CN1310493A - Side plugging card socket for circuit board - Google Patents

Abstract

Edge card connector for meeting a circuit card. The connector has a connector edge and a group of connecting terminals adjacent to the connector edge. The plug seat includes an elongated housing, on which a elongated notch is for inserting circuit card, and a reed fixing container is closed to notch. Each reed includes a contacting part protruding to the notch for connecting the connecting terminals on the circuit card. A retaining part with retaining edge is embeded into the inner surface of the respective fixing container. A tail part protrudes the outer housing and forming an angle with elongated notch for inserting into an outer jack. A main body part is arranged between the contacting part and tail part. The main body part has a flank width which is larger than the largest flank width of both the contacting part and retaining part. The main body part has a plane area which is larger than the plane area of both the contacting part and retaining part. Grounding reed and signal reed alternately are arranged along the longitudinal axis direction of the notch, and each grounding reed has a face profile determined by the face profile of the adjacent plain-form signal reed. The signal reeds are in pairs and include a first and second reed. The main body of the first reed has a concave part for receiving the protruding part of the second reed main body part. The plain-form protuberance without mechanical function is added to the main body so as to increase the area of the metal plane.

Description

The side plugging card socket that is used for circuit board

The present invention relates generally to the electrical outlets technology, particularly relate to the side plugging card socket of a kind of high density, two-forty.

A kind of electrical outlets that is widely used in the electrical industry field is called as " side plugging card socket ".Can insert a circuit board in the side plugging card socket, have an edge that patches with socket coupling on the sort circuit plate, and this patch along on post a set of contact electrode.This side plugging card socket has a long strip type shell, have a slot or notch on this shell, be used for inserting the edge that patches of circuit board, one or both sides along notch are arranged with one group of contact spring independent of each other, be used for engaging with patching of the circuit board that is close to insertion along last contact electrode, in majority was used, this side plugging card socket was to be installed on another circuit board.Usually will have the circuit board or the plug-in unit that patch the edge and be called " daughter board ", and the circuit board that side plugging card socket will be housed is commonly referred to " motherboard ".

One of problem with side plugging card socket of above-mentioned feature concentrates in the requirement to the high density electronic circuit that increases day by day.Contact spring in this socket is installed in the shell of being made by plastics or other insulating material.Not only contact spring miniaturization day by day, and their density in shell is also increasing.Contact spring in a row is installed in the notch of jack housing, and these contact springs are separated from each other by the insulating barrier or the wall that are connected in one with shell, and comprises the sidewall around contact spring in the shell.Unfortunately, this highdensity circuit may cause the increase of crosstalking.

For example, the operating frequency of microprocessor is more and more higher, and with such as memory, with wide band system communication, this has just increased the quantity of parallel connection between the auxiliary equipment such as display card.

This high-density circuit finally may run into to make and have relatively little interference sections between the compact arranged contact spring.Yet the demand of high-frequency operation causes low-impedance needs, to adapt to response of digit pulse fast and wide band requirement.But owing to the coupling of electric capacity and inductance between signal and the signal, intensive circuit space may cause the above-mentioned increase of crosstalking and the variation of impedance.In addition, narrow or long sometimes signal path also may cause the increase of crosstalking and the variation of impedance.Therefore, need to improve the electric capacity between contact spring and the reed, and must the signal path of contact spring be shielded.This is by realizing along the grounding reed that uses enlarged-area between the signal contact spring of vertically arranging in the notch of long strip type on the long strip type shell alternately.

Also has the another one problem, it occur in when this side plugging card socket by to be installed on the motherboard with respect to slot or notch certain angle, promptly angled with edge card plug-in unit or " son " plate, this incline structure is used in the limited occasion of packaging density of the socket of straight cutting or vertical orientation usually.In other words, the space of " vertically " direction is required as other purposes on the motherboard.In the socket of an inclination, the length of part contact spring is greater than other contact springs, and causes different signal path lengths.For example, the contact spring of arranging along the socket notch " inboard " of this inclination is lacked than " outside " contact spring of another example arrangement of notch.Because contact spring generally is to be mounted in pairs on the y direction of socket, every pair of contact spring will comprise a short contact reed and a long contact spring, and promptly two contact springs have different signal paths.This causes the unbalanced of a kind of impedance between two contact springs or inductance, because inductance is a function about signal path lengths.

