Direct insertion type plug, direct insertion type socket and electric connector

Abstract

The utility model relates to a direct-insertion type plug, a direct-insertion type socket and an electric connector. The direct-insertion type plug comprises a head shell, a head core, a contact pin, an elastic terminal and an unlocking piece, the unlocking piece is arranged in a square locking piece hole, a guide protrusion and a guide groove are in sliding fit, an upper limiting cavity and a core wire part are in sliding fit, and a lower limiting cavity and a metal core wire part are matched; the longitudinal seat plate is fixed with the terminal cavity wall plate, the bent elastic part is embedded with the notch, and the end part of the elastic terminal plate is attached to the terminal wall plate; the terminal cavity is embedded with the needle seat cavity, and the needle main body extends out through the needle hole; the head core is inserted into the head shell, the lower end of the unlocking piece is matched with the elastic terminal plate, and the clearance groove corresponds to the bent elastic part; and the unlocking piece is opposite to the notch. A direct insertion type socket comprises a socket shell, a socket core, a plug bush, an elastic terminal and an unlocking piece. Through the arrangement of the elastic terminal and the unlocking piece, the metal wire core of the core wire of the cable is directly inserted, the metal wire core and the terminal cavity are electrically and firmly connected through the elastic terminal, the work efficiency is high, and the metal wire core can be detached.

Description

Technical Field

[0001] The utility model relates to an electrical connector, especially a plug for a cable. Background Art

[0002] In the current prior art, Chinese Patent No. 202322893398.3, a connection structure of a D SUB connector, includes a D SUB connector and a cable. The cable has multiple core wires. The D SUB connector includes an insulating body, an insulating connecting body, and multiple conductive pins. The insulating body is provided with a partition part, and the partition part is provided with multiple partition slots. Each conductive pin is fixed on the insulating body, and the welding ends of each conductive pin are respectively accommodated in the respective partition slots of the partition part, and the welding ends of each conductive pin are respectively welded to the respective core wires of the cable. The insulating connecting body is connected to the insulating body, and the insulating connecting body and each partition slot respectively enclose multiple insulating wrapping holes, and each insulating wrapping hole respectively wraps the welding part of each conductive pin and each core wire. The problems are as follows: The welding ends of the conductive pins are respectively welded to the respective core wires of the cable, the welding efficiency is low, and it is easy to have poor welding and poor electrical conductivity. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a direct plug which has the characteristics of convenient connection with cable core wires and reliable performance.

[0004] The utility model is realized as follows: A direct plug, which is characterized in that it includes a head shell, a head core, pins, elastic terminals, and an unlocking member.

[0005] The top plate of the head shell is provided with a hole group. The hole group includes a circular core wire hole and a square lock member hole, and the intersection thereof constitutes a guiding groove. The circular core wire hole includes a core wire part and a metal core wire part and is arranged vertically.

[0006] The head core includes a pin seat cavity and a pin hole group, and the pin seat cavity and the pin holes are arranged vertically.

[0007] The pin includes a terminal cavity with an upper opening, a notch at the upper end of the terminal cavity, and a pin body. The notch is provided at one end of the terminal cavity, and the other end wall plate opposite to the notch serves as a terminal wall plate.

[0008] The elastic terminal includes a longitudinal seat plate, a bent elastic part, and an elastic terminal plate.

[0009] The unlocking member includes an upper limit plate, an upper limit cavity, a lower limit cavity, a guiding protrusion, a lower limit plate, and a clearance groove provided on one side.

[0010] The unlocking member is arranged in the square lock member hole, the upper limiting plate cooperates with the top plate of the head shell, and the lower limiting plate cooperates with the lower end surface of the circular core wire hole for stopping. The guiding protrusion and the guiding groove are in sliding fit, the upper limiting cavity and the core wire part are in sliding fit, and the lower limiting cavity and the metal core wire part are in fit; the longitudinal seat plate is fixed to the terminal cavity wall plate and the bending elastic part is engaged with the notch, and the end of the elastic terminal plate is attached to the terminal wall plate; the terminal cavity is engaged with the pin socket cavity, and the pin body extends out through the pin hole; the head core is inserted into the head shell, the lower end of the unlocking member cooperates with the elastic terminal plate, and the clearance groove corresponds to the bending elastic part; the unlocking member is opposite to the notch.

