Small-sized high-current electrical connector and matching connector thereof

Abstract

A small-sized high-current electrical connector and a matching connector thereof. The small-sized high-current electrical connector comprises an insulator and contact elements inserted into the insulator, wherein a locking slot extending in an insertion direction of the connector is provided in the insulator, and is configured to be interlocked with a locking claw on a matching connector in a fitting manner; a sliding pressing plate which slides in the insertion direction is further provided on the insulator; and when the locking claw on the matching connector fits with the locking slot, the sliding pressing plate can slide to a locking position where the locking claw on the matching connector can be prevented from being disengaged from the locking slot. In the small-sized high-current electrical connector and the matching connector thereof, when a plug fits with a socket, a pull-ring locking structure is used, such that the reliability of wire-to-board usage scenarios is ensured, and the unlocking during the operation in a narrow space is facilitated. The small-sized high-current electrical connector and the matching connector thereof have the characteristics of small size, high current-carrying capacity and high space utilization rate, thereby facilitating the miniaturization development of servers.

Description

Small size and high current electrical connector and its adapter Technical Field

[0001] The present invention belongs to the technical field of connectors, and in particular relates to a small-volume, high-current electric connector and an adapter connector thereof. Background Art

[0002] Currently, server board connectors are generally larger in size to ensure flow capacity.

[0003] Similar electrical connector products generally use unlocking structures such as side-press locking and locking clips that require close-range operation.

[0004] The inter-board connector with the above structure has the following disadvantages:

[0005] Under high current conditions, the connector is too large, which is not conducive to the miniaturization and integration of servers;

[0006] When the plug and socket are mated, locking structures such as side press locking and locking bayonet are not conducive to unlocking in narrow space operations.

[0007] Summary of the Invention

[0008] In order to solve the above technical problems, the present invention provides a small-volume, high-current electrical connector and an adapter connector thereof.

[0009] The objectives of the present invention are achieved by the following technical solution: A small-volume, high-current electrical connector according to the present invention comprises an insulator and a contact member inserted into the insulator. The insulator is provided with a locking groove extending in the connector insertion direction, the locking groove being configured to engage with a locking claw on a mating connector for locking. The insulator is also provided with a sliding pressure plate that slides in the insertion direction. When the locking claw on the mating connector engages with the locking groove, the sliding pressure plate can slide to a locking position that prevents the locking claw on the mating connector from disengaging from the locking groove.

[0010] Furthermore, the side wall of the locking groove is provided with a snap-fitting groove.

[0011] Furthermore, the insulator is provided with an elastic member which causes the sliding pressure plate to have a tendency to move toward the plug-in end.

[0012] Furthermore, a stop structure is provided at the end of the insulator away from the plug-in end, and a stop extending in the plug-in direction is provided on the side of the stop structure facing the plug-in end. A groove is provided on the side of the sliding pressure plate away from the plug-in end, and the groove and the stop can move relative to each other. A spring is provided in the groove, one end of which rests on the stop end face and the other end rests on the side wall of the groove close to the plug-in end.

[0013] Furthermore, the outer surface of the insulator is provided with an inner slide groove extending along the plug-in direction and connected to the locking groove, and an outer slide groove located on both sides of the inner slide groove and extending along the plug-in direction. The side walls of the inner slide groove are provided with inner slide rails extending along the plug-in direction, and the side walls of the outer slide groove are provided with outer slide rails extending along the plug-in direction. The sliding pressure plate is slidably arranged in the inner slide groove and the outer slide groove, and slidably cooperates with the outer slide rail and the inner slide rail. A stop table is provided on the inner slide rail and the outer slide rail to limit the moving range of the sliding pressure plate. The sliding pressure plate cooperates with the outer slide groove so that the two side surfaces of the sliding pressure plate do not protrude from the two side surfaces of the insulator.

[0014] Furthermore, the end of the sliding pressure plate away from the plug-in end is connected to a drawstring.

[0015] Furthermore, the insulator has a cavity extending along the plug-in direction, and a mounting groove for inserting the contact piece is provided in the cavity, and the contact piece is a sheet-type contact piece; a limiting groove is provided on the sheet-type contact piece, and the extension direction is perpendicular to the plug-in direction. After the sheet-type contact piece is inserted into the mounting groove, a plug block is inserted into the limiting groove, and the plug block is simultaneously inserted into the insulator.