The present invention solves this a series of problem by a kind of improved contact spring structure with improved capacitive coupling performance is provided.

Therefore, an object of the present invention is to provide a kind of brand-new improved side plugging card socket, be used for having a circuit card that patches the edge and being connected with one, and this patch along on one group of connecting terminal is arranged.

In the typical embodiment of the present invention, this socket comprises the shell of a long strip type, has one and be used for inserting the long and narrow notch that circuit card patches the edge on shell, comprising the tight adjacent contact spring installation cavity of arranging along notch.The contact spring of one group of planar shaped is embedded in the contact spring installation cavity.Each contact spring comprises a contact portion that is stretched in the notch, is used for contacting with connecting terminal on the circuit card.Each contact spring comprises a standing part with maintenance fastener, is used for embedding on the inner surface of corresponding contact spring installation cavity; Also comprise a afterbody that stretches out from shell, be used for connecting the conductor of an outside, for example a printed circuit on circuit board with respect to the angled inclination of elongated slots on the shell; A main part is between contact portion and the afterbody.According to characteristics of the present invention, this main part has a transverse width also bigger than the maximum lateral width of contact portion and standing part.

According to another embodiment of the invention, shell be processed to this form-so that the notch that makes the removal circuit card with respect to becoming an acute angle between the circuit board that shell is installed.The main part of one group of first contact spring (as row's " outside " contact spring) has the part of matrix; The main part of one group of second contact spring (as " inboard " one row contact spring) has the part of protrusion, reaches in the part of matrix of first contact spring.

According to another characteristics of the present invention: the main part of each contact spring has one, and promptly the metal flat than contact portion is big, also big metal flat part than the metal flat of standing part, be also bigger better than the metal flat part sum of contact portion and standing part, the grounding reed of a planar shaped is placed between two adjacent signal reeds, and grounding reed has a face profile by the border decision of the face profile of adjacent signal reed.

Also have characteristics, each contact spring to comprise the ledge that stretch out in the opposite direction a main part edge and contact portion side according to the present invention.Two contacts are along the relative both sides that are arranged in ledge, and perpendicular to the notch that patches of plug-in unit, each socket also may comprise a ledge that is stretched out by shell along usually in contact.

During will be discussed in more detail below, other purposes of the present invention, characteristics and advantage be described.

In those characteristics that are considered to create of the present invention claims afterwards set forth in detail is arranged, purpose of the present invention and advantage thereof can well be understood by the description with reference to following accompanying drawing, wherein identical in the accompanying drawings reference numerals components identical, and wherein:

Fig. 1 is the top plan view that comprises a strip side plugging card socket of the principle of the invention;

Fig. 2 is the bottom plan view of socket;

Fig. 3 is the elevation of socket one side;

Fig. 4 is the elevation that right end is amplified among a Fig. 3;

Fig. 5 is the vertical component view by the amplification of socket, and can see a pair of signal reed that is in release condition;

Fig. 6 and Fig. 5 are similar, show a grounding reed that is disposed between a pair of signal reed.

Fig. 7 is the facade sketch map of a pair of signal reed, has shown wherein different signal path lengths.

Fig. 8 and Fig. 7 are similar, have shown the different metallic plate area of the three-dimensional part of contact spring.