[0011] The special feature of the described straight plug is that: an arc-shaped recess is provided on the elastic terminal plate;

[0012] The lower end of the unlocking member is arc-shaped,

[0013] The lower end of the unlocking member is engaged with the arc-shaped recess.

[0014] The special feature of the described straight plug is that: the width of the square lock member hole is greater than the core wire diameter of the circular core wire hole.

[0015] The special feature of the described straight plug is that: one side of the terminal cavity is open, two buckle plates are provided on one end plate, and one buckle plate is provided on one side plate;

[0016] One side of the longitudinal seat plate is provided with a protrusion, and the other side is provided with a support plate;

[0017] The support plate and the lower end of the side plate are in supporting fit, the buckle plate is buckled with the longitudinal seat plate, and the protrusion is located between the two buckle plates.

[0018] The special feature of the described straight plug is that: the circumferential plate of the head shell includes two plate bodies, and locking holes are provided on the plate bodies,

[0019] Two axial grooves are provided on the head core, and locking blocks are provided in the grooves,

[0020] The plate body is engaged with the groove, and the locking block is engaged with the locking hole.

[0021] The special feature of a straight socket is that: it includes a socket shell, a socket core, a socket sleeve, an elastic terminal and an unlocking member,

[0022] Hole groups are provided on the top plate of the socket shell, the hole groups include a circular core wire hole and a square lock member hole and the intersection thereof forms a guiding groove, the circular core wire hole includes a core wire part and a metal core wire part and they are arranged up and down;

[0023] The socket core includes a pin socket cavity, a sleeve cavity and a pin hole group, and the pin socket cavity, the sleeve cavity and the pin hole are arranged from top to bottom;

[0024] The socket sleeve includes a terminal cavity with an upper opening, a notch at the upper end of the terminal cavity, and a sleeve body. The notch is provided at one end of the terminal cavity, and the other end wall opposite to the notch serves as the terminal wall plate;

[0025] The elastic terminal includes a longitudinal seat plate, a bent elastic part, and an elastic terminal plate;

[0026] The unlocking member includes an upper limiting plate, an upper limiting cavity, a lower limiting cavity, a guiding protrusion, a lower limiting plate, and a clearance groove provided on one side;

[0027] The unlocking member is arranged in a square locking member hole. The upper limiting plate cooperates with the top plate of the socket housing, and the lower limiting plate cooperates with the lower end surface of the circular core wire hole for positioning. The guiding protrusion is in sliding fit with the guiding groove, the upper limiting cavity is in sliding fit with the core wire part, and the lower limiting cavity is in fit with the metal core wire part; The longitudinal seat plate is fixed to the terminal cavity wall plate, the bent elastic part is fitted into the notch, and the end of the elastic terminal plate is attached to the terminal wall plate; The terminal cavity and the sleeve body are respectively fitted into the needle seat cavity and the sleeve cavity, and the sleeve body is opposite to the needle hole; The socket core is inserted into the socket housing, the lower end of the unlocking member cooperates with the elastic terminal plate, and the clearance groove corresponds to the bent elastic part; The unlocking member is opposite to the notch.

[0028] The special feature of the described straight plug socket is that: an arc-shaped concave position is provided on the elastic terminal plate;

[0029] The lower end of the unlocking member is arc-shaped,

[0030] The lower end of the unlocking member is fitted into the arc-shaped concave position.

[0031] The special feature of the described straight plug socket is that: the width of the square locking member hole is greater than the core wire diameter of the circular core wire hole.

[0032] The special feature of the described straight plug socket is that: one side of the terminal cavity is open, two buckles are provided on one end plate, and one buckle is provided on one side plate;

[0033] A protrusion is provided on one side of the longitudinal seat plate, and a support plate is provided on the other side;

[0034] The support plate is in supporting cooperation with the lower end of the side plate, the buckle is buckled with the longitudinal seat plate, and the protrusion is located between the two buckles.