[0016] Furthermore, the portion of the sheet contact away from the plug-in end is bent, and the bent portion is provided with a pin extending out of the insulator and connected to the PCB board.

[0017] An adapter connector for a small-volume, high-current electrical connector includes an insulator and a socket structure inserted into the insulator. A gap is left in the socket structure for inserting a corresponding connector. A locking claw is inserted into the insulator. The locking claw includes a claw extending in the plug-in direction. A claw protrusion for snap-fitting is provided on one side of the claw, and a space is left on the other side.

[0018] Furthermore, the socket structure is a bent structure, one side of which is a spring claw that contacts the contact piece, and the other side is provided with a first socket pin that passes through the insulator and is not parallel to the plug-in direction, and the first socket pin is connected to the PCB board.

[0019] Furthermore, the plug-in end of the socket structure is a spring claw that contacts the contact piece, and a second socket pin extending in a direction opposite to the plug-in direction is provided on the side of the socket structure away from the plug-in end, and the second socket pin is connected to the PCB board.

[0020] Furthermore, the socket structure is forcibly installed in the cavity of the insulator through barbs, and the width of the cavity of the insulator at the insertion entrance end matches the thickness of the socket structure.

[0021] Compared with the prior art, the present invention is beneficial in that:

[0022] The small-volume, high-current electrical connector and the matching connector thereof of the present invention have small volume, large current flow, high space utilization, and are conducive to the miniaturization development of servers.

[0023] The small-volume, high-current electrical connector and its adapter connector of the present invention adopt a pull-ring locking structure when the connector and its adapter connector are matched, which ensures the reliability of the wire-to-board usage scenario and facilitates unlocking in a small space.

[0024] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the following preferred embodiments are specifically cited and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] FIG1a is a schematic diagram of an embodiment of a wiring plug of the present invention;

[0026] FIG1b is a schematic diagram of an embodiment of a welding plate plug according to the present invention;

[0027] FIG1c is a schematic diagram of an embodiment of a bent welding plate socket according to the present invention;

[0028] FIG1d is a schematic diagram of an embodiment of a vertical welding board socket of the present invention;

[0029] FIG2 a is an exploded schematic diagram of an embodiment of a wiring plug of the present invention;

[0030] FIG2b-1 is a schematic diagram of the plug insulator and the locking claw of the socket end in FIG2a being plugged in and out;

[0031] FIG2b-2 is a schematic diagram of the plug insulator, sliding pressure plate, pull strap and locking claw at the socket end after being plugged in FIG2a;

[0032] FIG2c-1 is a schematic diagram of the assembly of the plug insulator and the sliding pressure plate in FIG2a;

[0033] Figure 2c-2 is a side view of Figure 2c-1;

[0034] Figure 2c-3 is a cross-sectional view of point A in Figure 2c-2;

[0035] FIG2d-1 is a top view of the plug insulator in FIG2a;

[0036] FIG2d-2 is a bottom view of the sliding plate in FIG2a;

[0037] FIG2d-3 is a half-sectional view of an embodiment of a wiring plug of the present invention in an initial state;

[0038] FIG2d-4 is a half-sectional view of an embodiment of a wiring plug of the present invention in an unlocked state;

[0039] FIG3 is an exploded schematic diagram of an embodiment of a welding plate plug of the present invention;

[0040] FIG4a is an exploded schematic diagram of an embodiment of a bent welding plate socket according to the present invention;

[0041] FIG4b is a schematic diagram of the plug-end contact piece and the jack structure in FIG4a;

[0042] FIG5 a is an exploded schematic diagram of an embodiment of a vertical welding board socket of the present invention;

[0043] FIG5 b is a rear view of an embodiment of a vertical welding board socket of the present invention;

[0044] FIG6 a is a schematic diagram of the connection plug and the bent welding plate socket according to the present invention;

[0045] FIG6 b is a schematic diagram of the wiring plug and the vertical welding board socket according to the present invention;

[0046] FIG6 c is a schematic diagram of the welding plate plug and the bent welding plate socket according to the present invention being plugged into each other.

