CN2422740Y - Electric connector - Google Patents

Abstract

An electrical connector includes a cover, a base, a driving device and conductive terminals, wherein the cover is provided with a plurality of receiving holes for receiving CPU pins, and the base is correspondingly provided with terminal receiving grooves for receiving the conductive terminals, wherein the conductive terminals include The contact part, the positioning part and the soldering part, the solder ball is held on the soldering part, and a connecting part is provided between the contact part and the positioning part, and a layer of solder repelling layer is provided on the surface of the connecting part, so that the solder ball is melted to dissipate the solder ball. When the connector group is set on the circuit board, due to the solder-repelling layer of the connecting part, the tin liquid cannot climb upwards, effectively preventing the solder from accumulating at the contact part of the conductive terminal and hindering the electrical contact between the CPU pin and the conductive terminal.

Description

Electric connector

The relevant a kind of electric connector of the utility model refers in particular to a kind of electric connector that is used to electrically connect central processing unit (CPU) and circuit board and has anti-overflow tin function.

Because the function of electronic installation is constantly progressive, upgrading, makes its inner electronic component also must change thereupon, can produce more favorable effects to support the new function of electronic installation.Especially for integrated circuit modules such as computer cpus, undermine expensive central processing unit, can cooperate by an electric connector usually its group is located on the circuit board for avoiding bad welding.Usually this electric connector is provided with a pedestal and the cover plate of pedestal slip relatively, wherein this cover plate is provided with accepting groove on several, and corresponding being provided with in order to holding the following accepting groove of conducting terminal on the pedestal, and between cover plate and pedestal, being provided with drive unit and this electric connector optionally being in unclamp or closure state and reach the effect of zero insertion force.When the assembling central processing unit, make this electric connector be in releasing orientation earlier, central processing unit is put on this electric connector, stretched through accepting groove on the cover plate and being contained under the pedestal in the accepting groove of central processing unit pin wherein, and this moment, central processing unit did not contact with corresponding conducting terminal, then by drive unit make pedestal with respect to cover plate to a side shifting, and the pin that can make central processing unit electrically contacts with conducting terminal in the following accepting groove.And when the dismounting central processing unit, can act on drive unit pedestal is moved to opposite side relative to cover plate, and the pin of central processing unit and conducting terminal are separated, can very easily central processing unit be pulled down like this.At present, electric connector adopts the piercing welding mode to be connected on the circuit board usually, and it interts and weld in opposite side in the perforation of circuit board again to convexedly stretch in the outer long column shape conducting terminal end of base of electric connector.Yet this mode must take the space of circuit board both sides simultaneously, and on circuit board, also the perforation that is array-like equally must be set, more than number of terminals and under the situation of very high density, this mode both had been unfavorable for the manufacturing of circuit board, also be unfavorable for the utilization of the confined space on the circuit board, in the assembling of pegging graft, great difficulty arranged also simultaneously.Therefore introduced ball array encapsulation (ball gridarray at present again, BGA) integrated circuit module packaged type, be directly to adopt tin material (being generally the tin ball) to be welded between circuit board and the electric connector, at this moment, the conducting terminal of electric connector will form one and be used for being stained with the engagement end that connects the tin ball, and replace intrinsic perforation by discoid contact mat on circuit board.So, align the contact mat of circuit board when the terminal that speckles with spherical tin material after, terminal and contact mat electrically can be bonded together after making the fusing of tin ball through suitable heating again.But, because electric connector is light, thin, short, little variation tendency, the height of this electric connector conducting terminal is scaled-back also, thereby cause engagement end that conducting terminal connects the tin ball and conducting terminal quite little with distance between the contact jaw that the CPU pin electrically contacts, when tin ball heat fused, because terminal surfaces immersional wetting, tin liquor can upwards be climbed along conducting terminal (being so-called solder overflow) and be accumulated in the conducting terminal contact jaw, drive central processing unit when pedestal moves at the electric connector lid like this, the tin material that the part pin of central processing unit may be accumulated in the conducting terminal contact jaw stops, contact with the electrical of conducting terminal and hinder other pin, severe patient, the part pin may be fractureed and central processing unit is scrapped.And consider from the angle of telecommunication conduction, hinder increase because the tin material that exists can cause pin and conducting terminal to get an electric shock indirectly between central processing unit pin and conducting terminal, and be unfavorable for the signal transmission between central processing unit and the circuit board.

