Locking device of plug connector

Abstract

The utility model discloses a locking device of a plug connector, which is characterized in that when a plugging part on a plug is plugged in a plugging accommodating cavity of a socket, at least two first buckle structures on the socket are buckled and connected with at least two second buckle structures on the plug, and a pressing piece capable of moving within a set range is arranged on the outer side wall of the plug; at least two pressing contacts on the pressing piece are opposite to the second buckle structures one by one, the pressing piece moves to trigger the second buckle structures to be released from the first buckle structure through the pressing contacts, and the plug can provide elastic reset force for the pressing piece so that the pressing piece can keep the pressing contacts to be separated from the second buckle structures in the triggering state when no external force exists. According to the utility model, the locking force of the buckle is effectively improved, the locking effect and the plugging safety of the plugging type connector are improved, the overall size of a product is effectively reduced, and the installation space of an electrical product is saved.

Description

Technical Field

[0001] The utility model relates to a plug-in connector, in particular to a locking device of the plug-in connector. Background Art

[0002] The plug-in connector is composed of a plug and a socket. The plug and the socket are plugged together to realize the clamping and docking of the conductive clip in the plug and the conductive plug in the socket. In order to ensure that the plug and the socket are in a stable state after being plugged together and avoid being disengaged by external force, a locking device needs to be provided on the plug and the socket to fix the two in position. The traditional plug-in connector locking device structure mostly uses screws to lock on both sides of the plug and the socket to realize the fixed connection between the plug and the socket. The screw locking needs to be twisted with a screwdriver, and the installation efficiency is low. At present, the plug-in connector locking device structure also uses a snap lock, but the snaps are mostly single-point, the locking force of the snaps is not strong enough, and the safety is relatively low. Utility Model Content

[0003] In order to overcome the above-mentioned defects, the utility model provides a locking device of a plug-in connector, which can provide a larger snap-on locking force, thereby increasing the locking effect and plug-in safety of the plug-in connector.

[0004] The utility model adopts a technical solution to solve the technical problem: a locking device of a plug-in connector, comprising a plug and a socket, wherein the plug is provided with a plurality of plug-in parts, and the socket is provided with a plurality of plug-in accommodating cavities with open groove structures, wherein the plug-in parts on the plug can be plugged into the plug-in accommodating cavities of the socket one by one to realize electrical connection and conduction, wherein the socket is provided with at least two first buckle structures, and the plug is provided with at least two second buckle structures, wherein the first buckle structure is connected with the second buckle structure as the plug-in parts on the plug are inserted into the plug-in accommodating cavities of the socket. The snap-fit ​​structure is snap-fitted and connected, and a pressing piece is installed on the outer wall of the plug so as to be able to move within a set range. The pressing piece is provided with at least two pressing contacts, and each pressing contact is directly opposite to the second snap-fit ​​structure. The movement of the pressing piece on the outer wall of the plug can drive each pressing contact to move synchronously and thereby trigger the second snap-fit ​​structure to disengage from the first snap-fit ​​structure. An elastic reset mechanism is also provided on the plug, which can provide an elastic reset force to the pressing piece so that the pressing piece keeps the pressing contact and the second snap-fit ​​structure out of the trigger state when no external force is applied.

[0005] As a further improvement of the present invention, the first buckle structure on the socket includes a buckle accommodating cavity provided on the socket and a buckle groove provided on the side wall of the buckle accommodating cavity, and the second buckle structure on the plug includes a buckle body and an elastic buckle provided on the buckle body. The buckle body of the second buckle structure can be inserted into the hook accommodating cavity of the first buckle structure synchronously with the plug being inserted into the socket, and the elastic buckle on the buckle body can be elastically contracted when blocked by the side wall of the buckle accommodating cavity. When the elastic hook on the buckle body is facing the buckle groove on the hook accommodating cavity, it can pop up and be inserted into the buckle groove, and the pressing contact on the pressing member can drive the elastic hook to elastically contract and exit the hook accommodating cavity.

