Connector with secondary lock

Abstract

According to the connector with the secondary lock, when the TPA piece is located at the primary lock position, the third clamping block of the TPA piece is clamped into the fourth clamping groove of the jack contact piece, the jack contact piece can be effectively prevented from moving backwards, and primary locking is achieved; when the TPA piece is further pressed downwards towards the base in the second direction, the lower end of the blocking column is inserted into a fifth clamping groove of the contact piece, double constraint is formed, and secondary locking is completed. In the process that the TPA piece slides between the primary lock position and the secondary lock position, the second clamping head is switched between the corresponding second clamping groove and the third clamping groove, accurate positioning of the TPA piece in the second direction is achieved, meanwhile, clear gear hand feeling is provided, and operation confirmation during assembly is facilitated. Besides, when unlocking is needed, the TPA piece can be pulled out in the second direction, the second clamping head slides to the third clamping groove from the second clamping groove, unlocking is completed, and at the moment, the jack contact piece can be taken out of the jack in the first direction. The whole unlocking process does not need to damage the structure, and daily maintenance and replacement of the contact piece are facilitated.

Description

Technical Field

[0001] This invention relates to the field of connector technology, and more specifically to a connector with a secondary locking mechanism. Background Technology

[0002] The description in this section provides only background information related to the disclosure of this invention and does not constitute prior art.

[0003] In existing technologies, secondary locking connectors typically include a base, a TPA (Terminal Position Assurance, or TPA for short), and socket contacts. However, existing connectors have the following drawbacks: First, many secondary locking structures are complex, with numerous parts or cumbersome assembly steps, resulting in high production costs and low assembly efficiency. Second, some secondary locking structures are inconvenient to unlock, sometimes requiring destructive disassembly, which is detrimental to later product maintenance, testing, and terminal replacement. Therefore, there is a need to invent a secondary locking connector with a simpler structure and easier non-destructive unlocking.

[0004] It should be noted that the above description of the technical background is only for the purpose of providing a clear and complete explanation of the technical solutions of the present invention and facilitating understanding by those skilled in the art. It should not be assumed that these technical solutions are known to those skilled in the art simply because they have been described in the background section of this invention. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a connector with a secondary lock.

[0006] To solve the above-mentioned technical problems, the present invention provides a connector with a secondary lock, comprising a base, a TPA component, and a socket contact component. The base has a socket at one end facing the socket contact component in a first direction. The socket contact component is inserted into the socket in the first direction. The base has a insertion groove in a second direction. The TPA component is inserted into the insertion groove in the second direction to constrain the position of the socket contact component. During insertion into the insertion groove, the TPA component has a primary lock position and a secondary lock position. The outer wall of the TPA component has a second slot and a third slot sequentially formed along its insertion direction. The third slot is located on the side of the second slot facing the bottom of the insertion groove in the second direction. The TPA component has third locking blocks on its two opposing inner walls in a third direction, and a stop post extending in the second direction is also provided in a portion of its surface away from the insertion end in the first direction. The base has corresponding second locking blocks that cooperate with the second and third slots. The socket contact component includes two elastic clips arranged opposite each other in a third direction. The elastic clip has a fourth recessed groove on its edge facing the TPA component in the second direction, and a fifth recessed groove is also provided on the edge in the first direction away from the insertion end. When the TPA component is in the primary locking position, the second locking block engages in the third groove, the insertion contact is inserted into the insertion hole, and the third locking block engages in the fourth groove to prevent the insertion contact from moving in the first direction in the opposite direction to its insertion direction. When the TPA component moves further in the second direction to the secondary locking position... At that time, the second locking block slides from the third locking slot into the second locking slot, the third locking block moves down and presses against the bottom surface of the fourth locking slot, and the lower end of the stop post is inserted into the fifth locking slot of the elastic clip to further prevent the insertion contact from moving in the first direction in the opposite direction to its insertion direction. When the TPA component moves from the secondary locking position to the primary locking position and completes one unlocking, the second locking block slides from the second locking slot into the third locking slot, and the lower end of the stop post disengages from the fifth locking slot. The first direction, the second direction, and the third direction are arranged to intersect each other.

