Card edge power connector and assembly method

Abstract

The invention discloses a card edge power connector and an assembly method, which relate to the technical field of connectors, and include an insulating shell, a signal terminal assembly and a plurality of power terminal pairs, wherein one end of the insulating shell is provided with a plug-in slot for inserting a PCB gold finger, and one end of the signal terminal assembly and the plurality of power terminal pairs are inserted into the insulating shell and matched with the plug-in slot; the power terminal pair includes an upper terminal group and a lower terminal group, and both the upper terminal group and the lower terminal group include a plurality of power contact terminals, and the plurality of power contact terminals are arranged in a superimposed manner; one end of the power contact terminal matched with the plug-in slot is provided with a contact structure for contacting an inserted PCB gold finger, and the contact structures in two adjacent power contact terminals have an intersection area in a direction parallel to the power contact terminal, and are staggered in a direction perpendicular to the power contact terminal, thereby solving the problem that the current carrying capacity of the current edge power connector is limited and cannot carry a larger current when in use.

Description

Technical Field

[0001] The present invention relates to the technical field of connectors, and in particular to a card edge power connector and an assembly method thereof. Background Art

[0002] The card edge power connector is also called an electrical connector or a hybrid connector, which is mainly used to carry signals and power. The card edge power connector is mainly used to transmit data, instructions, power or other signals between electronic components. The card edge power connector has been widely used in the design of many electronic devices. The card edge power connector usually includes an insulating body and a conductive terminal installed in the insulating body.

[0003] The conductive terminals in the existing card edge power connectors usually adopt a single-layer structure or a double-layer structure. Among them, the conductive terminals with a single-layer structure have problems of low mechanical strength and poor current carrying capacity when in use. Although the conductive terminals with a double-layer structure have higher mechanical strength and better current carrying capacity, as the applied current becomes larger and larger, the conductive terminals with a double-layer structure can no longer meet the current carrying capacity requirements of the existing technology. This leads to the problem that the existing card edge power connector has limited current carrying capacity and cannot carry larger currents when in use.

[0004] In the invention with application number: 201980089489.5 and publication number CN113646972A, a hybrid card edge connector and power terminal for high-power applications is disclosed, including an insulating shell, a signal terminal and a power terminal. The power terminal still adopts a double-layer structure. When in use, there is still a problem of limited current carrying capacity and inability to carry larger currents. Summary of the invention

[0005] Based on this, in order to address the above problems, the present invention proposes a card edge power connector and an assembly method, which solves the problem that the current carrying capacity of the current edge power connector is limited when in use and cannot carry a larger current.

[0006] The technical solution of the present invention is:

[0007] A card edge power connector, comprising an insulating housing, a signal terminal assembly and a plurality of power terminal pairs, wherein one end of the insulating housing is provided with a plug-in slot for inserting a PCB gold finger, and one end of the signal terminal assembly and the plurality of power terminal pairs are inserted into the insulating housing and matched with the plug-in slot;

[0008] The power terminal pair includes an upper terminal group and a lower terminal group, each of the upper terminal group and the lower terminal group includes a plurality of power contact terminals, the plurality of power contact terminals are arranged in a superimposed manner, and one end of the plurality of power contact terminals is arranged in cooperation with the plug-in slot;

[0009] One end of the power contact terminal that cooperates with the plug-in slot is provided with a contact structure for contacting the inserted PCB gold finger, and the contact structures on several power contact terminals are arranged in a coordinated manner, wherein the contact structures in two adjacent power contact terminals have an intersection area in a direction parallel to the power contact terminals and are staggered in a direction perpendicular to the power contact terminals.

[0010] Preferably, a power terminal installation cavity for installing a power terminal pair is provided in the insulating shell, and the power terminal installation cavity includes a plurality of upper cavities arranged in cooperation with the upper terminal group and a plurality of lower cavities arranged in cooperation with the lower terminal group, and one side of the plug-in slot is arranged in cooperation with the upper cavity and one end of the lower cavity, one end of the upper terminal group is inserted into the upper cavity to form a cooperation with the plug-in slot, and one end of the lower terminal group is inserted into the lower cavity to form a cooperation with the plug-in slot.

