Inter-board self-locking surface mounting connector

Abstract

The utility model belongs to the technical field of connectors, and particularly relates to an inter-board self-locking surface mounting connector, which is characterized in that an insertion end of a plug insulator is provided with an insertion cavity, two opposite side walls of the insertion cavity are provided with clamping grooves, two side walls of a socket insulator are provided with clamping tables nested in the clamping grooves in a sliding manner, and the clamping tables are provided with clamping grooves. And the plug insulator is provided with a clamping hole which is in stop fit with the clamping table in the separation direction of the head seat. Compared with the prior art, the utility model has the beneficial effects that after the clamping platform enters the clamping grooves, the clamping grooves at the two sides limit the clamping platform, so that the plug and the socket are vertically inserted, inclined insertion is avoided, inclined pulling is avoided when the plug and the socket are pulled out, and the damage to the plug and the socket caused by inclined insertion and pulling is prevented; the clamping hole is formed in the rear end of the clamping groove, clamping and locking are achieved after the clamping table slides to the clamping hole, the overall structure is compact, and the size is small; after locking, the clamping holes in the two sides clamp the clamping tables at the same time, when vibration occurs, the clamping holes in the two directions clamp the corresponding clamping tables at the same time, and loosening caused by disengaging is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of connectors, and in particular relates to an inter-board self-locking surface mount connector. Background Art

[0002] The patent with application number 201420247901.6 in the prior art discloses a surface mount connector with positioning and anti-misinsertion function, including a plug and a socket. The plug is provided with a plug base, a plug shell, and a plug contact. Two protrusions are provided on the upper part of the plug shell. The socket includes a socket base, a socket shell, and a socket contact. Two recesses are provided on the socket shell. The two protrusions are plugged into the two grooves to realize the plug-in connection between the plug and the socket. After the connector is plugged in, the patent mainly relies on the plugging force to prevent the plug and the socket from falling off, and it is easy to loosen in a vibration environment.

[0003] There are two types of snap-on locking structures for connectors on the market: one is the boss snap-on and the other is the hook-type snap-on. The advantages of these two snap-on locking structures are: the boss snap-on takes up less space and can reduce the product size; the external locking parts and mating parts of the hook-type snap-on are wear-free, and the mating parts have a wider range of material selection to meet different welding conditions. The disadvantages of these two snap-on locking structures are: the boss snap-on is prone to breakage when inserted and removed obliquely, especially for smaller surface-mount connectors; the hook-type snap-on takes up more space and is not suitable for surface-mount connectors. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides an inter-board self-locking surface mount connector.

[0005] The purpose of the utility model is to be achieved by adopting the following technical scheme. According to the utility model, a self-locking surface mount connector between boards is proposed, including a plug and a socket, wherein the plug includes a plug insulator and a pin disposed in the plug insulator, and the socket includes a socket insulator and a socket disposed in the socket insulator, wherein the plug-in end of the plug insulator is provided with an insertion cavity, and the two side walls opposite to each other of the insertion cavity are provided with a card slot extending along the insertion direction, and the two side walls of the socket insulator are provided with a card platform that is slidably nested in the card slot when the head seat is plugged in, and the plug insulator is provided with a card hole that is matched with the card platform in the direction of separation of the head seat after the head seat is plugged in, and the card hole is located on the side of the card slot away from the plug-in end and is connected to the card slot.

[0006] Compared with the prior art, the utility model is advantageous in that: card slots are provided on both sides of the plug-in cavity. When the plug and the socket are plugged in, the card platforms on both sides of the plug-in end of the socket need to be aligned with the card slots on both sides before they can be plugged in. When the card platform enters the card slot, the card slots on both sides limit the card platform, so that the plug and the socket are plugged in vertically to avoid oblique insertion and oblique pulling when pulling out, thereby preventing damage to the plug and the socket caused by oblique insertion and pulling out; and the card slot is arranged on the inner wall of the plug-in cavity, the card platform is slidably nested in the card slot and is squeezed, the wall body and / or the card platform where the card slot is located are deformed, and the card hole is arranged at the rear end of the card slot, and the card platform slides to the card hole to achieve card connection and locking, and the overall structure is compact and small in size; after locking, the card holes on both sides clamp the card platform at the same time, and when vibration occurs, the card holes in two directions clamp the corresponding card platform at the same time to avoid slipping out and loosening.

