Plugboard type connector and mounting structure thereof

Abstract

The utility model provides a plugboard type connector and a mounting structure thereof, and belongs to the field of electric connectors. The plugboard type connector comprises a rubber shell, a terminal and a secondary lock; a plurality of terminal holes are formed in the rubber shell, a socket is formed in the middle of the front end of the rubber shell, the terminals are inserted into the terminal holes, each terminal is provided with an electricity connection part and a wiring part, positioning slots are formed in the left side face and the right side face of the rubber shell, and the secondary lock is connected to the rubber shell through a pivoting connection structure and can move between an opening position and a locking position. The secondary lock is provided with a locking part, a locking part and a first locking part, the rubber shell is provided with a second locking part, when the secondary lock rotates to a locking position, the first locking part and the second locking part are clamped, meanwhile, the locking part locks the terminal in the terminal hole, and the locking part is used for being in locking connection with the circuit board. The plug-in type connector is reasonable in structural arrangement, the plug-in type connector and the circuit board are convenient to assemble, the overall height size is reduced after assembly, and thin design of products is facilitated.

Description

Technical Field

[0001] The present application relates to the technical field of electrical connectors, and in particular to a plug-in type connector and a mounting structure thereof. Background Art

[0002] With the rapid development of the electronics industry, various portable electronic devices have been widely used in daily life. Electrical connectors are needed in portable electronic devices. The function of the electrical connector is to connect the wires to the circuit board. Most of the existing electrical connectors are fixed on the surface of one side of the circuit board, and the terminals on the connectors are fixed to the circuit board by spot welding. The main problem of the above existing electrical connectors is that after being assembled with the circuit board, the electrical connector completely protrudes from the surface of the circuit board, and the overall height dimension is relatively large (at least the sum of the thickness of the circuit board and the height of the electrical connector), which is not conducive to the thin design of the product. Utility Model Content

[0003] In this regard, the present application provides a plug-in type connector, which is connected and assembled with a circuit board by plugging. The assembly is convenient and stable, the electrical conductivity is guaranteed, and the overall height size is reduced after assembly.

[0004] In order to achieve the above objectives, this application adopts the following technical solutions:

[0005] In the first aspect, the present application provides a plug-in connector for connecting a circuit board, which includes a plastic shell, a terminal and a secondary lock; a plurality of terminal holes are arranged side by side in the left and right directions in the plastic shell, a socket for inserting a plug-in part on the circuit board and communicating with the terminal holes is arranged in the middle of the front end of the plastic shell, and a plurality of terminals are inserted into the plurality of terminal holes one by one, each terminal has a power connection part contacting with a gold finger on the plug-in part and a wiring part for connecting a wire, the left and right sides of the plastic shell are provided with positioning slots extending in the front and rear directions, the front end of the positioning slots is open, the secondary lock is connected to the plastic shell by a pivot connection structure and can move between an open position and a locked position, a locking part, a locking part and a first locking part are arranged on the secondary lock, and a second locking part is arranged on the plastic shell, when the secondary lock is rotated to the locked position, the first locking part is engaged with the second locking part, and at the same time, the locking part locks the terminal in the terminal hole, and the locking part is used to lock and connect with the circuit board.

[0006] In some embodiments, the pivot connection structure includes a first connection structure provided on the plastic shell and a second connection structure provided on the secondary lock, and the first connection structure cooperates with the second connection structure to form a pivot connection; one of the first connection structure and the second connection structure is a convex shaft, and the other is an axis groove; an elastic arm is provided on the secondary lock, and the second connection structure is provided on the elastic arm.

[0007] In some embodiments, the upper surface of the plastic shell is provided with openings connected to each terminal hole, the secondary lock has a plate-like portion arranged along the left and right directions, the locking portion is a card platform formed on the plate-like portion and corresponding to each opening, and a locking portion is provided at each of the left and right ends of the plate-like portion. When the secondary lock is in the locked position, the card platform extends from the opening into the terminal hole to resist the terminal.

[0008] In some embodiments, the first locking portion is a buckle groove provided on the plastic shell, and the second locking portion is a buckle block provided on the side of the plate-shaped portion, and the buckle block is buckled with the buckle groove when the secondary lock is in the locked position.