[0006] As a further improvement of the utility model, the elastic hook includes an elastic cantilever structure arranged on the side wall of the buckle body and an inverted protrusion arranged on the side wall of the elastic cantilever structure. The elastic cantilever structure can be inserted into the hook accommodating cavity synchronously with the buckle body, and the pressing contact on the pressing member can press the elastic cantilever side wall to elastically deform the elastic cantilever structure.

[0007] As a further improvement of the present invention, the root of the elastic cantilever structure is located on the side wall of one end of the buckle body facing the socket, and the free end of the elastic cantilever structure extends away from the socket. The pressing contact on the pressing member can drive the free end of the elastic cantilever structure to swing so that the inverted protrusion on it exits the slot on the hook accommodating cavity.

[0008] As a further improvement of the present invention, a press positioning slot is provided on the plug, and the pressing piece also includes a fixed arm, an elastic arm and a pressing plate. The fixed arm is fixedly inserted in the press positioning slot, and the elastic arm can be elastically swung and installed on the fixed arm at a set angle. The pressing plate and the pressing contact are both fixedly connected to the elastic arm, and the pressing plate extends out of the outer side of the outer wall of the plug. A pressing portion for pressing by a finger is formed on the surface of the pressing plate. Pressing the pressing plate can drive the elastic arm to swing elastically and then drive the pressing contact to swing synchronously. The elastic arm forms an elastic reset mechanism.

[0009] As a further improvement of the utility model, two push-to-position slots are provided on the plug at intervals along the arrangement direction of the plug-in part, and two fixed arms are fixedly inserted in the push-to-position slots respectively and correspondingly. An elastic arm is provided on each fixed arm, and both ends of the pressing plate are fixedly connected to the two elastic arms respectively, and at least two pressing contacts are fixedly provided on the pressing plate at intervals.

[0010] As a further improvement of the present invention, a positioning opening is provided on the side wall of the push-positioning slot, and the fixed arm and the elastic arm of the pressing piece form a U-shaped structure, and the fixed arm and the elastic arm are both inserted into the push-positioning slot, the bottom of the U-shaped structure formed at one end of the fixed arm, and one end of the fixed arm is tightly against the bottom surface of the push-positioning slot, the side of the fixed arm facing away from the elastic arm is tightly against one side wall of the push-positioning slot, and the side of the elastic arm facing away from the fixed arm is elastically tightly against the other side wall of the push-positioning slot, and an inverted clamping point is provided on the side wall of the fixed arm, and the inverted clamping point is clamped in the positioning opening to realize fixed positioning of the fixed arm in the push-positioning slot, and the elastic arm can elastically swing toward the direction of the fixed arm in the push-positioning slot.

[0011] As a further improvement of the present invention, a limiting protrusion is provided on the free end of the elastic arm toward the fixed arm, and the limiting protrusion can press against a side wall of the positioning slot after the elastic arm swings to a set angle.

[0012] As a further improvement of the utility model, at least two contact accommodating grooves with U-shaped groove structures are provided on the plug at intervals along the arrangement direction of the plug-in part. The pressing contact can be swingably accommodated in the contact accommodating groove. The pressing plate covers the outer side of the opening of the contact accommodating groove. The pressing contact is integrally formed on the surface of the pressing plate facing the contact accommodating groove. The free end of the elastic cantilever structure of the elastic hook can also be swingably accommodated in the contact accommodating groove at a set angle.

[0013] As a further improvement of the present utility model, the plug includes an upper insulating body, a lower insulating body and a conductive component, the upper insulating body is formed with an upper conductive accommodating cavity with an opening at the lower end, the lower insulating body is formed with a lower conductive accommodating cavity with an opening at the upper end, the upper end of the lower insulating body is inserted into the inner side of the upper conductive accommodating cavity, the side wall of the upper conductive accommodating cavity is provided with an open card slot, the outer side wall of the upper end of the lower insulating body is provided with a positioning buckle, the positioning buckle is buckled and fixedly connected with the open card slot, the two ends of the conductive component respectively form a wiring terminal and a plug-in conductive end, the wiring terminal of the conductive component is accommodated in the upper conductive accommodating cavity in the upper insulating body, and the plug-in conductive end of the conductive component is accommodated in the lower conductive accommodating cavity in the lower insulating body, the press positioning slot and the contact accommodating groove are both arranged in the middle area of ​​the side wall of the upper insulating body, and are interspersed between adjacent upper conductive accommodating cavities, and the elastic hook is arranged in the middle area of ​​the side wall of the lower insulating body, and is interspersed between adjacent lower conductive accommodating cavities.