[0035] The special feature of the described straight plug socket is that: the circumferential plate of the socket housing includes two plate bodies, and locking holes are provided on the plate bodies,

[0036] Two axially extending grooves are provided on the socket core, and locking blocks are provided in the grooves,

[0037] The plate body is fitted into the groove, and the locking block is fitted into the locking hole.

[0038] An electrical connector, characterized in that it includes the above-mentioned straight plug and the above-mentioned straight socket.

[0039] For a straight plug of the present utility model, the pins adopt such a structure, the arrangement of elastic terminals and unlocking parts, the metal wire cores of the core wires of the cable are directly inserted, the elastic terminals electrically connect the metal wire cores with the terminal cavity firmly, with high work efficiency, and the metal wire cores can be disassembled. Description of the Drawings

[0040] Figure 1 It is the front view of the present utility model.

[0041] Figure 2 It is Figure 1 The A-A view of

[0042] Figure 3 It is Figure 2 The B-B view of

[0043] Figure 4 It is one of the three-dimensional exploded views of the present utility model.

[0044] Figure 5 It is the second three-dimensional exploded view of the present utility model.

[0045] Figure 6 It is one of the partial three-dimensional exploded views of the present utility model.

[0046] Figure 7 It is the second partial three-dimensional exploded view of the present utility model.

[0047] Figure 8 It is the third partial three-dimensional exploded view of the present utility model.

[0048] Figure 9 It is the front view of the second embodiment of the present utility model.

[0049] Figure 10 It is Figure 9 The C-C view of

[0050] Figure 11 It is one of the three-dimensional exploded views of the second embodiment of the present utility model.

[0051] Figure 12 It is the second three-dimensional exploded view of the second embodiment of the present utility model.

[0052] Figure 13 It is the partial three-dimensional view of the second embodiment of the present utility model.

[0053] Figure 14 It is one of the partial three-dimensional exploded views of the second embodiment of the present utility model.

[0054] Figure 15 It is the second partial three-dimensional exploded view of the second embodiment of the present utility model. Specific Embodiment

[0055] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation of the present utility model.

[0056] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0057] Embodiment 1

[0058] As shown in Figure 1 , Figure 2 , Figure 3 , Figure 4 , a direct plug includes a head shell 1, a head core 2, a pin 3, an elastic terminal 4 and an unlocking member 5. The pin 3 and the elastic terminal 4 are made of conductive metal plates;

[0059] The head shell 1 is circular. On the top plate of the head shell 1, there are a group of holes located at the center and a group of holes distributed on the circumference. The group of holes includes a circular core wire hole 11 and a square lock member hole 12, and the intersection of them forms a guiding groove 13. The circular core wire hole 11 includes a core wire part 111 and a metal core wire part 112, and they are arranged up and down. The diameter of the core wire part 111 is larger than that of the metal core wire part 112;

[0060] The head core 2 is circular and includes a hollow upper-opening pin socket cavity 21 and a pin hole 22 provided at the center, and a group of pin socket cavities 21 and pin holes 22 evenly distributed on the circumference. The pin socket cavity 21 and the pin hole 22 are arranged up and down and communicate with each other. The pin socket cavity 21 is square, and the pin hole 22 is circular; The pin socket cavity 21 and the pin hole 22 are called the pin socket cavity and the pin hole group;

[0061] The pin 3 includes an upper-opening terminal cavity 31, a notch 32 at the upper end of the terminal cavity 31, and a pin body 33. The notch 32 is provided at one end of the terminal cavity 31, and the other end wall plate opposite to the notch 32 serves as a terminal wall plate 34;

[0062] The elastic terminal 4 includes a longitudinal seat plate 41, a bending elastic part 42 and an elastic terminal plate 43;

[0063] The unlocking member 5 includes an upper limit plate 51, an upper limit cavity 52, a lower limit cavity 53, a guiding protrusion 54, a lower limit plate 55, and a clearance groove 56 provided on one side;