[0009] In some embodiments, the locking portion is an elastic buckle integrally formed on the plate-shaped portion, and the end of the elastic buckle is downward when the secondary lock is in the locked position.

[0010] In some embodiments, the front end of the terminal is provided with a conductive arm on the upper and lower sides of the socket, and each conductive arm is integrally provided with two front and rear power connection parts extending into the socket, and the power connection parts are elastic cantilever structures; the power connection parts are bent with an arc corner facing away from the socket, and the outer arc surface of the arc corner is suitable for contacting with the gold finger.

[0011] In some embodiments, an anti-mistake rib is provided in the terminal hole, and a stop portion is provided on the terminal, so that when the terminal is inserted into the terminal hole in the forward direction, the terminal can be inserted into place by the misalignment of the anti-mistake rib and the stop portion, and when the terminal is inserted into the terminal hole in the reverse direction, the anti-mistake rib and the stop portion can resist each other to prevent the terminal from being inserted into place.

[0012] In some embodiments, the thickness of the side walls on the left and right sides of the socket on the plastic shell are different, or / and the front ends of the side walls on the left and right sides of the socket on the plastic shell are not flush.

[0013] In some embodiments, an anti-mistake rib is provided between two adjacent terminal holes in the socket on the plastic shell.

[0014] In the second aspect, the present application provides a plug-in connector installation structure, including a circuit board and the plug-in connector described above, the circuit board is provided with a mounting groove for the plug-in connector to be installed, the mounting groove is provided with a plug-in portion protruding toward its slot direction, and the mounting groove is provided with space avoidance grooves on both sides of the plug-in portion for avoiding the left and right side walls of the socket, gold fingers are provided on the upper and lower sides of the plug-in portion, and a locking card slot is provided on the circuit board, when the plug-in connector is installed in the mounting groove, the plug-in portion is inserted into the socket, the positioning slot forms a plug-in fit with the slot edge on the same side of the mounting slot, and the locking portion is engaged with the locking card slot when it is locked to the locked position for the second time.

[0015] The present application has the positive effects that the plug-in connector structure in the present application is optimized and designed. When the plug-in connector is assembled with the circuit board, the socket on the plastic shell is plugged into the plug-in part on the circuit board, and the electrical connection part contacts the gold finger to conduct the circuit. The plug-in connector and the circuit board are connected together by plugging, which is convenient for assembly. Further, by rotatably connecting and installing a secondary lock on the plastic shell, the secondary lock can be prevented from being separated from the plastic shell, and the secondary lock can be rotated from the open position to the locked position by rotating it, which is convenient for operation. At the same time, the terminal inserted into the terminal hole is locked by the locking part on the secondary lock to prevent the terminal from loosening; and the positioning slot and the groove edge of the mounting slot on the circuit board can be plugged in and matched to support and limit the plastic shell to enhance the stability of the connection between the plug-in connector and the circuit board. At the same time, a locking part is provided on the secondary lock, and the locking part is connected to the circuit board to ensure that the plug-in connector and the circuit board are reliably connected, so that reliable electrical conduction performance can be guaranteed; and after the plastic shell is connected to the circuit board, the overall height size is reduced, which is conducive to the thin design of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 This is a structural diagram of the plug-in connector (secondary lock) in this application;

[0018] Figure 2 for Figure 1 A structural diagram of the plug-in connector from another perspective;

[0019] Figure 3 This is a structural diagram of the plug-in connector (secondary lock opened) in this application;

[0020] Figure 4 for Figure 1 A top view of the illustrated plug-in connector;

[0021] Figure 5 For along Figure 4 Sectional view cut along line AA;

[0022] Figure 6 for Figure 1 A side view of the board connector shown in;

[0023] Figure 7 An exploded view of the plug-in board connector in this application;

[0024] Figure 8 This is a cross-sectional structural view of the plastic shell in this application;

[0025] Fig. 9 This is a schematic diagram of the structure of the secondary lock in this application;

[0026] Fig.10 It is a schematic diagram of the structure of the terminal in this application;

[0027] Fig.11 This is a schematic diagram of the structure of the plug-in type connector installed on the circuit board in this application;

[0028] Fig.12 This is a schematic diagram of the structure of the plug-in connector in this application installed in front of the circuit board.