[0014] The beneficial effects of the utility model are as follows: the utility model sets at least two first buckle structures and second buckle structures on the socket and the plug, respectively, so that the plug-in lock of the plug and the socket is multi-point buckled, effectively improving the buckle locking force, increasing the locking effect and plug-in safety of the plug-in connector, and when unlocking, the application drives at least two pressing contacts synchronously by operating the pressing member, so that multiple second buckle structures are disengaged from multiple first buckle structures at the same time, and the unlocking operation is convenient, and the first buckle structure and the second buckle structure of the application are both located in the middle of the side of the product, and most of them are hidden inside the product, saving space for installing the lock of the product, effectively reducing the overall size of the product, and saving installation space for electrical products. The application designs both the pressing member and the buckle structure in the middle of the side wall of the product, which is also convenient for the balance of the product when plugging and unplugging, and convenient for operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a three-dimensional diagram of the plug and socket of the utility model in the plugged state;

[0016] Figure 2 This is a three-dimensional diagram of the plug and socket of the utility model in a separated state;

[0017] Figure 3 It is a three-dimensional cross-sectional view of the plug and the socket of the utility model in a locked state;

[0018] Figure 4 This is a cross-sectional view of the plug and socket of the utility model in a locked state;

[0019] Figure 5 This is a cross-sectional view of the plug and socket of the utility model in a separated state;

[0020] Figure 6 It is a three-dimensional diagram of the upper insulating body of the utility model;

[0021] Figure 7 This is a first stereoscopic view of the pressing member of the utility model;

[0022] Figure 8 This is a second stereoscopic view of the pressing member of the utility model;

[0023] Fig. 9 It is a three-dimensional diagram of the lower insulating body of the utility model;

[0024] Fig.10 It is a three-dimensional cross-sectional view of the lower insulating body of the utility model. DETAILED DESCRIPTION

[0025] Embodiment: A locking device for a plug connector comprises a plug 1 and a socket 2, wherein the plug 1 is provided with a plurality of plug-in portions 11, and the socket 2 is provided with a plurality of plug-in accommodating cavities 21 with open groove structures, wherein the plug-in portions 11 on the plug 1 can be plugged into the plug-in accommodating cavities 21 of the socket 2 one by one to realize electrical connection and conduction, wherein the socket 2 is provided with at least two first buckle structures, and the plug 1 is provided with at least two second buckle structures, wherein the first buckle structures are buckled and connected with the second buckle structures as the plug-in portions 11 on the plug 1 are inserted into the plug-in accommodating cavities 21 of the socket 2 A pressing piece 3 is installed on the outer wall of the plug 1 so as to be movable within a set range. The pressing piece 3 is provided with at least two pressing contacts 35, and each pressing contact 35 is directly opposite to the second buckle structure. The movement of the pressing piece 3 on the outer wall of the plug 1 can drive each pressing contact 35 to move synchronously and thus trigger the second buckle structure to disengage from the first buckle structure. An elastic reset mechanism is also provided on the plug 1, which can provide an elastic reset force to the pressing piece 3 so that the pressing piece 3 keeps the pressing contact 35 and the second buckle structure out of the trigger state when no external force is applied.

[0026] The first buckle structure on the socket 2 includes a buckle accommodating cavity 22 provided on the socket 2 and a buckle groove 23 provided on the side wall of the buckle accommodating cavity. The second buckle structure on the plug 1 includes a buckle body 134 and an elastic buckle provided on the buckle body 134. The buckle body 134 of the second buckle structure can be inserted into the buckle accommodating cavity of the first buckle structure synchronously with the plug 1 being inserted into the socket 2. The elastic buckle on the buckle body 134 can be elastically contracted when blocked by the side wall of the buckle accommodating cavity. When the elastic hook on the buckle body 134 is facing the buckle groove 23 on the buckle accommodating cavity 22, it can pop up and be inserted into the buckle groove 23. The pressing contact 35 on the pressing member 3 can drive the elastic hook to elastically contract and exit the hook accommodating cavity 22.