[0007] Preferably, the outer wall of the TPA component is further provided with a first slot extending along a second direction. The first slot has a bottom end and a top end. The top end is one end facing the insertion start side of the TPA component along the second direction, and the bottom end is one end facing the bottom of the insertion slot along the second direction. The base is also provided with a first locking block that cooperates with the first slot. When the TPA component is in the primary locking position, the first locking block is engaged in the first slot, and the first locking block is located at the bottom end of the first slot. When the TPA component moves further along the second direction to the secondary locking position, the first locking block slides along the first slot to be limited by the top end of the first slot. When the TPA component moves from the secondary locking position to the primary locking position and completes one unlocking, the first locking block slides from the top end of the first slot to the bottom end of the first slot.

[0008] Preferably, the TPA component has two opposing sidewalls in a third direction. Each sidewall includes two locking walls spaced apart along a first direction and a spring arm located between the two locking walls. The spring arm is separated from the locking walls by a vertical partition groove, forming a cantilever beam structure with a fixed upper end and a free lower end. Each locking wall is provided with a first locking groove, a second locking groove, and a third locking groove. The third locking block is located near the free end of the inner side of the spring arm. The base has mating wall units corresponding to the two TPA component sidewalls respectively. Each mating wall unit includes a locking... The two locking surfaces corresponding to the wall position are connected by a connecting beam. The connecting beam is provided with a vertically penetrating clearance groove. Each locking surface is provided with a first locking block and a second locking block. When the TPA component completes one locking process, the TPA component is inserted into the insertion groove along the second direction. The spring arm passes through the outside of the connecting beam. The third locking block passes through the clearance groove. The insertion hole contact is inserted into the insertion hole along the first direction. The third locking block is locked into the fourth locking groove to restrict the reverse movement of the insertion hole contact along the first direction.

[0009] Preferably, the rear end face of the third locking block forms a first guide surface, and the front part of the fourth slot of the elastic clip protrudes upward to form a protrusion. The front end face of the protrusion is a second guide surface that mates with the first guide surface. When the insertion contact is inserted into the insertion hole in the first direction, the second guide surface can squeeze the first guide surface, causing the free ends of the two spring arms to spring outward in the third direction. As the insertion contact is inserted into place, the third locking block aligns with the fourth slot on the elastic clip, and the elastic restoring force of the spring arms drives its free ends to reset inward, causing the third locking block to engage in the fourth slot.

[0010] Preferably, the upper surface of the first locking block is a third guide surface, the upper surface of the second locking block is a fourth guide surface, and the lower surface of the third locking block is a fifth guide surface. The third guide surface is used to allow the first locking block to slide into the first slot when the TPA component is inserted into the primary locking position. The fourth guide surface is used to allow the second locking block to slide from the third slot into the second slot when the TPA component is inserted into the secondary locking position. The fifth guide surface is used to allow the TPA component to move upward along a second direction when the connector is unlocked for the first time, so that the second locking block slides from the second slot into the third slot.

[0011] Preferably, an unlocking groove is provided at the free end of the outer side of the spring arm. The unlocking groove is used to allow the spring arm to spring outward in a third direction under the external force of the tool after the unlocking tool is inserted, so that the insertion hole contact can move backward in a first direction until the third locking block leaves the fourth locking groove, thus completing the secondary unlocking.

[0012] Preferably, the lower opening of the third slot extends to the lower edge of the locking surface. When the TPA component is in the first locking position, the first locking block is located at the lower end of the first slot to restrict the TPA component from moving upward, and the second locking block is located at the upper end of the third slot to restrict the TPA component from moving downward.