[0029] Markings shown in the attached drawings:

[0030] 1-circuit board; 10-installation slot; 101-slot edge; 11-plug-in part; 12-gold finger; 13-locking slot; 14-air-avoiding slot;

[0031] 2-plastic shell; 20-opening; 21-terminal hole; 22-socket; 221-side wall; 23-positioning slot; 24-anti-mistake convex rib; 25-axis groove; 26-second locking part;

[0032] 3-terminal; 30-connection part; 31-electrical connection part; 32-conductive arm; 33-arc angle; 34-resistance part;

[0033] 4-secondary lock; 41-locking part; 42-locking part; 43-plate-shaped part; 44-first locking part; 45-convex shaft; 46-elastic arm. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0035] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly. In the present application, unless otherwise clearly specified and limited, the terms "connected", "fixed", etc. should be understood in a broad sense. For example, "fixed" can be a fixed connection, a detachable connection, or an integral whole; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0036] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0037] In this embodiment, the plug-in type connector structure is as follows Figures 1 to 10 As shown, the plug-in connector is used to connect a circuit board 1, and includes a plastic shell 2, a terminal 3 and a secondary lock 4; Figure 1In the XYZ three-dimensional coordinate system shown in , the X axis points to the left-right direction, the Y axis points to the up-down direction, and the Z axis points to the front-back direction. A plurality of terminal holes 21 are arranged side by side in the left-right direction in the plastic shell 2, and a socket 22 for inserting the plug-in portion 11 on the circuit board 1 is arranged in the middle of the front end of the plastic shell 2 and is connected to the terminal holes 21. A plurality of terminals 3 are inserted into the plurality of terminal holes 21 one by one. As shown in the accompanying drawings, four terminal holes 21 are arranged on the plastic shell 2, and a terminal 3 is arranged in each of the four terminal holes 21. In actual operation, the number of terminal holes 21 and terminals 3 can be increased or decreased according to actual needs; each terminal 3 has an electrical connection portion 31 that contacts the gold finger 12 on the plug-in portion 11 and a wiring portion 30 for connecting a wire. The electrical connection portion 31 contacts the gold finger 12 to electrically connect the terminal 3 to the circuit board 1, and the wiring portion 30 can be connected to the circuit board 1. The plastic shell 2 is connected to the wire by riveting and deformation, or by welding; the left and right sides of the plastic shell 2 are provided with positioning slots 23 extending in the front and rear directions, and the front end of the positioning slots 23 is open. The secondary lock 4 is connected to the plastic shell 2 by a pivot connection structure and can move between an open position and a locked position. A locking portion 41, a locking portion 42 and a first locking portion 44 are provided on the secondary lock 4. The plastic shell 2 is provided with a second locking portion 26. When the secondary lock 4 is rotated to the locked position, the first locking portion 44 is engaged with the second locking portion 26, and at the same time, the locking portion 41 locks the terminal 3 in the terminal hole 21, and the locking portion 42 is used to be locked and connected with the circuit board 1.

[0038] The plug-in connector structure of the present embodiment is optimized and designed. When the plug-in connector is assembled with the circuit board 1, the socket 22 on the plastic shell 2 is plugged into the plug-in portion 11 on the circuit board 1, and the power connection portion 31 contacts the gold finger 12 to conduct the circuit. The plug-in connector and the circuit board 1 are connected together by plugging, which is convenient for assembly. Further, the secondary lock 4 is rotatably connected and installed on the plastic shell 2, which can prevent the secondary lock 4 from being separated from the plastic shell 2, and the secondary lock 4 can be rotated from the open position to the locked position by rotating it, which is convenient for operation. At the same time, the locking portion 41 on the secondary lock 4 is used to lock the assembly. The terminal 3 inserted into the terminal hole 21 is locked to prevent the terminal 3 from loosening; and the positioning slot 23 is plugged into the groove edge 101 of the mounting groove 10 on the circuit board 1 to support and limit the plastic shell 2, so as to enhance the stability of the connection between the plug-in connector and the circuit board 1. At the same time, a locking portion 42 is provided on the secondary lock 4, and the locking portion 42 is positioned and connected with the circuit board 1 to ensure that the plug-in connector and the circuit board 1 are reliably connected, so that reliable electrical conduction performance can be guaranteed; and after the plastic shell 2 is connected to the circuit board 1, the overall height size is reduced, which is conducive to the thin design of the product.