[0027] When the connector 11 on the plug 1 is inserted into the plug-in and unplugging accommodating cavity 21 on the socket 2, the buckle body 134 on the plug 1 moves together with the plug 1 and then inserted into the hook accommodating cavity in the socket 2. The elastic hook on the buckle body 134 is blocked by the side wall of the buckle accommodating cavity and can be elastically contracted. The elastic hook on the buckle body 134 contacts the edge of the open end of the hook accommodating cavity 22 and elastically contracts under pressure. When the plug 1 is plugged in place, the elastic hook just faces the slot 23 on the hook accommodating cavity 22. At this time, the elastic hook automatically pops up and inserts into the slot 23. At this time, the plug 1 and the socket 2 are firmly buckled and positioned together. When unlocking, the pressing piece 3 on the side wall of the plug 1 is operated to make the pressing contact 35 on it move synchronously. The pressing contact 35 drives the elastic hook to elastically contract and exit the hook accommodating cavity 22. At this time, the plug 1 can be easily pulled out from the socket 2.

[0028] The elastic hook comprises an elastic cantilever structure 131 provided on the side wall of the buckle body 134 and an undercut protrusion 132 provided on the side wall of the elastic cantilever structure 131. The elastic cantilever structure 131 can be inserted into the hook receiving cavity 22 together with the buckle body 134. The pressing contact 35 on the pressing member 3 can press the elastic cantilever side wall to elastically deform the elastic cantilever structure 131. When the elastic hook is inserted into the hook receiving cavity 22 on the side wall of the socket 2, the undercut protrusion 132 contacts the opening edge of the hook receiving cavity 22 through the inclined surface, so that the elastic hook is smoothly inserted into the hook receiving cavity 22. After being inserted into place, the undercut protrusion 132 contacts the side wall of the slot 23 on the side wall of the hook receiving cavity 22 through the vertical surface, so as to achieve stable blocking positioning. The slot 23 on the side wall of the hook receiving cavity 22 can be a groove structure or a hollow structure.

[0029] The root of the elastic cantilever structure 131 is located on the side wall of one end of the buckle body 134 facing the socket 2, and the free end of the elastic cantilever structure 131 extends in the direction away from the socket 2. The pressing contact 35 on the pressing member 3 can drive the free end of the elastic cantilever structure 131 to swing so that the inverted protrusion 132 on it withdraws from the slot 23 on the hook accommodating cavity 22.

[0030] The root of the elastic cantilever structure 131 is arranged on the side wall of the buckle body 134 at one end facing the socket 2. When the buckle body 134 is inserted into the hook receiving cavity 22 on the socket 2, it can ensure that the elastic cantilever structure 131 is smoothly inserted into the hook receiving cavity 22 without interference, and it can ensure that the undercut protrusion 132 on the elastic cantilever structure 131 can be stably inserted into the card slot 23 on the hook receiving cavity 22. The elastic cantilever structure 131 can also be an arc-shaped spring sheet installed on the side wall of the buckle body 134, or an elastic sliding pin installed on the side wall of the buckle body 134. These are equivalent replacement structures that can be easily thought of by those skilled in the art after seeing this application, and they all belong to the protection scope of this application.

[0031] The plug 1 is provided with a press positioning slot, and the pressing member 3 also includes a fixed arm 34, an elastic arm 32 and a pressing plate 31. The fixed arm 34 is fixedly inserted in the press positioning slot, and the elastic arm 32 can be elastically swung and installed on the fixed arm 34 at a set angle. The pressing plate 31 and the pressing contact 35 are both fixedly connected to the elastic arm 32. The pressing plate 31 extends out of the outer side of the outer wall of the plug 1, and a pressing portion for pressing by a finger is formed on the surface of the pressing plate 31. Pressing the pressing plate 31 can drive the elastic arm 32 to swing elastically and then drive the pressing contact 35 to swing synchronously. The elastic arm 32 forms an elastic reset mechanism.

