiffener recess 560 may be arranged on the side, extending in the longitudinal direction X-X, of the insulating housing 300. A hole seat 561, adjacent to the mounting surface 302, may be formed inside the stiffener recess 560. The second stiffener mounting hole 552 may be formed in the hole seat 561. With such arrangement, the member 500 may be simple and concise in structure and low in manufacturing cost.
Examples of the conductive elements 400 are described in detail below.
As shown in
In some embodiments, the intermediate portion 430 may be fixed to the insulating housing 300 through clamping or any other suitable manner. The mating end 410 may include a V-shaped portion 411 and a U-shaped portion 412. One end of the V-shaped portion 411 may be connected to the intermediate portion 430. The central part of the V-shaped portion 411 may protrude toward the card slot 330. The other end of the V-shaped portion 411 may be connected to an end of the U-shaped portion 412 at the inner side of the intermediate portion 430. A bend of the U-shaped portion 412 may be located in the card slot 330. The bend of the U-shaped portion 412 may form the corresponding contact region 413. The contact region 413 may be used for electrically contact the golden finger 910 of the electronic card 900. Such a configuration may enable a smaller friction force between the conductive element 400 and the electronic card 900, so that abrasion on both of the conductive element 400 and the electronic card 900 are small in use, and then the service lives thereof are prolonged.
In some embodiments, the mounting end 420 may obliquely extend toward an outer side of the insulating housing 300. Such a configuration may enable, when the mounting end 420 presses on the corresponding contact pad 810, a larger contact area between the mounting end 420 and the contact pad 810, so that the connection reliability is ensured, and the impedance is lowered. Also, the intensity of pressure may further be weakened, and damages are prevented.
In some embodiments, a tip 440 may be connected to the end of the mating end 410. The tip 440 may be limited in the mounting groove 396 for the conductive element 400 with this the tip 440. In some embodiments, the tip 440 may be hooked on the wall of the corresponding mounting groove 396. Therefore, a fixing between the conductive element 400 and the insulating housing 300 is relatively simpler and more concise in structure and is lower in manufacturing cost. Also, the conductive element 400 and the insulating housing 300 are convenient to be mounted together, so that the assembling difficulty of the production may be reduced.
In some embodiments, the mating end 410 may have the contact region 413 bending into the card slot 330, with reference to
The present disclosure has been described through the above embodiments, but it should be understood that a variety of variations, modifications and improvements may be made by a person skilled in the art according to the teaching of the present disclosure, and these variations, modifications and improvements all fall within the spirit of the present disclosure and the claimed scope of protection of the present disclosure. The scope of protection of the present disclosure is defined by the appended claims and its equivalent scope. The above embodiments are only for the purpose of illustration and description, and are not intended to limit the present disclosure to the scope of the described embodiments.
Moreover, although many creative aspects have been described above with reference to the vertical connector, it should be understood that the aspects of the present disclosure are not limited to these. Any one of the creative features, whether alone or combined with one or more other creative features, can also be used for other types of card edge connectors, such as right-angle connectors and coplanar connectors, and the like.
In the description of the present disclosure, it is to be understood that orientation or positional relationships indicated by orientation words “front’, “rear”, “upper”, “lower”, “left”, “right”, “transverse direction”, “vertical direction”, “perpendicular”, “horizontal”, “top”, “bottom” and the like usually are shown based on the accompanying drawings, only for the purposes of the ease in describing the present disclosure and simplification of its descriptions. Unless stated to the contrary, these orientation words do not indicate or imply that the specified apparatus or element has to be specifically located, and structured and operated in a specific direction, and therefore, should not be understood as limitations to the present disclosure. The orientation words “inside” and “outside” refer to the inside and outside relative to the contour of each component itself.
For facilitating description, the spatial relative terms such as “on”, “above”, “on an upper surface of” and “upper” may be used here to describe a spatial position relationship between one or more components or features and other components or features shown in the accompanying drawings. It should be understood that the spatial relative terms not only include the orientations of the components shown in the accompanying drawings, but also include any suitable orientations in use or operation. For example, if the component in the accompanying drawings is turned upside down completely, the component “above other components or features” or “on other components or features” will include the case where the component is “below other components or features” or “under other components or features”. Thus, the exemplary term “above” can encompass both the orientations of “above” and “below”. In addition, these components or features may be otherwise oriented (for example rotated by 90 degrees or other angles) and the present disclosure is intended to include all these cases.
It should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, an expression of a singular form includes an expression of a plural form unless otherwise indicated. In addition, it should also be understood that when the terms “including” and/or “comprising” are used herein, it indicates the presence of features, steps, operations, parts, components and/or combinations thereof.
It should be noted that the terms “first”, “second” and the like in the description and claims, as well as the above accompanying drawings, of the present disclosure are used to distinguish similar objects, but not necessarily used to describe a specific order or precedence order. It should be understood that ordinal numbers used in this way can be interchanged as appropriate, so that the embodiments of the present disclosure described herein can be implemented in a sequence other than those illustrated or described herein.
Number | Date | Country | Kind |
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202210097418.3 | Jan 2022 | CN | national |
202220224390.0 | Jan 2022 | CN | national |