[0011] Preferably, the power contact terminal includes a pin portion, a planar connecting plate and a plurality of elastic contact arms which are connected in sequence, the pin portion, the planar connecting plate and the plurality of elastic contact arms are integrally formed, the plurality of elastic contact arms are cooperatively arranged, one end of the elastic contact arm is cooperatively arranged with the plug-in slot, the contact structure is arranged at the end of the elastic contact arm for contacting with the PCB gold finger, and the planar connecting plates in two adjacent power contact terminals can be fixedly connected by ultrasonic welding or spot welding.

[0012] Preferably, the numbers of elastic contact arms in two adjacent power contact terminals are X and Y respectively, the quantitative relationship between X and Y is: XY=1 or XY=-1, and the number of contact structures in each power contact terminal is the same as the number of elastic contact arms.

[0013] Preferably, the contact structure on the power contact terminal close to one end of the PCB gold finger is a hook-shaped bending structure, the hook-shaped bending structure is √-shaped as a whole, and the contact structure on the other power contact terminals is a folded molding structure.

[0014] Preferably, a gasket is provided between the planar connecting plates in two adjacent power contact terminals, wherein no gasket is provided between the planar connecting plate in the power contact terminal close to the PCB gold finger side and the planar connecting plate in the adjacent power contact terminal, and the gasket and the planar connecting plate can be fixedly connected by ultrasonic welding or spot welding.

[0015] Preferably, the planar connecting plate and the gasket are provided with interference protrusions, and the inner side walls of the upper cavity and the lower cavity are provided with limiting grooves that cooperate with the interference protrusions. The interference protrusions can be inserted into the limiting grooves and interfere with the limiting grooves to fix the upper terminal group and the lower terminal group when they are inserted;

[0016] Bosses are provided on both side walls of the upper cavity and the lower cavity, and the bosses are located in the middle of the upper cavity and the lower cavity;

[0017] A stop surface is provided on the plane connecting plate and the gasket, and a stop step is provided on one side of the boss to cooperate with the stop surface. The stop surface cooperates with the stop step to stop the upper terminal group and the lower terminal group when they are inserted.

[0018] Preferably, one side of the upper cavity and the lower cavity that cooperate with the plug slot is provided with an inclined surface that cooperates with the elastic contact arm;

[0019] Heat dissipation holes are arranged on one side of the upper cavity and the lower cavity that cooperate with the plug-in slot. The heat dissipation holes are arranged in cooperation with the plug-in slot, and the heat dissipation holes respectively penetrate the top and the bottom of the insulating shell.

[0020] Preferably, a signal terminal loading cavity is further provided in the insulating shell, and the other side of the plug-in slot is matched with the signal terminal loading cavity. The signal terminal assembly includes a grid plate and a plurality of signal contact terminals arranged in pairs. One end of the plurality of signal contact terminals arranged in pairs passes through the grid plate and is plugged into the grid plate, and the other end can be inserted into the signal terminal loading cavity to form a match with the plug-in slot.

[0021] A card edge power connector assembly method is used to assemble the above-mentioned card edge power connector, comprising the following steps:

[0022] Step A: Press in the signal terminal assembly;

[0023] Insert one end of a plurality of signal contact terminals arranged in pairs into the corresponding signal terminals in the insulating housing into the cavity, and then install the grid plate on the other end of the signal contact terminal to complete the assembly of the signal terminal assembly and the insulating housing;

[0024] Step B: Press in the power terminal pair;

[0025] Insert one end of the upper terminal group and the lower terminal group in the plurality of power terminal pairs into the upper cavity and the lower cavity in the insulating housing respectively, so that one end of the elastic contact arm in the power contact terminal in the upper terminal group and the lower terminal group is matched with the plug-in slot, so that the contact structure on the elastic contact arm can contact the PCB gold finger inserted into the plug-in slot, and the assembly of the power terminal pair is completed;

[0026] Step C: After completing Step A and Step B, the assembly of the card edge power connector is completed.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] The present invention arranges a plurality of power contact terminals, and arranges the plurality of power contact terminals in a multi-layer manner by overlapping them, and arranges a contact structure on an elastic contact arm in each power contact terminal, and arranges the contact structure on each power contact terminal in a staggered manner, thereby forming a multi-layer contact structure that contacts with a PCB gold finger, thereby achieving the effect of enhancing the current carrying capacity, and solving the problem that the current carrying capacity of the current edge power connector is limited and cannot carry a larger current when in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic diagram of an installation structure of a card edge power connector described in an embodiment of the present invention;