[0047] [Figure Markings] 11-wiring plug, 12-welding board plug, 101-first plug insulator, 10101-locking groove, 10102-card slot, 10103-stop structure, 10104-outer slide rail, 10105-stop platform, 10106-stop, 10107-inner slide rail, 10108-installation groove, 10109-inner slide groove, 10110-outer slide groove, 10111-stop end face, 102-first contact piece, 10201-limiting groove I, 103-first contact piece, 10301-limiting groove II, 104-block, 105-sliding pressure plate, 10501-locking protrusion, 10502-groove, 106-spring, 107-pull belt, 108-second plug insulator, 109-second contact piece, 110-second Contact piece, 111-plug pin, 112-rib plate, 21-bent soldering plate socket, 22-vertical soldering plate socket, 201-first socket insulator, 20101-mounting hole, 202-first socket structure, 203-first socket structure, 204-locking claw, 20401-claw, 20402-claw protrusion, 20403-mounting cantilever, 20404-mounting protrusion, 205-second socket insulator, 206-second socket structure, 207-second socket structure, 208-first socket pin, 209-second socket pin, 210-spring claw, 3-horizontal PCB board, 4-vertical PCB board, 5-cable. DETAILED DESCRIPTION

[0048] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0049] As shown in Figures 1a to 1d, the small-volume, high-current electrical connector of the present invention includes two embodiments: a wiring plug 11 and a welding plate plug 12 on the plug side. The socket compatible with the small-volume, high-current electrical connector also includes two embodiments: a curved welding plate socket 21 and a vertical welding plate socket 22 on the socket side. The embodiments of the wiring plug 11, welding plate plug 12, curved welding plate socket 21, and vertical welding plate socket 22 are described below. In other embodiments, the plug-side and socket-side structures can be swapped as needed, which will not be described in detail here.

[0050] The structure of the terminal plug 11 is shown in Figures 2a to 2d-4, using the orientation shown in the figures as an example for illustration. The terminal plug 11 includes a first plug insulator 101, a sliding pressure plate 105, plug contacts, a plug block 104, a spring 106, and a pull strap 107. In this embodiment, the plug contacts include first contacts 102 and first contacts 103. The plug end of the first plug insulator 101 has an opening, and the plug contacts extend out of the cavity within the first plug insulator 101, allowing the plug contacts within the first plug insulator 101 to mate with the receptacle structure within the receptacle. The end of the first plug insulator 101, away from the plug end, has an opening for receiving a cable 5, which then connects to the plug contacts.

[0051] The upper portion of the first plug insulator 101 has a locking portion extending in the insertion direction. This locking portion cooperates with the sliding pressure plate 105 to achieve insertion and locking engagement with the locking claw 204 on the receptacle, as shown in Figure 2b-2. This locking portion has a locking groove 10101 extending in the insertion direction. The locking groove 10101 is located at the plug end of the first plug insulator 101 and extends through the plug end surface of the first plug insulator 101. The two side walls of the locking groove 10101 are provided with locking grooves 10102. When mated with a receptacle, the locking claw 204 on the receptacle engages with the locking grooves 10102.

[0052] An inner slide groove 10109 communicating with the locking groove 10101 and extending in the plugging direction is further provided on the upper portion of the first plug insulator 101. The two side walls of the inner slide groove 10109 are provided on inner slide rails 10107 extending in the plugging direction. A stop structure 10103 is provided at the end of the inner slide groove 10109 away from the plugging end. Outer slide grooves 10110 are provided on both sides of the inner slide groove 10109 on the upper portion of the first plug insulator 101. The side walls of the outer slide groove 10110 are provided on outer slide rails 10104 extending in the plugging direction. The sliding pressure plate 105 is simultaneously slidably disposed in the inner slide groove 10109 and the outer slide groove 10110, and slidably cooperates with the inner slide rail 10107 and the outer slide rail 10104. The slidably cooperated structure can be a slot-block structure, that is, the block on the sliding pressure plate 105 slides in the slots on the inner slide rail 10107 and the outer slide rail 10104, or the slot on the sliding pressure plate 105 wraps around and slides on the block on the inner slide rail 10107 and the outer slide rail 10104. Stops 10105 are provided at both ends of the outer slide rail 10104 and the inner slide rail 10107 to limit the movement range of the sliding pressure plate 105. The cooperation between the above-mentioned insulator and the sliding pressure plate 105 ensures the stability of the function of the sliding pressure plate 105 on the basis of the miniaturization of the connector. The locking function will not be unstable due to the reduction of the structure related to the locking function (including the inner slide groove 10109, the outer slide groove 10110, the inner slide rail 10107, the outer slide rail 10104, the locking groove 10101, and the card slot 10102) due to the small size of the connector. At the same time, the inner slide rail 10107 and the outer slide rail 10104 can prevent the sliding pressure plate 105 from being separated from the plug insulator during assembly, thereby achieving basic fixation.