[0013] By employing the above technical solutions, the beneficial effects of the present invention are as follows: The connector with a secondary lock of the present invention, when the TPA component is in the primary lock position, has its third locking block engage with the fourth slot of the socket contact, effectively preventing the socket contact from moving backward and achieving primary locking. When the TPA component is further pressed down towards the base along the second direction, the lower end of the stop post inserts into the fifth slot of the contact, forming a double constraint and completing the secondary lock. During the sliding process of the TPA component between the primary and secondary lock positions, its second locking head switches between the corresponding second and third slots, not only achieving accurate positioning of the TPA component in the second direction but also providing a clear tactile feel for the locking position, facilitating operation confirmation during assembly. Furthermore, when unlocking is required, the TPA component can be pulled out along the second direction, causing the second locking head to slide from the second slot to the third slot, thus completing the primary unlocking. At this time, the socket contact can be removed from the socket along the first direction. The entire unlocking process does not require structural damage, facilitating daily maintenance and replacement of the contact. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the connector of this application in its unassembled state.

[0015] Figure 2 This is a schematic diagram of the TPA component inserted into the pre-locking position according to this application.

[0016] Figure 3 This is a schematic diagram of the socket contact element after it is inserted into the base.

[0017] Figure 4 yes Figure 3 A magnified view of part A in the middle.

[0018] Figure 5 This is a schematic diagram of the connector of this application in the final locking position.

[0019] Figure 6 yes Figure 5 Enlarged view of part B in the middle section.

[0020] Figure 7 This is a cross-sectional structural diagram of the TPA component inserted into the pre-locking position according to this application.

[0021] Figure 8 yes Figure 7 A magnified view of part C in the middle.

[0022] Figure 9 yes Figure 7 A magnified view of part D in the middle.

[0023] Figure 10 This is a cross-sectional structural diagram of the connector of this application in the pre-shrink position.

[0024] Figure 11 yes Figure 10 A magnified view of part E in the middle.

[0025] Figure 12 This is a cross-sectional structural diagram of the connector of this application in the final locked state.

[0026] Figure 13 yes Figure 12 A magnified view of part F in the middle section.

[0027] Figure 14 yes Figure 12 A magnified view of part G in the middle.

[0028] Figure 15 This is a structural schematic diagram of the TPA component of this application.

[0029] Figure 16 This is a structural schematic diagram of the TPA component of this application.

[0030] Figure 17 This is a cross-sectional structural diagram of the TPA component of this application.

[0031] Figure 18 This is a schematic diagram of the base structure of this application.

[0032] Figure 19 This is a partial enlarged view of the base of this application.

[0033] Where: direction a is the first direction; direction b is the second direction; direction c is the third direction; 1. Base; 2. Socket contact; 3. TPA component; 4. Wiring; 11. Locking surface; 12. Connecting beam; 121. Clearance groove; 13. Socket groove; 14. Socket; 111. First locking block; 112. Second locking block; 1111. Third guide surface; 1122. Fourth guide surface; 1121. Fifth guide surface; 21. Fourth slot; 22. Fifth slot; 211. Second guide surface; 31. Socket wall; 32. Spring arm; 33. Stop post; 321. Unlocking groove; 322. Third locking block; 3221. First guide surface; 311. First slot; 312. Second slot; 313. Third slot; Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] It should be noted that in the description of this invention, the terms "first," "second," etc., are used only for descriptive purposes and to distinguish similar objects; there is no order between them, nor should they be construed as indicating or implying relative importance. Furthermore, in the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0036] like Figure 1-3 As shown in Figure 5, the present invention provides a connector with a secondary lock, comprising a base 1, a TPA component 3, and a socket contact 2. The base 1 has a socket 14 along a first direction, and the socket contact 2 can be inserted into the socket 14 along the first direction. The base 1 has a insertion groove 13 along a second direction, and the TPA component 3 is inserted into the insertion groove 13 along the second direction to constrain the position of the socket contact 2. During the insertion of the TPA component 3 into the insertion groove 13, it has a primary lock position and a secondary lock position.

[0037] like Figure 4 and 6As shown, the outer wall of the TPA component 3 is provided with a first slot 311, a second slot 312 and a third slot 313. The first slot 311 is an elongated slot extending along the second direction. The second slot 312 is located directly above the third slot 313. The TPA component 3 is provided with a third block 322 on the opposite surface in the third direction. The rear end of the TPA component 3 is also provided with a stop post 33. The base 1 is provided with a first block 111 that cooperates with the first slot 311 and a second block 112 that cooperates with the second slot 312 and the third slot 313.