[0030] Figure 2 The structure of a card edge power connector according to an embodiment of the present invention is shown in FIG. Figure 1 ;

[0031] Figure 3 The structure of a card edge power connector according to an embodiment of the present invention is shown in FIG. Figure 2 ;

[0032] Figure 4 is a schematic structural diagram of a signal terminal assembly and a power terminal pair described in an embodiment of the present invention;

[0033] Figure 5 Schematic diagram of the partial structure of the power terminal pair described in the embodiment of the present invention Figure 1 ;

[0034] Figure 6 Schematic diagram of the structure of the power contact terminal described in the embodiment of the present invention Figure 1 ;

[0035] Figure 7 The structure of the insulating housing described in the embodiment of the present invention is schematically shown in FIG. Figure 1 ;

[0036] Figure 8 The structure of the insulating housing described in the embodiment of the present invention is schematically shown in FIG. Figure 2 ;

[0037] Fig. 9 Schematic diagram of the structure of the power contact terminal described in the embodiment of the present invention Figure 2 ;

[0038] Fig.10 Schematic diagram of the partial structure of the power terminal pair described in the embodiment of the present invention Figure 2 ;

[0039] Description of reference numerals:

[0040] 10-insulating shell, 11-PCB gold finger, 100-plug-in slot, 101-power terminal installation cavity, 102-upper cavity, 103-lower cavity, 104-limiting groove, 105-boss, 106-stop step, 107-inclined surface, 108-heat dissipation hole, 109-signal terminal loading cavity, 110-positioning guide column, 111-convex rib, 20-signal terminal assembly, 200-grid plate, 201-signal contact terminal, 30-power terminal pair, 300-upper terminal group, 301-lower terminal group, 302-power contact terminal, 303-contact structure, 304-pin part, 305-plane connecting plate, 306-elastic contact arm, 307-gasket, 308-interference protrusion, 309-stop surface. DETAILED DESCRIPTION

[0041] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0042] Example:

[0043] like Figures 1 to 5 As shown, this embodiment discloses a card edge power connector, including an insulating housing 10, a signal terminal assembly 20 and a plurality of power terminal pairs 30, one end of the insulating housing 10 is provided with a plug-in slot 100 for inserting a PCB gold finger 11, one end of the signal terminal assembly 20 and a plurality of power terminal pairs 30 are inserted into the insulating housing 10 and matched with the plug-in slot 100;

[0044] The power terminal pair 30 includes an upper terminal group 300 and a lower terminal group 301. The upper terminal group 300 and the lower terminal group 301 each include a plurality of power contact terminals 302. The plurality of power contact terminals 302 are arranged in a superimposed manner. One end of the plurality of power contact terminals 302 is arranged in cooperation with the plug slot 100.

[0045] One end of the power contact terminal 302 that is matched with the plug-in slot 100 is provided with a contact structure 303 for contacting the inserted PCB gold finger 11, and the contact structures 303 on several power contact terminals 302 are matched with each other, wherein the contact structures 303 in two adjacent power contact terminals 302 have an intersection area in a direction parallel to the power contact terminal 302, and are staggered in a direction perpendicular to the power contact terminal 302.

[0046] The present invention sets a plurality of power contact terminals 302, sets the plurality of power contact terminals 302 into multiple layers in a superimposed manner, sets a contact structure 303 on the elastic contact arm 306 in each power contact terminal 302, and sets the contact structure 303 on each power contact terminal 302 in a staggered manner, thereby forming a multi-layer contact structure 303 in contact with the PCB gold finger 11, thereby achieving the effect of enhancing the current carrying capacity, and solving the problem that the current carrying capacity of the current edge power connector is limited and cannot carry a larger current when in use.

[0047] like Fig. 9 As shown, direction B in the figure is a direction perpendicular to the power contact terminal 302 , and direction A in the figure is a direction parallel to the power contact terminal 302 .