[0053] External grooves 10110 are provided on either side of the first plug insulator 101. The lower portion of the sliding plate 105 mates with the external grooves 10110 and simultaneously slidably engages with the external rails 10104. In this embodiment, the side surfaces of the sliding plate 105 align with the side surfaces of the first plug insulator 101. This structure significantly reduces the width of the sliding plate 105, ensuring that the width of the sliding plate 105 is consistent with the width of the first plug insulator 101. This reduces the size of the connector and improves space utilization within the server where the connector is located.

[0054] The stop structure 10103 includes two parallel stops 10106 extending in the direction of insertion and toward the plug-in end. In other embodiments, one or more stops 10106 may also be provided. A channel 10502 is provided at the lower portion of the sliding plate 105, which mates with the inner slide groove 10109, and a cavity mates with the stop structure 10103 to accommodate the stop structure 10103. The channel 10502 extends in the direction of insertion and penetrates the sliding plate 105 at the end away from the plug-in end. A spring 106 is provided within the channel 10107, with one end of the spring 106 resting against the side wall of the channel 10107 near the plug-in end and the other end resting against the end face of the stop 10106.

[0055] Due to the miniaturization of the connector, spring 106 is small in size and diameter. When compressed, spring 106 may still deform due to factors such as processing errors within the spring 106 itself and errors in the connector structure, and even when subjected to relatively small forces. Therefore, even if the direction of the compressive force is aligned with the axis of spring 106 as closely as possible, it is still possible for spring 106 to be subjected to an external force that is not aligned with its axis, causing spring 106 to bend. When the spring 106 bends to a certain degree, it is likely to plastically deform or become stuck within the connector, preventing it from moving the sliding pressure plate 105 toward the plug end and thus preventing the sliding pressure plate 105 from performing its locking function. Therefore, in this embodiment, spring 106 is constrained within groove 10502 to prevent it from bending when subjected to other external forces. This ensures that when subjected to compressive forces, spring 106 is compressed only in the direction of groove 10502, preventing spring 105 failure caused by bending. At the same time, the groove 10502 and the stopper 10106 move in conjunction, and the stopper 10106 moves through the groove 10502, allowing the stopper 10106 to move along the direction in which the groove 10502 extends. As a result, when the sliding pressure plate 105 moves, a compressive force can be applied to the spring 106 along the direction in which the groove 10502 extends, limiting the direction in which the spring 106 is subjected to force and preventing the spring 106 from being affected by external forces. In other embodiments, the spring 106 may also be made of other elastic members, such as an elastic gasket superimposed in the direction in which it extends.

[0056] In other embodiments, a groove 10502 with an opening toward the plug-in end and extending in the plug-in direction can be provided on the stop structure 10103. The groove 10502 can be set as a blind hole, and the spring 106 is inserted in the blind hole. A stop 10106 extending in a direction away from the plug-in end is provided on the sliding pressure plate 105. The stop 10106 is slidably inserted in the blind hole. One end of the spring 106 abuts against the bottom surface of the blind hole, and the other end abuts against the end surface of the stop 10106. The above-mentioned technical effect of limiting the spring 106 can also be achieved.

[0057] In another embodiment, a stopper 10106 extending toward the plug-in end is provided on the stop structure 10103, the spring 106 is sleeved on the stopper, a groove 10502 is provided on the sliding pressure plate 105, the stopper 10106 moves through the groove 10502, one end of the spring 106 abuts against the stop end face 10111 of the stop structure 10103 close to the plug-in end, and the other end abuts against the end face of the sliding pressure plate 105 away from the plug-in end, and the spring 106 is limited by the stopper 10106.

[0058] In another embodiment, a stopper 10106 extending toward the plug-in end is provided on the stop structure 10103, and the stopper 10106 is slidably provided in the groove 10502 on the sliding pressure plate 105. One end portion of the spring 106 can be sleeved and fixed on the stopper 10106, and the other end is against the side wall of the groove 10502 close to the plug-in end. The spring 106 is entirely provided in the groove 10502 to limit the spring 106.