With reference to the description of detail drawing, and 1-4 at first with the aid of pictures, present invention resides in the edge card plug-in type electrical outlets of a strip, this socket is represented with 10 usually.This socket is typical such electrical outlets, because it comprises the insulation crust of a moulding integrally, usually represent with 12, on this shell, have an edge card inserting surface 12a (as Fig. 3) and a motherboard stationary plane 12b (as Fig. 4), edge card inserting surface 12a comprises a long strip type slot or plug-in unit notch 14 (as Fig. 1), be used for inserting the edge that patches of an edge card plug-in unit, be close to this place that patches the edge and have one group of connecting terminal.One group of reed (describing hereinafter) is installed in the both sides of notch 14, and the connecting terminal that is used for patching with edge card plug-in unit both sides next-door neighbour the edge contacts, and stretches out at plug-in unit notch 14 two relative ends and a pair ofly stretches out pair of upright part 12C from shell 12.A pair of rib post 16 (as Fig. 1) is across between two relative with shell in notch 14 longitudinal side wall 12d.These rib posts and shell are an integral body, and dual function-also provide except the supporting side walls positioning function to the edge card plug-in unit is provided.

In a lot of the application, side plugging card socket just to socket 10, is to be installed on the second circuit board, promptly passes through the motherboard installed surface 12b of jack housing 12.Removal circuit plate or edge card plug-in unit normally are called " daughter board ", and the circuit board that socket is installed is commonly referred to " motherboard ".Can be clear that in Fig. 4 socket 10 is sockets of an inclination, have certain angle between the face 12a because motherboard installed surface 12b and edge card patch.Therefore, when inserting notch 14, the edge card plug-in unit, and an angle is arranged between the motherboard along the direction of arrow A.The shell of socket comprises that one group of support section 20 is fixed on the surperficial 18a of motherboard socket easily.At last, a pair of release lever 22 is installed among the upstanding portion 12c with the bent axle fraction, is used for easily discharging from patch notch 14 the edge card plug-in unit.

Reach the term that in claims, has used such as " top ", " bottom ", " uprightly ", " inboard ", " outside " or the like here, so that the description in the orientation that is related to socket and reed among the present invention is had a clear and simple and clear understanding.Perhaps, this is understandable.Yet these terms do not mean to do any restriction, because this socket almost is omnibearingly to use.

Alternately arrange along the y direction that patches notch 14 referring to Fig. 5 and 6 one groups of signal reed installation cavitys 24 and winding ground reed installation cavity 26.A pair of signal reed is typically expressed as 28 and 30, is installed in each installation cavity 24 (as Fig. 5) along the direction shown in the arrow " B "; And a grounding reed is typically expressed as 32, be installed in each installation cavity 26 (as Fig. 6) along direction shown in the arrow " C ", in addition, grounding reed 32 by the length direction along notch 14 alternately be placed on adjacent signal reed between, particularly referring to Fig. 5, each signal reed 28 and 30 is by the die-cut planar shaped reed that comes out of sheet metal material, each reed comprises a contact portion 34 that is the contact arm shape, be equipped with an arc contact point 34a at the contact arm lean-with and reach in the notch 14, be used for be inserted into notch in a side of edge card plug-in unit or the connecting terminal on the opposite side contact.Each signal contact spring comprises a maintenance part that resembles a pair of retention arm 36, has the maintenance edge on it, is used for embedding the inner surface of the sidewall 12d of shell, and relative with the dividing plate 38 of separating each chamber 24.The contact portion 34 of each signal reed 28 and maintenance part 36 are side next-door neighbour's the contact portion 34 of signal reed 30 and the mirror image of maintenance part 36, each signal reed comprises one after maintenance part 36 and main part 40, reach afterbody 42 outside the shell with one by main part, be used for being inserted in the special jack on the motherboard 18, and with on the circuit board with (or) printed circuit in the jack is connected, as by welding.The top 34b of each reed contact portion 34 stretches out from main part 40, and each signal reed comprises a pair of along 44 on the main part 40, can install by special installation insertion instrument.Along 44 relative, by a ledge 46 separately along 44 with the direction of insertion " B " of reed.At last, each signal reed also comprises another jut that stretches out shell 48 separately, and its effect will be explained afterwards.