[0048] like Figure 8 As shown, in order to facilitate the installation of the upper terminal group 300 and the lower terminal group 301 and enable the PCB gold finger 11 to better contact the upper terminal group 300 and the lower terminal group 301 after insertion, the present embodiment is improved on the basis of the above embodiment. The difference from the above embodiment is that a power terminal installation cavity 101 for installing the power terminal pair 30 is provided in the insulating shell 10, and the power terminal installation cavity 101 includes a plurality of upper cavities 102 arranged in cooperation with the upper terminal group 300 and a plurality of lower cavities 103 arranged in cooperation with the lower terminal group 301. One side of the plug-in slot 100 is arranged in cooperation with the upper cavity 102 and one end of the lower cavity 103. One end of the upper terminal group 300 is inserted into the upper cavity 102 to form a match with the plug-in slot 100, and one end of the lower terminal group 301 is inserted into the lower cavity 103 to form a match with the plug-in slot 100.

[0049] During installation, it is only necessary to insert one end of the upper terminal group 300 into the upper cavity 102 to form a match with the plug-in slot 100, and insert one end of the lower terminal group 301 into the lower cavity 103 to form a match with the plug-in slot 100, wherein the contact structure 303 on the upper terminal group 300 is located above the plug-in slot 100, and the contact structure 303 on the lower terminal group 301 is located below the plug-in slot 100, so that the PCB gold finger 11 can better form a matching contact with the contact structure 303 in the upper terminal group 300 and the lower terminal group 301 after insertion.

[0050] like Figure 6As shown, in order to enable the PCB gold finger 11 to stably contact the contact structure 303 on the upper terminal group 300 and the lower terminal group 301 after insertion, this embodiment is improved on the basis of the above embodiment. The difference from the above embodiment is that the power contact terminal 302 includes a pin portion 304, a planar connecting plate 305 and a plurality of elastic contact arms 306 connected in sequence, the pin portion 304, the planar connecting plate 305 and the plurality of elastic contact arms 306 are integrally formed, the plurality of elastic contact arms 306 are arranged in cooperation, one end of the elastic contact arm 306 is arranged in cooperation with the plug-in slot 100, the contact structure 303 is arranged at the end of the elastic contact arm 306, and is used to contact the PCB gold finger 11, and the planar connecting plates 305 in two adjacent power contact terminals 302 can be fixedly connected by ultrasonic welding or spot welding.

[0051] When in use, the setting of the elastic contact arm 306 can allow the contact structure 303 on the power contact terminal 302 to have a certain displacement. When the PCB gold finger 11 is inserted, an outward force is applied to the contact structure 303, so that the elastic contact arm 306 generates a reset force to press the contact structure 303 onto the PCB gold finger 11, so that the contact structure 303 and the PCB gold finger 11 are in more stable contact.

[0052] Preferably, a plurality of elastic contact arms 306 are provided with intervals, which are installation intervals for installing the contact structures 303 on adjacent power contact terminals 302 and blanking gaps after processing the power contact terminals 302. Retaining only the installation intervals and blanking gaps can maximize the current-carrying area and thus maximize the current-carrying capacity.

[0053] Preferably, the contact structure 303 on the power contact terminal 302 close to one end of the PCB gold finger 11 is a hook-shaped bending structure, and the hook-shaped bending structure is in a √ shape as a whole.

[0054] Preferably, the elastic contact arm 306 in the power contact terminal 302 close to one end of the PCB gold finger 11 is bent toward the PCB gold finger 11 .

[0055] Preferably, the contact structure 303 on the remaining power contact terminals 302 is a folded structure.

[0056] Preferably, the planar connecting plate 305 is an L-shaped plate.

[0057] Preferably, the pin portion 304 includes a plurality of connecting pins, and the connecting pins are welded to the planar connecting plate 305. The connecting pins are used to be welded to the PCB board to achieve electrical connection. The connecting pins can be straight or bent.

[0058] Preferably, the position of the pin portion 304 can be set according to the position of the mounting hole on the PCB board.

[0059] When the power contact terminals 302 are stacked, the overall length of each power contact terminal 302 needs to be adjusted so that the contact structures 303 on the power contact terminals 302 stacked into a multi-layer structure can cooperate with each other, so that the contact structures 303 can all contact the PCB gold fingers 11.