[0059] In another embodiment, when the overall structure of the connector is large, the spring 106 is large in size and not easily deformed, and the stop 10106 on the stop structure 10103 and the groove 10502 on the sliding pressure plate 105 can be cancelled. The sliding pressure plate 105 is slidably set on the first plug insulator 101, and the spring 106 is set between the stop structure 10103 and the sliding pressure plate 105. One end of the spring 106 abuts against the end face of the sliding pressure plate 105 away from the plug-in end, and the other end abuts against the end face of the stop structure 10103 close to the plug-in end.

[0060] A locking protrusion 10501 is provided at the end of the sliding pressure plate 105 near the plug-in end. When the locking claw 204 is inserted into the card slot 10102, the sliding pressure plate 105 slides toward the plug-in end under the elastic force of the spring 106, and the locking protrusion 10501 is inserted between the two claws 20401 of the locking claw 204. The locking protrusion 10501 is in a locking position to prevent the claw 20401 from moving out of the card slot 10102, thereby realizing the locking of the plug and the socket and ensuring the reliability of the connection in the wire-to-board scenario.

[0061] A pull strap 107 is provided at the end of the sliding pressure plate 105 away from the plug end. One end of the pull strap 107 is connected to the sliding pressure plate 105, and the other end is a handle for easy operation. When the plug and the socket are unlocked, the pull strap 107 is pulled, thereby moving the sliding pressure plate 105 in the direction opposite to the plugging direction, overcoming the elastic force of the spring 106. At this time, the stop 10106 cooperates with the groove 10107 to limit the spring 106, and the locking protrusion 10501 disengages the locking claw 204. The locking claw 204 is freed from the restriction of the locking protrusion 10501, and the plug end can be pulled out. Before plugging the plug into the socket, first pull the drawstring 107 in the direction opposite to the plugging direction to provide space for the locking claw 204 to insert into the locking groove 10101. Then, the locking claw 204 is inserted into the locking groove 10101, and the claw 20401 is locked into the locking groove 10102. Then, the drawstring 107 is released, and the sliding pressure plate 105 returns to its original position due to the release of the potential energy of the spring 106. The locking protrusion 10501 is locked between the locking claws 204, and the locking is completed. The drawstring 107 can be used to lock and unlock in a small space.

[0062] The sliding rails and stop structure 10103 on the inside and outside of the first plug insulator 101 cooperate with the sliding pressure plate 105 and its groove 10502 and the spring 106 to prevent the sliding pressure plate 105 from falling out. At the same time, it avoids the current situation where the stops, pull rods, insulators and locking structures of the same type of electrical connectors are used separately. No additional pull rod is required, which not only reduces the number of parts but also further reduces the size of the connector.

[0063] The first contact member installed in the first plug insulator 101 is a blade-type contact member, including a first contact member 102 and a first contact member 103, which are arranged symmetrically. The first contact members 102 and 103 are respectively inserted vertically into the mounting groove 10108 in the internal cavity of the first plug insulator 101 along the insertion direction. The first contact members 102 and 103 are respectively provided with a limit groove I 10201 and a limit groove II 10301, and the limit grooves extend perpendicular to the insertion direction. The inner cavity of the first plug insulator 101 is provided with a rib 112 that separates the two contacts. The rib 112 extends out of the cavity of the first plug insulator 101 and forms a guide structure at the end when the plug and socket are mated. The mounting groove 10108 extends out of the cavity of the first plug insulator 101 along with the rib 112. After inserting the two first contacts into their corresponding mounting slots 10108, plugs 104 are sequentially inserted into retaining slot I 10201, the holes in rib 112, and retaining slot II 10301 to achieve forward and backward positioning. When the wiring plug is plugged into the receptacle, the first contacts are inserted into the receptacle's receptacle structure. The tails of the first contacts are soldered to the cable 5, electrically connecting them to current transmission.