[0007] Furthermore, two card slots are provided on both side walls of the plug-in cavity, and the two card slots on the same side wall are respectively located at 1 / 4 and 3 / 4 of the length direction of the plug insulator, and the card slots (116) on both side walls of the plug-in cavity are symmetrically arranged.

[0008] Compared with the prior art, the utility model is advantageous in that the locking structures (card slot 116, card hole 117, card platform 213) are distributed at 1 / 4 and 3 / 4 of the length of the connector and are symmetrically arranged. The card platform is nested in the card slot and inserted into the card hole, further preventing the connector from being inserted or pulled out obliquely and achieving further locking.

[0009] Furthermore, the clamping platform is provided with a chamfer, and the size of the chamfer close to the plug-in end of the clamping platform is larger than the size of the chamfer far from the plug-in end.

[0010] Compared with the prior art, the utility model is advantageous in that a chamfer is provided on the card table, and the chamfer size at the front end of the card table is larger than the chamfer at the rear end, which saves effort during insertion and avoids unreliable locking function of the connector after insertion.

[0011] Furthermore, the side wall of the plug insulator is provided with a plurality of process grooves, and the side wall of the process groove close to the plugging end is a concave surface.

[0012] Compared with the prior art, the utility model is advantageous in that the plug insulator is formed by injection molding, and the uneven wall thickness of the plug insulator 11 will lead to inconsistent flow rate during the injection molding process, which in turn will cause serious warping of the finished plug insulator. Therefore, adding process grooves and other structures to the plug insulator reduces the degree of warping deformation.

[0013] Furthermore, the side wall of the plug-in cavity is provided with an anti-error groove extending along the plug-in direction, and the side wall of the socket insulator is provided with an anti-error platform which is slidably nested in the anti-error groove when the plug and the socket are plugged into each other.

[0014] Compared with the prior art, the utility model is advantageous in that an anti-mismatch groove is provided on the inner wall of the plug-in cavity and an anti-mismatch platform is provided on the outer wall of the socket, which does not affect the overall shape and structure and can prevent mismatch.

[0015] Furthermore, the opening edge of the insertion cavity is provided with a guiding chamfer for guiding the insertion of the socket.

[0016] Compared with the prior art, the utility model is advantageous in that the opening size of the plug-in cavity is increased, so that the socket can be plugged in smoothly.

[0017] Furthermore, the plug contact is a pin, and a pin mounting hole is provided at the end of the plug insulator away from the plugging end, and barbs I are provided on both sides of the pin, and the pin is forcibly installed in the pin mounting hole through the barbs I; the socket contact is a jack, and a jack mounting hole is provided on the socket insulator, and barbs II are provided on both sides of the jack, and the jack is forcibly installed in the jack mounting hole through the barbs II.

[0018] Compared with the prior art, the utility model is beneficial in that the insulator and the corresponding contact piece have an insertion pre-tightening force, which reduces the warping deformation of the connector after assembly.

[0019] Furthermore, the plug-in end of the socket insulator is provided with a plug-in hole, which passes through the plug-in end face and is connected with the socket mounting hole. The inner diameter of the plug-in hole is smaller than the inner diameter of the socket mounting hole. After the socket is inserted into the socket mounting hole, the socket is located on the rear side of the step surface formed by the socket mounting hole and the plug-in hole, and the pin is plugged into the socket after passing through the plug-in hole.

[0020] Compared with the prior art, the utility model is advantageous in that the jack is arranged at the rear side of the plug-in end of the socket, thereby avoiding collision during plug-in and damage to the contact piece.