[0060] The overall length is set according to the distance from the PCB gold finger 11, and the overall length of the power contact terminal 302 close to the PCB gold finger 11 is less than the overall length of the power contact terminal 302 far from the PCB gold finger 11. The overall length of the power contact terminal 302 can be adjusted by adjusting the length of the elastic contact arm 306 and the length of the planar connecting plate 305.

[0061] In order to conveniently reduce the width dimension of the card edge power connector described in the present invention, this embodiment is improved on the basis of the above embodiment. The difference from the above embodiment lies in that the numbers of elastic contact arms 306 in two adjacent power contact terminals 302 are X and Y respectively, and the quantitative relationship between X and Y is: XY=1 or XY=-1, and the number of contact structures 303 in each power contact terminal 302 is the same as the number of elastic contact arms 306.

[0062] The difference in the number of elastic contact arms 306 and contact structures 303 in two adjacent power contact terminals 302 is 1. For the convenience of explanation, X is taken as 3 and Y is taken as 4, that is, the number of elastic contact arms 306 and the number of contact structures 303 in two adjacent power contact terminals 302 are 3 and 4 respectively. Since there is a gap between the elastic contact arms 306, three installation gaps will be formed between the four contact structures 303. The three contact structures 303 are respectively installed in the three installation gaps, and the contact structures 303 in two adjacent power contact terminals 302 have an intersection area in a direction parallel to the power contact terminals 302, and are staggered in a direction perpendicular to the power contact terminals 302, so that the width and length dimensions of the contact structure 303 after the power contact terminals 302 are stacked can be shortened, which is conducive to matching the size of the PCB gold finger 11 in the existing OCP standard, and can also disperse part of the insertion force caused by the non-positive pressure on the contact structure 303, effectively reducing the overall insertion force of the connector.

[0063] like Fig. 9 As shown, the width dimension direction is direction B in the figure, that is, the direction perpendicular to the power contact terminal 302 , and the length dimension direction is direction A in the figure, that is, the direction parallel to the power contact terminal 302 .

[0064] like Figure 6As shown, in order to conveniently reduce the thickness of the card edge power connector described in the present invention, this embodiment is improved on the basis of the above embodiment. The difference from the above embodiment is that a gasket 307 is provided between the planar connecting plates 305 in two adjacent power contact terminals 302, and the gasket 307 and the planar connecting plate 305 can be fixedly connected by ultrasonic welding or spot welding.

[0065] There is no gasket 307 between the planar connecting plate 305 in the power contact terminal 302 close to the PCB gold finger 11 and the planar connecting plate 305 in the adjacent power contact terminal 302 .

[0066] Since the elastic contact arm 306 in the power contact terminal 302 near one end of the PCB gold finger 11 is bent toward the PCB gold finger 11, no interference will occur during plugging and unplugging. Therefore, no gasket 307 is set between the plane connecting plate 305 in the power contact terminal 302 near one side of the PCB gold finger 11 and the plane connecting plate 305 in the adjacent power contact terminal 302.

[0067] At the same time, ultrasonic welding or spot welding is used to fix the card edge power connector, which can effectively reduce the thickness of the card edge power connector of the present invention.

[0068] When there is no gasket 307 between two adjacent power contact terminals 302 in the outer layer, interference will occur during the plugging and unplugging process, causing poor contact problems. Therefore, it is necessary to set a gasket 307 between the planar connecting plates 305 in two adjacent power contact terminals 302, except between the planar connecting plate 305 in the power contact terminal 302 on the side close to the PCB gold finger 11 and the planar connecting plate 305 in the two adjacent power contact terminals 302.

[0069] In another embodiment, when the number of the power contact terminals 302 is 2, the planar connecting plates 305 of the two power contact terminals 302 do not contact each other. Fig.10 shown.

[0070] In order to facilitate the fixation of the upper terminal group 300 and the lower terminal group 301 during insertion, the present embodiment is improved on the basis of the above embodiment, and the difference from the above embodiment lies in that interference protrusions 308 are provided on the planar connecting plate 305 and the gasket 307, and limiting grooves 104 cooperating with the interference protrusions 308 are provided on the inner side walls of the upper cavity 102 and the lower cavity 103. The interference protrusions 308 can be inserted into the limiting grooves 104 and interfere with the limiting grooves 104, so as to fix the upper terminal group 300 and the lower terminal group 301 during insertion.