[0064] The unlocking member 5 is arranged in the square lock member hole 12. The upper limit plate 51 cooperates with the top plate of the head shell 1, and the lower limit plate 55 cooperates with the lower end surface of the circular core wire hole for positioning. Or rather, the lower limit plate 55 cooperates with the lower end of the metal core wire portion 112 for positioning. The guiding protrusion 54 is in sliding fit with the guiding groove 13, the upper limit cavity 52 is in sliding fit with the core wire portion 111, and the lower limit cavity 53 is in fit with the metal core wire portion 112; The longitudinal seat plate 41 is fixed to the wall plate on the notch side of the terminal cavity 31, and the bending elastic portion 42 is fitted into the notch 32. The end of the elastic terminal plate 43 is in contact with the terminal wall plate 34, and there is an acute angle α between the elastic terminal plate 43 and the terminal wall plate 34, as Figure 2 shown; With such a design, it is prevented that the elastic terminal plate 43 moves upward, causing the metal core wire to become loose or detached, and the fixing is firm; The terminal cavity 31 is fitted with the pin socket cavity 21, and the pin body 33 extends out through the pin hole 22; The head core 2 is inserted into the head shell 1, the lower end of the unlocking member 5 cooperates with the elastic terminal plate 43, and the clearance groove 56 corresponds to the bending elastic portion 42; The unlocking member 5 is opposite to the notch 32;

[0065] With such a structure, as Figure 2 shown, the rotation direction is based on the device on the right side of Figure 2 ; The outer sheath of the core wire end of the cable is stripped to expose the metal core wire; Then it is inserted into the circular core wire hole 11, and the metal core wire drives the elastic terminal plate 43 to rotate counterclockwise. Then the core wire is fitted with the core wire portion 111, and the metal core wire is located between the end of the elastic terminal plate 43 and the terminal wall plate 34, thereby fixing the metal core wire;

[0066] When the core wire needs to be disassembled, press the unlocking member 5. The lower end of the unlocking member 5 drives the elastic terminal plate 43, and the upper stop plate 51 cooperates with the top plate of the head shell 1 for positioning; The elastic terminal plate 43 rotates counterclockwise, and the end of the elastic terminal plate 43 leaves the metal core wire. Then the core wire is pulled out; After the core wire is pulled out, the elastic terminal plate 43 rotates clockwise and the end is in contact with the terminal wall plate 34. The elastic terminal plate 43 drives the lower end of the unlocking member 5, and the unlocking member 5 moves upward. The lower limit plate 55 cooperates with the lower end of the metal core wire portion 112 for positioning. It can be seen from the above that the core wire can be conveniently disassembled and assembled without any tools.

[0067] It can also be that the head shell 1 and the head core 2 are square, the hole groups are arranged in a determinant pattern on the top plate of the head shell, and the pin socket cavity and the pin hole groups are arranged in a determinant pattern on the head core 2.

[0068] As a further improvement of the present utility model: An arc-shaped concave position 43 is provided on the elastic terminal plate 43;

[0069] The lower end of the unlocking member 5 is arc-shaped,

[0070] The lower end of the unlocking member 5 is engaged with the arc-shaped recess 431.

[0071] As a further improvement of the utility model: the width of the square lock member hole 12 is greater than the diameter of the core wire portion 111 of the circular core wire hole.

[0072] As a further improvement of the utility model: as Figure 4 、 Figure 7 shown, one side of the terminal cavity 31 is open, two buckle plates 311 are provided on one end plate, and one buckle plate 311 is provided on one side plate;

[0073] One side of the longitudinal seat plate 41 is provided with a protrusion 411, and the other side is provided with a support plate 412;

[0074] The support plate 412 is in supporting cooperation with the side plate, the buckle plate 311 is buckled with the longitudinal seat plate 41, and the protrusion 411 is located between the two buckle plates 311. With such a structure, the longitudinal seat plate is prevented from displacing relative to the terminal cavity 31, and the fixation is firm.

[0075] As a further improvement of the utility model: the circumferential plate of the head shell 1 includes two plate bodies 14, the plate bodies 14 are provided with locking holes 141, and the plate bodies 14 are arc-shaped;

[0076] Two axial slots 23 are provided on the head core 2, locking blocks 231 are provided in the slots 23, and the slots 23 are arc-shaped;

[0077] The plate body 14 is engaged with the slot 23, and the locking block 231 is engaged with the locking hole 141.