[0021] Furthermore, the insertion end of the insertion hole is provided with a chamfer.

[0022] Compared with the prior art, the utility model is advantageous in that the size of the plug-in hole is increased, making it easier for the pin to be inserted.

[0023] Furthermore, the plug-in end of the plug contact is provided with a chamfer.

[0024] Compared with the prior art, the utility model is advantageous in that it is convenient for the plug pin to be plugged into the plug hole and the plug socket on the socket.

[0025] The self-locking function of the product is realized, and at the same time, the defects of product warping after assembly, failure to meet reflow soldering, and plug-in cracks are overcome.

[0026] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model, 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 utility model more obvious and easy to understand, the following preferred embodiments are specifically cited and described in detail with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a three-dimensional diagram of an embodiment of an inter-board self-locking surface mount connector of the utility model;

[0028] Figure 2 for Figure 1 A stereogram from another perspective;

[0029] Figure 3 for Figure 1 Schematic cross-sectional view of ;

[0030] Figure 4 for Figure 1 A perspective view of the middle plug;

[0031] Figure 5 for Figure 4 A stereogram from another perspective;

[0032] Figure 6 for Figure 4 A front view of

[0033] Figure 7 for Figure 6 Sectional view at A in the middle;

[0034] Figure 8 for Figure 4 A perspective view of the middle plug insulator;

[0035] Fig. 9 for Figure 8 A stereogram from another perspective;

[0036] Fig.10 for Figure 8 Schematic cross-sectional view of ;

[0037] Fig.11 for Figure 4 A three-dimensional diagram of the middle pin;

[0038] Fig.12 for Fig.11 A front view of

[0039] Fig.13 for Fig.11 Left view of

[0040] Fig.14 for Figure 1 A perspective view of the middle socket;

[0041] Fig.15 for Fig.14 A stereogram from another perspective;

[0042] Fig.16 for Fig.14 A front view of

[0043] Fig.17 for Fig.16 Sectional view at B in the middle;

[0044] Fig.18 for Fig.14 A perspective view of the middle socket insulator;

[0045] Fig.19 for Fig.18 A stereogram from another perspective;

[0046] Fig. 20 for Fig.18 Schematic cross-sectional view of ;

[0047] Fig.21 for Fig.14 A stereogram of the center jack;

[0048] Fig. 22 for Fig.21 A front view of

[0049] Fig.23 for Fig. 22 Left view of .

[0050] [Reference Signs]

[0051] 1-plug, 2-socket;

[0052] 11-plug insulator, 111-pin mounting hole, 112-insertion cavity, 113-insertion boss, 114-guide chamfer, 115-process groove, 116-card slot, 117-card hole, 118-card surface, 119-anti-mistake groove, 1110-limiting groove, 1111-bump I;

[0053] 12-pin, 121-pin body, 122-pin pin, 123-barb I;

[0054] 13-locking clip I, 131-guiding protrusion;

[0055] 21-socket insulator, 211-socket mounting hole, 212-insertion hole, 213-card table, 214-anti-mistake table, 215-boss II;

[0056] 22-jack, 221-jack body, 222-jack pin, 223-barb II;

[0057] 23-Locking clamp II. DETAILED DESCRIPTION

[0058] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0059] The utility model is an embodiment of a self-locking surface mount connector between boards, such as Figures 1 to 23 As shown, the connector includes a plug 1 and a socket 2 which are plugged into each other. Figures 1 to 3 The terminal connection between the plug, socket and corresponding printed circuit board is surface mount.

[0060] The plug 1 includes a plug insulator 11, a plug contact, and a locking clip 13. Figures 4 to 7 The plug contact is a pin 12.