The utility model purpose is to provide a kind of and can effectively prevents to overflow tin and can effectively protect central processing unit, and can guarantee the electric connector of signal reliable transmission between central processing unit and circuit board.

For achieving the above object, the utility model adopts following technical scheme: this creation electric connector comprises lid, pedestal, drive unit and conducting terminal, wherein lid is provided with several accepting holes of accommodating the CPU pin, and the pedestal correspondence is provided with the terminal containing slot of accommodating conducting terminal, wherein conducting terminal includes and bends the contact site that is circular-arc and forms the receiving space of accommodating CPU pin end, conducting terminal is positioned the location division in the terminal containing slot and is positioned at the terminal and vertically disposed weld part in location division in location division, and weld part is provided with the tin ball, it is characterized in that, be provided with a junction between conducting terminal contact site and the location division, this connecting portion surface is provided with one deck and refuses layer, like this in tin ball fusing when being set to the electric connector group on the circuit board, because connecting portion is refused the weldering effect of refusing of layer, tin liquor can not upwards be climbed and effectively be prevented tin liquor to be accumulated in the conducting terminal contact site and hinder electrical contact the between CPU pin and conducting terminal.

Compared to prior art, the conducting terminal of the utility model electric connector is refused layer owing to be provided with one, thereby the tin liquor that can stop fusing rises to the place, host side of contact site and hinders electrical contact the between CPU pin and conducting terminal along electrical contact surfaces, and can guarantee to have enough tin material between conducting terminal weld part and circuit board welded gasket and reach firm the connection.

Below in conjunction with diagram and embodiment the utility model is further described.

The three-dimensional exploded view of Fig. 1 the utility model electric connector.

Fig. 2 is the conducting terminal shown in Figure 1 and the enlarged diagram of tin ball.

Fig. 3 is the conducting terminal shown in Figure 2 and the end view of tin ball, and wherein conducting terminal and tin ball are by partly cut-away.

Fig. 4 is the cross-sectional schematic that the central processing unit pin docks with the utility model electric connector, and wherein electric connector is welded on the circuit board and is in releasing orientation.

Fig. 5 is the cross-sectional schematic that the central processing unit pin docks with the utility model electric connector, and wherein electric connector is welded on the circuit board and is in closure state.

See also shown in Figure 1, the utility model electric connector 1 comprises pedestal 10, the lid 11 of covering on pedestal 10, be located at pedestal 10 1 sides and can drive the drive unit 12 and the conducting terminal 13 of lid 11 relative pedestal 10 slippages, wherein lid 11 is provided with several and runs through on the lid 11, the accepting hole 110 of lower surface, and on pedestal 10, be provided with corresponding terminal containing slot 100, conducting terminal 13 is located in the corresponding terminal containing slot 100, CPU places also can be with together pedestal 10 slippages relatively of lid 11 on electric connector 1 lid 11, and passing the accepting hole 110 and the end of lid 11, CPU pin 2 (Fig. 4 shows) is contained in pedestal 10 terminal containing slots 100, and according to the glide direction of lid 11 relative pedestals 10 and electrically conduct with conducting terminal 13 or disconnect.