[0078] Embodiment 2

[0079] As Figure 9 、 Figure 10 、 Figure 11 、 Figure 12 shown, a direct plug socket includes a socket shell 6, a socket core 7, a socket sleeve 8, elastic terminals 4 and an unlocking member 5, and the socket sleeve 8 and the elastic terminals 4 are made of conductive metal plates;

[0080] The socket shell 6 is circular, the top plate of the socket shell 6 is provided with a central hole group and a circumferentially distributed hole group, the hole group includes a circular core wire hole 61 and a square lock member hole 62, and the intersection thereof forms a guide groove 63. The circular core wire hole 61 includes a core wire portion 611 and a metal core wire portion 612 and is arranged up and down, and the diameter of the core wire portion 611 is greater than the diameter of the metal core wire portion 612;

[0081] The seat core 7 is circular and includes a hollow upper-opening needle seat cavity 71, a sleeve cavity 72, and a needle hole 73 provided at the center, as well as needle seat cavities 71, sleeve cavities 72, and needle holes 73 evenly distributed on the circumference. The needle seat cavity 71, the sleeve cavity 72, and the needle hole 73 are arranged from top to bottom and communicate with each other. The needle seat cavity 71 is square, and the sleeve cavity 72 and the needle hole 73 are circular. The needle seat cavity 71, the sleeve cavity 72, and the needle hole 73 are referred to as the needle seat cavity, the sleeve cavity, and the needle hole group.

[0082] The socket 8 includes an upper-opening terminal cavity 81, a notch 82 at the upper end of the terminal cavity 81, and a socket body 83. The notch 82 is provided at one end of the terminal cavity 81, and the other end wall plate opposite to the notch 82 serves as the terminal wall plate 84.

[0083] The elastic terminal 4 includes a longitudinal seat plate 41, a bent elastic portion 42, and an elastic terminal plate 43.

[0084] The unlocking member 5 includes an upper limit plate 51, an upper limit cavity 52, a lower limit cavity 53, a guiding protrusion 54, a lower limit plate 55, and a clearance groove 56 provided on one side.

[0085] The unlocking member 5 is arranged in the square locking member hole 62. The upper limit plate 51 cooperates with the top plate of the seat shell 6, and the lower limit plate 55 cooperates with the lower end face of the circular core wire hole for positioning. Or rather, the lower limit plate 55 cooperates with the lower end of the metal core wire portion 612 for positioning. The guiding protrusion 54 is in sliding fit with the guiding groove 63, the upper limit cavity 52 is in sliding fit with the core wire portion 611, and the lower limit cavity 53 is in fit with the metal core wire portion 612. The longitudinal seat plate 41 is fixed to the wall plate on the notch side of the terminal cavity 81, the bent elastic portion 42 is fitted into the notch 82, and the end of the elastic terminal plate 43 is in contact with the terminal wall plate 84 with an acute angle α, as Figure 10 shown. With such a structure, it is prevented that the elastic terminal plate 43 slides upward along the terminal wall plate 84, resulting in insecure fixation of the metal core wire. The terminal cavity 81 is fitted with the needle seat cavity 71, the socket body 83 is fitted with the sleeve cavity 72 and is opposite to the needle hole 73. The seat core 7 is inserted into the seat shell 6, the lower end of the unlocking member 5 cooperates with the elastic terminal plate 43, and the clearance groove 56 corresponds to the bent elastic portion 42. The unlocking member 5 is opposite to the notch 82.

[0086] With such a structure, as Figure 10 shown, the rotation direction is based on the device on the right side of Figure 10 . The outer sheath of the core wire of the cable is stripped to expose the metal core wire. Then it is inserted into the circular core wire hole 11, and the metal core wire drives the elastic terminal plate 43 to rotate counterclockwise. Then the core wire is fitted with the core wire portion 611, and the metal core wire is located between the end of the elastic terminal plate 43 and the terminal wall plate 84, thereby fixing the metal core wire.