[0071] When in use, the interference protrusion 308 can be inserted into the limiting groove 104 and interfere with the limiting groove 104 to fix the upper terminal group 300 and the lower terminal group 301 when inserted.

[0072] In order to facilitate the elastic contact arm 306 to have a certain side clearance when it produces elastic deformation, this embodiment is improved on the basis of the above embodiment. The difference from the above embodiment is that a boss 105 is provided on the two side walls of the upper cavity 102 and the lower cavity 103, and the boss 105 is located in the middle of the upper cavity 102 and the lower cavity 103.

[0073] The arrangement of the boss 105 can ensure the side clearance required for the elastic contact arm 306 in the power contact terminal 302 to produce elastic deformation, thereby avoiding interference with the insulating housing 10 and causing defects.

[0074] like Figure 6 , Figure 8 As shown, in order to facilitate the stopping of the upper terminal group 300 and the lower terminal group 301 after insertion, the present embodiment is improved on the basis of the above embodiment, and the difference from the above embodiment lies in that a stop surface 309 is provided on the planar connecting plate 305 and the gasket 307, and a stop step 106 which is arranged in coordination with the stop surface 309 is provided on one side of the boss 105, and the stop surface 309 cooperates with the stop step 106 to stop the upper terminal group 300 and the lower terminal group 301 when they are inserted.

[0075] When in use, the stop surface 309 cooperates with the stop step 106 to stop the upper terminal set 300 and the lower terminal set 301 when they are inserted.

[0076] In order to facilitate the elastic contact arm 306 not contacting the insulating shell 10 when deformed by pressure, the present embodiment is improved on the basis of the above embodiment. The difference from the above embodiment lies in that the upper cavity 102 and the lower cavity 103 are provided with an inclined surface 107 which is arranged to cooperate with the elastic contact arm 306 on one side of the plug-in slot 100.

[0077] When in use, the arrangement of the inclined surface 107 can provide a larger space for the elastic contact arm 306 to deform, thereby preventing the elastic contact arm 306 from interfering with the insulating housing 10 after elastic deformation.

[0078] like Figure 7 As shown, in order to facilitate the optimization of the flow-through temperature rise performance, this embodiment is improved on the basis of the above embodiment. The difference from the above embodiment is that the upper cavity 102 and the lower cavity 103 are both provided with heat dissipation holes 108 on one side that cooperates with the plug-in slot 100. The heat dissipation holes 108 are arranged in cooperation with the plug-in slot 100, and the heat dissipation holes 108 pass through the top of the insulating shell 10 and the bottom of the insulating shell 10 respectively.

[0079] When in use, the heat dissipation holes 108 can provide a heat dissipation channel, thereby better optimizing the flow-through temperature rise performance.

[0080] like Figure 8 As shown, in order to facilitate the installation of the signal terminal assembly 20, this embodiment is improved on the basis of the above embodiment. The difference from the above embodiment is that a signal terminal loading cavity 109 is further provided in the insulating shell 10, and the other side of the plug-in slot 100 is matched with the signal terminal loading cavity 109. The signal terminal assembly 20 includes a grid plate 200 and a plurality of signal contact terminals 201 arranged in pairs. One end of the plurality of signal contact terminals 201 passes through the grid plate 200 and is plugged into the grid plate 200, and the other end can be inserted into the signal terminal loading cavity 109 to form a match with the plug-in slot 100.

[0081] Preferably, a pair of positioning guide posts 110 are provided at the bottom of the insulating housing 10 , and the positioning guide posts 110 are used for positioning the card edge power connector of the present invention when it is installed on a PCB board.

[0082] Preferably, a pair of convex ribs 111 are provided between two adjacent power terminal installation cavities 101 , and the two convex ribs 111 are used to separate the upper cavity 102 and the lower cavity 103 in the two adjacent power terminal installation cavities 101 .

[0083] The ribs 111 are used to increase the electrical clearance and creepage distance between the power terminal pairs 30, which can effectively improve the voltage resistance performance.