[0038] The socket contact 2 includes two elastic clips arranged along a third direction, such as... Figure 10-14 As shown, the upper edge of the elastic clip is recessed downward to form a fourth groove 21, and the rear end of the upper edge is recessed downward to form a fifth groove 22.

[0039] like Figure 3 , 4 As shown in Figure 10, when the TPA component 3 is in the first locking position, the first locking block 111 is engaged in the first locking slot 311, the first locking block 111 is located at the lower end of the first locking slot 311, the second locking block 112 is engaged in the third locking slot 313, the socket contact 2 is inserted into the socket 14, and the third locking block 322 is engaged in the fourth locking slot 21 to prevent the socket contact 2 from moving backward in the first direction.

[0040] like Figure 5 , 6 As shown in 12, 13, and 14, when the TPA component 3 is further pressed down in the second direction to the secondary lock position, the first locking block 111 slides along the first slot 311 until it is limited by the top of the first slot 311, the second locking block 112 slides from the third slot 313 into the second slot 312, the third locking block 322 moves down and presses against the bottom surface of the fourth slot 21, and the lower end of the stop post 33 inserts into the fifth slot 22 of the elastic clip to further prevent the insertion contact 2 from moving backward in the first direction. When the TPA component 3 moves from the secondary lock position to the primary lock position, completing one unlocking, the first locking block 111 slides from the top of the first slot 311 to the bottom of the first slot 311, the second locking block 112 slides from the second slot 312 into the third slot 313, and the lower end of the stop post 33 disengages from the fifth slot 22.

[0041] like Figure 15-17As shown, the TPA component 3 has two opposing sidewalls in a third direction. Each sidewall includes two locking walls 31 spaced apart along a first direction and a spring arm 32 located between the two locking walls 31. The spring arm 32 is separated from the locking walls 31 by a vertical partition groove, forming a cantilever beam structure with a fixed upper end and a free lower end. Each locking wall 31 is provided with a first locking groove 311, a second locking groove 312, and a third locking groove 313. The third locking block 322 is located near the free end of the inner side of the spring arm 32. The base 1 has mating wall units corresponding to the two TPA component 3 sidewalls respectively. Each mating wall unit includes components corresponding to the positions of the locking walls 31. The two locking surfaces 11 are connected by a connecting beam 12. The connecting beam 12 is provided with a vertically penetrating clearance groove 121. Each locking surface 11 is provided with a first locking block 111 and a second locking block 112. When the TPA component 3 completes one locking process, the TPA component 3 is inserted into the insertion groove 13 along the second direction. The spring arm 32 passes through the outside of the connecting beam 12. The third locking block 322 passes through the clearance groove 121. The insertion hole contact 2 is inserted into the insertion hole 14 along the first direction. The third locking block 322 is locked into the fourth locking groove 21 to restrict the reverse movement of the insertion hole contact 2 along the first direction.

[0042] like Figure 11 and 13 As shown, the rear end face of the third locking block 322 forms a first guide surface 3221. The front part of the fourth slot 21 of the elastic clip protrudes upward to form a protrusion. The front end face of the protrusion is a second guide surface 211 that cooperates with the first guide surface 3221. When the insertion contact 2 is inserted into the insertion hole 14 in the first direction, the second guide surface 211 can squeeze the first guide surface 3221, causing the free ends of the two spring arms 32 to spring outward in the third direction. As the insertion contact 2 is inserted into place, the third locking block 322 aligns with the fourth slot 21 on the elastic clip. The elastic restoring force of the spring arm 32 drives its free end to reset inward, causing the third locking block 322 to be locked into the fourth slot 21.