[0039] More specifically, the pivot connection structure includes a first connection structure provided on the plastic shell 2 and a second connection structure provided on the secondary lock 4, and the first connection structure cooperates with the second connection structure to form a pivot connection; the first connection structure is an axis groove 25, and the second connection structure is a convex shaft 45, and the convex shaft 45 cooperates with the axis groove 25 to realize the rotatable installation of the secondary lock 4 on the plastic shell 2; as a variation, the first connection structure can also be set as a convex shaft 45, and the second connection structure can be set as an axis groove 25.

[0040] Furthermore, in order to facilitate the cooperation between the first connecting structure and the second connecting structure, an elastic arm 46 is provided on the secondary lock 4, and the second connecting structure is provided on the elastic arm 46. In this way, when the first connecting structure and the second connecting structure cooperate, the elastic arm 46 can be elastically deformed to easily form a cooperation.

[0041] like Figures 3 to 5 As shown, the upper surface of the plastic shell 2 is provided with an opening 20 connected to each terminal hole 21, the secondary lock 4 has a plate-like portion 43 arranged along the left and right directions, the locking portion 41 is a card platform formed on the plate-like portion 43 and corresponding to each opening 20, and a locking portion 42 is respectively provided at the left and right ends of the plate-like portion 43. When the secondary lock 4 is in the locked position, the card platform extends from the opening 20 into the terminal hole 21 to resist the terminal 3, thereby resisting and locking the terminal 3 to prevent the terminal 3 from loosening; by arranging the locking portions 42 at both ends of the plate-like portion 43 to cooperate with the circuit board 1, the stability of the assembly of the plug-in connector and the circuit board 1 can be better guaranteed.

[0042] like Figure 3 As shown, the first locking portion 44 is a buckle groove provided on the plastic shell 2, and the second locking portion 26 is a buckle block provided on the side of the plate-shaped portion 43. When the secondary lock 4 is in the locked position, the buckle block is buckled with the buckle groove to quickly lock the secondary lock 4 and prevent the secondary lock 4 from being easily flipped open. The structure is simple and feasible and easy to implement.

[0043] See also Figure 6 As shown, the locking portion 42 is an elastic buckle integrally formed on the plate-shaped portion 43. When the secondary lock 4 is in the locked position, the end of the elastic buckle is downward, and a locking slot 13 is correspondingly provided on the circuit board 1. When the plug-in connector is installed on the circuit board 1, the secondary lock 4 is flipped downward so that the end of the elastic buckle is downward and engaged with the locking slot 13 on the circuit board 1, thereby locking the plug-in connector; when the plug-in connector needs to be removed from the circuit board 1, the elastic buckle is disengaged from the locking slot 13, and then the secondary lock 4 is flipped upward to open, and then the plug-in connector is pulled out of the circuit board 1, which is easy to operate.

[0044] In order to strengthen the electrical connection between the terminal 3 and the circuit board 1, Figure 5 and Fig.10 As shown, in this embodiment, the front end of the terminal 3 is provided with a conductive arm 32 on the upper and lower sides of the socket 22, and each conductive arm 32 is integrally provided with two power connection parts 31, one in front and one in the back, extending into the socket 22. The power connection part 31 is an elastic cantilever structure, so that the power connection part 31 has good elasticity, which can ensure that the power connection part 31 maintains good contact with the gold finger 12; the power connection part 31 is bent with an arc corner 33 facing away from the socket 22, and the outer arc surface of the arc corner 33 is suitable for contacting with the gold finger 12, which can prevent the power connection part 31 from causing scratches and damage to the gold finger 12; gold fingers 12 are arranged on the upper and lower sides of the plug-in part 11 of the circuit board 1, and the power connection parts 31 on the upper and lower sides of the plug-in part 11 on the same terminal 3 are in contact with the gold fingers 12 on the corresponding sides of the plug-in part 11, and there are many contact points, which further ensures the electrical conduction performance.