[0061] Plug insulator 11 as Figures 8 to 10 As shown, its overall shape is a rectangular parallelepiped. The plug insulator 11 is provided with two rows of evenly distributed pin mounting holes 111, which are used to insert the pins 12, and the distribution direction of each row of pin mounting holes 111 is the length direction of the plug insulator 11. The axial direction of the pin mounting holes 111 is the plugging direction of the plug, and the plugging end is described as the front end.

[0062] The front end of the plug insulator 11 is provided with an insertion cavity 112, and two rows of pin mounting holes 111 are located at the rear side of the insertion cavity 112, and the pin mounting holes 111 penetrate the wall at the rear side of the insertion cavity 112. The insertion cavity 112 is used to accommodate a socket.

[0063] The bottom of the plug-in cavity 112 is provided with plug-in bosses 113 corresponding one to one with the pin mounting holes 111. The opening of the pin mounting holes 111 is located on the end face of the plug-in bosses 113. The front end of the plug-in bosses 113 is provided with chamfers for matching, guiding and limiting with the structure on the socket.

[0064] The opening edge of the insertion cavity 112 is provided with a guide chamfer 114 for guiding the insertion with the socket 2 .

[0065] A plurality of process grooves 115 are distributed on both side walls of the plug insulator 11. The process grooves 115 are distributed along the length direction of the plug insulator 11. The process grooves 115 penetrate the rear side wall of the plug insulator 11 and the plug-in cavity 112. The two sides of the rear side wall of the plug insulator 11 where the process grooves 115 are located are inclined to form chamfers, and the side wall of the process groove near the plug-in end is an arc-shaped concave surface. The plug insulator 11 is formed by injection molding. The uneven wall thickness of the plug insulator 11 will lead to inconsistent flow rate during the injection molding process, which will further lead to severe warping of the finished plug insulator 11. Therefore, adding structures such as process grooves 115 to the plug insulator reduces the degree of warping deformation.

[0066] The two side walls of the plug-in cavity 112 in the length direction are provided with a card slot 116, and the card slot 116 extends in the plug-in direction, and the card slot 116 extends from the plug-in end to the bottom of the plug-in cavity. In this embodiment, two card slots 116 are provided on the two side walls of the plug-in cavity, and the two card slots 116 on the same side wall are respectively located at 1 / 4 and 3 / 4 of the length direction of the plug insulator 11, and the card slots on the two side walls of the plug-in cavity are symmetrically arranged. A card hole 117 is correspondingly provided on the rear side of each card slot 116, and the card hole 117 penetrates the wall body at the rear end of the plug-in cavity, and forms a card surface 118 on the wall body of the plug-in cavity. The opening at the rear end of the card slot 116 is located on the card surface 118, and the corresponding structure on the socket is inserted along the card slot 116 and is stuck on the card surface 118.

[0067] One side wall of the insertion cavity 112 in the length direction is provided with an anti-error groove 119, which extends in the insertion direction, from the insertion end surface to the rear end of the insertion cavity 112, and penetrates the wall body at the rear side of the insertion cavity 112. The anti-error groove 118 matches the anti-error platform on the socket to prevent the plug and the socket from being inserted incorrectly.

[0068] The plug insulator 11 has limit grooves 1110 at both ends in the length direction, the openings of the limit grooves 1110 are located at the plugging end surface and penetrate the wall of the plugging cavity 112. The limit grooves 1110 are plugged and matched with the limit platforms on the socket to limit the socket and the plug to each other.

[0069] Both ends of the plug insulator 11 in the length direction are provided with a protrusion 1111, and the protrusion 11111 is located at the rear end of the plug insulator 11. A locking clip 113 extending backward is provided on the protrusion 1111, which is used to clamp with the printed circuit board. The limiting groove 1110 and the locking clip 113 of the plug insulator 11 are both located at both ends of the plug, and the locking clip 113 is fixed on the printed circuit board, and the limiting groove 1110 cooperates with the limiting platform to achieve a firm fixation between the two printed circuit boards and the plug and the socket.