[0064] The structure of the solder plug is shown in Figure 3. It includes a second plug insulator 108, a second contact, and a plug block 104. The second contact is a blade-type contact and includes second contact members 109 and 110. The portion of the second contact member away from the plug end is bent into a U-shape to reduce the plug's size. The bent portion is provided with plug pins 111 extending perpendicular to the plugging direction. After the second contact member is installed, the plug pins 111 extend from the lower portion of the second plug insulator 108. The second contact member is installed in the second plug insulator 108 in the same manner as the first contact member. The second contact member is vertically inserted into the mounting slot within the cavity of the second plug insulator 108 and separated by a rib 112. The rib 112, mounting slot, and second contact member extend out of the cavity of the second plug insulator 108 to facilitate insertion into a socket. The plug block 104 restricts movement in the plugging direction, ensuring product reliability. The portion of the second contact away from the plug end is bent into a U-shaped structure, with a gap between the two sides of the U-shaped structure, leaving ample space for the installation of the plug 104. The front end of the second plug insulator 108 is plugged into the socket, and the lower end is welded to the PCB via the plug pins 111 of the second contact to form a flow passage. The upper portion of the second plug insulator 108 is provided with a cavity for mating with the locking claw 204. The structure of the locking claw 204 mating with the second plug insulator 108 is similar to the structure of the locking claw 204 mating with the first plug insulator 101. Because the soldering plate connector is welded to the PCB, no locking structure is required to ensure that the plug and socket do not move relative to each other. Therefore, the upper portion of the second plug insulator 108 only needs to be provided with a locking groove 10101 and a locking slot 10102 for the locking claw 204 to be inserted. In other embodiments, if the soldering board plug moves with the PCB board, in order to ensure that the plug is firmly engaged, the locking groove 10101, the card slot 10102, the inner slide groove 10109, the outer slide groove 10110, the inner slide rail 10107, the outer slide rail 10104, the stop platform 10105, the stop structure 10103, the sliding pressure plate 105 and other structures on the wiring plug can be set on the soldering board plug. The matching relationship between the above structure and the locking claw 204 is the same as the matching relationship between the wiring plug and the locking claw 204, ensuring that the soldering board plug is plugged and locked with the corresponding socket.

[0065] As shown in Figures 4a and 4b, the curved soldering plate socket 21 comprises a first socket insulator 201, a locking claw 204, and a first receptacle structure. The first receptacle structure comprises a first receptacle structure 202 and a first receptacle structure 203. The first receptacle structure is a sheet-like structure that is bent into a U-shape to reduce the length of the socket. The first receptacle structure R202 and the first receptacle structure L203 are symmetrically arranged within the first socket insulator 201. One side of the first receptacle structure is a plug-in end for mating with contacts in a plug. The plug-in ends of the first receptacle structures are arranged opposite each other, forming a receptacle structure that mates with the contacts in the plug. The contacts in the plug are inserted between the two receptacle structures. The other side of the first receptacle structure is a pin end for connecting to a PCB. A plurality of first receptacle pins 208 are distributed on the pin end, oriented perpendicularly to the direction of insertion. The front end of the first socket insulator 201 mates with the plug, while the lower end is soldered to the PCB via the first receptacle pins 208, creating a flow path. After the plug and the socket are plugged in, the first socket structure clamps the contact piece in the plug to transmit current.

[0066] Barb structures are provided on the upper and lower sides of the first plug-in hole structure 202 and the first plug-in hole structure 203 for vertically and forcibly mounting in the first socket insulator 201 .

[0067] The locking claw 204 is inserted into the first socket insulator 201 and comprises two claws 20401 extending in the direction of insertion. These claws 20401 are symmetrically arranged in the left-right direction. The claws 20401 are cantilever structures extending toward the plug end. The claws 20401 are provided with claw protrusions 20402 at their ends, with both claw protrusions 20402 facing outward. A space is left between the two claws 20401. When the plug and socket are mated, the claw protrusions 20402 engage the slots 10102 on the plug. The locking protrusion 10501 is inserted between the two claws 20401, preventing the claws 20401 from elastically deforming and dislodging from the plug, thereby locking the plug and socket. To ensure that the latching protrusion 20402 smoothly enters the latching slot 10102, the cross-section of the latching protrusion 20402 is trapezoidal, with the narrow side facing outward, and the shape of the latching slot 10102 matches that of the latching protrusion 20402. When the plug and socket are unlocked, the surfaces of the latching protrusion 20402 that match the latching slot 10102 in the separation direction are inclined, facilitating the latching protrusion 20402 to disengage from the latching slot 10102.

[0068] A mounting arm 20403 extending in the insertion direction is disposed between the two claws 20401 of the locking claw 204. A mounting protrusion 20404 is disposed on the upwardly facing end of the mounting arm 20403. A mounting hole 20101 is disposed at the top of the first socket insulator 201. When the locking claw 204 is inserted into the first socket insulator 201, the mounting protrusion 20404 on the mounting arm 20403 is subjected to pressure, causing the mounting arm 20403 to elastically deform. Once the locking claw 204 is in place, the mounting protrusion 20404 engages with the mounting hole 20101, and the mounting arm 20403 returns to its original shape, thereby securely inserting the locking claw 204 into the first socket insulator 101.