[0043] like Figure 18 and 19As shown, the upper surface of the first locking block 111 is the third guide surface 1111, the upper surface of the second locking block 112 is the fourth guide surface 1122, and the lower surface of the third locking block 322 is the fifth guide surface 1121. The third guide surface 1111 is used to allow the first locking block 111 to slide into the first slot 311 when the TPA component 3 is inserted into the primary locking position. The fourth guide surface 1122 is used to allow the second locking block 112 to slide from the third slot 313 into the second slot 312 when the TPA component 3 is inserted into the secondary locking position. The fifth guide surface 1121 is used to allow the TPA component 3 to move upward along the second direction when the connector is unlocked for the first time, so that the second locking block 112 slides from the second slot 312 into the third slot 313. In a preferred embodiment, the lower opening of the third slot 313 extends to the lower edge of the locking surface 11. When the TPA component 3 is in the first locking position, the first locking block 111 is located at the lower end of the first slot 311 to restrict the TPA component 3 from moving upward, and the second locking block 112 is located at the upper end of the third slot 313 to restrict the TPA component 3 from moving downward.

[0044] like Figure 15 As shown, an unlocking groove 321 is also provided at the free end of the outer side of the spring arm 32. The unlocking groove 321 is used to allow the spring arm 32 to spring outward in a third direction under the external force of the tool after the unlocking tool is inserted, so that the insertion hole contact 2 can move backward in a first direction until the third card block 322 leaves the fourth card groove 21, thus completing the secondary unlocking.

[0045] The first direction, the second direction, and the third direction are set orthogonally to each other.

[0046] The connector structure with a secondary lock provided by the present invention comprises the following operation steps for primary locking, secondary locking, primary unlocking, and secondary unlocking: The locking process is as follows: Insert the TPA component 3 into the insertion slot 13 of the base 1 along the second direction (vertically downwards); press the TPA component 3 down until the first locking block 111 engages with the lower end of the first slot 311 and the second locking block 112 engages with the third slot 313, at which point the TPA component 3 reaches the locking position; insert the insertion contact 2 into the insertion hole 14 of the base 1 along the first direction; during the insertion of the insertion contact 2, the second guide surface 211 of its protrusion interacts with the first guide surface 3221 of the third locking block 322 on the TPA component 3, causing the spring arm 32 to elastically open outwards; when the insertion contact 2 is fully inserted, the spring arm 32 returns to its original position, and the third locking block 322 engages with the fourth slot 21 of the insertion contact 2. At this time, the TPA component 3, through the third locking block 322, constrains the insertion contact 2, preventing the insertion contact 2 from retracting along the first direction, thus completing the locking process.

[0047] Secondary locking steps: Based on the primary locking position, continue pressing the TPA component 3 downwards in the second direction; the first locking block 111 of the TPA component 3 slides upwards along the first slot 311 until it is limited at the top of the slot, and the second locking block 112 slides into the second slot 312 from the third slot 313; simultaneously, the third locking block 322 of the TPA component 3 moves downwards and presses against the bottom surface of the fourth slot 21, and the lower end of the stop post 33 at the rear end of the TPA component 3 inserts into the fifth slot 22 of the socket contact component 2. At this time, the TPA component 3 reaches the secondary locking position, further preventing the socket contact component 2 from loosening backwards due to vibration or external force, thus completing the secondary locking.

[0048] Unlocking steps: When it is necessary to disassemble the socket contact 2, first pull out the TPA 3 upward along the second direction; as the TPA 3 moves upward, the first locking block 111 slides from the top of the first slot 311 to the bottom of the slot, and the second locking block 112 slides back from the second slot 312 into the third slot 313; the lower end of the stop post 33 then disengages from the fifth slot 22, releasing the secondary locking of the socket contact 2; the TPA 3 returns to the primary locking position, completing the first unlocking. At this time, the socket contact 2 is still constrained in the primary locking state by the third locking block 322.

[0049] Secondary unlocking procedure: After the first unlocking, if it is necessary to remove the socket contact 2, insert the unlocking tool into the unlocking groove 321 on the outside of the spring arm 32 of the TPA component 3; apply force to both sides to make the spring arm 32 elastically open outward along the third direction, causing the third locking block 322 to disengage from the fourth locking groove 21 of the socket contact 2; at this time, the socket contact 2 moves backward along the first direction and can be easily pulled out from the socket 14. The whole process is simple to operate, does not require structural damage, and achieves non-destructive disassembly of the socket contact 2.