[0070] The locking clamp I13 includes two symmetrical cantilever structures. Two outward-facing guide protrusions 131 are distributed in sequence from the movable end to the fixed end of the cantilever structure. One side wall of the two guide protrusions 131 is inclined toward the movable end, and the other side wall is vertical. When the locking clamp I13 is inserted into the hole of the printed circuit board, the two cantilever structures first shrink relatively, and then return to their original state, so as to be stuck in the hole of the printed circuit board. The printed circuit board can be stuck between the two guide protrusions 131 to fix the plug. In order to smoothly realize the insertion and fixation of the locking clamp I13, the side wall of the guide protrusion 131 close to the movable end is inclined more gently; in order to clamp the printed circuit board between the two guide protrusions 131 and prevent shaking, the side wall of the guide protrusion 131 close to the fixed end is inclined more steeply.

[0071] Pin 12 Figures 11 to 13 As shown, the overall shape of the plug pin 12 is L-shaped. The plug pin 12 includes a plug body 121 and a plug pin 122. The plug pin 122 is located at the tail end of the plug body 121 and is bent and extended to one side. Barbs I 123 are provided on both sides of the tail of the plug body 121 for forced installation in the pin mounting hole 111. The head of the plug body 121 is provided with a chamfer so that the head of the plug body 121 forms a pointed portion for easy insertion into the jack. After the plug pin 12 is forcedly installed in the pin mounting hole 111, the pin body 12 is located in the insertion cavity 112, and the pin pin 122 is located on the rear side of the plug insulator 11. The pin pins 122 of each pin 12 are symmetrically distributed on the rear side of the plug insulator 11 and extend to both sides of the plug insulator 11.

[0072] The socket 1 comprises a socket insulator 21, a socket contact, and a locking member II 23, as shown in FIG. Figures 14 to 17 The socket contact is a socket 22.

[0073] Socket insulator 21 as Figures 18 to 20 As shown, the overall shape of the socket insulator 21 is a rectangular parallelepiped, and two rows of evenly distributed socket mounting holes 211 are provided on the socket insulator 21. The two rows of socket mounting holes 211 are distributed along the length direction of the socket insulator 21. The axial direction of the socket mounting hole 211 is the plugging direction, and the plugging end of the socket is described as the front end.

[0074] The jack mounting hole 211 penetrates to the rear end face of the socket insulator 21, and the jack 22 is inserted into the jack mounting hole 211 from the rear end of the jack mounting hole 211. An insertion hole 212 is provided at the front side of the jack mounting hole 211, and the insertion hole 212 penetrates to the insertion end face and communicates with the jack mounting hole 211. The inner diameter of the insertion hole 212 is smaller than the inner diameter of the jack mounting hole 211, and the edge of the front end of the insertion hole 211 is chamfered to facilitate the insertion with the insertion boss 113, which is conducive to the plug-in between the plug and the socket. After the jack 22 is inserted into the jack mounting hole 211, the jack 22 is located at the rear side of the step surface formed by the jack mounting hole 211 and the insertion hole 212. After the pin passes through the insertion hole 212, it is plugged into the jack 22 to prevent the pin 12 from colliding with the jack 22.

[0075] Two clamping platforms 213 are provided on both side walls of the socket insulator 21 in the length direction, and the clamping platforms 213 are close to the plug-in end of the socket insulator 21. When the plug and the socket are plugged in, the clamping platform 213 is inserted into the card slot 116 on the plug, and the wall body where the card slot is located on the plug insulator and / or the clamping platform 213 are deformed to make room for the sliding fit between the clamping platform and the card slot. When the plug and the socket are plugged in place, the clamping platform 213 enters the card hole 117, and the wall body where the card slot is located and / or the clamping platform 213 are restored to their original state, and the clamping platform is clamped on the clamping surface 118. The clamping platforms 213 are symmetrically arranged on both sides of the socket insulator 21, and the card slot 116 is symmetrically clamped on both sides of the plug insertion cavity. After the plug and the socket are plugged in, the plug and the socket are prevented from being disengaged and loosened when shaking occurs.