[0084] A card edge power connector assembly method is used to assemble the above-mentioned card edge power connector, comprising the following steps:

[0085] Step A: Pressing in the signal terminal assembly 20;

[0086] Insert one end of a plurality of signal contact terminals 201 arranged in pairs into the corresponding signal terminal cavity 109 in the insulating housing 10, and then install the grid plate 200 on the other end of the signal contact terminal 201 to complete the assembly of the signal terminal assembly 20 and the insulating housing 10;

[0087] Step B: Press in the power terminal pair 30;

[0088] Insert one end of the upper terminal group 300 and the lower terminal group 301 in the plurality of power terminal pairs 30 into the upper cavity 102 and the lower cavity 103 in the insulating housing 10 respectively, so that one end of the elastic contact arm 306 in the power contact terminal 302 in the upper terminal group 300 and the lower terminal group 301 is matched with the plug-in slot 100, so that the contact structure 303 on the elastic contact arm 306 can contact the PCB gold finger 11 inserted into the plug-in slot 100, and the power terminal pair 30 is assembled;

[0089] Step C: After completing Step A and Step B, the assembly of the card edge power connector is completed.

[0090] The method of the present invention can be used to quickly complete the assembly of the card edge power connector of the present invention.

[0091] Working principle of the present invention:

[0092] The present invention sets a plurality of power contact terminals 302, and sets the plurality of power contact terminals 302 into multiple layers in an overlapping manner, sets a contact structure 303 on the elastic contact arm 306 in each power contact terminal 302, and sets the contact structure 303 on each power contact terminal 302 in an offset manner, thereby forming a multi-layer contact structure 303 in contact with the PCB gold finger 11, thereby achieving the effect of enhancing the current carrying capacity.

[0093] The above-mentioned embodiments only express the specific implementation of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A card edge power connector, characterized in that: The invention comprises an insulating housing (10), a signal terminal assembly (20) and a plurality of power terminal pairs (30); one end of the insulating housing (10) is provided with a plug-in slot (100) for inserting a PCB gold finger (11); one end of the signal terminal assembly (20) and the plurality of power terminal pairs (30) are inserted into the insulating housing (10) and arranged in cooperation with the plug-in slot (100); the power terminal pairs (30) comprise an upper terminal group (300) and a lower terminal group (301); the upper terminal group (300) and the lower terminal group (301) both comprise a plurality of power contact terminals (302); the plurality of power contact terminals (302) are arranged in a stacked manner; one end of the plurality of power contact terminals (302) is arranged in cooperation with the plug-in slot (100); One end of the power contact terminal (302) that cooperates with the plug slot (100) is provided with a contact structure (303) for contacting an inserted PCB gold finger (11); the contact structures (303) on a plurality of power contact terminals (302) are cooperatively arranged, wherein the contact structures (303) in two adjacent power contact terminals (302) have an intersecting area in a direction parallel to the power contact terminals (302) and are staggered in a direction perpendicular to the power contact terminals (302); the power contact terminal (302) comprises a pin portion (304), a planar connecting plate (305) and a plurality of elastic contact arms (306) that are connected in sequence; the pin portion (304), the planar connecting plate (305) and the plurality of elastic contact arms (306) is integrally formed, a plurality of elastic contact arms (306) are cooperatively arranged, one end of the elastic contact arm (306) is cooperatively arranged with the plug slot (100), a contact structure (303) is arranged at the end of the elastic contact arm (306) for contacting the PCB gold finger (11), the plane connecting plates (305) in two adjacent power contact terminals (302) can be fixedly connected by ultrasonic welding or spot welding, the number of elastic contact arms (306) in two adjacent power contact terminals (302) is X and Y respectively, the number relationship between X and Y is: XY=1 or XY=-1, and the number of contact structures (303) in each power contact terminal (302) is the same as the number of elastic contact arms (306); A gasket (307) is provided between the planar connecting plates (305) in two adjacent power contact terminals (302), wherein no gasket (307) is provided between the planar connecting plate (305) in the power contact terminal (302) close to the side of the PCB gold finger (11) and the planar connecting plate (305) in the adjacent power contact terminal (302), and the gasket (307) and the planar connecting plate (305) can be fixedly connected by ultrasonic welding or spot welding.