[0069] In other embodiments, a slot 10102 may be provided on the claw 20401 , and a claw protrusion 20402 may be provided on the side wall of the locking slot 10101 . When the claw 20401 is inserted, the claw 20401 undergoes elastic deformation, so that the claw protrusion 20402 is inserted into the slot 10102 .

[0070] As shown in Figures 5a and 5b, the vertical soldering plate socket 22 includes a second socket insulator 205, a locking claw 204, and a second receptacle structure. The locking claw 204 in the vertical soldering plate socket 22 has the same structure and installation method as the locking claw 204 in the curved soldering plate socket, and will not be further described here. The second receptacle structure is a sheet-type contact, which can reduce the size of the socket. The second receptacle structure includes symmetrically arranged second receptacle structures 206 and 207. The plug-in ends of the second receptacle structures 206 and 207 form a receptacle structure that mates with the contacts on the plug, and the contacts in the plug are vertically inserted between the two receptacle structures. The ends of the second receptacle structures 206 and 207, away from the plug-in ends, are provided with second receptacle pins 209 extending in the plug-in direction. The second receptacle pins 209 are connected to the vertical PCB. The front end of the second receptacle insulator 108 mates with the plug, and the rear end is welded to the PCB via the second receptacle pins 209 to form a flow passage.

[0071] Barbs are provided on the upper and lower sides of the second jack structures 206 and 207, and the second jack structures are fixed in the cavity of the second socket insulator 108 through vertical forced installation. In this embodiment, two spring claws 210 are distributed vertically for each second jack structure. To reduce the wobbling amount of the second jack structure, the cavity at the insertion entrance end of the second socket insulator 108 away from the insertion end is designed as a "day" shape, with a larger width on the upper and lower sides for facilitating the insertion of the spring claws 210 and a narrower width in the middle for limiting the second jack structure. When assembling the second jack structures 206 and 207, the upper and lower spring claws 210 enter from the wider upper and lower "mouths" of the "day" shape. After being assembled in place, the middle narrowing position of the cavity at the insertion entrance end of the second socket insulator 205 cooperates with the narrowest position of the second jack structure. The upper and lower parts of the second jack structure are matched and limited by the upper and lower parts of the cavity at the insertion entrance end of the second socket insulator 108 through barbs, and the middle part of the second jack structure is matched and limited by the middle part of the cavity at the insertion entrance section of the second socket insulator 108, thereby preventing the second jack structure from wobbling in the second socket insulator 108.

[0072] The application scenarios of the above four connectors are shown in FIGS. 6a to 6c, including two application scenarios of wire-to-board and board-to-board. The maximum current-carrying capacity of these four small-sized connectors can reach 40A in this scenario. In the wire-to-board application scenario, the cable 5 is connected to the wiring plug 11, and there are two choices for the socket that mates with the wiring plug 11, namely the bent type soldering board socket 21 and the vertical type soldering board socket 22. Among them, the bent type soldering board socket 21 is inserted into the horizontal PCB board 3, and the vertical type soldering board socket 22 is inserted into the vertical PCB board 4, which is convenient for adapting to various space scenarios when selecting the socket. The pins of the socket are soldered to the PCB board, thereby realizing the wire-to-board current transmission.

[0073] In the board-to-board application scenario, the pins of the soldering board plug 12 are connected to the horizontal PCB board 3, and the other end is inserted into the bent type soldering board socket 21. The pins of the bent type soldering board socket 21 are connected to another horizontal PCB board 3, thereby realizing the current transmission between boards. The bent type soldering board socket 21 can be inserted into the soldering board plug 12 or the wiring plug 11, and can realize the convenient switching between the wire-to-board and board-to-board application scenarios.

[0074] The small-sized high-current electrical connector and its matching socket of the present invention are small in volume, large in current-carrying capacity, and high in space utilization rate, which is beneficial to the miniaturization development of servers.

[0075] For the small-sized high-current electrical connector and its matching socket of the present invention, when the plug and socket are mated, the pull-ring locking structure is adopted, which not only ensures the reliability of the wire-to-board usage scenario but also facilitates unlocking in narrow space operations.