[0045] In some embodiments, in order to prevent the terminal 3 from being installed in the wrong direction when inserted into the terminal hole 21, an anti-error rib 24 is provided in the terminal hole 21, and a stop portion 34 is provided on the terminal 3, so that when the terminal 3 is inserted into the terminal hole 21 in the forward direction, the anti-error rib 24 and the stop portion 34 are misaligned to allow the terminal 3 to be inserted into place, and when the terminal 3 is inserted into the terminal hole 21 in the reverse direction, the anti-error rib 24 and the stop portion 34 abut against each other to prevent the terminal 3 from being inserted into place; in this way, the terminal 3 can be prevented from being reversely installed in the terminal hole 21, thereby ensuring the consistency of the installation of the terminal 3.

[0046] In some embodiments, in order to prevent the plug-in connector from being installed upside down when being assembled with the circuit board 1, the thickness of the side walls 221 on the left and right sides of the socket 22 on the plastic shell 2 is set to be different, or / and the front ends of the side walls 221 on the left and right sides of the socket 22 on the plastic shell 2 are not flush, so that the left and right sides of the plastic shell 2 are differentiated, thereby increasing its fool-proof and error-proofing capabilities when assembled with the circuit board 1; that is, the assembly can only be completed when the structure on the circuit board 1 matches the corresponding structure on the plastic shell 2.

[0047] On the basis of the above embodiment, or as an alternative to the above embodiment, an anti-mistake rib is provided between two adjacent terminal holes 21 in the socket 22 on the plastic shell 2, and an anti-mistake groove needs to be provided on the plug-in portion 11 of the circuit board 1. In this way, the plug-in connector can be assembled with the circuit board 1 only when the anti-mistake rib corresponds to the anti-mistake groove during assembly, thereby improving the anti-mistake and anti-error capabilities during assembly.

[0048] In the second aspect, the plug-in connector installation structure in this embodiment, see Fig.11 and Fig.12As shown, it includes a circuit board 1 and the plug-in connector in any of the above embodiments, the circuit board 1 is provided with a mounting groove 10 for the plug-in connector to be installed, the mounting groove 10 is provided with a plug-in portion 11 protruding toward its groove direction, and the mounting groove 10 is provided with a space-avoiding groove 14 on both sides of the plug-in portion 11 for avoiding the left and right side walls 221 of the socket 22. The shape of the space-avoiding groove 14 can be set to match the corresponding side walls 221 of the socket 22 to obtain a fool-proof and error-proof function during assembly, and gold fingers 12 are provided on both upper and lower sides of the plug-in portion 11, and a locking card slot 13 is provided on the circuit board 1. When the plug-in connector is installed in the mounting groove 10, the plug-in portion 11 is inserted into the socket 22, and the positioning slot 23 forms a plug-in fit with the groove edge 101 on the same side of the mounting groove 10, and when the secondary lock 4 is in the locked position, the locking portion 42 is engaged with the locking card slot 13, so that it can be ensured that the plug-in connector and the circuit board 1 are reliably assembled together.

[0049] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A plug-in connector for connecting a circuit board (1), comprising a plastic shell (2), a terminal (3) and a secondary lock (4); a plurality of terminal holes (21) are arranged side by side in the left-right direction in the plastic shell (2); a socket (22) is arranged in the middle of the front end of the plastic shell (2) and is connected to the terminal hole (21) for inserting a plug-in part (11) on the circuit board (1); a plurality of terminals (3) are plugged into the plurality of terminal holes (21) one by one; each terminal (3) has a power connection part (31) in contact with a gold finger (12) on the plug-in part (11) and a wiring part (30) for connecting a wire, characterized in that: The left and right sides of the plastic shell (2) are provided with positioning slots (23) extending in the front-to-back direction, and the front end of the positioning slots (23) is open. The secondary lock (4) is connected to the plastic shell (2) through a pivot connection structure and can move between an open position and a locked position. The secondary lock (4) is provided with a locking portion (41), a locking portion (42) and a first locking portion (44). The plastic shell (2) is provided with a second locking portion (26). When the secondary lock (4) is rotated to the locked position, the first locking portion (44) is engaged with the second locking portion (26), and at the same time, the locking portion (41) locks the terminal (3) in the terminal hole (21), and the locking portion (42) is used for locking and connecting with the circuit board (1).