See also Fig. 2 and shown in Figure 3, the conducting terminal 13 of the utility model electric connector 1 comprises the contact site 130 that electrically contacts with CPU pin 2, the location division 133 that 13 groups of conducting terminals are fixed in pedestal 10 terminal containing slots 100 reaches the weld part 136 that is connected and electrically connects with conducting terminal 13 and circuit board 3 (Fig. 4 shows) with tin ball 14, and be connected as a single entity by a junction 138 between contact site 130 and the location division 133, wherein contact site 130 is the metal lamellar body of a curved arc shape, the bending place of these contact site 130 1 sides is formed with host side 131, and the bulk of these host side 131 bending containings is greater than the diameter of CPU pin 2.In addition, extended to form two bare terminal ends 132 parallel and respect to one another in contact site 130 with respect to another distolateral place one of host side 131, the relative spacing of this two bare terminal end 132 is then less than the diameter of CPU pin 2.Connecting portion 138 appropriate location on host side 131 is sentenced a proper width one and is extended, and scribbles one deck in connecting portion 138 surfaces and refuse layer 139 with what prevent that tin liquor from upwards climbing, as paint etc.Location division 133 is microscler plate body shape, and its two relative lateral border respectively is provided with several projectioies 134, and can be used for engaging with 100 interference of pedestal 10 terminal containing slots, and whole conducting terminal 13 is immobilizated in pedestal 10 terminal containing slots 100.In addition, 133 downsides are provided with two mutual breach 135 at interval in the location division, and between this two breach 135 with the location division 133 vertical weld parts 136 that are provided with, these weld part 136 downsides are provided with an arcuation notch 137, tin ball 14 is adhered on the weld part 136, and the profile on tin ball 14 tops and notch 137 fit.

Please join shown in Figure 4, when being immobilizated in this electric connector 1 on the circuit board 3,14 fusings of tin ball are electrical connected the welded gasket (not shown) on conducting terminal 13 and the circuit board 3, since connecting portion 138 refuse layer 139, tin liquor can not rise in conducting terminal 13 contact sites 130 host sides 131 along conducting terminal 13, and can only accumulate in weld part 136 upper and lower surfaces.And, CPU pin 2 is located in conducting terminal 13 host sides 131 and bends the inner space of containing, because this bulk is greater than the diameter of CPU pin 2, so when this electric connector 1 was in releasing orientation, CPU pin 2 did not connect with arbitrary part of host side 131.Please consult shown in the 5th simultaneously again, when making this electric connector 1 be in closure state when drive unit 12 driving lid 11 relative pedestal 10 slippages, CPU pin 2 moves to conducting terminal 13 bare terminal ends 131, because the spacing between the two relative bare terminal ends 132 is less than the diameter of CPU pin 2, thereby can be held end 132 clampings and electrically conducts reliably with conducting terminal 13 formation.

Claims (8)

1. electric connector, be used to electrically connect central processing unit and circuit board, comprise pedestal, lid and conducting terminal, wherein pedestal is provided with several and runs through on it, the terminal containing slot of lower surface, and lid hides on pedestal and pedestal slippage relatively, it is provided with, and several are corresponding with the pedestal terminal containing slot to accommodate the accepting hole of central processing unit pin, conducting terminal is located in the pedestal terminal containing slot, it comprises the contact site that electrically docks with the central processing unit pin, interfere the location division of engaging and use the weld part that is connected with circuit board with the pedestal terminal containing slot, it is characterized in that: be provided with a junction between location division and contact site, and scribble on this connecting portion surface and to refuse layer.

2. electric connector according to claim 1 is characterized in that: this electric connector also is provided with the drive unit of the relative pedestal slippage of a driving lid.

3. electric connector according to claim 1, it is characterized in that: the conducting terminal contact site is the metal lamellar body of a curved arc shape, the bending place of this contact site one side forms the host side, and the interior space dimension of this host side bending is greater than the central processing unit pin diameter.

4. electric connector according to claim 3 is characterized in that: a relative end with conducting terminal contact site host side is provided with two bare terminal ends parallel and respect to one another, and the relative spacing of this two bare terminal end is less than the diameter of central processing unit pin.

5. electric connector according to claim 4 is characterized in that: the location division is a microscler plate body shape, and is provided with in its relative both side edges and can makes conducting terminal be immobilizated in projection in the terminal containing slot.

6. electric connector according to claim 5 is characterized in that: location division one lateral margin is provided with two mutual at interval breach, and weld part is located between this two breach and vertical mutually with the location division.

7. electric connector according to claim 6 is characterized in that: described weld part downside is provided with an arc notch.

8. electric connector according to claim 7 is characterized in that: described conducting terminal weld part is provided with a tin ball, and the profile and the notch of this tin ball upper end fit.

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