[0076] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and alterations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A small-volume, high-current electrical connector, comprising an insulator and a contact inserted in the insulator, characterized in that: The insulator is provided with a locking groove (10101) extending along the plug-in direction of the connector, and the locking groove (10101) is used to cooperate with the locking claw (204) on the adapter connector for locking. The insulator is also provided with a sliding pressure plate (105) that slides in the plug-in direction. When the locking claw on the adapter connector cooperates with the locking groove, the sliding pressure plate can slide to a locking position to prevent the locking claw on the adapter connector from escaping from the locking groove.

2. The small-volume, high-current electrical connector according to claim 1, characterized in that: The side wall of the locking groove is provided with a snap-fitting groove (10102).

3. The small-volume, high-current electrical connector according to claim 1, characterized in that: The insulator is provided with an elastic member which enables the sliding pressure plate (105) to have a tendency to move toward the plug-in end.

4. The small-volume, high-current electrical connector according to claim 3, characterized in that: A stop structure (10103) is provided at the end of the insulator away from the plug-in end, and a stop (10106) extending in the plug-in direction is provided on the side of the stop structure (10103) facing the plug-in end. A groove (10502) is provided on the side of the sliding pressure plate (105) away from the plug-in end, and the groove (10502) and the stop (10106) can move relative to each other. A spring (106) is provided in the groove (10502), one end of which abuts against the end face of the stop (10106) and the other end abuts against the side wall of the groove (10502) close to the plug-in end.

5. The small-volume, high-current electrical connector according to claim 1, characterized in that: The outer surface of the insulator is provided with an inner slide groove (10109) extending along the plug-in direction and connected to the locking groove (10101), and an outer slide groove (10110) located on both sides of the inner slide groove and extending along the plug-in direction. The side walls of the inner slide groove (10109) are provided with inner slide rails (10107) extending along the plug-in direction. The side walls of the outer slide groove (10110) are provided with outer slide rails (10104) extending along the plug-in direction. The sliding pressure plate (105) is slidably arranged in the inner slide groove (10109) and the outer slide groove (10110), and slidably cooperates with the outer slide rails (10104) and the inner slide rails (10107). A stopper (10105) for limiting the moving range of the sliding pressure plate is arranged on the inner slide rail and the outer slide rail. The sliding pressure plate cooperates with the outer slide groove so that the two side surfaces of the sliding pressure plate do not protrude from the two side surfaces of the insulator.

6. The small-volume, high-current electrical connector according to claim 1, characterized in that: The end of the sliding pressure plate (105) away from the plug-in end is connected to a drawstring (107).

7. The small-volume, high-current electrical connector according to claim 1, characterized in that: The insulator has a cavity extending along the plugging direction, and a mounting groove (10108) for inserting a contact piece is arranged in the cavity, and the contact piece is a sheet-type contact piece; the sheet-type contact piece is provided with a limiting groove (10201 / 10301) whose extending direction is perpendicular to the plugging direction, and after the sheet-type contact piece is inserted into the mounting groove (10108), a plug block (104) is inserted into the limiting groove, and the plug block (104) is simultaneously inserted and matched with the insulator.

8. The small-volume, high-current electrical connector according to claim 7, characterized in that: The portion of the sheet contact away from the plug-in end is bent, and a pin extending out of the insulator and connected to the PCB board is arranged at the bent portion.

9. An adapter connector for a small-volume, high-current electrical connector, comprising an insulator and a socket structure inserted in the insulator, characterized in that: A gap is reserved in the socket structure for inserting a corresponding connector, a locking claw (204) is inserted into the insulator, the locking claw (204) includes a claw (20401) extending in the plug-in direction, a claw protrusion (20402) for snap-fitting is provided on one side of the claw (20401), and a space is reserved on the other side.

10. The small-volume, high-current electrical connector adapter connector according to claim 9, characterized in that: The socket structure is a bent structure, one side of which is a spring claw in contact with the contact piece, and the other side is provided with a first socket pin (208) that passes through the insulator and is not parallel to the plugging direction, and the first socket pin is connected to the PCB board.

11. The small-volume, high-current electrical connector adapter connector according to claim 9, characterized in that: The plug-in end of the socket structure is a spring claw in contact with the contact piece, and a second socket pin (209) extending in a direction opposite to the plug-in direction is arranged on one side of the socket structure away from the plug-in end, and the second socket pin is connected to the PCB board.

12. The small-volume, high-current electrical connector adapter connector according to claim 11, characterized in that: The plug-in structure is forcibly installed in the cavity of the insulator through barbs, and the width of the cavity of the insulator at the insertion entrance end matches the thickness of the plug-in structure.

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