[0087] When the core wire needs to be disassembled, press the unlocking member 5. The lower end of the unlocking member 5 drives the elastic terminal plate 43, and the upper stop plate 51 cooperates with the top plate of the housing 6 for positioning; the elastic terminal plate 43 rotates counterclockwise, and the end of the elastic terminal plate 43 leaves the metal core wire, and then the core wire is pulled out; after the core wire is pulled out, the elastic terminal plate 43 rotates clockwise and the end fits with the terminal wall plate 84. The elastic terminal plate 43 drives the lower end of the unlocking member 5, and the unlocking member 5 moves upward, and the lower limit plate 55 cooperates with the lower end of the metal core wire part 612 for positioning. It can be seen from the above that the core wire is convenient to disassemble and install without any tools.

[0088] Or: The housing 6 and the seat core 7 are square, and the hole groups are arranged in a determinant pattern on the top plate of the housing; the pin socket cavity, the sleeve cavity and the pin hole groups are arranged in a determinant pattern on the seat core 7;

[0089] As a further improvement of the present invention: an arc-shaped recess 43 is provided on the elastic terminal plate 43;

[0090] The lower end of the unlocking member 5 is arc-shaped,

[0091] The lower end of the unlocking member 5 is fitted with the arc-shaped recess 431.

[0092] As a further improvement of the present invention: the width of the square locking member hole 62 is greater than the diameter of the core wire part 611 of the circular core wire hole.

[0093] As a further improvement of the present invention: as Figure 15 shown, one side of the terminal cavity 81 is open, and two buckles 811 are provided on one end plate and one buckle 811 is provided on one side plate;

[0094] A protrusion 411 is provided on one side of the longitudinal seat plate 41 and a support plate 412 is provided on the other side;

[0095] The support plate 412 is in supporting cooperation with the side plate, the buckle 811 is buckled with the longitudinal seat plate 41, and the protrusion 411 is located between the two buckles 811. With such a structure, the longitudinal seat plate is prevented from displacing relative to the terminal cavity 81, and the fixation is firm.

[0096] As a further improvement of the present invention: the circumferential plate of the housing 6 includes two plate bodies 64, locking holes 641 are provided on the plate bodies 64, and the plate bodies 64 are arc-shaped;

[0097] Two axially extending grooves 74 are provided on the seat core 7, locking blocks 741 are provided in the grooves 74, and the grooves 74 are arc-shaped;

[0098] The plate body 64 is fitted with the groove 74, and the locking block 741 is fitted with the locking hole 641.

[0099] An electrical connector includes the straight plug as described above and the straight socket as described above.

[0100] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A direct plug-in type plug, characterized in that: It includes a head shell, a head core, a pin, an elastic terminal and an unlocking member. On the top plate of the head shell, there is a hole group, which includes a circular core wire hole and a square locking member hole, and the intersection of them forms a guiding groove. The circular core wire hole includes a core wire part and a metal core wire part, and they are arranged vertically. The head core includes a pin seat cavity and a pin hole group, and the pin seat cavity and the pin hole are arranged vertically. The pin includes a terminal cavity with an upper opening, a notch at the upper end of the terminal cavity and a pin body. The notch is located at one end of the terminal cavity, and the other end wall opposite to the notch serves as the terminal wall. The elastic terminal includes a longitudinal seat plate, a bending elastic part and an elastic terminal plate. The unlocking member includes an upper limiting plate, an upper limiting cavity, a lower limiting cavity, a guiding protrusion, a lower limiting plate and a clearance groove provided on one side. The unlocking member is arranged in the square locking member hole. The upper limiting plate cooperates with the top plate of the head shell, and the lower limiting plate cooperates with the lower end face of the circular core wire hole for positioning. The guiding protrusion is in sliding fit with the guiding groove, the upper limiting cavity is in sliding fit with the core wire part, and the lower limiting cavity is in fit with the metal core wire part. The longitudinal seat plate is fixed to the terminal cavity wall, and the bending elastic part is fitted into the notch. The end of the elastic terminal plate is attached to the terminal wall. The terminal cavity is fitted into the pin seat cavity, and the pin body extends out through the pin hole. The head core is inserted into the head shell. The lower end of the unlocking member cooperates with the elastic terminal plate, and the clearance groove corresponds to the bending elastic part. The unlocking member is opposite to the notch.