[0050] In this application, the directions in the connector are defined as follows: the first direction is the direction in which the socket contact 2 is inserted into the socket 14; the second direction is the direction in which the TPA 3 is inserted into the insertion slot 13, and intersects with the first direction; the third direction is the direction that intersects both the first and second directions. Based on the above definitions of directions, the directional terms used in this application have the following meanings: "Front" refers to the side facing the mating direction along the first direction (i.e., the insertion direction of the socket contact 2); "Back" refers to the side opposite to the insertion direction along the first direction (i.e., the direction in which the socket contact 2 is pulled out). "Up" refers to the direction away from the bottom of the insertion slot 13 along the second direction (i.e., the pull-out direction of the TPA part 3). "Down" refers to the direction along the second direction toward the bottom of the insertion slot 13 (i.e., the insertion direction of the TPA part 3). "Left" and "right" refer to the two sides along a third direction, and they are opposite to each other.

[0051] The above-described embodiments are merely preferred embodiments provided to fully illustrate the present invention, and the scope of protection of the present invention is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present invention are all within the scope of protection of the present invention. The scope of protection of the present invention is defined by the claims.

Claims

1. A connector with a secondary lock, characterized by, The application relates to a connector, which comprises a base (1), a TPA piece (3) and a jack contact piece (2). The base (1) is provided with a jack (14) at one end along a first direction towards the jack contact piece (2), and the jack contact piece (2) is inserted into the jack (14) along the first direction. The base (1) is provided with a plug-in slot (13) along a second direction, and the TPA piece (3) is inserted into the plug-in slot (13) along the second direction to positionally constrain the jack contact piece (2). The TPA piece (3) has a primary locking position and a secondary locking position during the insertion into the plug-in slot (13). The outer wall of the TPA piece (3) is sequentially provided with a second clamping groove (312) and a third clamping groove (313) along the insertion direction, wherein the third clamping groove (313) is located on the side of the second clamping groove (312) towards the bottom of the plug-in slot (13) along the second direction. The TPA piece (3) is provided with a third clamping block (322) on each of the two inner walls opposite to each other along a third direction, and is further provided with a blocking column (33) extending along the second direction at the part away from the insertion end along the first direction. The base (1) is correspondingly provided with a second clamping block (112) matched with the second clamping groove (312) and the third clamping groove (313). The jack contact piece (2) comprises two elastic clamping pieces oppositely arranged along the third direction, and each elastic clamping piece is provided with a fourth clamping groove (21) recessed towards the inner side at the edge towards the TPA piece (3) along the second direction, and is further provided with a fifth clamping groove (22) recessed towards the inner side at the part away from the insertion end along the first direction. When the TPA piece (3) is in the primary locking position, the second clamping block (112) is clamped into the third clamping groove (313), the jack contact piece (2) is inserted into the jack (14), and the third clamping block (322) is clamped into the fourth clamping groove (21) to prevent the movement of the jack contact piece (2) along the first direction opposite to the insertion direction. When the TPA piece (3) is further moved to the secondary locking position along the second direction, the second clamping block (112) slides from the third clamping groove (313) into the second clamping groove (312), the third clamping block (322) moves downward and is pressed against the bottom surface of the fourth clamping groove (21), and the lower end of the blocking column (33) is inserted into the fifth clamping groove (22) of the elastic clamping piece to further prevent the movement of the jack contact piece (2) along the first direction opposite to the insertion direction. When the TPA piece (3) is unlocked from the secondary locking position to the primary locking position, the second clamping block (112) slides from the second clamping groove (312) into the third clamping groove (313), and the lower end of the blocking column (33) is separated from the fifth clamping groove (22). The first direction, the second direction and the third direction are arranged to intersect with each other.

2. The connector according to claim 1, wherein the outer wall of the TPA piece (3) is further provided with a first clamping groove (311) extending along the second direction. ​ ​ The first clamping groove (311) has opposite bottom end and top end, the top end is one end of the insertion starting side of the TPA piece (3) in the second direction, and the bottom end is one end of the bottom of the insertion groove (13) in the second direction, The base (1) is also provided with a first clamping block (111) corresponding to the first clamping groove (311), When the TPA piece (3) is in the primary locking position, the first clamping block (111) is clamped into the first clamping groove (311), and the first clamping block (111) is located at the bottom end of the first clamping groove (311); when the TPA piece (3) is further moved to the secondary locking position in the second direction, the first clamping block (111) slides along the first clamping groove (311) to be limited by the top end of the first clamping groove (311); when the TPA piece (3) is from the secondary locking position to the primary locking position, the first clamping block (111) slides from the top end of the first clamping groove (311) to the bottom end of the first clamping groove (311).