[0076] The edges of the front and rear ends of the card platform 213 are both chamfered, wherein the size of the chamfer of the front end edge of the card platform 213 is larger than the size of the chamfer of the rear end edge of the card platform, so that when the plug and the socket are plugged in, the card platform 213 is easy to insert into the card slot, and after the plug and the socket are plugged in, the card platform 213 is easy to be stuck on the card surface 118.

[0077] An anti-mismatch platform 214 is provided on one side wall of the socket insulator 21 in the length direction. When the plug and the socket are in the correct insertion orientation, the anti-mismatch platform 214 is inserted into the anti-mismatch groove 119 of the plug; when the plug and the socket are in the wrong insertion orientation, the plug and the socket cannot be inserted into each other, thereby preventing mis-insertion.

[0078] The socket insulator 21 is provided with protrusions II 215 on the side walls at both ends in the length direction. The protrusions II 215 are close to the rear end, and the rear end surface thereof is provided with a locking member II 23. The locking member II 23 is used to be inserted into the corresponding printed circuit board. Its structure and connection relationship with the printed circuit board are the same as those of the locking member I13, and will not be repeated here. The projections of the cantilever structure on the locking member I13 and the cantilever structure on the locking member II 23 on the plane where the printed circuit board is located are perpendicular to each other. After the plug and the socket are plugged in, the plug and the socket can be limited in two directions perpendicular to each other at the same time, thereby enhancing the binding force between the plug and the socket and avoiding looseness. After the socket and the plug are plugged in, the protrusions II 215 are inserted into the limiting groove 1110 to limit the plug and the socket.

[0079] Jack 22 as Figure 21 to Figure 23 As shown, the jack 22 is L-shaped as a whole, including a jack body 221 and a jack pin 222. The jack pin 222 is arranged at the tail end of the jack body 221 and bends and extends to one side. Both side walls of the jack body 221 are provided with barbs II 223 for forcing the jack 22 into the jack mounting hole 211.

[0080] After the jacks 22 are forcibly installed in the jack mounting holes 211 , the jack pins 222 of the two rows of jacks 22 are symmetrically distributed and extend to both sides of the socket.

[0081] The pin pins 122 and the socket pins 222 are fixed on the corresponding printed circuit board by reflow soldering. The plug insulator 11 and the socket insulator 21 are made of 33% glass fiber PA10T material, which can withstand the high temperature of reflow soldering, ensuring the elasticity of the plug insulator and the socket insulator and meeting the requirements of reflow soldering.

[0082] In summary, the locking structure (card slot 116, card hole 117, card platform 213) of the connector in the utility model is distributed at 1 / 4 and 3 / 4 of the length direction of the connector, and is symmetrically arranged. The card platform is nested in the card slot and plugged in to avoid oblique insertion and removal of the connector; a chamfer is set on the card platform, and the chamfer size at the front end of the card platform is larger than the chamfer at the rear end, which saves effort when plugging in and avoids unreliable locking function of the connector after plugging in.

[0083] The front end of the plug pin 12 is provided with a chamfer, the opening edge of the plug-in cavity 112 is provided with a chamfer, and multiple plug pins 12 are distributed in the plug-in cavity 112. The plug pin 12 is provided with a plug-in boss 113 at the root of the plug-in cavity, and the end of the plug-in boss 113 is provided with a chamfer. Correspondingly, the opening of the plug-in hole 212 of the socket insulator 21 is provided with a chamfer, and the plug-in end of the plug 12 is arranged inside the socket insulator. The clamping platform 213 is provided with a chamfer, which is conducive to the smooth insertion of the rectangular plug and the rectangular socket when they are plugged together, and avoids the plug insulator from cracking due to the addition of the locking structure. In order to avoid cracking, the plug and socket in the prior art need to increase the volume, so the utility model can reduce the size of the plug and the socket.