2. The straight plug according to claim 1, wherein: There is an arc-shaped recess on the elastic terminal plate. The lower end of the unlocking member is arc-shaped. The lower end of the unlocking member is fitted into the arc-shaped recess.

3. The straight plug according to claim 1, wherein: One side of the terminal cavity is open, and there are two buckles on one end plate and one buckle on one side plate. There is a protrusion on one side of the longitudinal seat plate and a support plate on the other side. The support plate is in supporting cooperation with the lower end of the side plate, the buckle is buckled with the longitudinal seat plate, and the protrusion is located between the two buckles.

4. A direct plug according to claim 1, characterized in that: The circumferential plate of the head shell includes two plate bodies, and there are locking holes on the plate bodies. There are two axially arranged grooves on the head core, and locking blocks are arranged in the grooves. The plate body is fitted into the groove, and the locking block is fitted into the locking hole.

5. A direct plug-in socket, characterized in that: It includes a seat shell, a seat core, a socket, an elastic terminal and an unlocking member. On the top plate of the seat shell, there is a hole group, which includes a circular core wire hole and a square locking member hole, and the intersection of them forms a guiding groove. The circular core wire hole includes a core wire part and a metal core wire part, and they are arranged vertically. The seat core includes a pin seat cavity, a socket cavity and a pin hole group, and the pin seat cavity, the socket cavity and the pin hole are arranged from top to bottom. The socket includes a terminal cavity with an upper opening, a notch at the upper end of the terminal cavity and a socket body. The notch is located at one end of the terminal cavity, and the other end wall opposite to the notch serves as the terminal wall. The elastic terminal includes a longitudinal seat plate, a bending elastic part and an elastic terminal plate. The unlocking member includes an upper limiting plate, an upper limiting cavity, a lower limiting cavity, a guiding protrusion, a lower limiting plate and a clearance groove provided on one side. The unlocking member is arranged in the square lock member hole, the upper limit plate is matched with the top plate of the seat shell, and the lower limit plate is matched with the lower end surface of the circular core wire hole for positioning. The guiding protrusion is in sliding fit with the guiding groove, the upper limit cavity is in sliding fit with the core wire part, and the lower limit cavity is in fit with the metal core wire part; The longitudinal seat plate is fixed to the terminal cavity wall plate, and the bending elastic part is fitted into the notch, and the end of the elastic terminal plate is attached to the terminal wall plate; The terminal cavity and the sleeve body are respectively fitted into the pin socket cavity and the sleeve cavity, and the sleeve body is opposite to the pin hole; The seat core is inserted into the seat shell, the lower end of the unlocking member is matched with the elastic terminal plate, and the clearance groove corresponds to the bending elastic part; The unlocking member is opposite to the notch.

6. The direct plug-in socket according to claim 5, wherein: An arc-shaped recess is provided on the elastic terminal plate; The lower end of the unlocking member is arc-shaped, The lower end of the unlocking member is fitted into the arc-shaped recess.

7. The direct plug-in socket according to claim 5, characterized in that: One side of the terminal cavity is open, and two buckle plates are provided on one end plate and one buckle plate is provided on one side plate side; One side of the longitudinal seat plate is provided with a protrusion and the other side is provided with a support plate; The support plate is in supporting fit with the lower end of the side plate, the buckle plate is buckled with the longitudinal seat plate, and the protrusion is located between the two buckle plates.

8. The direct plug-in socket according to claim 5, wherein: The circumferential plate of the seat shell includes two plate bodies, and locking holes are provided on the plate bodies, Two axially extending grooves are provided on the seat core, and locking blocks are provided in the grooves, The plate body is fitted into the groove, and the locking block is fitted into the locking hole.

9. An electrical connector, characterized in that: Including the straight plug according to any one of claims 1-4 and the straight socket according to any one of claims 5-8.

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