Referring to Fig. 6, each grounding reed 32 occupies whole width in a chamber 26.Each grounding reed comprises a contact portion of being made up of a pair of contact arm 50, and the contact arm lean-with is equipped with the dome-shaped position 50a that stretches into notch 14, is used for contacting with the special earthing contact in edge card plug-in unit both sides.Each grounding reed comprises a maintenance part of being made up of a pair of retention arm 52, has outside edge and can be embedded on the inner surface of sidewall 12d of shell.And then below maintenance part is exactly main part 54, and a pair of afterbody 56 is reached outside the shell by main part, be used for being inserted in the jack special on the motherboard, and with motherboard on and (or) printed circuit in the jack is connected, as by welding.As each signal reed, each grounding reed has a pair of relative to " C " direction of insertion 58, is used to use special insertion instrument to install.A jut 60 is stretched out by the middle position along 58.At last, each grounding reed comprises a pair of ledge 62 that reaches outside the shell.

Before being further elaborated, here it must be noted that the whole face profile of each grounding reed 32, comprise contact portion 50, maintenance part 52, main part 54 and jut 60 and 62 all are that the sum total according to the face profile of signal reed 28 and 30 determines.This provides good ground capacity and shielding between signal reed of alternately arranging along the y direction of plug-in unit notch 14 and grounding reed.

Fig. 7 shows a pair of signal reed 28 and 30, has shown because the incline structure of socket 10 will make the signal reed have different signal path lengths with schematic diagram to a certain extent.In other words, the reed in the comparison diagram 7 is with their positions in socket and by the orientation of the socket of the fine demonstration of Fig. 5, and reed 28 can be considered to " inboard " reed; Reed 30 can be called as " outside " reed, when the reed among Fig. 7 is inserted in as shown in Figure 5 the shell 12, the part or the edge 70 that have spill on the main part 40 of outside reed 30, convex part or the edge 72 on the inboard reed placed by portion within it.Dotted line 74 on the inboard reed face 28 shown in Figure 7 and the dotted line 76 on the outside reed 30 roughly or are schematically represented the length by the signal path of reed.Though signal can be not strictly according to the path movement of these setting-out lines, the maximum flow density of signal will be along almost being that straight line flows through between reed contact portion and the afterbody, this linear path is slightly different for the outside reed with bigger main part, because it will walk around its spill edge 70.In any case, the legend of Fig. 7 clearly illustrates by the signal path of each inboard reed 28 shorter than the signal path by reed 30 outside each.Long signal path by outside reed causes the increase of inductance and the increase that therefore brings the impedance of signal reed.This is real because impedance equals square electric capacity divided by reed of inductance.Because electric capacity is directly proportional with the metallic plate area, increases the area of metallic plate, and then increase capacitance, the increase of the inductance that the increase of offsetting owing to signal path is brought.So, increase signal reed metallic plate area and will offset the increase that increases signal path and cause impedance.

Therefore, referring to Fig. 8, the present invention's plan increases the metallic plate area of the main part 40 of each inboard reed 28 and each outside reed 30 significantly, to increase signal reed 28,30 and grounding reed 32 between capacitance, and reduce the impedance of the signal reed by separately.For this reason, reed main part 40 has the lateral width size all bigger than the maximum lateral width size of contact portion 34 and maintenance part 36.

And the metallic area of the main part 40 of reed 30 made it the metallic plate area greater than the main part 40 of inboard reed 28 outside the present invention further planned to increase.As shown in Figure 8, the area of main part is by shown in the dotted line 78 and the dotted line 80 on the outside reed 30 on the inboard reed 28.By the structure of signal reed 28 and 30 as seen,

The metallic plate area of the main part 40 on the reed 30 of the outside between the dotted line 80 is bigger by 90% than the metallic plate area of the main part 40 between the dotted line 78 on the inboard reed 28.The area of main part can be with solving the compensation problem shown in the different signal paths that passes reed (as Fig. 7), so that by increasing the capacitive balance inductance separately.Therefore, reed has increased impedance thus and has been reduced.So the ledge 48 of reed is protruding and reach outside the shell 12 from the different edge of the main part 40 of reed, they are in the adiaphorous part of mechanical aspects.Therefore, these ledges are the metallic plate areas with metal processing that typically additionally can be increased on the reed, to increase its capacitance.