[0032] The pressing member 3 is fixedly installed in the pressing positioning slot on the side wall of the plug 1 through the fixing arm 34. The pressing plate 31 is connected to the elastic arm 32. The elastic arm 32 provides an elastic reset force to the pressing plate 31. Pressing the pressing plate 31 can drive the pressing contact 35 to swing together with the elastic arm 32, and then the pressing contact 35 presses against the elastic cantilever side wall of the elastic hook to elastically deform it. After releasing the pressing plate 31, under the elastic force of the elastic arm 32, the pressing contact 35 automatically resets in the opposite direction, so that the elastic cantilever of the elastic hook also automatically resets. The above structure is simple, and all parts can automatically reset elastically, thereby avoiding the situation that the elastic hook does not reset elastically after releasing the pressing plate 31, resulting in the plug 1 and the socket 2 being unable to automatically lock when they are plugged in again.

[0033] The plug 1 is provided with two press positioning slots at intervals along the arrangement direction of the plug part 11, and two fixed arms 34 are fixedly inserted in the press positioning slots in a one-to-one correspondence. Each fixed arm 34 is provided with an elastic arm 32, and both ends of the press plate 31 are fixedly connected to the two elastic arms 32, and at least two press contacts 35 are fixedly provided on the press plate 31 at intervals. The above structure can make each press contact 35 move synchronously when the press plate 31 is pressed.

[0034] A positioning hole 141 is provided on the side wall of the push positioning slot, and the fixed arm 34 and the elastic arm 32 of the pressing member 3 form a U-shaped structure, and the fixed arm 34 and the elastic arm 32 are both inserted into the push positioning slot, and the bottom of the U-shaped structure formed at one end of the fixed arm 34, and one end of the fixed arm 34 is tightly against the bottom surface of the push positioning slot, and the side of the fixed arm 34 facing away from the elastic arm 32 is tightly against one side wall of the push positioning slot, and the side of the elastic arm 32 facing away from the fixed arm 34 is elastically tightly against the other side wall of the press positioning slot, and an inverted clamping point 33 is provided on the side wall of the fixed arm 34, and the inverted clamping point 33 is clamped in the positioning hole 141 to realize the fixed positioning of the fixed arm 34 in the push positioning slot, and the elastic arm 32 can elastically swing toward the fixed arm 34 in the press positioning slot. The fixed arm 34 and the undercut point 33 thereon are plugged and snapped into the press positioning slot of the plug 1 to achieve the positioning of the pressing member 3 on the side wall of the plug 1, and the elastic arm 32 swings elastically around the arc opening structure 37 connected to the fixed arm 34.

[0035] The free end of the elastic arm 32 is provided with a limiting protrusion 36 toward the fixed arm 34, and the limiting protrusion 36 can press against a side wall of the positioning slot after the elastic arm 32 swings to a set angle. The limiting protrusion 36 can limit the swing angle of the elastic arm 32 to prevent it from being damaged by excessive swing angle.

[0036] At least two contact receiving grooves 142 with U-shaped groove structures are provided on the plug 1 at intervals along the arrangement direction of the plug part 11. The pressing contact 35 can be swingably received in the contact receiving groove 142. The pressing plate 31 covers the outside of the opening of the contact receiving groove 142. The pressing contact 35 is integrally formed on the surface of the pressing plate 31 facing the contact receiving groove 142. The free end of the elastic cantilever structure 131 of the elastic hook can also be swingably received in the contact receiving groove 142 at a set angle. After assembly, the free end of the elastic cantilever structure 131 of the elastic hook extends into the contact receiving groove 142, which is convenient for being triggered by the pressing contact 35. The contact receiving groove 142 is covered by the pressing plate 31 to avoid being accidentally touched.