3. The connector of claim 2, wherein: The TPA piece (3) has two opposite side walls in the third direction, each of which includes two clamping walls (31) spaced apart in the first direction and a spring arm (32) located between the two clamping walls (31), The spring arm (32) and the clamping wall (31) are separated by a vertical partition groove, forming a cantilever beam structure with a fixed upper end and a free lower end, Each clamping wall (31) is provided with the first clamping groove (311), the second clamping groove (312) and the third clamping groove (313), The third clamping block (322) is arranged near the free end of the inner side of the spring arm (32), The base (1) has a corresponding matching wall unit corresponding to the two TPA pieces (3) side walls, each matching wall unit includes two locking surfaces (11) corresponding to the position of the clamping wall (31), and the two locking surfaces (11) are connected by a connecting beam (12), the connecting beam (12) is provided with an upper and lower through avoiding groove (121), and each locking surface (11) is provided with the first clamping block (111) and the second clamping block (112), When the TPA piece (3) completes the primary locking process, the TPA piece (3) is inserted into the insertion groove (13) in the second direction, the spring arm (32) passes from the outer side of the connecting beam (12), the third clamping block (322) passes through the avoiding groove (121), the jack contact piece (2) is inserted into the jack (14) in the first direction, and the third clamping block (322) is clamped into the fourth clamping groove (21) to limit the reverse movement of the jack contact piece (2) in the first direction.

4. The connector of claim 2, wherein The rear end face of the third clamping block (322) constitutes a first guide surface (3221), The fourth slot (21) of the elastic clamping piece has a protruding part formed by the upward protruding of the front side part of the fourth slot (21), and the front end face of the protruding part is a second guide face (211) matched with the first guide face (3221), When the jack contact (2) is inserted into the jack (14) along the first direction, the second guide face (211) can press the first guide face (3221), so that the free ends of the two elastic arms (32) are opened outward along the third direction, and as the jack contact (2) is inserted into position, the third clamping block (322) is aligned with the fourth slot (21) on the elastic clamping piece, and the elastic restoring force of the elastic arm (32) drives the free end thereof to reset inward, thereby driving the third clamping block (322) to be clamped into the fourth slot (21).

5. The connector of claim 4, wherein, The upper end face of the first clamping block (111) is a third guide face (1111), the upper end face of the second clamping block (112) is a fourth guide face (1122), and the lower end face of the third clamping block (322) is a fifth guide face (1121), The third guide face (1111) is used for sliding the first clamping block (111) into the first slot (311) when the TPA piece (3) is inserted into the primary locking position, The fourth guide face (1122) is used for sliding the second clamping block (112) from the third slot (313) into the second slot (312) when the TPA piece (3) is inserted into the secondary locking position, The fifth guide face (1121) is used for moving the TPA piece (3) upward along the second direction when the connector is primary unlocked, so that the second clamping block (112) is slid from the second slot (312) into the third slot (313).

6. The connector of claim 5, wherein, The free end of the outer side of the elastic arm (32) is further provided with an unlocking slot (321), the unlocking slot (321) is used for inserting an unlocking tool, and under the external force of the tool, the elastic arm (32) is opened outward along the third direction, so that the jack contact (2) can be moved backward along the first direction to the fourth slot (21) away from the third clamping block (322), and the secondary unlocking is completed.

7. The connector of claim 2, wherein The lower end opening of the third slot (313) extends to the lower edge of the locking face (11), when the TPA piece (3) is in the primary locking position, the first clamping block (111) is located at the lower end of the first slot (311), so as to limit the upward movement of the TPA piece (3), and the second clamping block (112) is located at the upper end of the third slot (313), so as to limit the downward movement of the TPA piece (3).

Images