Obviously, under the prerequisite of not leaving spirit of the present invention or its core technology, the present invention can be embodied on other the concrete form.So it all is illustrative and hard-core that present embodiment is considered on all details, and the present invention is not limited by given here details description.

Claims (7)

1 and one has one and patches the side plugging card socket that edge and a group use near this circuit card that patches the connecting terminal on edge, comprising:

The shell of a strip comprises on the shell that one is used for inserting the strip notch that patches the edge of described circuit card and the reed installation cavity of the described notch of next-door neighbour;

One group of planar shaped reed embeds in the described reed installation cavity, and each all comprises a contact portion that reaches in the described notch described reed, is used for contacting with a connecting terminal on the circuit card; Maintenance part with maintenance edge of separating with contact portion is used for embedding the inner surface of reed installation cavity separately; Afterbody from shell, stretch out with described shell on described strip notch angled, be used for circuit motherboard on printed circuit realize being electrically connected; An and main part between described contact portion and described afterbody, the afterbody of at least a portion of each planar shaped reed, main part and contact portion have been determined a signal path with certain-length, and the main part of described at least a portion of each reed has a plate area by the signal path lengths decision of reed separately.

2, the socket of claim 1, wherein said main part comprise the jut that stretch out in the opposite direction an edge and the side of contact portion.

3, socket as claimed in claim 1, wherein said jut are disposed between two vertical with described notch usually edges.

4, socket as claimed in claim 1 further comprises a jut that stretches out described shell.

5, socket as claimed in claim 1, the angle between wherein said strip notch and the described afterbody are acute angles.

6, one is used for inserting a side plugging card socket that patches the edge with circuit card of connecting terminal, comprising:

A strip shell comprises on it that is used for inserting the strip notch that described circuit card patches the edge; One row is close to the reed installation cavity of described notch, and described shell is processed to make described notch to become an acute angle about the circuit board that described shell is installed,

One group of plate shaped signal reed alternately inserts in the described reed installation cavity in a row along y direction, and each comprises that all one reaches in the described notch described signal reed, is used for and the circuit card contacted contact portion of connecting terminal of side separately; One has maintenance and continues to use and embed the maintenance part of reed installation cavity inner surface separately; One stretch out shell be used for circuit motherboard on the afterbody that printed circuit is electrically connected; With a main part in the middle of afterbody and coupling part, the afterbody of each signal reed, main part and contact portion determine a signal path with certain-length, the main part of each described planar shaped signal reed has by a plate area of the signal path lengths decision of planar shaped signal reed separately and is inserted near the vertically grounding reed of one group of planar shaped in the reed installation cavity alternately among the described row of described signal reed, every planar shaped grounding reed have one according to the planar profile profile of next-door neighbour's planar shaped signal reed definite face profile.

7, one is used for inserting a side plugging card socket that patches the edge with circuit card of connecting terminal, comprising:

A strip shell comprises on it that is used for inserting the strip notch that described circuit card patches the edge;

One row is close to the reed installation cavity of described notch,

One group of plate shaped signal reed alternately inserts in the described reed installation cavity in a row along y direction, every pair of described signal reed all comprises one first planar shaped signal reed and one second planar shaped signal reed, each described first and second planar shaped signal reed comprises that one reaches in the described notch, is used for and the circuit card contacted contact portion of connecting terminal of side separately; One has maintenance and continues to use and embed the maintenance part of reed installation cavity inner surface separately; One stretch out shell be used for circuit motherboard on the afterbody that printed circuit is electrically connected; With a main part in the middle of afterbody and coupling part; The afterbody of each described first and second planar shaped signal reed; Main part and contact portion determine a signal path with certain-length; The length of the signal path of each second planar shaped signal reed is different from the length of the signal path of each first corresponding planar shaped signal reed; The main part of each described first and second planar shaped signal reed has the plate area that the signal path lengths by planar shaped signal reed separately determines

And the grounding reed of one group of planar shaped, described grounding reed has different profiles with described signal reed, and each grounding reed is close to vertically and many a pair of in the described signal reed is inserted in one of them of described reed installation cavity.

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