[0037] The plug 1 includes an upper insulating body 14, a lower insulating body 13 and a conductive component 12. The upper insulating body 14 is formed with an upper conductive accommodating cavity 143 with an opening at the lower end, and the lower insulating body 13 is formed with a lower conductive accommodating cavity 135 with an opening at the upper end. The upper end of the lower insulating body 13 is inserted into the inner side of the upper conductive accommodating cavity 143. The side wall of the upper conductive accommodating cavity 143 is provided with an open card slot 144. The outer side wall of the upper end of the lower insulating body 13 is provided with a positioning buckle 136. The positioning buckle 136 is buckled and fixedly connected with the open card slot 144. The conductive component 12 is provided with a positioning buckle 136. The two ends of the electrical component 12 form a wiring terminal and a plug-in conductive end respectively. The wiring terminal of the conductive component 12 is accommodated in the upper conductive accommodating cavity 143 in the upper insulating body 14, and the plug-in conductive end of the conductive component 12 is accommodated in the lower conductive accommodating cavity 135 in the lower insulating body 13. The press-positioning slot and the contact accommodating groove 142 are both arranged in the middle area of ​​the side wall of the upper insulating body 14, and are interspersed between adjacent upper conductive accommodating cavities 143. The elastic hook is arranged in the middle area of ​​the side wall of the lower insulating body 13, and is interspersed between adjacent lower conductive accommodating cavities.

[0038] The insulating shell of the plug 1 is made into a split structure, which is convenient for processing, manufacturing and assembly. The pressing piece 3 and the second snap-fit ​​structure are arranged in the middle area of ​​the plug 1 along the arrangement direction of the plug-in part, and the first snap-fit ​​structure is arranged in the middle area of ​​the socket 2 along the arrangement direction of the plug-in accommodating cavity 21, so that the locking device is located in the middle part of the connector, which is convenient for balance when the product is plugged in and out, and convenient for operation.

Claims

1. A locking device for a plug connector, comprising a plug (1) and a socket (2), wherein the plug is provided with a plurality of plug-in parts (11), and the socket is provided with a plurality of plug-in accommodating cavities (21) with open groove structures, wherein the plug-in parts on the plug can be plugged into the plug-in accommodating cavities of the socket in a one-to-one correspondence to realize electrical connection and conduction, and wherein: The socket is provided with at least two first snap-in structures, and the plug is provided with at least two second snap-in structures. The first snap-in structures are snap-connected with the second snap-in structures when the plug-in portion on the plug is inserted into the plug-in and pull-out accommodating cavity of the socket. A pressing piece (3) is installed on the outer wall of the plug so as to be movable within a set range. The pressing piece is provided with at least two pressing contacts (35), each of which is directly opposite to the second snap-in structures. The movement of the pressing piece on the outer wall of the plug can drive each of the pressing contacts to move synchronously, thereby triggering the second snap-in structure to disengage from the first snap-in structure. The plug is also provided with an elastic reset mechanism, which can provide an elastic reset force to the pressing piece so that the pressing piece keeps the pressing contact and the second snap-in structure out of the trigger state when no external force is applied.

2. The locking device of the plug connector according to claim 1, characterized in that: The first buckle structure on the socket comprises a buckle accommodating cavity (22) provided on the socket and a buckle groove (23) provided on the side wall of the buckle accommodating cavity, and the second buckle structure on the plug comprises a buckle body (134) and an elastic buckle provided on the buckle body. The buckle body of the second buckle structure can be inserted into the buckle accommodating cavity of the first buckle structure synchronously with the plug being inserted into the socket, and the elastic buckle on the buckle body can be elastically contracted when blocked by the side wall of the buckle accommodating cavity. When the elastic buckle on the buckle body is aligned with the buckle groove on the buckle accommodating cavity, it can pop up and be inserted into the buckle groove, and the pressing contact on the pressing member can drive the elastic buckle to elastically contract and exit the hook accommodating cavity.

3. The locking device of the plug connector according to claim 2, characterized in that: The elastic hook comprises an elastic cantilever structure (131) arranged on the side wall of the buckle body and an inverted protrusion (132) arranged on the side wall of the elastic cantilever structure. The elastic cantilever structure can be inserted into the hook accommodating cavity together with the buckle body. The pressing contact on the pressing member can press the elastic cantilever side wall to elastically deform the elastic cantilever structure.

4. The locking device of the plug connector according to claim 3, characterized in that: The root of the elastic cantilever structure is located on the side wall of one end of the buckle body facing the socket, and the free end of the elastic cantilever structure extends in the direction away from the socket. The pressing contact on the pressing member can drive the free end of the elastic cantilever structure to swing so that the inverted protrusion on it exits the slot on the hook accommodating cavity.