[0084] Barbs I 123 and II 223 for strong installation are arranged on both sides of the pin and the socket, which have insertion pre-tightening force and reduce the warping deformation of the connector after assembly.

[0085] Although 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 variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An inter-board self-locking surface mount connector, comprising a plug (1) and a socket (2), wherein the plug (1) comprises a plug insulator (11) and a plug contact disposed in the plug insulator (11), and the socket (2) comprises a socket insulator (21) and a socket contact disposed in the socket insulator (21), characterized in that: The plug insulator (11) is provided with an inserting cavity (112) at the inserting end, and the opposite side walls of the inserting cavity (112) are provided with a card slot (116) extending along the inserting direction, and the side walls of the socket insulator (21) are provided with a card platform (213) which is slidably nested in the card slot (116) when the head seats are inserted into each other, and the plug insulator (11) is provided with a card hole (117) which is matched with the card platform (213) in the direction of separation of the head seats after the head seats are inserted into each other, and the card hole (117) is located on a side of the card slot (116) away from the inserting end and is connected to the card slot (116).

2. The inter-board self-locking surface mount connector according to claim 1, characterized in that: Two card slots (116) are provided on both side walls of the plug-in cavity (112); the two card slots (116) on the same side wall are respectively located at 1 / 4 and 3 / 4 of the length direction of the plug insulator (11); and the card slots (116) on the two side walls of the plug-in cavity (112) are symmetrically arranged.

3. The inter-board self-locking surface mount connector according to claim 1, characterized in that: The clamping platform (213) is provided with a chamfer, and the size of the chamfer close to the plug-in end of the clamping platform (213) is larger than the size of the chamfer far from the plug-in end.

4. The inter-board self-locking surface mount connector according to claim 1, characterized in that: The side wall of the plug insulator (11) is provided with a plurality of process grooves (115), and the side wall of the process groove close to the plug-in end is a concave surface.

5. The inter-board self-locking surface mount connector according to claim 1, characterized in that: The side wall of the plug-in cavity (112) is provided with an anti-mistake groove (112) extending along the plug-in direction, and the side wall of the socket insulator (21) is provided with an anti-mistake platform (214) which is slidably nested in the anti-mistake groove (112) when the plug and the socket are plugged into each other.

6. The inter-board self-locking surface mount connector according to claim 1, characterized in that: The opening edge of the insertion cavity (112) is provided with a guide chamfer (114) for guiding the insertion of the socket.

7. The inter-board self-locking surface mount connector according to claim 1, characterized in that: The plug contact is a plug pin (12), and a plug pin mounting hole (111) is provided at the end of the plug insulator (11) away from the plug-in end, and barbs I (123) are provided on both sides of the plug pin (12), and the plug pin (12) is forcibly installed in the plug pin mounting hole (111) through the barbs I (123); the socket contact is a socket (22), and a socket mounting hole (211) is provided on the socket insulator (21), and barbs II (223) are provided on both sides of the socket (22), and the socket (22) is forcibly installed in the socket mounting hole (211) through the barbs II (223).

8. The inter-board self-locking surface mount connector according to claim 7, characterized in that: The plug-in end of the socket insulator (21) is provided with a plug-in hole (212), the plug-in hole (212) penetrates to the plug-in end surface and communicates with the socket mounting hole (211), the inner diameter of the plug-in hole (212) is smaller than the inner diameter of the socket mounting hole (211), after the socket (22) is inserted into the socket mounting hole (211), the socket (22) is located at the rear side of the step surface formed by the socket mounting hole (211) and the plug-in hole (212), and the plug pin (12) is inserted into the socket (22) after passing through the plug-in hole (212).

9. The inter-board self-locking surface mount connector according to claim 8, characterized in that: The insertion end of the insertion hole (212) is provided with a chamfer.

10. The inter-board self-locking surface mount connector according to claim 1, characterized in that: The plug-in end of the plug contact is provided with a chamfer.

Images