2. A card edge power connector according to claim 1, characterized in that: A power terminal installation cavity (101) for installing a power terminal pair (30) is provided in the insulating housing (10); the power terminal installation cavity (101) comprises a plurality of upper cavities (102) arranged in cooperation with the upper terminal group (300) and a plurality of lower cavities (103) arranged in cooperation with the lower terminal group (301); one side of the plug-in slot (100) is arranged in cooperation with the upper cavity (102) and one end of the lower cavity (103); one end of the upper terminal group (300) is inserted into the upper cavity (102) to form a cooperation with the plug-in slot (100); and one end of the lower terminal group (301) is inserted into the lower cavity (103) to form a cooperation with the plug-in slot (100).

3. The card edge power connector according to claim 2, characterized in that: The contact structure (303) on the power contact terminal (302) close to one end of the PCB gold finger (11) is a hook-shaped bending structure, and the hook-shaped bending structure is in a √ shape as a whole. The contact structures (303) on the other power contact terminals (302) are folded-back molding structures.

4. The card edge power connector according to claim 3, characterized in that: An interference protrusion (308) is provided on the plane connecting plate (305) and the gasket (307); a limiting groove (104) is provided on the inner side walls of the upper cavity (102) and the lower cavity (103) to cooperate with the interference protrusion (308); the interference protrusion (308) can be inserted into the limiting groove (104) to be interference-fitted with the limiting groove (104) and is used to fix the upper terminal group (300) and the lower terminal group (301) when they are inserted; Bosses (105) are provided on both side walls of the upper cavity (102) and the lower cavity (103), and the bosses (105) are located in the middle of the upper cavity (102) and the lower cavity (103); A stop surface (309) is provided on the planar connecting plate (305) and the gasket (307), and a stop step (106) is provided on one side of the boss (105) to cooperate with the stop surface (309). The stop surface (309) cooperates with the stop step (106) to stop the upper terminal group (300) and the lower terminal group (301) when they are inserted.

5. The card edge power connector according to claim 4, characterized in that: One side of the upper cavity (102) and the lower cavity (103) that cooperate with the plug slot (100) is provided with an inclined surface (107) that cooperates with the elastic contact arm (306); A heat dissipation hole (108) is provided on one side of the upper cavity (102) and the lower cavity (103) that cooperates with the plug slot (100); the heat dissipation hole (108) is arranged in cooperation with the plug slot (100), and the heat dissipation hole (108) passes through the top of the insulating shell (10) and the bottom of the insulating shell (10), respectively.

6. The card edge power connector according to claim 5, characterized in that: A signal terminal loading cavity (109) is also provided in the insulating housing (10), and the other side of the plug-in slot (100) is arranged in cooperation with the signal terminal loading cavity (109). The signal terminal assembly (20) comprises a grid plate (200) and a plurality of signal contact terminals (201) arranged in pairs. One end of the plurality of signal contact terminals (201) passes through the grid plate (200) and is plugged into the grid plate (200), and the other end can be inserted into the signal terminal loading cavity (109) to form a cooperation with the plug-in slot (100).

7. A card edge power connector assembly method, characterized in that: A card edge power connector for assembling any one of claims 1 to 6, comprising the following steps: Step A: Pressing in the signal terminal assembly (20); Inserting one end of a plurality of signal contact terminals (201) arranged in pairs into the corresponding signal terminal insertion cavity (109) in the insulating housing (10), and then installing the grid plate (200) on the other end of the signal contact terminal (201), thereby completing the assembly of the signal terminal assembly (20) and the insulating housing (10); Step B: Press in the power terminal pair (30); Inserting one end of an upper terminal group (300) and a lower terminal group (301) in a plurality of power terminal pairs (30) into an upper cavity (102) and a lower cavity (103) in an insulating housing (10) respectively, so that one end of an elastic contact arm (306) in a power contact terminal (302) in the upper terminal group (300) and the lower terminal group (301) is matched with the plug-in slot (100), so that a contact structure (303) on the elastic contact arm (306) can contact a PCB gold finger (11) inserted into the plug-in slot (100), thereby completing assembly of the power terminal pairs (30); Step C: After completing Step A and Step B, the assembly of the card edge power connector is completed.

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