5. The locking device of the plug connector according to claim 3, characterized in that: The plug is provided with a press positioning slot, and the pressing member further comprises a fixed arm (34), an elastic arm (32) and a pressing plate (31); the fixed arm is fixedly inserted in the press positioning slot, the elastic arm is installed on the fixed arm and can be elastically swung at a set angle, the pressing plate and the pressing contact are both fixedly connected to the elastic arm, the pressing plate extends out of the outer side wall of the plug, and a pressing portion for pressing by a finger is formed on the surface of the pressing plate, and pressing the pressing plate can drive the elastic arm to swing elastically and then drive the pressing contact to swing synchronously, and the elastic arm forms an elastic reset mechanism.

6. The locking device of the plug connector according to claim 5, characterized in that: The plug is provided with two push-positioning slots spaced apart along the arrangement direction of the plug-in portion, and two fixed arms are fixedly inserted into the push-positioning slots in a one-to-one correspondence. An elastic arm is provided on each fixed arm, and both ends of the pressing plate are fixedly connected to the two elastic arms respectively, and at least two pressing contacts are fixedly arranged on the pressing plate at intervals.

7. The locking device of the plug connector according to claim 5, characterized in that: A positioning opening (141) is provided on the side wall of the push positioning slot, the fixed arm and the elastic arm of the pressing member form a U-shaped structure, the fixed arm and the elastic arm are both inserted into the push positioning slot, the bottom of the U-shaped structure formed at one end of the fixed arm, and one end of the fixed arm is tightly against the bottom surface of the push positioning slot, the side of the fixed arm facing away from the elastic arm is tightly against one side wall of the push positioning slot, and the side of the elastic arm facing away from the fixed arm is elastically tightly against the other side wall of the push positioning slot, and an inverted snap-in point (33) is provided on the side wall of the fixed arm, the inverted snap-in point is clamped in the positioning opening to realize fixed positioning of the fixed arm in the push positioning slot, and the elastic arm can be elastically swung toward the fixed arm in the push positioning slot.

8. The locking device of the plug connector according to claim 7, characterized in that: A limiting protrusion (36) is provided on the free end of the elastic arm toward the fixed arm, and the limiting protrusion can press against a side wall of the positioning slot after the elastic arm swings to a set angle.

9. The locking device of the plug connector according to claim 7, characterized in that: At least two contact receiving grooves (142) with U-shaped groove structures are provided on the plug at intervals along the arrangement direction of the plug-in parts. The pressing contact can be swingably received in the contact receiving groove. The pressing plate covers the outer side of the opening of the contact receiving groove. The pressing contact is integrally formed on the surface of the pressing plate facing the contact receiving groove. The free end of the elastic cantilever structure of the elastic hook can also be swingably received in the contact receiving groove at a set angle.

10. The locking device of the plug connector according to claim 5, characterized in that: The plug comprises an upper insulating body (14), a lower insulating body (13) and a conductive component (12); an upper conductive accommodating cavity (143) with an opening at the lower end is formed on the upper insulating body, a lower conductive accommodating cavity (135) with an opening at the upper end is formed on the lower insulating body, the upper end of the lower insulating body is inserted into the inner side of the upper conductive accommodating cavity, an open slot (144) is provided on the side wall of the upper conductive accommodating cavity, and a positioning buckle (136) is provided on the outer side wall of the upper end of the lower insulating body, the positioning buckle and the open slot are connected to each other. The connection is fixed by snapping, and the two ends of the conductive component respectively form a wiring terminal and a plug-in conductive end. The wiring terminal of the conductive component is accommodated in the upper conductive accommodating cavity in the upper insulating body, and the plug-in conductive end of the conductive component is accommodated in the lower conductive accommodating cavity in the lower insulating body. The press-to-position slot and the contact accommodating slot are both arranged in the middle area of ​​the side wall of the upper insulating body, and are interspersed between adjacent upper conductive accommodating cavities. The elastic hook is arranged in the middle area of ​​the side wall of the lower insulating body, and is interspersed between adjacent lower conductive accommodating cavities.

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