2. The plug-in connector according to claim 1, characterized in that: The pivot connection structure comprises a first connection structure provided on the plastic shell (2) and a second connection structure provided on the secondary lock (4), and the first connection structure cooperates with the second connection structure to form a pivot connection; One of the first connection structure and the second connection structure is a convex shaft (45), and the other is a shaft groove (25); the secondary lock (4) is provided with an elastic arm (46), and the second connection structure is provided on the elastic arm (46).

3. The board-type connector according to claim 1, characterized in that: The upper surface of the plastic shell (2) is provided with openings (20) communicating with each terminal hole (21); the secondary lock (4) has a plate-shaped portion (43) arranged along the left-right direction; the locking portion (41) is a clamping plate formed on the plate-shaped portion (43) and corresponding to each opening hole (20); a locking portion (42) is provided at each of the left and right ends of the plate-shaped portion (43); when the secondary lock (4) is in a locked position, the clamping plate extends from the opening (20) into the terminal hole (21) to abut against the terminal (3).

4. The board-type connector according to claim 3, characterized in that: The first locking portion (44) is a buckle groove provided on the plastic shell (2), and the second locking portion (26) is a buckle block provided on the side of the plate-shaped portion (43). When the secondary lock (4) is in the locked position, the buckle block is buckled with the buckle groove.

5. The board-type connector according to claim 3, characterized in that: The locking portion (42) is an elastic buckle integrally formed on the plate-shaped portion (43), and the end of the elastic buckle faces downward when the secondary lock (4) is in the locked position.

6. The board-type connector according to claim 1, characterized in that: The front end of the terminal (3) is provided with a conductive arm (32) on the upper and lower sides of the socket (22), and each conductive arm (32) is integrally provided with two power connection parts (31) extending into the socket (22), one in front and one in the back, and the power connection parts (31) are elastic cantilever structures; the power connection parts (31) are bent with an arc corner (33) facing away from the socket (22), and the outer arc surface of the arc corner (33) is suitable for contacting with the gold finger (12).

7. The board-type connector according to any one of claims 1 to 6, characterized in that: An anti-mistake convex rib (24) is provided in the terminal hole (21), and a stopper (34) is provided on the terminal (3), so that when the terminal (3) is inserted into the terminal hole (21) in the forward direction, the anti-mistake convex rib (24) and the stopper (34) are misaligned so that the terminal (3) is inserted into place, and when the terminal (3) is inserted into the terminal hole (21) in the reverse direction, the anti-mistake convex rib (24) and the stopper (34) abut against each other to prevent the terminal (3) from being inserted into place.

8. The board-type connector according to any one of claims 1 to 6, characterized in that: The side walls (221) on the left and right sides of the plug opening (22) on the plastic shell (2) have different thicknesses, or / and the front ends of the side walls (221) on the left and right sides of the plug opening (22) on the plastic shell (2) are not flush.

9. The board-type connector according to any one of claims 1 to 6, characterized in that: An anti-misalignment rib is provided between two adjacent terminal holes (21) in the socket (22) on the plastic shell (2).

10. A plug-in board connector installation structure, characterized in that: The invention comprises a circuit board (1) and a plug-in connector according to any one of claims 1 to 9, wherein the circuit board (1) is provided with a mounting groove (10) for the plug-in connector to be installed, a plug-in portion (11) protruding toward the groove opening is provided in the mounting groove (10), and freeing grooves (14) for avoiding the left and right side walls (221) of the socket (22) are provided on both sides of the plug-in portion (11) in the mounting groove (10), gold fingers (12) are provided on both upper and lower sides of the plug-in portion (11), and a locking card slot (13) is provided on the circuit board (1), when the plug-in connector is installed in the mounting groove (10), the plug-in portion (11) is inserted into the socket (22), the positioning slot (23) forms a plug-in fit with the groove edge (101) on the same side of the mounting groove (10), and when the secondary lock (4) is in the locked position, the locking portion (42) is engaged with the locking card slot (13).

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